A filter element and a filter having the same

Abstract

The present invention relates to the technical field of air filters, and in particular to a filter element and a filter having the filter element, including a filtering device installed in the inner cavity of a filter body, the filtering device including a first mounting seat and a second mounting seat, the inner cavity of the first mounting seat is provided with a plurality of high-efficiency filter elements, the inner cavity of the second mounting seat is provided with a plurality of low-efficiency filter elements, and both the high-efficiency filter elements and the low-efficiency filter elements are used to filter air. In the present invention, by equipping an air detector, the filter can monitor the air quality in real time, and the servo motor drives the gear to rotate and adjust the position of the first mounting seat and the second mounting seat, effectively avoiding excessive use of the high-efficiency filter element, thereby extending the service life of the high-efficiency filter element, reducing the frequency of replacing the filter element, and reducing the cost of use. At the same time, since the air passing resistance of the primary filter element is small, the fan energy consumption and noise are reduced, providing users with a more energy-saving and comfortable use experience.

Description

Technical Field

[0001] The invention relates to the technical field of air filters, in particular to a filter element and a filter having the filter element. Background Art

[0002] Traditional filter designs generally have certain limitations.

[0003] Specifically, traditional filters often use fixed-type filter elements, which cannot be adjusted adaptively according to changes in actual air quality. When the air quality is good, using high-efficiency filter elements is obviously a waste of resources, shortening the service life of high-efficiency filter elements, increasing the frequency of filter element replacement, and increasing the cost of use. At the same time, since high-efficiency filter elements usually have higher filtration efficiency and can filter out smaller particles and more harmful substances, their internal structure and materials are more dense, so the resistance to air passing through is also greater. When air passes through the high-efficiency filter element, a larger pressure difference is required to push the air through, which increases the energy consumption and noise of the fan. Summary of the invention

[0004] The object of the present invention is to provide a filter element and a filter having the filter element to solve the problems raised in the above background technology.

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

[0006] A filter element comprising

[0007] A filter device is installed in the inner cavity of the filter body, the filter device includes a first mounting seat and a second mounting seat, the inner cavity of the first mounting seat is provided with a plurality of high-efficiency filter elements, the inner cavity of the second mounting seat is provided with a plurality of low-efficiency filter elements, the high-efficiency filter elements and the low-efficiency filter elements are both used to filter air, and the filtering effect of the high-efficiency filter element is stronger than that of the low-efficiency filter element, the top of the first mounting seat is provided with a mounting groove for installing the high-efficiency filter element, and the bottom of the inner wall of the mounting groove is provided with a plurality of connection ports;

[0008] A high-efficiency filter element comprises a filter element body, a base is arranged at the bottom of the filter element body, a connecting piece having the same number as the connecting port is arranged on the outside of the base, a movable shaft is movably connected to the inner cavity of the filter element body, and a first magnetic ring having the same number as the connecting piece is arranged on the outside of the movable shaft;

[0009] The connecting piece includes a fixing seat, an inner cavity of the fixing seat is provided with a spring, one end of the inner cavity of the fixing seat is movably connected with a connecting block, the outer side of the connecting block and the inner wall of the connecting port are adapted to each other, a second magnetic circle is provided on one side of the connecting block, and the corresponding surfaces of the second magnetic circle and the first magnetic circle attract each other.

[0010] Preferably, the filter element body includes a fine filter layer, a medium filter layer, and a coarse filter layer. When air passes through the filter element body, it passes through the coarse filter layer, the medium filter layer, and the fine filter layer in sequence for multi-stage filtration. The coarse filter layer is used to capture large particles of impurities in the air, the medium filter layer is used to further capture fine dust, and the fine filter layer is used to remove bacteria, viruses and tiny particles.

[0011] Preferably, an anti-dropout sleeve is provided on the outer side of the connecting block, an anti-dropout groove is provided on the inner wall of the fixing seat, and the outer side of the anti-dropout sleeve is transitionally matched with the inner wall of the anti-dropout groove.

[0012] Preferably, the inner cavity of the first mounting seat is located below the high-efficiency filter element and is also provided with an activated carbon plate, which can absorb harmful gases, odors and tiny harmful substances in the air.

