Self-cleaning air purifier

Abstract

This invention discloses a self-cleaning air purifier, comprising a housing, a filter chamber inside the housing, and an air inlet and a first air outlet respectively communicating with the filter chamber. A filter element and a fan are respectively disposed within the filter chamber. The filter chamber includes a first cavity and a second cavity, with a partition between the first and second cavities. A ventilation hole is provided through the partition. The filter element is annular in shape and located at the center of the first cavity. The air inlet is located within the first cavity. A self-cleaning structure is provided between the outer periphery of the filter element and the inner wall of the first cavity. The self-cleaning structure includes a movable frame and a driving component. The movable frame has several connecting arms evenly distributed around its circumference. One side of each connecting arm has a vertically arranged brush that abuts against the outer wall of the filter element. A scraper is movably disposed on the movable frame, fitted between the connecting arms and capable of reciprocating along the axial direction of the connecting arms. A transmission component is provided between the scraper and the movable frame.

Description

Technical Field

[0001] This invention specifically relates to a self-cleaning air purifier. Background Technology

[0002] In modern society, with the acceleration of industrialization and the increasing demands for indoor air quality, air purifiers have become widely used as essential devices for improving indoor air quality. Existing air purifiers typically use filters to remove dust, particulate matter, and harmful gases from the air. However, over long-term use, a large amount of pollutants gradually accumulates on the surface of the filter, leading to a decrease in filtration efficiency and even becoming a new source of pollution, thus affecting the normal operation of the air purifier. Therefore, how to effectively clean the filter to maintain the purification effect of the air purifier and extend its service life has become a problem that urgently needs to be solved by those skilled in the art.

[0003] Currently, most self-cleaning air purifiers on the market clean their filters by installing a cleaning device on the outside of the filter. However, existing cleaning devices suffer from problems such as incomplete cleaning and high energy consumption. This is especially problematic in households with cats, where cat hair often clogs the outside of the filter, resulting in poor air filtration. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a self-cleaning air purifier.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A self-cleaning air purifier includes a housing, a filter chamber inside the housing, and an air inlet and a first air outlet that are respectively connected to the filter chamber. A filter element and a fan are respectively disposed in the filter chamber. The filter chamber includes a first cavity and a second cavity, and a partition is provided between the first cavity and the second cavity. A ventilation hole is provided through the partition to allow the first cavity and the second cavity to communicate with each other. The filter element is annular in shape and is located at the center of the first cavity. The air inlet is located in the first cavity. An annular gap is formed between the outer periphery of the filter element and the inner wall of the first cavity. A self-cleaning structure is provided in the annular gap.

[0007] The self-cleaning structure includes a movable frame coaxial with the filter element and rotatably disposed within an annular gap, and a driving component for driving the movable frame to reciprocate around the filter element; wherein, the movable frame has a plurality of connecting arms evenly distributed around its circumference, and one side of each connecting arm is provided with a brush that can abut against the outer wall of the filter element. A scraper is movably disposed on the movable frame, and the scraper is fitted between the plurality of connecting arms and can reciprocate along the axial direction of the connecting arms. A transmission component is provided between the scraper and the movable frame, and the transmission component drives the scraper to move upward relative to the movable frame as the movable frame rotates.

[0008] In one embodiment, the transmission component includes a movable frame disposed on one side of the movable frame and capable of reciprocating laterally relative to it. A guide groove is provided through one side of the movable frame, and a first guide shaft is provided on one side of the scraper. The first guide shaft is movably disposed in the guide groove. A first flange is provided inside the first cavity. The movable frame can press against one side of the first flange as the movable frame rotates, so that the movable frame moves laterally relative to the movable frame.

[0009] In one embodiment, the driving component includes a first motor disposed in a second cavity, a first gear disposed on the drive shaft of the first motor, a first gear ring and a second gear rotatably disposed in the second cavity, the first gear ring meshing with the second gear, a third gear disposed coaxially on one side of the second gear, an eccentric shaft disposed on one side of the third gear, a second flange disposed along the circumferential sidewall of the first cavity, an arc-shaped guide groove coaxial with the filter element being opened through the second flange, a second guide shaft disposed on the movable frame, the second guide shaft being movably disposed in the arc-shaped guide groove, and a connecting rod hinged between the second guide shaft and the eccentric shaft.

