Filter assembly for dust removal equipment and portable dust removal equipment

Abstract

The embodiment of the utility model relates to the technical field of cleaning appliances, and particularly discloses a filter assembly for dust removal equipment and portable dust removal equipment, the filter assembly for the dust removal equipment comprises a shell, the shell is a handheld mini shell, a cavity is arranged in the shell, and a filter element is arranged in the cavity. A dust collection opening communicated with the outside is formed in one end of the cavity; the first filtering piece is contained in the cavity and located at the end close to the dust suction opening; the second filtering piece is connected to the other end, far away from the dust suction opening, of the first filtering piece and is fixedly connected with the inner side of the shell; wherein the first filtering piece and the second filtering piece are used for conducting double filtering on airflow which is sucked into the cavity and carries dust particles, and the types of the dust particles filtered by the first filtering piece and the second filtering piece are different. Through the reasonable structural design of the filtering assembly, effective filtering of various dust particle types is achieved, and the dust collector is suitable for various cleaning scenes, so that powerful cleaning can be achieved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of cleaning tools, and in particular to a filter assembly for dust removal equipment and a portable dust removal equipment. Background Art

[0002] Vacuum cleaners are a type of cleaning device widely used in daily life and industrial production. They operate by using an electric motor to drive the blades to rotate at high speed, creating negative pressure within a sealed housing. This pressure then draws in dust-laden air through an external suction pipe. A filter within the vacuum cleaner separates dust from the airflow, storing it within the vacuum cleaner. The airflow free of dust is then released back into the atmosphere, achieving a cleansing effect.

[0003] However, currently, common handheld vacuum cleaners are typically designed with a single filter layer, making them inadequate for diverse cleaning needs. This can lead to low filtration efficiency or clogging when handling various types of waste. Therefore, developing a multi-layered filter assembly that effectively filters different types of waste is crucial. Utility Model Content

[0004] Based on this, it is necessary to provide a filter component for dust removal equipment and a portable dust removal equipment with high filtering efficiency and capable of providing multiple filtration during the cleaning process to address the above technical problems.

[0005] The present invention provides a filter assembly for dust removal equipment, comprising:

[0006] The housing is a hand-held mini housing having a cavity inside and a suction port connected to the outside world at one end of the cavity;

[0007] a first filter element, the first filter element being received in the cavity and located at one end close to the suction port;

[0008] a second filter element, the second filter element being connected to the other end of the first filter element away from the dust suction port and being fixedly connected to the inner side of the housing;

[0009] The first filter element and the second filter element are used for dual filtering of the airflow carrying dust particles sucked into the cavity, and the first filter element and the second filter element filter different types of dust particles.

[0010] In one embodiment, an air outlet communicating with the outside is further provided at the other end of the cavity away from the dust suction port;

[0011] The filter assembly further includes a filter cotton housed in the cavity and located near one end of the air outlet; wherein the filter cotton is used to perform a third filtration on the airflow that has undergone double filtration, and the diameter of the dust particles filtered by the filter cotton is smaller than that of the first filter element and the second filter element; and / or

[0012] The filter assembly also includes sound-absorbing cotton accommodated in the cavity and located near one end of the air outlet; wherein the sound-absorbing cotton is used to reduce the noise of the airflow that has undergone double filtration to reduce the noise intensity when the airflow is discharged from the air outlet.

[0013] In one embodiment, an antibacterial agent and / or a chemical adsorbent is added to the filter cotton, and the sound-absorbing cotton is mineral wool or a sound-absorbing material is added to the sound-absorbing cotton;

[0014] The antibacterial agent is used to eliminate harmful bacteria in the airflow, and the chemical adsorbent is used to adsorb harmful gases in the airflow.

[0015] In one embodiment, the second filter element is a solid annular structure, and a plurality of through annular filter holes are provided on the upper and lower surfaces of the annular structure for filtering the second type of dust particles.

[0016] In one embodiment, the shape and size of the connection area between the first filter element and the second filter element are the same;

[0017] The diameter of the first type of dust particles filtered by the first filter element is greater than the diameter of the second type of dust particles filtered by the second filter element.

[0018] In one embodiment, the filter assembly further includes a mounting frame, and the first filter element and the second filter element are both fixedly connected to the housing via the mounting frame.

[0019] In one embodiment, the mounting bracket comprises:

[0020] a first mounting portion, wherein the first mounting portion is a circular columnar structure, and the first filter element and the second filter element are both sleeved on the first mounting portion;

[0021] a second mounting portion, the second mounting portion being a circular cylindrical structure having a diameter larger than that of the first mounting portion, and a cylindrical surface of the second mounting portion being fixedly connected to the housing;

[0022] A mounting plate, one end of which is connected to the first mounting portion, and the other end of which is connected to the second mounting portion, so as to fixedly connect the first mounting portion and the second mounting portion.

[0023] In one embodiment, the first mounting portion and the second mounting portion together enclose a receiving cavity of a circular cylindrical structure;

[0024] The shape and size of the accommodating cavity are the same as those of the second filter element, so as to accommodate at least a portion of the second filter element in the accommodating cavity.

[0025] An embodiment of the present application also provides a portable dust removal device, which includes the filter assembly for the dust removal device as described above, and is used to double filter the airflow carrying dust particles in the suction cavity.

[0026] The above-mentioned filter assembly for dust removal equipment and portable dust removal equipment, on the one hand, use a hand-held mini shell to store the first filter element and the second filter element in the cavity, which greatly reduces the physical volume of the dust removal equipment, making the equipment easy to carry and suitable for cleaning needs in various occasions, thereby improving the portability and operability of the dust removal equipment; on the other hand, in a way different from the existing technology, this solution realizes effective filtration of various types of dust particles through a reasonable structural design of the filter assembly. This design not only improves the filtration efficiency and service life of the dust removal equipment, but also optimizes the cleaning effect, and is suitable for a variety of cleaning scenarios, thereby enabling powerful cleaning.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0029] Figure 1 is a perspective schematic diagram of a filter assembly for dust removal equipment according to an exemplary embodiment;

[0030] Figure 2 is a schematic cross-sectional view showing a filter assembly for dust removal equipment according to an exemplary embodiment;

[0031] Figure 3 is a partially exploded schematic diagram of a filter assembly for dust removal equipment according to an exemplary embodiment;

[0032] Figure 4 is an overall schematic diagram of a first filter element according to an exemplary embodiment;

[0033] Figure 5 yes Figure 2 Enlarged schematic diagram of point G in the middle;

[0034] Figure 6 is an overall schematic diagram of an installation assembly according to an exemplary embodiment;

[0035] Figure 7 is a spatial decomposition diagram showing a mounting assembly and a filtering assembly according to an exemplary embodiment;

[0036] Figure 8 is an exploded schematic diagram of a filter assembly according to an exemplary embodiment;

[0037] Figure 9 is an overall schematic diagram of a filter assembly according to an exemplary embodiment;

[0038] Figure 10 is a perspective schematic diagram of a portable dust removal device according to an exemplary embodiment;

[0039] Figure 11 The figure is a cross-sectional schematic diagram showing a portable dust removal device according to an exemplary embodiment.

