A composite air purification device

Abstract

The present invention relates to a composite air purification device, comprising a cyclone filter cartridge. The cyclone filter cartridge is a double-layer structure, comprising a filter cartridge outer wall (3) and a filter cartridge inner wall (4). The outer side of the filter cartridge inner wall (4) is provided with a primary filter screen (1), and the inner side is provided with a filter core (5). The outer side of the filter core (5) is provided with a coil (7). The filter cartridge outer wall (3) and the filter cartridge inner wall (4) are respectively connected to two ends of a power supply as positive and negative electrodes. The upper and lower ends of the cyclone filter cartridge are both provided with permanent magnets. Pulsating direct current is passed through the coil (7). Compared with the prior art, the present invention greatly improves dust removal and purification effects and prolongs the service life of the filter core. More importantly, the present invention can be applied to some special spaces, especially scientific research and industrial sites, and can remove nitrogen-containing compounds including ammonia nitrogen, nitriles, hydrazones, amines, amides, pyrrole and pyridine that cannot be treated by conventional purification devices without affecting the service life of the filter core.

Description

Technical Field

[0001] The invention relates to the field of air purifiers, in particular to a composite air purifying device. Background Art

[0002] Air purifiers, also known as "air cleaners", air fresheners, and purifiers, refer to products that can absorb, decompose or transform various air pollutants (generally including PM2.5, dust, pollen, odor, decoration pollution such as formaldehyde, bacteria, allergens, etc.), effectively improving the cleanliness of the air. They are mainly divided into household, commercial, industrial, and building. There are many different technologies and media in air purifiers, which enable it to provide clean and safe air to users. Commonly used air purification technologies include: adsorption technology, negative (positive) ion technology, catalytic technology, photocatalyst technology, super-structured light mineralization technology, HEPA high-efficiency filtration technology, electrostatic dust collection technology, etc.; material technologies mainly include: photocatalyst, activated carbon, synthetic fiber, HEPA high-efficiency material, negative ion generator, etc.

[0003] At present, the dust collectors produced by most domestic manufacturers use dust filter elements for filtering and dust removal. The compressed air containing dust enters the dust filter element through the air inlet of the dust collector, and then enters the next-level equipment through the pipe connection at the air outlet. The dust in the compressed air is filtered out by the filter element; if the dust content in the compressed air is high, a large amount of dust will directly adhere to the surface of the dust filter element, increasing the pressure difference of the entire air source system. If the pressure difference reaches a certain value, the dust filter element needs to be cleaned or replaced. In other words, the greater the amount of dust adhering to the surface of the dust filter element, the more frequently the dust filter element needs to be cleaned or replaced, which will increase the use cost of the equipment manufacturer.

[0004] The cyclone centrifugal filters commonly used on the market can handle dust larger than 5μm, but have a lower efficiency for dust below 5μm. General electrostatic dust removal devices only use electrostatic force and are limited by the airflow path, making it difficult to achieve a good dust removal effect. In general filter element filtration and chemical catalytic oxidation methods, the filter element is prone to accumulate dust and block the airflow channel, limiting the service life of the filter element. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a composite air purification device which greatly improves the dust removal and purification effect, prolongs the service life of the filter element and has high economic benefits.

[0006] Furthermore, since there are some complex volatile substances, including some ammonia nitrogen compounds, in some special spaces, especially scientific research and industrial sites, the device uses the eddy current generated by pulsating direct current to oxidize volatile organic compounds in the air, including common organic volatiles such as formaldehyde, benzene, toluene, xylene, as well as nitrogen-containing compounds such as ammonia nitrogen, nitriles, amines and amides, into harmless carbon dioxide, water and nitrogen, and does not generate deposits on the surface of the filter element, which does not affect the life of the filter element.

[0007] The object of the present invention can be achieved by the following technical scheme: a composite air purification device, including a cyclone filter cartridge, the cyclone filter cartridge is a double-layer structure, including a filter cartridge outer wall and a filter cartridge inner wall, the outer side of the filter cartridge inner wall is provided with a primary filter screen, the inner side is provided with a filter element, the outer side of the filter element is provided with a coil, the filter cartridge outer wall and the filter cartridge inner wall are respectively connected to two ends of a power supply as positive and negative poles, the upper and lower ends of the cyclone filter cartridge are provided with permanent magnets, the permanent magnets cause charged particles in the cyclone filter cartridge cavity to be subjected to an outward Lorentz force, pulsating direct current is passed through the coil, the current direction is set so that the magnetic lines of force generated in the cyclone filter cartridge cavity are in the same direction as the magnetic lines of force generated therein by the permanent magnet, and eddy current is generated in the conductive modified activated carbon filter element, which plays a role in generating hydroxyl radicals (·OH) on the catalyst surface, achieving a strong oxidation purification effect, and oxidizing organic volatiles into harmless water, carbon dioxide and nitrogen.

