Multi-stage efficient air purifier filter element structure

Abstract

The invention discloses a multistage efficient air purifier filter element structure, and relates to the technical field of air purification, the multistage efficient air purifier filter element structure comprises a filter screen assembly, a main shell, a fan and an impurity detection assembly, a middle plate is fixed on the main shell, the impurity detection assembly is arranged on the fan, the other side of the fan is covered with a rear shell, and the rear shell is arranged in the middle plate. The middle plate is provided with an airflow window matched with the fan, the impurity detection assembly comprises a pair of magnetic attraction rings which are rotationally arranged on the middle plate and the rear shell respectively, the magnetic attraction rings cover the periphery of the fan and are made of adsorbable materials, the middle plate and the rear shell are provided with annular grooves matched with the magnetic attraction rings, and the annular grooves are made of adsorbable materials. A first electromagnetic layer is laid at the bottom of the annular groove, friction force detection modules are laid on the two sides of the annular groove, a plurality of connecting frames are connected between the magnetic attraction rings at intervals, and the connecting frames are connected with push plates towards the inner sides. The state of the filter screen assembly can be monitored in real time, and basic cleaning is provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air purification, in particular to a multi-stage high-efficiency air purifier filter core structure. BACKGROUND

[0002] An air purifier is a device used to remove indoor air pollutants, which can effectively improve indoor air quality. The main structure includes a housing: the housing is the external frame of the air purifier, which is used to protect the internal components and provide an attractive appearance. It is usually made of plastic or metal materials, with certain strength and durability. Fan: the fan is one of the core components of the air purifier, which generates airflow by rotating to suck indoor air into the purifier for purification treatment. The performance of the fan directly affects the air volume and purification efficiency of the air purifier. Filter core: the filter core is a key component of the air purifier, which is used to filter pollutants in the air.

[0003] The filter core is usually composed of multiple filter screen structures with different functions. They are used to filter large particles, small particles, harmful gases and odors, etc. According to different filtering needs, different types of filter screens are used. In use, the fan draws in air, which is filtered as it passes through the filter core, and then delivered to the outside.

[0004] In order to avoid the filter core reducing the filtering quality due to adsorbing too many impurities during long-term use, the filter core is usually removed regularly for cleaning. Therefore, it is difficult to judge the efficiency of the filter core during use, and generally it is detected after feeling that the purification effect is not ideal. At the same time, if the filter core is damaged, it will bring a lot of dust to the fan, causing the air volume to decrease, or the fan to be damaged, resulting in a decrease in operating efficiency. SUMMARY

[0005] The purpose of the present application is to provide a multi-stage high-efficiency air purifier filter core structure to solve the problems raised in the background art.

[0006] In order to solve the above technical problems, the present application provides the following technical scheme: a multi-stage high-efficiency air purifier filter core structure, comprising a filter screen assembly, a main shell, a fan and a impurity detection assembly, the main shell is fixed with an intermediate plate, the filter screen assembly is assembled on one side of the intermediate plate, the fan is installed on the other side of the intermediate plate, the impurity detection assembly is arranged on the fan, a rear shell is arranged on the other side of the fan, the intermediate plate is provided with an air flow window matched with the fan, the impurity detection assembly comprises a pair of magnetic attraction rings, which are respectively rotatably arranged on the intermediate plate and the rear shell, the magnetic attraction rings are arranged around the fan, the magnetic attraction rings are made of adsorbable material, the intermediate plate and the rear shell are provided with annular grooves matched with the magnetic attraction rings, an electromagnetic layer one is laid at the bottom of the annular grooves, friction detection modules are laid on both sides of the annular grooves, a plurality of connecting frames are connected between the magnetic attraction rings, the connecting frames are connected with push plates on the inner side, the push plates are obliquely arranged and the inclined surfaces correspond to the positions of the air flow window, the fan is provided with a vortex plate matched with the impurity detection assembly, and the vortex plate is fixed between the intermediate plate and the rear shell.

