Quick-release type magnetic attraction frame for central air conditioner filter screen

Abstract

The utility model discloses a central air conditioner filter screen quick release type magnetic suction frame, which belongs to the technical field of central air conditioner filter screens, and comprises a mounting frame and a filter screen, the mounting frame and the filter screen are fixedly connected together through magnetic suction mechanisms, and the two sides of the inner wall of the mounting frame and the two sides of the rear wall of the filter screen are respectively provided with the magnetic suction mechanisms. A more stable magnetic attraction structure is formed through cooperation of the magnetic attraction strip, the concave strip, the limiting plate and other components, the positioning opening in the bottom face of the magnetic attraction strip is matched with the positioning block in the concave strip, the positioning effect is achieved, it is ensured that the magnetic attraction strip is accurately installed, and the magnetic attraction precision is enhanced; meanwhile, the front and back symmetrical magnetic attraction strips magnetically attract each other, compared with direct attraction of a traditional single magnetic block, the magnetic attraction contact area and the attraction force are increased, the magnetic attenuation or failure risk caused by factors such as high-frequency disassembly and assembly abrasion, environment temperature change and moisture oxidation is effectively reduced, the filter screen is stably installed under the operation wind pressure of an air conditioner, loosening and falling are avoided, and the service life of the filter screen is prolonged. The filtering effect and the equipment safety are ensured.

Description

Technical Field

[0001] This utility model relates to the field of central air conditioning filter technology, and in particular to a quick-release magnetic frame for central air conditioning filters. Background Technology

[0002] Central air conditioning filters are key components in central air conditioning systems, typically installed in return air vents or air handling units. Their core function is to physically intercept and remove suspended particulate matter such as dust, pollen, hair, fibers, bacteria, and viruses, as well as some harmful substances, from the air entering the system, thereby purifying indoor air and preventing these pollutants from entering the air conditioning ducts and heat exchangers. Filter materials are often multi-layered fiber structures (such as polyester or fiberglass) or metal mesh, with a surface covered in dense micropores to effectively capture impurities of different sizes. Over time, dust accumulation in the filter increases resistance, affecting airflow and energy efficiency, and may even cause secondary pollution. Therefore, regular cleaning or replacement is necessary (generally, it is recommended to check every 1-3 months, depending on the usage environment). Their filtration effect directly impacts indoor air quality and the lifespan of the air conditioning system, serving as a crucial barrier for ensuring healthy breathing and efficient equipment operation.

[0003] In existing technologies, traditional central air conditioning filters are typically installed and fixed to a mounting frame inside the return air vent using screws. This method requires tools for installation and removal, making the process cumbersome and time-consuming, and unsuitable for rapid maintenance. Therefore, existing technologies are gradually replacing traditional screw fixing with magnetic frames. By incorporating magnetic components (such as magnetic blocks or strips) within the frame and filter, the principle of opposite magnetic poles attracting is utilized to achieve quick and easy installation and removal of the filter, significantly improving efficiency.

[0004] However, existing magnetic frames still have the following technical problems:

[0005] Insufficient magnetic stability: Existing solutions rely solely on magnetic blocks to directly adsorb and fix the filter screen. However, these magnetic blocks are susceptible to wear from high-frequency disassembly and assembly, changes in ambient temperature (such as localized high temperatures during air conditioner operation), and oxidation caused by humidity, leading to magnetic attenuation or failure. When the magnetic force of the magnetic blocks is insufficient, the filter screen may loosen and fall off under the air pressure of the air conditioner, causing filtration failure or safety hazards (such as the filter screen falling and damaging the equipment).

[0006] High maintenance costs for magnetic blocks: In traditional magnetic structures, magnetic blocks are mostly installed by gluing or fixing. Once they become demagnetized, broken, or loose, the entire frame or filter assembly needs to be replaced. It is not possible to disassemble and replace the magnetic blocks individually, resulting in high maintenance costs and waste of resources.