[0008] The gas to be treated enters the cyclone filter cartridge and is pushed by the cyclone. It is affected by the dual effects of Lorentz force and static electricity in the magnetic field. Some charged particles are enriched and separated on the outer wall of the filter cartridge and then discharged after being filtered by the filter element.

[0009] Furthermore, the primary filter is a metal filter or a carbon fiber filter, and the primary filter is connected to a power source to serve as a positive electrode or a negative electrode of the charge polarization device.

[0010] Furthermore, the inlet of the cyclone filter cartridge is connected to an air inlet fan to push air into the cyclone filter cartridge cavity for rotational motion, thereby achieving cyclone centrifugal dust removal.

[0011] Furthermore, the outer wall of the filter cartridge is a conductor, and the electrode is opposite to the electrode of the primary filter;

[0012] Furthermore, the inner wall of the filter cartridge is a conductor, and the electrode is the same as the primary filter screen electrode.

[0013] Furthermore, the filter element 5 adopts a HEPA high-efficiency filter element, and the activated carbon in the filter element is preferably a composite modified activated carbon material to achieve the catalytic reaction and purification of organic volatiles and nitrogen oxides. For example, the filter element 5 adopts a conventional commercially available HEPA high-efficiency filter element, and the activated carbon material therein is changed to a composite modified activated carbon material, and a 3-6 carbon hydroxycarboxylate ion metal salt compound is used as an active ingredient, which is added to the activated carbon, wherein the mass ratio of the active ingredient to the activated carbon is 0.1-50:99.9-50, and water is added, and the mixture is fully stirred and ground and mixed, centrifuged for dehydration or suction filtration, dried, and calcined to obtain the composite modified activated carbon material.

[0014] The active ingredient may be commercially available ferrous lactate or zinc gluconate;

[0015] Or; the active ingredient is prepared by reacting lactic acid or glyceric acid with an equivalent amount of a metal oxide or a carbonate, nitrate or chloride solution;

[0016] Alternatively, the active ingredient is obtained by catalytic oxidation of the four-carbon aldose, five-carbon aldose, and six-carbon aldose corresponding to the four-carbon aldose, five-carbon aldose, and six-carbon aldose respectively, or reacting with peroxide to obtain the corresponding sugar acid, which is then reacted with an equivalent amount of a metal oxide or a carbonate, nitrate, or chloride solution.

[0017] The metal oxide or carbonate, nitrate or chloride is one or more of the metal oxides or carbonates, nitrates or chlorides of iron, copper, zinc, cobalt, manganese, molybdenum, vanadium, nickel, chromium, vanadium and titanium.

[0018] On the one hand, the above-mentioned composite modified activated carbon material can adsorb particulate matter in the gas to be treated. On the other hand, since the coil generates induced eddy current in the filter element, it plays an electrochemical catalytic role and can cooperate with the metal active components doped in the filter element as a catalyst.

[0019] Furthermore, the S pole and the N pole of the permanent magnet are adjusted so that the cyclonic motion of the charged particles in the magnetic field in the cavity of the cyclone filter cartridge is subjected to the outward Lorentz force.

[0020] Furthermore, the coil is an enameled copper wire coil. The pulsating direct current input into the coil generates an induced current, which synergizes with the catalyst in the filter element to carry out an electrochemical catalytic reaction. At the same time, the induced current generates heat to heat the dust attached to the filter element, making it easy for it to detach from the filter element and be carried away by the cyclone, and is enriched and separated on the outer wall of the filter cartridge under the multi-effect dust removal effect.

[0021] Furthermore, a collection cylinder 8 which is easy to disassemble is provided at the bottom of the cyclone filter cylinder, and the dust enriched on the outer wall of the filter cylinder enters the bottom collection cylinder under the action of gravity and cyclone.

