Air filter with multi-layer composite filter element

Abstract

The utility model discloses a multilayer composite filter element air filter, which comprises a filter assembly and a composite filter element structure, the composite filter element structure comprises a support inner net layer and a support outer net layer which are fixedly connected through a connecting rod, and the outer side of the support outer net layer is uniformly coated with a titanium dioxide coating. A melt-blown cloth layer, an HEPA filter layer and a honeycomb structure layer are sequentially arranged between the supporting inner net layer and the supporting outer net layer from inside to outside, and bee holes of the honeycomb structure layer are evenly filled with activated carbon particles. The composite filter element structure comprises a supporting inner net layer, a supporting outer net layer, a melt-blown cloth layer, an HEPA (High Efficiency Particulate Air) filter layer and a honeycomb structure layer, wherein active carbon particles are filled in bee holes of the honeycomb structure layer. And the multi-layer design can effectively intercept particulate matters with different particle sizes, and meanwhile, the activated carbon particles can adsorb harmful gas and peculiar smell in the air, so that the air purification efficiency and effect are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of air filter technology, specifically to a multi-layer composite filter air filter. Background Technology

[0002] With the advancement of industrialization and the intensification of environmental pollution, indoor and outdoor air quality has become a focus of public concern. Pollutants such as PM2.5, dust, bacteria, viruses, formaldehyde, and volatile organic compounds (VOCs) in the air seriously threaten human health, making the demand for high-efficiency air filtration technology increasingly urgent. As a core device for air purification, air filters are widely used in homes, medical settings, and industries, and their filtration efficiency, lifespan, and functional versatility have become key directions for technological development.

[0003] Traditional air filters mostly use single-layer or simple composite filter elements (such as a single meltblown fabric or HEPA filter layer), which can only intercept particulate matter and cannot simultaneously handle gaseous pollutants (such as formaldehyde and odors). Moreover, the sterilization methods of existing filters mostly rely on chemical agents (such as antibacterial agents) or single ultraviolet irradiation, which has limitations. In addition, traditional filter elements lack an automatic cleaning mechanism. After long-term use, the accumulation of particulate matter will lead to increased resistance and reduced airflow, requiring frequent filter replacement and increasing operating costs. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer composite filter air filter to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer composite filter air filter, comprising a filter assembly and a composite filter structure, wherein the filter assembly comprises a support housing and a connecting pipe disposed at the bottom of the support housing, and annular UV lamps are uniformly installed on the inner wall of the support housing, an air inlet pipe is installed on one side of the connecting pipe, and a sealing plate is installed inside the connecting pipe below the air inlet pipe via a rotating shaft, an air outlet pipe is disposed on one side of the support housing, and a backflush pipe is connected to one side of the air outlet pipe;

[0006] The composite filter structure includes an inner support mesh layer and an outer support mesh layer fixedly connected by a connecting rod. The outer support mesh layer is uniformly coated with a titanium dioxide coating. A meltblown fabric layer, a HEPA filter layer, and a honeycomb structure layer are arranged sequentially from the inside to the outside between the inner support mesh layer and the outer support mesh layer. The honeycomb structure layer is uniformly filled with activated carbon particles inside its pores.

[0007] Furthermore, both the composite filter element structure and the supporting housing are cylindrical structures, and a chamber is provided between the composite filter element structure and the supporting housing, with the inner wall of the chamber coated with an anti-corrosion coating.

[0008] Furthermore, limiting rings are provided at both the upper and lower ends of the chamber, and the inner diameter of the two limiting rings matches the outer diameter of the composite filter structure.

[0009] Furthermore, an intake solenoid valve, an exhaust solenoid valve, and a backflush solenoid valve are respectively provided on the intake pipe, the exhaust pipe, and the backflush pipe is connected to the exhaust pipe side between the exhaust solenoid valve and the support housing.

[0010] Furthermore, a micro motor with its output end connected to the sealing plate is installed on the outside of the connecting pipe, and a flange for connecting to an external dust collection device is provided at one end of the connecting pipe.

[0011] Furthermore, the meltblown fabric layer is folded to form a wave-shaped structure, and the top of each wave is fixed to one side of the HEPA filter layer by ultrasonic welding.

[0012] Furthermore, the top of the support housing is provided with an inspection port, and a detachable sealing cover is installed on the inspection port, and the sealing cover is connected to the support housing by bolts.

