Insect-proof and dust-proof smoke alarm
By designing a protective cover, insect and dust prevention net, and dust scraper motor structure on the smoke alarm, the problem of dust and flying insects entering is solved, and effective protection is achieved for the smoke inlet and speaker opening, ensuring the normal operation and service life of the equipment.
Patent Information
- Application Number
- CN202423287011.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-31
AI Technical Summary
When existing photoelectric smoke detectors are used for a long time, external dust particles and flying insects can easily enter through the smoke inlet and speaker opening, affecting the normal use of the equipment and reducing its protective performance.
A smoke alarm designed to prevent insects and dust is presented. It employs a protective cover, an insect and dust prevention net, a dust scraper motor, and a scraper structure, combined with a bottom pressure ring for sealing, to ensure the protection of the smoke inlet and speaker opening. The dust scraper motor also periodically scrapes off accumulated dust to prevent filter clogging.
It improves protection against dust particles and flying insects, ensures the normal entry of smoke and the normal sounding of alarms, and extends the service life of the equipment.
Smart Images
Figure CN223844003U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of smoke alarm technology, and in particular to a smoke alarm that is insect-proof and dust-proof. Background Technology
[0002] Smoke detectors are typically installed at the top of the ceiling, with photoelectric smoke detectors being the most common type.
[0003] The working principle of a photoelectric smoke detector is that when smoke passes through the smoke inlet on the main unit's casing, the particles in the smoke scatter the light emitted by the LED light source. At this time, the photoelectric sensor preset in the main unit's casing senses the scattered light and transmits the signal to the preset alarm in the main unit's casing, achieving the effect of timely alarm.
[0004] Currently, with existing photoelectric smoke detectors, external dust particles and flying insects can directly enter the main unit's casing through the smoke inlet and speaker opening during prolonged use. This affects the normal operation of the photoelectric smoke detector and greatly reduces the protective effect of the smoke inlet and speaker opening against external dust particles and flying insects. Utility Model Content
[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing an insect-proof and dust-proof smoke alarm.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] Design an insect-proof and dust-proof smoke alarm, including a main unit housing, on which a smoke inlet and a speaker outlet are provided. The top of the main unit housing is provided with a ceiling. A protective cover is provided on the main unit housing. The protective cover is provided with an insect-proof and dust-proof net and bolts. A dust scraper motor is provided on the protective cover. The dust scraper motor is provided with a motor shaft. A dust scraper frame is provided on the motor shaft. A scraper brush is provided on the dust scraper frame. An inner cavity is provided in the protective cover.
[0008] The protective cover is equipped with a controller, and the controller is equipped with a timer and signal lines;
[0009] The main unit housing is provided with a bottom pressure ring and a support block.
[0010] Furthermore, the protective cover is a cylindrical structure that matches and covers the main unit's outer shell. There are six bolts arranged in a circle, which pass through the protective cover and the bottom pressure ring and are fixed to the ceiling.
[0011] Furthermore, the insect-proof and dust-proof netting is evenly laid along the outer sidewall of the protective cover, and the preset filter holes on the insect-proof and dust-proof netting are connected to the inner cavity of the cover.
[0012] Furthermore, the smoke inlets are arranged in a circular pattern of eighteen, the loudspeaker openings are arranged in a circular pattern of forty, and the preset filter holes on the insect-proof and dust-proof net are all horizontally aligned with the smoke inlets and loudspeaker openings.
[0013] Furthermore, the dust scraper frame has an overall L-shaped structure, the inner wall of the scraper brush is in close contact with the insect-proof and dust-proof net, and the controller is connected to the dust scraper motor via a signal line.
[0014] Furthermore, the support block is a trapezoidal structure and is located at the lower end of the main body shell, with the lower end face of the support block in contact with the central inner wall of the inner cavity of the cover.
[0015] Furthermore, the bottom pressure ring has an overall ring shape structure and is uniformly arranged along the outer side wall of the main unit housing.
[0016] The present invention provides a smoke alarm that is insect-proof and dust-proof, the advantages of which are:
[0017] 1. This utility model provides overall protection for the smoke inlet and speaker opening on the main unit's outer casing by installing a protective cover around the casing and setting an insect-proof and dust-proof net structure on the protective cover. This improves the overall protection of the smoke inlet and speaker opening of the photoelectric smoke alarm against external dust particles and flying insects.
[0018] 2. This utility model, by installing a dust scraper motor with a dust scraper frame on the protective cover, and a scraper brush on the dust scraper frame, and a controller and timer on the protective cover, effectively and completely scrapes off the dry particulate dust accumulated on the outer surface of the insect-proof and dust-proof net. This avoids the clogging of the filter pores of the insect-proof and dust-proof net by dry particulate dust after long-term use, thereby ensuring that the insect-proof and dust-proof net can normally allow external smoke to enter and that the alarm sound from the internal speaker can be emitted normally.
