Self-cleaning air purifier

Abstract

The invention discloses a self-cleaning type air purifier which comprises a shell, a filter cavity, an air inlet and a first air outlet are formed in the shell, the air inlet and the first air outlet can be communicated with the filter cavity, a filter element and a fan are arranged in the filter cavity, the filter cavity comprises a first cavity body and a second cavity body, a partition plate is arranged between the first cavity body and the second cavity body, and the first cavity body and the second cavity body are communicated through the partition plate. A partition plate is arranged in the first cavity, ventilation holes are formed in the partition plate in a penetrating mode, the filter element is annular and is arranged at the center of the first cavity, the air inlet is located in the first cavity, and a self-cleaning structure is arranged between the peripheral side of the filter element and the inner side wall of the first cavity; the self-cleaning structure comprises a movable frame and a driving component; wherein a plurality of connecting arms are uniformly distributed along the circumference of the movable frame at intervals, a brush capable of abutting against the outer side wall of the filter element is vertically arranged on one side of each connecting arm, a scraping plate is movably arranged on the movable frame, the scraping plate is arranged among the connecting arms in a matched and sleeved mode and can do reciprocating motion in the axial direction of the connecting arms, and a transmission component is arranged between the scraping plate and the movable frame.

Description

Technical Field

[0001] The present invention particularly relates to a self-cleaning air purifier. Background Art

[0002] In modern society, with the acceleration of industrialization and the increasing demand for indoor air quality, air purifiers have become widely used as important devices for improving indoor air quality. Existing air purifiers typically use filter cartridges to filter dust, particulate matter, and harmful gases from the air to achieve air purification. However, over long-term use, a large amount of pollutants gradually accumulate on the filter surface, causing the filter's filtration efficiency to decrease and even becoming a new source of pollution, affecting the normal operation of the air purifier. Therefore, how to effectively clean the filter cartridge to maintain the air purifier's purification effect and extend the filter's service life has become a pressing issue for those skilled in the art.

[0003] Currently, most self-cleaning air purifiers on the market use a cleaning device installed on the outside of the filter element to clean the filter. However, existing cleaning devices have problems such as incomplete cleaning and high energy consumption. This is especially true for households with cats, where cat hair often clogs the outside of the filter element, resulting in poor air filtration performance. Summary of the Invention

[0004] The present invention aims to solve one of the problems existing in the existing related technologies to at least a certain extent. To this end, the present invention provides a self-cleaning air purifier.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A self-cleaning air purifier comprises a housing, a filter chamber is provided in the housing, and an air inlet and a first air outlet respectively connectable to the filter chamber, a filter element and a fan are respectively provided in the filter chamber, the filter chamber comprises a first cavity and a second cavity, a partition is provided between the first cavity and the second cavity, a ventilation hole is formed through the partition, and the first cavity and the second cavity are connected to each other through the ventilation hole, the filter element has an annular shape and is provided at the center of the first cavity, the air inlet is located in the first cavity, an annular gap is formed between the outer peripheral side of the filter element and the inner wall of the first cavity, and a self-cleaning structure is provided in the annular gap;

[0007] The self-cleaning structure includes a movable frame which is coaxial with the filter element and rotatably arranged in an annular gap, and a driving component for driving the movable frame to reciprocate around the filter element; wherein, the movable frame is evenly spaced along the circumference with a plurality of connecting arms, and a brush which can abut against the outer wall of the filter element is vertically provided on one side of the connecting arm; a scraper is movably arranged 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 arm; a transmission component is provided between the scraper and the movable frame, and the transmission component is used to drive 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 arranged on one side of the movable frame and capable of moving back and forth laterally relative to the movable frame. A guide inclined groove is provided through one side of the movable frame. A first guide shaft is provided on one side of the scraper. The first guide shaft is movably arranged in the guide inclined groove. A first flange is provided on the inner side of the first cavity. The movable frame can be pressed 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 arranged in a second cavity, a driving shaft of the first motor is provided with a first gear, a first gear ring and a second gear are respectively rotatably provided in the second cavity, the first gear ring is meshed with the second gear, the first gear ring is meshed with the first gear, a third gear is provided on one side of the second gear on the same central axis, an eccentric shaft is provided on one side of the third gear, a second flange is provided along the circumferential side wall in the first cavity, an arc-shaped guide groove concentric with the filter element is opened through the second flange, a second guide shaft is provided on the movable frame, the second guide shaft is movably provided in the arc-shaped guide groove, and a connecting rod is hinged between the second guide shaft and the eccentric shaft.