[0013] Furthermore, the number of connecting rods is 3, and the 3 connecting rods are evenly distributed along the circumference of the inner supporting mesh layer and the outer supporting mesh layer.

[0014] This utility model provides a multi-layer composite filter air filter, which has significant advantages over the prior art, specifically in the following aspects:

[0015] 1. The composite filter structure of this utility model includes an inner supporting mesh layer, an outer supporting mesh layer, a melt-blown fabric layer, a HEPA filter layer, and a honeycomb structure layer, with activated carbon particles filling the pores of the honeycomb structure layer. This multi-layered design effectively intercepts particles of different sizes, while the activated carbon particles adsorb harmful gases and odors from the air, significantly improving the efficiency and effectiveness of air purification. The outer supporting mesh layer is uniformly coated with a titanium dioxide coating, which, under the irradiation of a ring-shaped UV lamp, can produce a photocatalytic reaction, decomposing organic pollutants in the air and further purifying the air.

[0016] 2. The inner wall of the support housing is uniformly equipped with ring-shaped UV lamps, which not only effectively kill bacteria and viruses in the air, but also ensure that all parts of the filter element are heated evenly, preventing filter element deformation or efficiency reduction caused by uneven heating. The inner wall of the chamber is coated with an anti-corrosion coating, which effectively prevents corrosion of the filter element and housing caused by environmental factors during long-term use, extending the service life of the equipment.

[0017] 3. The inlet pipe, outlet pipe, and backflush pipe are equipped with inlet solenoid valves, outlet solenoid valves, and backflush solenoid valves, respectively. An intelligent control system enables precise control of airflow, improving the filter's operating efficiency. The backflush pipe, connected to the outlet pipe side between the outlet solenoid valve and the support housing, allows for backwashing when the filter element becomes clogged, effectively restoring its filtration performance and extending its service life. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of the composite filter element of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the composite filter element of this utility model;

[0022] Figure 4 This is a bottom view of the internal structure of the connecting pipe of this utility model;

[0023] In the diagram: 1. Filter assembly; 101. Support housing; 102. Annular UV lamp tube; 103. Limiting ring; 104. Chamber; 105. Connecting pipe; 2. Sealing cap; 3. Composite filter element structure; 301. Supporting outer mesh layer; 302. Supporting inner mesh layer; 303. Connecting rod; 304. Titanium dioxide coating; 305. Honeycomb structure layer; 306. HEPA filter layer; 307. Meltblown fabric layer; 308. Activated carbon particles; 4. Inlet pipe; 401. Inlet solenoid valve; 5. Sealing plate; 501. Micro motor; 502. Flange; 6. Outlet pipe; 601. Outlet solenoid valve; 7. Backflush pipe; 701. Backflush solenoid valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the 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 scope of protection of the present utility model.

[0025] Please see Figure 1-4An embodiment of this utility model is provided: a multi-layer composite filter air filter, including a filter assembly 1 and a composite filter structure 3. Both the composite filter structure 3 and the support housing 101 are cylindrical structures, and a chamber 104 is provided between the composite filter structure 3 and the support housing 101. The inner wall of the chamber 104 is coated with an anti-corrosion coating.

[0026] Limiting rings 103 are provided at both the upper and lower ends of the chamber 104, and the inner diameter of the two limiting rings 103 matches the outer diameter of the composite filter structure 3.

[0027] like Figure 1 As shown, the multi-layer composite filter air filter of this utility model mainly includes a filter assembly 1 and a composite filter structure 3. The filter assembly 1 is mainly composed of a support housing 101, which has a cylindrical structure and good mechanical strength and stability. The composite filter structure 3 is also a cylindrical structure to facilitate its cooperation with the support housing 101.

[0028] A chamber 104 is provided between the composite filter element structure 3 and the supporting housing 101. The presence of the chamber 104 not only provides installation space for the composite filter element structure 3, but also facilitates air circulation and the filtration process. To prevent corrosion of the inner wall of the chamber 104 due to long-term use, the inner wall of the chamber 104 is coated with an anti-corrosion coating. This anti-corrosion coating is preferably an epoxy resin coating or a fluorocarbon coating, which has good corrosion resistance and adhesion.

