CN111951517A - Novel photoelectric smoke detector - Google Patents
Novel photoelectric smoke detector Download PDFInfo
- Publication number
- CN111951517A CN111951517A CN202010972889.5A CN202010972889A CN111951517A CN 111951517 A CN111951517 A CN 111951517A CN 202010972889 A CN202010972889 A CN 202010972889A CN 111951517 A CN111951517 A CN 111951517A
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- patch type
- labyrinth
- light
- tube
- receiving tube
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- 239000000779 smoke Substances 0.000 title claims abstract description 75
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000000306 component Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
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Classifications
-
- 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
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a novel photoelectric smoke detector, which comprises a labyrinth, a circuit board and a smoke detection chamber, wherein the labyrinth is arranged on the upper surface of the labyrinth; the novel photoelectric smoke detector also comprises a partition component for dividing the smoke detection chamber into a common region and an attenuation region; the attenuation area is communicated with the common area; the attenuation region is used for reflecting light rays entering the attenuation region for multiple times; the upper surface of the circuit board is fixedly provided with a patch type transmitting tube for providing light to the smoke detection chamber and a patch type receiving tube for receiving the light scattered by smoke when smoke exists in the common area; the labyrinth is provided with a light outlet channel for the light emitted by the patch type emitting tube to enter the smoke detection chamber and a light inlet channel for the patch type receiving tube to receive the light scattered by the smoke; the communication part of the common area and the attenuation area is opposite to the outlet of the light outlet channel. This photoelectric smoke detector possesses the high-efficient assembly of being convenient for, prevents the effectual advantage of mistake warning.
Description
Technical Field
The invention relates to the technical field of smoke detectors, in particular to a novel photoelectric smoke detector.
Background
The optical maze is a necessary core component of the smoke detector when detecting fire. At present, a transmitting tube and a receiving tube in an optical labyrinth are provided with longer metal tube legs, and when the optical labyrinth is assembled, metal tube legs need to be bent firstly, and then the metal tube legs are manually inserted into the optical labyrinth, so that time and labor are wasted, and the production efficiency is low; moreover, the error of manual assembly is large, and the quality of batch products is inconsistent; moreover, the metal pipe legs are easily interfered by external signals, and a shielding cover is often matched to ensure the working stability, so that the production cost is increased; furthermore, in a relatively humid working environment, the metal legs are susceptible to moisture or corrosion.
Disclosure of Invention
The present invention provides a novel photoelectric smoke detector, which is designed to solve the above-mentioned problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
constructing a novel photoelectric smoke detector, which comprises a labyrinth, wherein the upper surface of the labyrinth is provided with a smoke detection chamber, and a circuit board positioned below the labyrinth; the novel photoelectric smoke detector also comprises a partition component which divides the smoke detection chamber into a common region and an attenuation region; the attenuation region is communicated with the common region; the attenuation region is used for reflecting light rays entering the attenuation region for multiple times; the upper surface of the circuit board is fixedly provided with a patch type transmitting tube for providing light rays to the smoke detection chamber and a patch type receiving tube for receiving the light rays; the labyrinth is provided with a light outlet channel for the light emitted by the patch type emitting tube to enter the smoke detection chamber and a light inlet channel for the patch type receiving tube to receive the light scattered by the smoke; the communication position of the common area and the attenuation area is opposite to the outlet of the light outlet channel.
Preferably, the patch type transmitting tube and the patch type receiving tube are both towards the right upper side; the inside of the labyrinth is filled with a plurality of prisms which are distributed on the horizontal plane in a circumferential manner; the patch type transmitting tube and the patch type receiving tube are both provided with one corresponding prism; the prism corresponding to the patch type emission tube reflects the light rays emitted by the patch type emission tube towards the attenuation area; the prism corresponding to the patch type receiving tube reflects the scattered light rays of the smoke collected in the common area towards the patch type receiving tube; the light outlet channel and the light inlet channel correspond to the prism.
Preferably, the inside of the labyrinth is filled with at least one group of hard connecting strips; two adjacent prisms are fixedly integrated through the connecting strips.
Preferably, the connecting strip and the prism are integrally formed; the extension route of the connecting strip is circuitous.
