A smoke sensor, housing, and smoke alarm device
By designing an insect-proof mesh cover and smoke-inlet ribs on the smoke sensor housing, the problem of the smoke sensor's smoke-inlet blind zone is solved, enabling all-round smoke detection, improving detection accuracy and efficiency, while simplifying the structure and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SITERWELL ELECTRONICS CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-03
AI Technical Summary
Existing smoke sensors have blind spots, resulting in incomplete smoke detection and affecting detection accuracy and efficiency.
A smoke sensor housing was designed, including a cover, a base, and a first insect-proof mesh cover. The insect-proof mesh cover has multiple smoke inlet holes that extend around the perimeter of the housing. Combined with smoke inlet ribs, it forms a 360° smoke inlet channel without blind spots, blocking ambient light interference, simplifying the structure, and reducing costs.
This technology enables 360° smoke detection without blind spots, improving smoke detection accuracy and efficiency, reducing noise signals, simplifying manufacturing, and lowering costs.
Smart Images
Figure CN224457453U_ABST
Abstract
Description
Technical Field
[0001] This application relates to smoke alarm devices, and more particularly to a smoke sensor, housing, and smoke alarm device. Background Technology
[0002] Smoke alarm devices are usually equipped with smoke sensors. When there is a fire source in the environment where the smoke alarm device is located and smoke is generated, the smoke will enter the smoke sensor. After the smoke sensor detects the smoke, the alarm in the smoke alarm device will sound an alarm to remind people to extinguish the fire source in time and avoid property damage.
[0003] A smoke sensor is known to include a cover and a base, which are connected to form the main structure of the smoke sensor. When smoke is generated, it enters the smoke sensor through its side. In practice, to mitigate the possibility of insects entering the smoke sensor through its side and causing false alarms, an insect-proof mesh cover is installed on the side of the smoke sensor. This mesh cover has multiple smoke inlet holes, allowing smoke to enter the smoke sensor while preventing insects from doing so.
[0004] However, in practice, after the cover and base are connected, a blocking area is formed at the snap-fit connection. Therefore, smoke entering the smoke alarm is blocked by this area, preventing the smoke sensor from achieving 360-degree omnidirectional smoke intake, thus affecting the smoke sensor's smoke detection and failing to meet the requirement of non-directional smoke intake. Utility Model Content
[0005] This application aims to provide a smoke sensor, housing, and smoke alarm device, which can alleviate the blind spot of smoke in the smoke sensor and improve the detection accuracy of the smoke sensor.
[0006] In a first aspect, a smoke sensor housing includes a cover, a base, and a first insect-proof mesh cover extending around the periphery of the housing between the cover and the base. The top of the first insect-proof mesh cover is connected to the cover, and the bottom of the first insect-proof mesh cover has a plurality of first connectors, each of which is connected to a corresponding one of a plurality of second connectors on the base. The housing also includes a plurality of mounting cavities, each for mounting a transmitter or receiver. The first insect-proof mesh cover includes a first region located between adjacent first connectors, a second region located between the top of each first connector and the cover, and a plurality of first smoke inlets distributed on the first and second regions.
[0007] In a second aspect, a smoke sensor includes the smoke sensor housing described above, and at least one transmitter and at least one receiver disposed within a mounting cavity in the housing.
[0008] First smoke inlet holes are distributed across all first and second zones, thus providing 360° smoke entry without blind spots across the entire first insect-proof mesh cover. A smoke entry blind spot exists when smoke can only enter the smoke sensor from outside its designated blind spot, resulting in directional smoke entry. This design solves the problem, allowing smoke to enter the smoke sensor from any direction, thus eliminating directional limitations. When the smoke sensor has no blind spot, its smoke entry area is larger, with less obstruction, allowing smoke to enter more smoothly and quickly, and enabling faster smoke detection and higher efficiency. Furthermore, when the smoke concentration inside the smoke sensor reaches a preset threshold, an alarm is triggered. Due to the larger smoke entry area, the smoke concentration inside the sensor more closely approximates the ambient smoke concentration, resulting in higher smoke detection accuracy.
