Filter screen self-cleaning indoor air purifier

Abstract

The invention relates to the technical field of air filtration, in particular to an indoor air purifier with a self-cleaning filter screen. Comprising a base and a filter cartridge on the upper surface of the base, the upper port of the filter cartridge is fixedly connected with a top seat with an air outlet hole; the air outlet hole is communicated with the inner side of the filter cartridge; the inner wall of the air outlet hole is fixedly connected with a fan; the upper end opening of the air outlet hole is fixedly connected with a protective net; the outer diameters of the top seat and the base are greater than the outer diameter of the filter cartridge; the outer side of the filter cartridge is sleeved with a protective cover with air holes; a spiral plate is movably connected between the inner side of the protective cover and the outer side of the filter cartridge; the inner edge of the spiral plate is in contact with the outer wall of the filter cartridge; a collecting tank is arranged in the base; according to the air purifier, the spiral plate rotates on the outer wall of the filter cartridge, so that dust and fibers formed after filtration on the outer wall of the filter cartridge are rotated away by the rotating spiral plate, the cleanness of the filter cartridge is ensured, and the filtering and purifying effect of the air purifier on surrounding air is improved.

Description

Technical Field

[0001] The invention relates to the technical field of air filtration, in particular to a filter net self-cleaning indoor air purifier. Background Art

[0002] In processing factories such as textiles, building materials, metallurgy, and chemicals, there is a lot of dust and fiber dust in the air in the workshop. Workers working in the workshop are prone to illness when they inhale dusty air. Long-term work in such an environment is extremely detrimental to human health. Therefore, some air filtration equipment is gradually used in factory workshops to improve the air in the workshop, especially in the surrounding environment of workpiece processing. The air filtration equipment sucks the dust or fiber in the air into the air filtration equipment along with the air, and the gas passes through the filter net in the air filtration equipment and is discharged, while the dust or fiber in the air is intercepted by the filter net and retained in the air filtration equipment.

[0003] In order to ensure the filtering effect and efficiency of the filter in the air filtering equipment, some cleaning structures such as brushes and straight scrapers are generally provided to clean the outer surface of the filter in the air filtering equipment. During the cleaning process of the dust or fibers on the surface of the filter in the air filtering equipment, the air filtering equipment does not stop running. Therefore, in the existing cleaning structure, during the cleaning process of the dust or fibers on the outer surface of the filter, the dust and fibers on the outer surface of the filter are affected by the suction force of the inner side of the filter, making it difficult for the dust and fibers to be scraped off the surface of the filter, resulting in low efficiency in cleaning the dust and fibers on the surface of the filter, thereby affecting the air purification effect of the air filtering equipment on the workshop.

[0004] In view of this, in order to overcome the above technical problems, the present invention proposes a filter self-cleaning indoor air purifier to solve the above technical problems. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art, the present invention proposes a self-cleaning indoor air purifier with a filter mesh. The present invention rotates a spiral plate on the outer wall of the filter cartridge, so that the dust and fibers formed after filtering on the outer wall of the filter cartridge are rotated away by the rotating spiral plate, thereby ensuring the cleanliness of the filter cartridge and further improving the filtering and purification effect of the air purifier on the surrounding air.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a filter self-cleaning indoor air purifier described in the present invention comprises a base and a filter cartridge on the upper surface of the base; the upper end port of the filter cartridge is fixedly connected to a top seat with an air outlet; the air outlet is connected to the inner side of the filter cartridge; the inner wall of the air outlet is fixedly connected to a fan; the upper end port of the air outlet is fixedly connected to a protective net; the outer diameters of the top seat and the base are larger than the outer diameter of the filter cartridge; a protective cover with air holes is sleeved on the outer side of the filter cartridge; a spiral plate is movably connected between the inner side of the protective cover and the outer side of the filter cartridge; the inner edge of the spiral plate is in contact with the outer wall of the filter cartridge; a collecting groove is arranged inside the base; a clean gap is formed between the outer side of the filter cartridge and the inner side of the protective cover; the collecting groove is connected to the clean gap through an annular groove; the spiral plate spirally scrapes impurities on the outer wall of the filter cartridge into the collecting groove when rotating.

[0007] Preferably, the second motor is embedded in the upper groove wall of the collecting groove; the output shaft of the second motor is fixedly connected to the lower end of the spiral plate through a connecting rod; the upper end of the spiral plate is close to the upper end of the filter cartridge; the lower end of the spiral plate extends into the collecting groove; the collecting groove and the outer wall of the base are connected to the replacement groove; the replacement box is movably connected in the replacement groove; the opening of the replacement box faces upward.

