Air treatment device

Abstract

The utility model discloses an air treatment device, and belongs to the technical field of air treatment. The air treatment device comprises a machine shell, an air inlet, an air outlet and an air outlet, wherein the machine shell is provided with an air opening and an air duct communicating with the air opening; the purification device is arranged at the air opening or in the air duct and is used for purifying air; the purification device comprises a frame, an air inlet and an air outlet, the multiple layers of filter screens are connected in the frame, meshes of every two adjacent layers of filter screens are staggered, purification agents are attached to the interiors of the meshes of the filter screens, the side length L of the meshes of the filter screens is smaller than or equal to 2 mm, and the thickness D of a single layer of filter screen is smaller than or equal to 15 mm. The air treatment device can improve the purification effect of the filter screen.

Description

Technical Field

[0001] This application relates to the technical field of air treatment, and particularly to an air treatment device. Background Art

[0002] Most air treatment devices, such as air conditioners, purifiers, fresh air fans, etc., use purification filters to purify air. Some filters are coated with purification agents, such as formaldehyde removal filters, which use the purification agents to adsorb formaldehyde to achieve the purpose of purifying air.

[0003] However, due to the small mesh holes of the filter and the relatively large thickness of the filter, it is difficult for the purification agent to uniformly penetrate into the mesh holes. Moreover, if the mesh holes are relatively large, although the penetration effect of the purification agent can be improved, the purification effect is not good. Utility Model Content

[0004] This application provides an air treatment device that can improve the purification effect of the filter.

[0005] On the one hand of this application, an air treatment device includes: a housing provided with an air outlet and an air duct communicating with the air outlet; and a purification device disposed at the air outlet or in the air duct for purifying air.

[0006] Wherein, the purification device includes: a frame; multiple layers of filters connected within the frame, the mesh holes of adjacent two layers of filters are misaligned, purification agents are attached in the mesh holes of the filters, the side length L of the mesh holes of the filters ≤ 2 mm, and the thickness D of a single layer of filter ≤ 15 mm.

[0007] In some embodiments, the adjacent two layers of filters are respectively the first layer of filter and the second layer of filter;

[0008] On the projection of the first layer of filter, any mesh hole in the middle of the first layer of filter intersects at least three mesh holes of the second layer of filter.

[0009] In some embodiments, the sides of the mesh holes of the first layer of filter are parallel to the sides of the mesh holes of the second layer of filter one by one, the sides of the mesh holes of the first layer of filter and the sides of the mesh holes of the second layer of filter have overlaps, and any mesh hole in the middle of the first layer of filter intersects three mesh holes of the second layer of filter.

[0010] In some embodiments, the sides of the mesh holes of the first layer of filter are parallel to the sides of the mesh holes of the second layer of filter one by one, the sides of the mesh holes of the first layer of filter and the sides of the mesh holes of the second layer of filter do not overlap, and any mesh hole in the middle of the first layer of filter intersects four mesh holes of the second layer of filter.

[0011] In some embodiments, the sides of the mesh holes of the first layer of filter are not parallel to the sides of the mesh holes of the second layer of filter.

[0012] In some embodiments, the filters are closely attached to each other.

[0013] In some embodiments, a flange frame is provided at the air outlet, and the purification device is inserted into the flange frame.

[0014] In some embodiments, there are multiple purification devices arranged side by side; two adjacent purification devices are connected by a Velcro fastener.

[0015] In some embodiments, the Velcro fastener includes a female fastener surface and a male fastener surface;

[0016] The opposite ends of the purification device are the first end and the second end respectively. The female fastener surface is connected to the first end, a part of the male fastener surface is connected to the second end, and the other part of the male fastener surface extends out of the second end for bonding with the female fastener surface of the adjacent purification device.

