An electrically heated self-regenerating activated carbon air conditioner filter

Abstract

This invention provides an electrothermal automatic regenerating activated carbon air conditioner filter. It includes a humidity adaptive adjustment module, an electrostatic dust removal module, and a self-regenerating adsorption module, arranged sequentially along the airflow direction within the outer shell and its interior. The humidity adaptive adjustment module regulates the humidity of the air before it enters the electrostatic dust removal module to the optimal range of 45-75%. The electrostatic dust removal module includes an electrostatic generation unit and an electrostatic dust collection unit, employing a low-pressure, low-ozone design. The self-regenerating adsorption module includes honeycomb activated carbon loaded with MnO2 catalyst and a PI heating membrane sandwiched within it, used for adsorbing gaseous pollutants and electrothermally regenerating them. The control module controls humidity adjustment based on sensor feedback signals and initiates heating regeneration when adsorption is saturated. This invention ensures stable and efficient electrostatic dust removal through humidity adjustment and achieves high purification efficiency, low ozone emissions, low maintenance costs, and high safety and reliability through electrothermal regeneration.

Description

Technical Field

[0001] This invention relates to the field of air conditioning air purification technology, specifically to an electrically heated automatic regenerating activated carbon air conditioning filter. Background Technology

[0002] As the core equipment for indoor air conditioning, the purification effect of the air conditioner's return air filtration system directly affects indoor air quality. Electrostatic dust removal technology, due to its advantages such as high efficiency in capturing fine particulate matter such as PM2.5 and low air resistance, is gradually being applied to the field of air conditioning filtration.

[0003] However, the effectiveness of electrostatic precipitators is significantly affected by ambient humidity. In high-humidity environments (such as summer and southern regions), water molecules in the air alter the discharge characteristics of the electric field, leading to unstable discharge and decreased charging efficiency, thus drastically reducing dust removal efficiency. In low-humidity environments (such as winter and air conditioning heating), dry air is prone to abnormal discharge, increasing the risk of ozone generation. This performance instability caused by humidity fluctuations makes it difficult for existing electrostatic precipitators to maintain high efficiency and safe purification effects over long periods under different climatic conditions and air conditioning operating modes.

[0004] For example, patent CN121323081A discloses an electrostatic dust removal module and an air conditioner. By covering the electrode surface with an insulating layer to prevent electric arcing, and by setting up supports and limiting structures to ensure the stable positional relationship between the positive and negative electrodes, it guarantees a uniform electric field distribution and improves dust removal efficiency. This solution achieves beneficial effects in terms of electrode structure stability and arc prevention. However, its improvement focuses on the physical structure of the electrodes themselves and does not consider the impact of environmental humidity changes on discharge characteristics. When this module is applied to actual air conditioning scenarios, humidity fluctuations still lead to unstable discharge, decreased dust removal efficiency, and the risk of ozone generation is not effectively suppressed.

[0005] On the other hand, patent CN117446145A discloses a low-noise multi-functional air conditioner. It uses an aluminum alloy casing to house a purification module and a filter module for air filtration and VOC removal, and includes a water regulating valve and an electric heater for temperature and humidity control. While this solution enhances the overall purification capacity of the air conditioner through multi-module integration, the purification module becomes saturated with VOCs after long-term operation, making continuous VOC removal difficult. Similarly, the dust removal module struggles to maintain its effectiveness after reaching a certain adsorption level, leading to decreased purification performance, frequent filter replacements, and high maintenance costs.

[0006] In summary, existing technologies have not yet provided an electrostatic dust removal solution that can maintain high efficiency and low ozone emissions over a long period of time in complex humidity environments. There is an urgent need for an air conditioning filter that can adaptively adjust humidity, stabilize electrostatic dust removal performance, and effectively suppress ozone generation. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electrothermal automatic regeneration activated carbon air conditioner filter, which solves the technical problem that "existing air conditioner filters cannot maintain a high-efficiency, low-ozone electrostatic dust removal effect for a long time in complex humidity environments".