[0010] In one embodiment, the self-cleaning structure further includes a back-blowing device;

[0011] The back-blowing device includes a duct located inside the filter element and movable up and down, a lifting component for driving the duct to move up and down, and a flipping component for driving the fan to flip; wherein, the duct has an upward-opening air cavity, and a second air outlet is provided through one side of the air cavity facing the inside of the filter element, and the duct can be driven to move upward, causing the air cavity to open and cover the ventilation hole.

[0012] In one embodiment, a fixed shaft is provided at the lower end of the first cavity and at the center of the inner side of the filter element. The air duct is movably sleeved on the fixed shaft. The air duct can rotate around the fixed shaft and can move axially along the fixed shaft. The lifting component includes an electric telescopic rod and a connecting block provided at the telescopic end of the electric telescopic rod. A plurality of balls are movably embedded on the connecting block. The plurality of balls abut against the lower side of the air duct. A second toothed ring is provided at the upper end of the air duct and is arranged coaxially with it. The second toothed ring can move up and down with the air duct, causing the second toothed ring to mesh with or disengage from the third gear.

[0013] In one embodiment, the air duct can be driven upward by a lifting member to fit into a ventilation hole, and a sealing ring is abutting between the air duct and the ventilation hole.

[0014] In one embodiment, the flipping member includes a rotating seat rotatably disposed in the second cavity, and a second motor for driving the rotating seat to rotate, wherein the fan is disposed on the rotating seat.

[0015] In one embodiment, the housing is provided with a plurality of grille bars evenly spaced along the circumference, the air inlet is formed between the plurality of grille bars, and the cross-sectional shape of the grille bars is arc-shaped.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention features a self-cleaning structure, including a rotating frame and a movable scraper, enabling comprehensive and multi-angle cleaning of the filter element. The rotating frame reciprocates around the filter element, allowing the brush to evenly contact the outer wall of the filter element, effectively removing dust and particles from its surface. The scraper moves upward relative to the rotating frame, promptly removing impurities swept off by the brush and preventing them from re-adhering to the filter element, thus improving cleaning efficiency and effectiveness.

[0018] Furthermore, the back-blowing device enables the filter element to be back-blown during the cleaning process, thereby separating impurities attached to the outside of the filter element. Combined with the self-cleaning structure, the separation is scraped off, further removing contaminants from the filter element. The air duct moves up and down under the action of the lifting component. When the air duct moves upward to cover the ventilation holes, the fan reversing component drives the fan to reverse, so that the airflow generated by the fan is sprayed into the inside of the filter element through the second air outlet of the air duct, forming a back-blowing airflow that blows off the dust and particles attached to the outside of the filter element from the inside out, achieving deep cleaning of the filter element. Attached Figure Description

[0019] Figure 1 This is one of the exploded views of a self-cleaning air purifier according to the present invention;

[0020] Figure 2This is a second exploded view of a self-cleaning air purifier according to the present invention;

[0021] Figure 3 This is one of the cross-sectional views of a self-cleaning air purifier according to the present invention;

[0022] Figure 4 This is a second cross-sectional view of a self-cleaning air purifier according to the present invention;

[0023] Figure 5 This is an exploded view of a self-cleaning air purifier according to the present invention;

[0024] Figure 6 This is a third cross-sectional view of a self-cleaning air purifier according to the present invention;

[0025] Figure 7 This is a perspective view of a self-cleaning air purifier according to the present invention. Detailed Implementation

[0026] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0027] like Figures 1 to 7 A self-cleaning air purifier is shown, comprising a housing 1, a filter chamber inside the housing 1, and an air inlet 2 and a first air outlet 3 that are respectively connected to the filter chamber. A filter element 99 and a fan 4 are respectively provided inside the filter chamber. The filter chamber comprises a first cavity 5 and a second cavity 6, with a partition 7 between the first cavity 5 and the second cavity 6. A ventilation hole 8 is provided through the partition 7 to allow communication between the first cavity 5 and the second cavity 6. The filter element 99 is annular in shape and located at the center of the first cavity 5. The air inlet 2 is located inside the first cavity 5. An annular gap 9 is formed between the outer periphery of the filter element 99 and the inner wall of the first cavity 5, and a self-cleaning structure is provided within the annular gap 9.