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

[0011] The back-blowing device includes a wind tube located inside the filter element and capable of moving up and down, a lifting component for driving the wind tube to move up and down, and a flipping component for driving the fan to flip; wherein, the wind tube has an upper-opening air cavity, and a second air outlet facing the inside of the filter element is opened through one side of the air cavity, and the wind tube can be driven to move upward so that the upper opening of the air cavity covers the ventilation hole.

[0012] In one embodiment, a fixed shaft is provided at the lower end of the first cavity and at the inner center of the filter element, and 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 arranged at the telescopic end of the electric telescopic rod. A plurality of balls are movably embedded in the connecting block, and the plurality of balls abut against the lower side of the air duct. A second gear ring is provided at the upper end of the air duct and is arranged coaxially with the wind duct. The second gear ring can move up and down with the wind duct, causing the second gear ring to engage or disengage with the third gear.

[0013] In one embodiment, the air duct can be driven by the lifting component to move upward and be inserted into the ventilation hole, and a sealing ring is abutted between the air duct and the ventilation hole.

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

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

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is provided with a self-cleaning structure, including a rotating movable frame and a movable scraper, which can clean the filter element in all directions and at multiple angles; the movable frame reciprocates around the filter element, so that the brush can evenly contact the outer wall of the filter element, effectively removing dust and particulate matter on the surface of the filter element; the scraper moves upward relative to the movable frame as the movable frame rotates, and can promptly scrape off impurities swept by the brush, preventing the impurities from adhering to the filter element again, thereby improving the cleaning efficiency and effect;

[0018] And through the setting of the back-blowing device, the present invention can back-blow the filter element during the cleaning process, and then separate the impurities attached to the outside of the filter element, and then cooperate with the self-cleaning structure to scrape out the separation, and further remove the pollutants from the filter element; the wind tube moves up and down under the action of the lifting component. When the wind tube moves upward to cover the ventilation hole, the fan reversing component drives the fan to reverse, so that the airflow generated by the fan is sprayed to the inside of the filter element through the second air outlet of the wind tube, forming a back-blowing airflow, and blowing off the dust and particulate matter attached to the outside of the filter element from the inside to the outside of the filter element, thereby achieving deep cleaning of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0021] Figure 3 This is a cross-sectional view 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 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 It is a three-dimensional diagram of a self-cleaning air purifier in the present invention. DETAILED DESCRIPTION

[0026] The following detailed description provides various embodiments or examples for implementing the present invention. Of course, these are merely examples or embodiments and are not intended to be limiting. Furthermore, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. Such repetition is for simplicity and clarity in describing the present invention and does not imply a specific relationship between the different embodiments and / or configurations discussed.

