A smoke detector with filtering function

Abstract

The utility model discloses an aspirating smoke fire detector with filtering function, relates to fire detector technical field, including the detector body, the bottom of detector body is installed with the air outlet and the air inlet, the outside installation of air inlet has the filtering mechanism, in the utility model, the locating block of fine filter plate one side inserts the inside of locating groove, and the fine filter plate is positioned, after installing the filter frame in the outside of mounting sleeve board, the top side contact of fine filter plate is pushed to the block, and fine filter plate is provided with pressure to the block, and the stable positioning of fine filter plate is kept, and the filter frame carries out the rough filter to dust, fibre, insects and other big particle impurities in the air, and fine filter plate carries out the fine filter to the dust, smoke impurity and other small dust in the air that passes, and the air cleanliness in the detector body is improved, and the false alarm or detection accuracy decline caused by impurity interference is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fire detector technology, and in particular to an aspirating smoke detector with a filtering function. Background Technology

[0002] Aspirating smoke detectors use an air sampling tube to draw air from the protected area into the detector for analysis, thereby providing early warning of fires.

[0003] For example, CN220439023U discloses an aspirating smoke detector, which includes a housing, an air outlet on the side wall of the housing with a dustproof net inside the air outlet, an air inlet pipe connected to the bottom of the housing, an annular groove on the inner wall of the air inlet pipe, and a filter plate slidably disposed in the annular groove; a smoke detector, which is disposed on the inner top wall of the housing; and an exhaust fan, which is mounted on the inner wall of the air inlet pipe and above the filter plate.

[0004] In existing technologies, aspirating smoke detectors need to filter the incoming air. However, most detectors use only a single filter, which cannot intercept fine dust and smoke-like impurities. These particles can interfere with the optical detection system after entering the detector, leading to false alarms or reduced detection accuracy and affecting the lifespan of the detector. Utility Model Content

[0005] The purpose of this invention is to solve the problem that most detectors in the existing technology only use a single filter, which allows fine dust to enter the detector and interfere with the optical detection system, resulting in false alarms or reduced detection accuracy. Therefore, this invention proposes an aspirating smoke detector with a filtering function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a smoke detector with a filtering function, comprising a detector body, an air outlet and an air inlet installed at the bottom of the detector body, a filtering mechanism installed outside the air inlet, the filtering mechanism comprising a filter frame and a mounting plate, one end of the mounting plate being fixedly connected to the bottom of the detector body, the other end of the mounting plate being sleeved with the inner ring surface of the filter frame, a fixing ring being fixedly connected inside the filter frame, a positioning groove being provided on the top side of the fixing ring, a positioning block being inserted into the positioning groove, a fine filter plate being fixedly connected to one end of the positioning block, the fine filter plate being sleeved inside the filter frame, and an inclined baffle being provided inside the mounting plate.

[0007] Preferably, the mounting plate is internally fixedly connected to a fixing plate, a telescopic rod is fixedly connected to one side of the fixing plate, a pushing block is fixedly connected to one end of the telescopic rod, and one end of the pushing block abuts against one side of the fine filter plate.

[0008] Preferably, a compression spring is sleeved on the outside of the telescopic rod, and the compression spring is disposed between the fixed plate and the push block.

[0009] Preferably, the mounting plate is externally fixedly connected to a positioning plate, and the inner ring surface of the positioning plate is fixedly connected to a sealing ring.

[0010] Preferably, the inner ring of the sealing ring is fitted onto the outer surface of the filter frame, and the top of the filter frame abuts against one side of the positioning sleeve.

[0011] Preferably, a positioning mechanism is installed on the outside of the filter frame. The positioning mechanism includes a snap-fit ​​frame, one side of which is fixedly connected to the bottom of the filter frame, and a movable frame is snapped onto the other side of the snap-fit ​​frame. One end of the movable frame is threadedly connected to a threaded rod, and one end of the threaded rod is rotatably connected to the bottom of the detector body.

[0012] Preferably, a guide rod is slidably connected to the other end of the movable frame, and one end of the guide rod is fixedly connected to the bottom of the detector body.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the positioning block on one side of the fine filter plate is inserted into the positioning groove to position the fine filter plate. After the filter frame is installed on the outside of the mounting sleeve, the pushing block contacts the top side of the fine filter plate, pushing the compression spring to compress and deform, the telescopic rod to retract, and the elastic force of the compression spring can push the pushing block to provide pressure to the fine filter plate, maintaining the stable positioning of the fine filter plate. The filter frame coarsely filters large particulate impurities such as dust, fibers, and insects in the air, while the fine filter plate finely filters fine dust such as dust and smoke-like impurities in the passing air, improving the cleanliness of the air entering the detector body and reducing false alarms or decreased detection accuracy caused by impurities.