[0007] According to the above technical scheme, the vortex plate comprises a vortex area and an outlet area, the vortex area is wrapped outside the impurity detection assembly, and the outlet area is connected with the vortex area and has an open upper end communicating with the upper side of the main shell.

[0008] According to the above technical scheme, the filter screen assembly comprises a primary filter screen, a medium filter screen and a high-efficiency filter screen, the primary filter screen is used for intercepting large-particle dust and impurities, the medium filter screen is mainly used for fine particles, and the high-efficiency filter screen is responsible for removing harmful gases and microorganisms such as bacteria, the primary filter screen, the medium filter screen and the high-efficiency filter screen are connected in sequence to ensure the cleanliness of the air outlet.

[0009] According to the above technical scheme, the primary filter screen is made of a thin plate provided with a plurality of grid holes, the size of the grid holes meets the requirement of intercepting large-volume impurities, the medium filter screen is made of a plurality of superimposed HEPA filter screens, fine particles are intercepted by the high-density and small-aperture fiber mesh, and the high-efficiency filter screen is made of an activated carbon filter screen, which can effectively adsorb harmful gases and odors through the high specific surface area and porous structure.

[0010] According to the above technical scheme, at least four dual-purpose grooves are arranged at the edge of the high-efficiency filter screen, an electromagnetic layer two is laid at the bottom of the dual-purpose grooves, an electromagnetic layer three is laid on the side surface of the dual-purpose grooves, a telescopic spring is connected to the bottom of the dual-purpose groove, a telescopic pipe is connected to the side of the medium filter screen corresponding to the dual-purpose groove, the telescopic pipe is provided in a hollow structure and connected to the other end of the telescopic spring inside, and the telescopic pipe and the dual-purpose groove are in sliding connection.

[0011] According to the above technical scheme, a sealing groove is arranged on the side of the high-efficiency filter screen facing the medium filter screen, a sealing block is arranged on the medium filter screen corresponding to the sealing groove, and the depth of the sealing groove is matched with the height of the sealing block.

[0012] According to the above technical scheme, the depth of the sealing groove is greater than the depth of the dual-purpose groove, and the outer surface of the telescopic pipe is made of adsorbable material.

[0013] According to the above technical scheme, the fan comprises a shell, a plurality of standby air flow grooves are arranged on the bottom circumference of the shell, a plurality of rotating rods are arranged in the standby air flow grooves, valve plates are arranged on the rotating rods, and the valve plates are arranged in a structure with a wide middle part and thin ends.

[0014] According to the above technical scheme, a gear one is arranged at one end of the rotating rod, the gear one is connected with a gear ring, the gear ring is arranged in the shell in a rotating mode, a plurality of gear twos are connected with the gear ring in a matched mode, the gear twos are connected with a micro driver, and the shell is provided with a corresponding placement space in a matched mode.

[0015] According to the above technical scheme, a cotton block is connected to the end of the push plate, and the cotton block is closely attached to the surface of the shell.

[0016] According to the above technical scheme, the main shell is connected with a front shell through the filter screen assembly, so as to limit the filter screen assembly from being separated from the main shell.

[0017] Compared with the prior art, the present application has the following beneficial effects: the impurity detection assembly is arranged, the push plate is driven to rotate by the magnetic attraction ring through the air flow, the rotating speed is evaluated by the friction detection module, the air flow state can be monitored in real time and indirectly, the filter screen assembly can be intelligently judged to be normally working in combination with the fan power, the precise diagnosis and early warning of the working state of the filter screen assembly are realized, and the hysteresis and inaccuracy of the traditional judgment by time or air volume decay are avoided.