[0013] A filter comprising

[0014] A filter body, wherein the inner cavity of the filter body is provided with a filter device, placement bins are respectively provided on both sides of the filter body, the placement bins can be used to place the first mounting seat or the second mounting seat, a bottom bin is opened at the bottom of the inner cavity of the filter body, a stepper motor is provided in the inner cavity of the bottom bin, and a fan is provided at the output end of the stepper motor, and the fan is used to drive air to pass through the filter device for filtering;

[0015] An air detector is arranged in the inner wall of the filter body, and is used to detect key indicators of the air entering the inner cavity of the filter body. A particle sensor and a gas concentration sensor are arranged inside the filter body. The particle sensor is used to detect the particle concentration of the gas, and the gas concentration sensor is used to detect the concentration of harmful gases;

[0016] The control mechanism is arranged below the filtering device, and the control mechanism includes a servo motor, the output end of the servo motor is fixedly connected to a driving shaft, one end of the driving shaft is provided with a gear, the top outer edge of the gear is meshed with a rack, and the top of the rack is fixedly connected to the bottom of the first mounting seat and the second mounting seat.

[0017] Preferably, the inner wall of the filter body is provided with electromagnets at both ends of the first mounting seat, which will generate magnetic force when energized. Metal blocks are provided on both sides of the first mounting seat and the second mounting seat, which will generate suction on the metal blocks when energized, thereby firmly fixing the first mounting seat or the second mounting seat in the inner cavity of the filter body.

[0018] Preferably, a controller is also provided inside the filter body, and the controller is used to receive detection information of air quality from the air detector. The filter body can also control the start of the servo motor, and adjust the positions of the first mounting seat and the second mounting seat by controlling the servo motor to switch the corresponding filtering mode. The controller can also control the output speed of the stepper motor to adjust the rotation speed of the fan.

[0019] Preferably, infrared sensors are provided on both sides of the first mounting seat on the inner wall of the filter body, and the infrared sensors are used to detect the position of the first mounting seat or the second mounting seat. The controller can receive the position information of the infrared sensor and control the power on or off state of the electromagnet as needed.

[0020] Preferably, a push-pull plate for opening the inner cavity of the placement bin is provided on the top of the placement bin, and the high-efficiency filter element or the low-efficiency filter element can be easily replaced by opening the push-pull plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, by equipping an air detector, the filter can monitor the air quality in real time, and the servo motor drives the gear to rotate to adjust the positions of the first mounting seat and the second mounting seat. When the air quality is good, the first mounting seat is moved to the inside of the filter body, and when the air quality is poor, the second mounting seat is moved to the inside of the filter body, effectively avoiding excessive use of the high-efficiency filter element, thereby extending the service life of the high-efficiency filter element, reducing the frequency of replacing the filter element, and reducing the cost of use. At the same time, since the air passing resistance of the primary filter element is small, the fan energy consumption and noise can be reduced, providing users with a more energy-saving and comfortable use experience;

[0023] 2. In the present invention, the filter element adopts a multi-layer composite structure design, including a coarse filter layer, a medium filter layer and a fine filter layer, combined with an activated carbon plate, to form an efficient air purification system. The multi-layer structure can progressively remove impurities, dust and bacteria in the air, while the activated carbon plate effectively absorbs harmful gases and odors, thereby significantly improving air quality;

[0024] 3. In the present invention, by rotating the movable shaft to adjust the position of the first magnetic ring, the high-efficiency filter element is fixed or loosened to the inner cavity of the installation slot, and the user can quickly complete the removal and installation of the filter element as needed, thereby improving the maintenance efficiency of the filter and extending the service life of the filter. At the same time, the user can choose different types of filter elements for replacement according to their own needs, further increasing the flexibility and practicality of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 It is an exploded schematic diagram of the overall structure of the filter in the present invention;

[0028] Figure 4 For the present invention Figure 2 The overall structural diagram of the storage compartment and the control mechanism;

[0029] Figure 5 For the present invention Figure 4 Schematic diagram of the overall structure in;

[0030] Figure 6 For the present invention Figure 5 Schematic diagram of the overall structure of the medium and high efficiency filter element;

[0031] Figure 7 It is a cross-sectional view of the high-efficiency filter element in the present invention;

[0032] Figure 8 For the present invention Figure 6 Schematic diagram of the overall structure of the connecting parts;