[0027] like Figures 1 to 7 A self-cleaning air purifier shown in the figure comprises a shell 1, a filter chamber is provided in the shell 1, and an air inlet 2 and a first air outlet 3 which can be communicated with the filter chamber respectively, a filter element 99 and a fan 4 are respectively provided in the filter chamber, and is characterized in that: the filter chamber comprises a first cavity 5 and a second cavity 6, a partition 7 is provided between the first cavity 5 and the second cavity 6, a ventilation hole 8 is opened through the partition 7, and the first cavity 5 and the second cavity 6 are communicated with each other through the ventilation hole 8, the filter element 99 is annular in shape and is arranged at the center of the first cavity 5, the air inlet 2 is located in the first cavity 5, an annular gap 9 is formed between the outer peripheral side of the filter element 99 and the inner wall of the first cavity 5, and a self-cleaning structure is provided in the annular gap 9;

[0028] The self-cleaning structure includes a movable frame 10 that is coaxial with the filter element 99 and is rotatably arranged in the 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 evenly spaced along the circumference with a plurality of connecting arms 12, and a brush 13 that can abut against the outer wall of the filter element 99 is vertically provided on one side of the connecting arm 12, and a scraper 14 is movably arranged on the movable frame 10, and the scraper 14 is fitted and placed between the plurality of connecting arms 12 and can reciprocate along the axial direction of the connecting arm 12, and a transmission member 15 is provided between the scraper 14 and the movable frame 10, through which the scraper 14 is driven to move upward relative to the movable frame 10 as the movable frame 10 rotates.

[0029] Specifically, when the fan is started, the outside air enters the filter chamber from the air inlet, is filtered by the filter element and then blown out from the first air outlet, and impurities such as hair will be filtered and attached to the outer surface of the filter element. Then, the rotating movable frame and the movable scraper in the self-cleaning structure cooperate to clean the filter element in all directions and at multiple angles; the movable frame rotates back and forth around the filter element, so that the brush can evenly contact the outer wall of the filter element, effectively removing dust and particulate matter on the surface of the filter element; the scraper moves upward relative to the movable frame as the movable frame rotates, and can scrape off the impurities swept down by the brush in time to prevent the impurities from adhering to the filter element again, thereby improving the cleaning efficiency and effect. When the annular gap is full of impurities, the user can disassemble the shell for centralized cleaning.

[0030] Furthermore, the transmission member 15 includes a movable frame 16 arranged on one side of the movable frame 10 and capable of reciprocating laterally relative to the movable frame 10. A guide inclined groove 17 is provided on one side of the movable frame 16. A first guide shaft 18 is provided on one side of the scraper 14. The first guide shaft 18 is movably arranged in the guide inclined groove 17. A first flange 19 is provided on the inner side of 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 can move laterally relative to the movable frame 10. Specifically, third guide shafts 91 are respectively provided on the upper and lower sides of one side of the movable frame, and transverse guide grooves 92 are respectively passed through one side of the movable frame. The third guide shafts are movably arranged in the transverse guide grooves one by one to realize the transverse reciprocating movement of the movable frame relative to the movable frame; when the movable frame is driven to rotate, the movable frame rotates accordingly and presses against one side of the first flange, causing the movable frame to move laterally relative to the movable frame, and through the cooperation of the guide inclined groove and the first guide shaft, the scraper is driven to move upward along the axial direction of the connecting arm to scrape off impurities swept by the brush, and after the movable frame is separated from the first flange, the scraper automatically resets downward due to its own weight.

[0031] Furthermore, the driving member 11 includes a first motor 20 arranged in the second cavity 6, the driving shaft of the first motor 20 is provided with a first gear 21, and a first gear ring 22 and a second gear 23 are respectively rotatably provided in the second cavity 6, the first gear ring 22 is meshed with the second gear 23, the first gear ring 22 is meshed with the first gear 21, a third gear 24 is provided on one side of the second gear 23 as a coaxial axis, and an eccentric shaft 25 is provided on one side of the third gear 24, a second flange 98 is provided along the circumferential side wall in the first cavity 5, and an arc-shaped guide groove 26 concentric with the filter element 99 is opened through the second flange 98, and a second guide shaft 27 is provided on the movable frame 10, and the second guide shaft 27 is movably provided in the arc-shaped guide groove 26, and 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 driving component is first started to drive the first gear to rotate, and the third gear and the eccentric shaft are rotated through the transmission of the first gear ring and the second gear. 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 guide groove, and the brush located on the connecting arm in the movable frame 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 an air duct 31 located on the inner side of the filter element 99 and capable of moving up and down, and a lifting component 32 for driving the air duct 31 to move up and down, and a flipping component 33 for driving the fan 4 to flip over; wherein, the air duct 31 has an upper-opening air cavity 34, and a second air outlet 35 facing the inner side of the filter element 99 is opened on one side of the air cavity 34, and the air duct 31 can be driven to move upward so that the upper opening of the air cavity 34 covers the ventilation hole 8.

