A bidirectional push-in ceiling type smoke detector and a smoke entering method thereof

Abstract

The application discloses a bidirectional forced top type smoke inlet detector, which mainly solves the problems of slow smoke inlet speed and slow alarm speed of the existing smoke detector. The smoke detector comprises a top cover, a middle disc, a circuit board and a base, the top cover is buckled on the middle disc, the circular table is buckled with the base, the bottom edge of the bowl-shaped smoke inlet area is leveled with the top edge of the base after buckling, and the whole detector presents a shape of large at the top and bottom and small in the middle, the sidewall of the smoke inlet area is provided with a plurality of smoke inlets, and the circuit board is installed on the inner bottom of the circular table. Through the above design, the problems of slow smoke inlet speed and uneven smoke inlet can be solved, the smoke in the smoke inlet area of the detector can repeatedly move to quickly enter the smoke sensing labyrinth, the smoke particles can enter from all directions of the smoke inlet area without dead angle when diffusing, the smoke particles can quickly enter the labyrinth, the problems of slow alarm speed, false alarm and the like can be effectively solved, and the smoke sensing sensitivity of the detector is improved.

Description

Technical Field

[0001] This invention belongs to the field of fire protection equipment safety technology, specifically, it relates to a two-way approach top-mounted smoke detector and its smoke intake method. Background Technology

[0002] With the rapid development of society, the application of fire protection systems has become increasingly widespread in recent years. Smoke detectors are the most widely used devices in fire alarm systems, primarily achieving fire prevention by monitoring the smoke concentration in the environment. Therefore, the design requirements for their smoke intake structure are very high. Most existing smoke detectors adopt a top-mounted smoke intake structure, with a flat top surface and smoke inlets on the side of the top cover. Smoke enters the smoke labyrinth through these side inlets. This design not only results in a slow smoke intake speed but also uneven smoke intake from various directions, leading to poor overall smoke detector positioning and the risk of slow alarm response, false alarms, or even no alarm at all. Summary of the Invention

[0003] The purpose of this invention is to provide a bidirectional, top-mounted smoke detector, which mainly solves the problems of slow smoke entry speed and slow alarm response speed of existing smoke detectors.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A bidirectional, top-mounted smoke detector includes a top cover, a middle plate, a circuit board, and a base. The top cover is fastened to the middle plate; the circuit board is installed inside the middle plate; the middle plate includes a lower frustum and an upper bowl-shaped smoke inlet area that gradually expands upwards; the base is a hollow disc structure that gradually expands downwards from the top; the frustum is fastened to the base, and after fastening, the bottom edge of the bowl-shaped smoke inlet area is flush with the top edge of the base, giving the entire detector a shape that is large at the top and bottom and small in the middle; the sidewall of the smoke inlet area has several smoke inlets, and the circuit board is installed on the bottom inner side of the frustum.

[0006] Furthermore, in this invention, the outer wall of the frustum is provided with a plurality of screw grooves, and the inner wall of the base is provided with a first buckle for fitting with the screw grooves.

[0007] Furthermore, in this invention, a semi-circular smoke-sensing maze is provided on the bottom inner side of the truncated cone, the circuit board is installed on the opposite side of the smoke-sensing maze, and a maze cover is fastened to the smoke-sensing maze.

[0008] Furthermore, in this invention, the inner edge of the upper cover is provided with a slot, and the upper edge of the bowl-shaped smoke inlet area of ​​the middle plate is provided with a second buckle that matches the slot.

[0009] Based on the above-mentioned smoke detector, the present invention also provides a bidirectional approach smoke entry method for a smoke detector, comprising the following steps:

[0010] (S1) When a fire occurs, smoke particles first spread from inside the house to the roof. After the smoke rises, it reaches the surface of the roof and is blocked by the roof. It then continues to spread upward from all sides of the roof.

[0011] (S2) When the smoke particles diffuse through the smoke inlet area of ​​the middle plate, some of the smoke particles enter the interior of the middle plate through the smoke inlet on the side wall of the smoke inlet area.

[0012] (S3) Another part of the smoke particles continue to move upward and reach the base. After being blocked by the base, the smoke particles move downward in the opposite direction. At this time, the smoke particles moving in the opposite direction diffuse and enter the middle plate through the smoke inlet on the side wall of the smoke inlet area.

[0013] (S4) A very small number of smoke particles continue to move downwards, reach the area where the middle plate and the top cover are fastened, are blocked and diffuse, and enter the interior of the middle plate through the smoke inlet on the side wall of the smoke inlet area.

