Air filter device and air treatment device

Abstract

The application relates to an air filtering device and an air treatment device, and belongs to the technical field of air treatment. A plurality of first filter screen units in a first filter screen assembly are arranged on a rotating piece of a first driving assembly, and a second filter screen unit in a second filter screen assembly surrounds the first filter screen units. The first filter screen units can rotate towards the direction close to or far away from the rotating center of the rotating piece under the drive of the rotating piece, so that the first filter screen units are switched between a first state and a second state. When the first filter screen units are in the first state, the plurality of first filter screen units surround a closed ring structure. When the first filter screen units are in the second state, two adjacent filter screen units are staggered with each other and form a gap. The formation of the gap can reduce the flow resistance of the airflow passing through the second filter screen unit, so that the airflow entering the air treatment device passes through the second filter screen unit and bypasses the first filter screen unit, thereby providing multiple filtering modes for the user.

Description

Technical Field

[0001] This application relates to the field of air treatment technology, and in particular to an air filtration device and an air treatment device. Background Technology

[0002] Air purifiers use multiple layers of filters to filter pollutants in the air, but they only offer a single filtration mode, and the multiple layers of filters create significant air resistance, making it impossible to meet users' needs for multiple efficient purification modes. Utility Model Content

[0003] In view of this, embodiments of this application provide an air filtration device and an air treatment device having the air filtration device.

[0004] In a first aspect, embodiments of this application provide an air filtration device for filtering airflow entering an air handling device. The air filtration device includes: a first driving assembly including a rotating member capable of rotating about a first direction, the rotating member having a rotation center; a first filter assembly including a plurality of first filter units spaced apart on the rotating member along the rotation direction; and a second filter assembly including second filter units surrounding the first filter units along the rotation direction. The first filter units are rotatable under the drive of the rotating member in a direction closer to or further from the rotation center, switching between a first state and a second state. In the first state, the first filter units are arranged sequentially along the rotation direction to form a closed annular structure, allowing airflow entering the air handling device to pass through the second filter units and the first filter units. In the second state, adjacent first filter units are staggered and form gaps, allowing airflow entering the air handling device to pass through the second filter units and bypass the first filter units.

[0005] Optionally, the first filter unit includes a first end and a second end that are disposed opposite to each other along the rotation direction; the first filter unit is in a first state, and in two adjacent first filter units along the rotation direction, the first end of one first filter unit is disposed opposite to the second end of the other first filter unit.

[0006] Optionally, the first filter unit includes a first filter for filtering pollutants in the airflow; the first filter unit is in a second state, in two adjacent first filter units along the rotation direction, the first end of one first filter unit and the first filter of the other first filter unit are opposite to each other and spaced apart, so as to form a gap between the first end and the opposite surface of the first filter.

[0007] Optionally, along the rotation direction, the distance between the opposite surfaces of the first end and the first filter screen is L mm, and the value of L decreases from the end closer to the rotation center to the end farther away from the rotation center.

[0008] Optionally, the first filter assembly further includes a connector disposed on the side of the first filter unit away from the rotating member along the first direction; the first filter unit includes a third end and a fourth end disposed opposite to each other along the first direction, the third end being rotatably connected to the connector, and the fourth end being connected to the rotating member; the rotating member can drive the fourth end to move during rotation, so that the first filter unit can rotate in a direction closer to or away from the rotation center.

[0009] Optionally, the first filter unit further includes a first protrusion protruding from the third end and a second protrusion protruding from the fourth end; the third end is rotatably connected to the connector through the first protrusion, and the fourth end is connected to the rotating member through the second protrusion; during rotation, the rotating member can drive the second protrusion to move towards or away from the rotation center, so that the first filter unit can rotate towards or away from the rotation center with the first protrusion as the axis.

[0010] Optionally, a guide portion is formed on the rotating member, extending from the edge of the rotating member toward the rotation center; the second protrusion is connected to the guide portion, and the rotating member drives the second protrusion to move along the guide portion during rotation, so that the second protrusion moves closer to or further away from the rotation center.

[0011] Optionally, along the rotation direction, the first protrusion and the second protrusion are spaced apart; the first protrusion is adjacent to the second end, and the second protrusion is adjacent to the first end.

[0012] Optionally, the guide portion can be a guide groove or a guide hole, and the cross-sectional shape of the guide portion can be arc-shaped.

[0013] Optionally, the first filter assembly further includes a support member in the shape of a tube, with a rotating member and a connecting member respectively disposed at opposite ends of the support member along a first direction; a receiving portion through the side wall of the support member is formed, and the first filter unit is rotatably disposed in the receiving portion.

[0014] Optionally, the number of first filter units is at least three, and the cross-sectional shape of the first filter unit is square; the first filter unit is in a first state, and at least three first filter units are arranged sequentially along the rotation direction and form a polygonal ring structure.

[0015] Optionally, the first drive assembly further includes a first drive member and a rotating shaft; the rotating member is sleeved on the rotating shaft, the first drive member is connected to the rotating shaft, and the first drive member drives the rotating member to rotate through the rotating shaft.

[0016] Optionally, the first drive assembly further includes a transmission component connected to the rotating shaft; the first drive component drives the rotating shaft to rotate via the transmission component, and the rotating shaft drives the rotating component to rotate.

[0017] Optionally, the transmission component includes a driving wheel and a driven wheel. The driving wheel is connected to the first driving component, and the driven wheel is sleeved on the rotating shaft and meshes with the driving wheel. The driven wheel is fan-shaped. The first filter unit is in a first state, and the driving wheel meshes with one end of the tooth surface of the driven wheel in the extension direction. The first filter unit is in a second state, and the driving wheel meshes with the other end of the tooth surface of the driven wheel in the extension direction.

[0018] Secondly, embodiments of this application provide an air handling device, comprising: a housing having a first air inlet, a second air inlet, and an air outlet, the first air inlet and the air outlet being interconnected, and the second air inlet being configured to communicate with the air outlet; and an air filtration device according to any embodiment of the first aspect, the air filtration device being disposed inside the housing; the air filtration device further comprising an air inlet switch assembly, the air inlet switch assembly comprising: a base disposed on a side of a rotating member away from the first filter assembly along a first direction, the base and the second filter assembly being spaced apart to define an air inlet channel; and a shielding member disposed on the base and located at the air inlet channel, wherein the air inlet end of the air inlet channel faces the second air inlet, the shielding member being disposed between the air inlet channel and the second air inlet, the shielding member being movable along the first direction to open or close the air inlet channel; when open, airflow passes through the air inlet channel, bypasses the second filter unit, and enters the first filter unit; when closed, airflow passes through the second filter unit and the first filter unit.

[0019] Optionally, the shield moves along the first direction to abut against the second filter unit, closing the air inlet channel; the shield moves away from the second filter unit along the first direction, opening the air inlet channel.

[0020] Optionally, the air intake switch assembly also includes a second drive assembly, which is disposed on the base and includes a second drive member connected to the shield to drive the shield to move along the first direction.