[0019] 3. By setting a bottom pressure ring structure on the main unit housing, this utility model further improves the compression sealing of the installation part between the protective cover and the main unit housing after the protective cover is installed and covered. Attached Figure Description
[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure protective cover of this utility model in the uninstalled state;
[0021] Figure 2 This is a three-dimensional schematic diagram of the overall structure protective cover of this utility model in its installed state;
[0022] Figure 3For the present utility model Figure 1 A three-dimensional schematic diagram of the main unit housing with a bottom pressure ring;
[0023] Figure 4 For the present utility model Figure 1 A first-person perspective stereoscopic view of a protective cover with insect-proof and dust-proof netting.
[0024] Figure 5 For the present utility model Figure 1 A second-view stereoscopic view of a protective cover with insect-proof and dust-proof netting.
[0025] Figure 6 This is a block diagram of the present invention.
[0026] In the diagram: 1 Main unit housing; 10 Bottom pressure ring; 11 Smoke inlet; 12 Speaker port; 2 Ceiling; 3 Support block; 4 Protective cover; 40 Inner cavity of the cover; 41 Insect and dustproof net; 42 Bolt; 5 Dust scraper motor; 51 Motor shaft; 6 Dust scraper frame; 61 Scraper brush; 7 Controller; 71 Timer; 72 Signal line. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0028] Reference Figure 1-6 A smoke alarm for preventing insects and dust includes a main housing 1, on which a smoke inlet 11 and a speaker outlet 12 are provided. A ceiling 2 is provided at the top of the main housing 1. A protective cover 4 is provided on the main housing 1. The protective cover 4 is provided with an insect and dust prevention net 41 and bolts 42. A dust scraper motor 5 is provided on the protective cover 4. A motor shaft 51 is provided on the dust scraper motor 5. A dust scraper frame 6 is provided on the motor shaft 51. A scraper brush 61 is provided on the dust scraper frame 6. An inner cavity 40 is provided in the protective cover 4.
[0029] The protective cover 4 is equipped with a controller 7, and the controller 7 is equipped with a timer 71 and a signal line 72;
[0030] The main unit housing 1 is provided with a bottom pressure ring 10 and a support block 3. The main unit housing 1 is a commonly used photoelectric smoke alarm. The principle is existing technology. Some existing structures are not drawn and labeled, so there is no need to elaborate.
[0031] The protective cover 4 is made of plastic steel, which is lightweight and has high strength.
[0032] The protective cover 4 is a cylindrical cover structure that matches and covers the main housing 1. There are six bolts 42 arranged in a circle. The bolts 42 pass through the protective cover 4 and the bottom pressure ring 10 and are fixed to the ceiling 2 to achieve a stable installation of the protective cover 4.
[0033] The insect and dust prevention net 41 is evenly laid along the outer side wall of the protective cover 4. The preset filter hole inner diameter of the insect and dust prevention net 41 can filter out particulate dust impurities and flying insects. The insect and dust prevention net 41 is made of polyester fiber flame retardant filter material, which is highly flame retardant and resistant to acid, alkali and salt corrosion. At the same time, it can ensure that smoke can enter and alarm sounds can be emitted.
[0034] The preset filter holes on the insect-proof and dust-proof net 41 are connected to the inner cavity 40 of the cover. The smoke inlet 11 has eighteen holes arranged in a circle, and the speaker port 12 has forty holes arranged in a circle. The preset filter holes on the insect-proof and dust-proof net 41 are all horizontally aligned with the smoke inlet 11 and the speaker port 12, so that external smoke can pass through the filter holes of the insect-proof and dust-proof net 41 and enter the smoke inlet 11. At the same time, it ensures that the alarm sound in the speaker port 12 is emitted through the filter holes of the insect-proof and dust-proof net 41.
[0035] The dust scraper 6 has an overall L-shaped structure. The inner wall of the scraper 61 is in close contact with the insect and dust prevention net 41. The scraper 61 is made of nylon material, which has a certain degree of toughness and will not scratch the insect and dust prevention net 41.
[0036] The controller 7 is connected to the dust scraper motor 5 via signal line 72. The controller 7 has a built-in PLC and the timer 71 is existing technology. It has a built-in control circuit that can make the dust scraper motor 5 start up for a period of time to scrape dust, then stop, and after a period of time, start up for a period of time again, then stop, and so on in a cycle. This is existing technology.
[0037] The support block 3 is a trapezoidal structure and is located at the lower end of the main housing 1. The lower end face of the support block 3 is pressed against the central inner wall of the inner cavity 40 of the cover. When the protective cover 4 is installed by bolts 42, the support block 3 will press against the inner wall of the inner cavity 40 of the cover, thereby improving the stability of the dust scraper motor 5 and preventing the inner cavity 40 of the cover from deforming.
