Three-layer composite filter cartridge for central air-conditioning filter system

Abstract

The utility model discloses a three-layer composite filter cartridge for a central air-conditioning filter system, which comprises a mounting bottom plate and a filter barrel, and the upper side surface of the mounting bottom plate is provided with uniformly distributed insertion grooves; the filtering barrel comprises an inner barrel, a middle barrel, an outer barrel, rotating shafts and spiral blades, the lower ends of the inner barrel, the middle barrel and the outer barrel are inserted into the inserting grooves adjacent to the lower sides, the inner barrel, the middle barrel and the outer barrel are distributed in a staggered mode, the rotating shafts which are evenly distributed are arranged between the middle barrel and the outer barrel, and the spiral blades are arranged on the outer arc surfaces of the rotating shafts; according to the three-layer composite filter cartridge for the central air-conditioning filter system, the contact time of airflow and a filter material is prolonged, the filter material of the outer barrel is not easily and quickly blocked by large particles, so that the service life of the whole filter cartridge is prolonged, meanwhile, the three-layer composite filter cartridge, the separation cover plate and the filter barrel can be quickly disassembled, and the three-layer composite filter cartridge is convenient and quick to use. And the maintenance efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of filtration system technology, specifically a three-layer composite filter cartridge for a central air conditioning filtration system. Background Technology

[0002] With the improvement of people's living standards and the increasing requirements for indoor air quality, central air conditioning is being used more and more widely in various places, such as commercial buildings, office spaces and residences. Central air conditioning can not only regulate indoor temperature, but its filtration system is also the key to maintaining clean indoor air and plays an important role in protecting people's health. In modern building environments, indoor people are densely packed and there are many sources of air pollution, such as dust, pollen, bacteria and viruses. These pollutants can seriously affect indoor air quality. Therefore, a high-efficiency air conditioning filtration system has become an essential facility to ensure a comfortable and healthy indoor environment.

[0003] Existing three-layer composite filter cartridges typically consist of pre-filter, medium-efficiency filter, and high-efficiency filter layers. The pre-filter layer often uses coarse fiber materials to intercept larger dust particles, hair, and other impurities in the air, filtering pollutants with a particle size of 5μm or larger. The medium-efficiency filter layer is generally made of glass fiber or synthetic fiber mesh, mainly responsible for capturing particles of 1-5μm, further purifying the air. The high-efficiency filter layer often uses HEPA (High-Efficiency Particulate Air) material, which can filter particles larger than PM0.3 and has a high filtration efficiency for tiny pollutants such as bacteria and viruses in the air. During operation, air passes through these three filter layers in sequence, gradually removing pollutants of different particle sizes, achieving deep air purification.

[0004] The existing three-layer composite filtration technology has several problems. When the air conditioner is running, a large amount of air rushes into the filter cartridge, and the airflow spends too little time between the layers, failing to make sufficient contact with the filter material. This causes some pollutants to pass through quickly with the airflow without being filtered, reducing the effectiveness of filtration and making it difficult to guarantee the cleanliness of the output air, thus failing to provide users with a high-quality air environment. Furthermore, when large particles directly impact the primary filter layer, some particles may become embedded in the material, making them difficult to clean and affecting filtration performance. Additionally, cleaning or replacing the filter materials often requires specialized tools from professionals, consuming significant time and effort and increasing maintenance costs. Therefore, we propose a three-layer composite filter cartridge for central air conditioning filtration systems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a three-layer composite filter cartridge for central air conditioning filtration system, which can prolong the contact time between airflow and filter material, reduce the clogging of the outer layer, and can be quickly disassembled, thus effectively solving the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a three-layer composite filter cartridge for a central air conditioning filtration system, including a mounting base plate, wherein the upper side of the mounting base plate is provided with uniformly distributed insertion slots, and also includes a filter barrel;

[0007] Filter barrel: It includes an inner barrel, a middle barrel, an outer barrel, a rotating shaft and spiral blades. The lower ends of the inner barrel, the middle barrel and the outer barrel are all inserted into the adjacent insertion slots on the lower side. The inner barrel, the middle barrel and the outer barrel are staggered. A rotating shaft is evenly distributed between the middle barrel and the outer barrel. Spiral blades are provided on the outer arc surface of the rotating shaft.

