Filter screen assembly and range hood

Abstract

The embodiment of the invention provides a filter screen assembly and a range hood, and the filter screen assembly comprises a first filter screen which comprises a plurality of first folding surfaces, each first folding surface is provided with at least one first hole, and any two adjacent first folding surfaces are not overlapped; the second filter screen and the first filter screen are arranged at intervals, the second filter screen comprises a plurality of second folding surfaces, each second folding surface is provided with at least one second hole, and any two adjacent second folding surfaces are not overlapped. According to the technical scheme, the double-layer filter screen is adopted, and the noise reduction effect and the oil-smoke separation effect can be effectively considered.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and more particularly, to a filter assembly and a range hood. Background Art

[0002] Currently, during the use of range hoods by users, the noise generated by the fan is relatively large, and a better grease separation effect cannot be achieved. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] In view of this, an embodiment of the first aspect of the present invention provides a filter assembly.

[0005] An embodiment of the second aspect of the present invention provides a range hood.

[0006] To achieve the above object, an embodiment of the first aspect of the present invention provides a filter assembly, including: a first filter, including a plurality of first folding surfaces, at least one first hole is provided on each first folding surface, and any two adjacent first folding surfaces do not overlap; a second filter, spaced apart from the first filter, the second filter includes a plurality of second folding surfaces, at least one second hole is provided on each second folding surface, and any two adjacent second folding surfaces do not overlap.

[0007] According to the filter assembly proposed by the present invention, it mainly includes a first filter and a second filter which are spaced apart. They are both composed of a plurality of non-overlapping folding surfaces, and at least one hole is provided on each folding surface. Since the folding surfaces of the first filter and the second filter do not overlap, this structure increases the collision probability of grease and particulate matter when passing through the filter, thereby improving the filtration efficiency. It can be understood that the design of a plurality of folding surfaces means an increase in the surface area of the filter, which helps to capture more grease and provides a larger air circulation area.

[0008] Of course, the first filter and the second filter which are spaced apart can allow air to pass through more smoothly, reduce the air flow resistance, and thus may reduce the fan load and energy consumption. The holes on the folding surfaces of the filter can serve as a sound wave diffusion and absorption structure, which helps to reduce noise.

[0009] By providing a first filter and a second filter which are spaced apart, high-efficiency grease separation and noise reduction effects can be provided, and a more convenient maintenance experience and more added value can also be brought, so as to stand out in the market.

[0010] Wherein, the relative positions between the first filter and the second filter are fixed, so as to ensure the stability of the structure.

[0011] It can be understood that under the action of the first filter screen and the second filter screen, the problems of traditional range hoods in oil separation and noise control can be effectively solved. Specifically, through the innovation of the physical structure, more efficient oil separation is achieved, reducing the chance of oil entering the fan, thereby extending the life of the fan. In addition, through the principle of acoustic maze, the double-layer folding design not only reduces oil but also effectively reduces noise, improving the user's cooking and home communication experience.

[0012] In some technical solutions, optionally, it further includes: a frame body, and both ends of the first filter screen are respectively connected to the side walls of the frame body along the first direction.

[0013] In this technical solution, the frame body serves as the support structure of the filter screen assembly, providing the function of fixing the first filter screen. The frame body provides a stable support for the first filter screen, ensuring that it maintains the correct position and shape during operation. By connecting both ends of the first filter screen to the side walls of the frame body, the stability of the filter screen assembly inside the range hood can be guaranteed, avoiding vibration or displacement during the air suction process.

[0014] It can be understood that the frame body can simplify the installation and disassembly process of the filter screen, facilitating the user's cleaning and maintenance, and the design of the frame body may help guide the air to flow in a specific direction, thereby improving the filtration efficiency and reducing the fan load.

[0015] In some technical solutions, optionally, the frame body is in the shape of a cuboid, the frame body includes a first side plate extending along the first direction and a second side plate extending along the second direction, and both ends of the first filter screen are respectively connected to one second side plate.

[0016] In this technical solution, the cuboid shape design of the frame body and the structural layout of the first side plate and the second side plate provide the basis for the shape and directionality of the filter screen assembly. The layout of the first side plate and the second side plate determines the spatial directionality of the filter screen assembly, helping to correctly guide the air flow. At the same time, the cuboid structure provides a large contact surface, which helps to fix and stabilize the position of the filter screen assembly inside the range hood.