[0008] Preferably, the upper end of the spiral plate contacts the lower surface of the top seat; the spiral plate is elastic; the position where the lower surface of the top seat contacts the upper end of the spiral plate is configured to be corrugated; and fluctuations are formed during the contact between the upper end of the spiral plate and the lower surface of the top seat.

[0009] Preferably, the fan is composed of a first motor and fan blades; the first motor is a double-headed motor; one of the output shafts of the first motor is fixedly connected to the fan blades, and the other output shaft is fixedly connected to the screw; the thread of the screw is bidirectional; the outer wall of the screw is threadedly connected to the baffle plate; the outer wall of the baffle plate is in active sealing contact with the inner wall of the filter cartridge; the inner wall of the filter cartridge is fixedly connected to a sliding bar along the axial direction; the sliding bar passes through the outer wall of the baffle plate and is slidingly and sealingly connected to the baffle plate.

[0010] Preferably, the upper limit position of the baffle is not higher than the upper end of the filter cartridge; the baffle moves up and down along the slide bar during the rotation of the screw.

[0011] Preferably, a one-way valve is provided through the upper and lower parts of the baffle plate; the gas above the baffle plate can pass through the one-way valve and enter below the baffle plate.

[0012] Preferably, the air vent on the protective cover is hinged to the mesh disk through a hinge block near the opening of the filter cartridge; holes are arranged on the mesh disk; a slot is arranged near the opening of the air vent near the opening of the filter cartridge; the slot is arranged away from the hinge block; a block is arranged in the slot; the block is fixedly connected to the mesh disk; the mesh disk can be opened toward the inside of the protective cover.

[0013] Preferably, the hinge block is arranged close to the top seat; the side of the mesh plate close to the filter cartridge is adapted to the inner wall of the protective cover; the inner wall of the protective cover is arranged in contact with the outer edge of the spiral plate.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention rotates the spiral plate on the outer wall of the filter cartridge so that the dust and fibers formed on the outer wall of the filter cartridge after filtering are removed by the rotating spiral plate, thereby ensuring the cleanliness of the filter cartridge and further improving the filtering and purification effect of the air purifier on the surrounding air.

[0016] 2. The present invention enables the baffle plate to move back and forth up and down on the inner side of the filter cartridge, so that the non-working part of the filter cartridge can be recoiled during the downward movement of the baffle plate, so that the holes on the filter cartridge can be further unblocked, the filtering effect of the filter cartridge is improved, and the air filtering efficiency is also improved.

[0017] 3. The present invention unidirectionally hinges the mesh plate through the air vents close to the orifices of the filter cartridge, thereby making it difficult for dust or fibers on the outer wall of the filter cartridge to pass through the air vents and be scattered under the backwash of the air flow, thereby ensuring the dredging effect of the filter cartridge while further improving the collection effect of dust or fibers, and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0019] Figure 1 is a stereogram of the present invention;

[0020] Figure 2 yes Figure 1 A cross-sectional view of

[0021] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0022] Figure 4 It is a three-dimensional diagram of the baffle plate and the screw rod in the present invention;

[0023] Figure 5 It is a schematic diagram of the contact between the lower surface of the top plate and the upper end of the spiral plate in the present invention;

[0024] Figure 6 is a three-dimensional diagram of the base in the present invention;

[0025] Figure 7 It is a three-dimensional diagram of the protective cover in the present invention.

[0026] In the figure: base 1, collecting tank 11, annular groove 12, second motor 13, connecting rod 14, replacement groove 15, replacement box 16, filter cartridge 2, cleaning gap 21, top seat 3, air outlet 31, protective net 32, fan 4, first motor 41, fan blades 42, screw 43, baffle plate 44, slide bar 45, one-way valve 46, protective cover 5, air vent 51, spiral plate 52, slot 53, mesh disk 6, hinge block 61, and block 62. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] like Figures 1 to 7 As shown, the present invention includes the following embodiments:

[0029] Embodiment 1:

