Anti-interference smoke alarm
By adopting a combination of dual transmitter tubes and single receiving tubes in the smoke alarm, combined with the inner and outer ring design and smoke inlet structure, the false alarm problem caused by inaccurate smoke identification in the prior art is solved, and effective identification of different smoke types and anti-interference performance is improved.
Patent Information
- Application Number
- CN202422374793.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The existing smoke alarms are only equipped with a single infrared emitter, and cannot effectively identify the type of smoke, resulting in a high false alarm rate caused by factors such as water vapor and dust.
A combination of dual-emitting tubes (infrared and blue light) and a single receiving tube is adopted, and the diffuse reflection principle of light is used to form an inner and outer layered smoke inlet structure combined with the design of the outer ring and the inner ring. The dust is isolated through the arc-shaped air inlet channel and the smoke inlet network, and the effective identification of different smoke types is achieved.
It reduces the false alarm rate caused by non-fire smoke interference such as water vapor and dust, improves the anti-interference performance, enhances the isolation ability of dust and large foreign objects, and reduces false alarm situations.
Smart Images
Figure CN223167155U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of smoke alarms, in particular to an anti-interference smoke alarm. Background Art
[0002] A smoke alarm, also known as a fire smoke alarm, a smoke sensor, a smoke detector, etc., is a smoke detector based on the principle that smoke particles scatter, absorb (or block) light. In the existing technology, only a single infrared emitting tube and a single receiving tube are installed in the smoke alarm. The single infrared emission cannot effectively identify the type of smoke, so other factors such as water vapor and dust in the home will cause false alarms of the finished product, thus increasing the false alarm rate. For this reason, an anti-interference smoke alarm that can identify the type of smoke and reduce the false alarm rate is proposed. Summary of the Invention
[0003] The purpose of the utility model is to propose an anti-interference smoke alarm to solve the above problems.
[0004] To achieve the above purpose, the utility model provides the following technical solutions: an anti-interference smoke alarm, including a base and an upper cover installed on the base; characterized in that a dual-emitting tube and a single receiving tube for identifying smoke according to the difference between light sources are installed on the base; an outer ring and an inner ring are provided on the upper cover; a plurality of air guide plates are provided between the outer ring and the inner ring; an arc-shaped air inlet channel conducive to the entry of smoke is formed between the air guide plates; a guiding arc surface is also provided at the contact position between the base and the air guide plate; an air inlet net formed by the intersection of a plurality of annular ribs and vertical ribs is provided on the outer ring, which is the same as the arc-shaped air inlet channel.
[0005] Preferably, tooth-shaped bosses are provided in the arc-shaped air inlet channel and the inner ring.
[0006] Preferably, an installation positioning plate is provided on the upper cover; a positioning groove adapted to the installation positioning plate is provided on the base.
[0007] Preferably, a snap boss for fixing the installation positioning plate is provided in the positioning groove on the base.
[0008] Preferably, a snap groove adapted to the snap boss is provided on the installation positioning plate.
[0009] Preferably, installation limit posts for facilitating the installation of the base are symmetrically provided on the base.
[0010] Preferably, an installation limit step and a central groove are provided on the installation limit post.
[0011] Advantages of the present utility model: By using an infrared light-emitting tube and a blue light-emitting tube to emit light respectively, a single receiving tube effectively identifies different types of smoke by utilizing the principle of diffuse reflection of light and the differences between different light sources, thereby reducing false alarms caused by interference from non-fire smoke such as water vapor and dust;
[0012] By setting the upper cover to form an inner and outer layered smoke inlet with an outer ring and an inner ring, external light cannot enter the core effective areas of emission and reception during the first and second reflections, and dust cannot directly blow to the core effective areas of emission and reception, without interfering with the light, thereby effectively improving the anti-dust performance and reducing interference;
[0013] By forming arc-shaped air intake channels that are conducive to the entry of smoke between the air guide plates, and setting a guiding arc surface at the contact between the base and the air guide plates, the smoke intake trajectory is in an up-and-down arc shape, thus being more conducive to the entry of smoke into the emission and reception areas. Brief Description of the Drawings
[0014] Figure 1 is a structural schematic diagram of the present utility model.
