Efficient air filtering device

Abstract

The invention relates to the technical field of air filters, in particular to an efficient air filtering device which comprises a shell, a cover plate and a motor which are connected and further comprises an adjusting assembly, an electric heating wire and a negative pressure assembly, the adjusting assembly is arranged in the shell and comprises a rotating roller, and the rotating roller is fixedly connected with the output end of the motor; a processing groove, a waiting groove and a working groove are formed in one end of the rotating roller in a surrounding mode, filter elements are arranged in the processing groove, the waiting groove and the working groove, a heating groove is formed in the axis of the rotating roller, and the electric heating wire is arranged in the heating groove and connected with the cover plate; and the negative pressure assembly is arranged on the shell and is communicated with the treatment tank and the working tank. Through the arrangement of the adjusting assembly, the electric heating wire and the negative pressure assembly, on the basis that formaldehyde desorption is prevented from affecting the indoor environment again, repeated use of the filter element is achieved.

Description

Technical Field

[0001] This invention relates to the field of air filter technology, specifically to a high-efficiency air filtration device. Background Technology

[0002] Formaldehyde is a colorless, easily soluble, and irritating gas that can be absorbed through the respiratory tract. It can damage the body by increasing reactive oxygen species in tissues, causing lipid peroxidation, and affecting the body's immune system, leading to serious diseases such as bronchial asthma, nasal cancer, and leukemia. Therefore, the indoor air environment needs to be strictly controlled.

[0003] Before moving into a newly renovated house, consumers often use household indoor air purifiers with HEPA filters to treat the indoor air environment. These effectively remove floating dust and bacteria, but they are ineffective at removing formaldehyde. While existing technologies offer solutions to this problem, such as the multi-layer composite filter for HEPA filters (publication number CN104984600B), which replaces the single HEPA filter with a multi-layer composite filter containing a pre-filter layer. This not only removes regular particulate matter but also efficiently removes formaldehyde and extends the lifespan of the HEPA filter. However, the following drawbacks remain: the pre-filter layer only delays the eventual clogging of the main HEPA filter; it does not eliminate its physical wear and tear. Furthermore, as adsorption time increases, when the activated carbon reaches adsorption saturation, previously adsorbed formaldehyde and other harmful gases are desorbed and released back into the purified air, still affecting the indoor environment.

[0004] Therefore, in order to solve the above problems, a highly efficient air filtration device is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a highly efficient air filtration device that solves the problem of HEPA filter clogging and formaldehyde desorption affecting the indoor environment as adsorption time increases. Through the design of adjustment components, electric heating wires, and negative pressure components, the device can purify the indoor air while simultaneously removing formaldehyde, thus preventing formaldehyde desorption from re-affecting the indoor environment and enabling the reuse of the filter.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A high-efficiency air filtration device includes a housing, a cover plate, and a motor connected together. The cover plate and the motor are respectively disposed at the open end and the closed end of the housing. It also includes an adjustment component, an electric heating wire, and a negative pressure component. The adjustment component is disposed inside the housing and includes a rotating roller. The rotating roller is fixedly connected to the output end of the motor. One end of the rotating roller has a processing groove, a waiting groove, and a working groove circumferentially formed. Filter elements are disposed inside the processing groove, the waiting groove, and the working groove. A heating groove is formed along the axis of the rotating roller. The electric heating wire is disposed inside the heating groove and connected to the cover plate. The negative pressure component is disposed on the housing and communicates with the processing groove and the working groove. When the motor is energized, it drives the rotating roller to rotate, thereby adjusting the positions of the processing groove, the waiting groove, and the working groove. When the negative pressure component is working, it draws in unpurified air through the working groove and creates a negative pressure inside the processing groove. When the negative pressure is formed inside the processing groove, it draws in outdoor air and heats the filter elements in the processing groove through the electric heating wire.