[0009] Multiple smoke inlet ribs are arrayed around the circumferential sidewalls inside the shell, and a smoke inlet channel is formed between each pair of adjacent smoke inlet ribs.
[0010] The smoke inlet ribs can block ambient light from entering the smoke sensor and causing interference, and guide the smoke so that the smoke can enter the central area of the smoke sensor more quickly.
[0011] Each smoke inlet rib includes a first end and a second end connected by a first bend; the first end, the first bend, and the second end form a receiving space; the first bend of one smoke inlet rib extends into the receiving space of the adjacent smoke inlet rib.
[0012] Smoke inlet ribs are provided inside the housing, and the first bend of one smoke inlet rib extends into the receiving space of the adjacent smoke inlet rib. When ambient light shines into the smoke sensor, the first bend of the smoke inlet rib can block the ambient light and reflect it onto the adjacent smoke inlet rib. This avoids the problem of ambient light passing straight through and entering the detection area of the smoke sensor, which would increase the noise signal and improve the detection accuracy of the smoke sensor.
[0013] The first end is closer to the central area of the shell, and the second end is further away from the central area of the shell. The second end of each smoke inlet rib is connected to the side wall of the first insect-proof mesh cover to define a plurality of first smoke inlet holes.
[0014] The first insect-proof netting includes multiple horizontal ribs and multiple vertical ribs spaced apart. The horizontal ribs are parallel to the cover, and the vertical ribs are perpendicular to the cover. The horizontal and vertical ribs interweave to form a mesh structure, and the second end of each smoke-inlet rib is located between two adjacent vertical ribs.
[0015] The transverse ribs, smoke inlet ribs, and longitudinal ribs can collectively form the first smoke inlet hole. This design allows the smoke inlet ribs to also function as longitudinal ribs, thereby reducing the total number of longitudinal ribs, lowering the manufacturing cost and difficulty of the smoke sensor, simplifying its structure, and making it more compact. Simultaneously, it enables the smoke inlet ribs to perform multiple functions.
[0016] When the first connector and the second connector are connected, the second connector extends into the housing; each smoke inlet rib is connected to the cover and / or the first insect-proof net cover, and the bottom of each smoke inlet rib in the second area is located above the second connector.
[0017] The smoke inlet rib is connected to the cover and / or the first insect-proof mesh cover, and the smoke inlet rib is located inside the housing. This means that if the length of the smoke inlet rib in the second area is too long when the second connector extends into the housing, the second connector and the smoke inlet rib will interfere with each other, affecting the normal assembly of the smoke sensor. The bottom of the smoke inlet rib in the second area is located above the second connector, which effectively avoids the above problem and allows the smoke sensor to be installed normally.
[0018] The bottom of the first insect-proof net cover is provided with multiple receiving grooves, and each first connector can be located in the corresponding receiving groove.
[0019] By placing the first connector within the receiving groove, the structure of the first insect-proof mesh cover becomes more compact, reducing the overall height of the smoke sensor and better meeting design requirements to reduce the size of the smoke sensor.
[0020] Each first connector has a lug, and each second connector has an opening, with the lug engaging within the opening; or each first connector has an opening, and each second connector has a lug.
[0021] The first and second connectors are connected by a snap-fit mechanism, which is simple and facilitates the disassembly and installation of the smoke alarm. At the same time, the snap-fit connection also restricts the correct assembly of the smoke sensor, allowing for accurate assembly of the smoke sensor without the need for additional positioning structures.
[0022] The first insect-proof net cover, the cover body, and the smoke inlet ribs are integrally molded.
[0023] The one-piece molding of the first insect-proof net cover, the cover body, and the smoke inlet ribs is simple, and there is no need to assemble the cover body, the first insect-proof net cover, and the smoke inlet ribs separately, which reduces the assembly difficulty.