[0007] Lack of auxiliary fixing structure: The single magnetic attraction method does not combine mechanical limiting design. When the performance of the magnetic block deteriorates, there is a lack of redundant fixing means, making it difficult to ensure the reliability of the filter after installation. This risk is more prominent, especially in large-size filters or high-pressure scenarios. Summary of the Invention

[0008] The main purpose of this utility model is to provide a quick-release magnetic frame for central air conditioning filters, which can effectively solve the problems in the background art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A quick-release magnetic frame for a central air conditioning filter includes a mounting frame and a filter. The mounting frame and the filter are fixedly connected together by a magnetic attraction mechanism. Magnetic attraction mechanisms are provided on both sides of the inner wall of the mounting frame and on both sides of the rear wall of the filter. Each magnetic attraction mechanism includes a magnetic strip, a recessed strip, a fixing rod, a spring, a limiting plate, a movable block, and an insert block. The fixing rod is fixedly connected to the inside of the side wall of the recessed strip, and the spring is sleeved on the outer wall of the fixing rod. The limiting plate is movably connected to the fixing rod through a connecting hole on its top surface, and the magnetic strip is fixedly connected to the recess of the recessed strip through the limiting plate. A set of symmetrical movable blocks are also movably connected to both sides of the filter, and an insert block is fixedly connected to the outer wall of each movable block.

[0011] As a preferred technical solution, a set of symmetrical recessed strips are fixedly installed inside the mounting frame and on the rear wall of the filter screen, and a positioning block is fixedly installed on the bottom surface of the recessed strip.

[0012] As a preferred technical solution, a vertical opening is provided on the upper part of the inner wall of the concave strip, and a first sliding groove is provided on both sides of the inner wall of the vertical opening. A through opening is provided on the inner bottom surface of the vertical opening, and a fixing rod is fixedly installed on the inner top surface of the vertical opening. A first slider is fixedly installed on the top of the front and rear side walls of the limiting plate, and the first slider is movably installed in the first sliding groove. A connecting hole is provided on the top surface of the limiting plate, and the limiting plate is movably installed together with the fixing rod through the connecting hole. The spring is sleeved on the outside of the fixing rod, and the spring is also fixedly installed between the vertical opening and the opposite wall of the limiting plate. A push plate is also fixedly installed on the top of the inner wall of the limiting plate.

[0013] As a preferred technical solution, the bottom surface of the magnetic strip is provided with a positioning opening, and the top surface of the magnetic strip is provided with a limiting groove, and the magnetic strips that are symmetrical front and back are magnetically attracted to each other.

[0014] As a preferred technical solution, a set of symmetrical slots are provided on the inner left and right side walls of the mounting frame, in front of the recessed strip.

[0015] As a preferred technical solution, a set of symmetrical side openings are respectively opened on the left and right side walls of the filter screen, and a second sliding groove is opened on the top and bottom surfaces of the side openings. A second slider is fixedly installed on the top and bottom surfaces of the movable block, and the second slider is movably installed in the second sliding groove. An insert is also fixedly installed on the outer side wall of the movable block, and the insert is inserted into the slot.

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

[0017] In this invention, the magnetic attraction mechanism, through the cooperation of magnetic strips, concave strips, limiting plates, and other components, forms a more stable magnetic attraction structure. The positioning port on the bottom surface of the magnetic strip cooperates with the positioning block in the concave strip to play a positioning role, ensuring accurate installation of the magnetic strip and enhancing magnetic attraction accuracy. At the same time, the symmetrical magnetic strips attract each other, which, compared with the traditional direct adsorption of a single magnetic block, increases the magnetic contact area and attraction force, effectively reducing the risk of magnetic attenuation or failure caused by high-frequency disassembly and assembly wear, changes in ambient temperature, and humidity oxidation. This ensures that the filter is stably installed under the air pressure of the air conditioner, preventing loosening and falling off, and guaranteeing the filtration effect and equipment safety.

