Air purifier

Abstract

The application relates to an air purifier which comprises a shell, a first air duct and a second air duct arranged in the shell, and an air inlet communicated with the first air duct and an air outlet communicated with the second air duct; a first filter element arranged in the first air duct; and a second filter element arranged in the second air duct; wherein the air purifier has a first mode and a second mode; when the air purifier is in the first mode, the first air duct is communicated with the air outlet, and the first air duct is separated from the second air duct; when the air purifier is in the second mode, the first air duct is communicated with the second air duct, and the second air duct is communicated with the air outlet. The air purifier has a clever structure, two purification modes, i.e. the first mode and the second mode, are provided, different degrees of air purification are realized in the two modes, and users can switch the purification modes according to actual needs, so that the use requirements are met.

Description

Technical Field

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

[0002] An air purifier is a product that can adsorb, decompose, or transform various air pollutants (generally including PM2.5, dust, pollen, odors, formaldehyde and other decoration pollution, bacteria, allergens, etc.) to effectively improve air cleanliness. Its working principle is generally that the filter element intercepts pollutants in the air that are larger than the diameter of the filter element mesh, thereby filtering the pollutants in the air and achieving the purification function.

[0003] Currently, air purifiers on the market have a simple structure and cannot be customized to meet users' specific needs for pollutant purification functions. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application provides an air purifier with an ingenious structure that can provide a variety of purification functions to suit the user's actual needs.

[0005] This application provides an air purifier, which includes:

[0006] The housing has a first air duct and a second air duct inside, and each has an air inlet connected to the first air duct and an air outlet connected to the second air duct.

[0007] The first filter element is located in the first air duct;

[0008] The second filter element is located in the second air duct;

[0009] The air purifier has a primary mode and a secondary mode. When the air purifier is in the primary mode, the first air duct is connected to the air outlet and is isolated from the second air duct. When the air purifier is in the secondary mode, the first air duct is connected to the second air duct and is connected to the air outlet through the second air duct.

[0010] In some embodiments, the pore size of the first filter element is larger than the pore size of the second filter element.

[0011] In some embodiments, the housing is further provided with a side air vent for connecting the first air duct and the second air duct, and the side air vent intersects with the first air duct.

[0012] In some embodiments, the housing is provided with an air guiding mechanism, which is configured to connect or disconnect the first air duct from the air outlet.

[0013] In some embodiments, the air guide mechanism is disposed between the first air duct and the second air duct so that when the air purifier is in the secondary mode, the air guide mechanism directs the airflow from the first air duct into the second air duct.

[0014] In some embodiments, the air guiding mechanism includes: a base frame; a plurality of air guide vanes disposed circumferentially on the base frame; wherein the plurality of air guide vanes are rotatable around themselves to form a connecting port or a partition plate, the connecting port and the partition plate being used to connect and isolate the first air duct from the air outlet, respectively.

[0015] In some embodiments, the air guide mechanism further includes a drive assembly disposed on the base frame, the drive assembly being capable of driving all the air guide blades to rotate synchronously around itself.

[0016] In some embodiments, the drive assembly includes: a turntable; a plurality of transmission parts disposed circumferentially on the turntable and corresponding one-to-one with the plurality of guide vanes; wherein the turntable is capable of driving the transmission parts to rotate, thereby driving the guide vanes to rotate around itself.

[0017] In some embodiments, an air-guiding mechanism is further provided at the air outlet, the air-guiding mechanism being used to drive airflow from the air inlet to the air outlet.

[0018] In some embodiments, both the first filter element and the second filter element are configured as annular filter elements.

[0019] The air purifier according to this application has at least the following beneficial effects:

[0020] The air purifier of this application has a primary mode and a secondary mode. When the air purifier is in the primary mode, outside air enters the first air duct from the air inlet, is filtered and purified by the first filter element in the first air duct, and is then discharged from the air outlet, thus achieving single-stage air purification. When the air purifier is in the secondary mode, the first air duct is connected to the second air duct, and the first air duct is connected to the air outlet through the second air duct. Outside air enters the first air duct from the air inlet, is filtered and purified by the first filter element in the first air duct, enters the second air duct, is filtered and purified by the second filter element in the second air duct, and is finally discharged from the air outlet, thus achieving multi-stage air purification.