[0007] Preferably, the adjusting assembly further includes a baffle, a sealing gasket, a limiting rod, a stop block, and a spring. The heating tank sidewall has three guide holes arranged in a circumferential array, each of which is connected to the processing tank, the waiting tank, and the working tank, respectively. The baffle is disposed inside the heating tank. The sealing gasket is disposed on the baffle and matches the inner wall of the heating tank. Two limiting rods are provided and symmetrically pass through the baffle and are movably sleeved on the baffle. One end of the limiting rod is connected to the inner wall of the heating tank. The stop block is disposed at the other end of the limiting rod. The spring is sleeved on the limiting rod and its two ends are connected to the baffle and the stop block, respectively. The weight of the baffle is greater than the sum of the elastic forces of the two springs.

[0008] As the filter cartridge continues to work, the number of impurity particles accumulating on the air inlet surface gradually increases, affecting the formaldehyde removal and purification effect. Although replacing the filter cartridge can ensure the normal operation of the filtration device, the replacement time is uncertain, and the replaced cartridge cannot be reused. Therefore, this solution is adopted. Using a rotating roller with a processing tank, waiting tank, and working tank inside, along with corresponding filter cartridges, the filter cartridges in the processing tank can be heated for formaldehyde removal while the cartridges in the working tank are undergoing formaldehyde removal and purification. On one hand, while ensuring the purification effect of the cartridges in the working tank, the cartridges in the heating tank can be recycled and reused. On the other hand, a motor can be used to drive the rotating roller at regular intervals (the timing of the motor drive and the angle of each rotation can be controlled by a PLC controller; this is a conventional technique and will not be elaborated further). Simultaneously, the working tank rotates from the waiting tank to the working tank, achieving timed replacement of the filter cartridges and effectively ensuring their formaldehyde removal and purification effect.

[0009] Preferably, the bottom of the processing tank, the waiting tank, and the working tank are all provided with a second spring, and the other end of the second spring is in contact with the end of the corresponding filter element.

[0010] By adopting the above solution, the elastic force of spring two can be used to squeeze the end of the filter element, so that the other end of the filter element is stably attached to the cover plate, thereby ensuring the sealing of the contact surface between the filter element and the cover plate and avoiding air leakage. At the same time, when the three filter elements need to be replaced after a long period of use, the elastic force of spring two can be used to pop the three filter elements out of the processing tank, waiting tank and working tank respectively, so as to facilitate the replacement of the three filter elements.

[0011] Preferably, the negative pressure assembly includes an air outlet pipe, an air inlet pipe, and a branch pipe. The air outlet pipe is located at the closed end of the housing and communicates with the interior of the housing. An air inlet is provided on the cover plate. The air inlet is coaxially arranged with the working tank and the air outlet pipe. Through holes are provided at the bottom of the processing tank, the waiting tank, and the working tank. A one-way valve communicating with the heating tank is provided through the cover plate. The air inlet pipe is connected to the one-way valve. The two ends of the branch pipe are respectively connected to the cover plate and the air outlet pipe.

[0012] It is known that to allow unpurified indoor air to pass through the filter element for filtration, a blower or negative pressure fan is usually installed at one end of the filter element to ensure that air can pass through the filter element normally. Considering that using a blower would cause the blower to be affected by dust particles in the air, a negative pressure fan is usually chosen. However, whether it is a blower or a negative pressure fan, there is usually only one airflow channel. During the formaldehyde removal and purification process of the filter element in the working tank, there is no airflow in the treatment tank. Although a negative pressure fan can be installed at the end of the treatment tank, it will increase the manufacturing and operating costs of the entire device. Therefore, this solution is adopted. By using an exhaust duct (a negative pressure fan can be installed on the exhaust duct; when the negative pressure fan is working, airflow enters the working tank through the air inlet on the cover plate. The filter element in the working tank removes formaldehyde from the drawn air and then discharges it to the outside through the exhaust duct. This is a conventional technical solution, so the negative pressure fan is not shown in the attached diagram and will not be described in detail), an inlet duct, and branch pipes, a negative pressure can be formed inside the treatment tank during the airflow discharge process. This allows the formaldehyde desorbed by the filter element in the treatment tank to be discharged after heating. This ensures that the filter element can be reused while preventing the desorbed formaldehyde from being released back into the room, effectively protecting the indoor air environment.