[0030] A filter self-cleaning indoor air purifier, comprising a base 1 and a filter cartridge 2 on the upper surface of the base 1; the upper end of the filter cartridge 2 is fixedly connected to a top seat 3 with an air outlet 31; the air outlet 31 is communicated with the inner side of the filter cartridge 2; the inner wall of the air outlet 31 is fixedly connected to a fan 4; the upper end of the air outlet 31 is fixedly connected to a protective net 32; the outer diameters of the top seat 3 and the base 1 are larger than the outer diameter of the filter cartridge 2; a protective cover 5 with air holes 51 is sleeved on the outer side of the filter cartridge 2; a spiral plate 52 is movably connected between the inner side of the protective cover 5 and the outer side of the filter cartridge 2; the inner edge of the spiral plate 52 is in contact with the outer wall of the filter cartridge 2; a collecting groove 11 is arranged inside the base 1; a clean gap 21 is formed between the outer side of the filter cartridge 2 and the inner side of the protective cover 5; the collecting groove 11 is connected to the clean gap 21 through an annular groove 12; the spiral plate 52 spirally scrapes impurities on the outer wall of the filter cartridge 2 into the collecting groove 11 when rotating.

[0031] In this embodiment, the second motor 13 is embedded in the upper groove wall of the collecting groove 11; the output shaft of the second motor 13 is fixedly connected to the lower end of the spiral plate 52 through the connecting rod 14; the upper end of the spiral plate 52 is close to the upper end of the filter cartridge 2; the lower end of the spiral plate 52 extends into the collecting groove 11; the collecting groove 11 and the outer wall of the base 1 are connected to the replacement groove 15; the replacement box 16 is movably connected in the replacement groove 15; the replacement box 16 opens upward.

[0032] During operation, the staff will move the air purifier to the vicinity of the workpiece to be processed, such as wood product processing or wool product processing. During the workpiece processing, wood chips will float into the air to form dust, and wool fibers in wool products will also float into the air with the air flow. As the air purifier works, the fan 4 will start to work. The operation of the fan 4 will cause the air outlet 31 to flow upward from the bottom to the top. The dust or fibers around the air purifier will enter the cleaning gap 21 with the air through the air holes 51 on the protective cover 5. Due to the action of the filter cartridge 2, the gas can smoothly pass through the filter cartridge 2 and enter the inner side of the filter cartridge 2. The gas flows from the bottom to the top inside the filter cartridge 2 and is finally discharged along the air outlet 31. The dust or fibers in the air are intercepted by the holes on the filter cartridge 2. The dust or fibers are adsorbed on the outer surface of the filter cartridge 2 under the suction force of the inner side of the filter cartridge 2. During the operation of the fan 4, the second motor 13 will work. The working second motor 13 will drive the connecting rod 14 to rotate. The rotation drives the spiral plate 52 to rotate in the cleaning gap 21. The spiral plate 52 will scrape the dust and fibers on the outer wall of the filter cartridge 2 during its rotation. Due to the specific shape of the spiral plate 52, the spiral plate 52 can move the dust and fibers on the outer wall of the filter cartridge 2 toward the spiral gap formed by the spiral plate 52 during its rotation. This principle is the same as the auger principle in the screw extruder. I will not elaborate on it here. Under the rotation of the spiral plate 52, the dust and fibers on the outer surface of the filter cartridge 2 can overcome the suction force of the filter cartridge 2 and gather downward. The spiral plate 52 screws the dust and fibers on the outer wall of the filter cartridge 2 into the annular groove 12, and finally falls into the replacement box 16 in the collection tank 11 under the action of gravity. After the replacement box 16 is filled with dust and fibers, it is taken out and discharged along the replacement groove 15, and this process is repeated. The dust and fibers on the outer wall of the filter cartridge 2 are scraped away by the spiral plate 52 during operation, thereby ensuring the filtering effect of the filter cartridge 2 and improving the purification effect of the air purifier on the surrounding air.

[0033] The present invention rotates the spiral plate 52 on the outer wall of the filter cartridge 2 so that the dust and fibers formed on the outer wall of the filter cartridge 2 after filtering are removed by the rotating spiral plate 52, thereby ensuring the cleanliness of the filter cartridge 2 and further improving the filtering and purification effect of the air purifier on the surrounding air.

[0034] Embodiment 2:

[0035] The upper end of the spiral plate 52 contacts the lower surface of the top seat 3; the spiral plate 52 is elastic; the position where the lower surface of the top seat 3 contacts the upper end of the spiral plate 52 is configured to be corrugated; fluctuations are formed during the contact between the upper end of the spiral plate 52 and the lower surface of the top seat 3.