[0008] The filter cartridge is equipped with a locking component at the top, which extends the contact time between the airflow and the filter material and makes it less likely for the filter material in the outer cartridge to be quickly clogged by large particles, thereby extending the service life of the entire filter cartridge. At the same time, the three-layer composite filter cartridge can be quickly disassembled, and the cover plate can be separated from the filter cartridge, which is convenient, quick and easy and improves maintenance efficiency.

[0009] Furthermore, it also includes a cover plate, which is located on the upper side of the filter barrel, and the top wall of the cover plate is rotatably connected to evenly distributed rotating shafts for rotational support.

[0010] Furthermore, the filter barrel also includes connecting blocks and convex limiting grooves. The upper sides of the inner barrel, the middle barrel, and the outer barrel are all provided with symmetrically distributed connecting blocks. The upper end of each connecting block is provided with a convex limiting groove. The middle part of the cover plate is provided with a relief hole corresponding to each connecting block. The upper end of each connecting block passes through the relief hole. The cooperation between the connecting block and the cover plate can accurately position each layer of the filter barrel.

[0011] Furthermore, the locking assembly includes a locking chamber, guide posts, and limiting rods. The lower end of the locking chamber is slidably connected to the upper outer arc surface of the cover plate. The top wall of the locking chamber has symmetrically distributed vertical plates at both the front and rear ends. Guide posts are provided between two adjacent left and right vertical plates. The outer arc surfaces of the guide posts are slidably connected to symmetrically distributed limiting rods. The limiting rods are all located inside the lower adjacent convex limiting grooves, thus achieving effective locking of the connection between the filter barrel and the cover plate.

[0012] Furthermore, the locking assembly also includes a paddle, a rotating paddle, a paddle bracket, and a paddle groove. The upper side of the limiting rod is provided with a paddle, and the front and rear ends of the upper sidewall of the locking chamber are rotatably connected to rotating paddles. The lower end of the rotating paddle is provided with a paddle bracket, and the left and right ends of the paddle bracket are provided with paddle grooves. The upper end of the paddle is located inside the adjacent upper paddle groove, providing a convenient operation method for unlocking the filter barrel and the cover.

[0013] Furthermore, the locking assembly also includes stabilizing plates and bolts. Stabilizing plates are provided on the upper end of the outer arc surface of the rotating column, and bolts are threaded to the left end of each stabilizing plate. Threaded holes are provided at both the front and rear ends of the upper side of the locking chamber, and the lower ends of each bolt are threaded to the adjacent threaded holes on the lower side, thereby enhancing the stability and reliability of the locking assembly.

[0014] Furthermore, the upper sidewall of the locking chamber is threaded with studs at both ends, and the upper sidewall of the cover plate is provided with connecting holes at both ends. The lower ends of the studs are threaded to the adjacent connecting holes on the lower side, which strengthens the connection and fixation between the locking chamber and the cover plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This three-layer composite filter cartridge for central air conditioning filtration systems has the following advantages:

[0016] 1. The inner, middle, and outer barrels of the three-layer composite filter cartridge are arranged in a non-concentric circle, forcing the airflow to pass through in an S-shaped path. This prolongs the contact time between the airflow and the filter material, further improving filtration efficiency and enabling more complete capture of impurities in the air. During operation, the airflow drives the spiral blades between the middle and outer barrels to rotate, generating centrifugal force that throws large particles toward the barrel wall. As large particles are continuously thrown toward the barrel wall, the number of large particles that originally needed to be directly filtered and intercepted by the outer barrel is reduced. The outer barrel is mainly responsible for intercepting large particles ≥5μm. When some large particles are pre-separated to the barrel wall by centrifugal force, the filtration burden on the outer barrel is reduced. This makes the filter material of the outer barrel less prone to rapid clogging by large particles, thereby extending the service life of the entire filter cartridge.

[0017] 2. The three-layer composite filter cartridge used in the central air conditioning filtration system is equipped with a locking component. When maintenance and cleaning of the inner, middle, and outer cartridges are required, the three-layer composite filter cartridge can be quickly disassembled and the cover plate separated from the filter cartridge by simply loosening the studs and rotating the bolts to release the constraint of the rotating column. This is convenient and quick, improves maintenance efficiency, reduces maintenance difficulty, and makes it easier for staff to clean, inspect, and replace each layer of the filter cartridge, ensuring the continuous and stable operation of the filtration system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the present invention in an explosion.

