Self-dedusting air filtering device

Abstract

The invention discloses a self-dedusting air filtering device. The device comprises a device shell, a filter unit is arranged in the device shell, an air inlet and an air outlet are formed in the device shell, the filter unit is arranged between the air inlet and the air outlet in a sealed mode, the side, facing the air inlet, of the filter unit forms an air inlet side, and the side, facing the air outlet, of the filter unit forms an air outlet side. The air sequentially passes through the air inlet side, the filtering unit and the air outlet side and is exhausted from the air outlet; the airflow generation device is arranged in the device shell and located on the air outlet side of the filtering unit, an airflow generation end and an airflow suction end are arranged on the airflow generation device, and the airflow generation end is arranged towards the filtering unit and can controllably generate high-pressure airflow; and the connecting unit is arranged in the device shell and is used for connecting the airflow generating device into the device shell. According to the self-dedusting air filtering device, the dedusting efficiency can be improved, and the service life of the self-dedusting air filtering device can be prolonged.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of air purification. Specifically, they relate to a self-dust-removing air filtration device. Background Technology

[0002] In high-dust environments such as mining, construction, metallurgical smelting, and field engineering operations, a large number of suspended dust particles in the air can easily enter the intake or recirculation airflow channels of production equipment (such as engines, ventilation units, and precision machining instruments). This dust can cause wear and tear on internal components, blockage of air passages, leading to decreased equipment operating efficiency, shortened service life, and even malfunctions and shutdowns. Therefore, it is necessary to use a filtration system to intercept dust in the air to ensure stable equipment operation.

[0003] Currently, three main types of filtration system technologies have emerged for high-dust environments. **Density Filters:** These are based on traditional paper filters. They utilize the dense fibrous structure of the paper filter element to intercept airborne dust particles, achieving dust filtration through density differences in the filter material. This is one of the mainstream solutions with high filtration accuracy. **Centrifugal Filters:** Designed based on the inertial motion characteristics of large dust particles, these filters separate dust from the air through centrifugal force generated by airflow rotation. Common forms include oil bath filters (using an oil film to adsorb centrifugally separated dust), desert filters (dedicated centrifugal structures adapted for extreme sandstorm environments), and cyclone separators (enhancing inertial dust separation through cyclone channels). **Pulse Jet Filters:** These employ a two-stage filtration structure with a pre-filter and a main filter connected in series. The pre-filter initially intercepts large dust particles, and the removal of surface dust relies on the impact of compressed pulse gas. Periodic pulse airflow achieves self-cleaning of the filter element, thus ensuring the continuous filtration performance of the main filter.

[0004] In practical applications: While density filters offer high filtration accuracy, their paper filter elements are prone to clogging and failure due to dust. Furthermore, maintenance requires disassembling the equipment, replacing or cleaning the filter elements, making the process cumbersome and difficult, with extremely poor maintenance convenience. Centrifugal filters rely solely on dust inertia for separation, exhibiting weak interception capabilities for fine dust, resulting in low overall filtration efficiency. Simultaneously, both centrifugal and density filters require manual maintenance, which is not only labor-intensive but also prone to inconsistencies in cleaning / replacement, leading to incomplete maintenance and directly impacting filtration performance. The pre-filter function of pulse jet dust collectors relies entirely on compressed pulse gas. However, most high-dust applications (such as field mines and temporary construction areas) lack a stable supply of compressed gas, preventing the pulse jet dust collection function from starting properly. Adding a compressor to the system significantly increases equipment costs and complicates the filtration system structure, increasing the number of components. This not only expands the system size but also increases the risk of failure due to the complexity of multi-component coordination, reducing operational stability. Summary of the Invention

[0005] The main objective of this application is to provide a self-dust-removing air filtration device that can improve its own dust removal efficiency and service life.

[0006] This invention provides a self-cleaning air filtration device. The self-cleaning air filtration device includes: a housing containing a filter unit; an air inlet and an air outlet on the housing; the filter unit sealed between the air inlet and the air outlet; the side of the filter unit facing the air inlet forming an intake side, and the side facing the air outlet forming an outlet side; wherein external gas enters the housing through the air inlet, passes sequentially through the intake side, the filter unit, and the outlet side, and is discharged from the outlet; an airflow generator disposed within the housing and located on the outlet side of the filter unit; the airflow generator having an airflow generating end and an airflow suction end; wherein the airflow generating end is oriented towards the filter unit and is capable of controllably generating high-pressure airflow; and a connecting unit disposed within the housing for connecting the airflow generator to the housing. When the airflow generating device is working, the airflow generating end generates high-pressure airflow towards the filter unit. After the high-pressure airflow enters the filter unit, a high air pressure difference region is formed inside the filter unit, while the remaining positions of the filter unit form a low air pressure difference region. A circulating airflow is generated between the high air pressure difference region and the low air pressure difference region through the air inlet side and the air outlet side.

