Air-breathing smoke detection magnetic external filter

Abstract

The utility model relates to the technical field of smoke detection, and discloses an air-breathing smoke detection magnetic external filter which comprises an outer shell, an air inlet and an air outlet are formed in opposite faces of the side wall of the outer shell respectively, the air outlet is connected with the air inlet end of an air-breathing smoke detector in a sealed mode, and a cover plate is detachably arranged at the top of the outer shell; the magnetic filtering assembly is detachably arranged in the outer shell and communicates with the air inlet through an air inlet pipe, the upper end of the magnetic filtering assembly makes close contact with the cover plate, the magnetic filtering assembly is formed by stacking multiple layers of filter screens, the end of the air inlet pipe extends into the inner side of the inner layer filter screen, the adjacent filter screens are supported through a plurality of spacing columns, and the spacing columns have magnetism; the magnetic filter assembly further comprises a strong magnet arranged below the multiple layers of filter screens; the electrostatic adsorption assembly is arranged between the magnetic filtering assembly and the air outlet and is in sealed connection with the air outlet. The utility model has the advantages that the magnetic filtering structure is added, so that the filtering part can remove magnetic powder.

Description

Technical Field

[0001] This utility model relates to the field of smoke detection technology, specifically to an aspirating magnetic external filter for smoke detection. Background Technology

[0002] An external filter for a smoke detector is an add-on device installed on the outside of the smoke detector. Its main function is to filter out impurities. In complex environments, such as those with high levels of dust, fibers, or small particulate pollutants, the external filter prevents these substances from entering the smoke detector. If these impurities enter the detector, they may interfere with the accuracy of smoke detection, causing false alarms or reducing the detector's sensitivity. For example, in factory workshops or construction sites, the external filter acts as a barrier, initially filtering the air so that only smoke can smoothly enter the detector for detection, thus ensuring that the smoke detector operates more accurately and reliably.

[0003] Most common smoke detectors use external filters, which are adequate for handling large dust particles in daily use. However, problems arise in harsh environments such as steel mills and machine repair shops. Large amounts of iron filings, magnetic powders, and other impurities in the air adhere tightly to the filter due to their magnetism. Conventional cleaning methods, such as simple tapping or blowing, are ineffective in removing them. Over time, the filter becomes severely clogged, obstructing airflow and significantly reducing the smoke detector's sensitivity. It may even cause frequent false alarms due to poor airflow, greatly affecting its normal operation. Utility Model Content

[0004] To solve the above-mentioned problems, this utility model proposes an external magnetic filter for smoke detection that incorporates a magnetic filter structure, enabling the filter section to remove magnetic powder.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is: an external magnetic filter for inhalation-type smoke detection, comprising:

[0006] The outer casing has an air inlet and an air outlet on opposite sides of its sidewalls. The air outlet is sealed to the air inlet of the inhalation smoke detector. The top of the outer casing is detachably provided with a cover plate. A sealing ring is provided on the inner side of the cover plate where it contacts the outer casing.

[0007] A magnetic filter assembly is detachably installed in the housing and connected to the air inlet via an air inlet pipe. Its upper end is in close contact with the cover plate. The magnetic filter assembly is composed of multiple layers of filter screens. The end of the air inlet pipe extends into the inner side of the inner layer of filter screens. Adjacent filter screens are supported by several spacer columns. The spacer columns are magnetic. The magnetic filter assembly also includes a strong magnet located below the multiple layers of filter screens.

[0008] An electrostatic adsorption component is disposed between the magnetic filter component and the air outlet, and is sealed to the air outlet.

[0009] Furthermore, the outer shell is made of a corrosion-resistant material and has a cuboid shape; the corrosion-resistant material is stainless steel or engineering plastic.

[0010] Furthermore, the cover plate is fixed to the outer shell by a snap-fit ​​structure.

[0011] Furthermore, the mesh size of the filter screens in the magnetic filter assembly increases from the inside out, with the outermost filter screen having a mesh size range of 100-500 mesh and the innermost filter screen having a mesh size range of 10-50 mesh.

[0012] Furthermore, the filter screen and the bottom surface of the strong magnet are fixedly provided with the same base plate, and the housing is fixedly provided with a matching base plate, and the base plate is snapped into the base plate.

