Dust box and cleaning device

Abstract

The embodiment of the utility model provides a dust box and a cleaning device. The dust box comprises an air inlet channel, a first filter part, a cyclone separation cavity, an air outlet channel and a second filter part. An inlet of the air inlet channel communicates with the outside of the dust box. An inlet of the cyclone separation cavity is communicated with an outlet of the air inlet channel. The first filter part is arranged in the air inlet channel so that airflow entering the cyclone separation cavity can penetrate through the first filter part. The air outlet channel is communicated with the outlet of the cyclone separation cavity and the outside of the dust box. The second filter part is arranged in the air outlet channel, so that airflow discharged from the cyclone separation cavity passes through the second filter part and is discharged out of the dust box. The particle size of particles capable of being filtered by the first filter part is larger than that of particles capable of being filtered by the second filter part. According to the embodiment of the invention, the probability that the second filter part is blocked is reduced, the service life of the second filter part is prolonged, and the service life of the dust box and the cleaning device can be prolonged.

Description

Technical Field

[0001] The present application relates to the field of cleaning technology, and in particular to a dust box and a cleaning device. Background Art

[0002] In the prior art, a dust box is provided in a cleaning device such as a vacuum cleaner and a sweeping robot. The airflow sucked in by the cleaning device during the cleaning operation flows through the dust box, and the airflow is filtered in the dust box before being discharged from the cleaning device. Foreign matter such as dust and hair carried in the airflow remains in the dust box, thereby collecting foreign matter during the cleaning operation for the purpose of centralized cleaning.

[0003] The dust box is equipped with a filter element, which separates foreign matter by rotation through a cyclone separation assembly and then further removes dust through the filter element.

[0004] In the related art, since the filter element and the dust are located in the same cavity in the dust box, the filter element is prone to adhere to the filtered foreign matter, causing the filter element to be blocked, thereby shortening the service life of the filter element. Utility Model Content

[0005] In order to solve the above technical problems, the present application hopes to provide a dust box and a cleaning device, aiming to extend the service life of the filter element.

[0006] This application is implemented through the following technical solutions.

[0007] In a first aspect, the present application provides a dust box, comprising:

[0008] An air inlet channel, the inlet of which is connected to the outside of the dust box;

[0009] A cyclone separation chamber, wherein the inlet of the cyclone separation chamber is connected to the outlet of the air inlet passage;

[0010] a first filter element, disposed in the air inlet passage, so that the airflow entering the cyclone separation chamber passes through the first filter element;

[0011] An air outlet channel connecting the outlet of the cyclone separation chamber with the outside of the dust box;

[0012] a second filter element, disposed in the air outlet passage, so that the airflow discharged from the cyclone separation chamber passes through the second filter element and is discharged from the dust box;

[0013] The particle size of particles that can be filtered by the first filter element is greater than the particle size of particles that can be filtered by the second filter element.

[0014] In some embodiments, the dust box further comprises:

[0015] A shell assembly, comprising an installation space, a first opening and a second opening, wherein the first opening and the second opening both connect the installation space with the outside of the shell assembly;

[0016] A cyclone separation component is arranged in the installation space, the cyclone separation chamber is arranged in the cyclone separation component, an air inlet is provided on the surface of the cyclone separation component, the inlet of the cyclone separation chamber is connected with the air inlet, at least a part of the cyclone separation component is spaced from the inner wall of the installation space to form an air flow cavity, so that the air inlet is connected with the first opening and together form at least a part of the air inlet channel, the first filter element covers the air inlet, and the air outlet channel connects the outlet of the cyclone separation chamber and the second opening.

[0017] In some embodiments, the cyclone separation assembly is horizontally spaced from the inner wall of the installation space so that the airflow chamber surrounds the cyclone separation assembly. There are multiple air inlets, each of which is arranged in a surrounding manner and the surrounding axis extends in a vertical direction. The first filter element is an annular structure and covers each of the air inlets.

[0018] In some embodiments, the cyclone separation assembly includes a mounting member and a plurality of cyclone members, an air inlet cavity is provided in the mounting member, the air inlet cavity is at least partially open in the horizontal direction to form the air inlet, at least part of the cyclone member is located in the air inlet cavity, the cyclone separation cavity is provided in the cyclone member and its inlet is connected to the air inlet cavity, at least part of the cyclone members are arranged in a surrounding manner and the surrounding axis extends in the vertical direction.

[0019] In some embodiments, the cyclone separation chamber includes an air guide channel and a first cyclone chamber, the air guide channel connects the air inlet chamber and the first cyclone chamber, part of the inner wall of the air guide channel is tangentially connected to the inner wall of the first cyclone chamber to guide the airflow into the first cyclone chamber and then rotate, the first cyclone chamber extends in a vertical direction and is connected to the air outlet channel, and in a projection perpendicular to the vertical direction, the projection of the first cyclone chamber is circular.

[0020] In some embodiments, the cyclone separation chamber further includes a second cyclone chamber, which is located below the first cyclone chamber and the two are connected, and the second cyclone chamber is cone-shaped and contracts downward in a vertical direction.

[0021] In some embodiments, an exhaust column is provided on the top wall of the air inlet cavity, and a first exhaust channel is provided in the exhaust column and runs through the first cyclone cavity in a vertical direction. The top side of the first cyclone cavity is open, and the top wall cover of the air inlet cavity is provided at the open position of the top side of the first cyclone cavity so that the exhaust column can extend into the first cyclone cavity. The bottom of the first exhaust channel is connected to the first cyclone cavity, and the inlet of the first exhaust channel is lower than the bottom edge of the outlet of the air guide channel. The first exhaust channel forms a part of the air outlet channel.

[0022] In some embodiments, the cyclone separation assembly also includes a storage cylinder, a storage cavity extending vertically therein is provided in the storage cylinder, the storage cylinder is vertically arranged between the bottom wall of the installation space and the mounting member, the bottom wall of the air inlet cavity is provided with a mounting hole extending vertically therein, a portion of the cyclone member extends into the storage cavity through the mounting hole, and the bottom side of the cyclone separation cavity is open to communicate with the storage cavity.