[0015] 2. In this utility model, the top of the filter frame is inserted into the inner ring surface of the positioning sleeve plate, and the connection between the filter frame and the positioning sleeve plate is sealed by the sealing ring. Then, the threaded rod is rotated to drive the moving frame to move, so that the moving frame is inserted into the inside of the snap-fit ​​frame, providing support for the filter frame to abut against the positioning sleeve plate, and preventing the filter frame from falling off and affecting filtration. Attached Figure Description

[0016] Figure 1 This utility model provides a partial internal planar structure diagram of an aspirating smoke detector with filtering function.

[0017] Figure 2 This utility model provides a disassembly diagram of the positioning mechanism and the filtering mechanism of an aspirating smoke detector with filtering function.

[0018] Figure 3 This invention proposes an aspirating smoke detector with a filtering function. Figure 2A magnified schematic diagram of the structure at point A;

[0019] Figure 4 This invention presents a three-dimensional structural diagram of an aspirating smoke detector with a filtering function.

[0020] Legend: 1. Detector body; 2. Positioning mechanism; 21. Threaded rod; 22. Moving frame; 23. Guide rod; 24. Snap-fit ​​frame; 3. Filtering mechanism; 31. Filter frame; 32. Fixing collar; 33. Fine filter plate; 34. Fixing plate; 35. Positioning sleeve; 36. Mounting sleeve; 37. Sealing ring; 38. Positioning block; 39. Telescopic rod; 310. Compression spring; 311. Pushing block; 312. Positioning groove; 313. Slanted baffle; 4. Air outlet; 5. Air inlet. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figures 1-4 As shown, this utility model provides an aspirating smoke detector with a filtering function, including a detector body 1. An air outlet 4 and an air inlet 5 are installed at the bottom of the detector body 1. A filtering mechanism 3 is installed outside the air inlet 5. The filtering mechanism 3 includes a filter frame 31 and a mounting plate 36. One end of the mounting plate 36 is fixedly connected to the bottom of the detector body 1, and the other end of the mounting plate 36 is sleeved with the inner ring surface of the filter frame 31. A fixing collar 32 is fixedly connected inside the filter frame 31. A positioning groove 312 is formed on the top side of the fixing collar 32. An internal positioning block 38 is inserted, and a fine filter plate 33 is fixedly connected to one end of the positioning block 38. The fine filter plate 33 is sleeved inside the filter frame 31. An inclined baffle 313 is inclinedly arranged inside the mounting sleeve 36. A fixing plate 34 is fixedly connected inside the mounting sleeve 36. A telescopic rod 39 is fixedly connected to one side of the fixing plate 34. A pushing block 311 is fixedly connected to one end of the telescopic rod 39. One end of the pushing block 311 abuts against one side of the fine filter plate 33. A compression spring 310 is sleeved on the outside of the telescopic rod 39. The compression spring 310 is arranged between the fixing plate 34 and the pushing block 311.

[0024] The positioning block 38 on one side of the fine filter plate 33 is inserted into the positioning groove 312 to position the fine filter plate 33. After the filter frame 31 is installed on the outside of the mounting sleeve 36, the pushing block 311 contacts the top side of the fine filter plate 33, pushing the compression spring 310 to compress and deform, and the telescopic rod 39 to retract. The elastic force of the deformed compression spring 310 can push the pushing block 311 to provide pressure to the fine filter plate 33, thereby maintaining the stable positioning of the fine filter plate 33. The filter frame 31 can coarsely filter large particulate impurities such as dust, fibers, and insects in the air. Subsequently, the fine filter plate 33 can finely filter fine dust such as dust and smoke-like impurities in the passing air, improving the cleanliness of the air entering the detector body 1 and reducing false alarms or decreased detection accuracy caused by impurities.

[0025] Example 2: Figures 1-4 As shown, a positioning sleeve 35 is fixedly connected to the outside of the mounting sleeve 36, and a sealing ring 37 is fixedly connected to the inner ring surface of the positioning sleeve 35; the inner ring surface of the sealing ring 37 is sleeved on the outer surface of the filter frame 31, and the top of the filter frame 31 abuts against one side of the positioning sleeve 35; a positioning mechanism 2 is installed on the outside of the filter frame 31, the positioning mechanism 2 includes a snap-fit ​​frame 24, one side of the snap-fit ​​frame 24 is fixedly connected to the bottom of the filter frame 31, and the other side of the snap-fit ​​frame 24 is snapped with a movable frame 22, one end of the movable frame 22 is threadedly connected to a threaded rod 21, one end of the threaded rod 21 is rotatably connected to the bottom of the detector body 1; the other end of the movable frame 22 is slidably connected to a guide rod 23, one end of the guide rod 23 is fixedly connected to the bottom of the detector body 1.

