CN113990024A - Flow channel structure of smoke detector with dustproof performance and smoke detector - Google Patents
Flow channel structure of smoke detector with dustproof performance and smoke detector Download PDFInfo
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- CN113990024A CN113990024A CN202111407861.8A CN202111407861A CN113990024A CN 113990024 A CN113990024 A CN 113990024A CN 202111407861 A CN202111407861 A CN 202111407861A CN 113990024 A CN113990024 A CN 113990024A
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- dust separation
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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
- 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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Abstract
The invention relates to a flow channel structure of a smoke detector with dustproof performance, which comprises a bottom shell and an annular upper cover, wherein the top of the bottom shell is provided with an inverted frustum-shaped groove; the dust separation plate is provided with dust separation plate through holes at intervals along the circumferential direction, the upper surface of the dust separation plate extends to form a dust blocking part at the outer edge, and the lower surface of the dust separation plate extends downwards and outwards to form an arc-shaped abutting part at the outer edge; the bottom shell is connected to the lower surface of the dust separation plate, a plurality of connecting plates which are connected with the dust separation plate and separate a plurality of dust separation plate through holes are arranged at the bottom of the upper cover along the circumferential direction, and the smoke detector adopting the flow channel structure is further disclosed. The invention also has the dustproof function when ensuring the smoke sensing performance of the detector, and reduces the false alarm phenomenon of the detector.
Description
Technical Field
The invention relates to the field of security protection, in particular to a flow channel structure of a smoke detector with dustproof performance and the smoke detector.
Background
At present, photoelectric smoke detectors in the market mainly detect the concentration of smoke particles by using an optical maze based on the principle of particle-optical Mie scattering, and the detectors give an alarm when the concentration of the smoke particles reaches an alarm threshold. Since the photoelectric smoke detector is essentially detecting the light scattering signal of particles, non-smoke particles can also cause light scattering, such as dust, water vapor, etc., consistent with the principle of light scattering of smoke particles. Dust is ubiquitous in daily environment, especially in places with large wind and sand, and due to the accumulation of the dust in a detector labyrinth, a phenomenon of false alarm is caused frequently. The existing products on the market are mainly focused on the smoke inlet performance of the detector, the smoke inlet part of the labyrinth is kept smooth and unobstructed as far as possible structurally, and the labyrinth is directly contacted with the external environment, so that the smoke sensing performance of the detector is easily ensured, but the smoke detector does not have an effective dustproof effect, dust accumulation is easy, and the phenomenon of misinformation is caused.
Disclosure of Invention
Aiming at the existing defects, the invention provides a flow channel structure of a smoke detector with dustproof performance and the smoke detector.
The technical scheme adopted by the invention for solving the technical problems is as follows: a flow channel structure of a smoke detector with dustproof performance comprises a bottom shell with an inverted frustum-shaped groove at the top and an annular upper cover, wherein an annular dust separation plate is arranged between the bottom shell and the upper cover; a plurality of dust separation plate through holes penetrating through the upper surface and the lower surface of the dust separation plate are arranged on the dust separation plate at intervals along the circumferential direction, a dust blocking part surrounding the dust separation plate for one circle extends upwards and vertically from the outer edge of the upper surface of the dust separation plate, and an inwards concave arc-shaped abutting part extends downwards and outwards from the outer edge of the lower surface of the dust separation plate; the bottom shell is connected to the lower surface of the dust separation plate, and a plurality of connecting plates which are connected with the dust separation plate and are used for spacing the through holes of the dust separation plate are arranged at the bottom of the upper cover along the circumferential direction.
Preferably, the upper cover is vertically extended downwards at the inner edge of the bottom part and is provided with an upper cover baffle plate which surrounds the inner ring of the upper cover and corresponds to the dust blocking part.
Preferably, the height of the dust blocking part is smaller than that of the upper cover baffle, and the sum of the heights of the dust blocking part and the upper cover baffle is not larger than the distance from the bottom of the upper cover to the top of the dust separation plate.
Preferably, the radial length of the connecting plate is not less than the thickness of the ring of the upper cover.
Preferably, the dust-separation plate through holes are arranged in 8 equal intervals.