[0017] On the other hand of the present application, an air treatment device includes: a casing provided with an air outlet thereon and an air duct communicating with the air outlet; and a purification device disposed at the air outlet or in the air duct for purifying air;

[0018] Wherein, the purification device includes: a frame; multiple layers of filter meshes connected within the frame. The mesh holes of two adjacent layers of filter meshes are misaligned and have the same thickness. A purification agent is coated in the mesh holes of the filter meshes. The side length L of the mesh holes of the filter meshes ≤ 2 mm, and the thickness D of a single layer of filter mesh ≤ 15 mm. Description of the Drawings

[0019] Figure 1 Shows a schematic diagram of an air treatment device according to some embodiments;

[0020] Figure 2 Shows a cross-sectional view of an air treatment device according to some embodiments;

[0021] Figure 3 Shows a front view of the purification device of an air treatment device according to some embodiments;

[0022] Figure 4 Shows an exploded view of the filter mesh of an air treatment device according to some embodiments;

[0023] Figure 5 Shows a partial view of the filter mesh of an air treatment device according to some embodiments;

[0024] Figure 6 Shows a partial view of the filter mesh of an air treatment device according to some other embodiments;

[0025] Figure 7 Shows a partial view of the filter mesh of an air treatment device according to still some other embodiments;

[0026] Figure 8 Shows a front view of the purification device of an air treatment device according to some other embodiments.

[0027] In the above figures, 10 is the housing; 11 is the top plate; 12 is the bottom plate; 13 is the air inlet; 14 is the front side plate; 15 is the air outlet; 16 is the middle partition plate; 18 is the first chamber; 19 is the second chamber; 20 is the fan; 21 is the volute; 210 is the outlet; 22 is the fan; 30 is the heat exchanger; 31 is the water receiving tray; 40 is the purification device; 41 is the frame; 42 is the filter screen; 420 is the mesh hole; 421 is the first layer of filter screen; 422 is the second layer of filter screen; 423 is the reference mesh hole; 424 is the intersecting mesh hole; 50 is the flange frame; 60 is the nylon fastener; 61 is the female fastener surface; 62 is the male fastener surface. Detailed implementation mode

[0028] To make the purpose and implementation mode of this application clearer, the following will clearly and completely describe the exemplary implementation mode of this application in combination with the drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, rather than all the embodiments.

[0029] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0030] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The air treatment device of the present application is a device that appropriately controls air for use purposes, and is a device for regulating the temperature, humidity, or ventilation air flow of air. The air treatment device can be, for example, an air conditioner, a fresh air unit, a purifier, etc.

[0033] Due to people's high-quality demand for air, a purification device is usually provided in the air treatment device to purify the air. The present application mainly improves the structure of the purification device to enhance the purification effect.

[0034] The air treatment device of the present application will be introduced below by taking an air conditioner as an example:

[0035] In the present application, the air conditioner performs the refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes, involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

[0036] The compressor compresses the refrigerant gas in a low-temperature and low-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0037] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant for heat exchange with the material to be cooled. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0038] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger. The indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0039] The indoor heat exchanger and the outdoor heat exchanger are used as condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner serves as a heater in the heating mode. When the indoor heat exchanger is used as an evaporator, the air conditioner serves as a cooler in the cooling mode.

[0040] Refer to Figure 1 and Figure 2 , the air treatment device according to an embodiment of the present application includes a housing 10.

[0041] The housing 10 is generally in a cuboid shape, forming the appearance of the air treatment device. The housing 10 includes a top plate 11, a bottom plate 12, and side plates connected between the top plate 11 and the bottom plate 12. The top plate 11 forms the top structure of the air treatment device, and the bottom plate 12 is opposite to the top plate 11 up and down.

[0042] The rear end of the casing 10 is provided with an air inlet 13 for collecting indoor air into the casing 10. In other embodiments, the air inlet 13 can also be arranged at a rear position on the bottom plate 12.

[0043] An air outlet 15 is provided on the front side plate 14 of the casing 10 for sending the air in the casing 10 into the indoor space.

[0044] A middle partition plate 16 is arranged in the casing 10. The middle partition plate 16 is arranged vertically and divides the space in the casing 10 into a first chamber 18 and a second chamber 19. The first chamber 18 is located at the rear side and the second chamber 19 is located at the front side.

[0045] The air inlet 13 is located on the side of the first chamber 18 and communicates with the first chamber 18. The air outlet 15 is located on the side of the second chamber 19 and communicates with the second chamber 19.