[0024] The first smoke inlet is a rectangular hole with a length of 2mm and a width of 0.9mm.
[0025] By setting the size of the smoke inlet, small balls with a diameter of 1.25~1.35mm can be prevented from entering the smoke sensor, and rectangular probes with a length of 2mm and a width of 1mm can be prevented from entering the smoke sensor, thus ensuring that the smoke sensor meets the standard requirements.
[0026] The smoke sensor also includes a second insect-proof mesh cover, which is placed outside the first insect-proof mesh cover. The second insect-proof mesh cover has multiple second smoke inlet holes, the diameter of which is smaller than that of the first smoke inlet hole.
[0027] A second insect-proof net is installed outside the first insect-proof net to form a double-layer insect-proof net structure. This structure only allows objects smaller than the diameter of the second smoke inlet hole to enter the smoke sensor, further reducing the possibility of mosquitoes entering the smoke sensor and improving the detection accuracy of the smoke sensor.
[0028] Thirdly, a smoke alarm device includes a smoke sensor, a controller, and an alarm, wherein the controller is connected to the smoke sensor and the alarm. Attached Figure Description
[0029] The following figures illustrate an embodiment of the smoke sensor.
[0030] Figure 1 A schematic diagram of a localized explosion of a smoke sensor. Figure 1 ;
[0031] Figure 2 Assembly diagram of the smoke sensor Figure 1 ;
[0032] Figure 3 A top view of the cover and the first insect-proof netting;
[0033] Figure 4 This is a cross-sectional view of a smoke sensor.
[0034] Figure 5 A schematic diagram showing the connection between the cover and the first insect-proof netting;
[0035] Figure 6 A schematic diagram of a localized explosion of a smoke sensor. Figure 2 ;
[0036] Figure 7 Assembly diagram of the smoke sensor Figure 2 .
[0037] Figure label:
[0038] 1-Smoke sensor; 10-Housing; 11-Cover; 12-First insect-proof mesh cover; 13-Base; 14-Smoke inlet rib; 15-Limiting protrusion; 16-Second insect-proof mesh cover; 20-Receiver; 30-Transmitter; 121-First connector; 122-Accommodating groove; 123-Opening; 124-First smoke inlet hole; 125-Transverse rib; 126-Vertical rib; 131-Second connector; 132-Leg; 133-First mounting cavity; 134-First limiting groove; 161-Second smoke inlet hole. Detailed Implementation
[0039] The terms “first,” “second,” “third,” etc., are used only to distinguish features and do not indicate a sequence number, nor do they indicate or imply relative importance.
[0040] The terms “inner,” “outer,” “left,” “right,” “upper,” “lower,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use. They are used only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.
[0041] Unless otherwise explicitly specified and limited, the terms “set up,” “install,” “connect,” and “link” should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium.
[0042] Figure 1 and Figure 2 A smoke sensor 1 is shown, comprising a housing 10, an emitter 30, and a receiver 20. The housing 10 includes a cover 11, a first insect-proof mesh 12, and a base 13. The first insect-proof mesh 12 extends around the periphery of the housing 10 between the cover 11 and the base 13. The top of the first insect-proof mesh 12 is connected to the cover 11. The bottom of the first insect-proof mesh 12 has multiple first connectors 121. The base 13 has multiple second connectors 131. Each of the multiple first connectors 121 connects to a corresponding one of the multiple second connectors 131 on the base 13; that is, the number of first connectors 121 and second connectors 131 is equal. After the first connectors 121 and second connectors 131 are connected, the cover 11, the first insect-proof mesh 12, and the base 13 constitute the housing 10. The emitter 30 and the receiver 20 are located inside the housing 10. The emitter 30 and the receiver 20 can be mounted on the cover 11, or, as... Figure 1 As shown, the transmitter 30 and receiver 20 can be mounted on the base 13.