Preferably, a plurality of bottom shell baffles which are of inverted right-angle trapezoid structures and correspond to the connecting plates and separate the inner wall of the bottom shell are arranged on the inner wall of the bottom shell.
Preferably, the bottom surface of the bottom shell is provided with a bottom shell through hole.
Preferably, the dust separation plate through hole is a fan-shaped through hole.
A smoke detector with dustproof performance is characterized by comprising a shell, a base and a dust separation plate, wherein the upper surface of the shell is provided with a containing groove, the bottom of the base is provided with a labyrinth, a plurality of shell through holes are formed in the shell at intervals along the circumferential direction, the containing groove is internally provided with a flow channel structure according to any one of claims 1 to 8, the bottom of the bottom shell is connected to the bottom of the containing groove, the dust separation plate and an upper cover are sleeved on the outer wall of the labyrinth in a matching mode, the dust separation plate through holes are arranged corresponding to the shell through holes, and the top of the upper cover is connected to the bottom of the base.
Preferably, the base is connected with the wall of the containing groove at the side wall.
The invention has the beneficial effects that: according to the invention, the smoke inlet flow channel is subjected to layered treatment, the upper layer is a smoke gathering channel, the lower layer is a smoke collecting channel, smoke concentration gradients are formed in the two channels, so that the smoke can better enter a labyrinth, meanwhile, the dust separation plate can effectively reduce dust in the smoke, more dust is prevented from entering the labyrinth along with smoke airflow, the labyrinth is prevented from being in direct contact with the external environment, the fire smoke smoothly flows into the labyrinth, the requirement of fire sensitivity is met, meanwhile, the dust prevention effect is achieved, the false alarm phenomenon of the detector is reduced, and the detection of the detector is more accurate.
Drawings
FIG. 1 is a schematic cross-sectional view of a smoke detector according to an embodiment of the present invention;
FIG. 2 is a schematic view of a flow channel structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of an exploded view of a smoke detector according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a smoke detector according to an embodiment of the present invention;
FIG. 5 is a schematic view of a bottom case structure according to an embodiment of the present invention;
FIG. 6 is a schematic view of the bottom structure of the upper cover according to the embodiment of the present invention;
FIG. 7 is a schematic view of a dust-proof plate according to an embodiment of the present invention;
part names and serial numbers in the figure: 1-bottom shell 10-bottom shell baffle 11-bottom shell through hole 2-upper cover 20-connecting plate 21-upper cover baffle 3-dust-proof plate 30-dust-proof plate through hole 31-dust-proof part 32-abutting part 4-shell 40-containing groove 41-shell through hole 5-labyrinth 6-base.
Detailed Description
To more clearly illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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. In addition, directional terms used in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., refer to directions only as shown in the attached drawings, and are used for better and clearer explanation and understanding of the present invention, and do not indicate or imply orientation which the present invention must have, and thus, should not be construed as limiting the present invention.
