US standard standalone smoke detector

Abstract

We offer easy-to-maintain, standalone smoke detectors that meet US standards. [Solution] The smoke detector comprises a removable upper case and intermediate frame, with replaceable dustproof sheets on the inner bottom and inner top surfaces of the smoke inlet passage, a mounting through-hole in the upper case, and a removable labyrinth cover assembly mounted in the mounting through-hole, and a labyrinth provided in the labyrinth cover assembly. By blocking or trapping foreign objects with the dustproof sheets, the possibility of foreign objects entering the labyrinth is reduced. During maintenance, the dustproof sheets can be replaced after removing the upper case and intermediate frame. At the same time, the labyrinth cover assembly can also be independently removed from the upper case for maintenance, thereby ensuring smoke permeability and making maintenance extremely easy.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of fire alarm devices, and more specifically, to a US-standard standalone smoke detector.

BACKGROUND ART

[0002] A smoke detector is a safety device that issues a fire alarm by monitoring changes in the smoke concentration in the environment, and its main function is to secure early response time for personnel evacuation and fire extinguishing. The configuration of a smoke detector usually includes a smoke introduction passage and a labyrinth structure. Since the conventional smoke sensing labyrinth is of a closed structure, maintenance of the labyrinth is extremely difficult. In addition, the problem of clogging of the smoke inlet frequently occurs after a certain period of use. That is, lint and fibers may pass through the smoke introduction passage of the outer casing and clog the labyrinth inlet, reducing the smoke transmittance by 40% or more. Therefore, disassembly and cleaning by a professional is required, and the user themselves cannot solve the problems of reduced sensitivity or false alarms caused by dust and dead insects. Based on such current situation, there is an urgent demand for a US-standard standalone smoke detector that is easy to maintain.

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0003] The technical problem to be solved by the present invention is to provide a US-standard standalone smoke detector in view of the above drawbacks of the prior art.

MEANS FOR SOLVING THE PROBLEMS

[0004] The technical solutions adopted by the present invention to solve this technical problem are as follows. The present invention provides a US standard standalone smoke detector comprising a removable upper case and intermediate frame, a smoke introduction passage formed between the upper case and the intermediate frame, a mounting through-hole provided in the upper case, a removable labyrinth cover assembly provided in the mounting through-hole, and a labyrinth provided in the labyrinth cover assembly.

[0005] According to the U.S. standard standalone smoke detector described in the present invention, the U.S. standard standalone smoke detector further comprises a bottom case detachably connected to the intermediate frame.

[0006] According to the US standard standalone smoke detector described in the present invention, the bottom case is provided with a main control PCBA assembly, the main control PCBA assembly is provided with a photoelectric detection unit, and the intermediate frame is provided with a through hole corresponding to the photoelectric detection unit.

[0007] According to the US standard standalone smoke detector described in the present invention, the US standard standalone smoke detector further comprises an external mounting base that is detachably connected to the bottom case.

[0008] According to the US standard standalone smoke detector described in the present invention, the bottom case is provided with a cleaning tool for cleaning the labyrinth and a storage groove for storing the cleaning tool.

[0009] According to the US standard standalone smoke detector described in the present invention, the main control PCBA assembly is provided with a detection switch for detecting whether or not the labyrinth top cover assembly has been removed.

[0010] According to the US standard standalone smoke detector described in the present invention, a replaceable dustproof sheet is provided on the inner bottom surface and / or inner top surface of the smoke inlet passage, and one or more blocking members for blocking foreign matter are provided on one side surface of the dustproof sheet.

[0011] According to the US standard independent smoke detector described in the present invention, the dustproof sheet includes a base layer on which an adhesive layer is provided on one side surface and a plurality of the shielding members are provided on the other side surface.

[0012] According to the US standard independent smoke detector described in the present invention, a pull strip is provided on the side surface of the base layer.

[0013] According to the US standard independent smoke detector described in the present invention, the adhesive layer is a residue-free adhesive layer.

[0014] According to the US standard independent smoke detector described in the present invention, the dustproof sheet is a flame-retardant dustproof sheet.