[0036] When working, the upper end of the spiral plate 52 will press against the lower surface of the top seat 3 under the elastic force of the spiral plate 52 itself. During the rotation process, the upper end of the spiral plate 52 will be in active contact with the lower surface of the top seat 3. Since the position where the lower surface of the top seat 3 and the spiral plate 52 contact each other is arranged in a corrugated shape, the upper end of the spiral plate 52 will increase the pitch of the spiral plate 52 when it is in the upper position of the corrugation on the lower surface of the top seat 3, and the upper end of the spiral plate 52 will increase the pitch of the spiral plate 52 when it is in the lower position of the corrugation on the lower surface of the top seat 3. The spiral plate 52 is reduced, so that the pitch of the spiral plate 52 changes continuously during the rotation of the spiral plate 52. The changing pitch of the spiral plate 52 will squeeze the dust or fibers in the spiral channel to prevent the dust or fibers from being stuck in the spiral channel of the spiral plate 52. Vibration will be generated during the change of the pitch of the spiral plate 52, so that the dust or fibers on the spiral plate 52 will move downward quickly under the vibration, thereby improving the cleaning efficiency of the dust or fibers on the outer wall of the filter cartridge 2, so that the air filtration effect and filtration stability are further improved.

[0037] Embodiment 3:

[0038] The fan 4 is composed of a first motor 41 and fan blades 42; the first motor 41 is a double-headed motor; one of the output shafts of the first motor 41 is fixedly connected to the fan blades 42, and the other output shaft is fixedly connected to the screw 43; the thread of the screw 43 is bidirectional; the thread on the screw 43 is a reciprocating thread; the outer wall of the screw 43 is threadedly connected to the baffle 44 in a sealing connection; the outer wall of the baffle 44 is in active sealing contact with the inner wall of the filter cartridge 2; the inner wall of the filter cartridge 2 is fixedly connected to the slide bar 45 along the axial direction; the slide bar 45 passes through the outer wall of the baffle 44 and is slidingly sealed with the baffle 44.

[0039] In this embodiment, the upper limit position of the baffle plate 44 is not higher than the upper end of the filter cartridge 2 ; the baffle plate 44 moves up and down along the slide bar 45 during the rotation of the screw rod 43 .

[0040] In this embodiment, a one-way valve 46 is provided through the baffle plate 44 from top to bottom; the gas above the baffle plate 44 can pass through the one-way valve 46 and enter the bottom of the baffle plate 44 .

[0041] During operation, when the first motor 41 drives the fan blade 42 to rotate, the first motor 41 will also drive the screw 43 to rotate. Since the screw 43 passes through the center of the baffle plate 44 and is threadedly connected to the baffle plate 44, the baffle plate 44 will be driven to move back and forth along the length direction of the slide bar 45 during the rotation of the screw 43. For the convenience of explanation, the space inside the filter cartridge 2 of the baffle plate 44 is divided into an upper working chamber and a lower non-working chamber. Due to the action of the baffle plate 44, the external gas will enter the working chamber after passing through the cleaning gap 21 and the filter cartridge 2, and finally the filtered gas will be discharged along the air outlet 31. During the downward movement of the baffle plate 44, the space of the working chamber will be enlarged, while the space of the non-working chamber will be reduced when the baffle plate 44 moves downward. The gas pressure in the non-working chamber will increase during the downward movement of the baffle plate 44, and the gas in the non-working chamber will be squeezed and discharged along the holes on the filter cartridge 2. Since the gas in the non-working chamber passes through the filter cartridge 2 from the inside to the outside, the holes on the filter cartridge 2 can be recoiled, thereby making the filter cartridge 2 pass through the filter cartridge 2. The dust and fibers stuck in the holes on the filter cartridge 2 are flushed out, and the filter cartridge 2 is further unblocked. After the baffle plate 44 moves down to the limit position, it will start to move up, which makes the space in the non-working chamber larger and forms a negative pressure. In the case that the holes on the filter cartridge 2 are not completely unblocked, it is more difficult for external air to pass through the filter cartridge 2 and enter the non-working chamber. In this way, the baffle plate 44 will allow the gas in the working chamber to enter the non-working chamber along the one-way valve 46 during the upward movement of the baffle plate 44, on the one hand, to replenish the gas in the non-working chamber, and on the other hand, to reduce the resistance to the upward movement of the baffle plate 44. As the baffle plate 44 moves down again, the baffle plate 44 will allow the gas in the non-working chamber to pass through the filter cartridge 2 from the inside to the outside, so that the holes on the filter cartridge 2 are completely unblocked, so that when the baffle plate 44 moves up again, the external air will smoothly enter the non-working chamber along the filter cartridge 2 for replenishment; in this embodiment, the upper limit position of the baffle plate 44 is not higher than the upper end of the filter cartridge 2, so as to avoid the air outlet 31 being completely blocked by the baffle plate 44, thereby ensuring the operation of the filter cartridge 2;

[0042] The present invention enables the baffle plate 44 to move back and forth up and down on the inner side of the filter cartridge 2, so that the non-working part of the filter cartridge 2 can be backflushed during the downward movement of the baffle plate 44, so that the holes on the filter cartridge 2 can be further unblocked, thereby improving the filtering effect of the filter cartridge 2 and the air filtering efficiency.