[0046] A through opening 161 is provided on the middle partition plate 16, and the first chamber 18 and the second chamber 19 can be communicated through the opening 161.

[0047] The air treatment device includes a fan 20. The fan 20 is arranged in the first chamber 18 of the casing 10 and is used for forcing air flow so that the air flows from the air inlet 13 to the air outlet 15.

[0048] The fan 20 includes a volute 21 and a fan 22. The rotation of the fan 22 can be used as a power source for air flow, and the volute 21 covers the fan 22.

[0049] Suction openings are formed on the left and right side surfaces of the volute 21, an outlet 210 is formed at the front end of the volute 21, and the outlet end of the volute 21 is connected to the opening 161 of the middle partition plate 40.

[0050] The air treatment device includes a heat exchanger 30. The heat exchanger 30 is arranged in the casing 10 and is arranged on the air movement path from the outlet 210 of the fan 20 to the air outlet 15. The heat exchanger 30 is used for absorbing heat from the air introduced into the casing 10 or transferring heat to the air. A water receiving tray 31 is arranged below the heat exchanger 30 to collect the condensed water in the heat exchanger 30.

[0051] Specifically, the heat exchanger 30 is arranged in the second chamber 19 corresponding to the air outlet 15.

[0052] This structural form of air treatment device is mostly used in the scenario of ceiling installation. After the air treatment device is installed on the ceiling, the air inlet 13 and the air outlet 15 are respectively communicated with the indoor space.

[0053] Specific reference is made to Figure 2, in the figure, the arrow indicates the air flow direction. When the air treatment device operates, driven by the fan 22, indoor air enters the first chamber 18 of the housing 10 from the air inlet 13, then flows into the second chamber 19 through the air suction port and the outlet 210 of the volute 21 to exchange heat with the heat exchanger 30, and finally blows out from the air outlet 15.

[0054] The air inlet 13 and the air outlet 15 can be collectively referred to as air vents. The air flow path between the air inlet 13 and the air outlet 15 is called the air duct.

[0055] The air treatment device includes a purification device 40 for purifying air. The purification device 40 can be arranged at the air inlet 13 or the air outlet 15; the purification device 40 can also be arranged in the air duct.

[0056] Refer to Figure 3 and Figure 4 , the purification device 40 includes a frame 41. The frame 41 is in the shape of a cuboid frame, and the interior of the frame 41 is hollow to form a ventilation area.

[0057] The purification device 40 includes a filter screen 42. The filter screen 42 is connected inside the frame 41 corresponding to the ventilation area. The filter screen 42 has honeycomb-shaped mesh holes 420. Air flows through the mesh holes 420 of the filter screen 42.

[0058] The frame 41 or / and the filter screen 42 can be made of an aluminum-based material.

[0059] Purifying agents are attached inside the mesh holes 420 of the filter screen 42, such as agents for removing formaldehyde, so that the purification device 40 has the function of filtering formaldehyde in the air.

[0060] If the mesh holes 420 of the filter screen 42 are relatively large, more air will not come into contact with the filter screen when the air passes through the filter screen 42. That is to say, the larger the mesh holes 420 are, the worse the purification effect of the filter screen 42 is. Therefore, the mesh holes 420 of the filter screen 42 are usually set relatively small.

[0061] If the thickness of the filter screen 42 is relatively large, it is difficult for the purifying agent to completely penetrate into the mesh holes 420, which will reduce the formaldehyde removal effect of the filter screen 42.

[0062] If multiple purification devices are arranged on the air treatment device, the thickness of the filter screen of each purification device 40 can be set smaller. In this case, the purifying agents in the mesh holes 420 of the filter screen 42 can be made more uniform, but multiple connection structures need to be arranged on the device to meet the installation of multiple purification devices, which will make the structure of the device more complex and increase the cost.

[0063] In some embodiments of the present application, the purification device 40 has multiple layers of filter screens 42. The multiple layers of filter screens 42 are connected inside the same frame 41, and the mesh holes 420 of adjacent two layers of filter screens 42 are offset.

