Single-shot, single-receiver optical labyrinth smoke alarm

Abstract

This utility model discloses a single-transmitter, single-receiver optical labyrinth smoke detector, including a base, a top cover mounted on the base, a smoke chamber with an opening facing the base at the center of the top cover, a transmitting tube and a receiving tube facing the smoke chamber on the base, and several smoke inlets arranged circumferentially on the side wall of the top cover at the bottom of the smoke chamber. The side wall of the top cover, the inner wall of the base, and the smoke chamber form a smoke inlet channel with an optical labyrinth effect, which can effectively block external ambient light from entering the smoke chamber. The internal light trap design effectively improves the sensitivity and stability of the smoke detector.

Description

Technical Field

[0001] This utility model relates to the field of fire smoke alarms, and in particular to a single-electrode, single-receiver optical labyrinth smoke alarm. Background Technology

[0002] In the field of fire safety protection, smoke detectors, as key equipment for early fire detection and protecting the lives and property of people, have been widely used in various scenarios such as residences, dormitories, rental houses, small commercial places and elderly care facilities. Among them, the vertical smoke detector with a single-electrode and single-receiver structure has become one of the mainstream products on the market due to its simple structure, low cost and convenient installation.

[0003] The received signal of a vertical smoke detector changes with the smoke concentration. When smoke appears in the environment, smoke particles scatter or absorb the light signal, causing the signal strength received by the receiver to change regularly as the smoke concentration increases. When the signal strength reaches a preset alarm threshold, the alarm triggers an audible and visual alarm to achieve smoke monitoring and early warning. However, the performance of existing smoke detectors of this type is easily affected by two key factors, resulting in significant technical limitations. First, the alarm threshold setting is directly related to the ambient light intensity. In scenarios with strong light, backlight, or frequent fluctuations in ambient light (such as near windows or areas with strong lighting), the background light can interfere with the receiver's recognition of the valid signal, causing the threshold reference to drift and leading to false alarms or missed alarms. Second, the rate of increase in smoke concentration significantly affects the timeliness of the alarm response: when the smoke concentration increases slowly, the signal change at the receiver is gradual, which may result in an alarm delay; while when the smoke concentration increases suddenly, the signal change may cause the alarm to overreact or misjudge. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a single-transmitter, single-receiver optical labyrinth smoke alarm.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A single-transmitter, single-receiver optical maze smoke alarm includes a base with a top cover mounted on it. The top cover has a smoke chamber with an opening facing the base at its center. The sidewalls and bottom of the smoke chamber are covered with serrated patterns. The sidewalls of the top cover, located at the bottom of the smoke chamber, have several smoke inlets arranged circumferentially. The sidewalls of the top cover, the inner wall of the base, and the smoke chamber form a smoke inlet channel with an optical maze effect. The base is provided with a transmitting tube and a receiving tube facing the smoke chamber.

[0007] An insect-proof net is installed on the outer side of the upper cover located at the smoke inlet.

[0008] The top of the cover extends outward with an upper limit ring, and the base is provided with a lower limit ring corresponding to the upper limit ring. The insect-proof mesh is installed between the upper limit ring and the lower limit ring.

[0009] The bottom of the side wall of the upper cover is provided with a first step, and the lower limiting ring is provided with a second step corresponding to the first step, and the first step and the second step are interlocked.

[0010] The base is provided with a plurality of mounting posts, and the upper cover is provided with mounting holes corresponding to the mounting posts, and the mounting posts are installed in the mounting holes with an interference fit.

[0011] The transmitting tube and receiving tube near the smoke chamber are elliptical in structure.

[0012] The base is equipped with support feet at its bottom.

[0013] The beneficial effects of this utility model are as follows: The utility model has a smoke chamber with an opening facing the base in the center of the top cover. The base is provided with a transmitting tube and a receiving tube facing the smoke chamber. The side wall of the top cover is located at the bottom of the smoke chamber and has several smoke inlets arranged circumferentially. The side wall of the top cover, the inner wall of the base and the smoke chamber form a smoke inlet channel with an optical labyrinth effect, which can effectively block external ambient light from entering the smoke chamber. The interior has a special light trap design, which effectively improves the sensitivity and stability of the smoke detector. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a structural diagram of the present invention;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 yes Figure 3 Enlarged view of A in the middle;

[0019] Figure 5 This is a structural diagram of the top cover;

[0020] Figure 6 This is a structural diagram of the base;

[0021] Figure 7 This is a schematic diagram of the first installation method of this utility model;

[0022] Figure 8 This is a schematic diagram of the second installation method of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0025] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0026] Reference Figure 1-8 A single-emitter, single-receiver optical maze smoke alarm includes a base 1, on which a top cover 2 is mounted. The top cover 2 has a smoke chamber 3 with an opening facing the base 1 at its center. A transmitter 7 and a receiver 8 are mounted on the base 1, facing the smoke chamber 3. Both the transmitter 7 and receiver 8 are located below the bottom plane of the base 1, forming a vertical structure. The sidewall of the top cover 2, located at the bottom of the smoke chamber 3, has several smoke inlets 4 arranged circumferentially. The sidewall of the top cover 2, the inner wall of the base 1, and the smoke chamber 3 form a smoke inlet channel 5 with an optical maze effect. This effectively blocks ambient light (such as strong light or backlight) from entering the smoke chamber 3 while ensuring that smoke enters the smoke chamber smoothly and evenly (e.g., light from external sources). Figure 3 As shown in B in the diagram, which represents the entry path of the smoke, the sidewalls and bottom of the smoke chamber 3 are covered with serrated patterns 6 (serrated patterns are also known as optical trap design in the industry), which effectively improves the sensitivity and stability of the smoke detector.