[0034] By setting up the back-blowing device, the present invention can back-blow the filter element during the cleaning process, thereby separating the impurities attached to the outside of the filter element, and then cooperating with the self-cleaning structure to scrape out and separate, further removing the pollutants from the filter element; the wind tube moves up and down under the action of the lifting component, and when the wind tube moves upward to cover the ventilation hole, the fan reversing component drives the fan to reverse, so that the airflow generated by the fan is sprayed to the inside of the filter element through the second air outlet of the wind tube, forming a back-blowing airflow, and blowing off the dust and particulate matter attached to the outside of the filter element from the inside to the outside of the filter element, thereby 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 inner center 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 arranged at the telescopic end of the electric telescopic rod 37. A plurality of balls 39 are movably embedded in the connecting block 38, and the plurality of balls 39 abut against the lower side of the air duct 31. A second gear ring 40 is provided at the upper end of the air duct 31 and is arranged coaxially with the wind duct 31. The second gear ring 40 can move up and down with the wind duct 31, causing the second gear ring 40 to engage or disengage with the third gear 24.

[0036] Specifically, during backflush cleaning, the lifting member is activated, causing the telescopic rod of the electric telescopic rod to extend and move upward. The ball bearing in the connecting block pushes the air duct upward along the fixed axis, and the upper opening of the air cavity engages and covers the ventilation hole. At this time, the second gear ring engages with the third gear. Simultaneously, the flip member is activated, and the second motor drives the rotating seat to rotate, causing the fan to flip, so that the airflow generated by the fan is ejected through the second air outlet of the air duct toward the inside of the filter element, forming a backflush airflow. The air cavity of the air duct can pressurize the airflow, increasing the wind force of the backflush airflow, thereby blowing away dust and particulate matter attached to the outside of the filter element from the inside out. The rotation of the third gear drives the air duct to rotate, so that the backflush airflow acts evenly on the inside of the filter element, improving the backflush cleaning effect.

[0037] After cleaning is completed, the electric telescopic rod 37 is retracted, the air cylinder 31 moves downward and resets, the second gear ring 40 is disengaged from the third gear 24, and the fan 4 is flipped and reset to resume normal air purification function.

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

[0039] Furthermore, the flip member 33 includes a rotating base 41 rotatably disposed within the second cavity 6, and a second motor 42 for driving the rotating base 41 to rotate. The fan 4 is disposed on the rotating base 41. Specifically, when the flip member is activated, the second motor drives the rotating base to rotate, and the fan flips, so that the airflow generated by the fan is ejected into the inner side of the filter element through the second air outlet of the air cylinder, forming a backflow airflow.