[0013] Preferably, the inner walls of the processing tank, the waiting tank, and the working tank are all provided with spiral grooves.

[0014] By adopting the above scheme, after the purified outdoor air enters the heating tank through the air inlet pipe and one-way valve, it will drive the heat generated by the electric heating wire in the heating tank to enter the interior of the treatment tank through the guide hole. The hot airflow entering the treatment tank will rotate and heat the corresponding filter element surface under the action of the spiral groove, expanding the heating range and improving the formaldehyde desorption effect in the filter element, so that the filter element can be reused.

[0015] Preferably, the air outlet pipe includes pipe one, pipe two, and pipe three connected sequentially from left to right. Pipe one is connected to the housing. The inner diameter of pipe three is smaller than the inner diameter of pipe one. The inner diameter of the left end of pipe two is equal to the inner diameter of pipe one. The inner diameter of the right end of pipe two is equal to the inner diameter of pipe three. The left end of the branch pipe passes through the cover plate and is connected to the treatment tank. The right end of the branch pipe passes through the interior of pipe two.

[0016] By adopting the above scheme, the flow velocity of the airflow from pipe 1 to pipe 3 is increased under the action of Bernoulli's principle by utilizing the changes in the inner diameter of pipe 1, pipe 2, and pipe 3. This reduces the static pressure inside pipe 2 and pipe 3, increases the pressure difference between the branch pipe and pipe 2, and allows the airflow in the treatment tank to be adsorbed into the interior of pipe 2 and discharged. This removes the formaldehyde desorbed by the filter element in the treatment tank to ensure the indoor air environment. At the same time, the negative pressure fan can also be installed on pipe 1 to prevent the dust discharged from the treatment tank through the branch pipe from affecting the negative pressure fan.

[0017] Preferably, both ends of the branch pipe are rigid conduits and the middle part is a rubber conduit, and the inner diameter of the branch pipe is smaller than the inner diameter of the tube three.

[0018] By adopting the above scheme, the middle part of the branch pipe is set as a rubber conduit, which facilitates the disassembly and assembly of the cover plate. At the same time, by utilizing the difference in inner diameter between the branch pipe and the third pipe, a negative pressure state can be formed inside the treatment tank without the need for an external power source under the action of Bernoulli's principle, so that the formaldehyde desorbed from the filter element in the treatment tank can be automatically discharged.

[0019] Preferably, the cross-sectional area of ​​the spiral groove is smaller than the radial cross-sectional area of ​​the air inlet pipe, and each filter element is offset from the corresponding guide hole.

[0020] By adopting the above scheme, part of the airflow entering the treatment tank will rotate around the filter element through the spiral groove, while another part will enter the filter element from the right end. This expands the heating area of ​​the filter element and removes the dust particles clogging the left end of the filter element, thereby improving the cleaning effect of the filter element and ensuring that the filter element can be reused.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. A rotating roller system with a treatment tank, a waiting tank, and a working tank creates a "working-waiting-regeneration" cyclic filtration mechanism for the filter cartridges. Driven by a motor, the rollers periodically rotate saturated filter cartridges to the treatment tank for heating and desorption, while simultaneously putting spare filter cartridges into operation. This not only ensures continuous indoor air purification but also fundamentally blocks the path of formaldehyde re-release into the indoor environment due to adsorption saturation through immediate regeneration of saturated filter cartridges, effectively preventing secondary pollution and significantly extending the lifespan of the filter cartridges.

[0022] 2. Through the setting of baffles, spring one, sealing gaskets, and negative pressure components, the baffles' own weight and the balance relationship of spring one are utilized. Only when the filter element rotates to the upper treatment tank position will the corresponding guide hole automatically open to guide heat into the treatment tank, while the guide hole in the working or waiting position remains closed. At the same time, based on Bernoulli's principle, without the need for an additional power source, the formaldehyde and exhaust gas after high-temperature desorption are forcibly discharged outdoors, ensuring that pollutants during the regeneration process do not leak into the shell or indoors, further guaranteeing the indoor air environment.