[0043] like Figure 1 As shown, the first insect-proof net cover 12 includes a first region A located between each two adjacent first connectors 121, and the first insect-proof net cover 12 also includes a second region B located between the cover body 11 and the top of each first connector 121; a plurality of first smoke inlets 124 are distributed on the first region A and the second region B.
[0044] In one embodiment, the number of first regions A and second regions B is related to the number of first connectors 121, and the number of first regions A and second regions B is equal to the number of first connectors 121; the first regions A and second regions B together form the first insect-proof net cover 12; first smoke inlet holes 124 are distributed on all first regions A and second regions B, so that the first smoke inlet holes 124 are distributed on the entire first insect-proof net cover 12, and the smoke sensor 1 can provide 360° smoke inlet without blind spots, solving the problem of smoke sensors in the prior art.
[0045] Specifically, when a smoke sensor has a smoke ingress blind zone, smoke can only enter the smoke sensor from outside the smoke ingress blind zone, making the smoke sensor directional. The disclosed smoke sensor effectively solves this problem, allowing smoke to enter the smoke sensor 1 from any direction.
[0046] Since the smoke sensor 1 has no blind spot for smoke entry, the smoke sensor 1 has a larger smoke entry area and fewer obstacles, allowing smoke to enter the smoke sensor 1 more smoothly and quickly. The smoke sensor 1 can also detect smoke more quickly, resulting in higher detection efficiency.
[0047] The alarm will only be triggered when the smoke concentration inside smoke sensor 1 reaches a preset threshold. Because there is no blind spot and the smoke intake area is larger, the smoke concentration inside smoke sensor 1 can more closely approximate the smoke concentration in the detection environment, resulting in higher smoke detection accuracy.
[0048] The transmitter 30 may be provided, and the transmitter 30 may be a red LED tube or an infrared LED tube.
[0049] In the implementation method, such as Figure 1 As shown, there are two emitters 30, one of which can be a red LED and the other can be an infrared LED; the two emitters 30 are located at different positions within the housing 10. Having two emitters 30, and having both emitters 30 simultaneously emitting the same type of light, provides greater luminous flux, thereby improving the detection signal for smoke concentration.
[0050] The two transmitters 30 can emit light of different wavelengths simultaneously, or they can emit light of different wavelengths at different times. In this case, after receiving the light emitted by the first transmitter 30, the receiver 20 sends a first detection signal to the controller; after receiving the light emitted by the second transmitter 30, the receiver 20 sends a second detection signal to the controller. By comparing the first and second detection signals, or by using the ratio of the first and second detection signals, it can be determined whether the signal is an interference signal such as water vapor or oil fumes rather than smoke, thus improving the detection accuracy of the smoke sensor 1.
[0051] The first connector 121 and the second connector 131 can be connected by a snap-fit mechanism. For example... Figure 1 and Figure 2 As shown, each first connector 121 has an opening 123, and each second connector 131 has a lug 132. When the lug 132 is engaged in the opening 123, the first connector 121 and the second connector 131 are connected together. Alternatively, each first connector 121 may have a lug (not shown in the figure), and each second connector 131 may have an opening (not shown in the figure).
[0052] When the first connector 121 and the second connector 131 are connected by a snap-fit mechanism, the connection is simple and facilitates the disassembly and installation of the smoke sensor. At the same time, the snap-fit connection also restricts the correct assembly of the smoke sensor 1, allowing for accurate assembly of the smoke sensor 1 without the need for additional positioning structures.
[0053] Alternatively, the first connector 121 and the second connector 131 can be connected by threads. For example, the first connector 121 can be a threaded protrusion, and the second connector 131 can be provided with a threaded hole for connecting to the threaded protrusion; or, the first connector 121 can be provided with a threaded hole, and the second connector 131 can be provided with a threaded protrusion.