[0008] To achieve the above objectives, the present invention is implemented using the following technical solution: This invention provides an electrothermal automatic regeneration activated carbon air conditioner filter. The filter housing is sized to match the air conditioner's return air vent. The internal modules include: a humidity adaptive adjustment module near the air inlet, an electrostatic dust removal module, a self-regenerating adsorption module, and a filter screen near the air outlet. Each module is installed inside the housing via detachable metal rails and plastic clips. Each module is fixed by the metal rails and plastic clips and can be individually disassembled and replaced or washed, dried, and reinstalled. A polyurethane foam insulation layer is filled between the housing and the internal modules to prevent heat transfer to the air conditioner housing and filter housing during regeneration, thus preventing burns. The temperature and humidity sensor is equipped with over-temperature power-off protection, and the heating rod and PI heating film are equipped with flame-retardant encapsulation.

[0009] In this invention, the humidity adaptive adjustment module includes a temperature and humidity sensor, a fan, a heating rod, a water collection plate, and a desiccant container. The desiccant container is filled with silica gel desiccant. When the temperature and humidity sensor detects that the inlet air humidity is greater than 75%, the silica gel desiccant begins to absorb moisture. After it becomes saturated, the fan and heating rod start to heat and dehumidify the silica gel desiccant. The high-temperature and high-humidity gas is discharged after condensation through the water collection plate. When the humidity is less than 45%, water is added to the water collection plate, and the fan blows air in the opposite direction to humidify. When the humidity is in the range of 45%-75%, the airflow directly enters the electrostatic dust removal module through the guide plate.

[0010] The electrostatic dust removal module includes an airflow homogenizing plate, an electrostatic generating unit for charging particulate matter, and an electrostatic dust collection structure for collecting charged particles. The electrostatic generating unit has discharge needles made of titanium alloy arranged at intervals perpendicular to the airflow direction, which can quickly charge fine particles. The electrostatic dust collection structure is a honeycomb electrode plate made of titanium alloy, on which multiple honeycomb channels are formed to run through the airflow direction, allowing charged particles to be adsorbed onto the inner wall of the electrode plate. It can be easily removed by disassembly. The airflow homogenizing plate is located between the electrostatic generating unit and the electrostatic dust collection structure. It has multiple flow equalization holes to ensure that the airflow entering the electrostatic generating unit is evenly distributed, ensuring that the airflow velocity at each discharge needle is consistent with the particle concentration. This avoids insufficient charging due to excessively fast local airflow or excessive particle deposition due to excessively slow local airflow, thereby improving the overall charging efficiency and dust collection uniformity.

[0011] In this invention, the self-regenerating adsorption module includes honeycomb activated carbon supported on MnO2 catalyst, a PI heating film, an airflow sensor, and a temperature sensor; the honeycomb activated carbon has a pore size of 3-5 mm and a specific surface area of ​​800-1000 m². 2 / g, used to capture odor gases; MnO2 catalyst can synergistically decompose organic matter adsorbed in honeycomb activated carbon; the PI heating film has a thickness of 0.1-0.2mm and a surface heating power of 100-150W / m. 2 It is sandwiched between honeycomb activated carbon and used to heat the activated carbon to desorb the adsorbed organic matter.

[0012] The temperature and airflow signals of the self-regenerating adsorption module can be fed back to the control module in real time through sensors. When the control module determines that the activated carbon adsorption is saturated based on the airflow sensor, it automatically starts the regeneration program and cuts off the power supply to the electrostatic generator unit to avoid interference. The control module controls the on / off state of the PI heating film based on the feedback signal from the temperature sensor to maintain the regeneration temperature within the set range.

[0013] The control module is integrated next to the humidity adaptive adjustment module. It is used to receive signals from various sensors and monitor PM2.5 concentration, TVOC concentration, air volume, temperature, and humidity in real time. It automatically switches between humidification, dehumidification, and direct-flow modes according to humidity, and adjusts the electrostatic voltage according to dust concentration. It links with the air conditioner for ventilation and automatically restores the purification mode after regeneration, turning the power supply of the heating rod and PI heating film on and off. It suspends the operation of the electrostatic module when the ozone concentration exceeds the standard.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) The present invention uses a humidity adaptive adjustment module to stably control the air humidity before entering the electrostatic dust removal module within the optimal range of 45-75%, which solves the problem of decreased electrostatic dust removal efficiency and increased risk of ozone generation caused by environmental humidity fluctuations, and improves the stable purification performance of the filter under different climate conditions and different air conditioning operation modes.