[0023] 3. Through the designed spiral grooves, when outside air enters the treatment tank through the heating tank under negative pressure, the spiral grooves guide the hot airflow to form a rotating vortex around the filter element. On the one hand, this greatly increases the contact area and contact time between the hot airflow and the filter element, making formaldehyde desorption more thorough; on the other hand, the high-speed rotating airflow can exert a strong scouring and peeling effect on the dust particles accumulated on the air inlet end face of the filter element. This allows the device to effectively remove physical pollutants while removing formaldehyde through thermal desorption, thereby fully restoring the air permeability and filtration efficiency of the filter element. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is an exploded view of the rotating roller, three filter elements, and corresponding spring 2 of the present invention; Figure 4 For the present invention Figure 3 A magnified view of part B in the middle section; Figure 5 This is a partial cross-sectional view of the connection structure between the housing, the rotating roller, and the negative pressure assembly of the present invention; Figure 6 For the present invention Figure 2 A magnified view of part A in the middle.

[0025] In the diagram: 1. Shell; 2. Cover plate; 21. Air inlet; 22. One-way valve; 3. Motor; 4. Adjustment assembly; 41. Rotary roller; 411. Processing tank; 412. Waiting tank; 413. Working tank; 414. Filter element; 415. Heating tank; 416. Guide hole; 417. Spring 2; 418. Through hole; 419. Spiral groove; 42. Baffle; 43. Sealing gasket; 44. Limiting rod; 45. Stop block; 46. Spring 1; 5. Electric heating wire; 6. Negative pressure assembly; 61. Air outlet pipe; 611. Pipe 1; 612. Pipe 2; 613. Pipe 3; 62. Air inlet pipe; 63. Branch pipe. Detailed Implementation

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

[0027] Please see Figures 1 to 6 This invention provides a high-efficiency air filtration device, the technical solution of which is as follows: For details, please refer to Figure 1 , Figure 2 and Figure 3 A high-efficiency air filtration device includes a housing 1, a cover plate 2, and a motor 3 connected together. The cover plate 2 and the motor 3 are respectively located at the open end and the closed end of the housing 1. It also includes an adjustment component 4, an electric heating wire 5, and a negative pressure component 6. The adjustment component 4 is located inside the housing 1 and includes a rotating roller 41. The rotating roller 41 is fixedly connected to the output end of the motor 3. One end of the rotating roller 41 is surrounded by a processing groove 411, a waiting groove 412, and a working groove 413. Filter elements 414 are installed inside the processing groove 411, the waiting groove 412, and the working groove 413. After the filter element 414 in the working groove 413 has been working for a period of time, the rotating roller 41 can be driven by the motor 3 to rotate the waiting groove 412 to the position of the working groove 413, so that a new filter element 414 can be put into the purification work, thereby ensuring the purification effect. A heating groove 415 is opened at the axis of the rotating roller 41. The electric heating wire 5 is located inside the heating groove 415 and connected to the cover plate 2 to fix the electric heating wire 5 and ensure the normal use of the electric heating wire 5. The heat generated by the heating wire during the power-on process can heat the filter element 414 in the treatment tank 411, so that the formaldehyde adsorbed by the filter element 414 is desorbed after heating, so that the filter element 414 can be reused.

[0028] As one embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 4The adjusting assembly 4 also includes a baffle 42, a sealing gasket 43, a limiting rod 44, a stop block 45, and a spring 46. The heating tank 415 has three guide holes 416 arranged in a circumferential array on its side wall. Each guide hole 416 is connected to the processing tank 411, the waiting tank 412, and the working tank 413, respectively. The baffle 42 is disposed inside the heating tank 415. The sealing gasket 43 is disposed on the baffle 42 and matches the inner wall of the heating tank 415. Two limiting rods 44 are provided and symmetrically penetrate the baffle 42 and are connected to the baffle. 42 is movably connected. One end of the limiting rod 44 is connected to the inner wall of the heating tank 415. The stop block 45 is set at the other end of the limiting rod 44. Spring 46 is sleeved on the limiting rod 44 and its two ends are connected to the baffle 42 and the stop block 45 respectively. The weight of the baffle 42 is greater than the sum of the elastic forces of the two springs 46. Spring 417 is set at the bottom of the processing tank 411, the waiting tank 412 and the working tank 413. The other end of the spring 417 contacts the end of the corresponding filter element 414.