[0007] In some embodiments, the connecting unit is configured as a first rotating mechanism, which includes: a first rotating shaft with its axis arranged vertically, the first rotating shaft rotating and being limited and connected to the device housing and the filter unit; a first driving unit disposed on the device housing and connected to the first rotating shaft for driving the first rotating shaft to rotate; a linkage connecting component, one end of which is connected to the first rotating shaft and the other end of which is fixed to the airflow generating device; and a power supply unit disposed on the first rotating shaft for supplying power to the airflow generating device; wherein, the first rotating shaft, driven by the first driving unit, can drive the linkage connecting component to rotate simultaneously, and the high-pressure airflow generated by the airflow generating device, driven by the linkage connecting component, can cover the air outlet side of the filter unit during rotation.

[0008] In some embodiments, the linkage connection component includes: a first rotating connector, one end of which is sleeved on a first rotating shaft; and a limiting assembly unit for positioning the first rotating connector on the first rotating shaft. The limiting assembly unit includes: an elastic abutment unit sleeved on the first rotating shaft, the two ends of which elastically abut against the shoulders of the first rotating connector and the first rotating shaft; a guide groove formed axially on the outer wall of the first rotating shaft; and a limiting slider, one end of which passes through the first rotating connector and is slidably disposed in the guide groove, and the other end of which is fixed to the first rotating connector.

[0009] In some embodiments, the first rotating mechanism further includes a top bearing disposed on the device housing and a bottom bearing disposed on the filter unit, with both ends of the first rotating shaft rotatably disposed within the top bearing and the bottom bearing, wherein the end of the first rotating shaft connected to the bottom bearing is constructed as a conical structure.

[0010] In some embodiments, the linkage connection component includes: a second rotating connector, one end of which is fixed to a first rotating shaft; and a second rotating mechanism disposed at the other end of the second rotating connector, the second rotating mechanism including: a second rotating shaft, the axis of which is arranged vertically, a first end of which is rotatably connected to the second rotating connector; a second driving unit disposed on the second rotating connector and connected to the first end for driving the second rotating shaft to rotate; and a third rotating connector, one end of which is fixed to the second rotating shaft so as to be driven by the second rotating shaft and rotate simultaneously, the airflow generating device being disposed on the third rotating connector. Wherein, the first rotating shaft and the second rotating shaft rotate simultaneously, and the high-pressure airflow generated by the airflow generating device can cover the outlet side of the filter unit during the simultaneous rotation of the first rotating shaft and the second rotating shaft.

[0011] In some embodiments, a control unit is also included. There are N airflow generating devices. The control unit is electrically connected to the N airflow generating devices. The control unit is configured to individually control the airflow generating devices to generate forward or reverse airflow. When the control unit drives the airflow generating device to generate forward airflow, the airflow generating end generates high-pressure airflow and the airflow intake end draws in gas. When the control unit drives the airflow generating device to generate reverse airflow, the airflow intake end generates high-pressure airflow and the airflow generating end draws in gas.

[0012] In some embodiments, a control unit is further included. There are N linkage connection components, where N > 1. The N linkage connection components are arranged along the outer peripheral wall of the first rotating shaft. The control unit is electrically connected to the airflow generating devices on the N linkage connection components. The control unit is configured to individually control the airflow generating devices to generate forward or reverse airflow. When the control unit drives the airflow generating devices to generate forward airflow, the airflow generating end generates high-pressure airflow, and the airflow intake end draws in gas. When the control unit drives the airflow generating devices to generate reverse airflow, the airflow intake end generates high-pressure airflow, and the airflow generating end draws in gas. The control unit is used to individually control each airflow generating device to generate airflow.

[0013] In some embodiments, the airflow generating device includes: an airflow channel having an airflow generating end on one side facing the filter unit and an airflow intake end on the other side; and a rotary drive device disposed within the airflow channel, the drive end of the rotary drive device having rotating blades. The rotary drive device is configured to drive the rotating blades to rotate forward and backward, thereby enabling the airflow generating device to generate forward and reverse airflow.

[0014] In some embodiments, the peripheral wall of the airflow generating end is constructed as an inclined or arc-shaped wall, and the airflow generating end is constructed as a strip nozzle arranged parallel to the surface of the filter unit, wherein, during the rotation of the first rotating mechanism, the high-pressure airflow ejected from the strip nozzle can cover the air outlet side of the filter unit.

[0015] In some embodiments, the power supply unit includes a first conductive ring group and a second conductive ring group sleeved on the first rotating shaft and the second rotating shaft, the first conductive ring group and the second conductive ring group being used to supply power to the second drive unit and the airflow generating device, respectively.