[0014] (S5) The smoke spreads repeatedly and quickly and evenly into the middle plate.

[0015] (S6) After the smoke particles enter the interior of the central plate, they enter the smoke-sensing labyrinth from bottom to top under the action of the labyrinth cover.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) This invention sets the middle plate as a bowl-shaped structure. After the truncated cone of the middle plate is fastened to the base, the bottom edge of the bowl-shaped smoke inlet area is flush with the top edge of the base. The entire detector presents a shape that is large at the top and bottom and small in the middle. This unique structural design can solve the problems of slow smoke inlet speed and uneven smoke inlet. The smoke can quickly enter the smoke-sensing maze by repeatedly moving in the smoke inlet area of ​​the detector. When the smoke particles diffuse, they can enter from all directions of the smoke inlet area without dead angles, so that the smoke particles can quickly enter the maze. This can effectively solve the problems of slow alarm speed and false alarm, and improve the smoke sensitivity of the detector.

[0018] (2) The present invention abandons the traditional circular maze structure by setting the smoke-sensing maze in a semi-circular shape. It uses the maze cover and the smoke-sensing maze to form a closed smoke-sensing dark chamber, which makes it easier for the middle plate to be formed by mold and saves costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the exploded structure of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the middle plate in this invention.

[0022] Figure 4 This is a schematic diagram of the structure of the upper cover in this invention.

[0023] Figure 5 This is a schematic diagram of smoke particle diffusion in an embodiment of the present invention.

[0024] The names corresponding to the reference numerals in the attached figures are as follows:

[0025] 1-Top cover, 2-Middle plate, 3-Circuit board, 4-Base, 5-Frustum, 6-Bowl-shaped smoke inlet area, 7-Smoke inlet, 8-Screw fastener groove, 9-First buckle, 10-Smoke-sensing maze, 11-Maze cover, 12-Slot, 13-Second buckle. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0027] Example

[0028] like Figures 1-4 As shown, the present invention discloses a bidirectional, top-mounted smoke detector, comprising an upper cover 1, a middle plate 2, a circuit board 3, and a base 4. The upper cover 1 is fastened to the middle plate 2; the circuit board 3 is installed inside the middle plate 2; the middle plate 2 includes a lower half of a frustum 5 and an upper half of a bowl-shaped smoke inlet area 6 that gradually expands upwards; the base 4 is a hollow disc structure that gradually expands downwards from the top; the frustum 5 is fastened to the base 4, and after fastening, the bottom edge of the bowl-shaped smoke inlet area 6 is flush with the top edge of the base 4, and the entire detector presents a shape that is large at the top and bottom and small in the middle; the side wall of the smoke inlet area 6 has several smoke inlets 7, and the circuit board 3 is installed on the bottom inner side of the frustum 5.

[0029] In this embodiment, the outer wall of the frustum 5 is provided with a plurality of screw-locking grooves 8, and the inner wall of the base 4 is provided with a first buckle 9 for fitting with the screw-locking grooves 8. When connecting the middle plate to the base, the screw-locking grooves 8 and the first buckle 9 are rotated and fastened together.

[0030] In this embodiment, a semi-circular smoke-detecting maze 10 is provided on the inner bottom of the truncated cone 5. The circuit board 3 is installed on the opposite side of the smoke-detecting maze 10, and a maze cover 11 is fastened to the smoke-detecting maze 10. The photoelectric emitting unit and the photoelectric receiving unit in the circuit board are respectively installed at the two ends of the semi-circular smoke-detecting maze. The light emitted by the photoelectric emitting unit is reflected within the maze body, and the smoke is detected by the photoelectric receiving unit. By adopting a semi-circular smoke-detecting maze, the traditional circular smoke-detecting maze structure is abandoned. The maze cover is fastened to the smoke-detecting maze to form a closed smoke-detecting dark chamber, which facilitates the molding of the middle plate and saves costs.

[0031] In this embodiment, the inner edge of the upper cover 1 is provided with a slot 12, and the upper edge of the bowl-shaped smoke inlet area of ​​the middle plate 2 is provided with a second buckle 13 that matches the slot 12. After the labyrinth cover 11 is fastened onto the middle plate, the middle plate and the upper cover are fastened together, so that the second buckle 13 can be inserted into the slot 12.

[0032] like Figure 5 As shown, when a fire occurs, the trajectory of smoke particles around the detector is as follows:

[0033] 1. Smoke particles first diffuse from inside the house to the roof. After rising, the smoke reaches the surface of the roof and is blocked by the roof. It then continues to diffuse upwards from all sides of the roof.