[0018] When the filtering effect is detected to be reduced, the medium efficiency filter screen can be automatically driven to impact the primary efficiency filter screen through the electromagnetic driving telescopic spring mechanism, vibration force is generated, and large particle impurities attached to the surface of the medium efficiency filter screen can be effectively shaken off. The active cleaning function can temporarily dredge the filter screen without disassembly, delay the clogging speed of the filter screen, prolong the overall service life of the filter screen assembly, and reduce the maintenance frequency. Further, the depth of the telescopic pipe in the dual-purpose groove and the on-off of the electromagnetic layer can be controlled to accurately adjust the impact force, and corresponding cleaning strategies can be adopted for different degrees of clogging, so that the cleaning effect is ensured and damage to the filter screen structure is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings: Figure 1 is a schematic view of the overall structure of the air purifier filter element of the present application; Figure 2 is a schematic view of the structure of the impurity detection assembly of the present application; Figure 3 is a schematic view of the installation position of the fan of the present application; Figure 4 is the schematic diagram of the position relation of the air flow window and the shell of the present application; Figure 5 is the schematic diagram of the local structure of the medium efficiency filter screen and the high efficiency filter screen of the present application; Figure 6 is the schematic diagram of the structure of the shell of the present application; Figure 7 is the sectional view of the standby air flow groove of the present application; Figure 8 is the schematic diagram of the position relation of the gear ring of the present application; Figure 9 is the enlarged schematic diagram of the A area of the present application; Figure 9 Figure 10 is the enlarged schematic diagram of the B area of the present application. Figure 9

[0020] In the figure: 1, main shell; 11, middle plate; 12, rear shell; 13, air flow window; 14, front shell; 2, fan; 21, vortex plate; 211, vortex area; 212, outlet area; 22, shell; 221, standby air flow groove; 23, rotating rod; 231, gear one; 24, valve plate; 25, gear ring; 26, gear two; 27, micro driver; 31, magnetic attraction ring; 32, connecting frame; 33, push plate; 34, cotton block; 41, primary efficiency filter screen; 42, medium efficiency filter screen; 421, telescopic pipe; 422, sealing block; 43, high efficiency filter screen; 431, dual-purpose groove; 432, sealing groove; 44, telescopic spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] Please refer to Figures 1-10 ​​The application provides a technical scheme: a multi-stage high-efficiency air purifier filter core structure, which comprises a filter screen assembly, a main shell 1, a fan 2 and a impurity detection assembly, the main shell 1 is fixed with an intermediate plate 11, the filter screen assembly is assembled on one side of the intermediate plate 11, the fan 2 is installed on the other side of the intermediate plate 11, the impurity detection assembly is arranged on the fan 2, a rear shell 12 is arranged on the other side of the fan 2, the intermediate plate 11 is provided with an air flow window 13 in cooperation with the fan 2, the impurity detection assembly comprises a pair of magnetic attraction rings 31 which are rotatably arranged on the intermediate plate 11 and the rear shell 12 respectively, the magnetic attraction rings 31 are arranged on the periphery of the fan 2, the magnetic attraction rings 31 are made of adsorbable material, the intermediate plate 11 and the rear shell 12 are provided with annular grooves in cooperation with the magnetic attraction rings 31, an electromagnetic layer one is arranged at the bottom of the annular grooves, friction detection modules are arranged on the two sides of the annular grooves, a plurality of connecting frames 32 are connected between the magnetic attraction rings 31 at intervals, the connecting frames 32 are connected with push plates 33 towards the inner side, the push plates 33 are arranged obliquely and the inclined surfaces correspond to the positions of the air flow window 13, the fan 2 is provided with a vortex plate 21 in cooperation with the impurity detection assembly, and the vortex plate 21 is fixed between the intermediate plate 11 and the rear shell 12.

[0023] Based on the above structure, the following supplementary explanations are given: the vortex plate 21 comprises a vortex area 211 and an outlet area 212, the vortex area 211 is wrapped outside the impurity detection assembly, and the outlet area 212 is connected with the vortex area 211 and is open at the upper end and communicates with the upper side of the main shell 1. In a normal state, the electromagnetic layer one is not electrified, and at this time, the magnetic attraction rings 31 are rotatably matched with the annular grooves. When the fan 2 starts to draw in the airflow, after the airflow passes through the filter screen assembly, it hits the surface of the push plate 33 through the air flow window 13, the wind power drives the push plate 33 to drive the magnetic attraction rings 31 to rotate in the annular grooves, the friction detection modules detect the friction force in the rotating process of the magnetic attraction rings 31 to evaluate the rotating speed, and the air flow window 13 is judged whether to be blocked or whether too many impurities are carried in the airflow, so as to judge whether the filter screen assembly works normally. The airflow driven to rotate flows to the outlet area 212 along the rotating direction at the same time, and finally is transported out of the main shell 1.