[0015] (2) The present invention adopts a self-regenerating adsorption module with integrated design of physical adsorption, chemical catalysis and electrothermal regeneration. It achieves dual purification of adsorption and catalysis through honeycomb activated carbon loaded with MnO2 catalyst. The adsorption performance is precisely regenerated by using PI heating film sandwiched in the middle of activated carbon. It does not require frequent replacement, reduces maintenance costs and improves service life.

[0016] (3) The present invention adopts a modular design. Each functional module is installed in the shell through a detachable structure. It can be disassembled and washed separately, making maintenance convenient. The shell and the internal modules are filled with a polyurethane foam insulation layer. Combined with over-temperature power-off protection and flame-retardant encapsulation, it effectively prevents heat transfer burns and fire risks. The control module integrates multi-sensor collaborative control to realize functions such as humidity regulation, dynamic adaptation of electrostatic voltage, intelligent triggering of regeneration timing, and air conditioning linkage ventilation. It has a high degree of safety and intelligence. Attached Figure Description

[0017] Figure 1 This is an assembly drawing of the air conditioner filter of the present invention.

[0018] Figure 2 This is a planar sectional view of the air conditioner filter of the present invention.

[0019] Figure 3 This is a schematic diagram of the humidity adaptive adjustment module for the air conditioner filter of the present invention.

[0020] Figure 4 This is a schematic diagram of the electrostatic dust removal module for the air conditioner filter of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the self-regenerating adsorption module of the air conditioner filter of the present invention.

[0022] Reference numerals: 1. Humidity adaptive adjustment module; 11. Temperature and humidity sensor; 12. Fan; 13. Heating rod; 14. Water collection plate; 15. Desiccant container; 2. Guide plate; 3. Electrostatic dust removal module; 31. Airflow homogenization plate; 32. Electrostatic generation unit; 321. Discharge needle; 33. Electrostatic dust collection structure; 4. Self-regenerating adsorption module; 41. Honeycomb activated carbon; 42. PI heating film; 43. Air volume sensor; 44. Temperature sensor; 5. Filter screen; 6. Control module; 7. Air inlet; 8. Air outlet; 9. Drain / water inlet. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1; Reference Figures 1-5 This embodiment discloses an electrically heated automatic regeneration activated carbon air conditioner filter, such as... Figure 1 and Figure 2As shown, the air conditioner filter includes a housing and internal modules. The internal modules include: a humidity adaptive adjustment module 1 located at one end near the air inlet 7; a humidity adaptive adjustment module 1 on one side of the guide plate 2 and an electrostatic dust removal module 3 on the other side; a self-regenerating adsorption module 4 located below the electrostatic dust removal module 3; and a filter screen 5 located at one end near the air outlet 8. Each module is installed inside the housing via detachable metal slide rails and plastic clips.

[0025] like Figure 3 As shown, in this embodiment, the humidity adaptive adjustment module 1 includes a temperature and humidity sensor 11, a fan 12, a heating rod 13, a water collection plate 14, and a desiccant container 15. The temperature and humidity sensor 11 collects the intake air humidity in real time. When the humidity is greater than 75%, the silica gel desiccant filled inside the desiccant container 15 actively absorbs moisture. After the desiccant is saturated with moisture, the dehumidification program is started. The control module 6 starts the fan 12 and the heating rod 13. The high-temperature and high-humidity gas comes into contact with the low-temperature water collection plate and condenses. The condensate flows into the air conditioner condensate drain pipe through the slope of the water collection plate 14. When the humidity is less than 45%, the user injects water through the outlet of the water collection plate 14, and the fan 12 blows air in the opposite direction to blow water vapor into the intake airflow to achieve humidification. When the humidity is 45-75%, the airflow is directly guided to the top through the guide plate and flows downward into the electrostatic dust removal module 3.