[0015] Figure 2 is a cross-sectional view of the present utility model.
[0016] Figure 3 is a structural schematic diagram of the upper cover of the present utility model.
[0017] Figure 4 is a structural schematic diagram of the base of the present utility model.
[0018] Legend Explanation: 1. Base; 101. Guiding arc surface; 102. Positioning groove; 103. Snap boss; 104. Installation limit post; 105. Installation limit step; 106. Central groove; 2. Upper cover; 201. Outer ring; 202. Inner ring; 203. Air guide plate; 204. Arc-shaped air intake channel; 205. Smoke inlet net; 206. Tooth-shaped boss; 207. Installation positioning plate; 208. Snap groove; 3. Dual emission tube; 4. Single receiving tube. Detailed Embodiment
[0019] Next, we will further explain a smoke alarm with anti-interference according to the present utility model in conjunction with the accompanying drawings.
[0020] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.
[0021] Refer to the attached Figures 1-4As shown in the figure, in this embodiment, an anti-interference smoke alarm includes a base 1 and an upper cover 2 installed on the base 1. The feature is that a dual-emission tube 3 and a single-receiving tube 4 for identifying smoke according to the difference between light sources are installed on the base 1. The dual-emission tube 3 and the single-receiving tube 4 can be installed on the base 1 at multiple angles or vertically. An outer ring 201 and an inner ring 202 are provided on the upper cover 2. A number of air guide plates 203 are provided between the outer ring 201 and the inner ring 202. An arc-shaped air intake channel 204 that is conducive to the entry of smoke is formed between the air guide plates 203. A guiding arc surface 101 is also provided on the base 1 at the contact with the air guide plate 203. An intake smoke net 205 formed by the intersection of a number of annular ribs and vertical ribs is provided on the outer ring 201 and is the same as the arc-shaped air intake channel 204. By using the dual-emission tube 3 to emit infrared light and blue light respectively, and the single-receiving tube 4 using the principle of diffuse reflection of light, the difference in different light sources is used to effectively identify different smoke types, thereby reducing the false alarm caused by the interference of non-fire smoke such as water vapor and dust. By setting the upper cover 2 to form an inner and outer layered smoke intake with the outer ring 201 and the inner ring 202, external light cannot enter the core effective area of emission and reception during the first and second reflections, and dust cannot directly blow to the core effective area of emission and reception, which will not interfere with the light, thereby effectively improving the anti-dust performance and reducing interference. The emission light path in the core effective area cannot be thrown out of the core effective area during the first and second reflections, preventing signal attenuation. By forming an arc-shaped air intake channel 204 that is conducive to the entry of smoke between the air guide plates 203 and setting a guiding arc surface 101 on the base 1 at the contact with the air guide plate 203, the smoke intake trajectory is an upper and lower arc, which is more conducive to the entry of smoke into the core effective area of emission and reception. By providing an intake smoke net 205 on the outer ring 201 that is the same as the arc-shaped air intake channel 204 and is formed by the intersection of a number of annular ribs and vertical ribs, it is convenient for smoke to enter the smoke alarm from all directions, and the intake smoke net 205 can isolate large foreign objects such as flying insects and fluff from interfering with the internal area and causing false alarms, replacing the insect-proof net.
[0022] Refer to the appendix Figure 2 As shown in the figure, tooth-shaped bosses 206 are provided in the arc-shaped air intake channel 204 and the inner ring 202. The inner ring 202 is the core effective area. By using the tooth-shaped bosses 206 in the arc-shaped air intake channel 204 and the inner ring 202, dust and water droplets can be effectively covered and stuck from entering the core effective area, thereby reducing interference.