[0018] The magnetic strip is installed in the recess of the groove through a limiting plate. The limiting plate can move up and down through components such as a fixing rod and a spring. When the magnetic strip is demagnetized, broken, or loose, simply push the push plate upward to move the limiting plate upward against the spring force, and the magnetic strip can be removed from the groove for individual replacement. There is no need to replace the entire frame or filter assembly, which effectively reduces maintenance costs and improves resource utilization.

[0019] In addition to the magnetic attraction mechanism, this frame also has auxiliary fixing components such as slots, side openings, movable blocks, and inserts on the mounting frame and filter screen. The movable blocks on both sides of the filter screen are movably connected to the second sliding groove in the side opening through the second slider. The inserts on the movable blocks can be inserted into the slots in the mounting frame to form a mechanical limit. When the performance of the magnetic block deteriorates, this mechanical limit structure serves as a redundant fixing method, which can effectively ensure the reliability of the filter screen after installation. It is especially suitable for large-size filter screens or high wind pressure scenarios, reducing the risk of the filter screen falling and improving the stability and safety of the overall structure.

[0020] During installation, simply bring the filter screen close to the mounting frame. The magnetic strip will guide the filter screen into initial positioning. Then, align the insert block with the slot and insert it to complete the installation. During disassembly, first pull the insert block out of the slot, and then separate the magnetic strip on the filter screen from the magnetic strip inside the mounting frame to easily separate the filter screen from the mounting frame. No tools are required, making the operation simple and quick, meeting the needs of rapid maintenance and improving work efficiency. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram showing the overall structure of this utility model broken down.

[0023] Figure 3 This is a structural breakdown diagram of the magnetic attraction mechanism of this utility model;

[0024] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point B;

[0025] Figure 5 This is a schematic diagram of the overall structure of the mounting frame of this utility model;

[0026] Figure 6 For the present utility model Figure 2 A magnified diagram showing the structural breakdown at point A.

[0027] In the diagram: 1. Mounting frame; 2. Filter screen; 3. Magnetic suction mechanism; 4. Magnetic suction strip; 5. Positioning port; 6. Limiting groove; 7. Recessed strip; 8. Positioning block; 9. Vertical opening; 10. First sliding groove; 11. Through opening; 12. Fixing rod; 13. Spring; 14. Limiting plate; 15. First slider; 16. Connecting hole; 17. Push plate; 18. Slot; 19. Side opening; 20. Second sliding groove; 21. Movable block; 22. Second slider; 23. Insert block. Detailed Implementation

[0028] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1 - Figure 6As shown, a quick-release magnetic frame for a central air conditioning filter includes a mounting frame 1 and a filter 2. The mounting frame 1 and the filter 2 are fixedly connected together by a magnetic attraction mechanism 3. Magnetic attraction mechanisms 3 are provided on both sides of the inner wall of the mounting frame 1 and on both sides of the rear wall of the filter 2. The magnetic attraction mechanism 3 includes a magnetic strip 4, a recessed strip 7, a fixing rod 12, a spring 13, a limiting plate 14, a movable block 21, and an insert block 23. The fixing rod 12 is fixedly connected to the inside of the side wall of the recessed strip 7, and the spring 13 is sleeved on the outer wall of the fixing rod 12. The limiting plate 14 is movably connected to the fixing rod 12 through a connecting hole 16 on the top surface, and the magnetic strip 4 is fixedly connected to the recess of the recessed strip 7 through the limiting plate 14. A set of symmetrical movable blocks 21 are also movably connected to both sides of the filter 2, and an insert block 23 is fixedly connected to the outer side wall of the movable block 21.

[0030] like Figures 2-4 As shown, a set of symmetrical recessed strips 7 are fixedly installed inside the mounting frame 1 and on the rear wall of the filter screen 2, and a positioning block 8 is fixedly installed on the bottom surface of the recessed groove of the recessed strip 7. The positioning block 8 on the bottom surface of the recessed groove of the recessed strip 7 cooperates with the positioning port 5 on the bottom surface of the magnetic strip 4. When installing the magnetic strip 4, the positioning block 8 is inserted into the positioning port 5 to accurately position the magnetic strip 4 and ensure the correct installation position of the magnetic strip 4 in the recessed strip 7.