[0020] Figure 3 This is a top view of the filter barrel of this utility model.

[0021] Figure 4 This is a schematic diagram of the front cross-section of the locking chamber of this utility model;

[0022] Figure 5 This is an enlarged structural schematic diagram of point A of this utility model;

[0023] Figure 6 This is a partial structural schematic diagram of the connecting block of this utility model;

[0024] Figure 7 This is a partial top view of the locking assembly of this utility model.

[0025] Figure 8 This is an enlarged structural schematic diagram of point C of this utility model.

[0026] In the diagram: 1. Mounting base plate; 2. Filter barrel; 21. Inner barrel; 22. Intermediate barrel; 23. Outer barrel; 24. Rotating shaft; 25. Spiral blade; 26. Connecting block; 27. Convex limiting groove; 3. Cover plate; 4. Clearance hole; 5. Locking assembly; 51. Locking chamber; 511. Vertical plate; 52. Guide column; 53. Limiting rod; 54. Pulley; 55. Rotating column; 56. Pulley bracket; 57. Pulley groove; 58. Stabilizer; 59. Bolt; 6. Threaded hole; 7. Stud; 8. Connecting hole; 9. Insertion groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-8 This embodiment provides a technical solution: a three-layer composite filter cartridge for a central air conditioning filtration system, including a mounting base plate 1, a mounting cylinder in the middle of the mounting base plate 1, and uniformly distributed insertion slots 9 on the upper side of the mounting base plate 1, and also includes a filter barrel 2.

[0029] Filter barrel 2: It includes an inner barrel 21, a middle barrel 22, an outer barrel 23, a rotating shaft 24, and spiral blades 25. The outer barrel 23 is a stainless steel perforated mesh with washable PET cotton. The middle barrel 22 is a corrugated glass fiber structure. The inner barrel 21 is an H13 grade electret meltblown fabric structure. The lower ends of the middle barrel 22 and the outer barrel 23 are inserted into the adjacent insertion slots 9 on the lower side. The inner barrel 21, the middle barrel 22, and the outer barrel 23 are staggered. The rotating shafts 24 are evenly distributed between the middle barrel 22 and the outer barrel 23. It also includes a cover plate 3, and the middle of the cover plate 3 is also provided with an installation cylinder. The cover plate 3 is located on the upper side of the filter barrel 2. The top wall of the cover plate 3 is rotatably connected with evenly distributed rotating shafts 24. The outer arc surface of the rotating shafts 24 is provided with spiral blades 25. The filter barrel 2 also includes connecting blocks 26 and convex limiting grooves 27. The upper sides of the inner barrel 21, the middle barrel 22 and the outer barrel 23 are provided with symmetrically distributed connecting blocks 26. The upper end of the connecting blocks 26 is provided with a convex limiting groove 27. The middle part of the cover plate 3 is provided with a corresponding clearance hole 4 for each connecting block 26. The upper end of each connecting block 26 passes through the clearance hole 4. First, the worker installs the three-layer composite filter barrel into the use area. In operation, the airflow first passes through the outer barrel 23 (a structure of stainless steel perforated mesh and washable PET cotton) to intercept large particles ≥5μm. The pre-filtered airflow then passes through the middle barrel 22 (a corrugated glass fiber structure) to capture particles 1-5μm. Finally, the inner barrel 21 (an H13-grade electret meltblown fabric structure) filters particles larger than PM0.3, ensuring clean exhaust air. The inner barrel 21, middle barrel 22, and outer barrel 23 are arranged non-concentrically, forcing the airflow through an S-shaped path, extending the contact time and improving filtration efficiency. During operation, the airflow propels... The rotating spiral blades 25 between the middle barrel 22 and the outer barrel 23 generate centrifugal force to throw large particles toward the barrel wall, reducing the direct load on the outer barrel 23. The non-concentric arrangement forces the airflow to change direction, prolonging the contact time. At the same time, the airflow drives the spiral blades 25 to rotate, generating centrifugal force to throw large particles toward the barrel wall, thereby reducing the direct load on the outer barrel 23. (Due to the centrifugal force, large particles first hit the barrel wall, and when they come into contact with the filter material, the speed and impact force are reduced, reducing the probability of embedding deep into the filter material. This allows the filter material in the outer barrel to maintain good permeability, and the filtration burden is reduced.)