Preferably, the labyrinth comprises a labyrinth seat and a labyrinth upper cover which are detachably connected; the surfaces of the labyrinth seat and the labyrinth upper cover which are opposite are respectively provided with a plurality of first positioning grooves which are in one-to-one correspondence with the prisms; the lower surface of the labyrinth seat is provided with a plurality of second positioning grooves; the patch type transmitting tube and the patch type receiving tube are both provided with one corresponding second positioning groove; the smoke detection chamber and the partition component are both arranged on the labyrinth seat; the labyrinth seat with the labyrinth upper cover all is provided with the light-emitting channel with advance the light passageway.
Preferably, the partition assembly includes two sets of first reflection plates each fixed to an inner wall of the labyrinth; along the incident direction of the light emitted from the light emitting channel, the distance between the two groups of first reflecting plates is gradually increased.
Preferably, the inner side surface of the labyrinth, which is opposite to the outlet of the light outlet channel, is an inner concave surface.
Preferably, the patch type transmitting tube and the patch type receiving tube are both in a vertical state; the patch type transmitting tube and the patch type receiving tube are opposite to the smoke detection chamber; the patch type emission tube emits light along the horizontal direction; the patch type transmitting tube and the patch type receiving tube are distributed on the horizontal plane in a circumferential manner, and the circle center of a distribution circle falls in the common area during smoke detection; the lower surface of the labyrinth is provided with a plurality of third positioning grooves; the patch type transmitting tube and the patch type receiving tube are both provided with one corresponding third positioning groove.
Preferably, the patch type transmitting tube and the patch type receiving tube are both in a vertical state; the patch type transmitting tube and the patch type receiving tube face the smoke detection chamber; the patch type emission tube emits light along the oblique upper direction; the patch type transmitting tube and the patch type receiving tube are distributed on the horizontal plane in a circumferential manner, and the circle center of a distribution circle falls in the common area during smoke detection; the lower surface of the labyrinth is provided with a plurality of fourth positioning grooves; the patch type transmitting tube and the patch type receiving tube are both provided with one corresponding fourth positioning groove.
Preferably, the novel photoelectric smoke detector further comprises an insect-proof net covering the labyrinth; the insect-proof net, the labyrinth and the circuit board are fixed together; at least one group of second reflecting plates are fixedly arranged in the labyrinth; the second reflecting plate is used for emitting the light rays emitted by the patch type emitting tube towards the attenuation area; at least one group of second reflecting plates is correspondingly arranged on the patch type transmitting tube.
The invention has the beneficial effects that:
is convenient for high-efficiency assembly. During production, the chip mounter can mount the patch type transmitting tubes and the patch type receiving tubes in batches efficiently, the previous step of manually bending metal pins and then inserting the metal pins is replaced, the assembly efficiency is greatly improved, and the quality consistency of the products in batches is effectively guaranteed; in addition, the pins of the patch type transmitting tube and the patch type receiving tube are short, and the pins are tightly attached to the circuit board.
The anti-error alarm effect is good. When no smoke exists, light rays in the light outlet channel irradiate the attenuation area and are continuously reflected after entering the attenuation area, the light energy is greatly attenuated, and finally the light rays which are emitted from the attenuation area to the common area and received by the patch type receiving tube are very few, so that the condition of false alarm is effectively avoided, and the detection accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
fig. 1 is an exploded view of a novel photoelectric smoke detector provided in accordance with an embodiment of the present invention;
fig. 2 is a top view of a novel photoelectric smoke detector provided in an embodiment of the present invention (with an insect-proof net, a circuit board, and a labyrinth cover hidden);
fig. 3 is a cut-away view of a novel photoelectric smoke detector provided in the second embodiment of the present invention;
fig. 4 is a cut-away view of a novel photoelectric smoke detector provided in the third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
Example one
The embodiment provides a novel photoelectric smoke detector, as shown in fig. 1-2, comprising a labyrinth 10 with a smoke detection chamber 180 arranged on the upper surface, and a circuit board 11 located below the labyrinth 10; the novel photoelectric smoke detector also comprises a sub-component 12 which divides the smoke detection chamber 180 into a common area 181 and an attenuation area 182; the attenuation region 182 communicates with the common region 181; the attenuation region 182 allows multiple reflections of light entering the region; the upper surface of the circuit board 11 is fixedly provided with a patch type transmitting tube 13 for providing light to the smoke detection chamber 180 and a patch type receiving tube 14 for receiving the light; the labyrinth 10 is provided with a light outlet channel 183 for allowing the light emitted by the patch type emitting tube 13 to enter the smoke detection chamber 180, and a light inlet channel 184 for allowing the patch type receiving tube 14 to receive the light scattered by the smoke; the communication part of the common region 181 and the attenuation region 182 is opposite to the outlet of the light outlet channel 183. This photoelectric smoke detector possesses following advantage:
is convenient for high-efficiency assembly. During production, the chip mounter can mount the patch type transmitting tubes 13 and the patch type receiving tubes 14 in batches efficiently, the previous step of manually bending metal pins and then inserting the metal pins is replaced, the assembly efficiency is greatly improved, and the quality consistency of products in batches is effectively guaranteed; in addition, the pins of the patch type transmitting tube 13 and the patch type receiving tube 14 are short, and the pins are tightly attached to the circuit board 11, so that compared with the prior art, the exposed area of the pins is greatly reduced, the pins are slightly interfered by external signals, and the pins are not easily affected with damp or corrosion.