[0023] In some embodiments, the shell assembly includes a side shell, a bottom cover and a seal. The bottom side of the side shell is at least partially open to form a bottom opening. The bottom cover can selectively open and close the bottom opening. When the bottom cover closes the bottom opening, the side shell and the bottom cover are arranged to form at least part of the installation space. The seal is clamped between the storage tube and the bottom cover and blocks the bottom opening of the storage cavity. When the bottom cover opens the bottom opening, the bottom opening of the storage cavity can be connected to the outside of the dust box.

[0024] In some embodiments, the first opening is provided on one side of the shell assembly along the horizontal direction, and a first wall of the first opening on one side of the horizontal direction extends in a direction close to the cyclone separation assembly and in a direction close to a second wall on the other side of the horizontal direction.

[0025] In some embodiments, the dust box also includes a first wind shield, which is connected to the side wall of the cyclone separation assembly along a horizontal direction. The first wind shield is provided with a guide surface, and the guide surface is arranged below the first filter element. The guide surface extends downward away from the cyclone separation assembly, and the shell assembly is spaced apart from the first wind shield.

[0026] In some embodiments, the dust box also includes a first wind shield, which is an annular structure. The cyclone separation assembly is vertically inserted into the inner side of the first wind shield and connected to the first wind shield. The first wind shield is provided with a guide surface, which is arranged below the first filter element and is annular. The guide surface extends downward away from the cyclone separation assembly, and the bottom wall of the installation space is spaced apart from the first wind shield in the vertical direction.

[0027] In some embodiments, the dust box also includes a second wind shield, which is arranged in the airflow cavity, extends in a vertical direction and is connected to at least one of the shell assembly and the cyclone separation assembly, and the top of the second wind shield is lower than the bottom of the first filter element.

[0028] In some embodiments, there are a plurality of the second wind shielding members, and the plurality of the second wind shielding members surround the cyclone separation assembly and are spaced apart from each other.

[0029] In some embodiments, the shell assembly includes a side shell and a bottom cover, the bottom side of the side shell is at least partially open to form a bottom opening, and the bottom cover can selectively open and close the bottom opening. When the bottom cover closes the bottom opening, the side shell, the bottom cover and the cyclone separation assembly are arranged to form at least part of the airflow cavity. When the bottom cover opens the bottom opening, the bottom side of the airflow cavity is open and can be connected to the outside of the dust box.

[0030] In some embodiments, the side shell is hinged to the bottom cover, the dust box further comprises a locking structure, the locking structure is provided with a first buckle that can be selectively moved, the locking structure is provided on one of the side shell and the bottom cover, one of the side shell and the bottom cover is provided with a second buckle, and the dust box comprises a locked state and an unlocked state;

[0031] In the locked state, the first buckle is locked with the second buckle, so that the bottom cover remains in a state of closing the bottom opening;

[0032] In the unlocked state, the first buckle is separated from the second buckle, so that the side shell can be rotated relative to the bottom cover until the bottom cover opens the bottom opening.

[0033] In some embodiments, the cyclone separation assembly is provided with a first exhaust channel, the inlet of the first exhaust channel is connected to the cyclone separation chamber and the outlet thereof is located on the surface of the cyclone separation assembly, the dust box also includes an exhaust assembly, at least part of the exhaust assembly is located in the installation space, the exhaust assembly is provided with a confluence space and a second exhaust channel, the second exhaust channel is connected to the second opening, the exhaust assembly is arranged on the surface of the cyclone separation assembly, the second filter element is located in the confluence space and has an annular structure to separate the confluence space into a first chamber and a second chamber, the outlet of the first exhaust channel is connected to the first chamber, the second chamber is connected to the second exhaust channel, the first exhaust channel, the confluence space and the second exhaust channel together form the air outlet channel.

[0034] In some embodiments, the dust box also includes a third filter element, which is located in the first cavity and has an annular structure to divide the first cavity into a first sub-cavity and a second sub-cavity. The outlet of the first exhaust channel is connected to the first sub-cavity. The particle size of the particles that can be filtered by the third filter element is larger than the particle size of the particles that can be filtered by the second filter element.

[0035] In some embodiments, there are multiple first exhaust channels, the first cavity is located on the inner side of the second filter element, the dust box also includes a confluence cover, the confluence cover is arranged in the first sub-cavity, a confluence hole is provided in the confluence cover, the confluence cover is arranged on the surface of the cyclone separation assembly so that the confluence hole connects the outlet of each of the first exhaust channels with the first sub-cavity, and the cross-sectional area of ​​the confluence hole perpendicular to the airflow direction gradually decreases along the airflow direction.

[0036] In some embodiments, the first filter element and the second filter element are both annular structures, the outlet of the confluence hole is circular, and the third filter element, the second filter element and the outlet of the confluence hole are coaxially arranged.

[0037] In some embodiments, the outlet of the first exhaust channel is located on the top surface of the cyclone separation assembly, the exhaust assembly includes a top cover and a conduit, the conduit is provided with the second exhaust channel and a mounting cavity penetrating in a vertical direction, the top cover is provided on the top side opening of the mounting cavity so that the top cover and the conduit are arranged to form the conduit space, the connecting position between the second exhaust channel and the mounting cavity is located on one side of the mounting cavity in the horizontal direction, the second filter element and the third filter element both extend in the vertical direction and are located between the top cover and the cyclone separation assembly.

[0038] In some embodiments, a portion of the top wall of the installation space is opened to form a disassembly and assembly port, which is connected to the installation cavity. The top cover can block the disassembly and assembly port and is detachably connected to the collector. The second filter element and the third filter element are both detachably connected to the top cover.

[0039] In some embodiments, the dust box also includes a third filter element, which is arranged in the air outlet channel and located upstream of the second filter element along the airflow direction. The particle size of particles that can be filtered by the third filter element is not smaller than the particle size of particles that can be filtered by the second filter element, and is smaller than the particle size of particles that can be filtered by the first filter element.

[0040] In some embodiments, the second filter element is capable of filtering particles with a diameter not less than 0.5 μm, and a filtration efficiency not less than 99.9%; and / or, the third filter element is capable of filtering particles with a diameter not less than 0.5 μm, and a filtration efficiency ranges from 95% to 99.9%.