[0030] The filter tank 2 has a locking assembly 5 at its upper end, which includes a locking chamber 51, a guide post 52, and a limiting rod 53. The lower end of the locking chamber 51 is slidably connected to the upper outer arc surface of the cover plate 3. The upper side wall of the locking chamber 51 is threaded with studs 7 at both ends. The upper side of the cover plate 3 is provided with connecting holes 8 at both ends. The lower ends of the studs 7 are threaded to the adjacent connecting holes 8 on the lower side. The top wall of the locking chamber 51 has symmetrically distributed vertical plates 511 at both ends. A guide post 52 is provided between two adjacent vertical plates 511. The guide post 52 has symmetrically distributed limiting rods 53 slidably connected to its outer arc surface. Each limiting rod 53 is located inside an adjacent convex limiting groove 27 on its lower side. The locking assembly 5 also includes a shift post 54, a rotating post 55, a shift bracket 56, and a shift groove 57. Each limiting rod 53 has a shift post 54 on its upper side. The upper sidewall of the locking chamber 51 is rotatably connected to both the front and rear ends of a rotating post 55. Each rotating post 55 has a shift bracket 56 at its lower end. Each shift bracket 56 has a shift groove 57 at both its left and right ends. The upper ends of each shift post 54 are located inside an adjacent shift groove 57 on its upper side. Component 5 also includes stabilizing plates 58 and bolts 59. Stabilizing plates 58 are provided on the upper end of the outer arc surface of the rotating column 55, and bolts 59 are threaded to the left end of each stabilizing plate 58. Threaded holes 6 are provided at both the front and rear ends of the upper side of the locking chamber 51. The lower ends of the bolts 59 are threaded to the adjacent threaded holes 6 on the lower side. When maintenance and cleaning of the inner tub 21, the middle tub 22, and the outer tub 23 are required, the studs 7 are loosened to release the locking chamber 51 from the cover plate 3, the bolts 59 on the stabilizing plates 58 are rotated to release the constraint of the rotating column 55, and the rotating column 55 is then rotated. Pushing the lever 54 through the lever 57 of the lever 56 causes the limiting rod 53 to slide along the guide post 52 until it is located in the middle of the convex limiting groove 27. At this time, the limiting rod 53 no longer restricts the position of the convex limiting groove 27. Pulling up the locking chamber 51 will cause the limiting rod 53 to leave the convex limiting groove 27 from the middle, allowing the cover plate 3 and the filter barrel 2 to be separated in sequence. Reverse the operation, after the limiting rod 53 is inserted into the convex limiting groove 27, tighten the stud 7 and bolt 59 to ensure that the three-layer barrel is tightly fixed. When necessary, the three-layer composite filter barrel can be quickly disassembled.

[0031] The working principle of the three-layer composite filter cartridge for a central air conditioning filtration system provided by this utility model is as follows: First, the worker installs the three-layer composite filter cartridge in the area of ​​use. During operation, the airflow first passes through the outer layer 23 (stainless steel perforated mesh and washable PET cotton structure), intercepting large particles ≥5μm. The airflow after primary filtration passes through the middle layer 22 (corrugated glass fiber structure), capturing particles 1-5μm. Finally, the inner layer 21 (H13 grade electret meltblown fabric structure) filters particles larger than PM0.3, ensuring clean airflow. The inner layer 21, middle layer 22, and outer layer 23 are arranged non-concentrically, forcing the airflow to pass through in an S-shaped path, extending the contact time and improving filtration efficiency. During operation, the airflow drives the spiral blades 25 between the middle layer 22 and the outer layer 23 to rotate, generating a separation... The force throws large particles toward the barrel wall, reducing the direct load on the outer barrel 23. When maintenance and cleaning of the inner barrel 21, middle barrel 22, and outer barrel 23 are required, loosen the stud 7 to release the locking chamber 51 from the cover plate 3, rotate the bolt 59 on the stabilizing plate 58 to release the constraint of the rotating column 55, rotate the rotating column 55, and push the shifting column 54 through the shifting groove 57 of the shifting bracket 56, so that the limiting rod 53 slides along the guide column 52 until it is located in the middle of the convex limiting groove 27. At this time, the limiting rod 53 no longer restricts the position of the convex limiting groove 27. Pull up the locking chamber 51, and the limiting rod 53 will leave the convex limiting groove 27 from the middle, so that the cover plate 3 and the filter barrel 2 can be separated in sequence. Reverse the operation, after the limiting rod 53 is inserted into the convex limiting groove 27, tighten the stud 7 and the bolt 59 to ensure that the three barrels are tightly fixed.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A three-layer composite filter cartridge for a central air conditioning filtration system, comprising a mounting base plate (1), wherein the upper side of the mounting base plate (1) is provided with uniformly distributed insertion slots (9), characterized in that: It also includes a filter bucket (2); Filter barrel (2): It includes an inner barrel (21), a middle barrel (22), an outer barrel (23), a rotating shaft (24), and spiral blades (25). The lower ends of the inner barrel (21), the middle barrel (22), and the outer barrel (23) are all inserted into the adjacent insertion slots (9) on the lower side. The inner barrel (21), the middle barrel (22), and the outer barrel (23) are staggered. A rotating shaft (24) is evenly distributed between the middle barrel (22) and the outer barrel (23). Spiral blades (25) are provided on the outer arc surface of the rotating shaft (24). Wherein: the upper end of the filter barrel (2) is provided with a locking component (5).