[0021] Optionally, the first filter unit is in a first state and the second air inlet and air inlet channel are closed. Airflow enters the air handling unit through the first air inlet, passes through the second filter unit and the first filter unit, and is then discharged from the air outlet. Alternatively, the first filter unit is in a first state and the second air inlet and air inlet channel are connected. Airflow enters the air inlet channel through the second air inlet, bypasses the second filter unit, enters the first filter unit, and is then discharged from the air outlet. Or, the first filter unit is in a second state and the second air inlet and air inlet channel are closed. Airflow enters the air handling unit through the first air inlet, passes through the second filter unit, bypasses the first filter unit, and is then discharged from the air outlet.

[0022] The air filtration device provided in this application embodiment arranges multiple first filter units in a first filter assembly on a rotating component of a first drive assembly, and arranges second filter units in a second filter assembly around the first filter units along the rotation direction of the rotating component. The first filter units can rotate towards or away from the rotation center of the rotating component under the drive of the rotating component, allowing the first filter units to switch between a first state and a second state. In the first state, multiple first filter units form a closed ring structure, allowing the airflow entering the air handling device to pass through both the second and first filter units, forming a dual filtration mode for the airflow. In the second state, two adjacent filter units are staggered and form a gap. The formation of the gap reduces the flow resistance of the first filter unit to the airflow passing through the second filter unit, allowing the airflow entering the air handling device to pass through the second filter unit and bypass the first filter unit, increasing the airflow through the second filter unit and enhancing the filtration efficiency of the second filter unit. This forms an enhanced filtration mode for the airflow by the second filter assembly, providing users with multiple filtration modes.

[0023] The air handling device provided in this application includes an air filtration device and an air inlet switch assembly. A blocking member in the air inlet switch assembly can move along a first direction to open or close the air inlet channel. When the first filter unit is in a first state and the air inlet channel is closed, the airflow entering the air handling device through the first air inlet passes through both the first and second filter units, forming a dual filtration mode. When the first filter unit is in the first state and the air inlet channel is open, the airflow enters the air inlet channel through the second air inlet and bypasses the second filter unit before entering the first filter unit, forming an enhanced filtration mode for the first filter unit, improving its filtration efficiency. When the first filter unit is in a second state and the air inlet channel is closed, the airflow enters the air handling device through the first air inlet, passes through the second filter unit, and bypasses the first filter unit, forming an enhanced filtration mode for the second filter unit, improving its filtration efficiency. This allows the air handling device to include three filtration modes, thereby providing users with multiple filtration options. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the combined structure of the first filter unit in the first state and the air inlet switch assembly in the air handling device in an air filtration device provided in the embodiments of this application.

[0025] Figure 2 for Figure 1 Top view.

[0026] Figure 3 for Figure 1 A schematic diagram of the structure after removing the second filter unit.

[0027] Figure 4 This is a schematic diagram of the first angle of the first filter unit and the rotating component in a first state of an air filtration device provided in an embodiment of this application.

[0028] Figure 5 This is a schematic diagram of the second angle of the first filter unit and the rotating component in a first state of an air filtration device provided in an embodiment of this application.

[0029] Figure 6 This is a partial structural diagram of the first filter unit and rotating component combination in the first state of an air filtration device provided in an embodiment of this application.

[0030] Figure 7 for Figure 6 A magnified structural diagram at point A.

[0031] Figure 8 This is a schematic diagram of the structure of a first filter unit in a first state at a first angle, provided in an embodiment of this application.

[0032] Figure 9 This is a schematic diagram of the structure of a first filter unit in a first state in an air filtration device provided in an embodiment of this application, taken from a second angle.

[0033] Figure 10 This is a schematic diagram of the combined structure of the first filter unit in the air filtration device and the air intake switch assembly in the air handling device when the first filter unit is in the second state, as provided in the embodiments of this application.

[0034] Figure 11 for Figure 10 Top view.

[0035] Figure 12 for Figure 11 A magnified structural diagram at point B.

[0036] Figure 13 This is a partial structural diagram of the first filter unit and rotating component in the second state of an air filtration device provided in an embodiment of this application.

[0037] Figure 14 for Figure 13 A magnified structural diagram at point C.

[0038] Figure 15 This is a schematic diagram of the structure of a first filter unit in a second state in an air filtration device provided in an embodiment of this application, showing a first angle.

[0039] Figure 16This is a schematic diagram of the structure of a first filter unit in a second state in an air filtration device provided in an embodiment of this application, showing a second angle.

[0040] Figure 17 This is a schematic diagram of the combined structure of an air filtration device in which the first filter unit is in a first state and the air inlet channel of the air handling device is open, according to an embodiment of this application.

[0041] Figure 18 This is a schematic diagram of the structure of the air inlet switch assembly of an air handling device provided in the embodiment of this application, showing the first angle of the assembly combined with the first drive component when the air inlet channel is in the conducting state.

[0042] Figure 19 This is a schematic diagram of the structure of the air inlet switch assembly of an air handling device provided in the embodiment of this application, in which the air inlet channel is in the conducting state and combined with the first drive assembly at a second angle.

[0043] Figure 20 This is a schematic diagram of the structure of an air handling device provided in this application, showing the air inlet channel closed and combined with the first drive component at a first angle.

[0044] Figure 21 This is a schematic diagram of the structure of an air handling device provided in this application, showing the air inlet channel closed and combined with the first drive component at a second angle.

[0045] Figure 22 This is a schematic diagram of the base in the air inlet switch assembly of an air handling device provided in an embodiment of this application.

[0046] Figure 23 This is a schematic diagram of the combined structure of the shielding member and the second drive component in the air intake switch assembly of an air handling device provided in an embodiment of this application.

[0047] Figure 24 This is a partial structural schematic diagram of an air handling device provided in an embodiment of this application.

[0048] Figure 25 This is a schematic diagram of an air handling device provided in this application embodiment, in which the first filter unit is in a first state and the air inlet channel is closed after removing part of the housing.

[0049] Figure 26 This is a schematic diagram of the structure of an air handling device provided in this application embodiment, after removing part of the housing, with the first filter unit in a first state and the air inlet channel open.

[0050] Figure 27This is a schematic diagram of an air handling device provided in this application embodiment, in which the first filter unit is in a second state and the air inlet channel is closed after the housing is removed.

[0051] Explanation of reference numerals in the attached figures

[0052] 1. Air handling unit;

[0053] 100. Air filtration device;

[0054] 10. First drive assembly; 11. Rotating component; 110. Rotation center; 111. Guide part; 12. First drive component; 13. Rotating shaft; 14. Transmission component; 141. Driving wheel; 142. Driven wheel;

[0055] 20. First filter assembly; 21. First filter unit; 210. Slit; 21a. First end; 21b. Second end; 21c. Third end; 21d. Fourth end; 211. First filter; 212. First protrusion; 213. Second protrusion; 214. Frame; 22. Connector; 23. Support; 230. Receiving part; 231. Support part; 2311. Clearance part;

[0056] 30. Second filter assembly; 31. Second filter unit; 311. Support bracket;

[0057] 40. Air inlet switch assembly; 41. Base; 410. Air inlet channel; 411. Protrusion; 4110. Through hole; 412. Divider; 413. Socket; 42. Shielding component; 421. Base; 422. Shielding component; 423. First connecting part; 43. Second drive assembly; 431. Second drive component; 432. Drive rod; 433. Second connecting part; 434. Third connecting part; 44. First filter element; 45. Top cover; 46. Bottom cover;

[0058] 50. Housing; 51. First air inlet; 52. Second air inlet;

[0059] R, direction of rotation; X, first direction. Detailed Implementation

[0060] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0061] In this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0062] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" may explicitly include at least one of those features. In this application, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0063] In this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In this application, unless otherwise expressly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0065] This application provides an air filtration device 100 for filtering airflow entering an air handling unit 1. (Refer to...) Figures 1-2 as well as Figure 10 The air handling unit 100 includes: a first drive assembly 10, a first filter assembly 20, and a second filter assembly 30.