The embodiment of the invention is shown in fig. 1 to 7, a flow channel structure of a smoke detector with dustproof performance comprises a bottom shell 1 and an annular upper cover 2, wherein the top of the bottom shell 1 is provided with an inverted truncated cone-shaped groove, the inverted truncated cone-shaped groove on the bottom shell 1 means that the inner space of the groove is gradually reduced from top to bottom, an annular dust separation plate 3 is arranged between the bottom shell 1 and the upper cover 2, the inner diameter of a ring of the dust separation plate 3 is equivalent to that of the ring of the upper cover 2, and the upper cover 2, the dust separation plate 3 and the bottom shell 1 are sequentially formed from top to bottom; a plurality of dust separation plate through holes 30 penetrating through the upper surface and the lower surface of the dust separation plate 3 are circumferentially arranged on the dust separation plate 3 at intervals, the dust separation plate through holes 30 are fan-shaped through holes, a dust blocking part 31 which surrounds the dust separation plate 3 by a circle is vertically extended upwards on the outer edge of the upper surface of the dust separation plate 3, and an inwards concave arc-shaped abutting part 32 is downwardly and outwardly extended on the outer edge of the lower surface of the dust separation plate 3; the bottom shell 1 is connected to the lower surface of the dust-proof plate 3, and the bottom of the upper cover 2 is circumferentially provided with a plurality of connecting plates 20 which are connected to the dust-proof plate 3 and which space a plurality of dust-proof plate through holes 30 from each other. The connection between each component can adopt a clamping structure or be connected through screws, a lower layer space is formed between the dust-proof plate 3 and the bottom shell 1, the dust-proof plate 3 and the upper cover 2 form an upper layer space, a plurality of connecting plates 20 in the upper layer space divide the upper layer space into small smoke circulation spaces according to the dust-proof plate through holes 30, one small smoke circulation space is a smoke circulation channel, thus the smoke inlet channel of smoke is layered, the upper layer is a smoke gathering channel formed by the dust-proof plate 3 and the upper cover 2, the lower layer is a smoke collecting channel formed by the dust-proof plate 3 and the bottom shell 1, the two layers are communicated through the dust-proof plate through plates 30, meanwhile, in the smoke inlet, the dust-proof part 31 can prevent partial dust from entering the smoke gathering channel along with air flow, the abutting part 32 and the dust-proof part 31 form a cross section contraction flow guide structure which is beneficial to the smoke diffusing and entering the smoke gathering channel, when enough smoke is gathered in the smoke gathering channel, gather the smog in cigarette passageway and the receipts cigarette passageway and just form concentration gradient, smog will get into through dust-proof board through-hole 30 and receive the cigarette passageway, dust-proof board 3 just is further to the dust fall processing of dusty air current, inside preventing that more dust from getting into the maze along with the air current, pollute the maze, at this moment, the inverted frustum shape recess of drain pan 1 has also formed cross-section shrink water conservancy diversion structure, so that smog gathering, form sufficient concentration gradient again with the maze is inside, make smog have diffusion power to flow into the maze inside again, just so avoided the direct and external environment contact in maze, but through runner structure and external environment intercommunication, can satisfy the smoke sensing performance, can reach dirt-proof effect again. When the dust-proof smoke detector is applied to the smoke detector, the dust-proof smoke detector is formed, at the moment, the detector comprises a shell 4 with an accommodating groove 40 on the upper surface and a base 6 with a labyrinth 5 arranged at the bottom, a plurality of shell through holes 41 are arranged on the shell 4 at intervals along the circumferential direction, a flow channel structure is arranged in the accommodating groove 40, the bottom of a bottom shell 1 in the flow channel structure is connected with the bottom of the accommodating groove 40, a dust-proof plate 3 and an upper cover 2 are sleeved on the outer wall of the labyrinth 5 in a matching way, the dust-proof plate through holes 30 are arranged corresponding to the shell through holes 41, the top of the upper cover 2 is connected with the bottom of the base 6, namely, the base 6 is arranged in the accommodating groove 40, the labyrinth 5 is positioned in the accommodating groove 40, the dust-proof plate through holes 30 and the shell through holes 41 are positioned at the same angle in the circumferential direction of the dust-proof plate 3, at the moment, one shell through hole 41 can simultaneously correspond to the plurality of dust-proof plate through holes 30, the density of the housing through holes 41 in the housing 4 is reduced, the surface area of a single through hole is increased, and the smooth entrance of smoke is ensured. When fire smoke is generated, the smoke firstly flows into the smoke inlet through the shell through hole 41 on the shell 4, the smoke flows upwards along with the arc-shaped surface of the abutting part 32, then partial dust in the smoke is blocked through the dust blocking part 31, the dust in the smoke is reduced, the smoke is diffused into a smoke gathering channel formed by the dust separation plate 3, the upper cover 2 and the connecting plate 20 through the dust blocking part 31, and then the smoke flows into a smoke collecting channel formed by the dust separation plate 3 and the bottom shell 1 through the dust separation plate through hole 30, the dust in the smoke is further removed through the dust separation plate 3, the dust entering a labyrinth is reduced, and the detection accuracy of the detector is improved. When the smoke reaches a certain concentration in the smoke collecting channel, the smoke is diffused into the labyrinth and reaches the optical sensitive area of the labyrinth, and then smoothly flows out of the detector through the flow channel structure on the other side, so that the detector is prevented from being in a smoke sensing state all the time. When the detector is in a dust environment, the labyrinth 5 is not directly contacted with the external dust environment, the dust-containing airflow firstly passes through the dust blocking part 31 to prevent part of dust from entering a smoke gathering channel along with the airflow, and then passes through the dust separation plate 3 to further reduce dust of the dust-containing airflow so as to prevent more dust from entering the labyrinth along with the airflow and polluting the labyrinth.