[0054] Alternatively, the first connector 121 and the second connector 131 can be connected by rotational locking. For example, the first connector 121 may have an arc-shaped groove, and the second connector 131 may have a locking protrusion; or, the first connector 121 may have a locking protrusion, and the second connector 131 may have an arc-shaped groove. The locking protrusion extends into the arc-shaped groove. When the component with the locking protrusion rotates a certain angle in the first direction, the locking protrusion abuts against the end of the arc-shaped groove, thus achieving the connection between the first connector 121 and the second connector 131. When the component with the locking protrusion rotates a certain angle in the opposite second direction, the locking protrusion releases its abutment against the end of the arc-shaped groove, and the connection between the first connector 121 and the second connector 131 is terminated.
[0055] like Figure 1 and Figure 2 As shown, the bottom of the first insect-proof net cover 12 is close to the base 13, and the top of the first insect-proof net cover 12 is away from the base 13. The bottom of the first insect-proof net cover 12 is provided with a plurality of receiving grooves 122, the number of receiving grooves 122 being equal to the number of first connectors 121, and each first connector 121 is located in a corresponding receiving groove 122. It is understood that, as... Figure 1 As shown, each receiving groove 122 penetrates at least a portion of the first insect-proof mesh cover 12, and the bottom of each receiving groove 122 is open. One end of the first connector 121 is connected to the groove wall of the receiving groove 122, and the other end of the first connector 121 extends out from the bottom of the receiving groove 122 toward the base 13. In addition to the receiving grooves 122, first smoke inlets 124 are distributed around the perimeter of the first insect-proof mesh cover 12.
[0056] As shown, the first connector 121 is placed within the receiving groove 122, making the structure of the first insect-proof net cover 12 more compact, reducing the overall height of the smoke sensor 1, and better meeting the design requirements to reduce the size of the smoke sensor 1. Alternatively, the receiving groove 122 may not be provided on the first insect-proof net cover 12, and the first connector 121 may be connected to the bottom edge of the first insect-proof net cover 12.
[0057] like Figure 3 As shown, multiple smoke inlet ribs 14 are arrayed on the circumferential sidewalls inside the housing 10, with each pair of adjacent smoke inlet ribs 14 forming a smoke inlet channel. Smoke enters the smoke sensor 1 through the first smoke inlet hole 124 and then enters the smoke sensor 1 through the smoke inlet channel. The smoke inlet ribs 14 serve to block ambient light from directly entering the smoke sensor 1 and causing interference, and to guide the smoke, allowing it to enter the central area of the smoke sensor 1 more quickly. For example, each smoke inlet rib 14 can be an arc-shaped structure, and multiple arc-shaped smoke inlet ribs are arrayed on the circumferential sidewalls inside the housing.
[0058] In another example, each smoke inlet rib 14 has an "L-shaped" structure. In this case, each smoke inlet rib 14 includes a first end C1, a first bend C2, and a second end C3 connected in sequence; the first end C1, the first bend C2, and the second end C3 of each smoke inlet rib 14 form a receiving space; the first bend of one smoke inlet rib 14 extends into the receiving space of the adjacent smoke inlet rib 14.
[0059] Specifically, the first end C1 is close to the central region of the housing 10, and the second end C3 is far from the central region of the housing 10. The outermost part of the first end C1 away from the first bend C2 is the first side C5, and the outermost part of the second end C3 away from the first bend C2 is the second side C6. The plane containing the first side C5 and the second side C6 is plane P1. Plane P1 and the smoke inlet rib 14 together form a receiving space, and plane P1 is the opening of the receiving space. At least a portion of the first bend of one smoke inlet rib 14 extends beyond plane P1 of the adjacent smoke inlet rib 14 and into the receiving space of the adjacent smoke inlet rib 14.
[0060] An L-shaped smoke inlet rib 14 is provided inside the housing 10, and the first bend of one smoke inlet rib 14 extends into the receiving space of the adjacent smoke inlet rib 14. When ambient light shines into the smoke sensor 1, the first bend of the smoke inlet rib 14 can block the ambient light and reflect it onto the adjacent smoke inlet rib 14. This avoids the problem of increasing noise signal due to the ambient light passing through in a straight line and entering the detection area inside the smoke sensor 1, thereby improving the detection accuracy of the smoke sensor 1.