[0041] In some embodiments, the first filter element is capable of filtering particles with a particle size of not less than 4 mm; and / or, the second filter element is capable of filtering particles with a particle size of not less than 0.5 μm, and the filtration efficiency is not less than 99.9%.

[0042] The dust box of the embodiment of the present application allows the airflow to pass through the first filter element, the cyclone separation chamber, and the second filter element in sequence, and the multiple filtrations are beneficial to improving the filtering effect. The first filter element and the cyclone separation chamber first filter out foreign matters with larger particle sizes, and then the second filter element filters out foreign matters with smaller particle sizes, which reduces the probability of the second filter element being blocked, is beneficial to extending the service life of the second filter element, and is more beneficial to improving the service life of the dust box.

[0043] In a second aspect, the present application provides a cleaning device, comprising a fan assembly and the dust box described in any embodiment of the present application, the fan assembly being provided with a suction channel and an impeller, the air outlet channel being connected to the suction channel, the impeller rotating in the suction channel to generate an airflow from the air outlet channel to the suction channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0045] Figure 1 A schematic diagram of a dust box from a first perspective provided in some embodiments of the present application;

[0046] Figure 2 An exploded schematic diagram of a dust box provided in some embodiments of the present application;

[0047] Figure 3 This is a schematic diagram of the structure of a mounting member in one embodiment of the present application;

[0048] Figure 4 for Figure 1 A schematic diagram of the dust box from a second viewing angle is shown;

[0049] Figure 5 for Figure 4 The dust box is shown in a cross-sectional view at position AA, wherein the dotted arrow indicates the direction of airflow movement;

[0050] Figure 6 for Figure 4 The dust box is shown in a cross-sectional view at position BB, wherein the dotted arrow indicates the direction of airflow movement;

[0051] Figure 7 for Figure 6 A partial enlarged schematic diagram of the C position in the middle;

[0052] Figure 8 for Figure 1 A schematic diagram of the dust box from a third viewing angle is shown;

[0053] Fig. 9 for Figure 8 The DD cross-sectional view of the dust box shown is in a closed state of the bottom cover, wherein the dotted arrow is the direction of airflow movement;

[0054] Fig.10 for Fig. 9 A partial enlarged view of position F of the dust box shown;

[0055] Fig.11 for Figure 7 A cross-sectional view of the dust box at position EE when the bottom cover is in an open state;

[0056] Fig.12 for Fig.11 A partial enlarged view of position G of the dust box shown.

[0057] Description of Reference Numerals

[0058] 10. dust box; 11. air inlet channel; 12. cyclone separation chamber; 13. first filter element; 14. air outlet channel; 15. second filter element; 16. housing assembly; 161. installation space; 1611. disassembly and assembly port; 162. first opening; 1621. first wall; 1622. second wall; 163. second opening; 164. side shell; 1641. bottom opening; 165. bottom cover; 166. sealing element; 17. cyclone separation assembly; 171. mounting element; 1711. air inlet chamber; 1712. mounting hole; 1721. air guide channel; 1722. first cyclone chamber; 1723. second cyclone chamber; 173. air inlet; 174. air Flow cavity; 175, exhaust column; 1751, first exhaust channel; 176, cyclone element; 177, storage cylinder; 1771, storage cavity; 18, first wind shield; 181, guide surface; 19, second wind shield; 20, exhaust assembly; 21, locking structure; 211, first buckle; 212, second buckle; 213, pressing plate; 214, return spring; 22, third filter element; 23, confluence cover; 231, confluence hole; 24, confluence space; 241, first cavity; 2411, first sub-cavity; 2412, second sub-cavity; 242, second cavity; 25, second exhaust channel; 26, top cover; 27, confluence element; 271, installation cavity. DETAILED DESCRIPTION

[0059] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0061] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0062] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0063] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0064] In the description of the embodiments of the present application, the directions or positional relationships indicated by the technical terms "vertical direction", "top", "bottom", etc. are based on the attached Figure 1 , Figure 4 and Fig. 9 The directions or positional relationships shown in the figure, and the directions or positional relationships indicated by technical terms such as "horizontal direction" are based on the attached Figure 4 and Fig. 9 The orientation or positional relationship shown is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0067] Below, this application is described in detail.

[0068] In the prior art, a dust box is provided in a cleaning device such as a vacuum cleaner or a sweeping robot. The airflow sucked by the cleaning device during the cleaning operation flows through the dust box, and the airflow is filtered in the dust box before being discharged from the cleaning device. Foreign matter such as dust and hair carried in the airflow is retained in the dust box, thereby collecting foreign matter during the cleaning operation for the purpose of centralized cleaning. A filter element is provided in the dust box, and foreign matter is separated by rotation through a cyclone separation assembly, and then further dusted through the filter element. In the related art, since the filter element and the dust are located in the same cavity in the dust box, the filter element is easily adhered to the filtered foreign matter, causing the filter element to be blocked, which shortens the service life of the filter element.

[0069] A first aspect of an embodiment of the present application provides a dust box, comprising an air inlet channel, a first filter, a cyclone separation chamber, an air outlet channel, and a second filter. The inlet of the air inlet channel is connected to the outside of the dust box. The inlet of the cyclone separation chamber is connected to the outlet of the air inlet channel. The first filter is arranged in the air inlet channel so that the airflow entering the cyclone separation chamber passes through the first filter. The air outlet channel connects the outlet of the cyclone separation chamber with the outside of the dust box. The second filter is arranged in the air outlet channel so that the airflow discharged from the cyclone separation chamber passes through the second filter and is discharged from the dust box. The particle size of the particles that can be filtered by the first filter is larger than the particle size of the particles that can be filtered by the second filter.

[0070] The dust box of the embodiment of the present application passes the inhaled airflow through the air inlet channel, the cyclone separation chamber and the air outlet channel in sequence. The first filter element and the second filter element are respectively arranged in the air inlet channel and the air outlet channel, so that the airflow passes through the first filter element, the cyclone separation chamber and the second filter element in sequence, and the filtering effect is improved through multiple filtering. The first filter element and the cyclone separation chamber first filter out foreign matter with larger particle sizes, and then the second filter element filters out foreign matter with smaller particle sizes, which reduces the probability of the second filter element being blocked, is conducive to extending the service life of the second filter element, and is more conducive to improving the service life of the dust box.

