Air purifying device

Abstract

The application discloses an air purification device, which comprises a shell, a sliding limiting assembly and a door body. The bottom of the side wall of the shell is provided with a plurality of air inlets. At least one of the air inlets is used to introduce outdoor air, and at least one of the air inlets is used to introduce indoor air. The sliding limiting assembly comprises an avoiding limiting track, which is arranged on the back side of the side wall and extends towards the top of the shell. The door body has a closed state in which the door body is movably arranged at the air inlet, and an open state in which the door body is loosened from the side wall of the air inlet and slidably arranged at the avoiding limiting track. The technical scheme of the application can introduce indoor air or outdoor air according to the needs of customers, thereby increasing the flexibility of air inlet of the air purification device.

Description

Technical Field

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

[0002] In recent years, with the growth of urban population and industrial development, as well as the increase in motor vehicles, air pollution has become increasingly serious. The increased concentration of particulate matter in the atmosphere (including coarse particulate matter PM10 and fine particulate matter PM2.5) has led to severe deterioration of air quality, with many cities experiencing severe smog. Smog poses a serious threat to people's health. People often stay indoors on smoggy days and, to prevent outdoor air pollution, often keep windows closed, which leads to insufficient oxygen indoors, also harming people's health. Consequently, many air purification devices have emerged on the market.

[0003] Currently, air purifiers on the market typically have two air inlets, with one inlet having an exhaust duct. The inlet without an exhaust duct draws in and purifies indoor air, while the other inlet draws in and purifies outdoor air through an exhaust duct. In the event of severe pollution, this type of air purifier will introduce a large amount of toxic and harmful substances, thus increasing the processing load on the air purifier. Furthermore, the air intake flexibility of this type of air purifier is poor. Summary of the Invention

[0004] The main objective of this invention is to provide an air purification device that addresses the issue of flexible air intake in air purification devices.

[0005] To achieve the above objectives, the air purification device proposed in this invention includes:

[0006] The housing has multiple air inlets at the bottom of its side wall, at least one of the air inlets being used to introduce outdoor air and at least one of the air inlets being used to introduce indoor air.

[0007] A sliding limiting assembly, the sliding limiting assembly including an avoidance limiting track disposed on the back side of the sidewall and extending toward the top of the housing; and

[0008] The door has a closed state that is movably disposed at the air inlet, and an open state in which the door is detached from the side wall of the air inlet and slidably disposed on the avoidance limit track.

[0009] Optionally, the avoidance limiting track includes an avoidance limiting rib, and the sliding limiting assembly further includes two lateral limiting ribs, the two lateral limiting ribs being respectively disposed on both sides of the air inlet in the horizontal direction and extending toward the top of the housing;

[0010] When the door is in the open state, the back of the door abuts against the avoidance limiting rib, the two sides of the door in the horizontal direction abut against the two lateral limiting ribs respectively, and slide towards the top of the shell.

[0011] Optionally, the sliding limiting assembly further includes a starting limiting rib, which is disposed on the bottom side of the air inlet and connects the bottom ends of the two lateral limiting ribs.

[0012] Optionally, the sliding limiting assembly further includes a stop limiting rib, which connects the top ends of the two lateral limiting ribs.

[0013] Optionally, the air purification device further includes a reset member disposed between the door and the avoidance limit track, the reset member being used to make the door tend to move toward the air inlet.

[0014] Optionally, the reset component is configured as a reset spring, and a rib is provided on the back of the door body corresponding to the avoidance limit track. One end of the reset spring is sleeved on the rib, and the other end abuts against the avoidance limit track.

[0015] Optionally, the bottom of the door is provided with a pull-out section for pulling the door downwards.

[0016] Optionally, the diameter of the multiple air inlets is the same.

[0017] Optionally, the housing is provided with an air inlet cavity, and the plurality of air inlets are all connected to the air inlet cavity. The air purification device further includes a filter assembly, which is located at the exhaust port of the air inlet cavity.