[0026] like Figure 4 As shown, in this embodiment, the electrostatic dust removal module 3 includes an airflow homogenization plate 31, an electrostatic generation unit 32, and an electrostatic dust collection structure 33. The electrostatic generation unit 32 is provided with titanium alloy discharge needles 321 arranged at intervals perpendicular to the airflow direction. The discharge needles 321 are subjected to a voltage of 6-8kV according to the dust concentration to generate weak plasma, which rapidly charges the fine particles. The electrostatic dust collection structure 33 is a honeycomb electrode plate made of titanium alloy, on which multiple honeycomb channels are formed to run through the airflow direction. A uniform electric field is formed by applying a low voltage of 3-5kV, so that... Charged particles are adsorbed onto the inner wall of the electrode plate, and the bacterial cell wall is broken down by the electric field to achieve sterilization. It can be disassembled and washed directly with water, dried and reinstalled for convenient dust removal. The airflow equalization plate 31 is located between the electrostatic generating unit 32 and the electrostatic dust collection structure 33. It has multiple flow equalization holes to make the airflow entering the electrostatic generating unit 32 evenly distributed, ensuring that the airflow velocity at each discharge needle 321 is consistent with the particle concentration, avoiding insufficient charging due to excessive local airflow or excessive particle deposition due to excessive local airflow, thereby improving the overall charging efficiency and dust collection uniformity.

[0027] like Figure 5As shown, in this embodiment, the self-regenerating adsorption module 4 is provided with honeycomb activated carbon 41 loaded with MnO2 catalyst, which is used to capture TVOC, formaldehyde and odor gases. PI heating film 42 is sandwiched in the middle of honeycomb activated carbon 41, which is used to heat the activated carbon to desorb the adsorbed organic matter. The air conditioner is linked to ventilate and discharge the desorbed pollutants, thus realizing regenerative adsorption.

[0028] The honeycomb activated carbon 41 has a pore size of 3-5 mm and a specific surface area of ​​800-1000 m². 2 With an initial iodine adsorption value of 1000 mg / g, the honeycomb structure increases the airflow contact area while reducing wind resistance, enabling efficient capture of TVOC, formaldehyde, and odorous gases. The supported MnO2 catalyst synergistically decomposes adsorbed formaldehyde and other organic compounds, achieving dual purification through adsorption and catalysis, and extending the adsorption saturation period. The PI heating film 42 has a thickness of 0.1-0.2 mm and a surface heating power of 100-150 W / m². 2 The activated carbon module is sandwiched in the middle of the honeycomb activated carbon 41 to ensure uniform heating and avoid local overheating. When the control module 6 determines that the activated carbon is saturated based on the air volume sensor 43, it automatically starts the regeneration program, cuts off the power supply to the electrostatic generator 32 to avoid interference, and controls the PI heating film 42 to heat the honeycomb activated carbon 41, so that the adsorbed organic matter is efficiently desorbed. At the same time, the air conditioner is switched to ventilation mode through the infrared communication protocol to discharge the desorbed pollutants outdoors. According to the test, the single regeneration time is 60 minutes, the energy consumption is ≤50W, and the iodine adsorption value recovery rate after regeneration is ≥85%, realizing the long-term operation of the activated carbon module without replacement.

[0029] Each module is fixed by metal slide rails and plastic clips, and can be disassembled and replaced individually or washed with water. After drying, it can be reinstalled. The space between the outer shell and the internal modules is filled with a polyurethane foam insulation layer to prevent heat from being transferred to the air conditioner shell and filter shell during regeneration, thus preventing burns. The temperature and humidity sensor 11 is equipped with over-temperature power-off protection, and the heating rod 13 and PI heating film 42 are equipped with flame-retardant encapsulation.

[0030] In this embodiment, the control module 6 is integrated next to the humidity adaptive adjustment module 1. It is used to receive signals from various sensors and monitor PM2.5 concentration, TVOC concentration, air volume, temperature, and humidity in real time; automatically switch between humidification, dehumidification, and direct-flow modes according to humidity; adjust the electrostatic voltage according to dust concentration; link with the air conditioner for ventilation; automatically restore the purification mode after regeneration and turn on / off the power supply of the heating rod 13 and PI heating film 42; and suspend the operation of the electrostatic module when the ozone concentration exceeds the standard.