[0033] In the figure: 1. filter body; 11. bottom bin; 12. air detector; 13. electromagnet; 14. stepper motor; 15. fan; 2. placement bin; 21. push-pull plate; 3. control mechanism; 31. servo motor; 32. drive shaft; 33. gear; 34. rack; 4. filtering device; 41. first mounting seat; 42. second mounting seat; 43. metal block; 44. mounting groove; 45. connecting port; 46. activated carbon plate; 5. high-efficiency filter element; 51. filter element body; 511. fine filter layer; 512. medium filter layer; 513. coarse filter layer; 52. base; 53. connector; 531. fixing seat; 532. spring; 533. connecting block; 534. second magnetic ring; 535. anti-drop sleeve; 536. anti-drop groove; 54. movable shaft; 55. first magnetic ring; 6. low-efficiency filter element; 7. controller. DETAILED DESCRIPTION

[0034] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1-8 , the present invention provides a technical solution:

[0036] A filter element comprising

[0037] The filter device 4 is installed in the inner cavity of the filter body 1. The filter device 4 includes a first mounting seat 41 and a second mounting seat 42. The inner cavity of the first mounting seat 41 is provided with a plurality of high-efficiency filter elements 5. The inner cavity of the second mounting seat 42 is provided with a plurality of low-efficiency filter elements 6. Both the high-efficiency filter element 5 and the low-efficiency filter element 6 are used to filter air, and the filtering effect of the high-efficiency filter element 5 is stronger than that of the low-efficiency filter element 6. The top of the first mounting seat 41 is provided with a mounting groove 44 for mounting the high-efficiency filter element 5. The bottom of the inner wall of the mounting groove 44 is provided with a plurality of connection ports 45.

[0038] The high-efficiency filter element 5 comprises a filter element body 51, a base 52 is arranged at the bottom of the filter element body 51, and the outer side of the base 52 is provided with connecting pieces 53 of the same number as the connecting port 45, and the inner cavity of the filter element body 51 is movably connected with a movable shaft 54, and the outer side of the movable shaft 54 ​​is provided with first magnetic rings 55 of the same number as the connecting piece 53;

[0039] The connecting member 53 includes a fixing seat 531, an inner cavity of the fixing seat 531 is provided with a spring 532, one end of the inner cavity of the fixing seat 531 is movably connected with a connecting block 533, the outer side of the connecting block 533 is adapted to the inner wall of the connecting port 45, and a second magnetic ring 534 is provided on one side of the connecting block 533, and the corresponding surfaces of the second magnetic ring 534 and the first magnetic ring 55 attract each other.

[0040] In this embodiment, please refer to Figure 7 The filter element body 51 includes a fine filter layer 511, a medium filter layer 512, and a coarse filter layer 513. When air passes through the filter element body 51, it passes through the coarse filter layer 513, the medium filter layer 512, and the fine filter layer 511 in turn for multi-stage filtration. The coarse filter layer 513 is used to capture large particles of impurities in the air, the medium filter layer 512 is used to further capture fine dust, and the fine filter layer 511 is used to remove bacteria, viruses and tiny particles. In this embodiment, the high-efficiency filter element 5 is set as a multi-stage filtration structure, so that the filtration effect is significantly improved, and it can be used to purify air of poor quality.

[0041] In this embodiment, please refer to Figure 8 An anti-dropout sleeve 535 is provided on the outer side of the connecting block 533, and an anti-dropout groove 536 is provided on the inner wall of the fixing seat 531. The outer side of the anti-dropout sleeve 535 is transitionally matched with the inner wall of the anti-dropout groove 536. In this embodiment, when the connecting block 533 moves along the inner cavity of the fixing seat 531, the anti-dropout sleeve 535 simultaneously moves back and forth along the inner wall of the anti-dropout groove 536. The anti-dropout sleeve 535 is transitionally matched with the anti-dropout groove 536 to prevent the anti-dropout sleeve 535 from escaping from the inner cavity of the anti-dropout groove 536.

[0042] In this embodiment, please refer to Figure 5The inner cavity of the first mounting seat 41 is located below the high-efficiency filter element 5 and is also provided with an activated carbon plate 46. The activated carbon plate 46 can absorb harmful gases, odors and tiny harmful substances in the air. In this embodiment, by arranging the activated carbon plate 46 below the high-efficiency filter element 5, the harmful gases, odors and tiny harmful substances in the air can be effectively absorbed, thereby further improving the quality of the air. The activated carbon plate 46 can also extend the service life of other filter elements and reduce the replacement frequency.