[0040] Among them, the figure numbers are: 10, filter assembly for dust removal equipment; 100, housing; 101, cavity; 101a, installation cavity; 101b, dust cavity; 102, dust suction port; 103, air outlet; 110, first housing; 120, second housing; 20, portable dust removal device; 200, first filter element; 201, first end of filter element; 202, second end of filter element; 210, waist-shaped filter hole; 220, reinforcement ring; 3 00, second filter element; 400, mounting bracket; 401, accommodating chamber; 410, first mounting portion; 420, second mounting portion; 421, annular groove; 422, handle portion; 430, mounting plate; 500, mounting assembly; 510, first fixing portion; 520, second fixing portion; 530, connecting portion; 600, filter cotton; 910, cleaning accessories; 920, driving source; 930, power supply assembly; 940, wind pressure assembly. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] The term "and / or" in the embodiments of the present application refers to any and all possible combinations of one or more of the associated enumerated items. It should also be noted that when used in this specification, "include / comprise" specifies the presence of the stated features, integers, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, elements and / or components and / or groups thereof, and is intended to cover non-exclusive situations. For example, a product or device comprising a series of units is not limited to the listed units, but optionally also includes units that are not listed, or optionally also includes other units inherent to these products or devices.

[0044] In addition, although the terms "first" and "second" are used many times in this application to describe various components, these components should not be limited by these terms. These terms are only used to distinguish one component from another, not to describe a specific order. For example, the first shell can be called the second shell, and the second shell can also be called the first shell. It is just that the scope of the two is different, and it does not deviate from the scope of this application. The first shell and the second shell are both outer shells configured in the portable dust removal device, but they are not outer shells of the same structural design.

[0045] In order to explain the technical content, technical steps, objectives and effects of this application in detail, the following is a detailed description in combination with the implementation methods and the accompanying drawings.

[0046] The filter assembly is a key component in cleaning equipment, effectively capturing and filtering a wide variety of waste and dirt. Traditional filtration systems, typically designed with a single filter layer, struggle to meet diverse cleaning needs and can suffer from low filtration efficiency or clogging when handling a wide range of waste types. Therefore, developing a multi-layered filter assembly that effectively filters diverse waste types is crucial.

[0047] The utility model provides a filter assembly 10 for dust removal equipment. Figures 1 to 4 The filter assembly 10 for dust removal equipment includes a housing 100, a first filter element 200, and a second filter element 300. The housing 100 is a handheld mini housing having a cavity 101 therein and a dust suction port 102 connected to the outside world at one end of the cavity 101. The first filter element 200 is housed in the cavity 101 and is located at one end close to the dust suction port 102. The second filter element 300 is connected to the other end of the first filter element 200 away from the dust suction port 102 and is fixedly connected to the inner side of the housing 100. The first filter element 200 and the second filter element 300 are used to perform dual filtration on the airflow carrying dust particles sucked into the cavity 101, and the first filter element 200 and the second filter element 300 filter different types of dust particles.

[0048] For the housing 100, please continue to refer to Figure 1 and Figure 2 The housing 100 of the filter assembly 10 for the dust removal device is a user-friendly handheld mini housing with a carefully designed structure, making it compact and easy to carry. A cavity 101 for cleaning is provided inside the housing 100, forming the basic framework of the dust removal device.

[0049] In some embodiments, as Figure 1 As shown, the appearance of the dust removal device is mainly presented by the shell 100. In order to facilitate the user to hold it, the shape of the shell 100 can be a slender cylindrical shell structure, and its size is also more miniaturized than the existing dust removal equipment, with a diameter of about 2.5 cm and a length of about 15 cm. That is, the shape and size of the dust removal device are slightly close to the pen used in daily life, which is conducive to the user holding and using this small and precise cleaning device.

[0050] In some embodiments, as Figure 2As shown, the housing 100 is a hollow structure, that is, a cavity 101 is provided inside the housing 100. A dust suction port 102 connected to the outside world is provided at one end of the cavity 101, and an air outlet 103 connected to the outside world is provided at the other end. The dust suction port 102 is close to the surface to be cleaned and is used to suck up the dust swept off the surface to be cleaned. The air outlet 103 is used to ensure smooth airflow to discharge the filtered air, thereby improving the overall cleaning efficiency of the device. At the same time, the miniature design of the cavity 101 ensures the flexibility of the device during use.

[0051] In some embodiments, the dust suction port 102 and the air outlet 103 are respectively arranged at the two ends of the shell 100, the cross-sectional shapes of the dust suction port 102 and the air outlet 103 are both circular, and the axes of the dust suction port 102, the air outlet 103 and the cavity 101 are in the same straight line.

[0052] In the embodiment of the present application, the cross-sections of the cavity 101, the dust suction port 102 and the air outlet 103 are circular in order to ensure uniform suction and keep the outer dimensions consistent without any difference in angle of use. In addition, the wall thickness of the shell 100 can be kept consistent, thereby ensuring the overall strength of the shell 100. In some embodiments, the cross-section of the cavity 101 can be elliptical or polygonal, and the cross-sections of the dust suction port 102 and the air outlet 103 can be waist-shaped or rectangular or other polygons, and the positions of the dust suction port 102 and the air outlet 103 can be set away from the axis of the cavity 101.

[0053] The specific shape and size of the housing 100 only need to be easy for the user to hold and more miniaturized than existing devices. This application does not make specific restrictions on it. For example, in other embodiments, the housing 100 can be a shell structure with an elliptical cross-section, or a relatively short and thick cylindrical shape with a larger diameter, and its specific size can also be other values.

