Filter

Abstract

The utility model discloses a filter, which relates to the field of air purification and is used for solving the problem of higher bypass air leakage rate of the existing filter. The filter includes a filter unit. The filtering unit comprises a filtering frame, a filtering piece, a positioning piece and a limiting piece. The filter frame comprises a side frame and a bottom frame. The side frame is located on one side of the bottom frame and arranged around the periphery of the bottom frame by a circle. Ventilation holes are formed in the bottom frame. The filtering piece is arranged on the side, close to the side frame, of the bottom frame, located in the side frame and covers the ventilation hole. The positioning piece is located on the side, away from the bottom frame, of the filtering piece, surrounds the periphery of the filtering piece by one circle and abuts against the filtering piece. The limiting piece is connected with the side frame, located on the side, away from the filtering piece, of the positioning piece and abuts against the positioning piece. The filter is used for filtering air.

Description

Technical Field

[0001] The utility model relates to the field of air purification, in particular to a filter. Background Art

[0002] A filter can filter impurities in the air to achieve air purification. Among them, the filter generally includes a filter screen. When the impurities in the air pass through the filter screen, they will be blocked by the filter screen, thereby achieving air filtration.

[0003] In the related art, the filter further includes an outer frame, and a slideway is arranged on the outer frame. The filter screen is slidably connected to the slideway to realize the installation of the filter screen.

[0004] However, when the filter is installed using the slideway, there will be a large gap between the filter and the slideway, resulting in a high bypass air leakage rate of the filter. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a filter for solving the problem of high bypass air leakage rate of the existing filter.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] The embodiment of the present application provides a filter, which includes a filtering unit. The filtering unit includes a filtering frame, a filtering element, a positioning element, and a limiting element. The filtering frame includes side frames and a bottom frame. The side frames are located on one side of the bottom frame and are arranged around the perimeter of the bottom frame. The bottom frame is provided with ventilation holes. The filtering element is arranged on the side of the bottom frame close to the side frames, inside the side frames, and covers the ventilation holes. The positioning element is located on the side of the filtering element away from the bottom frame, arranged around the perimeter of the filtering element, and abuts against the filtering element. The limiting element is connected to the side frames, located on the side of the positioning element away from the filtering element, and abuts against the positioning element.

[0008] For the filter provided by the embodiment of the present application, the polluted air enters through the ventilation holes, and the polluted air is filtered by the filtering element. The positioning element abuts against the filtering element, and the positioning element is pressed and tightened by the limiting element, so that the positioning element can press the filtering element against the bottom frame. By pressing, the bypass air leakage rate of the filtering unit is greatly reduced, and good sealing performance is achieved.

[0009] In some embodiments, the filtering element includes a filter element and a frame. The frame is located on the peripheral side of the filter element and is arranged around the periphery of the filter element. The filter element is installed on the frame. Among them, a recessed portion is formed on the side of the frame close to the positioning element, and the recessed portion is annular. The positioning element is located in the recessed portion.

[0010] In some embodiments, the number of the limiting elements is multiple, and the multiple limiting elements are arranged at intervals along the circumferential direction of the positioning element and are arranged around the positioning element for one week.

[0011] In some embodiments, the limiting member includes a first limiting member and a second limiting member. The first limiting member is detachably connected to the side frame. The second limiting member is connected to the first limiting member and abuts against the positioning member.

[0012] In some embodiments, the first limiting member is provided with a mounting hole. The second limiting member is inserted into the mounting hole and is threadedly connected to the first limiting member.

[0013] In some embodiments, a mounting portion is formed on the inner side of the side frame. The mounting portion is located on the side of the positioning member away from the filter element. A limiting groove is formed on the side of the mounting portion close to the filter element. A part of the first limiting member is located in the limiting groove.

[0014] In some embodiments, the filter further includes a sealing member. The sealing member is annular. The sealing member is disposed between the filter element and the bottom frame, is disposed on the bottom frame, and is respectively attached to the periphery of the bottom frame and the filter element.