[0015] According to the US standard independent smoke detector described in the present invention, a plurality of partition plates are provided in the smoke inlet passage, the plurality of partition plates divide the smoke inlet passage into a plurality of regions, and the dustproof sheet is provided on the inner bottom surface and / or inner top surface of each of the regions.

[0016] According to the US standard independent smoke detector described in the present invention, the shut-off member is a claw.

[0017] According to the US standard standalone smoke detector described in the present invention, the labyrinth cover assembly includes a removable cover and a labyrinth cover which are connected to or integrally molded with each other, wherein the removable cover is removablely connected to the upper case and the labyrinth is provided on the labyrinth cover.

[0018] According to the US standard standalone smoke detector described in the present invention, a plurality of turnbuckles are provided on the outer surface of the removable top cover, and a swivel locking groove is provided on the inner wall of the mounting through hole that engages with the turnbuckles in a one-to-one correspondence.

[0019] According to the US standard independent smoke detector described in the present invention, a first positioning ring is provided at the lower end of the labyrinth top cover, and a first positioning step is provided in the intermediate frame for positioning the first positioning ring.

[0020] According to the US standard standalone smoke detector described in the present invention, a second positioning ring is formed on the upper end of the removable top cover, and a second positioning step for positioning the second positioning ring is provided on the inner wall of the mounting through hole.

[0021] According to the US standard independent smoke detector described in the present invention, a guide inclined surface is provided on the side surface of the second positioning step. [Effects of the Invention]

[0022] The beneficial effects of the present invention are as follows: When the smoke detector of this application is applied, the possibility of foreign matter entering the labyrinth can be reduced by blocking or adhering to foreign matter with a dustproof sheet. During maintenance, the dustproof sheet can be replaced after removing the upper case and intermediate frame. At the same time, the labyrinth top cover assembly can also be independently removed from the upper case for maintenance. This not only ensures smoke permeability but also makes maintenance extremely easy. [Brief explanation of the drawing]

[0023] To more clearly illustrate embodiments of the present invention or prior art solutions, the present invention will be further described below with reference to the drawings. The drawings below represent only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these without requiring any creative effort. [Figure 1] Figure 1 is a schematic diagram of the structure of a US standard standalone smoke detector according to a preferred embodiment of the present invention. [Figure 2] Figure 2 is an exploded view of a US standard standalone smoke detector according to a preferred embodiment of the present invention. [Figure 3]FIG. 3 is a structural schematic diagram of a labyrinth upper cover assembly of a US-standard standalone smoke detector according to a preferred embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view of the US-standard standalone smoke detector according to the preferred embodiment of the present invention. [Figure 5] FIG. 5 is a schematic diagram of the labyrinth structure of the US-standard standalone smoke detector according to the preferred embodiment of the present invention. [Figure 6] FIG. 6 is a mounting cross-sectional view of a dustproof sheet of the US-standard standalone smoke detector according to the preferred embodiment of the present invention. [Figure 7] FIG. 7 is a structural schematic diagram of the dustproof sheet of the US-standard standalone smoke detector according to the preferred embodiment of the present invention. DETAILED DESCRIPTION OF EMBODIMENTS

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following clearly and completely describes the technical solutions of the embodiments of the present invention with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] The US-standard standalone smoke detector according to the preferred embodiment of the present invention is as shown in FIG. 1, and with reference to FIG. 2 to FIG.7 together, it comprises an upper case 1 and an intermediate frame 2 which are detachably connected. The upper case 1 is provided with a mounting through hole 10, a labyrinth upper cover assembly 4 is detachably disposed in the mounting through hole 10, and the labyrinth upper cover assembly 4 is provided with a labyrinth 40. Preferably, a smoke introduction passage 3 is formed between the upper case 1 and the intermediate frame 2, and a replaceable dustproof sheet 30 is disposed on the inner bottom surface and / or the inner top surface of the smoke introduction passage 3. When the smoke detector of this invention is applied, the dustproof sheet 30 blocks or adheres to foreign objects, reducing the possibility of foreign objects entering the labyrinth. During maintenance, the dustproof sheet 30 can be replaced after removing the upper case 1 and intermediate frame 2. At the same time, the labyrinth top cover assembly 4 can also be independently removed from the upper case 1 for maintenance, which not only ensures smoke permeability but also makes maintenance extremely easy. More preferably, this application provides a standalone smoke detector compliant with the UL217 10th standard, wherein the product's case material conforms to UL94 5VA flame retardancy, a transparent test button 11 is provided on the exterior of the smoke detector, and a multi-color light is built in to indicate the status of the smoke detector product with various lights. Furthermore, due to the design of the sound outlet 12 on the case and the internal cavity, the product's alarm sound pressure meets the UL217 requirement of 3 meters ≥ 85 dB.