[0018] Optionally, the housing is further provided with an air outlet, which is located on the top surface of the housing and communicates with the air inlet. The air purification device also includes multiple annular air guide baffles, which are arranged in a ring-like pattern at intervals at the air outlet, and the height of the air guide baffles decreases sequentially from the inside to the outside.

[0019] Optionally, the air guide baffle is arc-shaped, and the air outlet side of the air guide baffle is flared.

[0020] Optionally, multiple air guide baffles are connected as a single unit by connecting ribs.

[0021] Optionally, the air guide baffle is detachably connected to the housing.

[0022] Optionally, the top surface of the housing is provided with a mounting ring, and the outer side of the outermost first air guide baffle abuts against the inner side of the mounting ring.

[0023] The aforementioned air purification device has at least the following beneficial effects:

[0024] This invention employs a sliding limiting component to position the door at the air inlet, controlling the opening and closing of the air intake. When the user wants to open the door, pressing it causes the door to retract and detach from the side wall of the air inlet. The back of the door then abuts against the limiting track and moves along it towards the top of the housing, gradually opening the air inlet and finally fixing itself at the top. When the user closes the door, pulling it downwards causes it to move downwards along the limiting track. When the door faces the air inlet, it moves towards the inlet, closing it. This door design helps prevent impurities from entering the air duct. Therefore, this invention not only prevents rodents, dust, and other debris from entering the air duct, ensuring its cleanliness, but also facilitates opening and closing the air inlet, avoiding the problem of the door being lost after disassembly. Furthermore, the casing is equipped with multiple air inlets, at least one for introducing outdoor air and at least one for introducing indoor air. This provides two air intake methods: outdoor and indoor. When the door of the indoor air inlet is open and the door of the outdoor air inlet is closed, the air purifier introduces indoor air; conversely, when the door of the indoor air inlet is closed and the door of the outdoor air inlet is open, the air purifier introduces outdoor air. Outdoor air intake reduces indoor air pollution levels while increasing oxygen levels and decreasing carbon dioxide levels, preventing bacterial growth and overcoming the shortcomings of current air purifiers that rely solely on indoor air intake, leading to insufficient oxygen supply. Indoor air intake reduces the processing load on the purification system during heavily polluted weather and extends the lifespan of the filter module. Therefore, this invention allows for the introduction of either indoor or outdoor air according to customer needs, increasing the flexibility of the air purifier's air intake. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the air purification device of the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the explosion structure of an air purification device;

[0028] Figure 3 for Figure 1 A cross-sectional view of an air purification device from one perspective;

[0029] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0030] Figure 5 for Figure 1 A cross-sectional view of an air purification device from another perspective.

[0031] Explanation of icon numbers:

[0032] 100 case 230 Stop limit rib 110 air inlet 300 Door 120 air intake chamber 400 Filtering components 130 air vent 410 Primary filter 140 Mounting ring 420 Medium efficiency filter 200 Sliding limit component 430 Activated carbon filter 210 Avoidance limit track 500 air deflector 220 Lateral limiting ribs

[0033] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0038] This invention proposes an air purification device.

[0039] Reference Figure 1 , Figure 3 and Figure 4 In one embodiment of the present invention, the air purification device includes a housing 100, a sliding limiting assembly 200, and a door 300. The bottom of the side wall of the housing 100 is provided with a plurality of air inlets 110, at least one air inlet 110 for introducing outdoor air and at least one air inlet 110 for introducing indoor air. The sliding limiting assembly 200 includes an avoidance limiting track 210, which is disposed on the back side of the side wall and extends toward the top of the housing 100. The door 300 has a closed state that is movably disposed at the air inlet 110, and an open state in which the door 300 is released from the side wall of the air inlet 110 and slidably disposed at the avoidance limiting track 210.