[0066] Reference Figures 1-2 as well as Figure 11 and Figure 13 The first drive assembly 10 includes a rotating member 11 capable of rotating about a first direction X, and the rotating member 11 has a rotation center 110. The rotation center 110 is the axis of rotation of the rotating member 11 about the first direction X, which is the axial direction of the axis. The rotating member 11 has a rotation direction R, and the rotating member 11 can rotate clockwise or counterclockwise about the first direction X.

[0067] Reference Figure 2 , Figure 4 as well as Figures 10-11 The first filter assembly 20 includes a plurality of first filter units 21, which are spaced apart on the rotating member 11 along the rotation direction R.

[0068] Reference Figure 1 , Figure 10 as well as Figure 17 The second filter assembly 30 includes a second filter unit 31, which surrounds the first filter unit 21 along the rotational direction R. (Refer to...) Figure 1 , Figure 10 as well as Figure 17 The second filter unit 31 includes a second filter (not shown in the figure) and a bracket 311 for supporting the second filter. The bracket 311 surrounds the first filter unit 21 in the rotation direction R, so that the second filter disposed on the bracket 311 surrounds the first filter unit 21, and the second filter unit 31 surrounds the first filter unit 21 in the rotation direction R.

[0069] The first filter unit 21 can rotate towards or away from the rotation center 110 under the drive of the rotating member 11, so as to switch between a first state and a second state. (Refer to...) Figures 1-9 The first filter unit 21 is in a first state, and multiple first filter units 21 are arranged sequentially along the rotation direction R to form a closed ring structure, so that the airflow entering the air handling unit 1 passes through the second filter unit 31 and the first filter unit 21. (Refer to...) Figures 10-16In the second state, two adjacent first filter units 21 are staggered and form a gap 210, so that the airflow entering the air handling device 1 passes through the second filter unit 31 and bypasses the first filter unit 21. The air filtration device 100 provided in this application embodiment arranges multiple first filter units 21 in the first filter assembly 20 on the rotating member 11 of the first drive assembly 10, and arranges the second filter units 31 in the second filter assembly 30 around the first filter unit 21 along the rotation direction R of the rotating member 11. That is, the second filter unit 31 is located outside the first filter unit 21, and the first filter unit 21 can rotate in a direction closer to or away from the rotation center 110 of the rotating member 11 under the drive of the rotating member 11, so that the first filter unit 21 switches between the first state and the second state. In the first state, multiple first filter units 21 are arranged sequentially along the rotation direction R to form a closed ring structure, so that the airflow entering the air handling unit 1 passes through the second filter unit 31 and the first filter unit 21, thereby realizing the dual filtration mode of the air filtration device 100 for the airflow entering the air handling unit 1. In the second state, two adjacent filter units along the rotation direction R are staggered and form a gap 210. The formation of the gap 210 can reduce the flow resistance of the first filter unit 21 to the airflow passing through the second filter unit 31, so that the airflow entering the air handling unit 1 passes through the second filter unit 31 and bypasses the first filter unit 21 through the gap 210, thereby increasing the airflow through the second filter unit 31, enhancing the filtration efficiency of the second filter unit 31 for pollutants in the airflow, and improving the CADR (clean air delivery rate) value, thereby forming the enhanced filtration mode of the second filter assembly 30 for the airflow entering the air handling unit 1. Thus, by rotating component 11 driving the first filter unit 21 to switch between the first state and the second state, the air filtration device 100 can switch between the dual filtration mode and the enhanced filtration mode of the second filter assembly, providing users with multiple filtration modes.

[0070] In this application embodiment, the meaning of "bypassing the first filter unit 21" can be understood as follows: most of the airflow passing through the second filter unit 31 enters the inner side of the annular structure formed by the multiple first filter units 21 along the rotation direction R through the gap 210, so as to bypass the first filter unit 21, rather than absolutely no airflow passing through the first filter unit 21.

[0071] In other words, when the first filter unit 21 is in the second state, the annular structure formed by multiple first filter units 21 along the rotation direction R is in a closed state, so that most of the airflow passing through the second filter unit 31 passes through the first filter unit 21; when the first filter unit 21 is in the second state, the formation of the gap 210 between two adjacent first filter units 21 makes the annular structure formed by multiple first filter units 21 along the rotation direction R open, so that most of the airflow passing through the second filter unit 31 enters the inner side of the annular structure through the gap 210, and a small part enters the inner side of the annular structure through the first filter unit 21.

[0072] In this application embodiment, the meaning of "multiple first filter units 21" can be understood as the number of first filter units 21 in the first filter assembly 20 being at least two.

[0073] In this embodiment, the phrase "airflow passes through the second filter unit 31 and the first filter unit 21" can be understood as the airflow entering the air handling device 1 passing through the second filter unit 31 and the first filter unit 21 in sequence. That is, since the second filter unit 31 is located outside the first filter unit 21, when the first filter unit 21 is in its first state, the airflow entering the air handling device first passes through the second filter unit 31 and then through the first filter unit 21.

[0074] Specifically, in some embodiments, there are two first filter units 21, and the cross-sectional shape of the first filter unit 21 can be arc-shaped, triangular, polygonal, etc. The first filter unit 21 is in a first state, and the two first filter units 21 are arranged sequentially along the rotation direction R and form a closed ring structure. The cross-sectional shape and number of the first filter units 21 are not limited here.

[0075] In some embodiments, the number of first filter units 21 is at least three, and the cross-sectional shape of the first filter unit 21 is square. The first filter unit 21 is in a first state, where at least three first filter units 21 are arranged sequentially along the rotation direction R and form a closed polygonal ring structure, such as a triangular ring structure, a quadrilateral ring structure, a pentagonal ring structure, etc. The specific choice can be made according to actual usage requirements, as long as the rotation of the rotating member 11 allows the first filter unit 21 to switch between the first state and the second state, and multiple first filter units 21 form a closed ring structure in the first state, while in the second state, adjacent first filter units 21 are staggered to form a gap 210. Specifically, as shown... Figure 2 and Figure 11In the embodiment shown, there are six first filter units 21. The first filter units 21 are in a first state. The six first filter units 21 are arranged sequentially along the rotation direction R and form a closed hexagonal ring structure.

[0076] In some embodiments, "majority of airflow" can be understood as accounting for 90% to 95% of the airflow passing through the second filter unit 31, and "minority of airflow" can be understood as accounting for 5% to 10% of the airflow passing through the second filter unit 31. In other embodiments, the proportions of "majority of airflow" and "minority of airflow" can be adjusted according to the rotation amplitude of the first filter unit 21.