[0016] The technical solutions provided by the embodiments of this application may include the following beneficial effects: In this application, the self-dust-removing air filter of the present invention employs a built-in airflow generator, which forms a high-pressure differential region and a low-pressure differential region from the high-pressure airflow. Then, a circulating airflow is generated through the inlet and outlet sides to efficiently remove dust from the filter unit. Compared with the prior art, this self-dust-removing air filter achieves precise dust removal. Furthermore, the dust removal process does not rely on an external air source, effectively solving the air supply and sealing problem, thereby reducing the difficulty of design and manufacturing, and exhibiting low energy consumption and significant effect. This self-dust-removing air filter does not require atmospheric circulation, resulting in less environmental pollution. Its gas supply is unlimited, and the pressure differential is easily controlled, thus reducing the damage rate of the self-dust-removing air filter. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 A schematic diagram of the structure of the first embodiment of the self-dust-removing air filtration device provided in this application; Figure 2 A schematic diagram of the structure of a second embodiment of the self-dust-removing air filtration device provided in this application; Figure 3 A schematic diagram of the third embodiment of the self-dust-removing air filtration device provided in this application; Figure 4 A schematic diagram of the fourth embodiment of the self-dust-removing air filtration device provided in this application; Figure 5 This is a system connection diagram of the control unit of the self-dust-removing air filter device provided in this application.

[0018] Reference numerals: 1-Device housing; 11-Air inlet; 12-Air outlet; 2-Filter unit; 21-Inlet side; 22-Outlet side; 3-Airflow generator; 311-Airflow channel; 312-Airflow intake end; 313-Airflow generator end; 314-Rotation drive device; 315-Rotation blade; 32-First rotating shaft; 322-First drive unit; 4-Connecting unit; 42-Second rotating connector; 43-Second rotating mechanism; 431-Second rotating shaft; 432-Second drive unit; 433-Third rotating connector; 44-First rotating connector; 45-Limiting combination unit; 451-Elastic abutment unit; 452-Guide groove; 453-Limiting slider; 5-Power supply unit; 51-First conductive ring group; 52-Second conductive ring group; 6-Control unit; 61-Circulation module; 62-Reversing module. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] Figures 1 to 4 Different embodiments of the self-dust-removing air filtration device 100 provided according to the present invention are shown. Figure 1 For example, Figure 1As shown, the self-cleaning air filtration device 100 includes: a device housing 1, which houses a filter unit 2. The device housing 1 has an air inlet 11 and an air outlet 12. The filter unit 2 is sealed between the air inlet 11 and the air outlet 12. The side of the filter unit 2 facing the air inlet 11 is formed as an air intake side 21, and the side facing the air outlet 12 is formed as an air outlet side 22. External air enters the device housing 1 through the air inlet 11, passes through the air intake side 21, the filter unit 2, and the air outlet side 22 in sequence, and is discharged from the air outlet 12. An airflow generating device 3 is disposed inside the device housing 1 and located on the air outlet side 22 of the filter unit 2. The airflow generating device 3 has an airflow generating end 313 and an airflow suction end 312. The airflow generating end 313 is positioned facing the filter unit 2 and can controllably generate high-pressure airflow. A connecting unit 4 is disposed inside the device housing 1 and is used to connect the airflow generating device 3 to the device housing 1. When the airflow generating device 3 is working, the airflow generating end 313 generates high-pressure airflow towards the filter unit 2. After the high-pressure airflow enters the filter unit 2, a high air pressure difference region is formed inside the filter unit 2, and the remaining positions of the filter unit 2 form a low air pressure difference region. The high air pressure difference region and the low air pressure difference region generate circulating airflow through the air inlet side 21 and the air outlet side 22.

[0021] In practical use, the self-cleaning air filtration device 100 according to an embodiment of the present invention allows gas to enter the device housing 1 through the air inlet 11. The gas entering the housing 1 passes through the air inlet side 21 of the filter unit 2 for filtration, and then exits through the air outlet side 22, thus completing the gas filtration process. During filtration, dust particles in the gas are blocked on the outer wall of the filter unit 2 and collected after being filtered. When dust removal is required after a period of operation, the airflow generator 3 starts working and generates a high-pressure airflow. This high-pressure airflow is sprayed towards the filter unit 2, carrying away and cleaning the dust on the outer wall of the filter unit 2 as it passes through it. Simultaneously, the high-pressure airflow area forms a high-pressure region, while other areas form low-pressure regions. Gas in the low-pressure regions is drawn into the airflow generator 3 to generate a circulating airflow. This provides a continuous air supply to the airflow generator 3, allowing the generated high-pressure airflow to continuously clean the dust adhering to the outer wall of the filter unit 2, thereby achieving dust removal.

[0022] With the above-described configuration, when the external device of the self-dust-removing air filter 100 of this invention stops working, the built-in airflow generator 3 generates a high-pressure airflow to remove dust from the filter unit 2. Compared with the prior art, this self-dust-removing air filter 100 achieves precise dust removal. Furthermore, the dust removal process does not rely on an external air source, effectively solving the air supply and sealing problem, thereby reducing the design and manufacturing difficulty of the self-dust-removing air filter 100, and exhibiting low energy consumption and significant effect. In addition, this self-dust-removing air filter 100 does not require atmospheric circulation, resulting in less environmental pollution. Its gas supply is unlimited, and the pressure difference is easy to control, thus reducing the damage rate of the self-dust-removing air filter 100.

[0023] It should be added that the self-cleaning air filter 100 according to the embodiments of the present invention is recommended to be cleaned when the external equipment is not in operation. For example, when the engine in which it is applied is turned off and no more gas enters the self-cleaning air filter 100, the filter unit 2 is cleaned, and the dust removal effect is better at this time.