[0013] Furthermore, a sealing sleeve is provided at the junction of the filter and the air intake pipe, and the air intake pipe and the sealing sleeve are detachably connected.

[0014] Furthermore, the electrostatic adsorption component is made of electrostatic electret fiber material and is pleated.

[0015] Compared with existing technologies, the advantages of this invention are as follows: the magnetic filter assembly is composed of multiple layers of stacked filter screens, with adjacent screens supported by magnetic spacers, and a strong magnet at the bottom. When air containing magnetic powder enters through the inlet and into the magnetic filter assembly via the inlet pipe, the magnetic powder is adsorbed onto the filter screens by the magnetic force of the spacers and the strong attraction of the magnet, thus effectively removing the magnetic powder. This improves the overall filtration performance of the filter, prevents magnetic powder from entering the subsequent aspirating smoke detector, avoids damage to the detector's internal precision components, extends the detector's lifespan, ensures more accurate smoke monitoring, reduces false alarms caused by magnetic powder interference, and makes the entire smoke detection system more stable and reliable. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is the front view of this utility model;

[0018] Figure 3 This is a side view of the present invention;

[0019] Figure 4 This is a schematic diagram of the internal structure of the outer shell of this utility model.

[0020] As shown in the figure: 1. Outer shell; 2. Air inlet; 3. Air outlet; 4. Cover plate; 5. Air inlet pipe; 6. Filter screen; 7. Spacer column; 8. Strong magnet; 9. Electrostatic adsorption component; 10. Buckle structure; 11. Seat plate; 12. Card holder; 13. Sealing sleeve. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] Combined with appendix Figure 1 Appendix Figure 2 A magnetic external filter for inhalation-type smoke detection includes: a housing 1, with an air inlet 2 and an air outlet 3 respectively provided on opposite sides of its sidewalls; the air outlet 3 is sealed to the air inlet end of the inhalation-type smoke detector; the housing 1 is made of corrosion-resistant material and has a cuboid shape; the corrosion-resistant material is stainless steel or engineering plastic, which can effectively resist corrosion, extend service life, and the cuboid shape facilitates installation and placement.

[0023] Combined with appendix Figure 3 Appendix Figure 4 The top of the outer casing 1 is detachably provided with a cover plate 4. The cover plate 4 is fixed to the outer casing 1 by a snap-fit ​​structure 10. The fixing method is simple and convenient to operate and facilitates the opening and closing of the cover plate 4.

[0024] Combined with appendix Figure 4 The magnetic filter assembly is detachably installed inside the outer casing 1 and connected to the air inlet 2 via the air inlet pipe 5. Its upper end is in close contact with the cover plate 4. The magnetic filter assembly is composed of multiple layers of filter screens 6. The end of the air inlet pipe 5 extends into the inner layer of filter screen 6. A sealing sleeve 13 is provided at the junction of the filter screen 6 and the air inlet pipe 5. The air inlet pipe 5 and the sealing sleeve 13 are detachably connected, which can not only ensure the sealing of the connection and prevent air leakage, but also facilitate the removal of the magnetic filter assembly for maintenance, cleaning or replacement.

[0025] Combined with appendix Figure 4 The adjacent filter screens 6 are supported by a number of spacer columns 7, which are magnetic. The mesh size of the filter screens 6 in the magnetic filter assembly increases from the inside to the outside. The mesh size of the outermost filter screen 6 ranges from 100 to 500 meshes, and the mesh size of the innermost filter screen 6 ranges from 10 to 50 meshes. This can achieve graded filtration of impurities of different particle sizes and improve the filtration effect.

[0026] Combined with appendix Figure 4The magnetic filter assembly also includes a strong magnet 8 located below the multi-layer filter screen 6. The filter screen 6 and the strong magnet 8 are fixedly provided with the same base plate 11 on their bottom surfaces. The housing 1 is fixedly provided with a matching base plate 12. The base plate 11 is snapped into the base plate 12, which is installed firmly and stably, and at the same time facilitates the disassembly and replacement of the magnetic filter assembly.

[0027] Combined with appendix Figure 4 An electrostatic adsorption component 9 is disposed between the magnetic filter component and the air outlet 3, and is sealed to the air outlet 3. The electrostatic adsorption component 9 is made of electrostatic electret fiber material and is pleated, which can better adsorb small particles. The pleats can increase the adsorption area and enhance the adsorption effect.