Further improvement, as shown in fig. 1 to 3 and 6, an upper cover baffle 21 corresponding to the dust blocking portion 31 and surrounding the inner ring of the upper cover 2 is vertically and downwardly extended from the inner edge of the bottom of the upper cover 2, the upper cover baffle 21 blocks the smoke entering the smoke collecting channel formed by the dust separating plate 3 and the upper cover 2, the flow speed of the smoke is slowed down, the flow direction of the smoke is changed, the collection of the smoke is facilitated, and meanwhile, the effect of removing part of dust in the smoke can be achieved. The height of the dust blocking part 31 is smaller than that of the upper cover baffle 21, and the sum of the heights of the dust blocking part and the upper cover baffle is not larger than the distance from the bottom of the upper cover 2 to the top of the dust separation plate 3, so that the flow of smoke cannot be influenced when dust in the smoke is blocked by the dust blocking part 31, and the smoke can smoothly enter the smoke gathering channel.
In a further improvement, as shown in fig. 1 to 3 and 6, the radial length of the connecting plate 20 is not less than the thickness of the ring of the upper cover 2, which means that the connecting plate 20 completely separates two adjacent dust separation plate through holes 30, and the two adjacent dust separation plate through holes 30 are not communicated between the dust collecting channels, so that the smoke can be gathered to form a concentration gradient, and the flow of the smoke between the smoke collecting channels and the smoke collecting channels is facilitated.
In a further improvement, as shown in fig. 7, 8 through holes 30 of the dust-separation plate are arranged at equal intervals, so that 8 smoke flow channels are formed, and the orientation requirement of the detector is met.
In a further improvement, as shown in fig. 5, a plurality of bottom shell baffles 10 which are of an inverted right-angled trapezoid structure and correspond to the connecting plate 20 and separate the inner wall of the bottom shell 1 are arranged on the inner wall of the bottom shell 1, so that after the flow channel structure is mounted on the detector, the end surfaces of the bottom shell baffles 10 abut against the outer wall of the labyrinth 5, a smoke collection channel formed by the dust separation plates 3, the bottom shell 1 and the labyrinth 5 is divided into a plurality of small smoke collection areas, and the number of small smoke collection areas is formed by the number of through holes 30 of the dust separation plates, the upper part and the lower part of the space of each small smoke collection area are small, so that a smoke collection area is gradually reduced, thereby facilitating the collection of smoke at the smoke collection area, further facilitating the formation of a smoke concentration difference between the smoke collection channel and the labyrinth, facilitating the smoke to enter the labyrinth, and enabling the detection of the labyrinth to be more accurate.
In a further improvement, as shown in fig. 5, the bottom surface of the bottom shell 1 is provided with a bottom shell through hole 11, which facilitates the installation of other components in the detector when the bottom shell 1 is installed in the shell 4 of the detector.
In a further improvement, as shown in fig. 1, the base 6 is connected to the sidewall of the containing groove 40 at the sidewall, so that the containing groove 40 is closed and pulled by the base 6, thereby making the whole product more compact in structure and facilitating the installation thereof.
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 flow channel structure of a smoke detector with dustproof performance is characterized by comprising a bottom shell and an annular upper cover, wherein the top of the bottom shell is provided with an inverted frustum-shaped groove, and an annular dust separation plate is arranged between the bottom shell and the upper cover; a plurality of dust separation plate through holes penetrating through the upper surface and the lower surface of the dust separation plate are arranged on the dust separation plate at intervals along the circumferential direction, a dust blocking part surrounding the dust separation plate for one circle extends upwards and vertically from the outer edge of the upper surface of the dust separation plate, and an inwards concave arc-shaped abutting part extends downwards and outwards from the outer edge of the lower surface of the dust separation plate; the bottom shell is connected to the lower surface of the dust separation plate, and a plurality of connecting plates which are connected with the dust separation plate and are used for spacing the through holes of the dust separation plate are arranged at the bottom of the upper cover along the circumferential direction.