2. The three-layer composite filter cartridge for a central air conditioning filtration system according to claim 1, characterized in that: It also includes a cover plate (3), which is located on the upper side of the filter barrel (2), and the top wall of the cover plate (3) is rotatably connected with evenly distributed rotating shafts (24).

3. A three-layer composite filter cartridge for a central air conditioning filtration system according to claim 2, characterized in that: The filter bucket (2) also includes a connecting block (26) and a convex limiting groove (27). The upper sides of the inner bucket (21), the middle bucket (22) and the outer bucket (23) are provided with symmetrically distributed connecting blocks (26). The upper end of the connecting block (26) is provided with a convex limiting groove (27). The middle part of the cover plate (3) is provided with a relief hole (4) corresponding to the connecting block (26). The upper end of the connecting block (26) passes through the relief hole (4).

4. A three-layer composite filter cartridge for a central air conditioning filtration system according to claim 3, characterized in that: The locking assembly (5) includes a locking chamber (51), a guide post (52), and a limiting rod (53). The lower end of the locking chamber (51) is slidably connected to the upper outer arc surface of the cover plate (3). The top wall of the locking chamber (51) is provided with symmetrically distributed upright plates (511) at both the front and rear ends. A guide post (52) is provided between two adjacent upright plates (511). The outer arc surface of the guide post (52) is slidably connected with symmetrically distributed limiting rods (53). The limiting rods (53) are all located inside the lower adjacent convex limiting grooves (27).

5. A three-layer composite filter cartridge for a central air conditioning filtration system according to claim 4, characterized in that: The locking assembly (5) further includes a peg (54), a rotating peg (55), a peg frame (56), and a peg groove (57). The upper side of the limiting rod (53) is provided with a peg (54). The upper side wall of the locking chamber (51) is rotatably connected to the front and rear ends of the rotating peg (55). The lower end of the rotating peg (55) is provided with a peg frame (56). The left and right ends of the peg frame (56) are provided with peg grooves (57). The upper end of the peg (54) is located inside the adjacent peg groove (57) on the upper side.

6. A three-layer composite filter cartridge for a central air conditioning filtration system according to claim 5, characterized in that: The locking assembly (5) also includes a stabilizing plate (58) and a bolt (59). The upper end of the outer arc surface of the rotating column (55) is provided with a stabilizing plate (58), and the left end of the stabilizing plate (58) is threaded with a bolt (59). The upper side of the locking chamber (51) is provided with threaded holes (6) at both the front and rear ends. The lower end of the bolt (59) is threadedly connected to the adjacent threaded hole (6) on the lower side.

7. A three-layer composite filter cartridge for a central air conditioning filtration system according to claim 4, characterized in that: The upper sidewall of the locking chamber (51) is threaded with studs (7) at both ends. The upper sidewall of the cover plate (3) is provided with connecting holes (8) at both ends. The lower end of the studs (7) is threaded to the adjacent connecting hole (8) on the lower side.

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