[0024] The filter screen assembly comprises a primary filter screen 41, a medium filter screen 42 and a high-efficiency filter screen 43, the primary filter screen 41 is used for intercepting large-particle dust and impurities, the medium filter screen 42 is mainly used for fine particles, and the high-efficiency filter screen 43 is responsible for removing harmful gases and microorganisms such as bacteria, the primary filter screen 41, the medium filter screen 42 and the high-efficiency filter screen 43 are connected in sequence and closely, so as to ensure the cleanliness of the air outlet.

[0025] Optionally, the primary filter screen 41 is a thin plate provided with a plurality of grid holes, the size of the grid holes meets the requirement of intercepting large-volume impurities, the medium filter screen 42 is a plurality of superimposed HEPA filter screens, the fine particles are intercepted through the high-density and small-aperture fiber mesh, and the high-efficiency filter screen 43 is an activated carbon filter screen, the harmful gases and odors can be effectively adsorbed through the high specific surface area and porous structure.

[0026] Further, as shown in Figure 5 , the high-efficiency filter screen 43 is provided with at least four dual-purpose grooves 431 at the edge, the groove bottom of the dual-purpose groove 431 is paved with an electromagnetic layer two, the side of the dual-purpose groove 431 is paved with an electromagnetic layer three, the dual-purpose groove 431 is connected with an extension spring 44, the side of the medium-efficiency filter screen 42 facing the high-efficiency filter screen 43 is connected with an extension pipe 421 corresponding to the dual-purpose groove 431, the extension pipe 421 is provided in a hollow structure and connected with the other end of the extension spring 44 inside, and the extension pipe 421 is in sliding fit with the dual-purpose groove 431.

[0027] Further, the high-efficiency filter screen 43 is provided with a ring of sealing grooves 432 at the side facing the medium-efficiency filter screen 42, and the medium-efficiency filter screen 42 is provided with a sealing block 422 corresponding to the sealing groove 432, and the depth of the sealing groove 432 matches the height of the sealing block 422.

[0028] In actual operation, preferably, the depth of the sealing groove 432 is greater than the depth of the dual-purpose groove 431, and the outer surface of the extension pipe 421 is made of adsorbable material. In a normal state, the extension spring 44 is in a contracted state, at this time, the medium-efficiency filter screen 42 is closely attached to the high-efficiency filter screen 43, the extension pipe 421 is completely located in the dual-purpose groove 431, the electromagnetic layer three is kept in an energized state, the outer surface of the extension pipe 421 is gripped, and at the same time, the sealing block 422 is completely located in the sealing groove 432. When it is detected that the filtering effect of the filter screen assembly is not ideal, the electromagnetic layer three is de-energized, the medium-efficiency filter screen 42 is driven to impact the primary filter screen 41 by the elastic force of the extension spring 44, and the impurities attached to the surfaces of the primary filter screen 41 and the medium-efficiency filter screen 42 are tried to be shaken off, thereby achieving a temporary dredging effect. During this period, the fan 2 does not work, and the sealing groove 432 and the sealing block 422 are used to strengthen the sealing between the primary filter screen 41 and the medium-efficiency filter screen 42, so as to avoid the overflow of dust and impurities. After the impact is completed, the electromagnetic layer two is energized to attract the extension spring 44 to contract, so that the extension pipe 421 is retracted into the dual-purpose groove 431, and finally the electromagnetic layer three is re-energized to grip the extension pipe 421. During this period, the above steps can be circulated to realize repeated impact. Further, by locating the extension pipe 421 at different depths in the dual-purpose groove 431 and switching the electromagnetic layer three, the impact force can be adjusted.