[0015] In some embodiments, the frame is made of a paper material.

[0016] In some embodiments, the number of filter units is multiple. The multiple filter units are arranged in multiple rows along a first direction, and multiple filter units are distributed along a second direction in each row. Among them, two adjacent filter units are detachably connected, and the first direction and the second direction are perpendicular.

[0017] In some embodiments, connection holes are formed on the side frame. The filter further includes a plurality of fasteners. The fasteners are inserted into the connection holes of two adjacent side frames, and the two adjacent side frames are connected to each other through the fasteners. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 One of the structural schematic diagrams of a filter provided by an embodiment of the present application;

[0020] Figure 2 Two of the structural schematic diagrams of a filter provided by an embodiment of the present application;

[0021] Figure 3 Three of the structural schematic diagrams of a filter provided by an embodiment of the present application;

[0022] Figure 4 Four of the structural schematic diagrams of a filter provided by an embodiment of the present application;

[0023] Figure 5 One of the structural schematic diagrams of a filter box provided by an embodiment of the present application;

[0024] Figure 6 One of the structural schematic diagrams of a filter unit provided by an embodiment of the present application;

[0025] Figure 7 The second structural schematic diagram of a filter unit provided by an embodiment of the present application;

[0026] Figure 8 One of the partial cross-sectional views of a filter unit provided by an embodiment of the present application;

[0027] Figure 9 The third structural schematic diagram of a filter unit provided by an embodiment of the present application;

[0028] Figure 10 The partial structural schematic diagram of a filter unit provided by an embodiment of the present application;

[0029] Figure 11 The cross-sectional view of a filter unit provided by an embodiment of the present application;

[0030] Figure 12 The fourth structural schematic diagram of a filter unit provided by an embodiment of the present application;

[0031] Figure 13 The second partial cross-sectional view of a filter unit provided by an embodiment of the present application;

[0032] Figure 14 The structural schematic diagram of a limiting member provided by an embodiment of the present application;

[0033] Figure 15 The second structural schematic diagram of a filter box provided by an embodiment of the present application;

[0034] Figure 16 The third partial cross-sectional view of a filter unit provided by an embodiment of the present application;

[0035] Figure 17 The partial structural schematic diagram of a filter provided by an embodiment of the present application;

[0036] Figure 18 The fourth partial cross-sectional view of a filter unit provided by an embodiment of the present application.

[0037] Reference numerals:

[0038] 1000 - Filter;

[0039] 100 - Filter unit;

[0040] 1 - Filter frame; 11 - Side frame; 111 - Connection hole; 112 - Installation part; 113 - Positioning part; 1121 - Limit groove; 12 - Bottom frame; 121 - Ventilation hole;

[0041] 2 - Fastener;

[0042] 3 - Filter element; 31 - Frame; 311 - Concave part; 32 - Filter element;

[0043] 4 - Positioning piece;

[0044] 5 - Limiting piece; 51 - First limiting piece; 511 - Installation hole; 52 - Second limiting piece; 521 - Foot pad; 6 - Sealing piece. Detailed implementation mode

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is the orientation or relative positional relationship based on the orientation shown in the accompanying drawings, and is only for the convenience of describing the present invention 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 the present invention. Without special instructions, in the case of meeting the relative positional relationship shown in the accompanying drawings, the above-described orientation description can be flexibly set during the actual application process.

[0047] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating 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 the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0048] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "communication" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.

[0049] In the embodiments of the present utility model, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, article or device comprising such element.

[0050] In the embodiments of the present utility model, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present utility model should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0051] With the improvement of people's living standards, people's requirements for the quality of life have gradually increased, and they have also paid more and more attention to the comfort of the indoor environment. Among them, air-conditioning equipment, air purifiers and other air-conditioning devices can all play a certain role in adjusting the indoor environment.