[0064] The mesh holes 420 are hexagonal. The side length L of the mesh holes 420 ≤ 2 mm, which can prevent the reduction of the purification effect caused by the larger mesh holes 420; the thickness D of the single-layer filter screen 42 ≤ 15 mm, which can avoid the problem that it is difficult for the purification agent to uniformly penetrate into the mesh holes 420 when the thickness of the filter screen 42 is relatively large.

[0065] Compared with the single-layer filter screen 42 in the prior art, in this application, multiple thinner filter screens 42 are stacked, and the overall thickness of the filter screen 42 is not reduced, ensuring the length of the purification path of the filter screen 42; at the same time, the thickness of each layer of the filter screen 42 in this application is thinner than that of the single-layer filter screen 42 in the prior art, which can ensure the uniform penetration of the purification agent into the mesh holes 420; in addition, the mesh holes 420 between the filter screens 42 in this application are arranged in a staggered manner, which can improve the density level of the mesh holes 420, increase the contact area between the air and the filter screen 42, and achieve the improvement of the purification efficiency.

[0066] The following takes the purification device 40 with two layers of filter screens 42 as an example for introduction:

[0067] In the prior art, the thickness of a single mesh of the purification device is 16 mm; in this application, the purification device uses two layers of filter screens 42, and the thickness of a single-layer filter screen 42 is 8 mm. A comparative experiment was conducted on the purification values of the purification device 40 in the prior art and this application, and the experimental data are shown in the following table:

[0068] Project 16mm single net 8mm + 8mm double net Lifting rate <![CDATA[Purification CADR value (m 3 / h)]]> 200 389 195％

[0069] It can be seen that by using the double-layer thin mesh stacking and staggering the mesh holes 420 of the double-layer filter screen 42 in this application, the purification efficiency is greatly improved.

[0070] Compared with the setting forms of multiple purification devices in the related art, the purification device 40 in this application can save about 26% of the material cost.

[0071] According to the embodiments of this application, referring to Figures 4 to 7 , the two layers of filter screens 42 are respectively the first-layer filter screen 421 and the second-layer filter screen 422. On the projection of the first-layer filter screen 421, any mesh hole 420 in the middle of the first-layer filter screen 421 intersects with at least three mesh holes 420 of the second-layer filter screen 422.

[0072] The more the number of intersections of the mesh holes in the two layers of filter screens, the larger the contact area between the air and the filter screen 42, and the higher the purification efficiency.

[0073] In some embodiments, referring to Figure 5 , in the first-layer filter screen 421, a set of opposite vertices of the mesh hole 420 are defined as being arranged vertically opposite. The mesh holes of the second-layer filter screen 422 are vertically and parallelly moved relative to the mesh holes of the first-layer filter screen 421 so that the mesh holes 420 of the two layers of filter screens 42 are staggered.

[0074] Taking any mesh hole 420 in the middle of the first - layer filter screen 421 as the reference mesh hole 423, this reference mesh hole 423 intersects with three mesh holes 420 of the second - layer filter screen 422. Assume these three mesh holes are the intersecting mesh holes 424. Since the dislocation of the two - layer mesh holes 420 is generated by the vertical translation of the mesh holes 420, the vertical side of the reference mesh hole 423 coincides with the vertical side of one of the intersecting mesh holes 424.

[0075] If the mesh holes 420 of the two - layer filter screens 42 are dislocated randomly during processing and production, it will lead to different dislocation states of the products. In this application, the vertical translation method is used to make the two - layer mesh holes 420 dislocate, which can improve the production efficiency, ensure the consistency of the dislocation state during processing, and thus ensure the consistency of the purification effect of the purification device 40.

[0076] In some embodiments, referring to Figure 6 , in the first - layer filter screen 421, a set of opposite vertices of the mesh hole 420 are defined as being vertically opposite. The mesh holes of the second - layer filter screen 422 are horizontally translated relative to the mesh holes of the first - layer filter screen 421 so that the mesh holes 420 of the two - layer filter screens 42 are dislocated.

[0077] Taking any mesh hole 420 in the middle of the first - layer filter screen 421 as the reference mesh hole 423, this reference mesh hole 423 intersects with four mesh holes 420 of the second - layer filter screen 422. Assume these four mesh holes are the intersecting mesh holes 424. The sides of the reference mesh hole 423 do not coincide with the sides of the intersecting mesh holes 424.