[0043] A filter, see Figure 1-8 ,include

[0044] A filter body 1, an inner cavity of the filter body 1 is provided with a filter device 4, a placement bin 2 is provided on both sides of the filter body 1, the placement bin 2 can be used to place a first mounting seat 41 or a second mounting seat 42, a bottom bin 11 is provided at the bottom of the inner cavity of the filter body 1, a stepper motor 14 is provided in the inner cavity of the bottom bin 11, and a fan 15 is provided at the output end of the stepper motor 14, and the fan 15 is used to drive air to pass through the filter device 4 for filtering;

[0045] The air detector 12 is arranged in the inner wall of the filter body 1, and is used to detect key indicators of the air entering the inner cavity of the filter body 1. A particle sensor and a gas concentration sensor are arranged inside the filter body 1. The particle sensor is used to detect the particle concentration of the gas, and the gas concentration sensor is used to detect the concentration of harmful gases;

[0046] The control mechanism 3 is arranged below the filtering device 4, and includes a servo motor 31. The output end of the servo motor 31 is fixedly connected to a driving shaft 32. A gear 33 is arranged at one end of the driving shaft 32. A rack 34 is meshed at the top outer edge of the gear 33. The top of the rack 34 is fixedly connected to the bottom of the first mounting seat 41 and the second mounting seat 42.

[0047] In this embodiment, please refer to Figure 2-4 The inner wall of the filter body 1 is located at both ends of the first mounting seat 41 and is respectively provided with an electromagnet 13. When the electromagnet 13 is energized, magnetic force will be generated. Metal blocks 43 are provided on both sides of the first mounting seat 41 and the second mounting seat 42. When the electromagnet 13 is energized, suction will be generated on the metal block 43, thereby firmly fixing the position of the first mounting seat 41 or the second mounting seat 42 in the inner cavity of the filter body 1. In this embodiment, when the first mounting seat 41 and the second mounting seat 42 are switched, the electromagnet 13 is energized to adsorb the metal block 43, so that the position of the first mounting seat 41 or the second mounting seat 42 is fixed in the inner cavity of the filter body 1, thereby avoiding the position deviation of the first mounting seat 41 or the second mounting seat 42, which affects the filtering effect.

[0048] In this embodiment, please refer to Figure 2-3A controller 7 is also provided inside the filter body 1. The controller 7 is used to receive the detection information of the air quality from the air detector 12. The filter body 1 can also control the start of the servo motor 31, and adjust the positions of the first mounting seat 41 and the second mounting seat 42 by controlling the servo motor 31 to switch the corresponding filtering mode. The controller 7 can also control the output speed of the stepper motor 14 to adjust the rotation speed of the fan 15. In this embodiment, when the controlled air quality is poor, the first mounting seat 41 is moved to the inner cavity of the filter body 1 for high-efficiency filtration. When the air quality is high, the second mounting seat 42 is moved to the inner cavity of the filter body 1 and the rotation speed of the fan 15 is slowed down to perform basic filtration.

[0049] In this embodiment, please refer to Figure 2 Infrared sensors are provided on both sides of the first mounting seat 41 of the inner wall of the filter body 1. The infrared sensors are used to detect the position of the first mounting seat 41 or the second mounting seat 42. The controller 7 can receive the position information of the infrared sensor and control the power-on or power-off state of the electromagnet 13 as needed. In this embodiment, the position of the first mounting seat 41 or the second mounting seat 42 can be accurately located by the infrared sensor. After ensuring that the first mounting seat 41 or the second mounting seat 42 is in the inner cavity of the filter body 1 and the position is accurate, the position of the first mounting seat 41 and the second mounting seat 42 is locked by energizing the electromagnet 13, further avoiding the existence of a gap between the first mounting seat 41 or the second mounting seat 42 and the inner wall of the filter body 1, causing gas to flow out through the gap and affect the filtering effect of the filter.

[0050] In this embodiment, please refer to Figure 3 A push-pull plate 21 for opening the inner cavity of the placement bin 2 is provided at the top of the placement bin 2. By opening the push-pull plate 21, it is convenient to replace the high-efficiency filter element 5 or the low-efficiency filter element 6. In this embodiment, when the first mounting seat 41 or the second mounting seat 42 is located in the inner cavity of the placement bin 2, by opening the push-pull plate 21 and cooperating with the rotating movable shaft 54, the high-efficiency filter element 5 or the low-efficiency filter element 6 can be disassembled.