[0017] It can be understood that the standardized cuboid shape and side plate design simplify the assembly process, making it easier to install the filter screen assembly into the range hood.

[0018] In some technical solutions, optionally, the frame body and the first filter screen are integrally formed, and the second filter screen is detachably connected to the frame body.

[0019] In this technical solution, the frame body and the first filter are integrally formed, and the second filter is detachably connected to the frame body. The integrally formed design ensures a seamless connection between the first filter and the frame body, and enhances the overall structural stability and durability. Of course, since the frame body and the first filter are integrally formed, the number of components required is reduced, and the assembly and production process is simplified.

[0020] Since the second filter can be removed from the frame body, it is convenient for users to clean and replace it regularly, and maintenance is more convenient.

[0021] Of course, the one-piece molding production process can reduce manufacturing costs, reduce production links and improve production efficiency.

[0022] The one-piece molding process includes but is not limited to injection molding, metal die-casting or 3D printing, etc. The detachable connection mechanism between the second filter screen and the frame body includes but is not limited to quick plug-in, magnetic adsorption or fasteners, etc.

[0023] In some technical solutions, optionally, the first filter screen and the second filter screen are made of different materials.

[0024] In this technical solution, the first filter and the second filter are designed with different materials to combine their respective advantages. For example, the material of the first filter may focus more on high temperature resistance and structural stability, while the material of the second filter may be easier to clean or have a better filtering effect. In addition, filters of different materials can achieve phased filtration. The first filter may be responsible for capturing large particles of grease, while the second filter is responsible for filtering finer particles.

[0025] Furthermore, the selection of different materials can be used for cost optimization according to the function and location of the filter, using a more suitable but lower cost material.

[0026] At the same time, by matching different materials, air flow can be optimized, resistance can be reduced, and noise can be reduced through the sound-absorbing properties of the material.

[0027] In some technical solutions, optionally, the first filter screen is made of plastic and the second filter screen is made of metal.

[0028] In this technical solution, plastic is used as the material of the first filter, which usually has good corrosion resistance and is suitable for environments exposed to oil smoke, while metal materials can withstand higher temperatures and are suitable for use near heat sources. The metal filter provides higher mechanical strength and stability and is suitable for long-term use; the plastic filter may be lighter and easier to install and remove.

[0029] Additionally, plastic filters are generally easy to clean and can be washed with water or cleaned with chemical cleaners to remove oil stains; metal filters may require special cleaning methods, such as steam or hot water cleaning.

[0030] Optionally, the first filter screen adopts the BMC plastic injection molding process, which can achieve complex folded and misaligned shapes, improve the grease separation effect, and contribute to the shape design of the air inlet. The second filter screen is made of sheet metal material, and the air inlet area is increased by folding and opening holes, and it assists in grease separation.

[0031] In some technical solutions, optionally, the first folding surface and the second folding surface are arranged relatively parallel.

[0032] In this technical solution, the relatively parallel arrangement can increase the chance of contact between the oil fume and the surface of the filter screen, and improve the efficiency of capturing oil droplets and particulate matters. At the same time, the parallel structure helps to maintain the airflow stability when passing through the filter screen, reduce the airflow turbulence, and is beneficial to reducing noise and improving the suction efficiency.

[0033] Of course, the parallel folding surface layout can maximize the effective filtration area of the filter screen within a limited space. The relatively parallel folding surfaces are also easier to clean because the grease and particulate matters are easier to be removed on the parallel surfaces.

[0034] It can be understood that through the above parallel arrangement, the double-layer filter screen solution can not only improve the oil fume separation efficiency, but also optimize the airflow management and reduce the noise, and increase the convenience of user cleaning and maintenance. This design helps to improve the comprehensive performance and market competitiveness of the product.

[0035] In some technical solutions, optionally, the first folding surface is a flat surface; and / or the second folding surface is a flat surface.

