Sterilizing and filtering integrated multilayer composite filter screen

Abstract

The invention relates to the technical field of filter screens, in particular to a sterilization and filtration integrated multilayer composite filter screen which comprises an outer supporting filter frame assembly, the outer supporting filter frame assembly comprises an upper filter frame and a lower filter frame which are vertically and symmetrically clamped, and a plurality of flow guide supporting strips are fixed to the inner side of the outer supporting filter frame assembly in parallel at equal intervals; two adjacent flow guide supporting strips and the outer supporting filter frame assembly define a flow-through channel, an inner supporting filter frame is embedded in the outer supporting filter frame assembly, a plurality of filter strips are fixedly connected to the inner side of the inner supporting filter frame in parallel at equal intervals, and each filter strip is correspondingly arranged in the flow-through channel defined by the two flow guide supporting strips; a first filter layer is arranged at the top end of the filter strip and is of a wave-shaped structure, and the filter screen aims at solving the problem that due to the fact that an existing filter screen mostly adopts a simple stacked structure of a filter layer and a sterilization layer, the filtering and sterilization synergism is poor.

Description

Technical Field

[0001] This invention relates to the field of filter technology, specifically to a multi-layer composite filter that integrates sterilization and filtration. Background Technology

[0002] In the air purification process, the filter is the core purification component. Its main function is to intercept particulate impurities in the air, while also having the ability to remove microorganisms to prevent secondary pollution caused by microbial growth.

[0003] Existing filters mostly use a simple superposition structure of a filtration layer and a sterilization layer, resulting in poor synergy between filtration and sterilization. The filtration layer is only responsible for intercepting particulate matter, and microorganisms can easily remain and multiply in the pores, forming purification blind spots that are difficult to remove. The sterilization layer is solely responsible for sterilization. Since the sterilization layer is set up independently after the filtration layer, it is easily blocked by the accumulation of particulate matter intercepted by the previous filtration layer, resulting in a reduction in the effective sterilization area and a rapid decline in sterilization efficiency over time. Furthermore, it cannot act on the microorganisms in the pores of the filtration layer, resulting in shortcomings in the purification effect and the formation of purification blind spots. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-layer composite filter that integrates sterilization and filtration, in order to solve the problem that existing filters mostly adopt a simple superposition structure of filtration layer and sterilization layer, resulting in poor synergy between filtration and sterilization.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A multi-layer composite filter integrating sterilization and filtration includes an outer support filter frame assembly, which includes an upper filter frame and a lower filter frame that are symmetrically snapped together. Multiple flow-guiding support strips are fixed parallel to each other at equal intervals on the inner side of the outer support filter frame assembly. Adjacent flow-guiding support strips and the outer support filter frame assembly enclose a flow channel. An inner support filter frame is embedded within the outer support filter frame assembly. Multiple filter strips are fixed parallel to each other at equal intervals on the inner side of the inner support filter frame. Each filter strip is positioned within the flow channel enclosed by two flow-guiding support strips. A first filter layer is provided at the top of each filter strip. The first filter layer has a wavy structure, and antibacterial packs are evenly distributed on the inner side of each outwardly protruding arc-shaped section.

[0007] Preferably, the cross-section of the flow guide support strip is an isosceles trapezoid, and V-shaped flow diversion grooves are evenly distributed on its top along the length direction. Each V-shaped flow diversion groove has a branched flow guide groove extending along the length direction and having multiple branched channels at its bottom.

[0008] Preferably, a second filter layer is fixedly connected to the inner side of the filter strip, and the second filter layer and the first filter layer enclose a sterilization chamber, and the antibacterial pack is fixed inside the sterilization chamber.

[0009] Preferably, the first filter layer is made of flexible elastic PP non-woven fabric, and the outer layer material of the antibacterial bag is consistent with that of the first filter layer.

[0010] Preferably, a folding compensation area is reserved at the connection between the first filter layer and the filter strip.

[0011] Preferably, top support rods are evenly distributed inside each outwardly protruding arc-shaped area of ​​the first filter layer.

[0012] Preferably, the top support spring is an arc-shaped I-beam elastic rod structure adapted to the curvature of the outwardly protruding arc-shaped area.

[0013] Preferably, the pore size of the first filter layer and the second filter layer decreases sequentially along the fluid flow direction.