[0024] The self-dust-removing air filtration device 100 according to embodiments of the present invention is applicable to various production equipment and spaces, such as production equipment like engines, ventilation units, and processing instruments, as well as enclosed production spaces like vehicle cabs, clean rooms, control rooms, residences, and factories. The self-dust-removing air filtration device 100 of the present invention can be connected in parallel to achieve a larger air intake volume for the filtration system.

[0025] In this application, the filter unit 2 has several filter elements (e.g., filter paper inside the filter element) arranged concentrically and vertically inside, and the center line of the filter unit 2 can be arranged vertically inside the device housing 1. The filter unit 2 can be, for example, a honeycomb filter, with the air inlet 11 located at the bottom of the honeycomb filter, the air outlet 12 located at the top of the honeycomb filter, and the airflow generating device 3 located above the honeycomb filter. Through the above arrangement, the filter elements of this embodiment change the air intake direction of the filter unit 2. After the gas enters the filter unit 2 through the air inlet 11, it is filtered by the filter elements, and the collected dust floats on the lower surface of the filter elements and hangs upside down on the inner wall of the filter elements. When the self-dust-removing air filtration device 100 is applied to vibration or bumpy usage scenarios, such as vehicles and other industrial and mining equipment, under the action of gravity, some dust can leave the filter unit 2 under vibration or bumpy conditions, thereby further extending the service life of the filter unit 2.

[0026] In some embodiments, the connecting unit 4 may be configured as a fixed connecting rod structure to fix the airflow generating device 3 inside the device housing 1.

[0027] Please refer to Figure 2In some embodiments, the connecting unit 4 may be configured as a first rotating mechanism, which may include: a first rotating shaft 32, the axis of which is arranged vertically, the first rotating shaft 32 rotating and being limited and connected to the device housing 1 and the filter unit 2; a first driving unit 322, which is disposed on the device housing 1 and connected to the first rotating shaft 32 for driving the first rotating shaft 32 to rotate; a linkage connecting component, one end of which is connected to the first rotating shaft 32, and the other end of which is fixed to the airflow generating device 3; and a power supply unit 5, which is partially disposed on the first rotating shaft 32 for supplying power to the airflow generating device 3; wherein, under the drive of the first driving unit 322, the first rotating shaft 32 can drive the linkage connecting component to rotate simultaneously, and the high-pressure airflow generated by the airflow generating device 3 under the drive of the linkage connecting component can cover the air outlet side 22 of the filter unit 2 during the rotation.

[0028] In this embodiment, rolling bearings can be fixed on the device housing 1 and the filter unit 2, and both ends of the first rotating shaft 32 are disposed within the rolling bearings. The first drive unit 322 can be a motor, which is fixed on the device housing 1. The drive shaft of the motor is mechanically connected to the shaft end of the first rotating shaft 32 through a worm gear mechanical transmission. A power supply unit 5 (e.g., a conductive ring) is sleeved on the first rotating shaft 32. The conductive ring forms an electrical contact with the first rotating shaft 32 by using conductive fibers or conductive bodies, and then realizes current conduction or power supply through a plug-in method. The conductive ring can be used to supply power to the airflow generating device 3.

[0029] In this embodiment, when the self-dust-removing air filter 100 is in use, the airflow generator 3 starts working when dust removal is required. The airflow generator 3 generates high-pressure airflow, and the first rotating mechanism works simultaneously. After the first drive unit 322 is powered, it drives the first rotating shaft 32 to rotate around the axis, causing the airflow generator 3 to rotate along the axis. The high-pressure airflow ejected from the airflow generating end 313 of the airflow generator 3 continuously forms a high pressure point, while other surrounding areas not in contact with the airflow generator 3 form low pressure points. After the high-pressure airflow is ejected towards the filter unit 2, the gas cleans the dust on the outer wall of the filter unit 2 as it passes through the filter paper inside the filter element. During the cleaning process, the area of ​​the airflow generating end 313 (forming the jet nozzle) is continuously maintained at a positive pressure, and the airflow intake end 312 (forming the jet nozzle) is continuously maintained at a negative pressure to provide a continuous air supply, so that the airflow generating end 313 can continuously clean the dust adhering to the outer wall inside the filter unit 2, thereby completing the dust removal work.

[0030] With the above configuration, the self-dust-removing air filter 100 according to the embodiment of the present invention rotates the first rotating shaft 32 and simultaneously drives the airflow generating device 3 to rotate. The high-pressure airflow generated by the airflow generating device 3 can cover the filter unit 2 during the rotation process, so that it can clean the filter unit 2 row by row along the rotation trajectory of the first rotating shaft 32, thereby covering a larger area of ​​the dust removal range of the filter unit 2 and providing support for the next operation of the self-dust-removing air filter 100.