[0052] In order to achieve air purification, air-conditioning devices generally include filters. The filter can filter impurities in the air to achieve air purification. Among them, the filter generally includes a filter mesh, and impurities in the air will be blocked by the filter mesh when passing through the filter mesh, thereby achieving air filtration.

[0053] The industry refers to the proportion of unfiltered air leaking around the filter or through its structure rather than the filter mesh itself as the bypass leakage rate. The bypass leakage rate directly affects the actual filtration efficiency of the filter.

[0054] In the related art, the filter further includes an outer frame, and a slideway is provided on the outer frame. The filter screen is slidably connected to the slideway to achieve the installation of the filter screen. However, when installing in the above-mentioned manner, since this method only relies on the gravity of the filter itself and does not involve clamping or flange connection. At the same time, due to its structural characteristics, it is also difficult to use a gasket or sealant on the sliding surface to ensure close contact. Therefore, there will be a large gap between the slideway and the filter screen, resulting in a high bypass air leakage rate of the filter, and air is likely to directly pass through the gap, affecting the air filtration effect.

[0055] To solve the above problems, an embodiment of the present application provides a filter, as Figure 1 shown, Figure 1 is a schematic structural diagram of a filter 1000 provided by an embodiment of the present application. The filter 1000 includes a filtering unit 100.

[0056] In some embodiments, the filter 1000 includes a plurality of filtering units 100. The structures of the plurality of filtering units are the same as each other. And the plurality of filtering units 100 can be arranged in different ways to form the filter 1000. Exemplarily, as Figure 1 shown, the filtering units 100 are arranged in multiple rows along the first direction X, and a plurality of filtering units 100 are distributed in each row along the second direction Y. Among them, two adjacent filtering units 100 are detachably connected. The first direction X and the second direction Y are perpendicular.

[0057] Continuing to refer to Figure 1 , the projection of the filtering unit 100 in the plane formed by the first direction X and the second direction Y is a rectangle. The entire filter 1000 is formed by arranging the filtering units 100 in sequence along the first direction X and the second direction Y and detachably connecting two adjacent filtering units 100. In this way, the filter 1000 can have a larger filtering area and is suitable for the filtering requirements of larger scenarios.

[0058] Furthermore, since the filtering unit 100 is separately processed and manufactured, compared with manufacturing a single large-sized filter 1000, the cost of manufacturing a plurality of filter units 100 that can be connected to each other is lower.

[0059] In some embodiments, the filter 1000 includes one filtering unit 100. In this way, the filter 1000 can be suitable for the filtering requirements of some special narrow scenarios.

[0060] In some embodiments, as Figure 2 shown, Figure 2 is a schematic structural diagram of a filter 1000 provided by an embodiment of the present application. The shape of the filter 1000 can be adjusted by changing the number of filtering units 100 in the first direction X and the second direction Y. In this way, it can adapt to the shapes of different installation positions.

[0061] In some embodiments, the shape of the filter 1000 can be adjusted by changing the shape of the filtering unit 100. Exemplarily, as Figure 3 shown, Figure 3 FIG. is a schematic structural diagram of a filter 1000 provided by an embodiment of the present application. The filtering unit 100 can be projected as a regular hexagon in a plane formed by a first direction X and a second direction Y. Adjacent two filtering units 100 are detachably connected to form a honeycomb-like structure. In this way, the shape of the filter 1000 can adapt to the installation position with a honeycomb shape.

[0062] Among them, in order to achieve the detachable connection between adjacent two filtering units 100, the connection between the filtering units 100 includes various forms.

[0063] In some embodiments, as Figure 4 shown, Figure 4 FIG. is a schematic structural diagram of a filter 1000 provided by an embodiment of the present application. The filtering unit 100 includes a filtering frame 1 and a fastener 2. Among them, the filtering frame 1 includes a side frame 11, and a connection hole 111 is opened on the side frame 11. The fastener 2 passes through the connection holes 111 of the side frames 11 of adjacent two filtering units 100, and the adjacent two side frames 11 are connected to each other through the fastener 2. Among them, the fastener 2 and the connection hole 111 opened on the side frame 11 can be a threaded connection or a snap connection.