[0031] like Figure 3 and Figure 4 As shown, a vertical opening 9 is provided above the inner sidewall of the recessed strip 7, and first sliding grooves 10 are respectively provided on both sides of the inner wall of the vertical opening 9. A through opening 11 is provided on the inner bottom surface of the vertical opening 9, and a fixing rod 12 is fixedly installed on the inner top surface of the vertical opening 9. First sliders 15 are respectively fixedly installed on the top of the front and rear side walls of the limiting plate 14, and the first sliders 15 are movably installed in the first sliding grooves 10. A connecting hole 16 is provided on the top surface of the limiting plate 14, and the limiting plate 14 is movably installed together with the fixing rod 12 through the connecting hole 16. A spring 13 is sleeved on the outside of the fixing rod 12, and the spring 13 is also fixedly installed on the opposite side of the vertical opening 9 and the limiting plate 14. Between the walls, a push plate 17 is also fixedly installed on the top of the inner side wall of the limiting plate 14. When the push plate 17 is pushed upward, the limiting plate 14 moves upward against the elastic force of the spring 13, which can remove the magnetic strip 4 from the recessed strip 7. When the push plate 17 is released, the spring 13 pushes the limiting plate 14 downward, which limits and clamps the magnetic strip 4 in the recessed strip 7. This structural design makes the installation and disassembly of the magnetic strip 4 convenient. When the magnetic strip 4 fails, it is not necessary to disassemble the entire frame or filter assembly. The magnetic strip 4 can be replaced separately by simply operating the push plate 17, which reduces maintenance costs. At the same time, the elastic pressing effect of the spring 13 further enhances the stability of the magnetic strip 4 after installation.

[0032] like Figure 3As shown, the bottom surface of the magnetic strip 4 has a positioning port 5, and the top surface of the magnetic strip 4 has a limiting groove 6. The front and rear symmetrical magnetic strips 4 are magnetically attracted to each other. The positioning port 5 on the bottom surface of the magnetic strip 4 cooperates with the positioning block 8 in the recess 7 to achieve positioning. The limiting groove 6 on the top surface can cooperate with the limiting plate 14. The limiting plate 14 limits the magnetic strip 4 to prevent the magnetic strip 4 from moving up and down in the recess 7. The front and rear symmetrical magnetic strips 4 attract each other with magnetism to fix the mounting frame 1 and the filter screen 2. The mutual magnetic attraction of the front and rear magnetic strips 4 increases the adsorption force between the mounting frame 1 and the filter screen 2. Compared with the traditional single magnetic block adsorption, it can better resist the influence of external factors on magnetism and improve the reliability of the magnetic structure.

[0033] like Figure 5 As shown, a set of symmetrical slots 18 are provided on the inner left and right side walls of the mounting frame 1 and in front of the recessed strip 7. The slots 18 on the inner left and right side walls of the mounting frame 1 are corresponding to the inserts 23 on the side walls of the filter screen 2.

[0034] like Figure 2 and Figure 6 As shown, a set of symmetrical side openings 19 are respectively opened on the left and right side walls of the filter screen 2, and a second sliding groove 20 is opened on the top and bottom surfaces of the side openings 19. A second slider 22 is fixedly installed on the top and bottom surfaces of the movable block 21, and the second slider 22 is movably installed in the second sliding groove 20. An insert 23 is also fixedly installed on the outer side wall of the movable block 21, and the insert 23 is inserted into the slot 18. The movable block 21 can slide within the side opening 19 through the cooperation of the second slider 22 on the top and bottom surfaces with the second sliding groove 20 in the side opening 19. When installing filter 2, insert the plug 23 into slot 18 to achieve mechanical positioning; when disassembling, simply pull the plug 23 out of slot 18. The mechanical positioning structure formed by slot 18 and plug 23 serves as an auxiliary fixing means for the magnetic structure. When the magnetism of magnetic strip 4 decreases, this structure can effectively prevent filter 2 from loosening and falling off. It is especially suitable for large-size filters or high wind pressure scenarios, providing redundant protection for filter installation and improving the stability and safety of the overall structure. At the same time, the insertion and removal of plug 23 is simple and does not affect the convenience of quick installation and removal of the filter.