[0026] Insert the top of the filter frame 31 into the inner ring of the positioning sleeve 35. Seal the connection between the filter frame 31 and the positioning sleeve 35 with the sealing ring 37. Then rotate the threaded rod 21 to move the threaded movable frame 22. The other end of the movable frame 22 slides outside the guide rod 23, fixing the movable frame 22 to make linear movement, so that the movable frame 22 is inserted into the inside of the snap-fit ​​frame 24, providing the filter frame 31 with upward support to abut against the positioning sleeve 35, preventing the filter frame 31 from falling off and affecting filtration. When cleaning or replacement is required, the movable frame 22 can be separated from the snap-fit ​​frame 24 by rotating the threaded rod 21 in the opposite direction, and the filter frame 31 can be disassembled.

[0027] The usage and working principle of this device are as follows: Insert the top of the filter frame 31 into the inner ring surface of the positioning sleeve 35. Seal the connection between the filter frame 31 and the positioning sleeve 35 using the sealing ring 37. Then, rotate the threaded rod 21 to move the movable frame 22, causing it to engage with the snap-fit ​​frame 24. This provides upward support for the filter frame 31 to abut against the positioning sleeve 35. The positioning block 38 on one side of the fine filter plate 33 is inserted into the positioning groove 312 to position the fine filter plate 33. Then, place the filter frame 31 into the positioning groove 312. 1. After being installed on the outside of the mounting sleeve 36, the pushing block 311 contacts the top side of the fine filter plate 33, pushing the compression spring 310 to compress and deform, and the telescopic rod 39 to retract. The elastic force of the deformed compression spring 310 can push the pushing block 311 to provide pressure to the fine filter plate 33, thereby maintaining the stable positioning of the fine filter plate 33. The filter frame 31 can coarsely filter large particulate impurities such as dust, fibers, and insects in the air, and then the fine filter plate 33 can finely filter fine dust such as dust and smoke-like impurities in the passing air.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A draw-through aspirating smoke fire detector with filtering function, comprising a detector body (1), characterized in that: The detector body (1) has an air outlet (4) and an air inlet (5) installed at its bottom. A filter mechanism (3) is installed outside the air inlet (5). The filter mechanism (3) includes a filter frame (31) and a mounting plate (36). One end of the mounting plate (36) is fixedly connected to the bottom of the detector body (1). The other end of the mounting plate (36) is sleeved with the inner ring surface of the filter frame (31). A fixing ring (32) is fixedly connected inside the filter frame (31). A positioning groove (312) is opened on the top side of the fixing ring (32). A positioning block (38) is inserted into the positioning groove (312). A fine filter plate (33) is fixedly connected to one end of the positioning block (38). The fine filter plate (33) is sleeved inside the filter frame (31). An inclined baffle (313) is installed inside the mounting plate (36).

2. The aspirating smoke detector with filtering function according to claim 1, characterized in that: The mounting sleeve (36) is internally fixedly connected to a fixing plate (34), and a telescopic rod (39) is fixedly connected to one side of the fixing plate (34). A push block (311) is fixedly connected to one end of the telescopic rod (39), and one end of the push block (311) abuts against one side of the fine filter plate (33).

3. A draw - over smoke fire detector with filtering function according to claim 2, characterized in that: A compression spring (310) is sleeved on the outside of the telescopic rod (39), and the compression spring (310) is disposed between the fixed plate (34) and the push block (311).

4. The aspirating smoke fire detector with filtering function according to claim 1, characterized in that: The mounting sleeve (36) is fixedly connected to the outside of a positioning sleeve (35), and a sealing ring (37) is fixedly connected to the inner annular surface of the positioning sleeve (35).

5. A draw - over smoke fire detector with filtering function according to claim 4, characterized in that: The inner ring of the sealing ring (37) is fitted onto the outer surface of the filter frame (31), and the top of the filter frame (31) abuts against one side of the positioning sleeve (35).

6. The aspirating smoke fire detector with filtering function according to claim 1, characterized in that: The filter frame (31) is externally equipped with a positioning mechanism (2). The positioning mechanism (2) includes a snap-fit ​​frame (24). One side of the snap-fit ​​frame (24) is fixedly connected to the bottom of the filter frame (31). The other side of the snap-fit ​​frame (24) is snapped with a movable frame (22). One end of the movable frame (22) is threadedly connected to a threaded rod (21). One end of the threaded rod (21) is rotatably connected to the bottom of the detector body (1).

7. A draw - over smoke fire detector with filtering function according to claim 6, characterized in that: The other end of the movable frame (22) is slidably connected to a guide rod (23), and one end of the guide rod (23) is fixedly connected to the bottom of the detector body (1).

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