[0031] Please continue to refer to Figure 2 In some embodiments, the linkage connection component may include: a first rotating connector 44, one end of which is sleeved on the first rotating shaft 32; and a limiting combination unit 45, which is used to position the first rotating connector 44 on the first rotating shaft 32. The limiting combination unit 45 may include: an elastic abutment unit 451, which is sleeved on the first rotating shaft 32, and both ends of the elastic abutment unit 451 elastically abut against the shoulders of the first rotating connector 44 and the first rotating shaft 32; a guide groove 452, which is formed axially on the outer wall of the first rotating shaft 32; and a limiting slider 453, one end of which passes through the first rotating connector 44 and is slidably disposed in the guide groove 452, and the other end of which is fixed to the first rotating connector 44.

[0032] In this application, the drive shaft of the motor is mechanically connected to the shaft end of the first rotating shaft 32 via a worm gear transmission. A compression spring is provided between the worm gear and the rolling bearing at the shaft end of the first rotating shaft 32. A conductive ring is fitted on the shoulder (boss) of the first rotating shaft 32. The conductive ring forms electrical contact with the first rotating shaft 32 using conductive fibers or conductive bodies, and then current is discharged or power is supplied through a plug-in method. The conductive ring can be used to supply power to the airflow generating device 3. An elastic abutment unit 451 (e.g., a return spring) is installed on the lower side of the conductive ring. The airflow generating device 3 is connected to the lower part of the elastic abutment unit 451 via a first rotating connector 44. The first rotating connector 44 is connected to the first rotating shaft 32 via a guide groove 452 and a limiting slider 453, and can rotate simultaneously with the first rotating shaft 32 under the limiting of the two. At the same time, the cooperation of the guide groove 452 and the limiting slider 453 also allows the first rotating connector 44 to slide up and down along the axial direction of the first rotating shaft 32. The elastic abutment unit 451 is used to press the first rotating connector 44 tightly against the rolling bearing located below. Under the pressure of the elastic abutment unit 451, the first rotating connector 44 rotates tightly against the rolling bearing, thereby effectively ensuring the gap between the airflow generating device 3 and the filter unit 2.

[0033] In some embodiments, the first rotating mechanism may further include a top bearing disposed on the device housing 1 and a bottom bearing disposed on the filter unit 2, with both ends of the first rotating shaft 32 rotatably disposed within the top bearing and the bottom bearing, wherein the end 321 of the first rotating shaft 32 connected to the bottom bearing is configured as a conical structure.

[0034] In this embodiment, the lower end of the first rotating shaft 32 can be constructed in a conical shape to facilitate passing through the center of the lower rolling bearing. During the inspection and maintenance of the self-dust-removing air filter device 100, the plug-in connection formed between the first rotating shaft 32 and the rolling bearing can be separated first, and the first rotating shaft 32 and the airflow generating device 3 can be directly removed as a whole through the first rotating connector 44 to replace or maintain its components and filter unit 2. After replacement or maintenance, the conical lower end of the first rotating shaft 32 is first inserted into the bearing hole of the lower rolling bearing. Guided by the bearing hole, the airflow generating device 3 and other components are simultaneously reinstalled in their original positions. Under the combined action of the return spring and the bracket (lower support) of the lower rolling bearing, the airflow generating device 3 is reinstalled in the designated position, thereby realizing the installation and maintenance of the self-dust-removing air filter device 100 according to the embodiment of the present invention.

[0035] Please refer to Figure 3 In some embodiments, the linkage connection component may include: a second rotating connector 42, one end of which is fixed to the first rotating shaft 32; and a second rotating mechanism 43, which is disposed at the other end of the second rotating connector 42. The second rotating mechanism 43 includes: a second rotating shaft 431, the axis of which is arranged in a vertical direction, and the first end of the second rotating shaft 431 is rotatably connected to the second rotating connector 42; a second driving unit 432, which is disposed on the second rotating connector 42 and connected to the first end, for driving the second rotating shaft 431 to rotate; and a third rotating connector 433, one end of which is fixed to the second rotating shaft 431, so that it can be driven by the second rotating shaft 431 and rotate simultaneously. An airflow generating device 3 is disposed on the third rotating connector 433. Wherein, the first rotating shaft 32 and the second rotating shaft 431 rotate simultaneously, and the high-pressure airflow generated by the airflow generating device 3 can cover the outlet side 22 of the filter unit 2 during the simultaneous rotation of the first rotating shaft 32 and the second rotating shaft 431.

[0036] Based on the installation method of the first rotating shaft 32 described above, the second rotating connector 42 can be a linkage structure or a turntable structure. In this embodiment, a rolling bearing can be fixed on the second rotating connector 42, and one end of the first rotating shaft 32 is disposed within the rolling bearing. The second drive unit 432 can be a motor, which is fixed on the second rotating connector 42. The drive shaft of the motor is mechanically connected to the shaft end of the second rotating shaft 431 through a worm gear mechanical transmission. A conductive ring can be fitted on the second rotating shaft 431. The conductive ring forms electrical contact with the second rotating shaft 431 by using conductive fibers or conductive bodies, and then realizes current output or power supply through a plug-in method. The conductive ring can be used to supply power to the second drive unit 432. The third rotating connector 433 can be a linkage structure or a turntable structure. The two ends of the linkage structure are respectively fixed to the second rotating shaft 431 and the airflow generating device 3. During the rotation of the second rotating shaft 431, the linkage structure presents a disc shape. The turntable structure can be fitted and fixed on the second rotating shaft 431 to form a turntable (self-rotating disc).