[0029] Limiting rings 103 are provided at both the upper and lower ends of the chamber 104. The main function of the limiting rings 103 is to fix and limit the composite filter element structure 3, ensuring that it will not be displaced during use. The inner diameter of each limiting ring 103 matches the outer diameter of the composite filter element structure 3 to ensure that the composite filter element structure 3 can be smoothly installed and tightly fixed in the chamber 104.

[0030] The limiting ring 103 is preferably made of corrosion-resistant materials, such as stainless steel or engineering plastics, to ensure its stability and reliability in long-term use.

[0031] The filter assembly 1 includes a support housing 101 and a connecting pipe 105 disposed at the bottom of the support housing 101. Annular UV lamps 102 are uniformly installed on the inner wall of the support housing 101. An air inlet pipe 4 is installed on one side of the connecting pipe 105. A sealing plate 5 is installed inside the connecting pipe 105 below the air inlet pipe 4 via a rotating shaft. A micro motor 501 with its output end connected to the sealing plate 5 is installed on the outer side of the connecting pipe 105. A flange 502 connected to an external dust collection device is provided at one end of the connecting pipe 105.

[0032] The support housing 101 features a cylindrical design and is made of stainless steel or high-strength plastic to ensure it is not easily deformed during long-term use. The inner wall of the housing is smooth to reduce airflow resistance. An opening is provided at the top of the housing for installing and maintaining the annular UV lamp tube 102.

[0033] The annular UV lamps 102 are evenly distributed on the inner wall of the supporting housing 101. The lamps are made of high-efficiency ultraviolet emitting material, which can effectively kill bacteria and viruses in the air. The power cord of the lamps is led out through the sealing hole on the housing and connected to an external power source.

[0034] The connecting pipe 105 is located at the bottom of the support housing 101, is cylindrical, and is made of the same material as the support housing. The inner diameter of the connecting pipe 105 is reasonably designed to ensure smooth airflow. One end of the connecting pipe 105 is sealed to the bottom of the support housing 101, and the other end is open for mounting the flange 502.

[0035] The intake pipe 4 is installed on one side of the connecting pipe 105 to ensure a tight seal.

[0036] The sealing plate 5 is installed inside the connecting pipe 105, below the air intake pipe 4, via a rotating shaft. The sealing plate 5 is made of lightweight material with a smooth surface to reduce airflow resistance. Bearings are provided at both ends of the rotating shaft to ensure that the sealing plate 5 rotates freely.

[0037] The micro motor 501 is installed on the outside of the connecting pipe 105, and its output end is connected to the sealing plate 5 through a transmission mechanism. The motor uses a DC power supply with moderate power, which can drive the sealing plate 5 to rotate smoothly.

[0038] Flange 502 is located at one end of the connecting pipe 105 and adopts a standard flange design for easy connection to external dust collection equipment. Flange 502 is made of stainless steel, which has strong corrosion resistance.

[0039] An air outlet pipe 6 is provided on one side of the support housing 101, and a backflow pipe 7 is connected to one side of the air outlet pipe 6.

[0040] An intake solenoid valve 401, an exhaust solenoid valve 601, and a backflush solenoid valve 701 are respectively installed on the intake pipe 4, the exhaust pipe 6, and the backflush pipe 7 is connected to the exhaust pipe 6 side between the exhaust solenoid valve 601 and the support housing 101.

[0041] Vent pipe 6: Vent pipe 6 is located on one side of the support housing 101 and is used to exhaust gas from inside the system. The vent pipe 6 can be made of corrosion-resistant metal or plastic.

[0042] Backflush pipe 7: Backflush pipe 7 is connected to the outlet pipe 6 side between the outlet solenoid valve 601 and the support housing 101. Its function is to reverse the flow of gas into the system when backflush is required, so as to achieve a specific function.

[0043] Intake pipe 4: The intake pipe 4 is located on the other side of the support housing 101 and is used to introduce external gas into the system. The material and size design of the intake pipe 4 are similar to those of the exhaust pipe 6 to ensure smooth gas flow.

[0044] Intake solenoid valve 401: The intake solenoid valve 401 is installed on the intake pipe 4 and is used to control the entry of external gas. This solenoid valve is electromagnetically driven and can quickly respond to control signals to achieve precise gas control.

[0045] Exhaust solenoid valve 601: The exhaust solenoid valve 601 is installed on the exhaust pipe 6 and is used to control the discharge of gas inside the system. Its working principle is similar to that of the intake solenoid valve 401, and the gas is switched on and off by electromagnetic drive.