[0061] The second end of each smoke inlet rib 14 is connected to the inner or outer sidewall of the first insect-proof mesh cover 12 to define a plurality of first smoke inlet holes 124. That is, the second end of each smoke inlet rib and the sidewall of the first insect-proof mesh cover together form a plurality of first smoke inlet holes 124. Specifically, as... Figure 5 As shown, the first insect-proof mesh cover 12 includes multiple horizontal ribs 125 and multiple vertical ribs 126 spaced apart. The horizontal ribs 125 are parallel to the cover body 11, and the vertical ribs 126 are perpendicular to the cover body 11, with one end of each vertical rib 126 connected to the cover body 11. The horizontal ribs 125 and vertical ribs 126 interweave to form a mesh structure, which includes multiple rectangular mesh openings. The second end of each smoke inlet rib 14 is located between two adjacent vertical ribs 126 and perpendicular to the cover body, dividing each rectangular mesh opening into at least two first smoke inlet holes 124.
[0062] Each longitudinal rib 126 can be connected to the inner or outer wall of the transverse rib 125; one or more smoke inlet ribs 14 can be provided between two adjacent longitudinal ribs 126. The second end of each smoke inlet rib 14 can be inclined relative to the cover.
[0063] Each transverse rib 125 is a ring-shaped structure, and the shape of each transverse rib 125 can be the same as the edge shape of the cover 11. For example, each transverse rib 125 can be a circular ring structure.
[0064] The transverse ribs 125, the smoke inlet ribs 14, and the longitudinal ribs 126 can collectively form the first smoke inlet hole 124. This arrangement allows the smoke inlet ribs 14 to also function as the longitudinal ribs 126, reducing the number of required longitudinal ribs 126, lowering the manufacturing cost and difficulty of the smoke sensor 1, simplifying its structure, and making it more compact. Simultaneously, it allows the smoke inlet ribs 14 to perform multiple functions.
[0065] The top of each smoke inlet rib 14 can also be connected to the cover 11.
[0066] In one implementation, only the top of the smoke inlet rib 14 is connected to the cover 11, and the second end of the smoke inlet rib 14 abuts against the inner wall of the first insect-proof net cover 12.
[0067] like Figure 4 As shown, the first insect-proof net cover 12, the cover body 11, and the smoke inlet ribs 14 can be integrally molded, such as by injection molding. This method enables the cover body 11, the first insect-proof net cover 12, and the smoke inlet ribs 14 to be manufactured as a single unit, which is simple to manufacture and eliminates the need to assemble the cover body 11, the first insect-proof net cover 12, and the smoke inlet ribs 14 separately, thus reducing assembly difficulty.
[0068] When the first connector 121 and the second connector 131 are connected, the second connector 131 extends into the housing 10, and the second region B is located above the second connector 131.
[0069] The smoke inlet rib 14 can be connected to the cover 11 and / or the first insect-proof mesh cover 12, and the smoke inlet rib 14 is located inside the housing 10. This means that when the second connector 131 extends into the housing 10, if the length of the smoke inlet rib 14 at the second region B is relatively long, the second connector 131 and the smoke inlet rib 14 will interfere, affecting the normal assembly of the smoke sensor 1. The bottom of the smoke inlet rib 14 at the second region B can be located above the second connector 131, which can effectively solve this problem and allow the smoke sensor 1 to be installed normally. In addition, the smoke inlet rib 14 at the second region B can also prevent ambient light from entering the smoke sensor 1 in a straight line through the second region B, reducing the noise signal caused by ambient light.
[0070] The first smoke inlet 124 can be a rectangular hole with a length of 2 mm and a width of 0.9 mm. The shape of the first smoke inlet 124 can also be a triangle, pentagon, hexagon, or other hole shapes that allow smoke to pass through.