[0071] The second aspect of the embodiments of the present application provides a cleaning device, including a fan assembly and a dust box of any embodiment of the present application, the fan assembly is provided with a suction channel and an impeller, the air outlet channel is connected to the suction channel, and the impeller can rotate in the suction channel to generate an airflow from the air outlet channel to the suction channel.

[0072] The cleaning device can be a tool for cleaning or purifying air. For example, the cleaning device includes but is not limited to a vacuum cleaner, a mite removal device, a washing device, etc.

[0073] The fan assembly refers to a device for generating airflow or wind force, and is mainly composed of an air suction channel and an impeller. The air suction channel can be a channel in the fan assembly for airflow to pass through, and the impeller can be a component in the fan assembly for generating airflow or wind force, and is mainly composed of blades. The rotation of the impeller generates negative pressure, and the airflow carrying dust, foreign matter and other substances is sucked into the cleaning device.

[0074] Based on such a design concept, the cleaning device of the embodiment of the present application generates a flowing airflow through the impeller of the fan to promote multiple filtration of the airflow in the dust box, which is beneficial to improving the purification degree of the airflow and further beneficial to increasing the service life of the cleaning device.

[0075] See also Figure 1 , Figure 2 , Figure 6 and Fig. 9 The embodiment of the present application provides a dust box 10, including an air inlet channel 11, a first filter 13, a cyclone separation chamber 12, an air outlet channel 14 and a second filter 15. The inlet of the air inlet channel 11 is connected to the outside of the dust box 10. The inlet of the cyclone separation chamber 12 is connected to the outlet of the air inlet channel 11. The first filter 13 is arranged in the air inlet channel 11, so that the airflow entering the cyclone separation chamber 12 passes through the first filter 13. The air outlet channel 14 connects the outlet of the cyclone separation chamber 12 with the outside of the dust box 10. The second filter 15 is arranged in the air outlet channel 14, so that the airflow discharged from the cyclone separation chamber 12 passes through the second filter 15 and is discharged from the dust box 10. The particle size of the particles that can be filtered by the first filter 13 is larger than the particle size of the particles that can be filtered by the second filter 15.

[0076] The dust box 10 refers to a component that integrates the functions of filtering and containing, and is an important component of the cleaning device.

[0077] The air inlet channel 11 and the air outlet channel 14 refer to the channel through which the airflow first passes after entering the dust box 10 and the channel through which the airflow last passes before leaving the dust box 10, respectively. The airflow channel between the air inlet channel 11 and the air outlet channel 14 is a cyclone separation chamber 12.

[0078] The first filter element 13 and the second filter element 15 are both components for filtering gas. When the airflow flows through the first filter element 13 and the second filter element 15, the foreign matter carried in the airflow is blocked by the structures in the first filter element 13 and the second filter element 15 and stops moving with the airflow and is deposited, while the airflow passes through the first filter element 13 and the second filter element 15.

[0079] The cyclone separation chamber 12 refers to a chamber used to separate gas from solid. The working principle is that the airflow is introduced into the cyclone separation chamber 12 along the tangent direction of the cyclone separation chamber 12, so that the airflow rotates, so that the solid foreign matter with large inertial centrifugal force entrained in the airflow is thrown to the wall to separate from the airflow, and the solid foreign matter falls down through the action of gravity and is collected from one end of the cyclone separation chamber 12, and the airflow is discharged from the other end of the cyclone separation chamber 12.

[0080] Particle size refers to when a physical property or physical behavior of the measured particle is similar to that of a homogeneous sphere of a certain diameter, the diameter of the sphere is taken as the particle size of the measured particle. The particle is a solid particle.

[0081] The particle size of particles that can be filtered by the first filter element 13 is larger than the particle size of particles that can be filtered by the second filter element 15. That is to say, the first filter element 13 first filters the particles with larger particle sizes, while some of the particles with smaller particle sizes that cannot be filtered by the first filter element 13 are deposited and separated from the airflow after centrifugation through the cyclone separation chamber 12, and some are filtered through the second filter element 15.

[0082] In this way, solid particles with larger particle sizes carried by the airflow are difficult to flow to the second filter element 15 with the airflow, thereby reducing the probability of larger particle sizes being deposited on the surface of the second filter element 15 and causing the second filter element 15 to be blocked, which is beneficial to extending the service life of the second filter element 15.

[0083] The dust box 10 of the embodiment of the present application passes the inhaled airflow through the air inlet channel 11, the cyclone separation chamber 12 and the air outlet channel 14 in sequence. The first filter element 13 and the second filter element 15 are respectively arranged in the air inlet channel 11 and the air outlet channel 14, so that the airflow passes through the first filter element 13, the cyclone separation chamber and the second filter element 15 in sequence, and the filtering effect is improved through multiple filtering. The first filter element 13 and the cyclone separation chamber first filter out foreign matters with larger particle sizes, and then the second filter element 15 filters out foreign matters with smaller particle sizes, which reduces the probability of the second filter element 15 being blocked, is conducive to extending the service life of the second filter element 15, and is more conducive to improving the service life of the dust box 10.

[0084] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The dust box 10 further includes a shell assembly 16 and a cyclone separation assembly 17. The shell assembly 16 is provided with an installation space 161, a first opening 162 and a second opening 163, and the first opening 162 and the second opening 163 are both connected to the installation space 161 and the outside of the shell assembly 16. The cyclone separation assembly 17 is arranged in the installation space 161, and the cyclone separation chamber 12 is arranged in the cyclone separation assembly 17. An air inlet 173 is arranged on the surface of the cyclone separation assembly 17, and the inlet of the cyclone separation chamber 12 is connected to the air inlet 173. At least part of the cyclone separation assembly 17 is separated from the inner wall of the installation space 161 to form an air flow cavity 174, so that the air inlet 173 is connected to the first opening 162 and together form at least part of the air inlet channel 11. The first filter element 13 covers the air inlet 173, and the air outlet channel 14 is connected to the outlet of the cyclone separation chamber 12 and the second opening 163.