[0021] The air purifier of this application has a clever structure, providing two purification modes, namely the first-level mode and the second-level mode. The two purification modes achieve different levels of air purification, allowing users to switch between purification modes according to their actual needs and meet their usage requirements.

[0022] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0024] Figure 1 This is a schematic diagram of the structure of an air purifier according to an embodiment of this application;

[0025] Figure 2 This is a cross-sectional view of the air purifier in the first-level mode according to an embodiment of this application;

[0026] Figure 3 This is a cross-sectional view of the air purifier in secondary mode according to an embodiment of this application;

[0027] Figure 4 This is another structural cross-sectional view of the air purifier in the first-level mode according to an embodiment of this application;

[0028] Figure 5 This is a partial structural schematic diagram of the air guide mechanism according to an embodiment of this application;

[0029] Figure 6 This is a partial structural diagram of an air purifier in secondary mode according to an embodiment of this application;

[0030] Figure 7 This is a schematic diagram of the air guide mechanism of the air purifier in the secondary mode according to an embodiment of this application.

[0031] Figure 8 This is a partial structural diagram of an air purifier in its primary mode according to an embodiment of this application;

[0032] Figure 9 This is a schematic diagram of the air guide mechanism of the air purifier in the first-level mode according to an embodiment of this application.

[0033] Figure 10 for Figure 9 A magnified view of point A in the image;

[0034] Figure 11 for Figure 10 A magnified view of section B in the image;

[0035] Figure 12 This is a schematic diagram of the structure of the guide vane in an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: Air purifier 10; Housing 100; First air duct 110; Second air duct 120; Air inlet 130; Air outlet 140; Side air outlet 150; First filter element 200; Second filter element 300; Air guide mechanism 400; Base frame 410; First annular frame 411; Second annular frame 412; Air guide vane 420; Connecting port 430; Partition plate 440; Drive assembly 450; Turntable 451; Transmission part 452; Air extraction mechanism 500. Detailed Implementation

[0037] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0042] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0043] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] This application provides an air purifier 10, see [link]. Figure 1 , Figure 2 , Figure 3 and Figure 4 The air purifier 10 includes a housing 100, a first filter element 200 and a second filter element 300, and the air purifier 10 has a primary mode and a secondary mode.

[0046] The housing 100 has a first air duct 110 and a second air duct 120 inside. The housing 100 also has an air inlet 130 communicating with the first air duct 110 and an air outlet 140 communicating with the second air duct 120. The first filter element 200 is disposed in the first air duct 110 and the second filter element 300 is disposed in the second air duct 120.

[0047] Moreover, when the air purifier 10 is in the first-level mode, the first air duct 110 is connected to the air outlet 140, and the first air duct 110 is isolated from the second air duct 120.

[0048] When the air purifier 10 is in the secondary mode, the first air duct 110 is connected to the second air duct 120, and is connected to the air outlet 140 through the second air duct 120. That is, at this time, the first air duct 110 is connected to the air outlet 140 through the second air duct 120.

[0049] It should be noted that, Figure 2 and Figure 3 In the diagram, the dashed arrows within the casing 100 indicate the direction of airflow. "Connected" means that the two main components are in a conductive state, allowing airflow. "Blocked" means that the two main components are in a blocked state, preventing airflow.

[0050] The shape of the housing 100 can be, but is not limited to, a cuboid or a cylinder. The shapes of the first filter element 200, the second filter element 300, the first air duct 110, and the second air duct 120 can also be, but are not limited to, annular or cylindrical. The air inlet 130 is preferably an annular mesh formed on the outer wall of the housing 100 to increase the area for introducing external air and stabilize the airflow direction. The air outlet 140 is preferably located at the top of the housing 100, which also helps to stabilize the airflow direction.

[0051] The shape of the first filter element 200 is adapted to the shape of the first air duct 110 so that all air entering the first air duct 110 can be filtered and purified by the first filter element 200 to ensure purification quality. The shape of the two is preferably annular to obtain a sufficiently large purification area within a certain space.

[0052] Similarly, the shape of the second filter element 300 is adapted to the shape of the second air duct 120 so that all air entering the second air duct 120 can be filtered and purified by the second filter element 300 to ensure purification quality. The shape of the two is preferably annular to obtain a sufficiently large purification area within a certain space.