[0022] Furthermore, a temperature sensor is provided on the filter element to control the heating temperature of the filter element;

[0023] Furthermore, a pressure difference sensor is provided on the filter element to monitor the pressure difference of the filter element, and an alarm is sounded when the pressure difference reaches a set pressure difference parameter to remind the user to replace the filter element.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention generates eddy current in a modified activated carbon filter element with conductivity through electromagnetic induction, which generates hydroxyl radicals (·OH) on the catalyst surface, realizes strong oxidation purification, and oxidizes organic volatiles into harmless water, carbon dioxide and nitrogen, etc., greatly improving the dust removal and purification effects, and extending the service life of the filter element. More importantly, it can be applied to some special spaces, especially scientific research and industrial sites, where there are some complex volatile substances, including some ammonia nitrogen compounds. The device uses the eddy current generated by pulsating direct current to oxidize volatile organic compounds in the air, including nitrogen-containing compounds such as ammonia nitrogen, nitriles, hydrazones, amines, amides, pyrroles and pyridine, etc., in addition to common organic volatiles such as formaldehyde, benzene, toluene and xylene, into harmless carbon dioxide, water and nitrogen, and does not generate sediment on the surface of the filter element, which does not affect the service life of the filter element.

[0026] 2. The present invention achieves the purpose of composite air purification by rationally arranging the positions and processes of five purification technologies, namely, cyclone centrifugal dust removal, electrostatic dust removal, Lorentz force dust removal, filter element adsorption filtration and catalytic chemical reaction, thereby greatly improving the dust removal and purification effects, extending the service life of the filter element, and having economic benefits significantly higher than single-effect air purification products on the market.

[0027] 3. The cyclone filter cartridge of the present invention is provided with a permanent magnet 6A at the upper end and a permanent magnet 6B at the lower end, and the S and N poles of the permanent magnets are adjusted so that the charged particles are subjected to the Lorentz force outward during the cyclone motion in the magnetic field in the cavity of the cyclone filter cartridge. The problem that the cyclone centrifugal dust removal is difficult to handle dust below 5 μm is overcome, and the Lorentz force of the charged ions in the magnetic field is pushed by the cyclone, and the magnetic field is realized by the permanent magnet and the energized coil, which improves the magnetic field strength and achieves the treatment effect for dust below 5 μm.

[0028] 4. An enameled copper wire coil is arranged inside the filter element of the present invention, and pulsating direct current is passed through. The direction of the current is set so that the magnetic lines of force generated in the cavity of the cyclone filter cartridge are in the same direction as the magnetic lines of force generated by the permanent magnet therein; the pulsating direct current generates an induced current in the filter element, which plays an electrochemical catalytic role, and achieves a synergistic effect with the catalyst doped in the filter element. The induced current generates heat to heat the dust attached to the filter element, making it easy to detach from the filter element and be carried away by the cyclone, and is enriched and separated on the outer wall of the filter cartridge under the multi-effect dust removal effect.

[0029] 5. Electrostatic dust removal is a commonly used technology, but single electrostatic dust removal is difficult to achieve the expected purification effect. The induction coil of the present invention is used as a heating device for the filter element. Combined with the centrifugal force of the cyclone, it can remove dust collected in the filter element and extend the life of the filter element.

[0030] 6. The present invention arranges an enameled copper wire coil on the filter element and passes pulsating direct current to play an electrochemical catalytic role and achieve a synergistic effect with the catalyst doped with the filter element; the temperature sensor controls the temperature of the filter element to prevent excessively high temperature from affecting the adsorption effect of the filter element and excessively low temperature from affecting the catalytic reaction effect of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the composite air purification device of the present invention. DETAILED DESCRIPTION

[0032] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0033] Unless otherwise specified, the various components used in the present invention are conventional components in the art.

[0034] The filter element 5 adopts a conventional commercially available HEPA high-efficiency filter element, and the activated carbon material therein is replaced with a composite modified activated carbon material doped with metals, for example, one or more metal oxides or carbonates, nitrates, chlorides of iron, copper, zinc, cobalt, manganese, molybdenum, vanadium, nickel, chromium, vanadium, and titanium are doped, and the doping amount is 10 to 50 wt%.

[0035] Or it can be modified by the following method: a 3-6 carbon hydroxycarboxylate ion metal salt compound is used as an active ingredient, and it is added to activated carbon, wherein the mass ratio of the active ingredient to the activated carbon is 0.1-50:99.9-50, and water is added to fully stir and grind the mixture, centrifuge dehydration or suction filtration, dry, and calcine to obtain a composite modified activated carbon material. The mass of water added is 10% to 200% of the total mass of the active ingredient and the activated carbon; the calcination is firstly heated at 150-500°C for 10 minutes to 24 hours in a nitrogen-protected atmosphere, and then heated at 100-300°C for 5 minutes to 3 hours without isolating the air.