[0051] Working principle of the present invention:

[0052] Step 1: The air detector 12 is provided with a particle sensor and a gas concentration sensor to monitor the gas to be filtered in real time, including the particle concentration and harmful gas of the detected gas, and converts the real-time monitored data such as the particle concentration and the harmful gas concentration into electrical signals, and transmits the electrical signals to the controller 7. After the controller 7 analyzes the information data of the gas, if the gas quality is lower than the predetermined threshold value, the servo motor 31 is used to give power to control the rotation of the drive shaft 32, and the drive shaft 32 drives the gear 33 to rotate. Since the outer edge of the gear 33 is meshed with the bottom of the rack 34, the gear 33 is rotated to drive the rack 34 to move, and the rack 34 is moved to drive the first mounting seat 41 or the second mounting seat 42 to move, and the rotation direction of the gear 33 is controlled to adjust the movement direction of the first mounting seat 41 and the second mounting seat 42. 1 is moved to the interior of the filter body 1, at which time the second mounting seat 42 is located in the inner cavity of the placement bin 2, and the high-efficiency filter element 5 adopts a multi-layer composite structure design, including a fine filter layer 511, a medium filter layer 512 and a coarse filter layer 513, combined with an activated carbon plate, to form an efficient air purification system, so that the filter body 1 has a stronger filtering ability, so that low-quality air can be processed through the filter body 1, and when the air detector 12 detects that the quality of the air to be filtered is higher than a predetermined threshold, according to the above principle, the second mounting seat 42 is moved to the inner cavity of the filter body 1 through the control mechanism 3, so that the first mounting seat 41 is moved to the interior of the placement bin 2, and the air is filtered through the second mounting seat 42 and the low-efficiency filter element 6, so as to avoid excessive use of the first mounting seat 41 and the high-efficiency filter element 5, and at the same time, since the air passing resistance of the high-efficiency filter element 5 is small, the fan energy consumption and noise are reduced;