[0046] Backflush solenoid valve 701: The backflush solenoid valve 701 is located on the backflush pipe 7 and is used to control the flow of backflush gas. The design of this solenoid valve should ensure that it can open and close rapidly during the backflush process to achieve precise control of the backflush process.

[0047] The composite filter structure 3 includes a supporting inner mesh layer 302 and a supporting outer mesh layer 301 fixedly connected by connecting rods 303. There are 3 connecting rods 303, and the 3 connecting rods 303 are evenly distributed along the circumference of the supporting inner mesh layer 302 and the supporting outer mesh layer 301.

[0048] The outer side of the outer mesh layer 301 is uniformly coated with a titanium dioxide coating 304, and the inner mesh layer 302 and the outer mesh layer 301 are arranged sequentially from the inside to the outside with a meltblown fabric layer 307, a HEPA filter layer 306 and a honeycomb structure layer 305.

[0049] The honeycomb structure layer 305 is uniformly filled with activated carbon particles 308 inside the honeycomb pores.

[0050] The meltblown fabric layer 307 is folded to form a wave-shaped structure, and the top of each wave is fixed to one side of the HEPA filter layer 306 by ultrasonic welding.

[0051] The composite filter element structure 3 mainly includes the following parts:

[0052] Supporting outer mesh layer 301: This layer is located on the outside of the composite filter structure, providing support and protection for the overall structure.

[0053] Supporting inner mesh layer 302: This layer is located on the inside of the composite filter structure and also plays a supporting role.

[0054] Link 303: Used to fix and connect the inner mesh layer 302 and the outer mesh layer 301. There are 3 links, which are evenly distributed along the circumference of the inner mesh layer 302 and the outer mesh layer 301.

[0055] Titanium dioxide coating 304: uniformly coated on the outer side of the supporting outer mesh layer 301, it has the function of photocatalytic degradation of harmful substances.

[0056] Honeycomb structure layer 305: Located between the inner support mesh layer 302 and the outer support mesh layer 301, its honeycomb pores are uniformly filled with activated carbon particles 308.

[0057] HEPA filter layer 306: Located on the outside of the honeycomb structure layer 305, it is used to efficiently filter fine particulate matter in the air.

[0058] Meltblown fabric layer 307: Located inside the HEPA filter layer 306, it is folded to form a wave-shaped structure, and the top of each wave is fixed to one side of the HEPA filter layer 306 by ultrasonic welding.

[0059] The top of the support housing 101 is provided with an inspection port, and a detachable sealing cover 2 is installed on the inspection port. The sealing cover 2 is connected to the support housing 101 by bolts.

[0060] The support housing device of this utility model includes a support housing 101, an inspection port, and a removable sealing cover 2. The inspection port is provided on the top of the support housing 101. The specific position of the inspection port can be adjusted according to actual needs, but it is preferably located in the center of the top of the support housing 101 to facilitate maintenance operations.

[0061] A removable sealing cover 2 is installed on the access port. The design of the sealing cover 2 allows it to tightly cover the access port, ensuring the airtightness of the interior of the support housing 101. The sealing cover 2 is bolted to the support housing 101. To improve the sealing performance, a sealing gasket can be placed on the contact surface between the sealing cover 2 and the support housing 101. The sealing gasket is preferably made of rubber material, which has good elasticity and sealing performance, and can effectively prevent dust, moisture, etc. from the external environment from entering the interior of the support housing 101.

[0062] When this application embodiment is used,

[0063] The composite filter element structure 3 is vertically inserted into the chamber 104 through the top opening of the support housing 101, ensuring that the outer diameter of the composite filter element structure 3 is closely matched with the inner diameter of the upper and lower limiting rings 103. The limiting rings 103 fix the position of the filter element and prevent displacement.

[0064] Open the intake solenoid valve 401 and the exhaust solenoid valve 601, and close the backflow solenoid valve 701. External air enters the connecting pipe 105 from the intake pipe 4. At this time, the sealing plate 5 rotates to the closed state under the drive of the micro motor 501, and the air enters the interior of the support housing 101 through the connecting pipe 105.