[0085] The installation space is the space inside the housing assembly 16, which is connected to the first opening 162 and the second opening 163 respectively. The housing assembly 16 can protect other components of the dust box 10 in the installation space 161, such as the cyclone separation assembly 17, and provide a space for arrangement. Among them, the first opening 162 is a hole for airflow to enter the installation space 161, and the second opening 163 is a hole for airflow to exit the installation space 161. The specific shapes of the first opening 162 and the second opening 163 are not limited, and can be circular or rectangular.

[0086] The cyclone separation assembly 17 is provided with a cyclone separation chamber 12 to separate part of the solid particles from the air flow.

[0087] The air inlet 173 is used to allow the airflow entering the installation space 161 to enter the cyclone separation chamber 12 .

[0088] See also Figure 3 The air inlet 173 may be an air inlet of the air inlet cavity 1711 , and is disposed in the horizontal direction of the mounting member 171 .

[0089] It should be noted that the specific shape of the air inlet 173 is not limited, and may be rectangular or circular, etc. In addition, the number of the air inlets is not limited, for example, 1, 2, 3, 4, etc., and may be one or more.

[0090] The airflow chamber 174 refers to a portion of the air inlet channel 11 formed between the cyclone separation assembly 17 and the shell of the dust box 10. The airflow enters the airflow chamber 174 from the first opening 162, and after being filtered by the first filter element 13 covering the air inlet 173, it enters the cyclone separation chamber 12. The shape of the outlet of the cyclone separation chamber 12 is also not limited, and can be rectangular or circular, etc. In addition, the number of outlets of the cyclone separation chamber 12 is not limited, for example, 1, 2, 3, 4, etc.

[0091] It can be understood that a portion of the surface of the first filter element 13 is located toward the airflow cavity 174 , so that the airflow in the airflow cavity 174 can flow smoothly from the first filter element 13 into the air inlet cavity.

[0092] In these embodiments, see Figure 7 By covering the air inlet 173 with the first filter element 13, the purpose of the airflow flowing through the first filter element 13 before entering the cyclone separation chamber 12 is achieved. The foreign matter blocked by the first filter element 13 filtering the airflow can be accumulated in the airflow chamber 174, which is convenient for the subsequent centralized processing of the foreign matter.

[0093] In some embodiments, see Figure 2The cyclone separation component 17 and the inner wall of the installation space 161 are arranged in a horizontal direction so that the airflow cavity 174 surrounds the cyclone separation component 17. There are multiple air inlets 173, and each air inlet 173 is arranged in a surrounding manner and the surrounding axis extends in a vertical direction. The first filter element 13 is an annular structure and covers each air inlet 173.

[0094] In these embodiments, it is beneficial to arrange more air inlets 173 in a limited space, which is beneficial to improve the air intake efficiency, and is beneficial to increase the air flow rate passing through the first filter element 13, thereby improving the filtration efficiency; the surrounding axis of each air inlet 173 extends in the vertical direction, which means that each air inlet 173 is located at the same horizontal height, so that each air inlet 173 is flush with the height of the first opening 162, which facilitates the airflow to enter the air inlet 173 without turning upward or downward, which is beneficial to reduce the resistance to the airflow flow and is beneficial to the stability of the airflow flow.

[0095] In some embodiments where the first filter element 13 is an annular structure, see Fig. 9 and Fig.10 The first filter element 13 is a conical structure, and the first filter element 13 gradually shrinks from top to bottom in the vertical direction, so that the filtered foreign matter accumulated on the surface of the first filter element 13 facing the airflow cavity 174 can be peeled off under the action of gravity, which is beneficial to extending the service life of the first filter element 13.

[0096] In some embodiments, see Figure 6 and Figure 7 The cyclone separation assembly 17 includes a mounting member 171 and a plurality of cyclone members 176. An air inlet cavity 1711 is provided in the mounting member 171. The air inlet cavity 1711 is at least partially open in the horizontal direction to form an air inlet 173. At least a portion of the cyclone member 176 is located in the air inlet cavity 1711. The cyclone separation cavity 12 is provided in the cyclone member 176 and its inlet is connected to the air inlet cavity 1711. At least a portion of the cyclone members 176 are arranged in a surrounding manner and the surrounding axis extends in the vertical direction.

[0097] The mounting member 171 is equivalent to the frame of the cyclone separation assembly 17, and also reserves a plurality of positions for mounting the cyclone member 176, and supports and fixes the cyclone member 176. A mounting hole 1712 is provided on the bottom plate of the mounting member 171, and the shape of the mounting hole 1712 is adapted to the cross-sectional shape of the cyclone member 176 along the horizontal direction. It should be noted that the number of mounting holes 1712 is not limited, and can be 1, 2, 3, etc., that is, it can be 1 or more.

[0098] The cyclone member 176 may be a thin-walled structural member to enclose and form the cyclone separation chamber 12 .

[0099] A plurality of air inlets 173 are disposed on the outer surface of the mounting member 171 along the horizontal direction. The shape of the air inlets 173 can be rectangular or circular.

[0100] The air inlet cavity 1711 is an internal cavity defined by the mounting member 171 and is communicated with the air inlet 173 .

[0101] Such an arrangement enables the entrance of at least part of the cyclone separation chamber 12 to correspond to the surrounding air inlet 173, which is beneficial for the airflow rotating in the airflow chamber 174 to enter the cyclone separation chamber 12, thereby improving the efficiency of cyclone separation of the airflow, and is also beneficial for shortening the length of the airflow flow path from the air inlet 173 to the entrance of the cyclone separation chamber 12, thereby improving the air intake efficiency.

[0102] For some examples, see Figure 6 A part of the cyclone elements 176 are arranged in a surrounding manner and the axis of the surrounding arrangement extends in the vertical direction, and another part of the cyclone elements 176 are located on the inner side of the cyclone elements 176 arranged in a surrounding manner, so as to improve the utilization rate of the space in the air inlet cavity 1711, so as to arrange more cyclone elements 176, so as to facilitate a larger flow of airflow for cyclone separation at the same time, so as to improve efficiency.