[0077] In some embodiments, refer to Figure 2 and Figure 11 The rotating component 11 rotates clockwise, driving the first filter unit 21 to rotate closer to the rotation center 110, thus switching the first filter unit 21 from a first state to a second state. Conversely, rotating the rotating component 11 counterclockwise drives the first filter unit 21 to rotate away from the rotation center 110, thus switching the first filter unit 21 from a second state back to a first state. In other embodiments, the rotating component 11 can also be configured such that rotating counterclockwise switches the first filter unit 21 from the first state to the second state, and rotating clockwise switches the first filter unit 21 from the second state to the first state. It is sufficient that the rotation of the rotating component 11 causes the first filter unit 21 to switch between the first and second states.

[0078] In some embodiments, refer to Figure 2 and Figure 11 The rotating component 11 is in the shape of a disc. In other embodiments, the rotating component 11 may also be in the shape of a square disc or a disc of other shapes, as long as the rotation of the rotating component 11 causes the first filter unit 21 to switch between the first state and the second state. This application does not specifically limit the shape of the rotating component 11.

[0079] In some embodiments, refer to Figure 8 and Figure 15 The first filter unit 21 includes a first end 21a and a second end 21b disposed opposite to each other along the rotation direction R. (Refer to...) Figure 8When the first filter unit 21 is in the first state, in two adjacent first filter units 21 along the rotation direction R, the first end 21a of one first filter unit 21 is positioned opposite to the second end 21b of the other first filter unit 21, so that multiple first filter units 21 are arranged sequentially along the rotation direction R to form a closed ring structure, ensuring the filtration effect of the first filter unit 21 on the airflow passing through the second filter unit 31, and ensuring the filtration effect of the dual filtration mode of the second filter unit 31 and the first filter unit 21 on the airflow.

[0080] In some embodiments, refer to Figure 8 and Figure 15 The first filter unit 21 includes a first filter 211 for filtering pollutants in the airflow. (See reference...) Figure 15 In the second state, the first filter unit 21 is positioned such that, in two adjacent first filter units 21 along the rotation direction R, the first end 21a of one first filter unit 21 and the first filter 211 of the other first filter unit 21 are positioned opposite each other and spaced apart, forming a gap 210 between the opposing surfaces of the first end 21a and the first filter 211. This arrangement of adjacent first filter units 21 in the second state ensures that the airflow passing through the second filter unit 31 bypasses the first filter unit 21 through the gap 210, achieving an enhanced filtration mode for the second filter unit 31 and improving its filtration efficiency.

[0081] In some embodiments, refer to Figure 12 Along the rotation direction R, in two adjacent first filter units 21, the distance between the first end 21a of one first filter unit 21 and the opposite surface of the first filter 211 of the other first filter unit 21 is L mm, and the value of L decreases from the end closer to the rotation center 110 to the end farther away from the rotation center 110. This structural design, where the distance L between the first end 21a and the opposite surface of the first filter 211 increases from the end farther away from the rotation center 110 to the end closer to the rotation center 110, can amplify the airflow through the gap 210, thereby increasing the airflow velocity entering the inner side of the annular structure through the gap 210, increasing the airflow rate through the second filter unit 31, realizing the enhanced filtration mode of the second filter unit 31, and improving the filtration efficiency of the second filter unit 31.

[0082] In some embodiments, refer to Figure 2 and Figure 10 The first filter assembly 20 also includes a connector 22, which is annular in shape and is disposed on the side of the first filter unit 21 opposite to the rotating member 11 along the first direction X. (Refer to...) Figure 8 and Figure 15 The first filter unit 21 includes a third end 21c and a fourth end 21d disposed opposite to each other along the first direction X, as shown in the figure. Figure 3 The third end 21c is rotatably connected to the connector 22, as shown in the reference. Figure 6 The fourth end 21d is connected to the rotating member 11. During rotation, the rotating member 11 can drive the fourth end 21d to move, allowing the first filter unit 21 to rotate towards or away from the rotation center 110. The connecting member 22, in conjunction with the rotating member 11, can limit and clamp the first filter unit 21 along the first direction X, ensuring the installation stability of the first filter unit 21 in the first direction X and ensuring the rotational stability of the first filter unit 21.

[0083] In some embodiments, refer to Figure 6 The first filter unit 21 also includes a first protrusion 212 protruding from the third end 21c and a second protrusion 213 protruding from the fourth end 21d. (See reference...) Figure 3 The third end 21c is rotatably connected to the connector 22 via the first protrusion 212, as shown in the reference. Figure 6 The fourth end 21d is connected to the rotating member 11 via the second protrusion 213. (Refer to...) Figure 6 and Figure 13 During rotation, the rotating component 11 can drive the second protrusion 213 to move closer to or further away from the rotation center 110, so that the first filter unit 21 can rotate about the first protrusion 212 as an axis closer to or further away from the rotation center 110. Specifically, refer to... Figure 6 The second protrusion 213 is located away from the rotation center 110, as shown in the reference. Figure 13 The second protrusion 213 moves to a position close to the rotation center 110. The first protrusion 212 ensures the stability of the connection between the first filter unit 21 and the connector 22, while also allowing the first filter unit 21 to rotate about the first protrusion 212 as an axis, ensuring the rotational stability of the first filter unit 21, and thus ensuring the stability of the first filter unit 21 when switching between the first and second states. The second protrusion 213 ensures the stability of the connection between the rotating member 11 and the first filter unit 21, and ensures the stability of the first filter unit 21 when rotating towards or away from the rotation center 110.

[0084] In some embodiments, refer to Figure 8 The first filter unit 21 also includes a frame 214, with the first filter 211 connected within the frame 214. The first end 21a, the fourth end 21d, the second end 21b, and the third end 21c are sequentially connected end-to-end to form the frame 214. The frame 214 ensures the installation stability of the first filter 211 and its operational stability.

[0085] In some embodiments, the frame 214 includes a first part and a second part, which are joined and assembled along the thickness direction of the first filter screen 211 to form the frame 214, making the frame 214 detachable. This facilitates the assembly and disassembly of the first filter screen 211 and the frame 214, making it easier to replace and maintain the first filter screen 211 and ensuring the filtration effect. In other embodiments, the first filter screen 211 and the frame 214 may also be configured as an integral structure, depending on the actual usage requirements.

[0086] In some embodiments, refer to Figure 7 and Figure 14 A guide portion 111 is formed on the rotating member 11, extending from the edge of the rotating member 11 towards the rotation center 110 of the rotating member 11. A second protrusion 213 is connected to the guide portion 111. During rotation, the rotating member 11 pulls the second protrusion 213 along the guide portion 111, causing the second protrusion 213 to move closer to or further away from the rotation center, thus switching the first filter unit 21 between a first state and a second state. (Refer to...) Figure 2 The second protrusion 213 is located at the end of the guide portion 111 away from the rotation center 110, and the first filter unit 21 is in the first state; refer to Figure 11 The second protrusion 213 is located at the end of the guide portion 111 near the rotation center 110, and the first filter unit 21 is in the second state. The guide portion 111 can guide and limit the movement of the second protrusion 213 on the rotating member 11, thereby ensuring the stability of the movement of the second protrusion 213 towards or away from the rotation center 110, ensuring the accuracy of the second protrusion 213 in place, and ensuring the stability and accuracy of the first filter unit 21 in switching between the first state and the second state.