[0054] In an embodiment of the present application, the axis of the shell 100 is the central axis direction of the cylindrical shell 100, and the airflow direction of the filter assembly 10 for the dust removal equipment during operation is parallel to the axis. In other embodiments, when the shell 100 is not cylindrical, the axis of the shell 100 is the extension direction of the main structure, and the airflow direction is parallel to the axis.

[0055] For further information, please refer to Figure 1 and Figure 2For the housing 100 in the above embodiment, the housing 100 also includes a detachable first shell 110 and a second shell 120. The first shell 110 and the second shell 120 together enclose a cavity 101, and the dust suction port 102 is provided at one end of the first shell 110 away from the second shell 120; wherein, the first filter element 200 and the second filter element 300 are installed in the first shell 110, and separate the cavity 101 into an installation cavity 101a and a dust cavity 101b.

[0056] Specifically, the housing 100 comprises a detachable first shell 110 and a second shell 120, which together enclose a cavity 101. This structural design aims to improve the maintainability and operational convenience of the device, while also making it easier for users to clean and maintain it after disassembly.

[0057] Furthermore, within chamber 101, first filter element 200 and second filter element 300 are installed within first housing 110. This assembly divides chamber 101 into two areas: installation chamber 101a and dust chamber 101b. This design streamlines the flow of air within the device and effectively separates impurities from clean air.

[0058] Furthermore, the dust suction port 102 is located at the end of the first housing 110 away from the second housing 120 to ensure that dirt and garbage are quickly sucked in during the cleaning process. Simultaneously, a clean airflow, passing through the first filter element 200 and the second filter element 300, is formed within the installation cavity 101a and finally discharged through the air outlet 103, ensuring that the released air is clean and pollution-free.

[0059] The separating action of the first filter element 200 and the second filter element 300 optimizes the airflow direction, allowing debris on the surface to be cleaned to be drawn into the cavity 101 through the suction port 102 and quickly enter the dust chamber 101b. This design effectively captures and stores impurities, significantly reducing the risk of impurities being recirculated into the environment with the airflow. At the same time, the filtered, clean airflow is smoothly discharged through the installation cavity 101a to the air outlet, thereby improving overall cleaning efficiency.

[0060] In some embodiments, the first shell 110 and the second shell 120 are both slender cylindrical structures with a diameter of 2.5 cm. The first shell 110 and the second shell 120 are fixed together by screws. In the assembled state, the length of the housing 100 is approximately 15 cm. The dust chamber 101b and the dust suction port 102 inside the shell are connected and coaxially arranged. The installation chamber 101a and the dust chamber 101b have the same cylindrical cross-sectional shape, while the dust suction port 102 has a circular cross-sectional shape.

[0061] The cross-sections of the mounting cavity 101a, the dust cavity 101b, and the dust suction port 102 are circular in order to achieve uniform suction, maintain a consistent and beautiful appearance, and maintain a consistent thickness of the housing 100. However, the specific shapes of the mounting cavity 101a, the dust cavity 101b, and the dust suction port 102 can also be other styles. For example, the cross-sections of the mounting cavity 101a and the dust cavity 101b can also be elliptical or polygonal, the cross-section of the dust suction port 102 can be waist-shaped or rectangular, and the position of the dust suction port 102 can be offset from the axis of the dust cavity 101b. In addition, in other embodiments, the first shell 110 and the second shell 120 can also be fixed by snapping or plugging, or opened and closed by a rotating shaft connection and a locking structure, which is not specifically limited here.

[0062] In addition, in the embodiment of the present application, the airflow direction refers to the direction in which the gas flows in the cavity 101, and the airflow direction is roughly the axial direction of the first shell 110 and the second shell 120. It will be slightly offset in the radial direction of the cavity 101 due to the blocking effect of the wind guide structure and internal parts at some positions of the cavity 101, and the airflow direction described when limiting the direction refers to the axial direction of the first shell 110 and the second shell 120, and the outer contour of the first shell 110 and the second shell 120 is cylindrical, and its axis is the central axis of the corresponding cylinder.

[0063] For the first filter element 200, please refer to Figures 2 to 4 The first filter element 200 is a hollow truncated cone structure, and a plurality of intervally arranged waist-shaped filter holes 210 are provided on the surface of the truncated cone structure for filtering the first type of dust particles.

[0064] In some embodiments, the first filter element 200 is made of stainless steel, and the axis of its conical annular side coincides with the axis of the first shell 110. The first filter element 200 has a plurality of waist-shaped filter holes 210 arranged in a circular array along the direction of the airflow, and perpendicular to the direction of the airflow, the short axis of the waist-shaped filter hole 210 and the thickness direction of the ring are set at a certain angle, thereby ensuring the area of ​​the waist-shaped filter hole 210 while reducing the diameter of the filter particles, thereby obtaining a better filtering effect.

[0065] The first filter element 200 is made of stainless steel to ensure its strength and corrosion resistance, making it washable and reusable. In other embodiments, the first filter element 200 may be made of other materials such as metal or plastic. Furthermore, to facilitate the dumping of garbage and reduce the probability of garbage falling when the user opens the dust chamber 101b, the distance between the first end 201 of the first filter element 200 and the dust suction port 102 is smaller than the distance between the second end 202 of the first filter element 200 and the dust suction port 102. However, in other embodiments, the distance between the first end 201 and the dust suction port 102 is greater than the distance between the second end 202 and the dust suction port 102. This means that the first filter element 200 in the present embodiment is flipped in the direction of airflow.

[0066] The design of the first filter element 200 focuses on effectively capturing larger particles of waste, such as debris and dust, and preventing them from entering the finer filter layers, thereby ensuring the cleanliness and service life of subsequent filters. Therefore, the kidney-shaped filter holes in the first filter element 200 are a preferred embodiment of this application. In other embodiments, the kidney-shaped filter holes 210 in the first filter element 200 can also be circular or have other geometric shapes, which are not specifically limited here.

[0067] For the second filter element 300, please refer to Figure 2 and Figure 3 The second filter element 300 is a solid annular structure, and a plurality of through annular filter holes (not shown) are provided on the upper and lower surfaces of the annular structure for filtering the second type of dust particles.

[0068] In some embodiments, the second filter element 300 is a ring-shaped cotton cloth structure, and the second end 202 of the first filter element 200 is roughly flush with the second filter element 300 on the side facing away from the dust suction port 102 in the airflow direction. The second filter element 300 is used to filter dust particles with a smaller diameter than the first filter element 200.