[0036] In this technical solution, at least one of the first folding surface and the second folding surface can be selected as a flat surface. The flat folding surface simplifies the production process, is easy to manufacture and standardize, and helps to reduce the cost. It can be understood that the flat folding surface is easier to clean because there is no complex concave-convex structure, and the oil stain and particles are easier to wipe or rinse clean. The flat structure can provide a stable airflow path, reduce the airflow turbulence, help to evenly distribute the airflow, and improve the overall efficiency of the range hood.

[0037] The flat folding surface design can increase the grease capture efficiency by increasing the number or layers of the filter screen while maintaining a low airflow resistance.

[0038] In some technical solutions, optionally, the first folding surface is a curved surface; and / or the second folding surface is a curved surface.

[0039] In this technical solution, at least one of the first folding surface and the second folding surface can be selected as a curved surface. The curved surface design can increase the contact between the oil fume and the surface of the filter screen, change the airflow direction, and improve the trapping efficiency of grease and particulate matters. The curved surface has better structural strength than the flat surface and can better withstand pressure and impact.

[0040] In addition, the curved surface can guide the air flow to flow more smoothly, reduce air flow turbulence and noise, and improve the efficiency of the fan.

[0041] An embodiment of the second aspect of the present invention provides a range hood, including: a main body structure, in which a fan is provided; the filter screen assembly of the above-mentioned first aspect embodiment, which is detachably connected to the main body structure, and the first filter screen of the filter screen assembly is arranged away from the fan, and the second filter screen of the filter screen assembly is arranged close to the fan.

[0042] The range hood proposed according to the present invention includes a main body structure and the above-mentioned filter screen assembly. A fan is arranged in the main body structure. The filter screen assembly includes two filter screens with different materials and shapes. The first filter screen is arranged away from the fan, while the second filter screen is arranged close to the fan, so as to achieve staged filtration. First, the large-particle grease and impurities are preliminarily intercepted by the first filter screen, and then the second filter screen captures finer particles, protecting the fan from grease pollution.

[0043] In addition, the position of the second filter screen close to the fan helps to perform final purification before the fan inhales air, ensuring the clean operation of the fan and extending its service life.

[0044] Of course, since the filter screen assembly is detachably connected to the main body structure, it is convenient for users to clean and replace the filter screen regularly, maintaining the efficient operation of the range hood.

[0045] Through the above distribution, the setting of the filter screen assembly also helps to reduce the operating noise. In particular, the position of the second filter screen close to the fan can reduce the generation of noise when the fan inhales air.

[0046] Since the range hood includes a filter screen assembly, it has the beneficial effects of any filter screen assembly in the above-mentioned first aspect embodiment, which will not be elaborated here.

[0047] The additional aspects and advantages of the present invention will become apparent in the following description section or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 The structural schematic diagram of the filter screen assembly according to an embodiment of the present invention is shown;

[0049] Figure 2 The structural schematic diagram of the filter screen assembly according to an embodiment of the present invention is shown;

[0050] Figure 3 The structural schematic diagram of the second filter screen according to an embodiment of the present invention is shown;

[0051] Figure 4 The structural schematic diagram of the first filter screen and the frame body according to an embodiment of the present invention is shown;

[0052] Figure 5 The structural schematic diagram of a range hood according to an embodiment of the present invention is shown.

[0053] Among them, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0054] 100: Filter screen assembly; 102: First filter screen; 1022: First folding surface; 1024: First hole; 104: Second filter screen; 1042: Second folding surface; 1044: Second hole; 106: Frame main body; 1062: First side plate; 1064: Second side plate;

[0055] 200: Range hood; 202: Main body structure; 2022: Fan. Specific embodiments

[0056] In order to more clearly understand the above-mentioned objects, features, and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0057] In the following description, many specific details are set forth in order to fully understand the present application. However, the embodiments of the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited to the limitations of the specific embodiments disclosed below.

[0058] The following refers to Figures 1 to 5 Describe some embodiments according to the present invention.