The anti-error alarm effect is good. When no smoke exists, the light in the light-emitting channel 183 is emitted to the attenuation area 182, and is continuously reflected after entering the attenuation area 182, so that the light energy is greatly attenuated, and finally, the light which is emitted from the attenuation area 182 to the common area 181 and is received by the patch type receiving tube 14 is very little, thereby effectively avoiding the situation of false alarm and improving the accuracy of detection.
As shown in fig. 1-2, the patch type transmitting tube 13 and the patch type receiving tube 14 both face upward; the inside of the labyrinth 10 is filled with a plurality of prisms 15 distributed circumferentially on a horizontal plane; the patch type transmitting tube 13 and the patch type receiving tube 14 are both provided with a prism 15 correspondingly; the prism 15 corresponding to the patch type emission tube 13 reflects the light emitted by the patch type emission tube 13 toward the attenuation region 182; the prism 15 corresponding to the patch type receiving tube 14 reflects the scattered light of the smoke collected in the ordinary region 181 towards the patch type receiving tube 14; the light outlet channel 183 and the light inlet channel 184 correspond to the prism 15. The propagation direction of light can be adjusted through the prism 15, and the leaded light is more nimble, and simple to operate.
As shown in fig. 1-2, the inside of the labyrinth 10 is filled with at least one set of hard connecting strips 16; two adjacent prisms 15 set firmly through connecting strip 16 and become an organic whole, and during the user's assembly, just can put into maze 10 with connecting strip 16 and prism 15 are whole, and the structure of integration has reduced the part total number, assembles labour saving and time saving.
As shown in fig. 1-2, connecting strip 16 is integrally formed with prism 15; the extending route of the connecting strip 16 is circuitous, and the circuitous route can reflect the light entering the connecting strip 16 for multiple times, so that the light energy is greatly consumed, and the condition that the light directly enters the prism 15 corresponding to the patch type receiving tube 14 through the connecting strip 16 to cause false alarm is avoided.
It should be noted that the shape of the connecting strip 16 may be a zigzag shape or a spiral shape, in addition to the shape shown in the drawings.
As shown in fig. 1-2, the labyrinth 10 includes a labyrinth seat 17 and a labyrinth upper cover 18 which are detachably connected; the opposite surfaces of the labyrinth seat 17 and the labyrinth upper cover 18 are provided with a plurality of first positioning grooves 185 corresponding to the plurality of prisms 15 one to one; the lower surface of the labyrinth seat 17 is provided with a plurality of second positioning grooves (not shown in the figure); the patch type transmitting tube 13 and the patch type receiving tube 14 are both provided with a second positioning groove (not shown in the figure) correspondingly; the smoke detection chamber 180 and the partition component are both arranged on the labyrinth seat 17; the labyrinth seat 17 and the labyrinth upper cover 18 are both provided with a light outlet channel 183 and a light inlet channel 184, so that the labyrinth 10 is divided into two parts, the prism 15 can be conveniently placed, and the assembly work is simplified; in addition, with the help of the constant head tank, the location is efficient, and location effect is good.
It should be noted that, the fixing manner of the labyrinth seat 17 and the labyrinth upper cover 18 includes, but is not limited to, a snap slot, a bolt, and a magnet.
As shown in fig. 1-2, the partition member 12 includes two sets of first reflection plates 19 each fixed to an inner wall of the labyrinth 10; along the incident direction of the light emitted from the light emitting channel 183, the distance between the two sets of first reflective plates 19 gradually increases, and the structure is simple and the attenuation effect is good.