[0028] The self-cleaning structure includes a movable frame 10 coaxial with the filter element 99 and rotatably disposed within an annular gap 9, and a driving member 11 for driving the movable frame 10 to reciprocate around the filter element 99; wherein, the movable frame 10 is provided with a plurality of connecting arms 12 evenly distributed around its circumference, and one side of each connecting arm 12 is provided with a brush 13 that can abut against the outer wall of the filter element 99. A scraper 14 is movably disposed on the movable frame 10, and the scraper 14 is fitted between the plurality of connecting arms 12 and can reciprocate along the axial direction of the connecting arms 12. A transmission member 15 is provided between the scraper 14 and the movable frame 10, and the transmission member 15 drives the scraper 14 to move upward relative to the movable frame 10 as the movable frame 10 rotates.

[0029] Specifically, when the fan starts, outside air enters the filter chamber through the air inlet, is filtered by the filter element, and is blown out through the first air outlet. Hair and other impurities adhere to the outer surface of the filter element. The self-cleaning structure, with its rotating movable frame and movable scraper, can clean the filter element from all directions and angles. The movable frame reciprocates around the filter element, allowing the brush to evenly contact the outer wall of the filter element, effectively removing dust and particles from the filter element surface. The scraper moves upward relative to the movable frame as it rotates, promptly scraping away the impurities swept off by the brush, preventing impurities from re-adhering to the filter element, thus improving cleaning efficiency and effectiveness. When the annular gap is full of impurities, the user can disassemble the housing for centralized cleaning.

[0030] Furthermore, the transmission component 15 includes a movable frame 16 disposed on one side of the movable frame 10 and capable of reciprocating laterally relative to it. A guide groove 17 is provided through one side of the movable frame 16, and a first guide shaft 18 is provided on one side of the scraper 14. The first guide shaft 18 is movably disposed in the guide groove 17. A first flange 19 is provided inside the first cavity 5. The movable frame 16 can rotate with the movable frame 10 and press against one side of the first flange 19, so that the movable frame 16 moves laterally relative to the movable frame 10. Specifically, the movable frame is provided with a third guide shaft 91 on one side, and a transverse guide groove 92 is provided on one side of the movable frame. The third guide shaft is movably installed in the transverse guide groove, so as to realize the transverse back-and-forth movement of the movable frame relative to the movable frame. When the movable frame is driven to rotate, the movable frame rotates and presses against one side of the first flange, causing the movable frame to move laterally relative to the movable frame. Through the cooperation of the guide groove and the first guide shaft, the scraper is driven to move upward along the connecting arm axis to scrape off the impurities swept down by the brush. After the movable frame is separated from the first flange, the scraper automatically resets downward due to its own weight.

[0031] Furthermore, the driving component 11 includes a first motor 20 disposed in the second cavity 6. The drive shaft of the first motor 20 is provided with a first gear 21. A first gear ring 22 and a second gear 23 are rotatably disposed in the second cavity 6. The first gear ring 22 meshes with the second gear 23 and the first gear ring 22 meshes with the first gear 21. A third gear 24 is disposed on one side of the second gear 23 along a central axis. An eccentric shaft 25 is provided on one side of the third gear 24. A second flange 98 is provided along the circumferential sidewall in the first cavity 5. An arc-shaped guide groove 26 concentric with the filter element 99 is opened through the second flange 98. A second guide shaft 27 is provided on the movable frame 10. The second guide shaft 27 is movably disposed in the arc-shaped guide groove 26. A connecting rod 28 is hinged between the second guide shaft 27 and the eccentric shaft 25.

[0032] Specifically, when the filter element needs to be cleaned, the first motor in the drive component is started to drive the first gear to rotate. Through the transmission of the first gear ring and the second gear, the third gear and the eccentric shaft rotate. The eccentric shaft is driven by the connecting rod, so that the second guide shaft drives the movable frame to reciprocate around the filter element along the arc-shaped guide groove. The brush located in the connecting arm of the movable frame then cleans the outer wall of the filter element.

[0033] Furthermore, the self-cleaning structure also includes a back-blowing device; the back-blowing device includes a wind duct 31 located inside the filter element 99 and capable of moving up and down, a lifting member 32 for driving the wind duct 31 to move up and down, and a flipping member 33 for driving the fan 4 to flip; wherein, the wind duct 31 has an upward-opening air cavity 34, and a second air outlet 35 is provided through one side of the air cavity 34 facing the inside of the filter element 99, and the wind duct 31 can be driven to move upward, causing the air cavity 34 to open and cover the ventilation hole 8.