[0059] As Figure 1 , Figure 3 and Figure 4 shown, a filter screen assembly 100 proposed in this embodiment mainly includes a first filter screen 102 and a second filter screen 104 arranged at intervals. They are both composed of a plurality of non-overlapping folding surfaces, and at least one hole is provided on each folding surface, that is, one or more first holes 1024 are provided on the first folding surface, and one or more second holes 1044 are provided on the second folding surface. Since the folding surfaces of the first filter screen 102 and the second filter screen 104 do not overlap, this structure increases the collision probability of grease and particulate matter when passing through the filter screen, thereby improving the filtration efficiency. It can be understood that the design of multiple folding surfaces means that the surface area of the filter screen increases, which helps to capture more grease and provides a larger air circulation area.

[0060] Of course, the first filter screen 102 and the second filter screen 104 arranged at intervals can allow air to pass through more smoothly, reduce the air flow resistance, and thus may reduce the load and energy consumption of the fan 2022. The holes on the folding surface of the filter screen can be used as a sound wave diffusion and absorption structure, which helps to reduce noise.

[0061] By setting the first filter screen 102 and the second filter screen 104 with an interval, efficient oil separation and noise reduction effects can be provided, and a more convenient maintenance experience and more added value can also be brought, thus standing out in the market.

[0062] Wherein, the relative positions between the first filter screen 102 and the second filter screen 104 are fixed, thus ensuring the stability of the structure.

[0063] It can be understood that under the action of the first filter screen 102 and the second filter screen 104, the problems of traditional range hoods in oil separation and noise control can be effectively solved. Specifically, through the innovation of the physical structure, more efficient oil separation is achieved, reducing the chance of oil entering the fan 2022, thereby extending the service life of the fan 2022. In addition, through the principle of acoustic maze, the double-layer folding design effectively reduces noise while reducing oil, improving the user's cooking and home communication experience.

[0064] In one embodiment, optionally, the frame body 106 serves as the support structure of the filter screen assembly 100, providing the function of fixing the first filter screen 102. The frame body 106 provides a stable support for the first filter screen 102, ensuring that it maintains the correct position and shape during operation. By connecting the two ends of the first filter screen 102 to the side walls of the frame body 106, the stability of the filter screen assembly 100 inside the range hood 200 can be ensured, avoiding vibration or displacement during the air suction process.

[0065] It can be understood that the frame body 106 can simplify the installation and disassembly process of the filter screen, facilitating the user to clean and maintain, and the design of the frame body 106 may help to guide the air to flow in a specific direction, thereby improving the filtration efficiency and reducing the load on the fan 2022.

[0066] In one embodiment, optionally, as Figure 2 shown, the cuboid shape design of the frame body 106 and the structural layout of the first side plate 1062 and the second side plate 1064 provide the basis for the shape and directionality of the filter screen assembly 100. As Figure 1 shown, the first side plate 1062 extends along the first direction, and the second side plate 1064 extends along the second direction. The layout of the first side plate 1062 and the second side plate 1064 determines the spatial directionality of the filter screen assembly 100, helping to correctly guide the air flow. At the same time, the cuboid structure provides a large contact surface, helping to fix and stabilize the position of the filter screen assembly 100 inside the range hood 200.

[0067] It can be understood that the standardized cuboid shape and side plate design simplify the assembly process, making it easier to install the filter screen assembly 100 into the range hood 200.

[0068] In one embodiment, optionally, the frame body 106 and the first filter screen 102 are integrally formed, and the second filter screen 104 is detachably connected to the frame body 106. The integrally formed design ensures a seamless connection between the first filter screen 102 and the frame body 106, thereby enhancing the overall structural stability and durability. Of course, since the frame body 106 and the first filter screen 102 are integrally formed, the number of components required is reduced, and the assembly and production process is further simplified.

[0069] Since the second filter screen 104 can be removed from the frame body 106, it is convenient for users to customize the filter screen 104.

[0070] Periodic cleaning and replacement make maintenance more convenient.

[0071] Of course, the one-piece molding production process can reduce manufacturing costs, reduce production links and improve production efficiency.

[0072] The one-piece molding process includes but is not limited to injection molding, metal die-casting or 3D printing, etc. The detachable connection mechanism between the second filter screen 104 and the frame body 106 includes but is not limited to quick plug-in, magnetic adsorption or fasteners, etc.