As shown in fig. 1-2, the inner surface of the labyrinth 10 opposite to the outlet of the light-emitting channel 183 is an inner concave surface, so that more light is reflected toward the first reflective plate 19, and the attenuation effect is optimized.
As shown in fig. 1-2, the novel photoelectric smoke detector further comprises an insect-proof net 110 covering the labyrinth 10; the insect-proof net 110, the maze 10 and the circuit board 11 are fixed together; at least one group of second reflection plates 111 are fixedly arranged inside the labyrinth 10; the second reflecting plate 111 is used for emitting the light emitted by the patch type emitting tube 13 towards the attenuation region 182, and can restrict the light coming out of the light-emitting channel 183 and enable the light to be emitted to the attenuation region 182 in a more collimated manner; the patch type emission tube 13 is provided with at least one group of second reflection plates 111.
Example two
This embodiment provides a novel photoelectric smoke detector, and the same with embodiment one is no longer repeated, and the difference lies in, as shown in fig. 3: the patch type transmitting tube 13 and the patch type receiving tube (not shown in the figure) are both in a vertical state; the patch type transmitting tube 13 and the patch type receiving tube (not shown in the figure) are opposite to the smoke detection chamber (not shown in the figure), and a good detection effect can be realized without additionally arranging a light guide part such as a prism; the patch type emission tube 13 emits light in the horizontal direction; the patch type transmitting tube 13 and the patch type receiving tube (not shown in the figure) are distributed on the horizontal plane in a circumferential manner, and the circle center of a distribution circle falls in a common area (not shown in the figure) during smoke detection; the lower surface of the labyrinth is provided with a plurality of third positioning grooves 186; the patch type transmitting tube 13 and the patch type receiving tube (not shown in the figure) are both provided with a third positioning groove 186.
EXAMPLE III
This embodiment provides a novel photoelectric smoke detector, and the same with embodiment one is no longer repeated, and the difference lies in, as shown in fig. 4: the patch type transmitting tube 13 and the patch type receiving tube (not shown in the figure) are both in a vertical state; the patch type transmitting tube 13 and the patch type receiving tube (not shown in the figure) face the smoke detection chamber (not shown in the figure), and a good detection effect can be realized without additionally arranging a light guide part such as a light guide strip; the patch type emission tube 13 emits light along an oblique upper direction; the patch type transmitting tube 13 and the patch type receiving tube (not shown in the figure) are distributed on the horizontal plane in a circumferential manner, and the circle center of a distribution circle falls in a common area (not shown in the figure) during smoke detection; the lower surface of the labyrinth is provided with a plurality of fourth positioning grooves 187; the patch type transmitting tube 13 and the patch type receiving tube (not shown) each have a fourth positioning groove 187.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A novel photoelectric smoke detector comprises a labyrinth, a circuit board and a smoke detection chamber, wherein the labyrinth is arranged on the upper surface of the labyrinth; the novel photoelectric smoke detector is characterized by further comprising a partition component for dividing the smoke detection chamber into a common region and an attenuation region; the attenuation region is communicated with the common region; the attenuation region is used for reflecting light rays entering the attenuation region for multiple times; the upper surface of the circuit board is fixedly provided with a patch type transmitting tube for providing light rays to the smoke detection chamber and a patch type receiving tube for receiving the light rays; the labyrinth is provided with a light outlet channel for the light emitted by the patch type emitting tube to enter the smoke detection chamber and a light inlet channel for the patch type receiving tube to receive the light scattered by the smoke; the communication position of the common area and the attenuation area is opposite to the outlet of the light outlet channel.
2. The novel photoelectric smoke detector according to claim 1, wherein the patch type transmitting tube and the patch type receiving tube are both directed upwards; the inside of the labyrinth is filled with a plurality of prisms which are distributed on the horizontal plane in a circumferential manner; the patch type transmitting tube and the patch type receiving tube are both provided with one corresponding prism; the prism corresponding to the patch type emission tube reflects the light rays emitted by the patch type emission tube towards the attenuation area; the prism corresponding to the patch type receiving tube reflects the scattered light rays of the smoke collected in the common area towards the patch type receiving tube; the light outlet channel and the light inlet channel correspond to the prism.
3. The novel photoelectric smoke detector according to claim 2, characterized in that the inside of the labyrinth is filled with at least one group of hard connecting strips; two adjacent prisms are fixedly integrated through the connecting strips.