[0053] Understandably, see Figure 2 When the air purifier 10 is in the first-level mode, the first air duct 110 is separated from the second air duct 120. External air enters the first air duct 110 from the air inlet 130, is filtered and purified by the first filter element 200 in the first air duct 110, and is then discharged from the air outlet 140, thereby achieving single-level air purification.

[0054] See Figure 3 When the air purifier 10 is in the secondary mode, the first air duct 110 is connected to the second air duct 120, and the first air duct 110 is connected to the air outlet 140 through the second air duct 120. External air enters the first air duct 110 from the air inlet 130, is filtered and purified by the first filter element 200 in the first air duct 110, enters the second air duct 120, is filtered and purified by the second filter element 300 in the second air duct 120, and is finally discharged from the air outlet 140, thereby achieving multi-stage air purification.

[0055] In addition, it should be understood that the housing 100 of the air purifier 10 is equipped with corresponding primary mode on / off switches and secondary mode on / off switches, which facilitates the user to adjust and switch between the two modes.

[0056] It is easy to understand that the air purifier 10 of this application provides two purification modes, namely the first-level mode and the second-level mode. The second-level mode has a greater purification effect on the air than the first-level mode, so as to adapt to different air conditions and usage environments, and make it convenient for users to switch the purification mode according to their actual needs to meet their usage requirements.

[0057] In some embodiments of this application, the pore size of the first filter element 200 is larger than the pore size of the second filter element 300.

[0058] Specifically, both the first filter element 200 and the second filter element 300 are annular filter elements, and the mesh diameter of the first filter element 200 is larger than that of the second filter element 300, so that the first filter element 200 and the second filter element 300 can filter and purify pollutants of different diameters respectively.

[0059] The air purifier 10 of this application is designed with a corresponding two-stage mode, and in the two-stage mode, it is equipped with two first filter element 200 and second filter element 300 with different pore sizes. When the air purifier 10 purifies the air in the two-stage mode, the first filter element 200 and the second filter element 300 respectively select air pollutants of different diameters for interception. That is, the first filter element 200 with a larger pore size intercepts and filters pollutants with larger diameters in the air, and the second filter element 300 with a smaller pore size intercepts and filters pollutants with smaller diameters in the air, thereby achieving graded purification of the air. This not only improves the air purification efficiency, but also extends the service life of the corresponding filter elements.

[0060] Meanwhile, the air purifier 10 of this application, by configuring different numbers of filters with different pore sizes in the primary and secondary modes, allows users to selectively activate either the primary or secondary mode based on the actual air quality. For example, when the current air quality is severely polluted, heavily polluted, or moderately polluted, the user can choose to activate the secondary mode to achieve filtration improvement for that air quality; if the current air quality is lightly polluted, the user can choose to activate the primary mode to achieve filtration improvement for that air quality.

[0061] This allows the air purifier 10 to choose whether to use only the first filter 200 or both the first filter 200 and the second filter 300 to filter and purify air under different quality conditions. This enables the air purifier 10 to adapt to different air conditions or usage environments, extends the overall lifespan of the air purifier 10, reduces the replacement frequency of the first filter 200 or the second filter 300, saves costs, and further facilitates users to switch purification modes according to their actual needs to meet their usage requirements.

[0062] In some embodiments of this application, see Figure 4 The housing 100 is also provided with a side air vent 150 for connecting the first air duct 110 and the second air duct 120, and the side air vent 150 intersects with the first air duct 110.

[0063] Specifically, the first air duct 110 and the second air duct 120 are arranged vertically, and both are annular. A side air vent 150 is located between the first air duct 110 and the second air duct 120, intersecting the first air duct 110 at a 90° angle, and the diameter of the side air vent 150 is smaller than the diameter of the first air duct 110. The side air vent 150 can be configured as a valve that can be opened or closed (not shown in the figure). When the air purifier 10 is in the first-level mode, the side air vent 150 is closed; when the air purifier 10 is in the second-level mode, the side air vent 150 is open, thereby directly eliminating air duct interference between the first-level and second-level modes.

[0064] It should be noted that by setting the side air vent 150 to intersect with the first air duct 110, and making the diameter of the side air vent 150 smaller than the diameter of the first air duct 110, it is ensured that when the air purifier 10 is in the secondary mode, the first air duct 110 and the second air duct 120 are connected. This allows all the air filtered and purified by the first filter element 200 to be discharged to the air outlet 140 through the first air duct 110, eliminating the mutual interference between the primary mode and the secondary mode.