[0014] Preferably, the bottom end of the upper filter frame is provided with an upper mounting groove, and the top end of the lower filter frame is provided with a corresponding lower mounting groove, wherein the upper mounting groove and the lower mounting groove are adapted to match the height of the inner support filter frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The first wavy filter layer made of flexible and elastic PP non-woven fabric undergoes elastic deformation under the impact of airflow, squeezing the antibacterial pack in the sterilization chamber: on the one hand, it loosens the particles and microorganisms attached to the filter pores, and on the other hand, it promotes the full penetration of antibacterial ingredients into the gaps between the filter pores, enhancing the sterilization effect. After the impact of airflow weakens, the high-frequency vibration of the filter layer's elastic rebound can cause the residue to fall off completely, achieving self-cleaning of the filter and reducing the frequency of manual cleaning and replacement.

[0017] 2. The folding compensation area can dynamically expand and contract to offset the tensile stress generated by the repeated deformation of the first filter layer, and avoid tearing or damage at the connection between the filter layer and the filter strip due to long-term hard pulling. The top support spring rod adopts an arc-shaped I-beam structure of 304 stainless steel spring steel, which has strong resistance to pressure and deformation. It can accumulate elastic potential energy under pressure in sync with the deformation of the filter layer to achieve rapid rebound and avoid deformation residue in the filter layer. It can also buffer the direct impact of airflow on the filter layer and prevent damage caused by excessive local stress, significantly improving the structural stability and service life of the first filter layer.

[0018] 3. The airflow guide bar adopts an isosceles trapezoidal cross section to guide the airflow smoothly. The V-shaped diversion groove and bifurcated guide groove at the top, combined with the design that the groove width is smaller than the size of the large particles to be filtered, not only prevents large particles from entering the diversion channel and causing secondary blockage from the source, but also provides an alternative flow path for the airflow when the surface is close to blockage due to the accumulation of large particles. This ensures that the filter screen still has stable airflow under extreme working conditions, greatly improving the filter screen's adaptability to complex working conditions. Attached Figure Description

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

[0020] Figure 2 This is a cross-sectional structural diagram of the filter frame of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the lower filter frame of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal support filter frame of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the first filter layer of the present invention;

[0024] Figure 6 This is a cross-sectional structural diagram of the filter strip of the present invention.

[0025] In the diagram: 1. Upper filter frame; 2. Lower filter frame; 3. Upper mounting groove; 4. Lower mounting groove; 5. Inner support filter frame; 6. Filter strip; 7. First filter layer; 8. Antibacterial pack; 9. Second filter layer; 10. Top support spring rod; 11. Flow guide support strip; 12. V-shaped diversion groove; 13. Bifurcation diversion groove. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1 to 6 This invention provides a technical solution: an integrated sterilization and filtration multi-layer composite filter, including an outer support filter frame assembly. The outer support filter frame assembly serves as the basic load-bearing structure of the entire filter, including an upper filter frame 1 and a lower filter frame 2, which are symmetrically interlocked. After assembly, they form a stable frame cavity and have convenient detachable connection characteristics. The preferred embodiment is as follows: First, magnetic blocks are evenly embedded at the edge of the mating surface of the upper and lower filter frames. The magnetic attraction force enables the upper and lower filter frames to be quickly adsorbed and connected. No additional tools are required for disassembly and assembly, making the operation simple and the connection tight. Second, by cooperating with the preset groove structure of the installation equipment, the upper and lower filter frames are fixed by mechanical limiting. This outer support filter frame assembly not only provides a stable installation carrier for the subsequent inner filtration structure, but also facilitates daily cleaning, maintenance, and component replacement of the filter through its detachable design.

[0028] Multiple flow guide bars 11 are fixed parallel to each other at equal intervals on the inner side of the outer support filter frame assembly. Two adjacent flow guide bars 11 and the outer support filter frame assembly form a flow passage, providing a stable flow path for the airflow. The cross-section of the flow guide bar 11 is an isosceles trapezoid. The slope of the trapezoid guides the airflow to flow smoothly into the inner filter structure. V-shaped diversion grooves 12 are evenly distributed on the top along the length direction. Each V-shaped diversion groove 12 has a branched flow guide groove 13 extending along the length direction and having multiple branched channels at the bottom of the groove. This can further divert the airflow entering the groove, allowing the airflow to diffuse more evenly to the inner layer area.