[0043] Embodiment 4:

[0044] The air vent 51 on the protective cover 5 is hinged to the mesh disk 6 through a hinge block 61 near the opening of the filter cartridge 2; holes are arranged on the mesh disk 6; a slot 53 is arranged on the air vent 51 near the opening of the filter cartridge 2; the slot 53 is arranged away from the hinge block 61; a block 62 is clamped in the slot 53; the block 62 is fixedly connected to the mesh disk 6; the mesh disk 6 can be opened toward the inside of the protective cover 5.

[0045] In this embodiment, the hinge block 61 is arranged close to the top seat 3; the side of the mesh plate 6 close to the filter cartridge 2 is adapted to the inner wall of the protective cover 5; the inner wall of the protective cover 5 is arranged in contact with the outer edge of the spiral plate 52.

[0046] During operation, as the baffle plate 44 moves upward on the inner side of the filter cartridge 2, the space of the non-working chamber becomes larger to form a negative pressure, and the working chamber also forms a negative pressure under the action of the fan 4, so that the air holes 51 on the entire protective cover 5 will form a suction force, that is, the external gas will give a thrust to the mesh plate 6 in the air holes 51, and the aperture of the air holes 51 is smaller than the pitch of the spiral plate 52, so that a part of the mesh plate 6 is blocked by the blocking spiral plate 52, and the other part of the mesh plate 6 is turned around the hinge block 61 under the action of the air flow, so that the mesh plate 6 is in the air holes 51 toward the protective cover 5. The air hole 51 is flipped sideways to open, and the gas will pass through the opened air hole 51 to enter the clean gap 21, a small part of the gas will pass through the filter cartridge 2 to enter the non-working chamber, and most of the gas will pass through the filter cartridge 2 to enter the working chamber, and finally be discharged along the air outlet 31. As the spiral plate 52 rotates, the spiral plate 52 will squeeze the inner wall of the mesh disk 6 that is flipped toward the inside of the protective cover 5, so that part of the mesh disk 6 is squeezed back into the air hole 51, and as the spiral plate 52 rotates, the mesh disk 6 on the air hole 51 will open alternately;

[0047] As the baffle plate 44 moves downward inside the filter cartridge 2, the space in the non-working chamber becomes smaller and the air pressure increases. The gas in the non-working chamber will pass through the filter cartridge 2 to recoil the dust or fibers in the holes on the filter cartridge 2. The outer wall of the filter cartridge 2 outside the non-working chamber forms an outward airflow, and the outer wall of the filter cartridge 2 outside the working chamber forms an inward airflow. In this way, the mesh plate 6 above the baffle plate 44 is still opened under the action of the right outward-inward airflow, while the mesh plate 6 below the baffle plate 44 is in a completely closed state under the action of the airflow from the inside to the outside and the action of the mesh plate 6's own gravity. The closed state of the mesh plate 6 blocks the air vents 51. In the state, the gas in the non-working chamber will wash away the dust or fibers on the outer wall of the filter cartridge 2 during the backwash process, but due to the closed mesh disk 6, the dust and fibers are intercepted by the mesh disk 6 in the clean gap 21, and the gas finally flows out radially through the holes on the mesh disk 6. The spiral plate 52 will scrape away the dust or fibers on the inner wall of the mesh disk 6 during the rotation process, and the dust or fibers on the outer wall of the filter cartridge 2 will also be scraped away. Under the backwash airflow formed in the non-working chamber, the dust or fibers in the clean gap 21 below the baffle plate 44 can be quickly scraped away and collected by the spiral plate 52, and finally the dust and fibers will fall into the replacement box 16;

[0048] In this embodiment, the mesh plate 6 is unidirectionally hingedly connected to the hole 51 near the hole of the filter cartridge 2, so that dust or fibers on the outer wall of the filter cartridge 2 are difficult to pass through the air hole 51 and scatter under the backwash of the air flow, thereby ensuring the unblocking effect of the filter cartridge 2 while further improving the collection effect of dust or fibers, and having strong practicality.