2. The flow channel structure of a smoke detector with dust-proof performance as claimed in claim 1, wherein the upper cover is vertically extended downwards at the inner edge of the bottom part and is provided with an upper cover baffle plate corresponding to the dust-proof part and surrounding the inner ring of the upper cover.
3. The flow channel structure of a smoke detector with dustproof performance as claimed in claim 2, wherein the height of the dust blocking part is less than that of the baffle of the upper cover, and the sum of the heights of the dust blocking part and the baffle of the upper cover is not more than the distance from the bottom of the upper cover to the top of the dust separation plate.
4. The flow channel structure of a smoke detector with dust-proof performance as claimed in claim 1, wherein the length of the connecting plate in the radial direction is not less than the thickness of the ring of the upper cover.
5. The flow channel structure of a smoke detector with dustproof performance as claimed in claim 1, wherein the through holes of the dust-proof plate are equally spaced by 8.
6. The flow channel structure of a smoke detector with dustproof performance as claimed in claim 1, wherein the inner wall of the bottom shell is provided with a plurality of bottom shell baffles which are in an inverted right trapezoid structure and correspond to the connecting plate and separate the inner wall of the bottom shell.
7. The flow channel structure of a smoke detector with dustproof performance as claimed in claim 1, wherein a bottom shell through hole is arranged on the bottom surface of the bottom shell.
8. The flow channel structure of a smoke detector with dustproof performance as claimed in claim 1, wherein the dust-proof plate through hole is a fan-shaped through hole.
9. A smoke detector with dustproof performance is characterized by comprising a shell, a base and a dust separation plate, wherein the upper surface of the shell is provided with a containing groove, the bottom of the base is provided with a labyrinth, a plurality of shell through holes are formed in the shell at intervals along the circumferential direction, the containing groove is internally provided with a flow channel structure according to any one of claims 1 to 8, the bottom of the bottom shell is connected to the bottom of the containing groove, the dust separation plate and an upper cover are sleeved on the outer wall of the labyrinth in a matching mode, the dust separation plate through holes are arranged corresponding to the shell through holes, and the top of the upper cover is connected to the bottom of the base.
10. The smoke detector of claim 9, wherein the base is connected to the walls of the receiving cavity at the sidewalls.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407861.8A CN113990024A (en) | 2021-11-19 | 2021-11-19 | Flow channel structure of smoke detector with dustproof performance and smoke detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407861.8A CN113990024A (en) | 2021-11-19 | 2021-11-19 | Flow channel structure of smoke detector with dustproof performance and smoke detector |
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| CN113990024A true CN113990024A (en) | 2022-01-28 |
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| CN202111407861.8A Pending CN113990024A (en) | 2021-11-19 | 2021-11-19 | Flow channel structure of smoke detector with dustproof performance and smoke detector |
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| CN112802296A (en) * | 2021-04-07 | 2021-05-14 | 南昌旭码信息科技有限公司 | Indoor fire alarm sensing device |
| CN214670980U (en) * | 2021-04-20 | 2021-11-09 | 张章 | Smoke induction device convenient for dust prevention for emergency management |
| CN216388292U (en) * | 2021-11-19 | 2022-04-26 | 深圳市高新投三江电子股份有限公司 | Flow channel structure of smoke detector with dustproof performance and smoke detector |
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Address after: 518000 the three floor of the new world apartment, Nanshan Avenue, Nanshan District, Shenzhen, Guangdong (for office only). Applicant after: Shenzhen hi tech investment Sanjiang Electronics Co.,Ltd. Address before: 518000 the three floor of the new world apartment, Nanshan Avenue, Nanshan District, Shenzhen, Guangdong (for office only). Applicant before: SHENZHEN FANHAI SANJIANG ELECTRONICS Co.,Ltd. |