[0064] In this way, as Figure 4 shown, by passing the fastener 2 through the connection hole 111 of the side frame 11, the relative positions of adjacent two filtering units 100 can be fixed. In this way, the connection between multiple groups of adjacent filtering units 100 forms an integral filter 1000. In addition, the filter 1000 can be disassembled into several filtering units 100 by disassembling the fastener 2.

[0065] In some embodiments, the fastener 2 can also be in other forms. Exemplarily, the fastener 2 is an integral installation frame, and the fastener 2 is provided with grooves according to the arrangement of the filtering units 100, so that the side frames 11 of multiple filtering units 100 can be inserted into the grooves provided by the fastener 2 to form the entire filter 1000.

[0066] At the same time, in order to better ensure the sealing performance of the connection part between the filtering units 100. Exemplarily, the outer surface where the side frames 11 are connected is kept flat. When connected through the fastener 2, there is no gap that can allow air to flow through at the connection position between the filtering units 100.

[0067] In addition, the connection between the filtering units 100 can also adopt a fixed connection method. For example, in welding or machining, the side frames 11 between the filtering units 100 are directly manufactured into an integral structure form. As long as through this connection method, the sealing performance of the connection part of the side frames 11 between the filtering units 100 can be ensured.

[0068] In some embodiments, as Figure 5 shown, Figure 5 FIG. is a schematic structural diagram of a filtering frame 1 provided by an embodiment of the present application. The filtering frame 1 of the filtering unit 100 ( Figure 1 ) further includes a bottom frame 12. The side frame 11 is located on one side of the bottom frame 12 and is arranged around the periphery of the bottom frame 12. The bottom frame 12 is provided with ventilation holes 121. Since the size of the ventilation holes 121 provided in the bottom frame 12 is smaller than the size of the filtering frame 1. In this way, the bottom frame 12 can play a limiting role on other components installed in the filtering frame 1 whose size is larger than the size of the ventilation holes 121.

[0069] As Figure 6 shown, Figure 6 FIG. is a schematic structural diagram of a filtering unit 100 provided by an embodiment of the present application. The filtering unit 100 further includes a filtering member 3. The filtering member 3 is arranged on the side of the bottom frame 12 close to the side frame 11, inside the side frame 11, and covers the ventilation holes 121.

[0070] The filtering member 3 has the function of filtering air. The filtering member 3 covering the ventilation holes 121 enables the polluted air to flow through the filtering member 3 to the other end after passing through the ventilation holes 121, and the filtering member 3 intercepts the pollutants during this process. Thus, the effect of purifying the air is achieved.

[0071] Exemplarily, the filtering member 3 is made of chemical fiber. By forming a structure of multiple layers of fibers with complex channels, the pollutants in the air will be captured when passing through these channels, thus achieving the effect of purifying the air.

[0072] In some embodiments, as Figure 4 shown, in order to better arrange the filtering member 3 inside the side frame 11, the side frame 11 further includes a plurality of positioning parts 113. The plurality of positioning parts 113 are arranged around the periphery of the filtering member 3, and the plurality of positioning parts 113 are abutted against the side edges of the filtering member 3. So that the filtering member 3 is stably arranged inside the side frame 11 and plays a guiding role in the installation of the filtering member 3.

[0073] As Figure 7 shown, Figure 7The figure is a schematic structural diagram of a filtering unit 100 provided by an embodiment of the present application. The filtering unit 100 further includes a positioning member 4 and a limiting member 5. The positioning member 4 is located on the side of the filtering member 3 away from the bottom frame 12, and the positioning member 4 is arranged around the periphery of the filtering member 3. The limiting member 5 is located on the side of the positioning member 4 away from the filtering member 3. Among them, the positioning member 4 is annular. In this way, the filtered air can pass through the positioning member 4.