[0087] In some embodiments, refer to Figure 2 and Figure 11 Along the rotation direction R, the first protrusion 212 and the second protrusion 213 are spaced apart. The first protrusion 212 and the second protrusion 213 are spaced apart along the rotation direction R, so that the first protrusion 212 and the second protrusion 213 are not coaxial. Thus, when the rotating member 11 rotates, it drives the second protrusion 213 to move. The first filter unit 21 rotates about the first protrusion 212 as an axis. When the first filter unit 21 is in the second state, it can ensure that two adjacent first filter units 21 are staggered and form a gap 210, thereby reducing the flow resistance of the first filter unit 21 to the airflow passing through the second filter unit 31 and improving the filtration efficiency of the second filter unit 31.

[0088] In some embodiments, refer to Figure 8 and Figure 15The first protrusion 212 is adjacent to the second end 21b, and the second protrusion 213 is adjacent to the first end 21a. This allows the distance L between the opposing surfaces of the first end 21a of one first filter unit 21 and the first filter 211 of the other first filter unit 21 to decrease from the end closer to the rotation center 110 to the end farther from the rotation center 110, ensuring the amplification of the airflow passing through the gap 210 and improving the filtration efficiency of the second filter unit 31.

[0089] In some embodiments, refer to Figure 2 and Figure 11 The guide part 111 is a guide groove, and the second protrusion 213 is inserted into the guide part 111 to ensure the connection stability between the second protrusion 213 and the rotating part 11.

[0090] In some embodiments, the guide portion 111 is a guide hole.

[0091] In some embodiments, refer to Figure 2 and Figure 11 The cross-sectional shape of the guide portion 111 includes an arc shape. The arc-shaped structural design of the guide portion 111 ensures smooth movement of the second protrusion 213 within the guide portion 111, and the arc of the guide portion 111 corresponds to the rotation arc of the first filter unit 21, ensuring smooth switching of the first filter unit 21 between the first and second states. In other embodiments, the cross-sectional shape of the guide portion 111 can also be straight or other shapes, depending on the application requirements. The key is to ensure that the first filter unit 21 can rotate towards or away from the rotation center under the drive of the rotating member 11 to switch between the first and second states.

[0092] In some embodiments, refer to Figures 3-6 as well as Figure 13 The first filter assembly 20 also includes a support member 23, which is in the shape of a tube, as shown in the figure. Figure 3 and Figure 13 The rotating member 11 and the connecting member 22 are respectively disposed at opposite ends of the support member 23 along the first direction X. (Refer to...) Figure 6 and Figure 13The support member 23 has a through-wall receiving portion 230 formed on its side wall, and the first filter unit 21 is rotatably disposed in the receiving portion 230. The support member 23 improves the installation stability and strength of the first filter assembly 20, and ensures the connection stability between the first filter unit 21, the connector 22, and the rotating member 11. It also ensures the sealing between adjacent first filter units 21 when the first filter unit 21 is in its first state, reducing the possibility of airflow passing through the second filter unit 31 passing through the gap between adjacent first filter units 21, thus ensuring the filtration effect of the first filter unit 21 and the second filter unit 31 forming a dual filtration mode.

[0093] In some embodiments, refer to Figures 3-7 as well as Figure 13 The support member 23 includes a support portion 231 extending along a first direction X. The number of support portions 231 is plurality of, and they are spaced apart along the rotation direction R. A receiving portion 230 is defined between two adjacent support portions 231. (Refer to...) Figure 4 The support portion 231 has a recessed clearance portion 2311 on the side facing the rotation center 110, and the first protrusion portion 212 protrudes from the end of the third end 21c adjacent to the first end 21a along the rotation direction R. The formation of the clearance portion 2311 can prevent the support portion 231 from interfering with the first protrusion portion 212 when the first filter unit 21 is in the second state, thereby ensuring the stability and smoothness of the rotation of the first filter unit 21 about the second protrusion portion 212 as an axis, and ensuring the stability and smoothness of the switching of the first filter unit 21 between the first state and the second state.

[0094] In some embodiments, refer to Figure 19 The first drive assembly 10 also includes a first drive element 12 and a rotating shaft 13, as shown in the figure. Figure 2 The rotating component 11 is sleeved on the rotating shaft 13, and the first direction X is the axial direction of the rotating shaft 13. (Refer to...) Figure 19 The first driving component 12 is connected to the rotating shaft 13, and the first driving component 12 drives the rotating component 11 to rotate through the rotating shaft 13. The structural design of the first driving component 12 being directly connected to the rotating shaft 13 to drive the rotating component 11 to rotate can ensure the driving stability of the first driving component 12 and the stability of the rotating component 11 driving the first filter unit 21 to switch between the first state and the second state.

[0095] In some embodiments, refer to Figure 19The first drive assembly 10 also includes a transmission component 14, which is connected to the rotating shaft 13. The first drive component 12 drives the rotating shaft 13 to rotate through the transmission component 14, and the rotating shaft 13 drives the rotating component 11 to rotate. The transmission component 14 forms an indirect drive of the rotating shaft 13 by the first drive component 12, which can reduce the energy consumption of the first drive component 12 and reduce the cost of use.

[0096] In some embodiments, refer to Figure 19 The transmission component 14 includes a driving wheel 141 and a driven wheel 142. The driving wheel 141 is connected to the first driving component 12, and the driven wheel 142 is sleeved on the rotating shaft 13 and meshes with the driving wheel 141. The driven wheel 142 is fan-shaped. (Refer to...) Figure 1 and Figure 17 The first filter unit 21 is in the first state, as shown in the reference. Figure 19 The driving gear 141 meshes with one end of the tooth surface of the driven gear 142 in the extending direction. (Refer to...) Figure 10 The first filter unit 21 is in the second state, as shown in the reference. Figure 20 The driving gear 141 meshes with the other end of the tooth surface of the driven gear 142 in the extension direction. The design of the driving gear 141 and the driven gear 142 makes the first driving member 12 indirectly drive the rotating shaft 13 through the driving gear 141 and the driven gear 142.

[0097] The sector-shaped design of the driven wheel 142 allows for the limitation and control of the rotation amplitude of the rotating component 11 via the rotating shaft 13. Specifically, refer to... Figure 19 The first driving member 12 drives the driving wheel 141 to rotate until it meshes with one end of the tooth surface of the driven wheel 142 in the extending direction, as shown in the reference. Figure 6 The second protrusion 213 is located at the end of the guide portion 111 away from the rotation center 110, and the first filter unit 21 is in the first state. (Refer to...) Figure 20 The first driving member drives the driving wheel 141 to rotate until it meshes with the other end of the tooth surface of the driven wheel 142 in the direction of its extension. (Refer to...) Figure 13 The second protrusion 213 is located at the end of the guide portion 111 near the rotation center 110. This improves the accuracy of the first filter unit 21 in switching between the first state and the second state.

[0098] In some other implementations, the transmission component 14 can adopt a rotating arm structure, that is, the first driving component 12 drives the rotating shaft 13 to rotate through the rotating arm. The specific choice can be made according to the actual use requirements, as long as it satisfies the function of driving the rotating shaft 13 to drive the rotating component 11 to rotate (including clockwise rotation and counterclockwise rotation).

[0099] In some embodiments, the first drive element 12 is a stepper motor. In other embodiments, the first drive element 12 can be other types of motors, as long as they satisfy the function of driving the rotating shaft 13 to rotate.