[0029] By incorporating V-shaped diversion channels 12 and bifurcated guide channels 13, even if the top of the outer support filter frame assembly is nearly blocked due to the accumulation of large particles, the airflow can still flow smoothly through the V-shaped diversion channels 12 and bifurcated guide channels 13 of the guide support bar 11, guiding the fluid into the inner filtration structure. To adapt to this design logic, the width of a single V-shaped diversion channel 12 (i.e., the width along the length of the guide support bar 11) is adaptively designed to be smaller than the size of the large particles to be filtered. This size setting can prevent large particles from entering the diversion channel and causing secondary blockage from the source, and can also ensure airflow under extreme accumulation conditions, greatly improving the adaptability and stability of the filter under complex conditions.

[0030] An inner support filter frame 5 is embedded within the outer support filter frame assembly. This inner support filter frame serves as the core load-bearing frame of the inner filter structure and forms a stable double-layer frame structure with the outer support filter frame assembly. This provides a precise positioning reference for the subsequent installation of filter components. The preferred embedding method is as follows: the bottom end of the upper filter frame 1 is provided with an upper embedding groove 3, and the top end of the lower filter frame 2 is provided with a corresponding lower embedding groove 4. Both embedding grooves are adapted to the height of the inner support filter frame 5 (each providing half of its height for embedding). When the upper filter frame 1 and the lower filter frame 2 are docked and fixed, the upper and lower ends of the inner support filter frame 5 will be simultaneously embedded into the grooves of the upper embedding groove 3 and the lower embedding groove 4. With the limiting effect of the grooves and the clamping force of the upper and lower filter frames, the inner support filter frame is accurately positioned and firmly fixed between the inner and outer frames. This embedding design not only ensures the coaxiality of the inner support filter frame and the outer support filter frame assembly, avoiding the impact of installation deviation on the airflow path, but also, in conjunction with the detachable structure of the outer support filter frame, enables the quick disassembly and maintenance of the inner support filter frame and the inner filter components.

[0031] Multiple filter strips 6 are fixedly connected parallel to each other at equal intervals on the inner side of the inner support filter frame 5. Each filter strip 6 is correspondingly located in the flow channel enclosed by two flow guide support strips 11 (i.e., the filter strip 6 is correspondingly located between two flow guide support strips 11), forming a one-to-one match between the inner and outer layer structures, ensuring that the airflow can pass smoothly along the preset path. The top of the filter strip 6 is provided with a first filter layer 7, which has a wavy structure. This shape can not only greatly increase the filter contact area and improve the efficiency of single filtration, but also reserve space for subsequent elastic deformation. Antibacterial packs 8 are evenly distributed on the inner side of each outwardly protruding arc section. The inner side of the filter strip 6 is fixedly connected with the first... The second filter layer 9 and the first filter layer 7 enclose a sterilization chamber, in which the antibacterial pack 8 is fixed. The second filter layer 9 has a dual core function: on the one hand, it serves as a second-stage filtration structure, forming a filtration hierarchy with the first filter layer; on the other hand, it supports and fixes the antibacterial pack 8, preventing it from shifting under the impact of airflow. Furthermore, the pore size of the filter holes in the first filter layer 7 and the second filter layer 9 decreases sequentially along the fluid flow direction, thereby achieving graded progressive filtration. It first intercepts larger particles of impurities and then captures fine particles, which not only improves the overall filtration accuracy but also prevents the filter layer from clogging too quickly and extends the service life of the filter.