[0036] The active ingredient may be commercially available ferrous lactate or zinc gluconate;

[0037] Or; the active ingredient is prepared by reacting lactic acid or glyceric acid with an equivalent amount of a metal oxide or a carbonate, nitrate or chloride solution;

[0038] Alternatively, the active ingredient is obtained by catalytic oxidation of the four-carbon aldose, five-carbon aldose, and six-carbon aldose corresponding to the four-carbon aldose, five-carbon aldose, and six-carbon aldose respectively, or reacting with peroxide to obtain the corresponding sugar acid, which is then reacted with an equivalent amount of a metal oxide or a carbonate, nitrate, or chloride solution.

[0039] The metal oxide or carbonate, nitrate or chloride is one or more of the metal oxides or carbonates, nitrates or chlorides of iron, copper, zinc, cobalt, manganese, molybdenum, vanadium, nickel, chromium, vanadium and titanium.

[0040] Example 1

[0041] like Figure 1 As shown, a composite air purification device includes a cyclone filter cartridge, which is a double-layer structure, including a filter cartridge outer wall 3 and a filter cartridge inner wall 4. A cyclone filter cavity is formed between the filter cartridge outer wall 3 and the filter cartridge inner wall 4. The inlet 15 of the cyclone filter cartridge is connected to the air inlet fan 2. A branch pipe is also provided at the bottom of the cyclone filter cartridge cavity to return to the air inlet 15, and a regulating valve 11 is provided on the branch pipe. A filter element 5 is provided inside the filter cartridge inner wall 4, and the upper part of the filter cartridge inner wall 4 is used as an exhaust port 13 to connect to the pipeline fan 14, and a switch valve 12 is provided in the exhaust port 13.

[0042] The fan 2 pushes the air into the cyclone filter cartridge cavity and rotates to achieve cyclone centrifugal dust removal. A collection cartridge 8 that is easy to disassemble is provided at the bottom. The dust enriched on the outer wall 3 of the filter cartridge enters the bottom collection cartridge 8 under the action of gravity and cyclone so as to be disassembled and cleaned.

[0043] A primary filter screen 1 is disposed outside the inner wall 4 of the filter cartridge. The primary filter screen 1 is a metal filter screen or a carbon fiber filter screen. The primary filter screen 1 is connected to a power source and serves as a positive electrode or a negative electrode of a charge polarization device.

[0044] The outer wall 3 of the filter cartridge and the inner wall 4 of the filter cartridge are both conductors, and the outer wall 3 of the filter cartridge and the inner wall 4 of the filter cartridge are respectively connected to the two ends of the power supply as positive and negative poles. The electrode of the outer wall 3 of the filter cartridge is opposite to the electrode of the primary filter screen 1; the electrode of the inner wall 4 of the filter cartridge is the same as the electrode of the primary filter screen 1.

[0045] A filter element 5 is provided on the inner side of the inner wall 4 of the filter cartridge, and a coil 7 is provided on the outer side of the filter element 5. The coil 7 is an enameled copper wire coil. The pulsating direct current input into the coil 7 generates an induced current, which can perform induction heating on the filter element 5. The filter element 5 adopts a conventional commercially available HEPA high-efficiency filter element, and the activated carbon material therein is changed to a composite modified activated carbon material. The composite modified activated carbon material is prepared by the following method: purchased chemically pure ferrous lactate is added to activated carbon, wherein the mass ratio of the active ingredient to the activated carbon is 50:50, and water is added and fully stirred and ground and mixed. The amount of water added is: The mass ratio of the active ingredient to the total mass of the activated carbon is 1:1; centrifugal dehydration or suction filtration, drying, first heating at 300°C for 10 hours in an atmosphere of nitrogen protection, and then heating at 300°C for 1 hour without isolating from the air to obtain a ferrous lactate modified nano-activated carbon material product. On the one hand, the material can adsorb particulate matter in the gas to be treated. On the other hand, since the coil 7 generates an induced current in the filter element, it plays an electrochemical catalytic role, which can cooperate with the iron catalyst doped in the filter element to achieve efficient catalytic purification reaction of organic volatiles and nitrogen oxides.