[0100] In some embodiments, the air filtration device 100 further includes a sensor (not shown) disposed on one side of the first filter unit 21, with the sensor's probe facing the first filter unit, to detect whether the first filter unit 21 is in a first state or a second state. The sensor can be a position sensor or other types of sensors, depending on actual usage requirements, as long as it can fulfill the function of detecting whether the first filter unit 21 is in the first state or the second state.

[0101] In some embodiments, the first filter unit 21 is used to filter one of formaldehyde and particulate matter in the airflow. Specifically, the first filter 211 in the first filter unit 21 is used to filter one of formaldehyde and particulate matter in the airflow. The second filter unit 31 is used to filter the other of formaldehyde and particulate matter in the airflow. Specifically, the first filter 211 in the first filter unit 21 is used to filter the other of formaldehyde and particulate matter in the airflow.

[0102] For example, the first filter unit 21 is used to filter formaldehyde, and the second filter unit 31 is used to filter particulate matter. When the first filter unit 21 is in the first state, the air filtration device 100 forms a dual filtration mode for particulate matter and formaldehyde. When the first filter unit 21 is in the second state, the air filtration device 100 forms an enhanced filtration mode for particulate matter, thereby improving the filtration efficiency of the second filter unit 31 for particulate matter.

[0103] In some embodiments, the first filter 211 is a high-efficiency particulate air (HEPA) filter, and the second filter is a formaldehyde filter.

[0104] In some embodiments, the first filter 211 is a formaldehyde filter, and the second filter is a HEPA filter.

[0105] In some embodiments, this application also provides an air handling device 1, referring to Figures 24-27 The air handling unit 1 includes a housing 50, an air filter 100 as described above, and an air inlet switch assembly 40.

[0106] Reference Figure 24The housing 50 is provided with a first air inlet 51, a second air inlet 52, and an air outlet (not shown in the figure). The first air inlet 51 and the air outlet are connected to each other, and the second air inlet 52 is configured to communicate with the air outlet. The first air inlet 51 and the second air inlet 52 are spaced apart along a first direction X. The first air inlet 51 is located on the side wall of the housing 50 opposite to the second filter assembly 30. The air filter device 100 is disposed inside the housing 50.

[0107] Reference Figure 1 , Figure 10 and Figure 17 The air intake switch assembly 40 includes a base 41 and a shield 42.

[0108] The base 41 is disposed on the side of the rotating member 11 opposite to the first filter assembly 20 along the first direction X, as shown in the figure. Figure 17 The base 41 and the second filter assembly 30 are spaced apart to define an air inlet channel 410. Specifically, the second filter unit 31 in the second filter assembly 30 surrounds the first filter unit 21 along the rotation direction R, and there is a gap between the second filter unit 31 and the first filter unit 21, and the air inlet channel 410 communicates with the gap.

[0109] A shielding member 42 is disposed on the base 41 and located at the air inlet channel 410. A second air inlet 52 is formed on the side wall of the housing 50, which is opposite to the air inlet switch assembly 40. The air inlet end of the air inlet channel 410 faces the second air inlet 52. The shielding member 42 is disposed between the air inlet channel 410 and the second air inlet 52. The shielding member 42 can move along the first direction X to open or close the air inlet channel 410. Specifically, it can open the air inlet channel 410 and the second air inlet 52, or close the air inlet channel 410 and the second air inlet 52.

[0110] Reference Figures 18-21 The shielding member 42 is movable along the first direction X to open or close the air intake passage 410. When the air intake passage 410 is open, the airflow entering the air handling unit 1 bypasses the second filter unit 31 and enters the first filter unit 21 via the air intake passage 410. When the air intake passage 410 is closed, the airflow entering the air handling unit 1 passes sequentially through the second filter unit 31 and the first filter unit 21.

[0111] When the circuit is open, the airflow passes through the air inlet channel 410, bypasses the second filter unit 31, and enters the first filter unit 21. Specifically, the airflow enters the air inlet channel 410 through the second air inlet 52 and bypasses the second filter unit 31 to enter the first filter unit 21. When the circuit is closed, the airflow passes through the second filter unit 31 and the first filter unit 21. Specifically, the airflow that enters the inside of the housing 50 through the first air inlet 51 passes through the second filter unit 31 and the first filter unit 21 in sequence.

[0112] The blocking member 42 in the air inlet switch assembly 40 can control the opening or closing of the air inlet channel 410 by moving the blocking member 42 along the first direction X. Combined with the control of the rotation of the rotating member 11 to switch the first filter unit 21 between the first and second states, the air filtration device 100 can further increase the types of filtration modes for the airflow entering the air handling device 1. The air handling device 1 also includes an airflow generating assembly (not shown in the figure), which includes a fan and a motor. The fan is located on the side of the first filter unit 21 away from the rotating member 11 along the first direction X, and the motor is located on the side of the fan away from the first filter unit 21 along the first direction X. The motor drives the fan to rotate so as to draw the airflow from the outer periphery of the air handling device 1 into the inner side of the housing 50 from the side wall of the housing 50, thereby filtering the airflow entering the inner side of the air handling device 1.

[0113] The air handling device 1 provided in this application embodiment, by setting an air inlet switch assembly 40, in which a shielding member 42 is provided, controls the opening or closing of the air inlet channel 410 and the second air inlet 52 by moving the shielding member 42 along the first direction X. Combined with the control of the rotation of the rotating member 11 in the air filter device 100 to control the switching of the first filter unit 21 between the first state and the second state, the types of filtration modes for the airflow entering the air handling device 1 are increased.

[0114] In some embodiments, refer to Figure 25 When the first filter unit 21 is in the first state and the second air inlet 52 and the air inlet channel 410 are closed by the shield 32, the airflow enters the air handling device 1 through the first air inlet 51 and passes through the second filter unit 31 and the first filter unit 21 in sequence, and is then discharged from the air outlet, thus realizing a dual filtration mode for the airflow.

[0115] In some embodiments, refer to Figure 26 The first filter unit 21 is in the first state, and the second air inlet 52 is connected to the air inlet channel 410. The airflow enters the air inlet channel 410 through the second air inlet 52, bypasses the second filter unit 31, enters the first filter unit 21, and is then discharged from the air outlet. Since the resistance at the air inlet channel 410 is less than the resistance at the side wall of the housing 50 where the first air inlet 51 is located, most of the airflow enters the air inlet channel 410 through the second air inlet 52, and directly enters the gap between the first filter unit 21 and the second filter unit 31 through the air inlet channel 410 and passes through the first filter unit 21. That is, the airflow bypasses the second filter unit 31 and directly passes through the first filter unit 21, which increases the airflow through the first filter unit 21, realizes the enhanced filtration mode of the first filter unit 21, and improves the filtration efficiency of the first filter unit 21.

[0116] In some embodiments, refer to Figure 27 With the first filter unit 21 in its second state and the second air inlet 52 and air inlet channel 410 closed by the shielding member 42, the airflow entering the air handling unit 1 through the first air inlet 51 passes through the second filter unit 31, bypasses the first filter unit 21, and is then discharged from the air outlet. Because the first filter unit 21 is in its second state, the formation of the gap 210 between two adjacent first filter units 21 allows most of the airflow passing through the second filter unit 31 to bypass it, with only a small portion passing through. This reduces the resistance of the first filter unit 21 to the airflow, increasing the airflow through the second filter unit 31 and achieving an enhanced filtration mode, thus improving the filtration efficiency of the second filter unit 31.