[0029] Under the above-mentioned conditions, when it is necessary to replace filter element 414 for formaldehyde removal and purification, motor 3 is started. The output end of motor 3 drives the rotating roller 41 to rotate 120°, rotating filter element 414 in the original waiting tank 412 to the position of the original working tank 413. The baffle 42 below the original treatment tank 411 will rotate to the upper part of the original waiting tank 412. During this process, under its own weight and the elastic force of the two springs 46, the baffle 42 will cause the sealing gasket 43 on its surface to adhere to the inner wall of the heating tank 415, thereby sealing the corresponding guide hole 416. The baffle 42 at the top will overcome the elastic force of the two springs 46 under its own weight and cause the sealing gasket 43 on its surface to separate from the inner wall of the heating tank 415, thereby opening the guide hole 416 at the top. This allows the heat generated after the electric heating wire 5 is energized to heat the corresponding filter element 414 only through the guide hole 416, thereby heating and desorbing the formaldehyde adsorbed in the filter element 414.

[0030] As one embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 5The negative pressure component 6 is mounted on the housing 1 and connected to the processing tank 411 and the working tank 413. The negative pressure component 6 includes an air outlet pipe 61, an air inlet pipe 62, and a branch pipe 63. The air outlet pipe 61 is located at the closed end of the housing 1 and connects to the interior of the housing 1. An air inlet 21 is provided on the cover plate 2. The air inlet 21 is coaxially arranged with the working tank 413 and the air outlet pipe 61. The bottom of the processing tank 411, the waiting tank 412, and the working tank 413 are all provided with through holes 418. A one-way valve 22 is provided through the cover plate 2 and connected to the heating tank 415. The air inlet pipe 62 is connected to the one-way valve 22. The other end of the air inlet pipe 62 is connected to the outdoor air environment. The branch pipe... The two ends of 63 are connected to the cover plate 2 and the air outlet pipe 61 respectively. The air outlet pipe 61 includes pipe 1 611, pipe 2 612 and pipe 3 613 connected from left to right. Pipe 1 611 is connected to the shell 1. The inner diameter of pipe 3 613 is smaller than the inner diameter of pipe 1 611. The inner diameter of the left end of pipe 2 612 is equal to the inner diameter of pipe 1 611. The inner diameter of the right end of pipe 2 612 is equal to the inner diameter of pipe 3 613. The left end of branch pipe 63 passes through the cover plate 2 and is connected to the treatment tank 411. The right end of branch pipe 63 passes through the interior of pipe 2 612. Both ends of branch pipe 63 are rigid conduits and the middle part is a rubber conduit. The inner diameter of branch pipe 63 is smaller than the inner diameter of pipe 3 613.

[0031] Under the above conditions, when a negative pressure is formed inside the air outlet duct 61, under the action of Bernoulli's principle, outdoor air can overcome the pressure of the one-way valve 22 and enter the interior of the heating tank 415 under the action of the air inlet duct 62, and form a hot airflow with the help of the electric heating wire 5. This increases the flow rate of the hot airflow entering the treatment tank 411 through the corresponding guide hole 416 per unit time, effectively removing formaldehyde and dust particles adsorbed by the filter element 414 in the treatment tank 411 without the need for an external power source.

[0032] As one embodiment of the present invention, refer to Figure 3 and Figure 5 The inner walls of the processing tank 411, the waiting tank 412 and the working tank 413 are all provided with spiral grooves 419. The cross-sectional area of ​​the groove opening of the spiral groove 419 is smaller than the radial cross-sectional area of ​​the air inlet pipe 62. Each filter element 414 is offset from the corresponding guide hole 416.