[0032] The first filter layer 7 is made of flexible elastic PP non-woven fabric. This material has excellent flexibility and elastic recovery ability, and can withstand repeated deformation and rebound without easily breaking. It is very suitable for the dynamic working requirements of the filter. Combined with its wave-shaped design, when the airflow passes through the filter layer, it will impact the outward convex arc-shaped area, thereby causing the arc-shaped area to undergo inward elastic deformation. The outer layer material of the antibacterial bag 8 is consistent with the first filter layer 7. This design can ensure the compatibility and fit between the antibacterial bag and the filter layer. The inner antibacterial material of the antibacterial bag is specifically adapted according to different filter media. For example, in the case of air filtration, mature antibacterial materials commonly used in the field, such as silver ions and nano zinc, can be used. Their antibacterial mechanisms and application solutions are already very well established. Since the core improvement of this application does not revolve around the innovation of antibacterial materials, the relevant material selection can be directly... Referring to existing technology, without further details, when the outwardly convex arc-shaped area of ​​the first filter layer 7 deforms under the impact of airflow, it simultaneously squeezes the antibacterial pack 8 embedded inside, causing the surface of the antibacterial pack 8 to form a tight squeezing contact with the filter pores of the first filter layer 7. This squeezing process not only effectively loosens the particles and hidden microorganisms attached to the filter pores, but also allows the antibacterial ingredients in the antibacterial pack to penetrate more fully into the gaps between the filter pores, enhancing the sterilization effect. After the airflow impact weakens, relying on the elastic recovery force of the PP non-woven fabric, the first filter layer 7 will quickly and elastically rebound, accompanied by slight high-frequency vibration. This vibration can further promote the complete removal of loosened residues, effectively preventing particles and microorganisms from remaining in the filter pores for a long time, thereby achieving the self-cleaning effect of the filter, greatly extending the service life of the filter layer, and reducing the frequency of manual cleaning and replacement.

[0033] Furthermore, with the V-shaped diversion groove 12 and the bifurcated diversion groove 13 on the flow guide support strip 11, even if the top of the outer support filter frame assembly is blocked due to the continuous accumulation of large particles, the airflow will not be restricted by the blockage area and can achieve smooth flow. These diversion structures can guide and disperse the airflow in an orderly manner, so that it can accurately and continuously impact the outward convex arc-shaped area of ​​the first filter layer 7, ensuring that the area always has stable elastic deformation and rebound ability, and will not fail due to surface blockage. As a result, the self-cleaning function of the first filter layer and the antibacterial effect of the sterilization chamber can be stably performed, effectively avoiding the overall performance degradation of the filter due to local blockage, and greatly improving the continuous working ability and reliability of the filter under complex working conditions.

[0034] Furthermore, a folding compensation area is reserved at the connection between the first filter layer 7 and the filter strip 6. This area has a flexible pleated structure, which can fully adapt to the elastic deformation process of the first filter layer 7 under the impact of airflow. When the outward convex arc-shaped area of ​​the first filter layer 7 is squeezed inward by the airflow and contracts, the folding compensation area will expand and extend synchronously, providing sufficient expansion and contraction margin for the deformation of the filter layer. When the first filter layer 7 elastically rebounds and resets, the folding compensation area will shrink and restore itself. This dynamic expansion and contraction compensation mechanism can effectively offset the tensile stress generated by the repeated deformation of the first filter layer 7, and avoid problems such as tearing and damage at the connection between the filter layer and the filter strip 6 due to long-term hard pulling, thereby significantly improving the structural stability and service life of the first filter layer 7.

[0035] Furthermore, each outwardly protruding arc-shaped area of ​​the first filter layer 7 is provided with a top support spring rod 10, which provides elastic support to the outwardly protruding arc-shaped area. Made of 304 stainless steel spring steel, the top support spring rod 10 is an arc-shaped I-beam elastic rod structure adapted to the curvature of the outwardly protruding arc-shaped area. The I-beam structure design significantly enhances the spring rod's resistance to pressure and deformation. When the first filter layer 7 is impacted and pressed inwards by airflow, the top support spring rod 10 will be compressed and contract synchronously with the deformation of the filter layer. The degree of compression is positively correlated with the elastic force generated by the rebound; the more fully compressed, the greater the accumulated elastic force. The greater the potential energy, the faster the elastic potential energy will be released when the impact force of the airflow is less than the accumulated elastic potential energy, forming a strong rebound driving force. This will cause the first filter layer 7 to quickly return to its initial shape, fundamentally avoiding the problem of deformation residue and difficulty in recovery caused by the filter layer being continuously pressured for a long time while waiting for the impact of the airflow to weaken. At the same time, the elastic support of the top support rod 10 can also effectively buffer the direct impact force of the airflow on the filter layer, preventing the filter layer from tearing or breaking due to excessive force in some areas, further improving the structural stability and service life of the first filter layer 7.