[0078] In this application, the horizontal translation method is used to make the two - layer mesh holes 420 dislocate, which can improve the production efficiency, ensure the consistency of the dislocation state during processing, and thus ensure the consistency of the purification effect of the purification device 40.

[0079] In some embodiments, referring to Figure 7 , the mesh holes 420 of the second - layer filter screen 422 are rotated by a certain angle relative to the mesh holes 420 of the first - layer filter screen 421 so that the mesh holes 420 of the two - layer filter screens 42 are dislocated.

[0080] In this embodiment, since the dislocation is generated by the rotation of the mesh holes 420, the sides of the mesh holes 420 of the first - layer filter screen 421 will not be parallel to the sides of the mesh holes 420 of the second - layer filter screen 422.

[0081] In this application, the method of relative rotation by a certain angle is used to make the two - layer mesh holes 420 dislocate, which can improve the production efficiency, ensure the consistency of the dislocation state during processing, and thus ensure the consistency of the purification effect of the purification device 40.

[0082] In some embodiments, the purification device 40 is installed at the air outlet of the air - handling device. Exemplarily, referring toFigure 1 The purification device 40 is installed at the air inlet 13 of the air handling device.

[0083] A flange frame 50 is connected to the air inlet 13. The purification device 40 is inserted into the flange frame 50. When the filter screen 42 needs to be cleaned, the purification device 40 can be pulled out from the flange frame 50; after the cleaning is completed, the purification device 40 is reinstalled into the flange frame 50.

[0084] Specifically, the flange frame 50 is provided with a guide rail groove extending in the left-right direction, and an installation opening is provided at the end of the guide rail groove; the purification device 40 is inserted into the guide rail groove from the installation opening.

[0085] In some embodiments, there are multiple purification devices 40 arranged along the extending direction of the guide rail groove.

[0086] When the air inlet is large, if a large purification device 40 is used, since the filter screen 42 is relatively thin, it is easy to deform; or, it is also inconvenient to clean the entire large filter screen. Therefore, in the embodiments of the present application, multiple small purification devices 40 are used instead of the entire large purification device.

[0087] Combined with Figure 8 , adjacent two purification devices 40 can be connected by a nylon fastener 60. Connecting the purification devices 40 together facilitates the removal of the purification device 40.

[0088] The form of connection by the nylon fastener 60 has a relatively low cost and a relatively simple structure. There is no need to set a complex connection structure on the frame 41, and the adhesive force of the nylon fastener 60 is relatively large, which can meet the connection requirements between the purification devices 40.

[0089] The nylon fastener 60 includes a female fastener surface 61 and a male fastener surface 62. The female fastener surface 61 and the male fastener surface 62 can be bonded together.

[0090] The opposite ends of the purification device 40 are the first end and the second end respectively. The female fastener surface 61 can be connected to the first end of the top surface of the purification device 40 by screws or bonding; a part of the male fastener surface 62 can be connected to the second end of the top surface of the purification device 40 by screws or bonding, and the other part of the male fastener surface 62 extends out of the second end of the purification device 40.

[0091] The bonding surface of the female fastener surface 61 faces upward, and the bonding surface of the male fastener surface 62 faces downward. The part of the male fastener surface 62 located outside the purification device 40 can be bonded to the female fastener surface 61 of the adjacent purification device 40, thereby realizing the connection of the two purification devices 40.

[0092] Exemplarily, multiple purification devices 40 are arranged in the left-right direction, and the purification device 40 is inserted into the flange frame 50 from the left end.

[0093] The first end of the purification device 40 is the right end, and the second end of the purification device 40 is the left end. The part extending from the male buckle surface 62 at the left end of the purification device 40, which is the leftmost one, can be used as a pull strap. By pulling the pull strap, the purification device 40 can be pulled out.

[0094] In other embodiments, the Velcro 60 can also be provided on the bottom surface of the purification device 40.