[0023] Refer to the appendix Figures 1-4As shown, an installation positioning plate 207 is provided on the upper cover 2; a positioning groove 102 adapted to the installation positioning plate 207 is provided on the base 1; a snap boss 103 for fixing the installation positioning plate 207 is provided in the positioning groove 102 on the base 1; a snap groove 208 adapted to the snap boss 103 is provided on the installation positioning plate 207; by installing the installation positioning plate 207 on the upper cover 2 into the positioning groove 102 on the base 1 and installing the upper cover 2 onto the base 1 along the positioning groove 102, and at the same time snapping the snap boss 103 in the positioning groove 102 into the snap groove 208 on the installation positioning plate 207, the installation of the upper cover 2 is facilitated.
[0024] Refer to the appendix Figures 1-2 As shown, installation limit posts 104 for facilitating the installation of the base 1 are symmetrically provided on the base 1; an installation limit step 105 and a central groove 106 are provided on the installation limit posts 104; by installing the installation limit posts 104 into the installation through holes on the circuit board, the two sides of the installation limit posts 104 are squeezed by the installation through holes, causing the two sides of the installation limit posts 104 to move towards the central groove 106 until one end of the installation limit posts 104 passes through the installation through holes on the circuit board, and the installation limit posts 104 reset by relying on their own elasticity without the extrusion of the installation through holes, and at the same time making the installation limit steps 105 on the installation limit posts 104 contact the other surface of the installation through holes for limiting, so as to limit and install the smoke alarm on the circuit board.
[0025] In the installation process of the present utility model, the installation positioning plate 207 on the upper cover 2 is installed into the positioning groove 102 on the base 1, and the upper cover 2 is installed onto the base 1 along the positioning groove 102. At the same time, the snap boss 103 in the positioning groove 102 is snapped into the snap groove 208 on the installation positioning plate 207 to fixedly install the upper cover 2 on the base 1.
[0026] The above embodiments are descriptions of the present utility model, not limitations on the present utility model. Any scheme obtained by simply transforming the present utility model belongs to the protection scope of the present utility model.
Claims
1. An anti-interference smoke alarm, comprising a base (1) and an upper cover (2) mounted on the base (1); characterized in that A dual-emission tube (3) and a single-receiving tube (4) for identifying smoke according to the differences between light sources are installed on the base (1); an outer ring (201) and an inner ring (202) are provided on the upper cover (2); a plurality of air guide plates (203) are provided between the outer ring (201) and the inner ring (202); arc-shaped air intake channels (204) that are conducive to the entry of smoke are formed between the air guide plates (203); a guiding arc surface (101) is also provided on the base (1) at the contact with the air guide plates (203); an air intake net (205) which is the same as the arc-shaped air intake channel (204) and is formed by the intersection of a plurality of annular ribs and vertical ribs is provided on the outer ring (201).
2. The smoke alarm with anti-interference according to claim 1, characterized in that: Tooth-shaped bosses (206) are provided in the arc-shaped air intake channels (204) and the inner ring (202).
3. The anti-interference smoke alarm according to claim 1, wherein: An installation positioning plate (207) is provided on the upper cover (2); a positioning groove (102) adapted to the installation positioning plate (207) is provided on the base (1).
4. An anti-interference smoke alarm according to claim 3, characterized in that: A snap boss (103) for fixing the installation positioning plate (207) is provided in the positioning groove (102) on the base (1).
5. The smoke alarm with anti-interference according to claim 4, characterized in that: A snap groove (208) adapted to the snap boss (103) is provided on the installation positioning plate (207).
6. The anti-interference smoke alarm according to claim 3, characterized in that: Installation limit posts (104) facilitating the installation of the base (1) are symmetrically provided on the base (1).
7. The anti-interference smoke alarm according to claim 6, characterized in that: An installation limit step (105) and a central groove (106) are provided on the installation limit posts (104).