[0033] Under the above-mentioned conditions, the hot airflow entering the treatment tank 411 through the corresponding guide hole 416 can be divided into two streams. One stream of hot airflow can enter the filter element 414 from the right end of the filter element 414 in the treatment tank 411; the other stream of airflow can rotate around the filter element 414 through the spiral groove 419 and enter the filter element 414 from the periphery of the filter element 414. This not only achieves all-round heating and formaldehyde removal of the filter element 414, but also removes the dust particles accumulated on the left end of the filter element 414, thereby ensuring that the filter element 414 can be reused.

[0034] Working principle: When the motor 3 is powered on, it drives the rotating roller 41 to rotate inside the housing 1. In the initial state or after rotation adjustment, the processing groove 411, the waiting groove 412, and the working groove 413 on the rotating roller 41 are in specific positions. The working groove 413 is located at the bottom and connects with the air inlet 21, the processing groove 411 is located at the top, and the waiting groove 412 is located on the side. At this time, the negative pressure component 6 is working (usually connected to an external negative pressure fan). The unpurified indoor air enters the working groove 413 through the air inlet 21 on the cover plate 2 under the negative pressure suction. After the dust and formaldehyde are removed by the filtration and adsorption of the filter element 414 in the working groove 413, the airflow enters the air outlet 61 through the corresponding through hole 418 and is discharged, thus realizing indoor air purification. When the filter element 414 in the working tank 413 reaches adsorption saturation and needs regeneration after working for a certain period of time, the motor 3 drives the rotating roller 41 to rotate 120 degrees, rotating the saturated filter element 414 in the original working tank 413 to the upper processing tank 411. The spare filter element 414 in the original waiting tank 412 rotates to the working tank 413 to continue air purification, while the regenerated filter element 414 in the original processing tank 411 is transferred to the waiting tank 412 for cooling and standby. During this process, the adjusting component 4 inside the heating tank 415 located on the axis of the rotating roller 41 plays a role, using the gravity of the baffle 42 and the elastic force of the spring 46 to counterbalance each other. When the baffle 42 rotates to the upper position with the heating tank 415, the weight of the baffle 42 overcomes the spring 46. The spring force displaces downwards, causing the sealing gasket 43 to separate from the inner wall of the heating tank 415, thereby automatically opening the guide hole 416 leading to the processing tank 411. Meanwhile, the baffle 42 located below or to the side, under the elastic force of the spring 46, tightly adheres to the inner wall of the heating tank 415 to seal the corresponding guide hole 416, ensuring that heat is supplied only to the processing tank 411. At the same time, since the exhaust pipe 61 adopts a variable diameter design of pipe 611, pipe 612, and pipe 613, the main airflow velocity increases and the static pressure decreases when it flows through pipe 612. According to Bernoulli's principle, a negative pressure area is formed inside pipe 612. This negative pressure is transmitted to the processing tank 411 through the branch pipe 63, thereby forcing the outside outdoor air to overcome the resistance of the one-way valve 22 and pass through the inlet. The air duct 62 enters the heating tank 415. At this time, the electric heating wire 5 in the heating tank 415 is energized to generate heat, which heats the incoming air to form a hot airflow. The hot airflow enters the treatment tank 411 through the upper opening guide hole 416. Under the guidance of the spiral groove 419 on the inner wall of the treatment tank 411, part of the hot airflow rotates and flows around the surface of the filter element 414 to wash away and peel off the dust particles accumulated on the end face of the filter element 414. Another part of the hot airflow penetrates the filter element 414 and heats it as a whole, so that the formaldehyde adsorbed in the filter element 414 is desorbed by heat. Finally, the exhaust gas carrying formaldehyde and dust is sucked into the branch pipe 63 and merged into the airflow in the second pipe 612 and discharged to the outside, thus completing the regeneration and cleaning of the filter element 414 without affecting the indoor purification.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency air filtration device, comprising a housing (1), a cover plate (2), and a motor (3) connected together, characterized in that: It also includes an adjustment component (4), an electric heating wire (5), and a negative pressure component (6). The adjustment component (4) is located inside the housing (1) and includes a rotating roller (41). The rotating roller (41) is fixedly connected to the output end of the motor (3). One end of the rotating roller (41) is surrounded by a processing groove (411), a waiting groove (412), and a working groove (413). Filter elements (414) are installed inside the processing groove (411), the waiting groove (412), and the working groove (413). A heating groove (415) is provided at the axis of the rotating roller (41). The electric heating wire (5) is installed inside the heating tank (415) and connected to the cover plate (2). The negative pressure component (6) is installed on the housing (1) and connected to the processing tank (411) and the working tank (413). When the motor (3) is powered on, it drives the rotating roller (41) to rotate. When the negative pressure component (6) is working, it draws in unpurified air through the working tank (413) and forms a negative pressure inside the processing tank (411). When the negative pressure inside the processing tank (411) is formed, it draws in outdoor air and heats the filter element (414) in the processing tank (411) through the electric heating wire (5).