[0037] With the above configuration, the second rotating mechanism 43 rotates with the first rotating shaft 32, and the airflow generating device 3 rotates with the second rotating shaft 431, forming a revolution-rotation linkage rotation pattern to generate a circumferential high-pressure airflow along the surface of the filter unit 2. In this application, the airflow generating end 313 (jet nozzle) of the airflow generating device 3 is not limited in its specific shape. Combined with the revolution-rotation rotation pattern of the first rotating shaft 32 and the second rotating shaft 431 rotating in tandem, the high-pressure airflow ejected from the airflow generating end 313 can cover the surface of the filter unit 2, so that the high-pressure airflow generated by the airflow generating device 3 can clean the powder layer collected deep in the filter unit 2 row by row and point by point on the upper surface of the filter unit 2, thereby achieving a good cleaning effect.

[0038] Please refer to Figure 4 and Figure 5 In this embodiment, a control unit 6 is also included. There are N airflow generating devices 3. The control unit 6 is electrically connected to the N airflow generating devices 3. The control unit 6 is configured to individually control the airflow generating devices 3 to generate forward or reverse airflow. When the control unit 6 drives the airflow generating device 3 to generate forward airflow, the airflow generating end 313 generates high-pressure airflow and the airflow intake end 312 draws in gas. When the control unit 6 drives the airflow generating device 3 to generate reverse airflow, the airflow intake end 312 generates high-pressure airflow and the airflow generating end 313 draws in gas.

[0039] In this application, when the number N of airflow generating devices 3 is greater than 1, the control unit 6 can selectively control each airflow generating device 3 to stop, generate forward airflow, or generate reverse airflow individually.

[0040] When dust removal is required, the control unit 6 controls one airflow generator 3 to produce a positive high-pressure airflow, while the other produces a reverse high-pressure airflow. For example, firstly, the airflow generator 3 on the left side of the filter element produces a positive high-pressure airflow, and the airflow generator 3 on the right side of the filter element produces a reverse high-pressure airflow. This creates a high pressure differential area on the left side of the filter unit 2 and a low pressure differential area on the right side. The airflow circulates from the right to the left side of the filter unit 2 to remove dust from the left side. After a period of time, the control unit 6 simultaneously reverses the high-pressure airflow from both airflow generators 3 to remove dust from the right side of the filter unit 2 in the same way. Then, the airflow generators 3 standby, waiting for the next startup.

[0041] With the above setup, the two airflow generators 3 are connected in series during the dust removal process, which doubles the airflow pressure for dust removal and thus effectively improves the dust removal effect.

[0042] In some embodiments, a control unit 6 may also be included. There are N linkage connection components, where N > 1. The N linkage connection components are arranged along the outer peripheral wall of the first rotating shaft 32. The control unit 6 is electrically connected to the airflow generating device 3 on the N linkage connection components. The control unit 6 is configured to individually control the airflow generating device 3 to generate forward or reverse airflow. When the control unit 6 drives the airflow generating device 3 to generate forward airflow, the airflow generating end 313 generates high-pressure airflow, and the airflow intake end 312 draws in gas. When the control unit 6 drives the airflow generating device 3 to generate reverse airflow, the airflow intake end 312 generates high-pressure airflow, and the airflow generating end 313 draws in gas. The control unit 6 is used to individually control each airflow generating device 3 to generate airflow.

[0043] Please return Figure 1 In some embodiments, the airflow generating device 3 may include: an airflow channel 311 having an airflow generating end 313 formed on one side facing the filter unit 2, and an airflow intake end 312 formed on the other side; and a rotary drive device 314 disposed within the airflow channel 311, the drive end of the rotary drive device 314 having a rotating blade 315. The rotary drive device 314 is configured to drive the rotating blade 315 to rotate clockwise and counterclockwise, thereby enabling the airflow generating device 3 to generate forward and reverse airflow.

[0044] In this application, a rotary drive device 314 (e.g., a motor) drives a rotating blade 315 to rotate. The rotating blade 315 disturbs the airflow and ejects a high-pressure airflow inside the filter unit 2, creating a high-pressure differential region within the filter unit 2. Gas in the low-pressure differential region is then drawn in through the airflow intake end 312 (air inlet) via the outer side of the airflow channel 311, providing subsequent gas for circulation. During dust removal, the area at the airflow generation end 313 (air outlet) is under positive pressure, while the area not reached by the high-pressure airflow is under negative pressure, thereby continuously cleaning the dust adhering to the outer wall inside the filter unit 2 to complete the dust removal process.

[0045] Please refer to Figure 5 In some embodiments, the control unit 6 may include: a power supply for providing electrical energy; a circulation module 61 for supporting the logical sequence of dust removal operations; and a commutation module 62 for outputting positive and negative phase sequence voltages to the rotary drive 314.