[0034] By using a back-blowing device, this invention enables the filter element to be back-blown during the cleaning process, thereby separating impurities attached to the outside of the filter element. Combined with the self-cleaning structure, this scrapes off the impurities, further removing contaminants from the filter element. The air duct moves up and down under the action of the lifting component. When the air duct moves upward to cover the ventilation holes, the fan reversing component drives the fan to reverse, causing the airflow generated by the fan to be sprayed into the inside of the filter element through the second air outlet of the air duct, forming a back-blowing airflow. This blows off the dust and particles attached to the outside of the filter element from the inside out, achieving deep cleaning of the filter element.

[0035] Furthermore, a fixed shaft 36 is provided at the lower end of the first cavity 5 and at the center of the inner side of the filter element 99. The air duct 31 is movably sleeved on the fixed shaft 36. The air duct 31 can rotate around the fixed shaft 36 and can move axially along the fixed shaft 36. The lifting member 32 includes an electric telescopic rod 37 and a connecting block 38 provided at the telescopic end of the electric telescopic rod 37. A plurality of balls 39 are movably embedded on the connecting block 38. The plurality of balls 39 abut against the lower side of the air duct 31. A second toothed ring 40 is provided at the upper end of the air duct 31 and is arranged with the same central axis as it. The second toothed ring 40 can move up and down with the air duct 31, causing the second toothed ring 40 to mesh with or disengage from the third gear 24.

[0036] Specifically, during backflushing cleaning, the lifting mechanism is activated, and the telescopic rod of the electric telescopic rod extends upward, pushing the air duct upward along a fixed axis through the ball bearings in the connecting block. The opening on the air chamber is fitted and covered with the ventilation hole, and at this time, the second gear ring meshes with the third gear. Simultaneously, the tilting mechanism is activated, and the second motor drives the rotating seat to rotate, causing the fan to tilt. This allows the airflow generated by the fan to be sprayed into the inside of the filter element through the second air outlet of the air duct, forming a backflushing airflow. The airflow is pressurized through the air chamber of the air duct, increasing the force of the backflushing airflow. As a result, dust and particles adhering to the outside of the filter element are blown off from the inside out. When the third gear rotates, it drives the air duct to rotate, ensuring that the backflushing airflow acts evenly on the inside of the filter element, improving the backflushing cleaning effect.

[0037] After cleaning, the electric telescopic rod 37 retracts, the air duct 31 moves downward to reset, the second gear ring 40 disengages from the third gear 24, the fan 4 flips to reset, and the normal air purification function is restored.

[0038] Furthermore, the air duct 31 can be driven upward by the lifting member 32 to be inserted into the ventilation hole 8, and a sealing ring is abutting between the air duct 31 and the ventilation hole 8.

[0039] Furthermore, the flipping component 33 includes a rotating seat 41 rotatably disposed within the second cavity 6, and a second motor 42 for driving the rotating seat 41 to rotate. The fan 4 is disposed on the rotating seat 41. Specifically, when the flipping component is activated, the second motor drives the rotating seat to rotate, and the fan flips, causing the airflow generated by the fan to be sprayed into the inside of the filter element through the second air outlet of the air duct, forming a backflushing airflow.

[0040] Furthermore, the housing 1 is provided with a plurality of grid baffles 43 evenly spaced along its circumference, and the air inlet 2 is formed between the grid baffles 43, with the cross-sectional shape of the grid baffles 43 being arc-shaped. The plurality of grid baffles evenly spaced along the circumference of the housing form the air inlet, and the arc-shaped cross-sectional shape of the grid baffles can effectively guide air into the filter chamber, reduce air intake resistance, improve the air intake efficiency of the air purifier, and effectively intercept the air during backflushing cleaning, preventing hair and impurities after cleaning from being directly blown out of the air inlet by the backflushing airflow.