[0027] The upper cover 2 is equipped with an insect-proof net 9 on the outside of the smoke inlet 4, which can effectively block flying insects from entering the alarm and prevent flying insects from interfering with the optical path structure and signal reception or damaging internal components, thus extending the product's service life.

[0028] The top of the upper cover 2 extends outward with an upper limit ring 10, and the base 1 is provided with a lower limit ring 11 corresponding to the upper limit ring 10. The insect net 9 is fastened between the upper limit ring 10 and the lower limit ring 11 to facilitate the quick fastening and fixing of the insect net 9.

[0029] The bottom side wall of the upper cover 2 is provided with a first step 12, and the lower limiting ring 11 is provided with a second step 13 corresponding to the first step 12. The first step 12 and the second step 13 are interlocked with each other. The base 1 is provided with a plurality of mounting posts 14, and the upper cover 2 is provided with mounting holes 15 corresponding to the mounting posts 14. The mounting posts 14 are interference-fitted into the mounting holes 15. The assembly structure is simple, the assembly method is optimized, and the assembly efficiency is improved.

[0030] The transmitting tube 7 and receiving tube 8 are elliptical structures near the smoke chamber 3 (e.g., ...). Figure 6 As shown in C), this elliptical optical path structure has a good focusing effect, which can focus the light signal emitted by the transmitting tube 7 onto the smoke particles. At the same time, it efficiently collects the light signal scattered / reflected by the smoke particles and transmits it to the receiving tube 8, which greatly improves the light signal intensity obtained by the receiving tube 8 when smoke enters. This design effectively solves the problem of response lag caused by weak signals in traditional alarms. Especially for scenarios where the smoke concentration rises slowly, it can more sensitively capture signal changes and ensure the timeliness of alarm response.

[0031] refer to Figure 8 The base 1 has a support foot 16 at its bottom. When the product is installed on a control board 17 that does not have holes to accommodate the transmitting tube 7 and the receiving tube 8, the support foot 16 is needed to support the product.

[0032] refer to Figure 7 When this product is installed on the control plate 17 which has holes for accommodating the transmitting tube 7 and the receiving tube 8, the product can be fixed by the cooperation of the transmitting tube 7 and the receiving tube 8 with the holes, and the product does not need to be supported by the support foot 16.

[0033] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A single-transmitter, single-receiver optical labyrinth smoke alarm, comprising a base (1), wherein a top cover (2) is mounted on the base (1), characterized in that... The upper cover (2) has a smoke chamber (3) with an opening facing the base (1) at its center. The sidewalls and bottom of the smoke chamber (3) are covered with serrated patterns (6). The sidewalls of the upper cover (2) are located at the bottom of the smoke chamber (3) and have several smoke inlets (4) arranged circumferentially. The sidewalls of the upper cover (2), the inner wall of the base (1), and the smoke chamber (3) form a smoke inlet channel (5) with an optical maze effect. The base (1) is provided with a transmitting tube (7) and a receiving tube (8) facing the smoke chamber (3).

2. The single-transmitter, single-receiver optical labyrinth smoke alarm according to claim 1, characterized in that... The top cover (2) is fitted with an insect-proof net (9) on the outside of the smoke inlet (4).

3. The single-transmitter, single-receiver optical labyrinth smoke alarm according to claim 2, characterized in that... The top of the cover (2) extends outward with an upper limit ring (10), and the base (1) is provided with a lower limit ring (11) corresponding to the upper limit ring (10). The insect net (9) is fitted between the upper limit ring (10) and the lower limit ring (11).

4. The single-transmitter, single-receiver optical labyrinth smoke alarm according to claim 3, characterized in that... The bottom of the side wall of the upper cover (2) is provided with a first step (12), and the lower limiting ring (11) is provided with a second step (13) corresponding to the first step (12). The first step (12) and the second step (13) are interlocked.

5. The single-transmitter, single-receiver optical labyrinth smoke alarm according to claim 1, characterized in that... The base (1) is provided with a plurality of mounting posts (14), and the upper cover (2) is provided with mounting holes (15) corresponding to the mounting posts (14), and the mounting posts (14) are installed in the mounting holes (15) with an interference fit.

6. The single-transmitter, single-receiver optical labyrinth smoke alarm according to claim 1, characterized in that... The transmitting tube (7) and receiving tube (8) near the smoke chamber (3) are elliptical in structure.

7. The single-transmitter, single-receiver optical labyrinth smoke alarm according to claim 1, characterized in that... The base (1) is provided with a support foot (16) at its bottom.

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