[0071] By limiting the size of the first smoke inlet 124, small balls with a diameter of 1.25~1.35mm can be prevented from entering the smoke sensor 1, and rectangular probes with a length of 2mm and a width of 1mm can be prevented from entering the smoke sensor 1, so that the smoke sensor 1 meets the standard requirements.
[0072] like Figure 6 and Figure 7 As shown, the smoke sensor 1 may further include a second insect-proof mesh cover 16, which covers the outside of the first insect-proof mesh cover 12. The second insect-proof mesh cover 16 has a plurality of second smoke inlet holes 161, the diameter of which is smaller than the diameter of the first smoke inlet hole 124. The second insect-proof mesh cover 16 can be fitted over the first insect-proof mesh cover 12 with an interference fit, thus completing the assembly of the second insect-proof mesh cover 16 in a simpler way.
[0073] The second insect-proof net cover 16 can also be installed outside the first insect-proof net cover 12 by magnetic attraction, buckle, welding and glue connection; the shape of the second smoke inlet 161 can be rectangular, triangular, pentagonal and hexagonal or other hole shapes that allow smoke to pass through.
[0074] A second insect-proof net cover 16 is installed outside the first insect-proof net cover 12 to form a double-layer insect-proof net structure. Only objects smaller than the aperture of the second smoke inlet hole 161 can enter the smoke sensor 1, further reducing the possibility of mosquitoes or other small insects entering the smoke sensor 1 and improving the detection accuracy of the smoke sensor 1.
[0075] like Figure 1 and Figure 4 As shown, the base 13 can be provided with multiple first mounting cavities 133 corresponding to the number of transmitters 30 and receivers 20. Each transmitter 30 and each receiver 20 is installed in a first mounting cavity 133. Each first mounting cavity 133 has a first limiting groove 134 on one side. The first limiting groove 134 communicates with the corresponding first mounting cavity 133. The cover 11 is provided with multiple limiting protrusions 15. The number of limiting protrusions 15 is equal to the number of first limiting grooves 134. Each limiting protrusion 15 extends into a first limiting groove 134. Because the first limiting groove 134 is connected to the first mounting cavity 133, when the limiting protrusion 15 extends into the first limiting groove 134, it will abut against one side of the corresponding transmitter 30 or receiver 20 to limit the movement of the transmitter 30 or receiver 20; it provides support for the transmitter 30 and receiver 20, preventing them from coming out of the first mounting cavity 133, improving the structural stability of the smoke sensor 1, improving the stability of signal transmission, and improving the detection accuracy of the smoke sensor 1.
[0076] Each limiting protrusion 15 can be integrally connected with a smoke inlet rib 14 to improve structural compactness.
[0077] This disclosure also provides a smoke alarm device. The smoke alarm device includes a smoke sensor 1, a controller, and an alarm, with the controller connected to the smoke sensor 1 and the alarm. The smoke sensor 1 can be any type of smoke sensor 1 described in the above embodiments.
[0078] The controller controls the transmitter 30 to emit target-type light. Target-type light can be red visible light with a wavelength range of 620nm-750nm, or infrared light with a wavelength range of 750nm-1000nm; other wavelengths are also possible. When there is no smoke in the environment where the smoke sensor 1 is located, the emitted light is reflected or scattered by the inner wall of the housing 10 and ultimately received by the receiver 20. After receiving the light, the receiver 20 sends a detection signal to the controller, which corresponds to a first signal value. When there is smoke in the environment where the smoke sensor 1 is located, the smoke enters the smoke sensor 1 through the first smoke inlet 124. The emitted light is reflected or scattered by the smoke entering the smoke sensor 1 and ultimately received by the receiver 20. After receiving the light, the receiver 20 sends a detection signal to the controller, which corresponds to a second signal value. The second signal value is greater than the first signal value; that is, the second signal value has a certain signal increment based on the first signal value. When the controller receives the detection signal and determines that there is a signal increment, it indicates that smoke is generated in the environment where smoke sensor 1 is located. At this time, the controller will activate the alarm to alert the user to deal with the fire in time and reduce property damage.