[0103] In some embodiments, see Fig. 9 The cyclone separation chamber 12 includes an air guide channel 1721 and a first cyclone chamber 1722. The air guide channel 1721 connects the air inlet chamber 1711 and the first cyclone chamber 1722. Part of the inner wall of the air guide channel 1721 is tangentially connected to the inner wall of the first cyclone chamber 1722 to guide the airflow into the first cyclone chamber 1722 and then rotate. The first cyclone chamber 1722 extends in the vertical direction and is connected to the air outlet channel 14. In the projection perpendicular to the vertical direction, the projection of the first cyclone chamber 1722 is circular.

[0104] The air guide channel 1721 refers to a channel for connecting the air inlet chamber 1711 and the first cyclone chamber 1722. The shape of the air guide channel 1721 is not limited, and can be a straight line or an arc shape, as long as it meets the requirement of being tangentially connected to the inner wall of the first cyclone chamber 1722.

[0105] The first cyclone chamber 1722 refers to a cavity for rotating and separating foreign matter in an airflow. In some embodiments, the first cyclone chamber 1722 is cylindrical in shape.

[0106] The air guiding channel 1721 is partially arc-shaped to adapt to the cylindrical shape of the first cyclone chamber 1722 and is tangentially connected to the first cyclone chamber 1722 so that the airflow can enter the first cyclone chamber 1722 more smoothly, thereby reducing wind resistance and noise.

[0107] The airflow enters the first cyclone chamber 1722 under the guidance of the air guide channel 1721 and rotates under the guidance of the inner wall of the first cyclone chamber 1722, so that foreign matter entrained in the airflow is separated from the airflow under the action of centrifugal force.

[0108] The vertical arrangement of the first cyclone chamber 1722 makes it easier to utilize gravity to settle foreign matter and separate it from the rotating airflow.

[0109] In some embodiments, the cyclone separation chamber 12 further includes a second cyclone chamber 1723, which is located below the first cyclone chamber 1722 and the two are connected. The second cyclone chamber 1723 is conical and shrinks downward in the vertical direction.

[0110] The second cyclone chamber 1723 refers to a partial cavity for rotating and separating foreign matter in the airflow, and is disposed at the bottom of the first cyclone chamber 1722 .

[0111] The second cyclone chamber 1723 is in a cone shape so that the dust-laden airflow can generate a cyclone or vortex in the cone. In the process of moving with the cyclone or vortex, the solid particles are separated from the airflow under the action of centrifugal force, and fall down through the inner wall of the cone. In the process of falling, as the second cyclone chamber 1723 contracts, the rotation speed of the airflow and the solid particles continues to increase, and the centrifugal force further increases. When the airflow reaches a certain position of the cone, a spiral motion from bottom to top is formed, which separates the airflow from the solid particles, thereby further improving the separation effect of the two. The inclined inner wall is also conducive to foreign matter rolling off the side wall of the second cyclone chamber 1723.

[0112] In some embodiments, see Figure 3 and Fig. 9 An exhaust column 175 is provided on the top wall of the air inlet cavity 1711, and a first exhaust channel 1751 is provided in the exhaust column 175 which penetrates in the vertical direction. The top side of the first cyclone cavity 1722 is open, and the top wall cover of the air inlet cavity 1711 is provided at the open position of the top side of the first cyclone cavity 1722 to allow the exhaust column 175 to extend into the first cyclone cavity 1722. The bottom of the first exhaust channel 1751 is connected to the first cyclone cavity 1722, and the inlet of the first exhaust channel 1751 is lower than the bottom edge of the outlet of the air guide channel 1721. The first exhaust channel 1751 forms a part of the air outlet channel 14.

[0113] The exhaust column 175 may be a columnar structure extending downward from the top wall of the air inlet cavity 1711 .

[0114] The first exhaust passage 1751 is an internal space defined by the exhaust column 175 , and a bottom of the first exhaust passage 1751 is communicated with the first cyclone chamber 1722 to exhaust the airflow in the first cyclone chamber 1722 .

[0115] In these embodiments, the airflow is discharged upward through the first exhaust channel 1751 and discharged from the first cyclone chamber 1722, while the foreign matter separated in the airflow is discharged downward from the first cyclone chamber 1722, and the probability of the two being mixed again is reduced by gravity, which is beneficial to improving the separation effect. The inlet of the first exhaust channel 1751 is lower than the bottom edge of the outlet of the air guide channel 1721, which can prevent the airflow from being discharged from the cyclone separation chamber 12 without undergoing rotational separation, thereby helping to improve the filtering effect of cyclone separation.

[0116] In some embodiments, see Fig. 9 and Fig.10 The cyclone separation assembly 17 also includes a storage cylinder 177, in which a storage chamber 1771 is vertically penetrated. The storage cylinder 177 is vertically arranged between the bottom wall of the installation space 161 and the mounting member 171. The bottom wall of the air inlet cavity 1711 is vertically penetrated by a mounting hole 1712. A portion of the cyclone member 176 extends into the storage chamber 1771 through the mounting hole 1712. The bottom side of the cyclone separation chamber 12 is open to communicate with the storage chamber 1771.

[0117] The storage cylinder 177 forms a portion of the inner wall of the airflow chamber 174 , while isolating the storage chamber 1771 from the airflow chamber 174 .

[0118] The storage chamber 1771 may be an inner space defined by the storage cylinder 177 for accommodating a portion of the cyclone member 176 .

[0119] The storage chamber 1771 in this embodiment is connected to the bottom opening of the cyclone separation chamber 12, which is conducive to centrally accommodating foreign matter separated by the cyclone element 176; it is also conducive to increasing the height of the cyclone separation chamber 12 in the vertical direction, further improving the cyclone separation effect.

[0120] The storage cylinder 177 and the mounting member 171 may be separate parts that are sealed and connected to each other; or they may be different parts of an integrally formed structural member.

[0121] It is understandable that the foreign matter accumulated in the storage chamber 1771 needs to be discharged regularly to reduce the probability of the foreign matter accumulating and entering the cyclone separation chamber 12 .