[0028] The specific implementation of this utility model is as follows: First, the outer casing 1 is installed in a suitable position, and the air outlet 3 is sealed and connected to the air inlet of the inhalation smoke detector. Then, the magnetic filter assembly is installed inside the outer casing 1. The base plate 11 of this assembly is snapped into the slot 12 embedded in the outer casing 1 for fixation. The end of the air inlet pipe 5 passes through the sealing sleeve 13 and extends into the inner filter screen 6. The sealing sleeve 13 ensures the sealing of the connection. At the same time, it is necessary to ensure that the electrostatic adsorption assembly 9 is sealed and connected to the air outlet 3, and is in the correct position between the magnetic filter assembly and the air outlet 3. Next, the cover plate 4 is fixed to the top of the outer casing 1 by the snap-fit ​​structure 10 to ensure a tight connection.

[0029] In actual operation, outside air enters through the air inlet 2 on the side wall of the outer casing 1, flows into the magnetic filter assembly through the air inlet pipe 5, and in the magnetic filter assembly, due to the magnetic properties of the spacer column 7 and the strong magnet 8 at the bottom, magnetic powder in the air can be adsorbed. Furthermore, the multi-layered filter screen 6 with different mesh sizes filters the air sequentially from the inside out. After this initial filtration, the air enters the electrostatic adsorption assembly 9, where its electrostatic electret fiber material, with its pleated shape, further adsorbs fine particles. Finally, the purified air flows out from the air outlet 3 and enters the air inlet of the inhalation smoke detector, aiding in the accurate detection of smoke.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; for those skilled in the art, the specific meaning of the above term in this utility model can be understood according to the specific circumstances.

[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A magnetic external filter for inhalation-type smoke detection, characterized in that, include: The outer shell (1) has an air inlet (2) and an air outlet (3) respectively on opposite sides of its side wall. The air outlet (3) is sealed to the air inlet of the inhalation smoke detector. The top of the outer shell (1) is detachably provided with a cover plate (4). A sealing ring is provided on the inner side of the cover plate (4) and at the contact point with the outer shell (1). A magnetic filter assembly is detachably disposed inside the outer shell (1) and connected to the air inlet (2) through an air inlet pipe (5). Its upper end is in close contact with the cover plate (4). The magnetic filter assembly is composed of multiple layers of filter screens (6). The end of the air inlet pipe (5) extends into the inner side of the inner layer filter screen (6). Adjacent filter screens (6) are supported by several spacer columns (7). The spacer columns (7) are magnetic. The magnetic filter assembly also includes a strong magnet (8) disposed below the multiple layers of filter screens (6). An electrostatic adsorption component (9) is disposed between the magnetic filter component and the air outlet (3) and is sealed to the air outlet (3).

2. The magnetic external filter for inhalation-type smoke detection according to claim 1, characterized in that: The outer shell (1) is made of a corrosion-resistant material and has a cuboid shape. The corrosion-resistant material is stainless steel or engineering plastic.

3. The magnetic external filter for inhalation-type smoke detection according to claim 1, characterized in that: The cover plate (4) is fixed to the outer shell (1) by a snap-fit ​​structure (10).

4. The magnetic external filter for inhalation-type smoke detection according to claim 1, characterized in that: The mesh count of the filter screen (6) in the magnetic filter assembly increases from the inside to the outside. The mesh count of the outermost filter screen (6) ranges from 100 to 500 meshes, and the mesh count of the innermost filter screen (6) ranges from 10 to 50 meshes.

5. The aspirating smoke detector magnetic external filter according to claim 1, characterized in that: The filter screen (6) and the strong magnet (8) are fixedly provided with the same base plate (11) on their bottom surfaces. The outer shell (1) is fixedly provided with a matching base plate (12) and the base plate (11) is snapped into the base plate (12).

6. The aspirating smoke detector magnetic external filter according to claim 1, characterized in that: A sealing sleeve (13) is provided at the junction of the filter (6) and the air inlet pipe (5), and the air inlet pipe (5) and the sealing sleeve (13) are detachably connected.

7. The aspirating smoke detector magnetic external filter according to claim 1, characterized in that: The electrostatic adsorption component (9) is made of electrostatic electret fiber material and is wrinkled.

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