[0069] The second filter element 300 is made of cotton. When a small amount of liquid is sucked into the suction port 102, the cotton material can absorb the small amount of liquid, thereby preventing the liquid from being sucked into the dust removal device and damaging the internal structure. The cotton material used for the second filter element 300 is the preferred embodiment of this application. In other embodiments, the second filter element 300 can also be made of high-efficiency filter paper or other porous materials.

[0070] In one embodiment, the connection area between the first filter element 200 and the second filter element 300 has the same shape and size; wherein the diameter of the first type of dust particles used to be filtered by the first filter element 200 is larger than the diameter of the second type of dust particles used to be filtered by the second filter element 300.

[0071] Specifically, the second end 202 of the first filter element 200 and the side of the second filter element 300 close to the suction port 102 in the airflow direction are connection areas, both of which are annular in shape, and the sizes of the two are the same, so that the first filter element 200 and the second filter element 300 can be fitted and connected.

[0072] In some embodiments, the first filter element 200 is used to filter larger particles of garbage, such as debris and dust, to prevent them from entering the finer filter layers. The second filter element 300 is responsible for filtering smaller particles, fine dust, allergens, etc. to improve the cleanliness of the air and emissions. Its filtering performance makes the cleaning equipment more efficient when processing different types of garbage. Therefore, the filter assembly 10 is arranged in a two-layer filtering manner, which essentially increases the effective filtration area, thereby increasing the filtration effect and reducing the occurrence of reduced suction due to the filter surface being clogged by garbage. The first filter element 200 and the second filter element 300 filter particles with different diameters, which facilitates the dumping of garbage and the cleaning of the dust chamber 101b. This multi-layer filtering structure can capture garbage of different sizes and types in sequence, reduce filter blockage, improve overall filtration efficiency, and reduce maintenance frequency.

[0073] In one embodiment, please continue to refer to Figure 3 The filter assembly 10 further includes a mounting frame 400 , wherein the first filter element 200 and the second filter element 300 are both fixedly connected to the housing 100 via the mounting frame 400 .

[0074] Specifically, the mounting bracket 400 is installed in the first shell 110, and the first filter element 200, the second filter element 300 and the mounting bracket 400 are fixedly connected. The first filter element 200 is located upstream of the second filter element 300 in the flow direction of the airflow, and the mounting bracket 400 is connected to the mounting component on the dust removal equipment and is located at one end away from the dust suction port 102, and is used to cover the second filter element 300 and fix the first filter element 200.

[0075] In some embodiments, a accommodating cavity is provided in the mounting frame 400 for covering the second filter element 300, and the second end 202 of the first filter element 200 and the mounting frame 400 are connected to each other on the side close to the dust suction port 102 in the airflow direction, and the first filter element 200 and the second filter element 300 are respectively arranged around the mounting components on the dust removal equipment to separate the cavity 101 into a mounting cavity 101a and a dust cavity 101b.

[0076] The first filter element 200 utilizes a conical annular side surface, which increases the effective area of ​​the first filter element 200 and the second filter element 300, namely, the effective area of ​​the filter pores. Because the housing 100 in this embodiment is slender and approximately the size of a pen, the cross-sectional space of the cavity 101 is relatively small, so the use of an inclined surface effectively increases the filtration area. Furthermore, if the second filter element 300 is a flat filter element, the inclined surface of the first filter element 200 can ensure the filtration efficiency of the second filter element 300 while optimizing space. If both the first filter element 200 and the second filter element 300 are flat, and the distance between them is small, the filtering surface of the second filter element 300 may not fully contact the filtered airflow. Instead, the filtering effect can only be achieved where the projections of the filter pores of the second filter element 300 and the first filter element 200 overlap, thus weakening the filtration efficiency. Furthermore, the inclined surface of the first filter element 200 makes better use of space and simplifies assembly.

[0077] In some embodiments, to optimize the space within the dust chamber 101b and reduce airflow resistance, the angle between the first filter element 200 and the axis of the first housing 110 can be 46°. In other embodiments, the angle between the first filter element 200 and the axis of the first housing 110 can also be 30°, 50°, 68°, or other angles, with a preferred angle range of 25° to 75°. Furthermore, in some embodiments, the first filter element 200 can have an irregular spherical structure to increase the surface area, which is not specifically limited in this application.

[0078] The technical effects of the above scheme are: on the one hand, the first filter element and the second filter element are stored in the cavity through a hand-held mini shell, which greatly reduces the physical volume of the dust removal equipment, making the equipment easy to carry and suitable for cleaning needs in various occasions, thereby improving the portability and operability of the dust removal equipment; on the other hand, in a way different from the existing technology, this scheme realizes effective filtration of various types of dust particles through a reasonable structural design of the filter component. This design not only improves the filtration efficiency and service life of the dust removal equipment, but also optimizes the cleaning effect. It is suitable for a variety of cleaning scenarios, thereby enabling powerful cleaning.

[0079] Those skilled in the art will understand that Figures 1 to 4 The filter assembly for the dust removal equipment shown in the figure is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the dust removal equipment used therefor. The specific first filter element and the second filter element may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0080] In one embodiment, see Figure 5 and Figure 6 The dust removal device includes a mounting assembly 500, wherein the mounting assembly 500 is fixed in the mounting cavity 101a and communicates with the dust cavity 101b, and the mounting assembly 500 is used to fix the first filter element 200 and the second filter element 300. Specifically, the specific features of the mounting assembly 500 are as follows:

[0081] Encapsulating and securing: Mounting assembly 500 is designed to secure mounting bracket 400, thereby firmly securing first filter element 200 and second filter element 300. This assembly, with its appropriate shape and dimensions, prevents displacement of first and second filter elements 200, 300 during operation, providing excellent support and stability.

[0082] Connection with the dust chamber 101b: The direct connection between the mounting assembly 500 and the dust chamber 101b facilitates the collection of garbage within the device, allowing the device to quickly transfer the inhaled impurities into the dust chamber 101b during the cleaning process, effectively improving the overall cleaning efficiency.

[0083] Furthermore, in mounting assembly 500, an opening is provided on the side of the output shaft of the driving source of the driver, near dust chamber 101b. This opening allows the cleaning accessory to be easily connected to the output shaft of the driving source, forming an efficient power transmission channel. This connection allows the driving source to directly drive the cleaning accessory for effective cleaning, improving transmission efficiency and ensuring the flexibility and responsiveness of the cleaning action.