[0073] In one embodiment, the first filter 102 and the second filter 104 may be designed with different materials to combine their respective advantages. For example, the material of the first filter 102 may focus more on high temperature resistance and structural stability, while the material of the second filter 104 may be easier to clean or have a better filtering effect. In addition, filters of different materials can achieve phased filtration. The first filter 102 may be responsible for capturing large particles of grease, while the second filter 104 is responsible for filtering finer particles.

[0074] Furthermore, the selection of different materials can be used for cost optimization according to the function and location of the filter, using a more suitable but lower cost material.

[0075] At the same time, by matching different materials, air flow can be optimized, resistance can be reduced, and noise can be reduced through the sound-absorbing properties of the material.

[0076] In one embodiment, plastic is optionally used as the material of the first filter 102, which generally has good corrosion resistance and is suitable for environments exposed to oil smoke, while metal materials can withstand higher temperatures and are suitable for use near heat sources. The metal filter provides higher mechanical strength and stability and is suitable for long-term use; the plastic filter may be lighter and easier to install and remove.

[0077] Additionally, plastic filters are generally easy to clean and can be washed with water or cleaned with chemical cleaners to remove oil stains; metal filters may require special cleaning methods, such as steam or hot water cleaning.

[0078] Optionally, the first filter screen 102 adopts the BMC plastic injection molding process, which can achieve complex folded and misaligned shapes, improve the grease separation effect, and contribute to the shape design of the air inlet. The second filter screen 104 adopts sheet metal material, and increases the air inlet area by folding and opening holes, and assists in grease separation.

[0079] In one embodiment, optionally, the first folding surface 1022 and the second folding surface 1042 are arranged relatively parallel. The relatively parallel arrangement can increase the chance of contact between the cooking fume and the surface of the filter screen, and improve the efficiency of capturing oil droplets and particulate matters. At the same time, the parallel structure helps to maintain the stability of the air flow when passing through the filter screen, reduce the air flow turbulence, and is beneficial to reducing noise and improving the suction efficiency.

[0080] Of course, the parallel folding surface layout can maximize the effective filtering area of the filter screen in a limited space. The relatively parallel folding surfaces are also easier to clean because the grease and particulate matters are more easily removed on the parallel surfaces.

[0081] It can be understood that through the above parallel arrangement, the double-layer filter screen solution can not only improve the cooking fume separation efficiency, but also optimize the air flow management and reduce noise, and increase the convenience of user cleaning and maintenance. This design helps to improve the comprehensive performance and market competitiveness of the product.

[0082] In one embodiment, optionally, at least one of the first folding surface 1022 and the second folding surface 1042 can be selected as a flat surface. The flat folding surface simplifies the production process, is easy to manufacture and standardize, and helps to reduce costs. It can be understood that the flat folding surface is easier to clean because there is no complex concave-convex structure, and the oil stains and particles are easier to wipe or rinse clean. The flat structure can provide a stable air flow path, reduce the air flow turbulence, help to evenly distribute the air flow, and improve the overall efficiency of the range hood.

[0083] The flat folding surface design can increase the grease capture efficiency by increasing the number or layers of the filter screen while maintaining a low air flow resistance.

[0084] In one embodiment, optionally, at least one of the first folding surface 1022 and the second folding surface 1042 can be selected as a curved surface. The curved surface design can increase the contact between the cooking fume and the surface of the filter screen, change the air flow direction, and improve the capture efficiency of grease and particulate matters. The curved surface has better structural strength than the flat surface and can better withstand pressure and impact.

[0085] In addition, the curved surface can guide the air flow to flow more smoothly, reduce the air flow turbulence and noise, and improve the efficiency of the fan 2022.

[0086] Such as Figure 5As shown in the figure, this embodiment proposes an oil fume extractor 200, which includes a main body structure 202 and the above-mentioned filter screen assembly 100. A blower 2022 is arranged inside the main body structure 202. The filter screen assembly 100 includes two filter screens made of different materials and with different shapes. The first filter screen 102 is arranged away from the blower 2022, while the second filter screen 104 is arranged close to the blower 2022, so as to achieve staged filtration. First, the large-particle grease and impurities are preliminarily intercepted by the first filter screen 102, and then the finer particles are captured by the second filter screen 104 to protect the blower 2022 from grease pollution.