[0046] In this application, when the airflow generating device 3 receives a positive phase sequence voltage, the rotary drive device 314 drives the rotating blade 315 to rotate forward to generate a positive airflow. When the airflow generating device 3 receives a negative phase sequence voltage, the rotary drive device 314 drives the rotating blade 315 to rotate in reverse to generate a reverse airflow.

[0047] Please refer to Figure 2 In some embodiments, the peripheral wall of the airflow generating end 313 is constructed as an inclined or arc-shaped wall, and the airflow generating end 313 is constructed as a strip-shaped nozzle arranged parallel to the surface of the filter unit 2. During the rotation of the first rotating mechanism, the high-pressure airflow ejected from the strip-shaped nozzle can cover the air outlet side 22 of the filter unit 2.

[0048] In this application, the peripheral wall of the airflow channel 311 of the airflow generating device 3 forming the jet nozzle can be constructed as an inclined or arc-shaped wall. The jet nozzle can be constructed as a strip-shaped nozzle arranged parallel to the surface of the filter unit 2. The high-pressure airflow ejected from the strip-shaped nozzle forms an air knife. During the rotation of the first rotating mechanism, the air knife airflow formed can cover the surface of the filter unit 2, so that the high-pressure airflow generated by the airflow generating device 3 can clean the powder layer collected in the deep layer row by row on the upper surface of the filter unit 2, thereby achieving a good cleaning effect.

[0049] Please refer to Figure 2 and Figure 3 In some embodiments, the power supply unit 5 may include a first conductive ring group 51 and a second conductive ring group 52 sleeved on the first rotating shaft 32 and the second rotating shaft 431, the first conductive ring group 51 and the second conductive ring group 52 being used to supply power to the second drive unit 432 and the airflow generating device 3, respectively.

[0050] Preferably, the first conductive ring group 51 can be used to power the second drive unit 432. The second conductive ring group 52 can be used to power the airflow generating device 3. In this application, to avoid the tangling of its electrical connection wires, the airflow generating device 3 during rotation is equipped with conductive ring groups on both the first rotating shaft 32 and the second rotating shaft 431. Conductive fibers or conductors form electrical contact with the rotating shafts, and current is discharged or powered through a plug-in method. The first conductive ring group 51 on the first rotating shaft 32 is used to power the second drive unit 432. The second conductive ring group 52 on the second rotating shaft 431 is used to power the airflow generating device 3. Since the first drive unit 322 is fixedly mounted on the device housing 1, it can be directly electrically connected to an external power supply.

[0051] The specific setup is as follows: The conductive ring assembly typically consists of a ring-shaped plastic support and embedded conductive fibers (such as carbon fiber), with the two ends of the conductive fibers protruding from the inside and outside of the support, respectively. During installation, the conductive ring assembly is directly fitted onto the rotating shafts (first rotating shaft 32 and second rotating shaft 431), with the sides of the conductive fibers contacting the shafts. The conductive ring assembly is fixed to the shafts by the elasticity or compression structure of the conductive fibers. For example, some conductive rings use an integral injection-molded structure, with the conductive fiber bundles evenly distributed within the support body. During installation, it is necessary to ensure the concentricity of the conductive ring assembly and the rotating shafts to avoid damage caused by forced fixing. For example, after the slip ring rotor is fitted onto the rotating shaft, it is initially positioned using fastening screws. The slip ring is rotated to adapt to the shaft rotation before being locked, while ensuring the direction of the wire exit.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0053] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0054] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0055] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linked," and "socketing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A self-dusting air filter device, characterized by The device comprises: a device housing, a filtering unit is arranged in the device housing, an air inlet and an air outlet are arranged on the device housing, the filtering unit is arranged between the air inlet and the air outlet, a side of the filtering unit facing the air inlet is formed as an air inlet side, and a side of the filtering unit facing the air outlet is formed as an air outlet side, wherein external air enters the device housing through the air inlet, sequentially passes through the air inlet side, the filtering unit and the air outlet side, and is discharged from the air outlet; an air flow generating device arranged in the device housing and located at the air outlet side of the filtering unit, the air flow generating device is provided with an air flow generating end and an air flow suction end, wherein the air flow generating end is arranged towards the filtering unit and can controllably generate high-pressure air flow; and a connecting unit arranged in the device housing and used for connecting the air flow generating device to the device housing. When the air flow generating device is in operation, the air flow generating end generates high-pressure air flow towards the filtering unit, the high-pressure air flow enters the filtering unit, an air flow pressure difference high point area is formed in the filtering unit, the remaining positions of the filtering unit form air flow pressure difference low point areas, and circulating air flow is generated between the air flow pressure difference high point area and the air flow pressure difference low point areas through the air inlet side and the air outlet side.