[0035] The specific operating principle of this quick-release magnetic frame for central air conditioning filters is as follows:

[0036] During installation, the user holds the filter 2 and slowly approaches it towards the mounting frame 1 at the central air conditioning return vent. At this time, the recessed strips 7 fixed on both sides of the inner wall of the mounting frame 1 correspond to the recessed strips 7 on both sides of the rear wall of the filter 2. As it gets closer, the magnetic strips 4 installed in the recessed strips 7 of the mounting frame 1 and the filter 2 attract each other based on magnetism. The strong magnetic force between the symmetrical magnetic strips 4 acts like invisible hands, tightly pulling the two together, so that the filter 2 is magnetically installed in the frame of the mounting frame 1. At the same time, a set of symmetrical slots 18 pre-cut on the left and right side walls inside the mounting frame 1 connects with the sides of the filter 2. The structure on the wall echoes the design. Specifically, a set of symmetrical side openings 19 are opened on the left and right sides of the filter screen 2. The second sliding grooves 20 on the top and bottom surfaces of the filter screen 2 provide a sliding track for the movable block 21. The second slider 22, which is fixedly installed on the top and bottom surfaces of the movable block 21, can slide flexibly within the second sliding grooves 20. The user can manually push the movable block 21 so that the insert 23, which is fixedly connected to the outer wall of the movable block 21, is precisely inserted along the direction of the slot 18. When the insert 23 is fully inserted into the slot 18, the mechanical limiting structure is completed. Together with the magnetic suction mechanism 3, the filter screen 2 is firmly fixed in the mounting frame 1.

[0037] When it is necessary to disassemble the filter screen 2, first release the mechanical limiting structure. The user manually slides the movable block 21 along the second slide groove 20 in the side opening 19 so that the insert block 23 can be smoothly pulled out from the slot 18 of the mounting frame 1 to release the mechanical fixation. Then, using the characteristics of the magnetic strip 4, apply a slight external force to the filter screen 2 to break the adsorption force between the magnetic strips 4, so that the magnetic strips 4 on the filter screen are separated from the magnetic strips 4 in the mounting frame 1, thereby easily removing the filter screen 2 from the mounting frame 1.

[0038] If the magnetic strip 4 malfunctions and needs replacement, the operation is equally convenient and efficient. The user pushes the push plate 17, which is fixedly installed on the top of the inner wall of the limiting plate 14, upwards. The push plate 17 drives the limiting plate 14 to overcome the elastic force of the spring 13 and move upwards through the connecting hole 16 on the top surface along the fixing rod 12 into the vertical opening 9. The first sliders 15 on both sides of the limiting plate 14 will slide upwards along the first sliding groove 10 on the inner wall of the vertical opening 9 until the limiting plate 14 moves out of the limiting groove 6 on the top surface of the magnetic strip 4. At this time, its limiting effect on the magnetic strip 4 is released, and the faulty magnetic strip 4 can be removed. When the magnetic strip 4 is removed from the recess of the groove 7 and a new magnetic strip 4 is replaced, the new magnetic strip 4 is first placed in the recess of the groove 7, ensuring that the positioning port 5 on its bottom surface is accurately fitted into the positioning block 8 to complete the positioning. Then, the push plate 17 is released, the spring 13 returns to its deformation, and pushes the limiting plate 14 down. The bottom part of the limiting plate 14 passes through the through hole 11 opened on the bottom surface of the vertical opening 9 and is inserted into the limiting groove 6 on the top surface of the magnetic strip 4 to limit and fix the limiting groove 6, so as to firmly fix the new magnetic strip 4 in the groove 7 and restore the normal function of the magnetic attraction mechanism 3.