[0046] The filter element 5 itself can also achieve a good effect of removing volatile organic compounds and nitrogen oxides in the air, but it is affected by the ambient temperature and cannot ensure the catalytic reaction effect. The present invention arranges an enameled copper wire coil 7 outside the filter element 5 and passes pulsating direct current, and uses the eddy current generated by electromagnetic induction to play an electrochemical catalytic role, thereby achieving a synergistic effect with the catalyst doped with the filter element, greatly improving the catalytic effect and stability; at the same time, a temperature sensor 9 and a pressure difference sensor 10 are arranged on the filter element 5, and the temperature sensor 9 controls the filter element temperature to prevent excessively high temperature from affecting the adsorption effect of the filter element and excessively low temperature from affecting the catalytic reaction effect of the filter element. The pressure difference sensor 10 monitors the pressure difference of the filter element 5, and alarms after the pressure difference reaches the set pressure difference parameter to remind the filter element to be replaced.

[0047] At the same time, the induced current generates heat to heat the dust attached to the filter element 5, making it easy to separate from the filter element 5 and be taken away by the cyclone, and enriched and separated on the outer wall 3 of the filter cartridge under the multi-effect dust removal effect. Electrostatic dust removal is a common technology, but single electrostatic dust removal is difficult to achieve the expected purification effect. The induction coil 7 of the present invention is used as a heating device for the filter element, combined with the centrifugal force of the cyclone, which can remove the dust collected in the filter element and extend the service life of the filter element.

[0048] The upper and lower ends of the cyclone filter cartridge are both provided with permanent magnets. Figure 1As shown, the annular permanent magnet 6A at the upper end and the annular permanent magnet 6B at the lower end adjust the S pole and the N pole of the permanent magnet so that the cyclonic motion of the charged particles in the magnetic field in the cavity of the cyclone filter cartridge is subjected to the outward Lorentz force, and the coil 7 is passed through a pulsating direct current, and the current direction is set so that the magnetic lines of force generated in the cavity of the cyclone filter cartridge are in the same direction as the magnetic lines of force generated by the permanent magnet therein, so that the magnetic field in the cavity of the cyclone filter cartridge is realized by the permanent magnet and the energized coil, thereby improving the magnetic field strength, cooperating with the centrifugal force of the cyclone, and achieving the treatment effect for dust below 5μm.

[0049] The primary filter screen 1, the outer wall 3 of the filter cartridge and the inner wall 4 of the filter cartridge are connected to the electric field. In this embodiment, a 220V electric field is taken as an example, wherein the outer wall 3 of the filter cartridge serves as the positive electrode, and the primary filter screen 1 and the inner wall 4 of the filter cartridge serve as the negative electrode (it can also be vice versa). The gas to be treated is input into the cavity of the cyclone filter cartridge through the fan 2, and is pushed by the cyclone to rotate in the cavity. At the same time, since the primary filter screen 1, the outer wall 3 of the filter cartridge and the inner wall 4 of the filter cartridge form an electric field, the particulate matter in the gas to be treated is charged, and under the dual enhanced magnetic field force of the permanent magnet and the energized coil, the charged particles are subjected to the outward Lorentz force during the cyclonic motion in the magnetic field in the cavity of the cyclone filter cartridge, so that a part of the charged particles are enriched on the outer wall 3 of the filter cartridge, and the enriched dust enters the bottom collection cylinder 8 under the action of gravity and the cyclone for fixed disassembly and cleaning. The gas carries another part of the particles through the primary filter 1 for preliminary filtration, and the filter element 5 for further filtration. The pulsating direct current passed through the coil 7 generates induced current and heat in the filter element 5, heating the dust attached to the filter element 5, making it easy to detach from the filter element and be taken away by the cyclone. Under the multi-effect dust removal effect, the dust is enriched and separated on the outer wall 3 of the filter cartridge. At the same time, the coil 7 passes through a pulsating current of 20kHz, 100mA, which plays an electrochemical catalytic role, realizing a synergistic effect with the catalyst doped in the filter element 5 to remove volatile organic compounds and nitrogen oxides in the gas. Finally, the purified gas is discharged from the exhaust port 13.

[0050] Comparative Example

[0051] The device is the same as that of Embodiment 1, but the pulsating direct current is not supplied to the coil 7 during operation.

[0052] Test method: According to GB50325-2020 "Standard for Indoor Environmental Pollution Control of Civil Construction Engineering" implemented on August 1, 2020, the control content of ammonia is:

[0053]

[0054] Taking into account the use of air purifiers and related purification technologies, the concentration of general pollutants will not deviate too much from the standard and should be within one order of magnitude. The test here is carried out at 5-7 times.