2. The self-dusting air cleaner of claim 1, wherein, The connecting unit is a first rotating mechanism, the first rotating mechanism comprises: a first rotating shaft, an axis of the first rotating shaft is arranged in a vertical direction, the first rotating shaft is rotatably connected to the device housing and the filtering unit; a first driving unit arranged on the device housing and connected to the first rotating shaft, used for driving the first rotating shaft to rotate; a linkage connecting component, one end of the linkage connecting component is connected to the first rotating shaft, and the other end of the linkage connecting component is fixed to the air flow generating device; and a power supply unit, part of the power supply unit is arranged on the first rotating shaft, used for supplying power to the air flow generating device. The first rotating shaft can drive the linkage connecting component to rotate simultaneously under the driving of the first driving unit, and the air flow generating device generates high-pressure air flow which can cover the air outlet side of the filtering unit during rotation under the driving of the linkage connecting component.

3. The self-dusting air cleaner of claim 2, wherein, The linkage connecting component comprises: a first rotating connecting piece, one end of the first rotating connecting piece is sleeved on the first rotating shaft; and a limiting combination unit, used for positioning the first rotating connecting piece on the first rotating shaft, the limiting combination unit comprises: a resilient abutting unit, the resilient abutting unit is sleeved on the first rotating shaft, and both ends of the resilient abutting unit are resiliently abutted on the first rotating connecting piece and a shaft shoulder of the first rotating shaft; a guide sliding groove, formed in an outer wall of the first rotating shaft in an axial direction; and a limiting sliding block, one end of the limiting sliding block passes through the first rotating connecting piece and is slidingly arranged in the guide sliding groove, and the other end of the limiting sliding block is fixed to the first rotating connecting piece.

4. The self-dusting air cleaner of claim 3, wherein, The first rotating mechanism further comprises a top end bearing arranged on the device housing and a bottom end bearing arranged on the filtering unit, both ends of the first rotating shaft are rotatably arranged in the top end bearing and the bottom end bearing, and the end of the first rotating shaft connected with the bottom end bearing is configured as a conical structure.

5. The self-dusting air cleaner of claim 2, wherein, The linkage connecting component comprises: a second rotating connecting member fixed at one end of the first rotating shaft; and a second rotating mechanism arranged at the other end of the second rotating connecting member, the second rotating mechanism comprising: a second rotating shaft with an axis arranged in a vertical direction, a first end of the second rotating shaft being rotatably connected to the second rotating connecting member; a second driving unit arranged on the second rotating connecting member and connected to the first end for driving the second rotating shaft to rotate; and a third rotating connecting member fixed at one end of the second rotating shaft for being driven by the second rotating shaft and simultaneously rotating, the airflow generating device being arranged on the third rotating connecting member; wherein the first rotating shaft and the second rotating shaft rotate simultaneously, and the high-pressure airflow generated by the airflow generating device can cover the air outlet side of the filtering unit during the simultaneous rotation of the first rotating shaft and the second rotating shaft.

6. The self-dusting air cleaner of claim 1, wherein, The control unit is further arranged, the airflow generating device is arranged as N, the control unit is electrically connected with N airflow generating devices, and the control unit is configured to individually control the airflow generating devices to generate forward or reverse airflow; when the control unit drives the airflow generating devices to generate forward airflow, the airflow generating end generates high-pressure airflow, and the airflow suction end inhales air; when the control unit drives the airflow generating devices to generate reverse airflow, the airflow suction end generates high-pressure airflow, and the airflow generating end inhales air.

7. The self-dusting air cleaner of claim 2, wherein, The control unit is further arranged, the linkage connecting component is arranged as N, N>1, N linkage connecting components are arranged along the outer wall of the first rotating shaft, the control unit is electrically connected with the airflow generating devices on the N linkage connecting components, and the control unit is configured to individually control the airflow generating devices to generate forward or reverse airflow; when the control unit drives the airflow generating devices to generate forward airflow, the airflow generating end generates high-pressure airflow, and the airflow suction end inhales air; when the control unit drives the airflow generating devices to generate reverse airflow, the airflow suction end generates high-pressure airflow, and the airflow generating end inhales air, and the control unit is used for individually controlling the airflow generating devices to generate airflow.

8. The self-dusting air cleaner of any one of claims 1-7, wherein, The airflow generating device comprises: an airflow channel, one side of the airflow channel being formed with the airflow generating end and the other side being formed with the airflow suction end; and a rotating driving device arranged in the airflow channel, the driving end of the rotating driving device being provided with rotating blades; wherein the rotating driving device is configured to drive the rotating blades to rotate forward and reverse, so that the airflow generating device can generate forward and reverse airflow.

9. The self-dusting air cleaner of any one of claims 2-4, wherein, The peripheral wall surface of the airflow generating end is configured as an inclined or arc-shaped wall surface, and the airflow generating end is configured as a strip-shaped nozzle arranged in parallel to the surface of the filter unit, wherein the high-pressure airflow sprayed by the strip-shaped nozzle can cover the air outlet side of the filter unit during rotation of the first rotating mechanism.

10. The self-dusting air cleaner of claim 5, wherein, The power supply unit comprises a first conductive ring set and a second conductive ring set sleeved on the first rotating shaft and the second rotating shaft, and the first conductive ring set and the second conductive ring set are respectively used for supplying power to the second driving unit and the airflow generating device.

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