[0040] Currently, air purifiers on the market typically have a removable sealing door at the air inlet 110 when not in use to prevent foreign objects from entering the air duct of the air purifier. However, the installation and removal of this sealing door are cumbersome, and it is easily lost after removal. This technical solution addresses this by placing the door 300 at the air inlet 110 via a sliding limit assembly 200. This assembly controls the air intake of the air inlet 110. When the user wants to open the door 300, pressing it causes the door to retract and detach from the side wall of the air inlet 110. The back of the door then abuts against the avoidance limit track 210 and moves along the avoidance limit track 210 towards the top of the housing 100, gradually opening the air inlet 110, and finally fixing it to the upper end of the air inlet 110. When the user needs to close the door 300, they pull the door 300 downwards. The door 300 will move downwards along the avoidance limit track 210. When the door 300 moves to face the air inlet 110, it will move towards the air inlet 110 and close the air inlet 110. The design of the door 300 helps to prevent impurities from entering the air duct. It can be seen that the door 300 of this technical solution can not only prevent mice, dust and other debris from entering the air duct of the housing 100, thereby ensuring the cleanliness of the air duct, but also facilitate the opening and closing of the air inlet 110, avoiding the problem of the door 300 being lost after disassembly.

[0041] Furthermore, the housing 100 is provided with multiple air inlets 110, at least one air inlet 110 is used to introduce outdoor air, and at least one air inlet 110 is used to introduce indoor air. That is, it has two air intake methods: outdoor air intake and indoor air intake. When the door 300 of the air inlet 110 for introducing indoor air is open and the door 300 of the air inlet 110 for introducing outdoor air is closed, the air purifier introduces indoor air. When the door 300 of the air inlet 110 for introducing indoor air is closed and the door 300 of the air inlet 110 for introducing outdoor air is open, the air purifier introduces outdoor air. By using outdoor air intake, the indoor air pollution index can be reduced while increasing indoor oxygen content, reducing carbon dioxide content, and preventing bacterial growth. This overcomes the shortcomings of current air purification devices that all draw air from indoors, resulting in insufficient indoor oxygen supply. Indoor air intake can also reduce the processing load of the purification system during heavily polluted weather and extend the service life of the filter module. It is evident that the technical solution of this invention can introduce indoor or outdoor air according to customer needs, increasing the flexibility of air intake in the air purification device.

[0042] Furthermore, the outer side of the air inlet 110 is provided with a connector for connecting the air duct. When it is necessary to introduce outdoor air, the other end of the air duct extends to the outside.

[0043] Furthermore, the door 300 is fixed to its upper end by the damping between itself and the sliding limiting component 200. Of course, the present invention is not limited to this. In other embodiments, a fixing structure can also be provided at the upper end of the door 300 to fix the door 300 to its upper end. For example, an elastic limiting bead can be provided on the back side of the door 300, and a slot can be provided at the upper end of the avoidance limiting track 210. When the elastic limiting bead is placed in the slot, the door 300 is fixed to the upper end of the air inlet 110.

[0044] Furthermore, the avoidance limiting track 210 includes avoidance limiting ribs, and the sliding limiting assembly 200 also includes lateral limiting ribs 220. The lateral limiting ribs 220 are respectively disposed on both sides of the air inlet 110 in the horizontal direction and extend towards the top of the housing 100. When the door 300 is in the open state, the back of the door 300 abuts against the avoidance limiting ribs, and the two sides of the door 300 in the horizontal direction abut against the lateral limiting ribs 220 respectively, and slide towards the top of the housing 100. It can be understood that the setting of the avoidance limiting ribs can limit the distance of the door 300 backward and prevent the door 300 from loosening out of the sliding limiting assembly 200.

[0045] Furthermore, the lateral limiting rib 220 can restrict the lateral sliding position of the door 300, preventing the door 300 from tilting or laterally disengaging from the sliding limiting assembly 200. Of course, the invention is not limited to this. In other embodiments, the lateral limiting rib 220 may not be provided. Instead, a groove may be provided on the avoidance limiting track 210, and a sliding protrusion may be provided on the back of the door 300 corresponding to the groove. The sliding protrusion is slidably disposed within the groove and slides along the groove.