[0026] Preferably, the US standard standalone smoke detector further comprises a bottom case 5 detachably connected to the intermediate frame 2, the bottom case 5 housing a main control PCBA assembly 6. The main control PCBA assembly 6 is equipped with a photoelectric detection unit 60, and power can be supplied to the main control PCBA assembly 6 by providing a battery 50 in the bottom case 5. The intermediate frame 2 is provided with a through hole 20 corresponding to the photoelectric detection unit 60. In other words, the entire design is detachable and can be easily assembled. After assembly, the photoelectric detection unit 60 passes through the through hole 20 and engages with the labyrinth 40.

[0027] Preferably, a standalone smoke detector conforming to US standards further comprises a base 7 for external mounting (which may be attached using a combination of gourd-shaped holes and screws, or by adhesive bonding, and is not limited thereto) that is detachably connected to the bottom case 5, preferably using a snap-fit ​​connection, although screw connections may also be used.

[0028] Preferably, the bottom case 5 is provided with a cleaning tool 51 for cleaning the labyrinth and a storage groove 52 for storing the cleaning tool. When maintenance of the labyrinth is necessary, the cleaning tool 51 can be removed and used. Preferably, the cleaning tool is in the form of a cleaning brush.

[0029] Preferably, the main control PCBA assembly 6 is provided with a detection switch 61 that detects whether or not the labyrinth top cover assembly 4 has been removed. The detection switch 61 is provided to alert the user when the assembly is removed normally and to sound an alarm if it becomes loose unexpectedly.

[0030] Preferably, the dustproof sheet 30 includes a base layer 300 having an adhesive layer 301 on one side and a plurality of blocking members 302 (preferably using a claw structure) on the other side for blocking foreign matter, resulting in a simple structure and low maintenance costs. As can be understood, in addition to the above three layers, new functional layers can be added as needed, and solutions obtained by extending the structure of the present invention are also included within the scope of protection of the present invention.

[0031] Preferably, a pull strip 303 is provided on the side of the base layer 300, which is provided to facilitate gripping during replacement, the pull strip 303 itself does not contain adhesive, and when provided, it can be provided on any one side away from the labyrinth 40, the adhesive layer 301 is a residue-free adhesive layer, thereby avoiding the leaving of traces that would affect the subsequent replacement of the dustproof sheet 30, and the dustproof sheet 30 is a flame-retardant dustproof sheet, and safety can be improved by selecting an UL94 V0 flame retardancy level.

[0032] Preferably, the smoke inlet passage 3 is provided with a plurality of partition plates 31, which divide the smoke inlet passage 3 into a plurality of regions, and a dustproof sheet 30 is provided on the inner bottom surface and / or inner top surface of each region.

[0033] Preferably, the labyrinth lid assembly 4 includes a removable lid 41 and a labyrinth lid 42 that are connected to or integrally molded with each other, the removable lid 41 being removablely connected to the upper case 1, and the labyrinth lid 42 being provided with a labyrinth 40, and the labyrinth lid assembly 4 is composed of two parts to facilitate separate manufacturing.

[0034] Preferably, the outer surface of the removable top cover 41 is provided with a plurality of turnbuckles 410, and the inner wall of the mounting through hole 10 is provided with a swivel locking groove 100 that engages with the turnbuckles 410 in a one-to-one correspondence. By adopting such a turnbuckle design, tool-free removal can be achieved. Of course, as can be understood, the removable installation in this location can also be equally replaced using other existing structures, and solutions obtained based on such replacements are also covered within the scope of this application.