[0122] In some embodiments, see Fig. 9 and Fig.11The shell assembly 16 includes a side shell 164, a bottom cover 165 and a sealing member 166. The bottom side of the side shell 164 is at least partially open to form a bottom opening 1641. The bottom cover 165 can selectively open and close the bottom opening 1641. When the bottom cover 165 closes the bottom opening 1641, the side shell 164 and the bottom cover 165 surround at least a portion of the installation space 161. The sealing member 166 is sandwiched between the storage tube 177 and the bottom cover 165 and blocks the bottom opening of the storage cavity 1771. When the bottom cover 165 opens the bottom opening 1641, the bottom opening of the storage cavity 1771 can be connected to the outside of the dust box 10.

[0123] The side shell 164 refers to the side wall of the housing assembly 16 and surrounds the cyclone separation assembly 17. The bottom cover 165 refers to a cover structure for opening and closing the bottom opening 1641 of the side shell 164. The seal 166 refers to a sealing structure for blocking the bottom opening of the storage chamber 1771, which is at least partially located between the storage cylinder 177 and the bottom cover 165. The bottom opening 1641 is an opening on the bottom side of the housing assembly 16, and its shape is not limited, and can be circular or rectangular.

[0124] The side shell 164, the bottom cover 165 and the sealing member 166 cooperate to not only open and close the bottom opening 1641, but also seal the storage chamber 1771, so as to reduce the exchange of airflow between the storage chamber 1771 and the airflow chamber 174, resulting in the probability of foreign matter deposited in the storage chamber 1771 being lifted up again under the action of the airflow, and at the same time reduce the adverse effect on the separation and filtration effect of the airflow and solid particles in the cyclone separation chamber 12. Opening the bottom cover 165 is conducive to discharging foreign matter in the storage chamber 1771 at any time.

[0125] The specific material of the sealing member 166 is not limited, such as rubber.

[0126] In some embodiments, see Figure 6 The first opening 162 is provided on one side of the shell assembly 16 along the horizontal direction, and the first wall 1621 of the first opening 162 on one side of the horizontal direction extends in the direction close to the cyclone separation assembly 17 and in the direction of the second wall 1622 on the other side of the horizontal direction.

[0127] See also Figure 6 The first wall 1621 is one of the two sides of the first opening 162 along the horizontal direction, and the second wall 1622 is the other side of the two sides of the first opening 162 along the horizontal direction.

[0128] With such arrangement, the airflow entering the airflow cavity 174 from the first opening 162 will flow around the cyclone wind separation component 17, which is beneficial for the airflow to pass through the first filter element 13 from all directions and enter the air inlet cavity 1711. A larger surface area of ​​the first filter element 13 can be in contact with the airflow, which is more beneficial to improving the filtering effect and extending the service life.

[0129] In some embodiments, see Fig. 9 and Fig.10 The dust box 10 also includes a first wind shield 18, which is connected to the side wall of the cyclone separation assembly 17 along the horizontal direction. The first wind shield 18 is provided with a guide surface 181, and the guide surface 181 is arranged below the first filter element 13. The guide surface 181 extends downward in a direction away from the cyclone separation assembly 17, and the shell assembly 16 is spaced apart from the first wind shield 18.

[0130] The guide surface 181 refers to the side of the first wind shield 18 that faces the direction of the first filter 13. This surface guides the flow direction of the airflow. On the one hand, it guides the airflow that hits the guide surface 181 to flow to the first filter 13, thereby improving the filtering effect of the first filter 13. On the other hand, it blocks the airflow and reduces the probability of the airflow flowing to the part of the airflow cavity 174 located below the first filter 13. The first wind shield 18 can not only block the flow of airflow, but also prevent foreign matter at the bottom of the airflow cavity 174 from being picked up by the airflow and then covered on the first filter 13, which is beneficial to the continuous normal filtering work of the first filter 13. The service life of the first filter 13 is improved. In addition, the spacing between the housing assembly 16 and the first wind shield 18 is conducive to forming a space for foreign matter filtered out of the first filter 13 to fall to the bottom of the airflow cavity 174.

[0131] In some embodiments where the cyclone separation assembly 17 and the inner wall of the installation space 161 are arranged with spacing in the horizontal direction, the first wind shield 18 is an annular structure, the cyclone separation assembly 17 is vertically penetrated through the inner side of the first wind shield 18 and connected to the first wind shield 18, the first wind shield 18 is provided with a guide surface 181, the guide surface 181 is arranged below the first filter element 13 and is annular, the guide surface 181 extends downward away from the cyclone separation assembly 17, and the bottom wall of the installation space 161 and the first wind shield 18 are arranged with spacing in the vertical direction.

[0132] In this embodiment, the first wind shield 18 of the annular structure is designed to match the first filter element 13 of the annular structure. With this arrangement, the two can be better connected, the structural stability is enhanced, and the airflow can be better guided to flow to the first filter element 13 and to block the airflow from flowing to the bottom of the airflow cavity 174.

[0133] In some embodiments where a storage cylinder 177 is provided, the first wind shield 18 is made of rubber material, and a portion of the first wind shield 18 is sealingly clamped between the mounting member 171 and the storage cylinder 177 in the vertical direction, so that the first wind shield 18 can play a role in sealingly separating the storage chamber 1771 from the airflow chamber 174.

[0134] In some embodiments, see Fig. 9 and Fig.10 The dust box 10 also includes a second wind shield 19, which is disposed in the airflow cavity 174. The second wind shield 19 extends in a vertical direction and is connected to at least one of the shell assembly 16 and the cyclone separation assembly 17. The top of the second wind shield 19 is lower than the bottom of the first filter element 13.

[0135] The second wind shield 19 refers to a plate member disposed at the bottom of the airflow cavity 174 to block the movement of the airflow. The second wind shield 19 may be connected to at least one of the housing assembly 16 and the cyclone separation assembly 17 only.

[0136] The top of the second wind shield 19 is lower than the bottom of the first filter 13, so that the airflow can flow around the first filter 13 smoothly without being blocked by the second wind shield 19, which is beneficial to the first filter 13 filtering the airflow. In addition, the second wind shield 19 can also prevent the airflow at the bottom of the airflow cavity 174 from rotating, thereby reducing the probability of foreign matter being re-entrained and lifted by the airflow and covering the surface of the first filter 13, which is beneficial to the first filter 13 to continue to work efficiently and extend the service life of the first filter 13.