[0046] Furthermore, the sliding limiting assembly 200 also includes a starting limiting rib, which is located on the bottom side of the air inlet 110 and connects to the bottom ends of the two side limiting ribs 220. It can be understood that the starting limiting rib, located on the bottom side of the air inlet 110 and connected to the bottom ends of the two side limiting ribs 220, prevents the door 300 from moving downwards and disengaging from the bottom of the sliding limiting assembly 200 when the air inlet 110 is closed. Of course, the invention is not limited to this. In other embodiments, the starting limiting rib may be omitted, and the length of the bottom end of the side limiting ribs 220 may be increased to prevent the door 300 from disengaging from the bottom of the sliding limiting assembly 200.

[0047] Furthermore, the sliding limit assembly 200 also includes a stop limit rib 240, which connects to the top ends of the two side limit ribs 220. It can be understood that the stop limit rib 240 connecting to the top ends of the two side limit ribs 220 prevents the door 300 from detaching from the top of the sliding limit assembly 200 when the door body 300 moves upward and the air inlet 110 is opened. Of course, the invention is not limited to this. In other embodiments, the stop limit rib 240 may be omitted, and the length of the top ends of the side limit ribs 220 may be increased to prevent the door body 300 from detaching from the top of the sliding limit assembly 200.

[0048] Optionally, the air purification device also includes a reset member, which is located between the door 300 and the clearance limiting track 210. The reset member is used to make the door 300 tend to move towards the air inlet 110. It can be understood that when the user wants to open the door 300, he presses the door 300, the door 300 moves backward and releases from the side wall of the air inlet 110, the reset member is compressed by force, and then the back side of the door 300 abuts against the clearance limiting track 210, and the side edges of the opposite sides of the door 300 abut against the clearance limiting track 210. The lateral limiting rib 220 moves along the avoidance limiting track 210 towards the top of the housing 100, gradually opening the air inlet 110, and finally fixing itself to the upper end of the air inlet 110. Due to the compression of the reset component, it has a certain elastic restoring force. The reset component will always act on the door 300, causing the door 300 to always have a tendency to move towards the air inlet 110, that is, it always has a force to push against the side wall, thereby increasing the stability of the door 300 fixed to the upper end of the air inlet 110.

[0049] When the user closes the door 300, pulling it downwards causes it to move downwards along the obstacle avoidance track 210. When the door 300 reaches the air inlet 110, it moves towards the air inlet 110 under the action of the reset component, thus closing the air inlet 110. Therefore, the reset component increases the stability of the door 300 and facilitates closing the air inlet 110 by automatically moving it towards the air inlet 110 when it reaches the position directly opposite it, making closing the door easier. However, this invention is not limited to this. In other embodiments, the reset component may be omitted, and a handle may be provided on the front side of the door 300, using the handle to pull the door to close the air inlet 110.

[0050] Furthermore, the reset element is configured as a reset spring, and a raised rib is provided on the back of the door body 300 corresponding to the avoidance limit track 210. One end of the reset spring is sleeved on the raised rib, and the other end abuts against the avoidance limit track 210. This is because the reset spring has excellent elastic deformation and elastic recovery force, which is beneficial for driving the closed air inlet 110 of the door body 300. Of course, the present invention is not limited to this. In other embodiments, the reset element can also be configured as an elastic sheet, with one end of the elastic sheet connected to the back of the door body 300 and the other end abutting against the avoidance limit track 210.

[0051] Optionally, the bottom of the door 300 is provided with a pull-out part for pulling the door 300 downwards; it can be understood that the bottom edge of the air inlet 110 is provided with a relief groove corresponding to the pull-out part. The pull-out part is designed to provide a gripping position for the user when driving the door 300 to move, making it easier to push or pull the door 300 with less effort.

[0052] Furthermore, the pull-out part has a downward-extending T-shaped handle, which makes it easier for the user to hold. Of course, the invention is not limited to this. In other embodiments, the pull-out part may also be a downward-extending pull-out column.

[0053] Furthermore, the multiple air inlets 110 have the same diameter. It can be understood that setting multiple air inlets 110 to have the same diameter is to facilitate pipe connection.

[0054] Furthermore, the housing 100 includes a front housing, side housings, and a back housing, with multiple air inlets 110 respectively disposed on the side housings and the back housing. It can be understood that the air inlets 110 are not provided on the front housing in order to enhance the aesthetics of the air purification device. Of course, the present invention is not limited to this; in other embodiments, air inlets 110 may also be provided on the front housing.