[0079] The above are merely some non-limiting embodiments of the present invention, and various changes and modifications are possible. Within the scope of the present invention, any modifications, equivalent substitutions, improvements, etc., are permitted.
Claims
1. A smoke sensor housing characterized by, include: A cover, a base, and a first insect-proof mesh cover extending around the periphery of the housing between the cover and the base, wherein the top of the first insect-proof mesh cover is connected to the cover, and the bottom of the first insect-proof mesh cover has a plurality of first connectors, each of the plurality of first connectors being connected to a corresponding one of a plurality of second connectors on the base; and The housing contains a plurality of mounting cavities, each of which is used to mount a transmitter or a receiver. The first insect-proof net cover includes a first region located between adjacent first connectors and a second region located between the top of each first connector and the cover; a plurality of first smoke inlets are distributed on the first region and the second region.
2. The smoke sensor housing of claim 1, wherein, Multiple smoke inlet ribs are arrayed on the circumferential sidewalls inside the housing, and a smoke inlet channel is formed between each pair of adjacent smoke inlet ribs.
3. The smoke sensor housing of claim 2, wherein, The second connector extends into the housing, each smoke inlet rib is connected to the cover and / or the first insect-proof mesh cover, and the bottom of each smoke inlet rib in the second region is located above the corresponding second connector.
4. The smoke sensor housing of claim 2, wherein, The first insect-proof net cover, the cover body, and the smoke inlet ribs are integrally formed.
5. The smoke sensor housing of claim 2, wherein, Each smoke inlet rib includes a first end and a second end connected by a first bend, thereby forming a receiving space; the first bend of one smoke inlet rib extends into the receiving space of the adjacent smoke inlet rib.
6. The smoke sensor housing of claim 5, wherein, The first end is closer to the central region of the housing, and the second end is farther away from the central region of the housing; and The second end of each smoke inlet rib is connected to the side wall of the first insect-proof mesh cover to define the plurality of first smoke inlet holes.
7. The smoke sensor housing of claim 6, wherein, The first insect-proof net cover includes multiple transverse ribs parallel to the cover body and multiple longitudinal ribs perpendicular to the cover body; the transverse ribs and longitudinal ribs are interlaced to form a mesh structure, and the second end of each smoke-inlet rib is located between adjacent longitudinal ribs.
8. The smoke sensor housing of claim 1, wherein, The bottom of the first insect-proof net cover is provided with multiple receiving grooves, and each of the first connectors is located in the corresponding receiving groove.
9. The smoke sensor housing of claim 1 or 8, wherein, Each first connector is provided with a lug, and each second connector is provided with an opening, with each lug engaging in the corresponding opening; Alternatively, each first connector may have an opening, and each second connector may have a lug, with each lug engaging within the corresponding opening.
10. The smoke sensor housing of claim 1, wherein, The maximum size of the first smoke inlet is designed to prevent a ball with a diameter of 1.25-1.35 mm from passing through the first smoke inlet, and / or to prevent a rectangular probe with a length of 2 mm and a width of 1 mm from entering the interior of the smoke sensor housing through the first smoke inlet.
11. The smoke sensor housing of claim 1, wherein, The first smoke inlet is a rectangular hole with a length of 2 mm and a width of 0.9 mm.
12. A smoke sensor, comprising: The smoke sensor housing as described in any one of claims 1-11 includes at least one transmitter and at least one receiver disposed within the mounting cavity of the housing.
13. The smoke sensor of claim 12, wherein, The second insect-proof net cover is arranged outside the first insect-proof net cover, and the second insect-proof net cover comprises a plurality of second smoke inlets, the aperture of the second smoke inlets being smaller than the aperture of the first smoke inlets.
14. A smoke alarm device, characterized in that The smoke sensor as claimed in claim 12 or 13 further comprises a controller and an alarm, the controller being connected to the smoke sensor and the alarm.