[0084] Therefore, through the above structure, mounting assembly 500 not only contributes to the stability of the device but also increases the efficiency of the coordinated operation between components. The direct connection between the drive source and the cleaning accessories avoids the power loss that may be caused by indirect transmission, thereby improving the cleaning ability and response speed of the device. This design reduces the overall complexity of the device, making subsequent maintenance and disassembly more convenient, and further enhancing the user experience.

[0085] Further, see Figure 6 and Figure 7 The mounting assembly 500 specifically includes: a first fixing portion 510, a second fixing portion 520 and a connecting portion 530, wherein the first filter element 200, the second filter element 300 and the mounting bracket 400 are respectively sleeved on the first fixing portion 510, the mounting bracket 400 is fixed on the second fixing portion 520, and the second fixing portion 520 is fixed in the cavity 101, and the two ends of the connecting portion 530 are respectively fixedly connected to the first fixing portion 510 and the second fixing portion 520, and the first fixing portion 510 and the dust chamber 101b are coaxially arranged.

[0086] In some embodiments, the first fixing portion 510 is a cylindrical ring structure, and the first filter element 200, the second filter element 300, and the mounting bracket 400 are respectively mounted on the first fixing portion 510, that is, the first fixing portion 510 passes through the first filter element 200, the second filter element 300, and the mounting bracket 400. The output shaft of the driving source extends out of the first fixing portion 510, and the second fixing portion 520 is fixed to the first housing 110 by snap-fitting. The connecting portion 530 is a plurality of flat plate structures extending perpendicular to the airflow direction and distributed in a circumferential array. The two ends of the connecting portion 530 are respectively connected to the first fixing portion 510 and the second fixing portion 520. The first fixing portion 510 and the dust chamber 101b are coaxially arranged. The connecting portion 530 not only allows the first fixing portion 510 to be mounted on the first housing 110, but also enables airflow.

[0087] In other embodiments, the second fixing portion 520 may be fixed to the first shell 110 by screwing, plugging, or other methods, and the second fixing portion 520 may also be fixed to the first shell 110 .

[0088] The technical effect of the above scheme is: by installing components, the component layout and functional integration in the dust removal equipment are optimized, the structural design of the filter component is more reasonable, the filtering efficiency and service life of the cleaning equipment are improved, and the cleaning effect can be optimized, which is suitable for a variety of cleaning scenarios.

[0089] In one embodiment, see Figure 8 and Figure 9 For the above-mentioned mounting frame 400, the mounting frame 400 includes a first mounting portion 410, a second mounting portion 420 and a mounting plate 430, wherein the first mounting portion 410 is a circular cylindrical structure, and the first filter element 200 and the second filter element 300 are both sleeved on the first mounting portion 410; the second mounting portion 420 is a circular cylindrical structure with a diameter larger than that of the first mounting portion 410, and the cylindrical surface of the second mounting portion 420 is fixedly connected to the second fixing portion 520 of the housing 100 and / or the mounting assembly 500; one end of the mounting plate 430 is connected to the first mounting portion 410, and the other end is connected to the second mounting portion 420 to fix the first mounting portion 410 and the second mounting portion 420.

[0090] Among them, the first mounting part 410 is sleeved on the first fixing part 510 of the mounting assembly 500, and the mounting plate 430 is a flat plate structure perpendicular to the airflow direction. In the direction perpendicular to the airflow, the two ends of the mounting plate 430 are respectively connected to the first mounting part 410 and the second mounting part 420, and the mounting plate 430 is arranged on the side of the mounting frame 400 away from the dust suction port 102; the first filter element 200 and the second filter element 300 are fixed in sequence on the side of the mounting frame 400 close to the dust suction port 102, and in the direction perpendicular to the airflow, the inner ring diameters of the first filter element 200 and the second filter element 300 are the same as the diameter of the first mounting part 410, and are both smaller than the diameter of the second mounting part 420, thereby further rationally utilizing the effective filtering area of ​​the first filter element 200 to increase the filtering effect.

[0091] In one embodiment, the first mounting portion 410 and the second mounting portion 420 together enclose a receiving cavity 401 of a circular cylindrical structure, wherein the shape and size of the receiving cavity 401 are the same as those of the second filter element 300, so as to accommodate at least part of the second filter element 300 in the receiving cavity 401.

[0092] Among them, the specific structure of the mounting frame 400 is not specifically limited in this application as long as it can realize the installation of the first filter element 200 and the second filter element 300 on the first shell 110 and / or the second fixing portion 520 of the mounting assembly 500.

[0093] Among them, the setting of the mounting plate 430 can not only realize the connection between the first mounting part 410 and the second mounting part 420, but also the mounting plate 430 can abut the second filter element 300 in the airflow direction, thereby realizing the limited fixation of the second filter element 300 in the airflow direction. In addition, the mounting plate 430 is arranged in a circumferentially spaced manner to achieve the aforementioned functions while allowing the filtered gas to flow out axially from the first shell 110.

[0094] Continue as Figure 8 and Figure 9 As shown, an annular groove 421 is provided on the outer side of the second mounting portion 420, and the portable dust removal device also includes a sealing ring (not shown in the figure). The annular groove 421 is used to accommodate the sealing ring, and a sealing ring (not shown in the figure) is also provided between the mounting assembly 500 and the mounting frame 400, thereby realizing the airway sealing of the annular middle and peripheral sides of the first filter element 200 and the second filter element 300, thereby avoiding the accumulation of dust between the gaps and the loss of wind force.

[0095] Continue as Figure 8As shown, the first filter element 200 also includes a reinforcement ring 220. The reinforcement ring 220 is arranged on the side of the first end 201 of the first filter element 200 away from the dust suction port 102 and the reinforcement ring 220 extends along the direction of the airflow. The setting of the reinforcement ring 220 can increase the strength of the first filter element 200 and reduce the deformation of the first filter element 200 caused by the impact of airflow and garbage, thereby improving the service life of the first filter element 200.

[0096] Continue as Figure 8 As shown, a handle portion 422 is provided on the side of the second mounting portion 420 facing away from the suction port 102 in the airflow direction. The handle portion 422 is a hook-shaped structure integrally formed with the second mounting portion 420. The handle portion 422 facilitates the user to remove the first filter element 200 and the second filter element 300 from the first housing 110 when the first housing 110 and the second housing 120 are disassembled, thereby improving the user experience. Specifically, the handle portion 422 is provided on the second mounting portion 420 to increase its volume and facilitate the user's grip. However, in other embodiments, the handle portion 422 may also be provided on the first mounting portion 410, which is not specifically limited here.