[0055] Furthermore, there are five air inlets 110, with one air inlet 110 at the bottom of the back shell, and the side shells include a left side shell and a right side shell, with two air inlets 110 at the bottom of each of the left and right side shells. Of course, the present invention is not limited to this. In other embodiments, there may also be six air inlets 110, with two air inlets 110 each on the left side shell, the right side shell, and the back shell.

[0056] Furthermore, in this embodiment, the air inlet 110 at the bottom of the back shell is used to introduce outdoor air, while the other air inlets 110 are used to introduce indoor air. Of course, the present invention is not limited to this; in other embodiments, the air inlets 110 on the side shell can also introduce outdoor air.

[0057] Furthermore, multiple air inlets 110 are provided. Some air inlets 110 are equipped with sliding doors 300 via sliding limit components 200, and some air inlets 110 are equipped with blocking doors. Users can choose whether to enable the air inlet 110 with the blocking door according to their needs.

[0058] Reference Figure 5 Furthermore, the housing 100 is provided with an air inlet cavity 120, and multiple air inlets 110 are connected to the air inlet cavity 120. The air purification device also includes a filter assembly 400, which is located at the exhaust port of the air inlet cavity 120. It can be understood that the filter assembly 400 is beneficial for filtering impurities in the air.

[0059] Furthermore, the filter assembly 400 includes a coarse filter 410, which is designed to filter large impurities, such as, but not limited to, leaves, garbage bags, etc.

[0060] Furthermore, the filter assembly 400 also includes a medium-efficiency filter 420, which is used to filter dust particles larger than 1-5μm. It has the advantages of low resistance and large air volume, which helps to speed up the filtration process.

[0061] Furthermore, the filter assembly 400 also includes an activated carbon filter 430, which can adsorb residual chlorine that cannot be removed in the pre-filtration stage, as well as small molecule organic matter and other pollutants that leak from the pre-filtration stage. It also has the function of reducing COD, which helps to further enhance the cleanliness of air filtration.

[0062] Furthermore, in one embodiment, the coarse filter 410, the medium-efficiency filter 420, and the activated carbon filter 430 are arranged sequentially along the airflow direction.

[0063] Furthermore, a pre-filter box is installed inside the air inlet cavity 120. Each pre-filter box has a corresponding door for each air inlet 110, allowing users to choose whether to open the door and activate the pre-filter box as needed. Moreover, the pre-filter box is highly stable, lightweight, and inexpensive, which helps filter impurities in the air and reduces the cost of the air purification device.

[0064] Reference Figure 2 Optionally, the housing 100 also includes an air outlet 130, located on the top surface of the housing 100 and connected to the air inlet 110. The air purification device further includes multiple annular air guide baffles 500, which are arranged in a concentric ring at intervals at the air outlet 130. The height of the air guide baffles 500 decreases sequentially from the inside to the outside. The multiple air guide baffles 500 at different heights at the air outlet 130 allow the exhaust air to be directed to different heights. Furthermore, the concentric ring arrangement of the air guide baffles 500 at intervals at the air outlet 130 also enhances the aesthetics of the air guide baffles 500.

[0065] Furthermore, the air guide baffle 500 is arc-shaped, and the air outlet side of the air guide baffle 500 is flared; this helps to expand the air outlet angle and increase the air volume.

[0066] Furthermore, multiple air guide baffles 500 are connected as a single unit by connecting ribs; this facilitates the installation of the air guide baffles 500, requiring only one disassembly and installation, thus increasing the speed of installation and disassembly. Of course, the invention is not limited to this; in other embodiments, the multiple air guide baffles 500 can also be configured separately, and installed one air guide baffle 500 at a time during installation and disassembly.

[0067] Furthermore, the air guide baffle 500 is detachably connected to the housing 100; it is understood that the detachable nature facilitates more thorough inspection and cleaning, increasing the cleanliness of the cleaning process. Of course, the present invention is not limited to this; in other embodiments, the air guide baffle 500 may also be fixedly connected to the housing 100, for example, but not limited to, bonding and welding.