[0038] The bottom pressure ring 10 has an overall ring shape and is evenly arranged along the side wall of the main housing 1. The bottom pressure ring 10 is made of NBR nitrile rubber and has a thickness of six to eight centimeters. NBR nitrile rubber has excellent high elasticity and sealing properties, and is waterproof, wear-resistant and corrosion-resistant.
[0039] A pre-drilled hole (not shown) is provided on the bottom pressure ring 10 to facilitate the passage of bolt 42.
[0040] Operating method: During installation, first, the protective cover 4 completely covers the main unit housing 1. Then, six bolts 42 are passed through the protective cover 4 and the bottom pressure ring 10, and installed with the expansion screws and matching self-tapping screws pre-installed in the ceiling 2. This achieves overall protection of the smoke inlet 11 and speaker outlet 12 on the main unit housing 1, preventing external dust particles and flying insects from entering the main unit housing 1 through the smoke inlet 11 and speaker outlet 12. This improves the overall protection of the smoke inlet 11 and speaker outlet 12 of the photoelectric smoke alarm against external dust particles and flying insects.
[0041] Furthermore, with prolonged use, dry dust particles will accumulate on the filter pores of the insect-proof and dust-proof net 41. The start and stop cycle times can be preset on the timer 71. After a period of time, the timer 71 will send a signal to the controller 7. The PLC in the controller 7 will control the start of the dust scraper motor 5, which will drive the motor shaft 51 to rotate at a constant speed. This will then drive the scraper brush 61 to rotate at a constant speed along the outer wall of the insect-proof and dust-proof net 41, effectively and completely scraping off the dry dust particles accumulated on the outer surface of the insect-proof and dust-proof net 41. This avoids clogging of the filter pores of the insect-proof and dust-proof net 41 by dry dust particles after prolonged use, thus ensuring that the insect-proof and dust-proof net 41 can normally allow external smoke to enter and that the alarm sound in the internal speaker 12 can be emitted normally.
[0042] In addition, when the protective cover 4 is installed on the main housing 1 by bolt 42, the upper end face of the protective cover 4 will be tightly pressed and fully contacted with the bottom pressure ring 10 to seal, which further improves the compression sealing of the installation part between the protective cover 4 and the main housing 1.
[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A smoke alarm that is insect-proof and dust-proof, comprising a main unit housing (1), characterized in that: The main housing (1) is provided with a smoke inlet (11) and a speaker outlet (12). The top of the main housing (1) is provided with a ceiling (2). The main housing (1) is covered with a protective cover (4). The protective cover (4) is provided with an insect-proof and dust-proof net (41) and bolts (42). The protective cover (4) is provided with a dust scraper motor (5). The dust scraper motor (5) is provided with a motor shaft (51). The motor shaft (51) is provided with a dust scraper frame (6). The dust scraper frame (6) is provided with a scraper brush (61). The protective cover (4) is provided with an inner cavity (40). The protective cover (4) is equipped with a controller (7), and the controller (7) is equipped with a timer (71) and a signal line (72). A bottom pressure ring (10) is provided on the main device housing (1), and a support block (3) is provided on the main device housing (1).
2. The smoke alarm for insect and dust prevention according to claim 1, characterized in that: The protective cover (4) is a cylindrical cover structure and is matched and connected to the main housing (1). The bolts (42) are six arranged in a circle. The bolts (42) pass through the protective cover (4) and the bottom pressure ring (10) and are fixedly installed with the ceiling (2).
3. The insect-proof and dust-proof smoke alarm according to claim 1, characterized in that: The insect-proof and dust-proof net (41) is evenly laid along the outer side wall of the protective cover (4), and the preset filter holes on the insect-proof and dust-proof net (41) are connected to the inner cavity (40) of the cover.
4. The insect-proof and dust-proof smoke alarm according to claim 1, characterized in that: The smoke inlet (11) consists of eighteen circumferentially arranged ports, and the loudspeaker port (12) consists of forty circumferentially arranged ports. The preset filter holes on the insect-proof and dust-proof net (41) are all horizontally aligned with the smoke inlet (11) and the loudspeaker port (12).
5. A smoke alarm for insect and dust prevention according to claim 1, characterized in that: The dust scraper frame (6) is L-shaped, and the inner wall of the scraper (61) is in close contact with the insect-proof and dust-proof net (41). The controller (7) is connected to the dust scraper motor (5) through the signal line (72).
6. The insect-proof and dust-proof smoke alarm according to claim 1, characterized in that: The support block (3) is a trapezoidal structure and is located at the lower end of the main body shell (1). The lower end face of the support block (3) is in contact with the central inner wall of the inner cavity (40).
7. The insect-proof and dust-proof smoke alarm according to claim 1, characterized in that: The bottom pressure ring (10) has an overall ring shape structure and is uniformly arranged along the outer wall of the main body housing (1).