[0029] In one embodiment, as shown in Figure 6 , Figure 7 , the fan 2 comprises a shell 22, a plurality of standby airflow grooves 221 are formed at the bottom circumference of the shell 22, a plurality of rotating rods 23 are rotatably arranged in the standby airflow grooves 221, a valve plate 24 is sleeved on the rotating rod 23, and the valve plate 24 is provided in a structure with a wide middle and thin two ends.

[0030] As shown in Figures 8-10As shown, the end of the rotating rod 23 is sleeved with gear one 231, which is connected with gear ring 25, which is rotatably arranged in the shell 22. The gear ring 25 is connected with a plurality of gear two 26, which is connected with a micro driver 27. The shell 22 is provided with a corresponding placement space.

[0031] In actual operation, the deflection state of the valve plate 24 is controlled to adjust the opening and closing state of the standby air flow groove 221. When the standby air flow groove 221 is closed, the valve plate 24 is tilted to one side, at which time the adjacent valve plates 24 are in contact with each other, the valve plates 24 on both sides of the standby air flow groove 221 are in contact with the surface of the standby air flow groove 221, forming an internal and external seal, at which time the air flow drawn by the fan 2 can only pass through the air flow window 13 located on the periphery of the shell 22. When it is detected that the peripheral air flow window 13 is blocked, resulting in a serious air flow, the standby air flow groove 221 is opened to introduce air flow into the shell 22 and lead out through the standby air flow groove 221. The micro driver 27 controls the gear ring 25 to rotate forward or reverse through the gear two 26, thereby driving the gear one 231 to rotate, so that the rotating rod 23 drives the valve plate 24 to rotate synchronously, realizing the deflection of the valve plate 24. When the valve plate 24 is tilted to one side to close, the wide middle part of the adjacent valve plate 24 can be tightly attached to form a continuous sealing barrier, and the valve plate 24 at both ends of the standby air flow groove 221 can be tightly attached to the groove wall. Preferably, a torsional spring is connected between the valve plate 24 and the rotating rod 23 for providing a rotation allowance.

[0032] Optionally, as shown in the figure, Figure 2 The end of the push plate 33 is connected with a cotton block 34, which is tightly attached to the surface of the shell 22.

[0033] It should be noted that the cotton block 34 is used for protection and buffering. The specific effects are as follows: ① Prevent structural wear and tear: The push plate 33 will drive the entire magnetic attraction ring 31 mechanism to rotate in the annular groove under the action of air flow. If there is no cotton block 34, the end of the push plate 33 made of metal or hard plastic will directly rub and collide with the surface of the shell 22 of the fan 2. Long-term operation will inevitably cause scratches and wear on the surface of the shell 22, and even plastic deformation or cracks may occur due to continuous impact, affecting the service life of the equipment.

[0034] ② Provide a rotation allowance: The cotton block 34, as a soft material, has a certain compressibility. This can provide a small buffer space for the rotation of the push plate 33, ensuring smooth rotation of the mechanism even when there is a small tolerance in assembly or the parts are heated and expanded, avoiding jamming or abnormal noise. It is equivalent to a "soft contact" limit block.

[0035] ③ Wipe clean: Because the mop 34 and the surface of the shell 22 are "tightly attached", when the push plate 33 drives the mop 34 to rotate on the surface of the shell 22, it will naturally wipe the surface of the shell 22. This action can remove a small amount of light dust attached to the shell 22, preventing dust from accumulating there.

[0036] The main shell 1 is connected with the front shell 14 for limiting the filter screen assembly from separating from the main shell 1.

[0037] The impurity detection assembly detection process is as follows: Step one: the standby air flow groove 221 is closed, the fan 2 is started, and the external air is sucked in, sequentially passing through the primary filter screen 41, the medium filter screen 42 and the high-efficiency filter screen 43, and the purified airflow passes through the airflow window 13 on the intermediate plate 11 and hits the surface of the inclined push plate 33.