[0031] Working principle: After air enters through the air inlet 7, the humidity is detected in real time by the temperature and humidity sensor 11 and fed back to the control module 6. When the humidity is higher than 75%, heating and dehumidification are activated, and the condensate is discharged through the drain / inlet 9. When the humidity is lower than 45%, water is injected into the water outlet of the water collection plate 14 through the drain / inlet 9, and humidification is achieved by the reverse blowing of the fan 12. When the humidity is in the range of 45-75%, it is directly guided by the guide plate 2, so that the humidity of the air entering the electrostatic dust removal module 3 is always kept within the optimal range. Then the airflow is evenly distributed by the airflow equalization plate 31, and the static electricity generation unit 32 dynamically adjusts the airflow according to the dust concentration. A 6-8kV voltage is applied to efficiently charge particulate matter, which then enters the electrostatic dust collection structure 33 and is adsorbed and captured in a 3-5kV low-voltage electric field, achieving low-ozone and high-efficiency dust removal. The purified air flows through honeycomb activated carbon 41 loaded with MnO2 catalyst, where gaseous pollutants are removed through a combination of physical adsorption and chemical catalysis. During operation, when the air volume drops to 80% of the initial value or the TVOC concentration exceeds the threshold, the control module 6 activates the PI heating film 42 to heat the honeycomb activated carbon 41 to restore its adsorption capacity, and links the air conditioning ventilation mode to discharge the desorbed pollutants outdoors, thereby regenerating the adsorption capacity. After completion, the purification operation is automatically restored.

[0032] Example 2; This embodiment is an optimized and improved version of embodiment 1, as detailed below: Unlike Embodiment 1, the electrostatic dust collection structure 33 in the electrostatic dust removal module 3 of this embodiment adopts a multi-layer drawer-type pull-out structure. It has an external metal frame, and the two sides of the frame have guide grooves that cooperate with the slide rail of the outer shell. The electrostatic dust collection structure 33 can be pulled out from the side of the outer shell along the vertical direction of airflow. The electrostatic dust collection structure 33 is composed of 3-5 layers of honeycomb-shaped electrode plates stacked inside. An insulating positioning grid is provided between adjacent electrode plates to ensure that the distance between the electrode plates is constant at 8-12mm. The discharge needle 321 of the electrostatic generating unit 32 is connected to the electrostatic dust collection structure 33 by a plug-in electrode contact. When the electrostatic dust collection structure 33 is pushed into the outer shell, the elastic contact on its back is automatically connected to the fixed electrode on the inner wall of the outer shell. When it is pulled out, the power is automatically cut off, realizing the disassembly and assembly without wiring.

[0033] In this embodiment, the desiccant container 15 of the humidity adaptive adjustment module 1 is configured as a rotary reversing structure, including a first desiccant box and a second desiccant box, which are arranged symmetrically and connected to a micro motor through a central rotating shaft. When the first desiccant box is saturated with moisture, the control module 6 drives the micro motor to rotate the rotating shaft 180°, so that the first desiccant box switches to the dehumidification station and the second desiccant box enters the moisture absorption station, realizing the parallel operation of moisture absorption and dehumidification without interrupting the airflow. The dehumidification station is equipped with a fan 12 and a heating rod 13 to heat and dehumidify the saturated desiccant. After the dehumidified desiccant is cooled, it waits for the next switching cycle.

[0034] The water collection plate 14 is designed with a double slope structure, which is high in the middle and low on both sides. The condensate flows from the middle to both sides and is discharged through two drain / inlet ports 9 respectively, avoiding water accumulation caused by poor drainage on one side.

[0035] In this embodiment, the connection between the modules adopts a quick-release modular frame structure, that is, multiple independent module mounting cavities are set inside the shell along the airflow direction, and adjacent modules are isolated by elastic sealing rings to ensure that there is no bypass leakage of airflow; the bottom of each module mounting cavity is equipped with a spring-type ejection mechanism. When the buckle at the front end of the module is unlocked, the spring ejection mechanism automatically pushes the module outward by 5-8mm, making it easy for the user to grab and take it out; the entrance of the mounting cavity is equipped with a foolproof guide groove to ensure that each module is installed in the correct direction.

[0036] In this embodiment, the guide vane 2 adopts an adjustable blade structure, including multiple sets of parallel guide vanes. The angle of each set of vanes can be adjusted independently. The control module automatically adjusts the blade angle according to the feedback signal from the air volume sensor 43, so that the airflow is evenly distributed at the inlet section of the electrostatic dust removal module, avoiding excessively high local wind speeds that would reduce dust removal efficiency.