[0097] The technical benefit of this solution is that, through the rational structural design of the first and second filter elements and the mounting bracket of the filter assembly, it effectively filters a variety of waste types. This innovative design not only improves the filtration efficiency and service life of the cleaning equipment, but also optimizes the cleaning effect, making it suitable for a variety of cleaning scenarios.

[0098] In one embodiment, see Figure 2 The filter assembly 10 also includes a filter cotton 600 housed in the cavity 101 and located near one end of the air outlet 103; wherein, the filter cotton 600 is used to filter the airflow that has undergone double filtration for a third time, and the diameter of the dust particles filtered by the filter cotton 600 is smaller than that of the first filter element 200 and the second filter element 300.

[0099] In some embodiments, the filter 600 can ensure that the air discharged to the outside through the air outlet 103 is clean and harmless. Furthermore, its placement at the air outlet 103 can be used to shield the internal components of the dust removal device, thereby achieving the purpose of "hiding the ugly." The filter 600 is washable and reusable. In other embodiments, the filter 600 can also be made of other materials, which are not specifically limited in this application.

[0100] The design of the filter cotton 600 focuses on the following aspects:

[0101] Filtering tiny particles: The filter cotton 600 can capture fine particles in the air flow, such as dust, pollen, dirt and other pollutants, preventing harmful substances that have not been inhaled from being released into the air again.

[0102] Improved air quality: By filtering out harmful substances through the filter cotton 600, it helps to improve indoor air quality and reduce the concentration of allergens and respiratory irritants.

[0103] Protect the motor and internal components: The filter cotton 600 can prevent larger particles from entering the interior of the vacuum cleaner, thereby protecting the motor and other components from damage and extending the service life of the equipment.

[0104] Noise reduction: The filter cotton 600 can absorb noise to a certain extent, reduce the noise generated when the air is out, and improve the user experience.

[0105] In one embodiment, an antibacterial agent and / or a chemical adsorbent are added to the filter cotton 600; wherein the antibacterial agent is used to eliminate harmful bacteria in the airflow, and the chemical adsorbent is used to adsorb harmful gases in the airflow.

[0106] Specifically, adding antimicrobial agents and chemical adsorbents to the filter cotton 600 can achieve the following important functions:

[0107] Sterilization and disinfection: The antimicrobial agent in the filter cotton 600 can inhibit or kill the growth of microorganisms (such as bacteria, fungi and mold) in the airflow, thereby preventing these harmful microorganisms from being released into the air through the air outlet, protecting indoor air quality and reducing the risk of respiratory diseases.

[0108] Removal of harmful gases: The chemical adsorbent in the filter cotton 600 can specifically adsorb and remove some harmful gases (such as volatile organic compounds, ammonia, formaldehyde, etc.), helping to purify the exhaust air and reduce the potential harm of harmful gases to the human body, especially in confined spaces.

[0109] Improved filtering effect: Adding the above materials to filter cotton 600 can enhance the ability to capture tiny particles and gases, improve the overall air filtration efficiency, and make the dust removal equipment more effective when in use.

[0110] Prevents odors: The combination of antimicrobial agents and chemical adsorbents in the filter cotton 600 can also remove odors, keeping the exhaust air fresh and further improving the user experience.

[0111] Protect the equipment: By filtering pollutants and microorganisms in the air through the filter cotton 600, the internal components of the vacuum cleaner can be better protected and the service life of the equipment can be extended.

[0112] In another embodiment, please refer to Figure 2The filter assembly 10 also includes sound-absorbing cotton housed in the cavity 101 and located near one end of the air outlet 103; wherein the sound-absorbing cotton is used to reduce the noise of the airflow that has undergone double filtration to reduce the noise intensity when the airflow is discharged from the air outlet 103.

[0113] In some embodiments, the sound-absorbing cotton can ensure that the air discharged to the outside through the air outlet 103 is clean. Furthermore, the sound-absorbing cotton placed at the air outlet 103 can be used to conceal the internal components of the dust removal device, thereby achieving the purpose of "hiding the ugly." The sound-absorbing cotton can be washed and reused. In other embodiments, the sound-absorbing cotton can be made of other different materials, which are not specifically limited in this application.

[0114] Among them, the design focus of the sound-absorbing cotton is on the following aspects:

[0115] Noise suppression: Sound-absorbing cotton can effectively absorb sound waves, reduce the noise generated when the vacuum cleaner is working, thereby reducing the noise level emitted from the air outlet and improving the user experience.

[0116] Improve air quality: Sound-absorbing cotton usually has certain filtering properties, which can help improve the quality of exhausted air, capture some tiny particles, and help keep the indoor environment clean.

[0117] Reduce resonance: Sound-absorbing cotton can reduce the resonance generated when air flows in the pipe, thereby reducing the spread of noise and further reducing the overall noise when the equipment is running.

[0118] Improve the perceived quality of the device: By effectively reducing noise, the perceived quality of the vacuum cleaner can be enhanced, making users feel that the device is quieter and more comfortable, thereby improving the market competitiveness of the product.

[0119] Extend the life of the equipment: Although its main function is to reduce noise, the sound-absorbing cotton can also protect the internal components to a certain extent, avoiding wear and tear caused by vibration and noise, thereby extending the service life of the equipment.

[0120] Furthermore, the sound-absorbing cotton is mineral wool, or sound-absorbing material is added to the sound-absorbing cotton.

[0121] Among them, mineral wool is used as sound-absorbing cotton because it has good sound insulation effect and can absorb the noise generated by air flow. It is an effective material for reducing noise.

[0122] The sound absorbing material may include the following examples:

[0123] High-density foam materials: such as polyurethane foam, can effectively absorb sound waves, reduce the spread of noise, and reduce noise when air is discharged.

[0124] Glass fiber: has good acoustic properties, can absorb sound waves, reduce echoes and noise, and also has a certain filtering effect.

[0125] Special sound-absorbing materials: specially designed to reduce noise, can be used in filter cotton to enhance the noise reduction effect.

[0126] Composite materials: For example, combining different materials (such as foam and fiber) can provide both filtering and noise reduction effects, improving overall performance.

[0127] Coating materials: such as rubber or polymer coatings, can provide additional acoustic damping to the filter cotton and reduce noise.

[0128] The technical effect of the above solution is that setting filter cotton with added antibacterial agents and chemical adsorbents at the air outlet of the dust removal equipment can not only improve the air quality, but also help protect the equipment and improve the use environment.