[0038] Step two: the kinetic energy of the airflow generates a pushing force on the push plate 33, and under the continuous action of the airflow, the magnetic attraction ring 31 starts to rotate in the annular groove of the intermediate plate 11 and the rear shell 12.

[0039] Step three: the friction detection module (usually a high-precision friction sensor or a current sensor related to rotational damping) installed on both sides of the annular groove starts to work. It monitors the friction force received by the magnetic attraction ring 31 in real time. The faster the rotation speed, the higher the frequency of the detected friction signal change per unit time. By monitoring the frequency or characteristics of the friction signal, the real-time rotation speed of the magnetic attraction ring 31 can be accurately calculated.

[0040] Step four: after pushing the push plate 33, the airflow is guided to the vortex area 211 of the vortex plate 21 along the rotation direction of the magnetic attraction ring 31, then flows out from the outlet area 212, and finally is discharged from the device by the fan 2.

[0041] Further, under a certain power level of the fan 2, the rotation speed of the magnetic attraction ring 31 stabilizes in an expected and reasonable range, indicating that the airflow is smooth, the filter screen assembly has good permeability, and the air impurity concentration is at a normal level. This is the normal state.

[0042] If the fan 2 power remains unchanged, but the rotation speed of the magnetic attraction ring 31 significantly decreases. Or, in order to maintain a certain air volume, the fan 2 power automatically increases, but the rotation speed of the magnetic attraction ring 31 does not increase, but decreases or remains unchanged. It is judged that the filter screen assembly may need to be cleaned or replaced, or the current environmental air quality is extremely poor (such as severe haze). At this time, the "vibration self-cleaning" function of the filter screen assembly is automatically started. This is the filter screen clogging or excessive impurities state.

[0043] If the fan 2 is running at a high power, but the speed of the magnetic attraction ring 31 is zero or close to zero (i.e. stopped), it indicates that the air flow at the air flow window 13 is weak enough to push the push plate 33. Usually, the filter screen is severely clogged, or the air flow passage is blocked by other foreign matter. Start the standby scheme: open the standby air flow groove 221 on the shell 22 of the fan 2 to ensure that the device still has basic ventilation capacity, preventing the fan 2 from being damaged by overloading due to idling. This is the state of severe clogging of the filter screen or blockage of the air flow passage.

[0044] Furthermore, the air flow is adjusted according to the rotation angle and deflection direction of the valve plate 24. Deflected to one side to completely close (the adjacent valve plate 24 closely fits), which is the default working state, at this time the standby air flow groove 221 is completely sealed, and all air flow must pass through the main passage. Deflected to the other side at different angles (open), small angle open: the standby air flow groove 221 opens a gap, introducing a small amount of air flow as a supplement. Medium angle open: the opening degree of the passage increases, introducing more air flow to maintain the basic air volume. Large angle or even completely open: the standby passage is completely open, which maximizes the air flow to prevent the fan 2 from being damaged, but at this time the purification effect has been significantly reduced.

[0045] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0046] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-stage high-efficiency air purifier filter core structure, comprising a filter screen assembly, a main shell (1), a fan (2) and a impurity detection assembly, characterized in that, The main shell (1) is fixed with an intermediate plate (11), the filter screen assembly is assembled on one side of the intermediate plate (11), the fan (2) is installed on the other side of the intermediate plate (11), the impurity detection assembly is arranged on the fan (2), the other side of the fan (2) is covered with a rear shell (12), the intermediate plate (11) is provided with an air flow window (13) matched with the fan (2), the impurity detection assembly comprises a pair of magnetic attraction rings (31) rotatably arranged on the intermediate plate (11) and the rear shell (12) respectively, the magnetic attraction rings (31) are covered outside the fan (2), the magnetic attraction rings (31) are made of adsorbable material, the intermediate plate (11) and the rear shell (12) are provided with annular grooves matched with the magnetic attraction rings (31), the bottom of the annular groove is paved with an electromagnetic layer one, the two sides of the annular groove are paved with friction force detection modules, a plurality of connecting frames (32) are connected between the magnetic attraction rings (31), the connecting frames (32) are connected with push plates (33) towards the inside, the push plates (33) are obliquely arranged and the inclined surface corresponds to the position of the air flow window (13), the fan (2) is provided with a vortex plate (21) matched with the impurity detection assembly, and the vortex plate (21) is fixed between the intermediate plate (11) and the rear shell (12).