[0037] The working principle of this embodiment is basically the same as that of Embodiment 1, with the following differences: the electrostatic dust collection structure adopts a drawer-type pull-out design, which allows users to remove and wash it without tools; the plug-in electrode contacts enable automatic power on and off; the activated carbon and heating film adopt a sandwich composite laminate structure, which improves heat transfer efficiency and further reduces regeneration energy consumption; the desiccant container adopts a rotary reversing structure, which enables simultaneous moisture absorption and dehumidification, and the humidity adjustment module can work continuously without interruption; the double-slope water collection plate 14 improves drainage reliability; each module is more convenient to maintain and operate through a quick-release frame and spring ejection mechanism; the adjustable guide plate achieves uniform airflow distribution and improves electrostatic dust removal efficiency.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. An electrically heated, automatically regenerating activated carbon air conditioner filter, characterized in that, The filter is provided with an outer shell and an internal module. The size of the outer shell matches the air conditioner return air vent. The internal module includes: a humidity adaptive adjustment module (1) near the air inlet (7), an electrostatic dust removal module (3), a self-regenerating adsorption module (4), and a filter screen (5) near the air outlet (8). Each module is installed in the outer shell by a detachable metal slide rail and a plastic buckle. The electrostatic dust removal module (3) includes an airflow equalization plate (31), an electrostatic generation unit (32) for charging particulate matter, and an electrostatic dust collection structure (33) for collecting charged particles. The self-regenerating adsorption module (4) is equipped with honeycomb activated carbon (41) for capturing odor gases, and is loaded with MnO2 catalyst for synergistic decomposition of adsorbed organic matter; a PI heating film (42) is sandwiched in the middle of the honeycomb activated carbon (41) for heating the activated carbon and desorbing the adsorbed organic matter. The self-regenerating adsorption module (4) is also equipped with an airflow sensor (43) and a temperature sensor (44), and the feedback signals of the two are transmitted to the control module (6) in real time. When the control module (6) determines that the activated carbon adsorption is saturated according to the airflow sensor (43), it automatically starts the regeneration program and cuts off the power supply of the electrostatic generator unit (32) at the same time to avoid interference. The control module (6) also controls the on / off of the PI heating film (42) according to the feedback signal of the temperature sensor (44) so ​​that the regeneration temperature is maintained within the set range.

2. The filter according to claim 1, characterized in that, The humidity adaptive adjustment module (1) includes a temperature and humidity sensor (11), a fan (12), a heating rod (13), a water collection plate (14), and a desiccant container (15).

3. The filter according to claim 2, characterized in that, The desiccant container (15) is filled with silica gel desiccant. When the temperature and humidity sensor (11) detects that the inlet air humidity is greater than 75%, the silica gel desiccant absorbs moisture. After the moisture absorption is saturated, the fan (12) and the heating rod (13) heat the silica gel desiccant to dehumidify it. The high temperature and high humidity gas is discharged after condensation through the water collection plate (14). When the humidity is less than 45%, the water collection plate (14) is filled with water, and the fan (12) blows air in the opposite direction to humidify. When the humidity is in the range of 45-75%, the airflow directly enters the electrostatic dust removal module (3) through the guide plate (2).

4. The filter according to claim 1, characterized in that, The airflow homogenizing plate (31) has multiple flow equalization holes.

5. The filter according to claim 1, characterized in that, The electrostatic generating unit (32) is provided with multiple discharge needles (321) made of titanium alloy arranged at intervals perpendicular to the airflow direction.

6. The filter according to claim 1, characterized in that, The electrostatic dust collection structure (33) is a honeycomb plate made of titanium alloy, on which multiple honeycomb channels are formed along the airflow direction.

7. The filter according to claim 1, characterized in that, The control module (6) is integrated next to the humidity adaptive adjustment module (1) and is used to receive signals from various sensors and monitor PM2.5 concentration, TVOC concentration, air volume, temperature and humidity in real time; automatically switch between humidification, dehumidification and direct-flow modes according to humidity, adjust the electrostatic voltage according to dust concentration; link the air conditioner for ventilation, automatically restore the purification mode after regeneration, control the power on / off of the heating rod (13) and PI heating film (42); and suspend the operation of the electrostatic module when the ozone concentration exceeds the standard.

8. The filter according to claim 1, characterized in that, The PI heating film (42) has a thickness of 0.1-0.2 mm and a surface heating power of 100-150 W / m. 2 .

9. The filter according to claim 1, characterized in that, The honeycomb activated carbon (41) has a pore size of 3-5 mm and a specific surface area of ​​800-1000 m². 2 / g.

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