[0129] The utility model also provides a portable dust removal device 20, see Figure 10 and Figure 11 The portable dust removal device 20 includes the above-mentioned filter component 10 for the dust removal device, as well as a cleaning accessory 910, a driving source 920, a power supply component 930 and an air pressure component 940. Among them, the cleaning accessory 910 is arranged in the cavity 101 and partially extends out of the dust suction port 102, and the cleaning accessory 910 cleans the surface to be cleaned by movement. The driving source 920 is arranged in the cavity 101, and the driving source 920 is used to drive the cleaning accessory 910 to move. The power supply component 930 is arranged in the cavity 101, and the power supply component 930 is used to filter solid waste from the air flow. The air pressure component 940 is arranged in the cavity 101, and the air pressure component 940 is used to provide air pressure so that external garbage can enter the cavity 101 through the dust suction port 102.

[0130] In some embodiments, as Figure 11 As shown, the portable dust removal device 20 of the present application realizes the miniaturization of the shell 100 and the orderly arrangement of the internal components through its unique structural design. For example, from the suction port 102 of the cavity 101 to the air outlet, the cleaning accessories 910, the driving source 920, the wind pressure component 940, the power supply component 930 and other components of the portable dust removal device 20 (for example, a touch panel, an air guide cover, etc.) that are customized in shape and size can be combined together in sequence to form a complete portable dust removal device 20. Among them, the cleaning accessories 910, the driving source 920, the wind pressure component 940 and the power supply component 930 are connected in series in the cavity 101 to form a compact and efficient cleaning system, so that powerful cleaning performance can be achieved without taking up too much space.

[0131] In some embodiments, each component in the portable dust removal device 20 is detachably connected to the housing 100 or other components, thereby making the assembly and subsequent disassembly of the components more convenient and more efficient.

[0132] In some embodiments, one end of the cleaning accessory 910 is an installation end, which is used to be installed on the output shaft of the driving source 920 to realize power transmission between the cleaning accessory 910 and the driving source 920; the other end is a cleaning end, which is used to clean the surface to be cleaned under the drive of the driving source 920.

[0133] Optionally, the surface to be cleaned can be a flat surface or a concave-convex surface, a hard surface or a soft surface, etc., and the user can also replace the corresponding cleaning accessory 910 for cleaning different types of surfaces to be cleaned, so as to effectively clean the surface to be cleaned. Therefore, the cleaning accessory 910 is exquisitely designed and can flexibly meet the cleaning needs of different surfaces and environments.

[0134] In one embodiment, in order to ensure the strength of the mounting end of the cleaning accessory 910 and prevent the excessively long mounting end and the output shaft from being deformed or damaged when subjected to force, the cleaning accessory 910 can be arranged in a manner that partially extends from the suction port 102 to the cavity 101. However, in other embodiments, the mounting end can also be arranged not to extend into the suction port 102, that is, the cleaning accessory 910 is arranged to extend entirely from the suction port 102. In this case, part of the output shaft extends from the suction port 102, and the mounting end and the output shaft are fixedly assembled.

[0135] In some embodiments, the drive source 920 is installed in the cavity 101 and is arranged behind the cleaning accessory 910. It is responsible for driving the movement of the cleaning accessory 910 to achieve the cleaning ability of the device. The drive source 920 is a detachable and replaceable drive motor. The type of drive motor includes a rotary motor, a vibration motor, or an ultrasonic generator.

[0136] For example, the driving source 920 may be a rotary motor that drives the cleaning accessory to rotate and clean the surface to be cleaned. The rotary motor can be used to clean oil stains or fingerprints on the surface. It can provide a smooth rotational force for the cleaning accessory 910, so that the cleaning accessory 910 effectively contacts the cleaning surface, thereby efficiently removing attached stains without damaging the surface.

[0137] For another example, the driving source 920 may be a vibration motor, which is used to drive the cleaning accessory by vibration, so that the cleaning accessory vibrates and cleans the surface to be cleaned. The vibration motor can be used to clean dust attached to the surface. The subtle vibration generated by the vibration motor can effectively loosen and shake off the dust attached to the surface, thereby enhancing the cleaning effect, especially when cleaning fabrics or uneven surfaces.

[0138] For some specific scenarios, such as deep cleaning of stubborn stains or fine particles, the driving source 920 can be an ultrasonic generator, so that the high-frequency sound waves generated by the ultrasonic generator can achieve a deep cleaning effect on the cleaning surface.

[0139] Among them, the use of multiple options of rotating motors, vibrating motors and ultrasonic generating devices enables the driving source 920 to provide the best solution under different cleaning needs, thereby meeting the cleaning requirements in home, industrial and special environments.

[0140] In some embodiments, the wind pressure component 940 is located in the cavity 101 and is arranged behind the power supply component 930. It is used to generate wind pressure in the cavity 101. Its function is to suck the garbage on the surface to be cleaned into the cavity 101 through the suction port. This function is effectively implemented in the mini space, enhancing the dust suction ability of the equipment.

[0141] Among them, the wind pressure component 940 may include a motor and a fan blade. The motor is fixedly installed on the shell 100 and accommodated in the cavity 101. The fan blade is mounted on the power shaft of the motor, so that the motor can drive the fan blade to rotate, thereby generating wind pressure in the cavity 101 and causing gas flow in the cavity 101, so that the garbage on the surface to be cleaned is sucked into the cavity 101 through the suction port 102.

[0142] In some embodiments, the power supply component 930 is arranged in the cavity in sequence and is located between the wind pressure component 940 and the driving source 920. Its function is to effectively filter the garbage entering the cavity 101 to ensure the cleaning effect, while preventing the garbage from flowing back into the environment, thereby improving the safety of user use.

[0143] Among them, the material of the power supply component 930 can be a microporous ceramic filter mesh for filtering larger particles of dust; and / or a metal mesh, which has low cost and good filtering effect; and / or a sponge filter layer to filter out larger substances in the air; and / or a HEPA filter layer to filter out particles with a smaller radius, and the filtering effect is better when used together.

[0144] In a specific implementation scenario, when the portable dust removal device 20 is working, the driving source 920 first drives the cleaning accessory 910 to move so that the cleaning accessory 910 sweeps off the garbage on the surface to be cleaned; then the wind pressure component 940 drives the fan blades to rotate, thereby generating wind pressure in the cavity 101 to suck the garbage on the surface to be cleaned into the cavity 101 through the suction port 102; finally, the power supply component 930 filters the air carrying garbage in the suction cavity 101 to discharge the filtered clean air from the air outlet.