[0065] Air flows from the inside to the outside of the composite filter structure 3, passing sequentially through the inner support mesh layer 302, the meltblown fabric layer 307, the HEPA filter layer 306, and the outer support mesh layer 301. The wavy meltblown fabric layer 307 increases the filtration area and intercepts large dust particles. The HEPA filter layer 306 efficiently intercepts small particles. The activated carbon particles 308 in the honeycomb structure layer 305 adsorb odors and harmful gases. Under the irradiation of the annular UV lamp tube 102 (wavelength 254nm or 365nm), the titanium dioxide coating 304 photocatalytically decomposes organic pollutants such as formaldehyde and VOCs in the air. Finally, the air is discharged through the exhaust pipe 6, completing the purification process.

[0066] When backflushing is required, close the inlet solenoid valve 401 and the outlet solenoid valve 601, and open the backflushing solenoid valve 701. Compressed air enters the support housing 101 from the backflushing pipe 7 and flows in reverse through the composite filter structure 3 (flowing from the outside to the inside). At the same time, the micro motor 501 drives the sealing plate 5 to rotate and open, and the backflushing airflow carries the dust and particles accumulated on the surface of the filter element into the dust collection equipment through the connecting pipe 105.

[0067] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0068] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0069] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0070] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-layer composite filter air filter, characterized in that: The filter assembly (1) includes a filter assembly (1) and a composite filter element structure (3). The filter assembly (1) includes a support housing (101) and a connecting pipe (105) disposed at the bottom of the support housing (101). The inner wall of the support housing (101) is uniformly equipped with annular UV lamp tubes (102). An air inlet pipe (4) is installed on one side of the connecting pipe (105). A sealing plate (5) is installed inside the connecting pipe (105) below the air inlet pipe (4) through a rotating shaft. An air outlet pipe (6) is disposed on one side of the support housing (101). A backflow pipe (7) is connected to one side of the air outlet pipe (6). The composite filter structure (3) includes a supporting inner mesh layer (302) and a supporting outer mesh layer (301) fixedly connected by a connecting rod (303). The outer side of the supporting outer mesh layer (301) is uniformly coated with a titanium dioxide coating (304). A meltblown cloth layer (307), a HEPA filter layer (306) and a honeycomb structure layer (305) are arranged sequentially from the inside to the outside between the supporting inner mesh layer (302) and the supporting outer mesh layer (301). The honeycomb structure layer (305) is uniformly filled with activated carbon particles (308) inside the honeycomb pores.

2. The multi-layer composite filter air filter according to claim 1, characterized in that: The composite filter element structure (3) and the support shell (101) are both cylindrical structures, and a chamber (104) is provided between the composite filter element structure (3) and the support shell (101). The inner wall of the chamber (104) is coated with an anti-corrosion coating.

3. The multi-layer composite filter air filter according to claim 2, characterized in that: Limiting rings (103) are provided at both the upper and lower ends of the chamber (104), and the inner diameter of the two limiting rings (103) matches the outer diameter of the composite filter structure (3).

4. The multi-layer composite filter air filter according to claim 1, characterized in that: The intake pipe (4), the exhaust pipe (6) and the backflush pipe (7) are respectively equipped with an intake solenoid valve (401), an exhaust solenoid valve (601) and a backflush solenoid valve (701), and the backflush pipe (7) is connected to the exhaust pipe (6) side between the exhaust solenoid valve (601) and the support housing (101).

5. The multi-layer composite filter air filter according to claim 1, characterized in that: A micro motor (501) with its output end connected to the sealing plate (5) is installed on the outside of the connecting pipe (105), and a flange (502) connected to an external dust collection device is provided at one end of the connecting pipe (105).

6. The multi-layer composite filter air filter according to claim 1, characterized in that: The meltblown fabric layer (307) is folded to form a wave-shaped structure, and the top of each wave is fixed to one side of the HEPA filter layer (306) by ultrasonic welding.

7. The multi-layer composite filter air filter according to claim 1, characterized in that: The top of the support housing (101) is provided with an inspection port, and a detachable sealing cover (2) is installed on the inspection port. The sealing cover (2) is connected to the support housing (101) by bolts.

8. The multi-layer composite filter air filter according to claim 1, characterized in that: The number of connecting rods (303) is 3, and the 3 connecting rods (303) are evenly distributed along the circumference of the inner supporting mesh layer (302) and the outer supporting mesh layer (301).

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