[0041] Based on the accompanying drawings and the foregoing illustrations and descriptions, the basic principles and main features of the present invention, as well as its advantages, those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning air purifier, comprising a housing (1), wherein a filter chamber is provided inside the housing (1), and an air inlet (2) and a first air outlet (3) respectively communicating with the filter chamber, and a filter element (99) and a fan (4) are respectively provided inside the filter chamber, characterized in that: The filter chamber includes a first chamber (5) and a second chamber (6). A partition (7) is provided between the first chamber (5) and the second chamber (6). A ventilation hole (8) is provided through the partition (7) to allow the first chamber (5) and the second chamber (6) to communicate with each other. The filter element (99) is annular in shape and is located at the center of the first chamber (5). The air inlet (2) is located inside the first chamber (5). The outer periphery of the filter element (99) is flush with the inner wall of the first chamber (5). An annular gap (9) is formed between the filter elements (99), and a self-cleaning structure is provided within the annular gap (9). The self-cleaning structure includes a movable frame (10) that is coaxial with the filter element (99) and rotatably disposed within the annular gap (9), and a driving component (11) for driving the movable frame (10) to reciprocate around the filter element (99). The movable frame (10) is provided with a plurality of connecting arms (12) evenly distributed along the circumference, and one side of each connecting arm (12) is provided with a brush (1) that can abut against the outer wall of the filter element (99). 3) A scraper (14) is movably mounted on the movable frame (10). The scraper (14) is fitted between several connecting arms (12) and can reciprocate along the axial direction of the connecting arms (12). A transmission component (15) is provided between the scraper (14) and the movable frame (10). The transmission component (15) drives the scraper (14) to move upward relative to the movable frame (10) as the movable frame (10) rotates. The transmission component (15) includes components disposed on one side of the movable frame (10) that can... The movable frame (16) that moves laterally back and forth has a guide groove (17) through one side, and a first guide shaft (18) on one side of the scraper (14). The first guide shaft (18) is movably disposed in the guide groove (17). A first flange (19) is provided inside the first cavity (5). The movable frame (16) can press against one side of the first flange (19) as the movable frame (10) rotates, so that the movable frame (16) moves laterally relative to the movable frame (10).

2. The self-cleaning air purifier according to claim 1, characterized in that: The driving component (11) includes a first motor (20) disposed in the second cavity (6). The drive shaft of the first motor (20) is provided with a first gear (21). A first gear ring (22) and a second gear (23) are rotatably disposed in the second cavity (6). The first gear ring (22) meshes with the second gear (23). The first gear ring (22) meshes with the first gear (21). A third gear is disposed on one side of the second gear (23) along the same central axis. The gear (24) has an eccentric shaft (25) on one side of the third gear (24). The first cavity (5) has a second flange (98) along the circumferential sidewall. The second flange (98) has an arc-shaped guide groove (26) with the same center as the filter element (99) through it. The movable frame (10) has a second guide shaft (27). The second guide shaft (27) is movably disposed in the arc-shaped guide groove (26). A connecting rod (28) is hinged between the second guide shaft (27) and the eccentric shaft (25).

3. A self-cleaning air purifier according to claim 2, characterized in that: The self-cleaning structure also includes a back-blowing device; the back-blowing device includes a wind duct (31) located inside the filter element (99) and movable up and down, a lifting member (32) for driving the wind duct (31) to move up and down, and a flipping member (33) for driving the fan (4) to flip; wherein, the wind duct (31) has an air cavity (34) with an upper opening, and a second air outlet (35) is provided through one side of the air cavity (34) facing the inside of the filter element (99), and the wind duct (31) can be driven to move upward so that the air cavity (34) opens to cover the ventilation hole (8).

4. A self-cleaning air purifier according to claim 3, characterized in that: A fixed shaft (36) is provided at the lower end of the first cavity (5) and at the center of the inner side of the filter element (99). The air duct (31) is movably sleeved on the fixed shaft (36). The air duct (31) can rotate around the fixed shaft (36) and can move axially along the fixed shaft (36). The lifting component (32) includes an electric telescopic rod (37) and a connecting block (38) provided at the telescopic end of the electric telescopic rod (37). A number of balls (39) are movably embedded on the connecting block (38). The balls (39) abut against the lower side of the air duct (31). A second toothed ring (40) is provided at the upper end of the air duct (31) and is arranged with the same central axis as it. The second toothed ring (40) can move up and down with the air duct (31), causing the second toothed ring (40) to mesh or disengage with the third gear (24).

5. A self-cleaning air purifier according to claim 4, characterized in that: The air duct (31) can be driven upward by the lifting component (32) to be inserted into the ventilation hole (8), and a sealing ring is abutting between the air duct (31) and the ventilation hole (8).

6. A self-cleaning air purifier according to claim 3, characterized in that: The flipping component (33) includes a rotating seat (41) rotatably disposed in the second cavity (6) and a second motor (42) for driving the rotating seat (41) to rotate. The fan (4) is disposed on the rotating seat (41).

7. A self-cleaning air purifier according to claim 1, characterized in that: The housing (1) has a number of grid strips (43) evenly distributed around the circumference, and the air inlet (2) is formed between the grid strips (43), and the cross-sectional shape of the grid strips (43) is arc-shaped.

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