[0145] As a specific embodiment, the portable dust removal device 20 at least includes a handheld dust removal pen for wireless handheld use and an automatic dust removal device for automatic opening and closing and dust collection.

[0146] The handheld dust removal pen features a wireless design, making it lightweight and portable, suitable for handheld use. Its ergonomic design allows for extended holding while cleaning, reducing fatigue. The pen is ideal for cleaning dust and dirt on desks, keyboards, windowsills, and other confined areas. Its wireless design allows users to move it freely, enhancing convenience and flexibility.

[0147] The automatic dust collector features an intelligent on / off function, autonomously cleaning a pre-set fixed area according to a preset operating mode. It can be remotely controlled by the user or automatically turned on or off based on environmental conditions, enhancing user convenience. Furthermore, the dust collector can connect to the user's other smart devices for remote control and scheduled cleaning.

[0148] Since the portable dust removal device 20 of the embodiment of the present application includes the aforementioned filter assembly 10 for dust removal devices, the portable dust removal device 20 of the embodiment of the present application has the beneficial effects of the aforementioned filter assembly 10, which will not be described in detail here. Furthermore, the embodiment of the present invention is provided with a cleaning accessory 910, which is disposed through the first fixing portion 510 of the mounting assembly 500. The first filter element 200 and the second filter element 300 are disposed in an annular manner around the first fixing portion 510, which better adapts to the structure of the cavity 101 and provides a better shielding effect.

[0149] The technical effect of the above solution is that the device not only avoids the bulkiness and inconvenience of traditional cleaning tools, but also provides a portable, flexible and efficient solution that meets the expectations of modern users for portable cleaning devices. Users can easily carry the device in every corner of their daily lives and clean at any time, improving their quality of life. Specifically, on the one hand, by differentiating from the existing technology, a handheld mini shell is used to store the cleaning accessories, drive source, wind pressure assembly and filter module in the cavity, which greatly reduces the physical volume of the dust removal device and realizes the miniaturization of the dust removal device, thereby improving the portability and operability of the dust removal device; on the other hand, this solution first uses the drive source to drive the cleaning accessories to clean the surface to be cleaned near the suction port, and then uses the wind pressure assembly to generate wind pressure in the cavity to suck the garbage on the surface to be cleaned into the cavity through the suction port, and finally uses the filter module in the cavity to filter the sucked garbage, thereby achieving the cleaning of dirt such as dust and garbage, effectively improving the cleanliness of dirt in dead corners and gaps, thereby achieving powerful cleaning.

[0150] The various technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. In addition, those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the invention applied for here. This application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not applied for in this application. The description and embodiments are merely exemplary, and the true scope and spirit of the present application are indicated by the claims.

[0151] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A filter assembly for dust removal equipment, characterized in that: include: The housing is a hand-held mini housing having a cavity inside and a suction port connected to the outside world at one end of the cavity; a first filter element, the first filter element being received in the cavity and located at one end close to the suction port; a second filter element, the second filter element being connected to the other end of the first filter element away from the dust suction port and being fixedly connected to the inner side of the housing; The first filter element and the second filter element are used for dual filtering of the airflow carrying dust particles sucked into the cavity, and the first filter element and the second filter element filter different types of dust particles.

2. The filter assembly for dust removal equipment according to claim 1, characterized in that: An air outlet communicating with the outside world is also provided at the other end of the cavity away from the dust suction port; The filter assembly further includes a filter cotton housed in the cavity and located near one end of the air outlet; wherein the filter cotton is used to perform a third filtration process on the airflow that has undergone double filtration, and the diameter of the dust particles filtered by the filter cotton is smaller than that of the first filter element and the second filter element; and / or The filter assembly also includes sound-absorbing cotton accommodated in the cavity and located near one end of the air outlet; wherein the sound-absorbing cotton is used to reduce the noise of the airflow that has undergone double filtration to reduce the noise intensity when the airflow is discharged from the air outlet.

3. The filter assembly for dust removal equipment according to claim 2, characterized in that: An antibacterial agent and / or a chemical adsorbent is added to the filter cotton, and the sound-absorbing cotton is mineral wool or a sound-absorbing material is added to the sound-absorbing cotton; The antibacterial agent is used to eliminate harmful bacteria in the airflow, and the chemical adsorbent is used to adsorb harmful gases in the airflow.

4. The filter assembly for dust removal equipment according to claim 1, characterized in that: The first filter element is a hollow truncated cone structure, and a plurality of intervally arranged waist-shaped filter holes are provided on the surface of the truncated cone structure for filtering the first type of dust particles.

5. The filter assembly for dust removal equipment according to claim 4, characterized in that: The second filter element is a solid annular structure, and a plurality of through annular filter holes are provided on the upper and lower surfaces of the annular structure for filtering the second type of dust particles.

6. The filter assembly for dust removal equipment according to claim 5, characterized in that: The shape and size of the connection area between the first filter element and the second filter element are the same; The diameter of the first type of dust particles filtered by the first filter element is greater than the diameter of the second type of dust particles filtered by the second filter element.

7. The filter assembly for dust removal equipment according to any one of claims 4 to 6, characterized in that: The filter assembly further includes a mounting frame, and the first filter element and the second filter element are both fixedly connected to the housing via the mounting frame.

8. The filter assembly for dust removal equipment according to claim 7, characterized in that: The mounting frame comprises: a first mounting portion, wherein the first mounting portion is a circular columnar structure, and the first filter element and the second filter element are both sleeved on the first mounting portion; a second mounting portion, the second mounting portion being a circular cylindrical structure having a diameter larger than that of the first mounting portion, and a cylindrical surface of the second mounting portion being fixedly connected to the housing; A mounting plate, one end of which is connected to the first mounting portion, and the other end of which is connected to the second mounting portion, so as to fixedly connect the first mounting portion and the second mounting portion.

9. The filter assembly for dust removal equipment according to claim 8, characterized in that: The first mounting portion and the second mounting portion together enclose a receiving cavity having a circular cylindrical structure; The shape and size of the accommodating cavity are the same as those of the second filter element, so as to accommodate at least a portion of the second filter element in the accommodating cavity.

10. A portable dust removal device, characterized in that: The portable dust removal device includes a filter assembly for a dust removal device as described in any one of claims 1 to 9, and the portable dust removal device is used to perform double filtering on the airflow carrying dust particles in the suction cavity.

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