[0074] Among them, as Figure 8 shown, Figure 8 The figure is a partial cross-sectional view of a filtering unit 100 provided by an embodiment of the present application. The positioning member 4 abuts against the filtering member 3. The limiting member 5 is connected to the side frame 11 and abuts against the positioning member 4. One side of the filtering member 3 abuts against the bottom frame 12, and the other side abuts against the positioning member 4.

[0075] Based on this, the limiting member 5 abuts against the positioning member 4 on the side away from the bottom frame 12. By applying pressure to the positioning member 4 through the limiting member 5, the positioning member 4 is tightly pressed on the filtering member 3. At the same time, through the transmission of force, the filtering member 3 is tightly pressed on the bottom frame 12. In addition, since the limiting member 5 is connected to the side frame 11, the limiting member 5 will not shift due to the reaction force. Through this pressing method, the bypass air leakage rate of the filtering unit 100 ( Figure 7 ) is greatly reduced, and good sealing performance is achieved.

[0076] It is easy to understand that the connection between the limiting member 5 and the side frame 11 can be a fixed connection or a detachable connection, and its connection method can limit the displacement of the limiting member 5 in the direction away from the positioning member 4.

[0077] Among them, the number of the limiting members 5 can be multiple. As Figure 9 shown, Figure 9 The figure is a schematic structural diagram of a filtering unit 100 provided by an embodiment of the present application. Multiple limiting members 5 are arranged around the periphery of the filtering member 3. In this way, the positioning member 4 can be subjected to circumferentially arranged pressure perpendicular to the plane where the X direction and the Y direction are located, and the positioning member 4 will not tilt during the pressure application process. At the same time, since the positioning member 4 disperses the pressure of the abutting position brought by the limiting member 5, the force that the limiting member 5 can apply to the positioning member 4 will also be greater.

[0078] In some embodiments, the limiting member 5 can also be a single component, which is connected to the side frame 11 and applies pressure to the positioning member 4.

[0079] Exemplarily, the positioning member 4 can be an aluminum sheet metal. The positioning member 4 can be reused after disassembly and assembly.

[0080] In order to press the positioning member 4 more conveniently on the filtering member 3, in some embodiments, as Figure 10 shown,Figure 10 This is a partial structural schematic diagram of a filtering unit 100 provided by an embodiment of the present application. The filter element 3 may include a filter core 32 and a frame 31. The frame 31 is located on the peripheral side of the filter core 32 and is arranged around the periphery of the filter core 32 for one week, and the filter core 32 is installed on the frame 31. Wherein, a recess 311 is formed on one side of the frame 31 close to the positioning member 4, and the recess 311 is annular. The positioning member 4 is located within the recess 311.

[0081] In this way, the recess 311 can play a guiding role in the installation of the positioning member 4. At the same time, the positioning member 4 can be completely abutted against the filter element 3, and it will not occur that a part of the positioning member 4 is not abutted against the filter element 3 due to the offset of the position between the positioning member 4 and the filter element 3, so that air leakage occurs in the part of the filter element 3 that is not pressed by the positioning member 4.

[0082] Exemplarily, the filter core 32 may be composed of chemical fibers. The filtering function of the filter element 3 is mainly achieved by the filter core 32.

[0083] In some embodiments, as Figure 11 shown, Figure 11 This is a cross-sectional view of a filtering unit 100 provided by an embodiment of the present application. The filter core 32 may be corrugated. In this way, in the same installation space, compared with the ordinary design method, the corrugated filter core 32 can provide a larger effective filtering space. Thus, more polluted air can be filtered.