[0036] The lower end of the filter strip 6 adopts a hollow structure design. The normally flowing airflow passes through the first filter layer 7 and the second filter layer 9 in sequence, and is finally discharged through the hollow area at the lower end of the filter strip 6.

[0037] The specific steps of this solution are as follows: Assembly of inner and outer frame layers: Take out the upper filter frame 1 and lower filter frame 2 of the outer support filter frame, insert the lower end of the inner support filter frame 5, which has been assembled with the inner filter structure, into the lower mounting groove 4 of the lower filter frame 2, and then align the mating surfaces of the upper filter frame 1 and the lower filter frame 2 so that the upper end of the inner support filter frame 5 is correspondingly inserted into the upper mounting groove 3 of the upper filter frame 1, ensuring that the inner and outer frame layers are coaxially aligned. Fixing is completed according to the filter frame connection method (if it is magnetic, directly attach the mating surfaces of the upper and lower filter frames, and achieve tight connection by means of the adsorption force of the embedded magnetic block; if it is mechanical limiting, align the connected filter frame with the preset positioning pin, push it into the mounting groove structure of the installation equipment, and fix it by mechanical limiting).

[0038] Align the filter with the equipment installation position, ensuring that the filter's flow channel aligns with the equipment's airflow path. Slowly push the filter in, ensuring the outer support filter frame assembly precisely matches the equipment's slot. During filter operation, periodically observe the equipment's airflow parameters. If abnormal increases in air pressure or decreases in airflow occur, it may indicate blockage on the surface of the outer support filter frame or in the filter layer, requiring close monitoring. Regularly record filtration efficiency and antibacterial effect. If decreased filtration accuracy or insufficient antibacterial compliance is observed, check whether the antibacterial pack has failed or whether the filter layer is damaged.

[0039] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sterilization filtration integrated multi-layer composite filter screen comprising an outer support filter frame assembly, characterized in that, The outer support filter frame assembly comprises an upper filter frame (1) and a lower filter frame (2) which are symmetrically clamped, a plurality of flow guide support bars (11) are fixed in parallel and at equal intervals on the inner side of the outer support filter frame assembly, two adjacent flow guide support bars (11) and the outer support filter frame assembly form a flow-through channel, and an inner support filter frame (5) is embedded in the outer support filter frame assembly.

2. The integrated sterilization filter multi-layer composite screen according to claim 1, wherein, The cross section of the flow guide support bar (11) is isosceles trapezoidal, and a V-shaped shunt groove (12) is uniformly arranged on the top along the length direction, and the groove bottom of each V-shaped shunt groove (12) is provided with a bifurcated flow guide groove (13) extending along the length direction and having a plurality of bifurcated channels.

3. The integrated sterilization filter multilayer composite screen according to claim 1, wherein, The inner side of the filter strip (6) is fixedly connected with a second filter layer (9), and a sterilization cavity is formed between the second filter layer (9) and the first filter layer (7).

4. The integrated sterilization filter multi-layer composite screen according to claim 1, wherein, The first filter layer (7) is made of flexible elastic PP non-woven fabric material, and the outer layer material of the antibacterial bag (8) is consistent with the first filter layer (7).

5. The integrated sterilizing filter multi-layer composite screen according to claim 1, wherein, The first filter layer (7) and the filter strip (6) are connected at a folding compensation area.

6. The integrated sterilizing filter multi-layer composite screen according to claim 1, wherein, The inner side of each outwardly protruding arc region of the first filter layer (7) is provided with a top support elastic rod (10).

7. The integrated sterilizing filter multi-layer composite screen according to claim 6, characterized in that, The top support elastic rod (10) is an arc-shaped H-shaped elastic rod structure which is adapted to the curvature of the outwardly protruding arc region.

8. The integrated sterilization filter multi-layer composite screen according to claim 3, wherein, The filter hole diameters of the first filter layer (7) and the second filter layer (9) decrease in turn along the fluid flow direction.

9. The integrated sterilizing filter multi-layer composite screen according to claim 1, wherein, The bottom end of the upper filter frame (1) is provided with an upper embedding groove (3), and the top end of the lower filter frame (2) is correspondingly provided with a lower embedding groove (4), and the upper embedding groove (3) and the lower embedding groove (4) are combined and matched with the height of the inner support filter frame (5).

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