[0095] As described above, in the air treatment device according to the present application, multiple relatively thin filter meshes 42 are stacked. On the basis of ensuring that the overall thickness of the filter mesh 42 is not reduced, it can ensure the uniform infiltration of the purification agent into the mesh holes 420, thereby improving the purification efficiency.

[0096] In addition, in the present application, the mesh holes 420 between the filter meshes 42 are arranged in a staggered manner, which can improve the density level of the mesh holes, increase the contact area between the air and the filter mesh 42, and further improve the purification efficiency.

[0097] In addition, in the present application, multiple filter meshes 42 are stacked into a purification device 40. Compared with the setting of multiple purification devices 40 in the related art, it can save material costs.

[0098] In addition, in the present application, the two-layer mesh holes 420 are misaligned by means of horizontal translation, vertical translation or rotation by a fixed angle of the mesh holes, which can improve the production efficiency and ensure the consistency of the misaligned state during processing, thereby ensuring that the purification effects of the purification devices 40 are all the same.

[0099] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0100] For the sake of convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussions are not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. An air treatment device, characterized in that, Comprising: A casing, on which there are air inlets, and an air duct communicating with the air inlets; And A purification device, arranged at the air inlet or in the air duct, for purifying air; Wherein, the purification device comprises: A frame; Multiple layers of filter meshes, connected within the frame, the mesh holes of adjacent two layers of the filter meshes being misaligned, purification agents being attached in the mesh holes of the filter meshes, the side length L of the mesh holes of the filter meshes ≤ 2 mm, and the thickness D of a single layer of the filter meshes ≤ 15 mm.

2. The air treatment device according to claim 1, characterized in that, Adjacent two layers of the filter meshes are respectively a first-layer filter mesh and a second-layer filter mesh; On the projection of the first-layer filter mesh, any mesh hole in the middle of the first-layer filter mesh intersects at least three mesh holes of the second-layer filter mesh.

3. The air treatment device according to claim 2, wherein The sides of the mesh holes of the first-layer filter mesh are in one-to-one correspondence and parallel with the sides of the mesh holes of the second-layer filter mesh, there is an overlap between the sides of the mesh holes of the first-layer filter mesh and the sides of the mesh holes of the second-layer filter mesh, and any mesh hole in the middle of the first-layer filter mesh intersects three mesh holes of the second-layer filter mesh.

4. The air treatment device according to claim 2, wherein The sides of the mesh holes of the first-layer filter mesh are in one-to-one correspondence and parallel with the sides of the mesh holes of the second-layer filter mesh, there is no overlap between the sides of the mesh holes of the first-layer filter mesh and the sides of the mesh holes of the second-layer filter mesh, and any mesh hole in the middle of the first-layer filter mesh intersects four mesh holes of the second-layer filter mesh.

5. The air treatment device according to claim 2, characterized in that, The sides of the mesh holes of the first-layer filter mesh are not parallel to the sides of the mesh holes of the second-layer filter mesh.

6. The air treatment device according to claim 1, characterized in that, The filter meshes are closely attached to each other.

7. The air treatment device according to any one of claims 1-6, characterized in that, A flange frame is arranged at the air inlet, and the purification device is inserted into the flange frame.

8. The air treatment device according to claim 7, wherein There are multiple purification devices arranged side by side; adjacent two purification devices are connected by a nylon fastener.

9. The air treatment device according to claim 8, wherein, The nylon fastener comprises a female fastener surface and a male fastener surface; The opposite two ends of the purification device are respectively a first end and a second end, the female fastener surface is connected to the first end, a part of the male fastener surface is connected to the second end, and the other part of the male fastener surface extends out of the second end for bonding with the female fastener surface of the adjacent purification device.

10. An air treatment device, characterized in that, Comprising: A casing, on which there are air inlets, and an air duct communicating with the air inlets; And A purification device, arranged at the air inlet or in the air duct, for purifying air; Wherein, the purification device comprises: A frame; At least two layers of filter meshes, connected within the frame, the mesh holes of adjacent two layers of the filter meshes being misaligned and having the same thickness, purification agents being covered in the mesh holes of the filter meshes, the side length L of the mesh holes of the filter meshes ≤ 2 mm, and the thickness D of a single layer of the filter meshes ≤ 15 mm.

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