[0087] In addition, the position of the second filter screen 104 close to the blower 2022 helps to perform final purification before the blower 2022 inhales air, ensuring the clean operation of the blower 2022 and extending its service life.

[0088] Of course, since the filter screen assembly 100 is detachably connected to the main body structure 202, it is convenient for users to clean and replace the filter screen regularly, maintaining the efficient operation of the oil fume extractor 200.

[0089] Through the above distribution, the setting of the filter screen assembly 100 also helps to reduce the operating noise. In particular, the position of the second filter screen 104 close to the blower 2022 can reduce the generation of noise when the blower 2022 inhales air.

[0090] Since the oil fume extractor 200 includes the filter screen assembly 100, it has the beneficial effects of any of the filter screen assemblies 100 in the first aspect of the above embodiments, which will not be elaborated here.

[0091] In a specific embodiment, a double-layer folding and misaligned oil filtering net structure for an oil fume extractor is proposed to achieve a better front-stage oil separation effect, enabling better front-stage oil collection, extending the service life of the blower, and making the performance of the oil fume extractor more long-lasting. Through the double-layer folding and misalignment of the oil net and the separation of the mesh holes, the noise gradually disappears between the double-layer oil nets, thus achieving a better noise reduction effect and bringing a better cooking experience to users. Specifically, the first-layer oil net is formed by BMC plastic injection molding, which can meet the requirements of the folding and misaligned form and the shape of the special-shaped oil net. The second layer adopts the form of sheet metal folding and punching to increase the air intake area. The two are combined to form a new process double-layer oil net mechanism. The two-layer folding oil nets are assembled with misaligned mesh openings. When the blower noise exits, it gradually disappears between the first-layer oil net and the second-layer oil net, and finally the sound transmitted to the user's ears through the first-layer oil net is extremely small, achieving a better noise reduction effect.

[0092] Through the design of the above filter screen, a better front-stage oil separation effect is achieved, enabling better front-stage oil collection, extending the service life of the blower, and making the performance of the oil fume extractor more long-lasting.

[0093] According to the filter screen assembly and the range hood provided by the present invention, a double-layer filter screen is adopted, which can effectively balance the noise reduction effect and the oil fume separation effect.

[0094] In the present invention, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] 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", etc. is based on the orientation or positional relationship shown in the 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 unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

[0096] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0097] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A filter screen assembly, characterized in that, include: A first filter screen comprises a plurality of first folded surfaces, each of which is provided with at least one first hole, and any two adjacent first folded surfaces do not overlap; The second filter screen is spaced apart from the first filter screen, and the second filter screen includes a plurality of second folded surfaces, each of the second folded surfaces is provided with at least one second hole, and any two adjacent second folded surfaces do not overlap.

2. The filter assembly according to claim 1, wherein Also includes: The frame body, two ends of the first filter screen are respectively connected to the side walls of the frame body along the first direction.

3. The filter assembly according to claim 2, wherein The frame body is in a rectangular parallelepiped shape and includes a first side plate extending along the first direction and a second side plate extending along the second direction. Both ends of the first filter are respectively connected to one of the second side plates.

4. The filter assembly according to claim 2, wherein The frame body and the first filter screen are integrally formed, and the second filter screen is detachably connected to the frame body.

5. The filter assembly according to claim 1, characterized in that: The first filter screen and the second filter screen are made of different materials.

6. The filter assembly according to claim 5, characterized in that: The first filter screen is made of plastic, and the second filter screen is made of metal.

7. The filter assembly according to any one of claims 1 to 6, characterized in that: The first folding surface and the second folding surface are arranged relatively parallel.

8. The filter assembly according to any one of claims 1 to 6, characterized in that: The first folding surface is a plane; and / or The second folding surface is a plane.

9. The filter assembly according to any one of claims 1 to 6, characterized in that: The first folding surface is a curved surface; and / or The second folding surface is a curved surface.

10. A range hood, characterized in that: include: A main structure, wherein a fan is provided in the main structure; The filter assembly as described in any one of claims 1 to 9 is detachably connected to the main structure, and the first filter of the filter assembly is arranged away from the fan, and the second filter of the filter assembly is arranged close to the fan.

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