4. The novel photoelectric smoke detector according to claim 3, wherein the connecting strips are integrally formed with the prism; the extension route of the connecting strip is circuitous.
5. The novel photoelectric smoke detector as claimed in claim 2, wherein the labyrinth comprises a labyrinth seat and a labyrinth upper cover which are detachably connected; the surfaces of the labyrinth seat and the labyrinth upper cover which are opposite are respectively provided with a plurality of first positioning grooves which are in one-to-one correspondence with the prisms; the lower surface of the labyrinth seat is provided with a plurality of second positioning grooves; the patch type transmitting tube and the patch type receiving tube are both provided with one corresponding second positioning groove; the smoke detection chamber and the partition component are both arranged on the labyrinth seat; the labyrinth seat with the labyrinth upper cover all is provided with the light-emitting channel with advance the light passageway.
6. The novel photoelectric smoke detector according to claim 1, wherein the partition assembly comprises two groups of first reflecting plates which are fixed with the inner wall of the labyrinth; along the incident direction of the light emitted from the light emitting channel, the distance between the two groups of first reflecting plates is gradually increased.
7. The novel photoelectric smoke detector according to claim 6, wherein the inner side surface of the labyrinth opposite to the outlet of the light outlet channel is an inner concave surface.
8. The novel photoelectric smoke detector according to claim 1, wherein the patch type transmitting tube and the patch type receiving tube are both in a vertical state; the patch type transmitting tube and the patch type receiving tube are opposite to the smoke detection chamber; the patch type emission tube emits light along the horizontal direction; the patch type transmitting tube and the patch type receiving tube are distributed on the horizontal plane in a circumferential manner, and the circle center of a distribution circle falls in the common area during smoke detection; the lower surface of the labyrinth is provided with a plurality of third positioning grooves; the patch type transmitting tube and the patch type receiving tube are both provided with one corresponding third positioning groove.
9. The novel photoelectric smoke detector according to claim 1, wherein the patch type transmitting tube and the patch type receiving tube are both in a vertical state; the patch type transmitting tube and the patch type receiving tube face the smoke detection chamber; the patch type emission tube emits light along the oblique upper direction; the patch type transmitting tube and the patch type receiving tube are distributed on the horizontal plane in a circumferential manner, and the circle center of a distribution circle falls in the common area during smoke detection; the lower surface of the labyrinth is provided with a plurality of fourth positioning grooves; the patch type transmitting tube and the patch type receiving tube are both provided with one corresponding fourth positioning groove.
10. The novel photoelectric smoke detector according to claim 1, further comprising an insect-proof net covering the labyrinth; the insect-proof net, the labyrinth and the circuit board are fixed together; at least one group of second reflecting plates are fixedly arranged in the labyrinth; the second reflecting plate is used for emitting the light rays emitted by the patch type emitting tube towards the attenuation area; at least one group of second reflecting plates is correspondingly arranged on the patch type transmitting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972889.5A CN111951517A (en) | 2020-09-16 | 2020-09-16 | Novel photoelectric smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972889.5A CN111951517A (en) | 2020-09-16 | 2020-09-16 | Novel photoelectric smoke detector |
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| Publication Number | Publication Date |
|---|---|
| CN111951517A true CN111951517A (en) | 2020-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010972889.5A Pending CN111951517A (en) | 2020-09-16 | 2020-09-16 | Novel photoelectric smoke detector |
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| Country | Link |
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| CN (1) | CN111951517A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113808365A (en) * | 2021-03-10 | 2021-12-17 | 勾利金 | Dimming point type photoelectric smoke detector labyrinth and detector |
| EP4530685A1 (en) * | 2023-09-28 | 2025-04-02 | Wagner Group GmbH | Prism optical and prism-optical particle detection unit |
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| US6184537B1 (en) * | 1996-05-03 | 2001-02-06 | Vision Products Pty Ltd. | Detection of airborne pollutants |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113808365A (en) * | 2021-03-10 | 2021-12-17 | 勾利金 | Dimming point type photoelectric smoke detector labyrinth and detector |
| EP4530685A1 (en) * | 2023-09-28 | 2025-04-02 | Wagner Group GmbH | Prism optical and prism-optical particle detection unit |
| WO2025068473A1 (en) * | 2023-09-28 | 2025-04-03 | Wagner Group Gmbh | Optical prism and particle detection unit with optical prism |
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