2. The high-efficiency air filtration device according to claim 1, characterized in that: The adjustment assembly (4) further includes a baffle (42), a sealing gasket (43), a limiting rod (44), a stop block (45), and a spring (46). The heating tank (415) has three circumferentially arranged guide holes (416) on its sidewall. Each guide hole (416) is connected to the processing tank (411), the waiting tank (412), and the working tank (413), respectively. The baffle (42) is located inside the heating tank (415), and the sealing gasket (43) is located on the baffle (42) and connected to the heating tank (415). The inner wall of the heating tank (415) is matched. Two limiting rods (44) are provided and symmetrically penetrate the baffle (42) and are movably sleeved with the baffle (42). One end of the limiting rod (44) is connected to the inner wall of the heating tank (415). The stop block (45) is provided at the other end of the limiting rod (44). The spring (46) is sleeved on the limiting rod (44) and its two ends are respectively connected to the baffle (42) and the stop block (45). The weight of the baffle (42) is greater than the sum of the elastic forces of the two springs (46).

3. The high-efficiency air filtration device according to claim 1, characterized in that: The bottom of the processing tank (411), the waiting tank (412) and the working tank (413) are all provided with a second spring (417), and the other end of the second spring (417) is in contact with the end of the corresponding filter element (414).

4. The high-efficiency air filtration device according to claim 1, characterized in that: The negative pressure component (6) includes an air outlet pipe (61), an air inlet pipe (62), and a branch pipe (63). The air outlet pipe (61) is located at the closed end of the housing (1) and communicates with the interior of the housing (1). An air inlet (21) is provided on the cover plate (2). The air inlet (21) is coaxially arranged with the working groove (413) and the air outlet pipe (61). The bottom of the processing groove (411), the waiting groove (412), and the working groove (413) are all provided with through holes (418). A one-way valve (22) communicating with the heating groove (415) is provided through the cover plate (2). The air inlet pipe (62) is connected to the one-way valve (22). The two ends of the branch pipe (63) are connected to the cover plate (2) and the air outlet pipe (61), respectively.

5. The high-efficiency air filtration device according to claim 4, characterized in that: The inner walls of the processing tank (411), waiting tank (412) and working tank (413) are all provided with spiral grooves (419).

6. The high-efficiency air filtration device according to claim 5, characterized in that: The air outlet pipe (61) includes pipe one (611), pipe two (612) and pipe three (613) connected from left to right. Pipe one (611) is connected to the housing (1). The inner diameter of pipe three (613) is smaller than the inner diameter of pipe one (611). The inner diameter of the left end of pipe two (612) is equal to the inner diameter of pipe one (611). The inner diameter of the right end of pipe two (612) is equal to the inner diameter of pipe three (613). The left end of the branch pipe (63) passes through the cover plate (2) and is connected to the treatment tank (411). The right end of the branch pipe (63) passes through the interior of pipe two (612).

7. A high-efficiency air filtration device according to claim 6, characterized in that: Both ends of the branch pipe (63) are rigid conduits and the middle part is a rubber conduit. The inner diameter of the branch pipe (63) is smaller than the inner diameter of the pipe three (613).

8. A high-efficiency air filtration device according to claim 5, characterized in that: The cross-sectional area of ​​the spiral groove (419) is smaller than the radial cross-sectional area of ​​the air inlet pipe (62), and each filter element (414) is offset from the corresponding guide hole (416).

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