[0055] Further consideration is that in some special spaces, especially in scientific research and industrial sites, there are some complex volatile pollutants, including common organic volatile pollutants such as formaldehyde, benzene, toluene and xylene, as well as nitrogen-containing compounds such as ammonia nitrogen, nitriles, hydrazones, amines, amides, pyrrole and pyridine. Purification tests are also carried out and the concentration of air pollutant test samples refers to the range of ammonia.

[0056] The test method refers to GB / T 18801-2015 "Air Purifier". The 30m 3 The test was carried out in an experimental chamber, where the air tightness (air change frequency) was ≤ 0.05 times / hour and the mixing degree was > 80%.

[0057] Configure the following target pollutants:

[0058]

[0059] The purification rate results are shown in the following table:

[0060]

[0061] As can be seen from the above table, the device has a good purification effect on nitrogen-containing compounds such as ammonia nitrogen, nitriles, hydrazones, amines, amides, pyrrole and pyridine, and generates eddy current in the conductive modified activated carbon filter element, which enhances the oxidation purification effect.

[0062] The device of the present invention is placed in an ordinary living area for air purification. For volatile organic compounds in the air, such as common organic volatiles such as formaldehyde, benzene, toluene, and xylene, its effect is equivalent to that of conventional commercially available air purification devices, and the service life is longer. If it is placed in a special place, such as a laboratory containing a high level of nitrogen-containing compounds, it is difficult for ordinary purification devices to achieve a good purification effect. However, the device of the present invention uses the eddy current generated by pulsating direct current to oxidize volatile organic compounds in the air, in addition to common organic volatiles such as formaldehyde, benzene, toluene, and xylene, as well as nitrogen-containing compounds such as ammonia nitrogen, nitriles, hydrazones, amines, amides, pyrroles and pyridine, into harmless carbon dioxide, water and nitrogen, and does not generate deposits on the surface of the filter element, which does not affect the service life of the filter element.

Claims

1. A composite air purification device, characterized in that: The cyclone filter cartridge comprises a double-layer structure, comprising a filter cartridge outer wall (3) and a filter cartridge inner wall (4), the outer side of the filter cartridge inner wall (4) is provided with a primary filter screen (1), the inner side of the filter cartridge inner wall (5), the outer side of the filter cartridge inner wall (3) and the filter cartridge inner wall (4) are respectively connected to two ends of a power supply as positive and negative poles, the upper and lower ends of the cyclone filter cartridge are provided with permanent magnets, the permanent magnets cause charged particles in the cyclone filter cartridge cavity to be subjected to an outward Lorentz force, a pulsating direct current is passed through the coil (7), and the current direction is set so that the magnetic lines of force generated in the cyclone filter cartridge cavity are in the same direction as the magnetic lines of force generated therein by the permanent magnet, and a vortex current is generated in the modified activated carbon filter element having conductivity; The coil (7) is an enameled copper wire coil. The pulsating direct current input into the coil (7) generates an induced current, which cooperates with the catalyst in the filter element (5) to perform an electrochemical catalytic reaction. At the same time, the induced current generates heat to heat the dust attached to the filter element (5).

2. The composite air purification device according to claim 1, characterized in that: The primary filter (1) is a metal filter or a carbon fiber filter. The primary filter (1) is connected to a power source and serves as a positive electrode or a negative electrode of a charge polarization device. The outer wall (3) of the filter cartridge is a conductor, and its electrode is opposite to that of the primary filter (1). The inner wall (4) of the filter cartridge is a conductor, and the electrode is the same as the electrode of the primary filter (1).

3. The composite air purification device according to claim 1, characterized in that: The inlet of the cyclone filter cartridge is connected to an air inlet fan (2).

4. The composite air purification device according to claim 1, characterized in that: The filter element (5) is made of HEPA high-efficiency filter element composite modified activated carbon material.

5. The composite air purification device according to claim 1, characterized in that: The S pole and N pole of the permanent magnet are adjusted so that the cyclonic motion of the charged particles in the magnetic field in the cavity of the cyclone filter cartridge is subjected to the outward Lorentz force.

6. The composite air purification device according to claim 1, characterized in that: A collection cylinder (8) which is easy to disassemble is arranged at the bottom of the cyclone filter cylinder.

7. The composite air purification device according to claim 1, characterized in that: A temperature sensor (9) is provided on the filter element (5).

8. The composite air purification device according to claim 1, characterized in that: The filter element (5) is provided with a pressure difference sensor (10) to monitor the pressure difference of the filter element (5) and to alarm when the pressure difference reaches a set pressure difference parameter.

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