[0068] Furthermore, the top surface of the housing 100 is provided with a mounting ring 140, and the outer side of the outermost first air guide baffle abuts against the inner side of the mounting ring 140. Specifically, multiple air guide baffles 500 are connected as a single unit by connecting ribs, with the outer side of the outermost first air guide baffle abutting against the inner side of the mounting ring 140. This installation method is simple, requiring only a single push-in action to install multiple air guide baffles 500 onto the housing 100, increasing the efficiency of installation, disassembly, and cleaning of the air guide baffles 500. Of course, the present invention is not limited to this; in other embodiments, the air guide baffles 500 can also be snap-fitted to the housing 100.

[0069] Optionally, the outer side of the first air guide baffle is provided with an elastic pad, which abuts against the inner side of the mounting ring 140. This is because when the air guide baffle 500 is installed, the elastic pad will elastically avoid it, which facilitates the installation of the air guide baffle 500. Moreover, after the installation is completed, the elastic pad is squeezed, thus having an elastic restoring force, which abuts against the mounting ring 140, thereby increasing the stability of the installation.

[0070] Furthermore, the material of the elastic pad can be either foam or silicone; no specific material restrictions are placed on the elastic pad here.

[0071] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air purification device, characterized in that, include: The housing has multiple air inlets at the bottom of its side wall, at least one of the air inlets being used to introduce outdoor air and at least one of the air inlets being used to introduce indoor air. A sliding limiting assembly, the sliding limiting assembly including an avoidance limiting track, the avoidance limiting track being disposed on the back side of the sidewall and extending toward the top of the housing; as well as The door has a closed state that is movably disposed at the air inlet, and an open state in which the door is detached from the side wall of the air inlet and slidably disposed on the avoidance limit track. The air purification device also includes a reset member, which is disposed between the door and the avoidance limit track. The reset member is used to make the door tend to move toward the air inlet. The reset component is configured as a reset spring. A raised rib is provided on the back of the door body corresponding to the avoidance limit track. One end of the reset spring is sleeved on the raised rib, and the other end abuts against the avoidance limit track. The avoidance limit track includes an avoidance limit rib. The sliding limit assembly also includes two lateral limit ribs. The two lateral limit ribs are respectively located on both sides of the air inlet in the horizontal direction and extend towards the top of the housing. When the door is in the open state, the back of the door abuts against the avoidance limiting rib, the two sides of the door in the horizontal direction abut against the two lateral limiting ribs respectively, and slide towards the top of the shell.

2. The air purification device as described in claim 1, characterized in that, The sliding limiting assembly further includes a starting limiting rib, which is disposed on the bottom side of the air inlet and connects the bottom ends of the two lateral limiting ribs; and / or The sliding limiting assembly also includes a stop limiting rib, which connects the top ends of the two lateral limiting ribs.

3. The air purification device as described in claim 1, characterized in that, The bottom of the door is provided with a pull-out section for pulling the door downwards; and / or The diameter of all the aforementioned air inlets is the same.

4. The air purification device as described in claim 1, characterized in that, The housing has an air inlet chamber, and multiple air inlets are connected to the air inlet chamber. The air purification device also includes a filter assembly, which is located at the exhaust port of the air inlet chamber.

5. The air purification device according to any one of claims 1 to 4, characterized in that, The housing is also provided with an air outlet, which is located on the top surface of the housing and communicates with the air inlet. The air purification device also includes multiple annular air guide baffles, which are arranged in a ring-like pattern at intervals at the air outlet. The height of the air guide baffles decreases from the inside to the outside.

6. The air purification device as described in claim 5, characterized in that, The air guide baffle is arc-shaped, and the air outlet side of the air guide baffle is flared; and / or Multiple air guide baffles are connected as a single unit by connecting ribs; and / or The air guide baffle is detachably connected to the housing.

7. The air purification device as described in claim 6, characterized in that, The top surface of the housing is provided with a mounting ring, and the outer side of the first wind deflector located on the outermost side abuts against the inner side of the mounting ring.

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