[0065] In some embodiments of this application, see Figure 2 and Figure 3 The housing 100 is provided with an air guiding mechanism 400, which is configured to connect or disconnect the first air duct 110 and the air outlet 140.

[0066] It is not difficult to understand, see Figure 2 When the air purifier 10 is in Level 1 mode, the air guide mechanism 400 connects the first air duct 110 with the air outlet 140, see [link / reference]. Figure 3When the first air duct 110 and the air outlet 140 are in the secondary mode, the air guiding mechanism 400 isolates the first air duct 110 and the air outlet 140, so that the first air duct 110 can only be connected to the air outlet 140 through the second air duct 120. In this way, after being filtered and purified by the first filter element 200, all the air enters the second air duct 120, and after being filtered and purified by the second filter element 300, it is discharged from the air outlet 140.

[0067] Clearly, the air guide mechanism 400 can effectively switch between the primary and secondary modes of the air purifier 10, allowing users to choose according to their actual needs.

[0068] In some embodiments of this application, see Figure 2 and Figure 3 The air guide mechanism 400 is located between the first air duct 110 and the second air duct 120 so that when the air purifier 10 is in the secondary mode, the air guide mechanism 400 guides the airflow of the first air duct 110 into the second air duct 120.

[0069] Understandably, since the air guide mechanism 400 is located between the first air duct 110 and the second air duct 120, and simultaneously between the first air duct 110 and the air outlet 140, when the air purifier 10 is in the secondary mode, the air guide mechanism 400 separates the first air duct 110 from the air outlet 140, and the side air vents 150 open, so that the first air duct 110 is connected to the second air duct 120 through the side air vents 150. At this time, when the airflow purified by the first filter element 200 in the first air duct 110 flows upward, it is directly blocked by the air guide mechanism 400, and then turns to the side air vents 150 on both sides to enter the second air duct 120, so as to be further filtered and purified by the second filter element 300 in the second air duct 120, thereby improving the purification quality of the air.

[0070] Clearly, the air guide mechanism 400 not only connects or isolates the first air duct 110 and the air outlet 140, but also quickly guides the airflow into the second air duct 120 when the air purifier 10 is in the secondary mode, thereby increasing the airflow rate and improving the air purification efficiency of the air purifier 10 in the secondary mode.

[0071] In some embodiments of this application, see Figure 4The air guiding mechanism 400 includes a base frame 410 and multiple air guide vanes 420. The multiple air guide vanes 420 are arranged circumferentially on the base frame 410, and the multiple air guide vanes 420 can rotate around themselves to form a connecting port 430 or a partition plate 440. The connecting port 430 and the partition plate 440 are used to connect and isolate the first air duct 110 and the air outlet 140, respectively. That is, when the multiple air guide vanes 420 form a connecting port 430, the first air duct 110 is connected to the air outlet 140 through the connecting port 430. When the multiple air guide vanes 420 form a partition plate 440, the partition plate 440 isolates the first air duct 110 from the air outlet 140.

[0072] For details, see Figure 5 The base frame 410 is annular and includes a first annular frame 411 and a second annular frame 412. Multiple guide vanes 420 are evenly arranged circumferentially between the first annular frame 411 and the second annular frame 412, and the two ends of each guide vane 420 are rotatably connected to the first annular frame 411 and the second annular frame 412 respectively. The first annular frame 411 and the second annular frame 412 are integral structures. Each guide vane 420 can be driven to rotate by an independent motor or driven to rotate synchronously by a separate drive mechanism, such as a gear and rack transmission mechanism.

[0073] See Figure 4 and Figure 5 When all the air guide vanes 420 are in the vertical position shown in the figure, all the air guide vanes 420 form a ring-shaped grid-like connecting port 430, that is, a single grid of connecting port 430 is formed between two adjacent air guide vanes 420. At this time, the first air duct 110 is connected to the air outlet 140 through the connecting port 430. The airflow that has been filtered and purified by the first filter element 200 in the first air duct 110 passes through the connecting port 430 and is discharged to the air outlet 140. This is the first-level mode of operation of the air purifier 10.