[0084] In some embodiments, as Figure 12 shown, Figure 12 This is a structural schematic diagram of a filtering unit 100 provided by an embodiment of the present application. The limiting member 5 includes a first limiting member 51 and a second limiting member 52. The first limiting member 51 is detachably connected to the side frame 11. The second limiting member 52 is connected to the first limiting member 51 and abuts against the positioning member 4.

[0085] Continuing to refer to Figure 12 , the second limiting member 52 abuts against the positioning member 4, and the positioning member 4 has a reaction force on the second limiting member 52. Since the second limiting member 52 is detachably connected to the first limiting member 51, the reaction force is transmitted to the first limiting member 51, and the first limiting member 51 is also connected to the side frame 11, thereby restricting the movement of the limiting member 5 along the direction of the reaction force. Ensure that the limiting member 5 continuously applies pressure to the positioning member 4, thereby ensuring the sealing performance.

[0086] As Figure 13 shown, Figure 13A partial cross-sectional view of a filtering unit 100 provided by an embodiment of the present application. A foot pad 521 may be provided at one end of the second limiting member 52 that abuts against the positioning member 4, and the foot pad 521 is sleeved on one end of the second limiting member 52 that abuts against the positioning member 4. Exemplarily, the foot pad 521 has a T-shaped structure and is made of a rubber material. On the one hand, it plays a role in increasing the abutting area, and on the other hand, it increases the friction between the second limiting member 52 and the positioning member 4, making it not easy to displace.

[0087] Among them, in order to achieve the detachable connection between the second limiting member 52 and the first limiting member 51, there are various forms of connection between the second limiting member 52 and the first limiting member 51.

[0088] In some embodiments, as Figure 14 shown, Figure 14 A schematic structural diagram of a limiting member 5 provided by an embodiment of the present application. The first limiting member 51 is provided with a mounting hole 511. The second limiting member 52 passes through the mounting hole 511 and is threadedly connected to the first limiting member 51 (threads are not shown in the figure).

[0089] By threadedly connecting the second limiting member 52 and the first limiting member 51, on the one hand, the relative positions of the second limiting member 52 and the first limiting member 51 can be kept fixed, and the second limiting member 52 and the first limiting member 51 can transmit force to each other. On the other hand, as Figure 12 shown, since the first limiting member 51 is connected to the side frame 11. Therefore, by screwing the second limiting member 52 along the thread direction (not shown in the figure), the distance between the second limiting member 52 between the first limiting member 51 and the positioning member 4 is increased, and through the reaction force of the first limiting member 51 on the second limiting member 52, the second limiting member 52 exerts a greater pressure on the positioning member 4.

[0090] In addition, the detachable connection between the second limiting member 52 and the first limiting member 51 can also be other ways such as snap connection, which will not be elaborated here.

[0091] In some embodiments, as Figure 12 shown, an installation portion 112 is formed on the inner side of the side frame 11. The installation portion 112 is located on the side of the positioning member 4 ( Figure 13 ) away from the filtering member 3 ( Figure 13 ).

[0092] As Figure 15 shown, Figure 15 A schematic structural diagram of a filtering frame 1 provided by an embodiment of the present application. A limiting groove 1121 is formed on the side of the installation portion 112 close to the filtering member 3 ( Figure 12 ).

[0093] As Figure 16 shown, Figure 16A partial cross-sectional view of a filtering unit 100 provided by an embodiment of the present application. The first limiting member 51 is clamped with the limiting groove 1121, so that a part of the first limiting member 51 is located in the limiting groove 1121. The installation portion 112 restricts the movement of the first limiting member 51 away from the filtering member 3, and at the same time connects the first limiting member 51 with the side frame 11, and the force can be transmitted to each other.

[0094] In some embodiments, as Figure 17 shown, Figure 17 A partial structural schematic diagram of a filter 1000 provided by an embodiment of the present application. The filter 1000 further includes a seal 6, and the seal 6 is annular.