[0117] Therefore, the air intake switch assembly 40 enables the air filter device 100 to include three filtration modes: a dual filtration mode, an enhanced filtration mode of the first filter unit 21, and an enhanced filtration mode of the second filter unit 31, providing users with multiple filtration modes.

[0118] In some embodiments, the first filter unit 21 is used to filter one of formaldehyde and particulate matter in the airflow. Specifically, the first filter 211 in the first filter unit 21 is used to filter one of formaldehyde and particulate matter in the airflow. The second filter unit 31 is used to filter the other of formaldehyde and particulate matter in the airflow. Specifically, the first filter 211 in the first filter unit 21 is used to filter the other of formaldehyde and particulate matter in the airflow.

[0119] Taking the first filter unit 21 used to filter formaldehyde and the second filter unit 31 used to filter particulate matter as an example, the different filtration modes of the air handling device 1 are explained as follows:

[0120] In dual filtration mode, it can filter both particulate matter and formaldehyde.

[0121] In the enhanced filtration mode of the first filter unit 21, an enhanced filtration mode for formaldehyde can be formed, thereby increasing the CADR (clean air delivery rate) value of the air handling unit 1 for formaldehyde.

[0122] In the enhanced filtration mode of the second filter unit 31, an enhanced filtration mode for particulate matter can be formed, thereby increasing the CADR (Clean Air Delivery Rate) value of the air handling unit 1 for particulate matter.

[0123] In some embodiments, refer to Figure 22The base 41 protrudes along the first direction X toward the rotating member 11 to form a protrusion 411. The protrusion 411 is located inside the second filter assembly 30, and a through hole 4110 is formed on the protrusion 411 along the first direction X. (Refer to...) Figure 19 and Figure 21 The rotating shaft 13 is inserted into the through hole 4110, and the rotating component 11 is sleeved on the end of the rotating shaft 13 located outside the protrusion 411. The first driving component 12 and the transmission component 14 in the first driving assembly 10 are located inside the base 41. The first driving component 12 is connected to the end of the rotating shaft 13 located inside the base 41 through the transmission component 14 to drive the rotating shaft 13 to rotate. By setting the first driving component 12 and the transmission component 14 inside the base 41, the space utilization rate can be improved while driving the rotating component 11 to rotate.

[0124] In some embodiments, refer to Figure 19 and Figure 21 The transmission component 14 includes a driving wheel 141 and a driven wheel 142, both of which are located inside the base 41.

[0125] In some embodiments, refer to Figure 1 The shield 42 moves along the first direction X until it abuts against the second filter unit 31, closing the air inlet channel 410. (Refer to...) Figure 10 The shield 42 moves away from the second filter unit 31 along the first direction X, and the air inlet channel 410 is opened.

[0126] In some embodiments, refer to Figure 19 The air intake switch assembly 40 also includes a second drive assembly 43, as shown in the reference. Figure 23 The second drive assembly 43 includes a second drive member 431, which is connected to the shielding member 42 to drive the shielding member 42 to move along the first direction X. Specifically, the second drive member 431 drives the shielding member 42 to move closer to or further away from the second filter unit 31 along the first direction X. The second drive member 431 ensures the accuracy of controlling the movement of the shielding member 42 along the first direction X, ensuring that the air inlet channel 410 can be stably in a conducting or closed state.

[0127] In some embodiments, refer to Figure 21 and Figure 23The second drive assembly 43 further includes a drive rod 432, a second connecting portion 433, and a third connecting portion 434. The second connecting portion 433 is disposed inside the base 41 and connected to the inner wall of the base 41. The drive rod 432 extends along the first direction X. One end of the drive rod 432 is connected to the second drive member 431, and the other end is inserted into the second connecting portion 433. The third connecting portion 434 is sleeved on the drive rod 432 and connected to the blocking member 42. The second drive member 431 can drive the drive rod 432 to rotate. The rotation of the drive rod 432 drives the third connecting portion 434 to move along the first direction X. The third connecting portion 434 drives the blocking member 42 to move along the first direction X.

[0128] In some embodiments, the drive rod 432 is a screw or lead screw, and the third connecting part 434 is threadedly connected to the drive rod 432 so that the third connecting part 434 can be moved along the first direction X by the rotation of the drive rod 432.

[0129] In some embodiments, refer to Figure 23 The shielding member 42 includes a base 421, a shielding portion 422, and a first connecting portion 423. The base 421 and the shielding portion 422 are sequentially connected along a first direction X. The first connecting portion 423 is internally connected to the base 421. The first connecting portion 423 and a third connecting portion 434 are stacked and connected along the first direction X. The third connecting portion 434 drives the shielding member 42 to move along the first direction X through the first connecting portion 423. The shielding member 42 forms the opening or closing of the air inlet channel 410 through the shielding portion 422.

[0130] In some embodiments, refer to Figures 18-21 The air intake switch assembly 40 also includes a first filter element 44, which surrounds the shield 42 along the rotation direction R. The filter element 44 is located at the air intake channel 410 and is used to filter the airflow entering the air intake channel 410. The arrangement of the first filter element 44 can form a preliminary filtration of the airflow entering the air intake channel 410, thereby improving the filtration effect of the air filter device 100.

[0131] In some embodiments, refer to Figure 20 The air inlet switch assembly 40 also includes a top cover 45, which is mounted on the side of the base 41 facing the rotating member 11 along the first direction X. The top cover 45 surrounds the protrusion 411 along the rotation direction R, and abuts against the bracket 311 in the second filter assembly 30 along the first direction X. When the blocking member 42 moves along the first direction X to abut against the top cover 45, the air inlet channel 410 is closed. When the blocking member 42 moves away from the top cover 45 along the first direction X, the air inlet channel 410 is opened.

[0132] In some embodiments, refer to Figure 22The base 41 has an inlet 413 that runs through the base 41 along the first direction X. The shield 42 is inserted into the inlet 413. Specifically, the shielding part 422 of the shield 42 is inserted into the inlet 413. The shield 42 extends out of the inlet 413 or retracts to the inside of the base 41 along the first direction X, thereby closing or opening the air inlet channel 410.

[0133] In some embodiments, the first filter element 44 is a HEPA filter or a pre-filter.

[0134] In some embodiments, a mounting portion (not shown in the figure) is formed on the shielding member 42, and a second filter element (not shown in the figure) for filtering airflow is connected inside the mounting portion. The second filter element is provided on the shielding member 42 so that the second filter element moves with the shielding member 42 along the first direction X, thereby filtering the airflow.

[0135] In some embodiments, the base 41 has two protruding partitions 412 on the side facing the rotating member 11 along the first direction X. These partitions 412 are respectively located on opposite sides of the protrusion 411, thereby dividing the air inlet channel 410 into two spaced-apart sections along the rotation direction R. Correspondingly, the shielding member 42 has two shielding portions 422 and two first filter elements 44, corresponding to the number of air inlet channels 410. In other embodiments, the number of partitions 412 can be selected according to actual usage requirements, thus providing a corresponding number of shielding portions 422 and first filter elements 44.