[0049] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A filter self-cleaning indoor air purifier, comprising a base (1) and a filter cartridge (2) on the upper surface of the base (1); the upper end of the filter cartridge (2) is fixedly connected to a top seat (3) with an air outlet (31); the air outlet (31) is communicated with the inner side of the filter cartridge (2); the inner wall of the air outlet (31) is fixedly connected to a fan (4); the upper end of the air outlet (31) is fixedly connected to a protective net (32); the characteristics are: The outer diameters of the top seat (3) and the base (1) are larger than the outer diameter of the filter cartridge (2); a protective cover (5) with air holes (51) is sleeved on the outer side of the filter cartridge (2); a spiral plate (52) is movably connected between the inner side of the protective cover (5) and the outer side of the filter cartridge (2); the inner edge of the spiral plate (52) contacts the outer wall of the filter cartridge (2); a collecting groove (11) is arranged inside the base (1); a clean gap (21) is formed between the outer side of the filter cartridge (2) and the inner side of the protective cover (5); the collecting groove (11) is connected to the clean gap (21) via an annular groove (12); the spiral plate (52) spirally scrapes impurities on the outer wall of the filter cartridge (2) into the collecting groove (11) when rotating.

2. The filter self-cleaning indoor air purifier according to claim 1, characterized in that: The second motor (13) is embedded in the upper groove wall of the collecting groove (11); the output shaft of the second motor (13) is fixedly connected to the lower end of the spiral plate (52) through a connecting rod (14); the upper end of the spiral plate (52) is close to the upper end of the filter cartridge (2); the lower end of the spiral plate (52) extends into the collecting groove (11); the collecting groove (11) and the outer wall of the base (1) are connected to the replacement groove (15); the replacement box (16) is movably connected in the replacement groove (15); the opening of the replacement box (16) faces upward.

3. The filter self-cleaning indoor air purifier according to claim 1, characterized in that: The upper end of the spiral plate (52) contacts the lower surface of the top seat (3); the spiral plate (52) is elastic; the position where the lower surface of the top seat (3) contacts the upper end of the spiral plate (52) is configured to be corrugated; and fluctuations are generated during the contact between the upper end of the spiral plate (52) and the lower surface of the top seat (3).

4. The filter self-cleaning indoor air purifier according to claim 1, characterized in that: The fan (4) is composed of a first motor (41) and a fan blade (42); the first motor (41) is a double-headed motor; one of the output shafts of the first motor (41) is fixedly connected to the fan blade (42), and the other output shaft is fixedly connected to the screw (43); the thread of the screw (43) is bidirectional; the outer wall of the screw (43) is threadedly connected to the baffle (44); the outer wall of the baffle (44) is in active sealing contact with the inner wall of the filter cartridge (2); the inner wall of the filter cartridge (2) is fixedly connected to the slide bar (45) along the axial direction; the slide bar (45) passes through the outer wall of the baffle (44) and is slidably and sealingly connected to the baffle (44).

5. The filter self-cleaning indoor air purifier according to claim 4, characterized in that: The upper limit position of the baffle (44) is not higher than the upper end of the filter cartridge (2); the baffle (44) moves up and down along the slide bar (45) during the rotation of the screw rod (43).

6. The filter self-cleaning indoor air purifier according to claim 4, characterized in that: The baffle plate (44) is provided with a one-way valve (46) extending through the upper and lower parts thereof; gas above the baffle plate (44) can pass through the one-way valve (46) and enter below the baffle plate (44).

7. The filter self-cleaning indoor air purifier according to claim 4, characterized in that: The air vent (51) on the protective cover (5) is hingedly connected to the mesh disk (6) via a hinge block (61) near the opening of the filter cartridge (2); the mesh disk (6) is provided with holes; the air vent (51) is provided with a clamping groove (53) near the opening of the filter cartridge (2); the clamping groove (53) is arranged away from the hinge block (61); a clamping block (62) is clamped in the clamping groove (53); the clamping block (62) is fixedly connected to the mesh disk (6); the mesh disk (6) can be opened toward the inside of the protective cover (5).

8. The filter self-cleaning indoor air purifier according to claim 7, characterized in that: The hinge block (61) is arranged close to the top seat (3); the side of the mesh plate (6) close to the filter cartridge (2) is adapted to the inner wall of the protective cover (5); the inner wall of the protective cover (5) is arranged in contact with the outer edge of the spiral plate (52).

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