[0040] Furthermore, the housing 1 is evenly spaced along its circumference with a plurality of grille bars 43, and the air inlet 2 is formed between the grille bars 43. The cross-sectional shape of the grille bars 43 is arc-shaped. The grille bars, evenly spaced along the circumference of the housing, form the air inlet. The arc-shaped cross-sectional shape of the grille bars effectively guides air into the filter cavity, reduces intake resistance, and improves the air intake efficiency of the air purifier. During backwash cleaning, the grille bars effectively intercept cleaned hair impurities, preventing them from being blown out of the air inlet by the backwash airflow.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above in conjunction with the accompanying drawings. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention as claimed. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning air purifier, comprising a housing (1), wherein the housing (1) is provided with a filter chamber, an air inlet (2) and a first air outlet (3) respectively connected to the filter chamber, a filter element (99) and a fan (4) respectively provided in the filter chamber, characterized in that: The filter cavity comprises a first cavity (5) and a second cavity (6); a partition (7) is provided between the first cavity (5) and the second cavity (6); a ventilation hole (8) is provided through the partition (7); the first cavity (5) and the second cavity (6) are communicated with each other through the ventilation hole (8); the filter element (99) is annular in shape and is arranged at the center of the first cavity (5); the air inlet (2) is located in the first cavity (5); an annular gap (9) is formed between the outer peripheral side of the filter element (99) and the inner wall of the first cavity (5); a self-cleaning structure is provided in the annular gap (9); The self-cleaning structure comprises a movable frame (10) which is coaxial with the filter element (99) and is rotatably arranged in the 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 evenly spaced along the circumference with a plurality of connecting arms (12); a brush (13) which can abut against the outer wall of the filter element (99) is vertically provided on one side of the connecting arm (12); a scraper (14) is movably arranged on the movable frame (10); the scraper (14) is fitted between the plurality of connecting arms (12) and can reciprocate along the axial direction of the connecting arm (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.

2. A self-cleaning air purifier according to claim 1, characterized in that: The transmission component (15) includes a movable frame (16) arranged on one side of the movable frame (10) and capable of making transverse reciprocating movements relative to the movable frame (10). A guide inclined groove (17) is provided through one side of the movable frame (16). A first guide shaft (18) is provided on one side of the scraper (14). The first guide shaft (18) is movably arranged in the guide inclined groove (17). A first flange (19) is provided on the inner side of 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) can make transverse movements relative to the movable frame (10).

3. The self-cleaning air purifier according to claim 1, characterized in that: The driving member (11) includes a first motor (20) arranged in a second cavity (6), a driving shaft of the first motor (20) is provided with a first gear (21), a first gear ring (22) and a second gear (23) are respectively rotatably provided in the second cavity (6), the first gear ring (22) is meshed with the second gear (23), the first gear ring (22) is meshed with the first gear (21), and a third gear is provided on one side of the second gear (23) in a coaxial manner. gear (24), an eccentric shaft (25) is provided on one side of the third gear (24), a second flange (98) is provided along the circumferential side wall in the first cavity (5), an arc-shaped guide groove (26) is provided through the second flange (98) and is concentric with the filter element (99), a second guide shaft (27) is provided on the movable frame (10), the second guide shaft (27) is movably arranged in the arc-shaped guide groove (26), and a connecting rod (28) is hinged between the second guide shaft (27) and the eccentric shaft (25).

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

5. The self-cleaning air purifier according to claim 4, characterized in that: A fixed shaft (36) is provided at the lower end of the first cavity (5) and at the inner center of the filter element (99). The wind tube (31) is movably sleeved on the fixed shaft (36). The wind tube (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) arranged at the telescopic end of the electric telescopic rod (37). A plurality of balls (39) are movably embedded in the connecting block (38). The plurality of balls (39) abut against the lower side of the wind tube (31). A second gear ring (40) is provided at the upper end of the wind tube (31) and is arranged coaxially with the wind tube (31). The second gear ring (40) can move up and down with the wind tube (31), causing the second gear ring (40) to engage with or disengage from the third gear (24).

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

7. The self-cleaning air purifier according to claim 4, characterized in that: The turning member (33) comprises a rotating seat (41) rotatably arranged in the second cavity (6), and a second motor (42) for driving the rotating seat (41) to rotate, and the fan (4) is arranged on the rotating seat (41).

8. The self-cleaning air purifier according to claim 1, characterized in that: The shell (1) is evenly spaced along the circumference with a plurality of grille bars (43); the air inlet (2) is formed between the plurality of grille bars (43); and the cross-sectional shape of the grille bars (43) is arranged in an arc shape.

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