[0074] See Figure 6 and Figure 7 When all the air guide vanes 420 are in the horizontal position shown in the figure, all the air guide vanes 420 form a ring-shaped partition 440. At this time, the partition 440 separates the first air duct 110 from the air outlet 140, ensuring that the airflow filtered and purified by the first filter element 200 in the first air duct 110 is completely introduced into the second air duct 120 and further filtered and purified by the second filter element 300 in the second air duct 120 before flowing out to the air outlet 140. This is the second-level mode of operation of the air purifier 10.

[0075] It is easy to understand that by setting the air guide mechanism 400 in the above structure, the air purifier 10 can ensure that the introduced airflow is fully purified by the first filter element 200 and the second filter element 300 when the air purifier 10 is running in the secondary mode, thus ensuring air purification efficiency.

[0076] Moreover, when the air purifier 10 is running in Level 1 mode, the airflow that has been filtered and purified by the first filter element 200 in the first air duct 110 can be discharged to the air outlet 140 more evenly, thus improving the functionality of the air purifier 10.

[0077] Of course, see Figure 8 In other embodiments, all the guide vanes 420 can also be in an intermediate state between a horizontal state and a vertical state, that is, all the guide vanes 420 can rotate a certain angle relative to the horizontal state to an inclined state, the angle being greater than 0° and less than 90°, thereby adjusting the flow rate and direction of the airflow discharged from the first air duct 110 to the air outlet 140, so that the airflow flows more evenly to various positions in the environment, and can also achieve the effect of adjusting the corresponding airflow noise, further meeting the usage needs of different users.

[0078] In some embodiments of this application, see Figure 9 and Figure 10 The air guide mechanism 400 also includes a drive assembly 450 disposed on the base frame 410, which can drive all the air guide vanes 420 to rotate synchronously around itself.

[0079] Specifically, the drive assembly 450 includes a turntable 451 and multiple transmission parts 452, wherein the multiple transmission parts 452 are arranged circumferentially on the turntable 451, and each of the multiple transmission parts 452 corresponds to a multiple guide vanes 420. The turntable 451 can drive the transmission parts 452 to rotate, thereby driving the guide vanes 420 to rotate around itself.

[0080] It should be understood that, see Figure 9 The turntable 451 can be driven to rotate horizontally by a separate drive motor, or it can be driven to rotate horizontally by a combination of a drive motor and a gear transmission structure.

[0081] Preferred, see Figure 10 The inner wall of the turntable 451 is provided with an arc-shaped rack. The output end of the drive motor meshes with the arc-shaped rack through the transmission gear. The meshing accuracy between the arc-shaped rack and the transmission gear can be set such that when the arc-shaped rack is driven by the transmission gear to rotate clockwise by a certain angle, all the transmission parts 452 on the turntable 451 also rotate by a certain angle, thereby driving all the guide vanes 420 to rotate from the vertical state to the horizontal state in the vertical plane, thereby switching the connection state between the first air duct 110 and the air outlet 140 to the isolation state.

[0082] Similarly, when the arc rack is driven by the transmission gear to rotate counterclockwise by the same angle, all the transmission parts 452 on the turntable 451 also rotate by the same angle, thereby driving all the guide vanes 420 to rotate from the horizontal state to the vertical state in the vertical plane, thus switching the isolation state of the first air duct 110 and the air outlet 140 to the connected state.

[0083] The above settings can improve the rotation accuracy of the guide vane 420, so that the connection or disconnection between the first air duct 110 and the air outlet 140 can be accurately switched, further avoiding interference between the first-level mode and the second-level mode of the air purifier 10.

[0084] In one specific embodiment, see Figure 10 , Figure 11 and Figure 12 The transmission unit 452 includes two spaced-apart transmission columns. One end of the guide vane 420 passes through the first limiting groove on the first annular frame 411 and is movably mounted in the groove formed between the two transmission columns. The end of the guide vane 420 located in the groove is an L-shaped connecting rod, providing a structural basis for the guide vane 420 to rotate only in the vertical plane. The other end of the guide vane 420 is rotatably mounted in the second limiting groove on the second annular frame 412. Both the first and second limiting grooves limit the movement of the guide vane 420, preventing the guide vane 420 from deviating or misaligning, thus ensuring that the guide vane 420 rotates only in the vertical plane.