[0095] As Figure 18 shown, Figure 18 A partial cross-sectional view of a filtering unit 100 provided by an embodiment of the present application. The seal 6 is arranged between the filtering member 3 and the bottom frame 12. Exemplarily, the material of the seal 6 can be foaming materials such as silica gel and polyethylene. The above-mentioned foaming materials have certain softness and plasticity, can adapt to irregular surfaces, fill the gaps between the filtering member 3 and the bottom frame 12, and form a tighter seal.

[0096] The seal 6 is arranged on the bottom frame 12 and is respectively attached to the periphery of the bottom frame 12 and the filtering member 3. Exemplarily, the surface of the seal 6 attached to the bottom frame 12 is bonded with glue.

[0097] If the filtering member 3 is used in high-risk occasions such as medical treatment, the filtered air may contain pathogenic elements such as bacteria and viruses. The simplest treatment method for the replaced filtering member 3 is incineration. The remaining treatment methods not only have higher costs, but also may cause the leakage of the source of infection during the treatment process.

[0098] Based on this, in some embodiments, the frame 31 is made of paper material. The remaining part of the filtering member 3 also uses combustible materials. In this way, it can be completely incinerated after incineration treatment, and there will be no other flame-retardant or non-combustible materials remaining.

[0099] In the description of this specification, specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0100] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A filter, characterized in that: include: Filter unit, comprising: A filter frame, the filter frame comprising a side frame and a bottom frame; the side frame is located at one side of the bottom frame and is arranged around the periphery of the bottom frame; the bottom frame is provided with ventilation holes; A filter element, the filter element is arranged on a side of the bottom frame close to the side frame, is located inside the side frame, and covers the ventilation hole; A positioning member, the positioning member is located at a side of the filter member away from the bottom frame, is arranged around the periphery of the filter member, and abuts against the filter member; and The limiting member is connected to the side frame, is located on a side of the positioning member away from the filter member, and abuts against the positioning member.

2. The filter according to claim 1, characterized in that The filter element includes a filter element and a frame; the frame is located on the peripheral side of the filter element and is arranged around the periphery of the filter element; the filter element is installed on the frame; wherein a recessed portion is formed on one side of the frame close to the positioning member, and the recessed portion is annular; the positioning member is located in the recessed portion.

3. The filter according to claim 1, characterized in that There are multiple limit members, and the multiple limit members are arranged at intervals along the circumference of the positioning member and are arranged around the positioning member.

4. The filter according to claim 3, characterized in that The limiting member comprises: A first stopper, wherein the first stopper is detachably connected to the side frame; and A second limiting member, wherein the second limiting member is connected to the first limiting member and abuts against the positioning member.

5. The filter according to claim 4, characterized in that The first limiting member is provided with a mounting hole; the second limiting member is passed through the mounting hole and is threadedly connected to the first limiting member.

6. The filter according to claim 5, characterized in that A mounting portion is formed on the inner side of the side frame; the mounting portion is located on a side of the positioning member away from the filter element; a limiting groove is formed on a side of the mounting portion close to the filter element; a portion of the first limiting member is located in the limiting groove.

7. The filter according to claim 1, characterized in that The filter also includes: The sealing member is annular and is disposed between the filter element and the bottom frame, and is disposed on the bottom frame, and is respectively fitted with the bottom frame and the periphery of the filter element.

8. The filter according to claim 2, characterized in that The frame is made of paper material.

9. The filter according to claim 1, characterized in that There are multiple filter units; the multiple filter units are arranged in multiple rows along the first direction, and each row has multiple filter units distributed along the second direction; wherein two adjacent filter units are detachably connected, and the first direction is perpendicular to the second direction.

10. The filter according to claim 8, characterized in that The side frame is provided with a connection hole; the filter further comprises: A plurality of fasteners are provided, wherein the fasteners are inserted into the connection holes of two adjacent side frames, and the two adjacent side frames are connected to each other through the fasteners.

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