[0039] Throughout the entire process, from magnetic positioning and mechanical limiting to the convenient replacement of magnetic strip 4, no additional tools are required. The filter 2 can be quickly installed and removed, and the magnetic strip 4 can be maintained through simple manual operation. This not only significantly improves the maintenance efficiency of the central air conditioning filter 2, but also ensures the stability and reliability of the filter during use through multiple fixing structures, reducing the risk caused by filter loosening or magnetic failure, while reducing maintenance costs and improving resource utilization efficiency.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0042] 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 central air conditioner filter screen quick-release magnetic frame, comprising a mounting frame (1) and a filter screen (2), characterized in that: The mounting frame (1) and the filter screen (2) are fixedly connected together by a magnetic attraction mechanism (3). The inner walls of the mounting frame (1) and the rear walls of the filter screen (2) are respectively provided with magnetic attraction mechanisms (3). The magnetic attraction mechanism (3) includes a magnetic attraction strip (4), a concave strip (7), a fixing rod (12), a spring (13), a limiting plate (14), a movable block (21), and an insert block (23). The fixing rod (12) is fixedly connected to the inside of the side wall of the concave strip (7), and the spring (13) is sleeved on the outer wall of the fixing rod (12). The limiting plate (14) is movably connected to the fixing rod (12) through the connecting hole (16) on the top surface. The magnetic attraction strip (4) is fixedly connected to the concave strip (7) through the limiting plate (14). A set of symmetrical movable blocks (21) are also movably connected to the two side walls of the filter screen (2), and an insert block (23) is fixedly connected to the outer side wall of the movable block (21).

2. The quick-release magnetic frame for a central air conditioner filter screen according to claim 1, characterized in that: A set of symmetrical recessed strips (7) are fixedly installed inside the mounting frame (1) and on the rear wall of the filter screen (2), and a positioning block (8) is fixedly installed on the bottom surface of the recessed strip (7).

3. The quick-release magnetic frame for a central air conditioner filter according to claim 2, wherein: A vertical opening (9) is provided on the upper side of the inner wall of the recessed strip (7), and a first sliding groove (10) is provided on both sides of the inner wall of the vertical opening (9). A through opening (11) is provided on the inner bottom surface of the vertical opening (9), and a fixing rod (12) is fixedly installed on the inner top surface of the vertical opening (9). A first slider (15) is fixedly installed on the top of the front and rear side walls of the limiting plate (14), and the first slider (15) is movably installed in the first sliding groove (10). A connecting hole (16) is provided on the top surface of the limiting plate (14), and the limiting plate (14) is movably installed together with the fixing rod (12) through the connecting hole (16). The spring (13) is sleeved on the outside of the fixing rod (12), and the spring (13) is also fixedly installed between the opposite walls of the vertical opening (9) and the limiting plate (14). A push plate (17) is also fixedly installed on the top of the inner wall of the limiting plate (14).

4. A quick-release magnetic frame for a central air conditioning filter according to claim 3, characterized in that: The bottom surface of the magnetic strip (4) is provided with a positioning port (5), and the top surface of the magnetic strip (4) is provided with a limiting groove (6). The magnetic strips (4) that are symmetrical front and back are magnetically attracted to each other.

5. The quick-release magnetic frame for central air conditioner filter screen according to claim 4, wherein: On the inner left and right side walls of the mounting frame (1) and in front of the recessed strip (7), a set of symmetrical slots (18) are provided.

6. The quick-release magnetic frame for central air conditioner filter screen according to claim 5, characterized in that: The filter screen (2) has a set of symmetrical side openings (19) on its left and right side walls respectively. The top and bottom surfaces of the side openings (19) are respectively provided with second sliding grooves (20). The top and bottom surfaces of the movable block (21) are respectively fixedly installed with second sliders (22), and the second sliders (22) are movably installed in the second sliding grooves (20). The outer side wall of the movable block (21) is also fixedly installed with inserts (23), and the inserts (23) are inserted into the slots (18).

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