[0085] It should be understood that, in this embodiment, see Figure 11 When the turntable 451 drives the transmission columns to rotate clockwise along the horizontal plane, the two transmission columns press down on the end of the guide vane 420, driving the guide vane 420 to rotate relative to the first and second limiting grooves in the vertical plane around itself, preventing the guide vane 420 from rotating with the transmission columns. When the turntable 451 drives the transmission columns to rotate counterclockwise along the horizontal plane, the two transmission columns push upward on the end of the guide vane 420 due to friction, driving the guide vane 420 to rotate relative to the first and second limiting grooves in the vertical plane around itself, preventing the guide vane 420 from rotating with the transmission columns.

[0086] With this configuration, the rotation of the turntable 451 can drive all the guide vanes 420 to rotate around itself. Only one drive component is needed to drive the rotation of all the guide vanes 420, saving the installation space of the corresponding components and reducing the procurement cost of the corresponding components.

[0087] In some embodiments of this application, see Figure 1 , Figure 2 and Figure 3 It also includes an air-guiding mechanism 500 located at the air outlet 140, which is used to drive the airflow from the air inlet 130 to the air outlet 140.

[0088] Specifically, the air intake mechanism 500 can be a conventional axial flow fan. The air intake mechanism 500 can promote air flow and accelerate the air purification efficiency.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An air purifier, characterized in that, include: The shell has a first air duct and a second air duct inside, and each has an air inlet and an air outlet. The air inlet is connected to the first air duct, and the air outlet is connected to both the first air duct and the second air duct. The first air duct and the second air duct are arranged vertically and are both annular. The first filter element is located in the first air duct; The second filter element is disposed in the second air duct. Both the first filter element and the second filter element are configured as annular filter elements, and the shape of the first filter element is adapted to the shape of the first air duct, and the shape of the second filter element is adapted to the shape of the second air duct. The air purifier has a primary mode and a secondary mode. When the air purifier is in the primary mode, the first air duct is connected to the air outlet, and the first air duct is isolated from the second air duct. When the air purifier is in the secondary mode, the first air duct is connected to the second air duct, and the second air duct is connected to the air outlet. The housing also includes a side vent for connecting the first air duct and the second air duct. The side vent is located between the first air duct and the second air duct and intersects with the first air duct. The housing also includes an air guiding mechanism configured to connect or disconnect the first air duct from the air outlet. The air guiding mechanism is located between the first air duct and the second air duct, and also between the first air duct and the air outlet. When the air purifier is in Level 1 mode, the side vent is closed, and the air guiding mechanism connects the first air duct to the air outlet. When the air purifier is in Level 2 mode, the air guiding mechanism disconnects the first air duct from the air outlet, and the side vent is opened, allowing the first air duct to connect with the second air duct through the side vent. The air guiding mechanism then directs the airflow from the first air duct into the second air duct.

2. The air purifier according to claim 1, characterized in that, The pore size of the first filter element is larger than that of the second filter element.

3. The air purifier according to claim 1, characterized in that, The side air vent intersects the first air duct at a 90° angle.

4. The air purifier according to claim 1, characterized in that, The diameter of the side air vent is smaller than the diameter of the first air duct.

5. The air purifier according to claim 1, characterized in that, The housing is equipped with a primary mode on / off switch and a secondary mode on / off switch.

6. The air purifier according to claim 1, characterized in that, The air guiding mechanism includes: Base frame; Multiple air guide vanes are arranged circumferentially on the base frame; The multiple guide vanes are capable of rotating around themselves to form a connecting port or a partition, and the connecting port and the partition are used to connect and isolate the first air duct from the air outlet, respectively.

7. The air purifier according to claim 6, characterized in that, The base frame includes a first annular frame and a second annular frame, and a plurality of the guide vanes are evenly arranged circumferentially between the first annular frame and the second annular frame, and the two ends of each guide vane are respectively rotatably connected to the first annular frame and the second annular frame.

8. The air purifier according to claim 6, characterized in that, The air guide mechanism also includes a drive component disposed on the base frame, which can drive all the air guide blades to rotate synchronously around itself.

9. The air purifier according to claim 8, characterized in that, The driving component includes: Turntable; Multiple transmission units are arranged circumferentially on the turntable, each corresponding to one of the multiple guide vanes; The turntable can drive the transmission unit to rotate, thereby driving the guide vane to rotate around itself.

10. The air purifier according to claim 1 or 2, characterized in that, It also includes an air-guiding mechanism located at the air outlet, which drives the airflow from the air inlet to the air outlet.

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