[0136] In some embodiments, refer to Figure 18 and Figure 20 The air intake switch assembly 40 also includes a bottom cover 46, which covers one end of the base 41 away from the second filter assembly 30 along the first direction X. The bottom cover 46 is used to seal the inner space of the base 41 to ensure airtightness.

[0137] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. An air filtration device, characterized in that, The air filtration device is used to filter airflow entering the air handling unit, the air filtration device comprising: The first drive assembly includes a rotating component capable of rotating about a first direction, the rotating component having a rotation center; The first filter assembly includes a plurality of first filter units, which are spaced apart on the rotating member along the rotation direction of the rotating member; The second filter assembly includes a second filter unit surrounding the first filter unit along the rotation direction; The first filter unit can rotate towards or away from the rotation center under the drive of the rotating component, so as to switch between a first state and a second state. The first filter unit is in the first state, and the plurality of first filter units are arranged sequentially along the rotation direction to form a closed ring structure, so that the airflow entering the air handling device passes through the second filter unit and the first filter unit; The first filter unit is in the second state, and two adjacent first filter units are staggered and form a gap so that the airflow entering the air handling device passes through the second filter unit and bypasses the first filter unit.

2. The air filtration device according to claim 1, characterized in that, The first filter unit includes a first end and a second end that are disposed opposite to each other along the rotation direction; When the first filter unit is in the first state, in two adjacent first filter units along the rotation direction, the first end of one first filter unit is positioned opposite to the second end of the other first filter unit.

3. The air filtration device according to claim 2, characterized in that, The first filter unit includes a first filter for filtering pollutants in the airflow; When the first filter unit is in the second state, in two adjacent first filter units along the rotation direction, the first end of one first filter unit and the first filter of the other first filter unit are opposite to each other and spaced apart, so as to form the gap between the first end and the opposite surface of the first filter.

4. The air filtration device according to claim 3, characterized in that, Along the direction of rotation, the distance between the opposite surfaces of the first end and the first filter screen is L mm, and the value of L decreases from the end closer to the center of rotation to the end farther away from the center of rotation.

5. The air filtration device according to claim 2, characterized in that, The first filter assembly further includes a connector disposed on the side of the first filter unit opposite to the rotating member along the first direction; The first filter unit includes a third end and a fourth end disposed opposite to each other along the first direction, the third end being rotatably connected to the connector, and the fourth end being connected to the rotating member; During rotation, the rotating component can drive the fourth end to move, so that the first filter unit can rotate in a direction closer to or further away from the rotation center.

6. The air filtration device according to claim 5, characterized in that, The first filter unit further includes a first protrusion protruding from the third end and a second protrusion protruding from the fourth end; The third end is rotatably connected to the connector via the first protrusion, and the fourth end is connected to the rotating member via the second protrusion; During rotation, the rotating component can drive the second protrusion to move closer to or further away from the rotation center, so that the first filter unit can rotate with the first protrusion as the axis to move closer to or further away from the rotation center.

7. The air filtration device according to claim 6, characterized in that, A guide portion is formed on the rotating component, and the guide portion extends from the edge of the rotating component toward the rotation center; The second protrusion is connected to the guide portion. During the rotation process, the rotating member drives the second protrusion to move along the guide portion, so that the second protrusion moves closer to or further away from the rotation center.

8. The air filtration device according to claim 7, characterized in that, Along the rotation direction, the first protrusion and the second protrusion are spaced apart; The first protrusion is adjacent to the second end, and the second protrusion is adjacent to the first end.

9. The air filtration device according to claim 7, characterized in that, The guide portion is a guide groove or a guide hole, and the cross-sectional shape of the guide portion includes an arc shape.

10. The air filtration device according to claim 5, characterized in that, The first filter assembly further includes a support member in the shape of a tube, and the rotating member and the connecting member are respectively disposed at opposite ends of the support member along the first direction; The support member has a receiving portion that extends through the side wall, and the first filter unit is rotatably disposed in the receiving portion.

11. The air filtration device according to any one of claims 1 to 10, characterized in that, The number of the first filter units is at least three, and the cross-sectional shape of the first filter unit is square; The first filter unit is in the first state, and the at least three first filter units are arranged sequentially along the rotation direction and form a polygonal ring structure.

12. The air filtration device according to claim 1, characterized in that, The first drive assembly further includes a first drive element and a rotating shaft; The rotating component is sleeved on the rotating shaft, and the first driving component is connected to the rotating shaft. The first driving component drives the rotating component to rotate through the rotating shaft.

13. The air filtration device according to claim 12, characterized in that, The first drive assembly further includes a transmission component, which is connected to the rotating shaft; The first driving member drives the rotating shaft to rotate via the transmission member, and the rotating shaft drives the rotating member to rotate.

14. The air filtration device according to claim 13, characterized in that, The transmission component includes a driving wheel and a driven wheel. The driving wheel is connected to the first driving component, and the driven wheel is sleeved on the rotating shaft and meshes with the driving wheel. The driven wheel is fan-shaped. The first filter unit is in the first state, and the driving wheel meshes with one end of the tooth surface of the driven wheel in the extension direction; The first filter unit is in the second state, and the driving wheel meshes with the other end of the tooth surface of the driven wheel in the extension direction.

15. An air handling device, characterized in that, The air handling unit includes: The housing includes a first air inlet, a second air inlet, and an air outlet, wherein the first air inlet and the air outlet are interconnected, and the second air inlet is configured to communicate with the air outlet; and The air filtration device as described in any one of claims 1 to 14, wherein the air filtration device is disposed inside the housing; The air filtration device further includes an air inlet switch assembly, which includes: A base is disposed on the side of the rotating member opposite to the first filter assembly along a first direction, and the base and the second filter assembly are spaced apart from each other to define an air inlet channel; A shielding member is disposed on the base and located at the air inlet channel, wherein the air inlet end of the air inlet channel faces the second air inlet, the shielding member is disposed between the air inlet channel and the second air inlet, and the shielding member can move along the first direction to open or close the air inlet channel. When the circuit is open, the airflow bypasses the second filter unit and enters the first filter unit through the air inlet channel; when the circuit is closed, the airflow passes through the second filter unit and the first filter unit.

16. The air handling apparatus according to claim 15, characterized in that, When the shield moves along the first direction to abut against the second filter unit, the air inlet channel is closed; when the shield moves away from the second filter unit along the first direction, the air inlet channel is opened.

17. The air handling apparatus according to claim 15, characterized in that, The air intake switch assembly further includes a second drive assembly disposed on the base, including a second drive member. The second drive member is connected to the shield to drive the shield to move along the first direction.

18. The air handling apparatus according to claim 15, characterized in that, When the first filter unit is in the first state and the second air inlet and the air inlet channel are closed, the airflow enters the air handling device through the first air inlet and passes through the second filter unit and the first filter unit, and is then discharged through the air outlet. The first filter unit is in the first state and the second air inlet is connected to the air inlet channel. The airflow enters the air inlet channel through the second air inlet and bypasses the second filter unit to enter the first filter unit, and then is discharged from the air outlet. When the first filter unit is in the second state and the second air inlet and the air inlet channel are closed, the airflow enters the air handling device through the first air inlet, passes through the second filter unit and bypasses the first filter unit, and is then discharged through the air outlet.

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