2. The multi-stage high-efficiency air cleaner cartridge structure of claim 1, wherein, The vortex plate (21) comprises a vortex area (211) and an outlet area (212), the vortex area (211) is wrapped outside the impurity detection assembly, and the outlet area (212) is connected with the vortex area (211) and the upper end opening is communicated with the upper side of the main shell (1).

3. The multi-stage high efficiency particulate air filter cartridge structure of claim 2 wherein, The filter screen assembly comprises a primary filter screen (41), a medium-efficiency filter screen (42) and a high-efficiency filter screen (43), and the primary filter screen (41), the medium-efficiency filter screen (42) and the high-efficiency filter screen (43) are connected in sequence.

4. The multi-stage high efficiency particulate air filter cartridge structure of claim 3, wherein, The primary filter screen (41) is made of a thin plate provided with a plurality of grid holes, the size of the grid hole meets the requirement of intercepting large-volume impurities, the medium-efficiency filter screen (42) is made of a plurality of HEPA filter screens stacked, and fine particles are intercepted through a high-density and small-aperture fiber mesh, and the high-efficiency filter screen (43) is made of an activated carbon filter screen, and harmful gases and odors are effectively adsorbed through a high specific surface area and a porous structure.

5. The multi-stage high efficiency particulate air filter cartridge structure of claim 4 wherein, At least four dual-purpose grooves (431) are formed in the edge of the high-efficiency filter screen (43), an electromagnetic layer two is paved on the groove bottom of the dual-purpose groove (431), an electromagnetic layer three is paved on the side surface of the dual-purpose groove (431), a telescopic spring (44) is connected to the groove bottom of the dual-purpose groove (431), a telescopic pipe (421) is connected to the side of the medium-efficiency filter screen (42) corresponding to the dual-purpose groove (431), the telescopic pipe (421) is provided in a hollow structure and connected with the other end of the telescopic spring (44) inside, and the telescopic pipe (421) is in sliding connection with the dual-purpose groove (431).

6. The multi-stage high efficiency particulate air filter cartridge structure of claim 5 wherein, The high-efficiency filter screen (43) is provided with a sealing groove (432) on one side of the medium-efficiency filter screen (42), the medium-efficiency filter screen (42) is provided with a sealing block (422) corresponding to the sealing groove (432), and the depth of the sealing groove (432) matches the height of the sealing block (422).

7. The multi-stage high efficiency particulate air filter cartridge structure of claim 6 wherein, The depth of the sealing groove (432) is greater than the depth of the dual-purpose groove (431), and the outer surface of the telescopic pipe (421) is made of adsorbable material.

8. The multi-stage high efficiency particulate air cleaner cartridge structure of claim 7, wherein, The fan (2) comprises a shell (22), a plurality of standby airflow grooves (221) are arranged on the bottom circumference of the shell (22), a plurality of rotating rods (23) are rotatably arranged in the standby airflow grooves (221), valve plates (24) are sleeved on the rotating rods (23), and the valve plates (24) are arranged in a structure with wide middle part and thin both ends.

9. The multi-stage high efficiency particulate air cleaner cartridge structure of claim 8, wherein, One end of the rotating rod (23) is sleeved with a gear one (231), the gear one (231) is connected with a gear ring (25) in a matched mode, the gear ring (25) is rotatably arranged in the shell (22), a plurality of gear twos (26) are connected with the gear ring (25) in a matched mode, a micro drive (27) is connected with the gear two (26), and the shell (22) is provided with corresponding placing spaces in a matched mode.

10. The multi-stage high efficiency particulate air cleaner cartridge structure of claim 9, wherein, The end of the push plate (33) is connected with a cotton block (34), and the cotton block (34) is attached to the surface of the shell (22).

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