[0034] 2. When the smoke particles diffuse through the central smoke inlet area, some of the smoke particles enter the maze through the smoke inlet on the side wall of the smoke inlet area.

[0035] 3. Another part of the smoke particles continue to move upwards and reach the base. After being blocked by the base, the smoke particles move downwards in the opposite direction. At this time, the smoke particles diffuse and enter the maze through the smoke inlet on the side wall of the smoke inlet area.

[0036] 4. A very small number of smoke particles continue to move downwards, reaching the area where the middle plate and the top cover are fastened together. They are blocked and diffuse, then enter the interior of the maze through the smoke inlet on the side wall of the smoke inlet area.

[0037] 5. The smoke spreads and diffuses repeatedly, allowing it to quickly and evenly penetrate the maze.

[0038] 6. After the smoke particles enter the middle plate, they enter the smoke-sensing labyrinth from bottom to top under the action of the labyrinth cover.

[0039] Through the above design, this invention solves the problems of slow smoke intake speed and uneven smoke intake. The smoke, moving repeatedly within the smoke intake area of ​​the detector, can quickly enter the smoke-detecting maze. As smoke particles diffuse, they can enter from all directions within the smoke intake area without blind spots, allowing them to quickly enter the maze. This effectively solves problems such as slow alarm speed and false alarms, improving the smoke detection sensitivity of the detector. Therefore, compared with existing technologies, this invention has substantial features and advancements.

[0040] The above embodiments are merely one of the preferred embodiments of the present invention and should not be used to limit the scope of protection of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but solve the same technical problem as the present invention, should be included within the scope of protection of the present invention.

Claims

1. A bidirectional, top-mounted smoke detector, comprising an upper cover (1), a middle plate (2), a circuit board (3), and a base (4), wherein the upper cover (1) is fastened to the middle plate (2); the circuit board (3) is installed inside the middle plate (2); characterized in that, The middle plate (2) includes a lower half of a frustum (5) and an upper half of a bowl-shaped smoke inlet area (6) that gradually expands upwards; the base (4) is a hollow disc structure that gradually expands downwards from the top; the frustum (5) is fastened to the base (4), and after the fastening is completed, the bottom edge of the bowl-shaped smoke inlet area (6) is flush with the top edge of the base (4), and the entire detector presents a shape that is large at the top and bottom and small in the middle; the side wall of the smoke inlet area (6) is provided with several smoke inlets (7), and the circuit board (3) is installed on the bottom of the inner side of the frustum (5); A semi-circular smoke-sensing maze (10) is provided on the bottom inner side of the truncated cone (5). The circuit board (3) is installed on the opposite side of the smoke-sensing maze (10). A maze cover (11) is fastened to the smoke-sensing maze (10).

2. The bidirectional approach top-type smoke detector according to claim 1, characterized in that, The outer wall of the truncated cone (5) is provided with several screw grooves (8), and the inner wall of the base (4) is provided with a first buckle (9) for matching the screw grooves (8).

3. A bidirectional approach top-mounted smoke detector according to claim 2, characterized in that, The inner edge of the top cover (1) is provided with a slot (12), and the upper edge of the bowl-shaped smoke inlet area of ​​the middle plate (2) is provided with a second buckle (13) that is adapted to the slot (12).

4. A bidirectional, top-mounted smoke inlet method for a smoke inlet detector, characterized in that, The smoke detector as described in claim 3 is used, comprising the following steps: (S1) When a fire occurs, smoke particles first spread from inside the house to the roof. After the smoke rises, it reaches the surface of the roof and is blocked by the roof. It then continues to spread upward from all sides of the roof. (S2) When the smoke particles diffuse through the smoke inlet area of ​​the middle plate, some of the smoke particles enter the interior of the middle plate through the smoke inlet on the side wall of the smoke inlet area; (S3) Another part of the smoke particles continue to move upward and reach the base. After being blocked by the base, the smoke particles move downward in the opposite direction. At this time, the smoke particles moving in the opposite direction diffuse and enter the middle plate through the smoke inlet on the side wall of the smoke inlet area. (S4) A very small number of smoke particles continue to move downwards, reach the area where the middle plate and the top cover are fastened, are blocked and diffuse, and enter the interior of the middle plate through the smoke inlet on the side wall of the smoke inlet area. (S5) The smoke spreads repeatedly and quickly and evenly into the middle plate; (S6) After the smoke particles enter the interior of the central plate, they enter the smoke-sensing labyrinth from bottom to top under the action of the labyrinth cover.

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