[0035] Preferably, a first positioning ring 420 is provided at the lower end of the labyrinth top cover 42, a first positioning step 21 for positioning the first positioning ring 420 is provided on the intermediate frame 2, a second positioning ring 411 is formed at the upper end of the removable top cover 41, and a second positioning step 101 for positioning the second positioning ring 411 is provided on the inner wall of the mounting through hole 10. The labyrinth is positioned between the first positioning step 21 and the second positioning step 101, and by adopting such a design, good reliability of mounting can be ensured and accuracy of the labyrinth after mounting can be ensured.

[0036] Those skilled in the art will understand that improvements or modifications can be made based on the above description, and that any such improvements and modifications should be included within the scope of the appended claims of the present invention.

Claims

1. A standalone smoke detector conforming to US standards, A standalone smoke detector conforming to US standards, comprising a removable upper case and an intermediate frame, a smoke entry passage formed between the upper case and the intermediate frame, a mounting through-hole provided in the upper case, a removable labyrinth cover assembly provided in the mounting through-hole, and a labyrinth provided in the labyrinth cover assembly.

2. The standalone smoke detector conforming to the U.S. standard according to claim 1, further comprising a bottom case detachably connected to the intermediate frame.

3. The US standard standalone smoke detector according to claim 2, characterized in that the bottom case is provided with a main control PCBA assembly, the main control PCBA assembly is provided with a photoelectric detection unit, and the intermediate frame is provided with a through hole corresponding to the photoelectric detection unit.

4. The US standard standalone smoke detector according to claim 2, further comprising an external mounting base detachably connected to the bottom case.

5. The standalone smoke detector conforming to US standards according to claim 2, characterized in that the bottom case is provided with a cleaning tool for cleaning the labyrinth and a storage groove for storing the cleaning tool.

6. The standalone smoke detector conforming to US standards according to claim 3, characterized in that the main control PCBA assembly is provided with a detection switch for detecting whether or not the labyrinth top cover assembly has been removed.

7. The US standard standalone smoke detector according to claim 1, characterized in that a replaceable dustproof sheet is provided on the inner bottom surface and / or inner top surface of the smoke introduction passage, and one or more blocking members for blocking foreign matter are provided on the surface of one side of the dustproof sheet.

8. The US standard standalone smoke detector according to claim 7, characterized in that the dustproof sheet includes a base layer on which an adhesive layer is provided on one side surface and a plurality of the shielding members are provided on the other side surface.

9. The US standard standalone smoke detector according to claim 8, characterized in that a pull strip is provided on the side surface of the base layer.

10. The standalone smoke detector conforming to US standards according to claim 8, characterized in that the adhesive layer is a residue-free adhesive layer.

11. The standalone smoke detector conforming to US standards according to claim 7, characterized in that the dustproof sheet is a flame-retardant dustproof sheet.

12. The US standard standalone smoke detector according to claim 7, characterized in that a plurality of partition plates are provided in the smoke inlet passage, the plurality of partition plates divide the smoke inlet passage into a plurality of regions, and the dustproof sheet is provided on the inner bottom surface and / or inner top surface of each of the regions.

13. The US standard standalone smoke detector according to claim 7, characterized in that the blocking member is a claw.

14. The U.S. standard standalone smoke detector according to claim 1, wherein the labyrinth cover assembly includes a removable cover and a labyrinth cover that are connected to or integrally molded with each other, the removable cover being removablely connected to the upper case, and the labyrinth being provided on the labyrinth cover.

15. The US standard standalone smoke detector according to claim 14, characterized in that a plurality of turnbuckles are provided on the outer surface of the removable top cover, and a swivel locking groove is provided on the inner wall of the mounting through hole that engages with the turnbuckles in a one-to-one correspondence.

16. The US standard standalone smoke detector according to claim 14, characterized in that a first positioning ring is provided at the lower end of the labyrinth top cover, and a first positioning step for positioning the first positioning ring is provided in the intermediate frame.

17. The US standard standalone smoke detector according to claim 14, characterized in that a second positioning ring is formed on the upper end of the removable top cover, and a second positioning step for positioning the second positioning ring is provided on the inner wall of the mounting through hole.

18. The US standard standalone smoke detector according to claim 17, characterized in that a guide inclined surface is provided on the side surface of the second positioning step.

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