[0053] Step 2, when the first mounting seat 41 or the second mounting seat 42 is located in the inner cavity of the placement chamber 2, the push-pull plate 21 is opened by external force, and the movable shaft 54 ​​is rotated to drive the first magnetic ring 55 to rotate. When the first magnetic ring 55 is rotated to the rear of the connecting member 53, the corresponding surfaces of the first magnetic ring 55 and the second magnetic ring 534 attract each other, so that under the action of suction, the second magnetic ring 534 drives the connecting block 533 to move backward and squeeze the spring 532, causing the spring 532 to deform. When the connecting block 533 moves backward, it is separated from the inner cavity of the connecting port 45. At this time, the high-efficiency filter element 5 and the mounting groove 4 When the connection of the filter element 4 is disconnected, the high-efficiency filter element 5 or the low-efficiency filter element 6 can be removed for replacement. When installing, the high-efficiency filter element 5 is re-connected with the inner cavity of the installation groove 44, and the connecting piece 53 is aligned with the connecting port 45, and the connecting piece 53 is rotated again to make the first magnetic circle 55 leave the rear of the connecting piece 53, so that the magnetic force between the first magnetic circle 55 and the second magnetic circle 534 disappears, so that the spring 532 loses pressure and returns to its original state, and the spring 532 rebounds to lift the connecting block 533, so that the connecting block 533 moves forward and re-enters the inner cavity of the connecting port 45, and the filter element can be re-installed in the mounting seat.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. 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. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements 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, characterized in that: include A filter body (1), wherein the inner cavity of the filter body (1) is provided with a filter device (4), A filter device (4) is installed in the inner cavity of the filter body (1), the filter device (4) comprising a first mounting seat (41) and a second mounting seat (42), the inner cavity of the first mounting seat (41) being provided with a plurality of high-efficiency filter elements (5), the inner cavity of the second mounting seat (42) being provided with a plurality of low-efficiency filter elements (6), the high-efficiency filter elements (5) and the low-efficiency filter elements (6) both being used to filter air, and the filtering effect of the high-efficiency filter elements (5) being stronger than that of the low-efficiency filter elements (6), the top of the first mounting seat (41) being provided with a mounting groove (44) for mounting the high-efficiency filter elements (5), the inner wall bottom of the mounting groove (44) being provided with a plurality of connection ports (45); A high-efficiency filter element (5), comprising a filter element body (51), a base (52) being arranged at the bottom of the filter element body (51), connecting pieces (53) being arranged on the outside of the base (52) in the same number as the connecting port (45), a movable shaft (54) being movably connected to the inner cavity of the filter element body (51), and first magnetic rings (55) being arranged on the outside of the movable shaft (54) in the same number as the connecting pieces (53); The connecting member (53) comprises a fixing seat (531), the inner cavity of the fixing seat (531) is provided with a spring (532), one end of the inner cavity of the fixing seat (531) is movably connected with a connecting block (533), the outer side of the connecting block (533) and the inner wall of the connecting port (45) are mutually adapted, and a second magnetic ring (534) is provided on one side of the connecting block (533), and the corresponding surfaces of the second magnetic ring (534) and the first magnetic ring (55) attract each other; The filter element body (51) comprises a fine filter layer (511), a medium filter layer (512), and a coarse filter layer (513). When air passes through the filter element body (51), the air passes through the coarse filter layer (513), the medium filter layer (512), and the fine filter layer (511) in sequence for multi-stage filtration. The coarse filter layer (513) is used to capture large particles of impurities in the air, the medium filter layer (512) is used to further capture fine dust, and the fine filter layer (511) is used to remove bacteria, viruses, and tiny particles. The outer side of the connecting block (533) is provided with an anti-dropout sleeve (535), the inner wall of the fixing seat (531) is provided with an anti-dropout groove (536), and the outer side of the anti-dropout sleeve (535) and the inner wall of the anti-dropout groove (536) are transitionally matched; Placement bins (2) are respectively provided on both sides of the filter body (1), and the placement bins (2) can be used to place the first mounting seat (41) or the second mounting seat (42). A bottom bin (11) is provided at the bottom of the inner cavity of the filter body (1), and a stepper motor (14) is provided in the inner cavity of the bottom bin (11). A fan (15) is provided at the output end of the stepper motor (14), and the fan (15) is used to drive air to pass through the filter device (4) for filtering; An air detector (12) is arranged in the inner wall of the filter body (1) and is used to detect key indicators of air entering the inner cavity of the filter body (1); a particle sensor and a gas concentration sensor are arranged inside the filter body (1); the particle sensor is used to detect the particle concentration of the gas, and the gas concentration sensor is used to detect the concentration of harmful gases; A control mechanism (3) is arranged below the filtering device (4), the control mechanism (3) comprising a servo motor (31), the output end of the servo motor (31) being fixedly connected to a driving shaft (32), one end of the driving shaft (32) being provided with a gear (33), the top outer edge of the gear (33) being meshed with a rack (34), the top of the rack (34) being fixedly connected to the bottom of the first mounting seat (41) and the second mounting seat (42); The inner wall of the filter body (1) is provided with electromagnets (13) at both ends of the first mounting seat (41), and when the electromagnets (13) are energized, magnetic force is generated; metal blocks (43) are provided on both sides of the first mounting seat (41) and the second mounting seat (42), and when the electromagnets (13) are energized, suction is generated on the metal blocks (43), thereby firmly fixing the first mounting seat (41) or the second mounting seat (42) in the inner cavity of the filter body (1); A controller (7) is also provided inside the filter body (1). The controller (7) is used to receive detection information about air quality from the air detector (12). The filter body (1) can also control the start of the servo motor (31) and adjust the positions of the first mounting seat (41) and the second mounting seat (42) by controlling the servo motor (31) to switch the corresponding filtering mode. The controller (7) can also control the output speed of the stepping motor (14) to adjust the rotation speed of the fan (15).

2. A filter according to claim 1, characterized in that: Infrared sensors are provided on the inner wall of the filter body (1) on both sides of the first mounting seat (41), the infrared sensors being used to detect the position of the first mounting seat (41) or the second mounting seat (42), and the controller (7) is capable of receiving position information of the infrared sensors and controlling the power-on or power-off state of the electromagnet (13) as required.

3. A filter according to claim 1, characterized in that: A push-pull plate (21) for opening the inner cavity of the placement bin (2) is provided on the top of the placement bin (2); the high-efficiency filter element (5) or the low-efficiency filter element (6) can be easily replaced by opening the push-pull plate (21).

4. A filter according to claim 1, characterized in that: The inner cavity of the first mounting seat (41) is located below the high-efficiency filter element (5) and is also provided with an activated carbon plate (46). The activated carbon plate (46) can absorb harmful gases, odors and tiny harmful substances in the air.

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