[0137] In some embodiments, see Figure 6 There are multiple second wind shielding members 19, and the multiple second wind shielding members 19 surround the cyclone separation assembly 17 and are spaced apart from each other.

[0138] With such arrangement, the plurality of second wind shielding members 19 can improve the airflow blocking capability, thereby preventing dust from being raised at the bottom of the airflow cavity 174 .

[0139] The number of the second wind shielding members 19 is not limited, and may be 2, 3, 4, etc.

[0140] In some embodiments provided with a side shell 164, a bottom cover 165 and a bottom opening 1641, when the bottom cover 165 closes the bottom opening 1641, the side shell 164, the bottom cover 165 and the cyclone separation assembly 17 surround and form at least a portion of the airflow chamber 174, and when the bottom cover 165 opens the bottom opening 1641, the bottom side of the airflow chamber 174 is open and can be connected to the outside of the dust box 10.

[0141] In this embodiment, foreign matter filtered by the first filter element 13 and rolled to the bottom of the airflow cavity 174 can be discharged from the airflow cavity 174 by opening the bottom cover 165 , which helps prevent excessive accumulation of foreign matter in the airflow cavity 174 .

[0142] In some embodiments, the bottom cover 165 can be used to simultaneously open and close the bottom opening 1641 and the bottom opening of the storage cavity 1771 to reduce the number of parts of the dust box 10 .

[0143] In some embodiments with side shell 164 and bottom cover 165, see Fig.11 and Fig.12 The side shell 164 is hinged with the bottom cover 165, and the dust box 10 further includes a locking structure 21, which is provided with a first buckle 211 that can be selectively moved, and the locking structure 21 is provided at one of the side shell 164 and the bottom cover 165, and one of the side shell 164 and the bottom cover 165 is provided with a second buckle 212, and the dust box 10 includes a locked state and an unlocked state. In the locked state, the first buckle 211 and the second buckle 212 are locked, so that the bottom cover 165 remains in a state of closing the bottom opening 1641. In the unlocked state, the first buckle 211 and the second buckle 212 are separated, so that the side shell 164 can rotate relative to the bottom cover 165 to a state where the bottom cover 165 opens the bottom opening 1641.

[0144] The locking structure 21 refers to a structure for keeping the dust box 10 closed and preventing foreign matter from spilling out. Optionally, in one case, the first buckle 211 is provided on the side shell 164, and the second buckle 212 is provided on the bottom cover 165; in another case, the first buckle 211 is provided on the bottom cover 165, and the second buckle 212 is provided on the side shell 164.

[0145] The locking structure 21 enables the dust box 10 of the embodiment of the present application to be opened and closed at any time. In the locked state, the locking structure 21 helps the bottom cover 165 to stably close the bottom opening 1641 of the side shell 164; in the unlocked state, the bottom cover 165 can be hinged and rotated with the bottom cover 165 through the hinge. In this way, the efficiency of cleaning foreign matter at the bottom of the installation space 161 is improved.

[0146] The specific form of the locking structure 21 is not limited, for example, see Fig.12 The locking structure 21 includes a pressing plate 213 and a return spring 214. The pressing plate 213 is rotatably connected to the side shell 164. The first buckle 211 is arranged on the pressing plate 213. The return spring 214 is arranged between the side shell 164 and the pressing plate. In a natural state, the return spring 214 uses its own elastic force to keep the first buckle 211 locked with the second buckle 212. After pressing the pressing plate 213, the return spring 214 is deformed to separate the first buckle 211 from the second buckle 212.

[0147] In some embodiments, see Figure 2 and Figure 4 The cyclone separation component 17 is provided with a first exhaust channel 1751, the inlet of the first exhaust channel 1751 is connected to the cyclone separation chamber 12 and the outlet thereof is located on the surface of the cyclone separation component 17, the dust box 10 also includes an exhaust component 20, at least part of the exhaust component 20 is located in the installation space 161, the exhaust component 20 is provided with a confluence space 24 and a second exhaust channel 25, the second exhaust channel 25 is connected to the second opening 163, the exhaust component 20 is arranged on the surface of the cyclone separation component 17, the second filter element 15 is located in the confluence space 24 and has an annular structure to divide the confluence space 24 into a first cavity 241 and a second cavity 242, the outlet of the first exhaust channel 1751 is connected to the first cavity 241, the second cavity 242 is connected to the second exhaust channel 25, the first exhaust channel 1751, the confluence space 24 and the second exhaust channel 25 together form an air outlet channel 14.

[0148] The exhaust assembly 20 defines a portion of the air outlet channel 14. The confluence space 24 can be a space for converging the airflow flowing out of the first exhaust channel 1751. Its shape is not limited, and can be cylindrical or square, etc. The specific shape is adapted to the shape of the cyclone separation assembly 17. In addition, the confluence space 24 is divided into a first cavity 241 and a second cavity 242 by the second filter element 15. The second cavity 242 surrounds the first cavity 241. The airflow from the first cavity 241 to the second cavity 242 needs to pass through the second filter element 15. The second exhaust channel 25 refers to the airflow channel connecting the second opening 163 and the second cavity 242 to discharge the converged airflow to the outside of the dust box 10.

[0149] The second filter element 15 having an annular structure is beneficial to increasing the contact area between the airflow and the second filter element 15 and improving the filtering effect.

[0150] In some embodiments, see Figure 5 , Fig. 9 and Fig.11 The dust box 10 also includes a third filter element 22, which is located in the first cavity 241 and has an annular structure to separate the first cavity 241 into a first sub-cavity 2411 and a second sub-cavity 2412. The outlet of the first exhaust channel 1751 is connected to the first sub-cavity 2411, and the particle size of the particles that can be filtered by the third filter element 22 is larger than the particle size of the particles that can be filtered.

[0151] See also Figure 5 The second filter element 15 and the third filter element 22 are nested with each other so that the airflow needs to pass through the third filter element 22 first and then through the second filter element 15. That is, the third filter element 22 is located on the upstream side of the second filter element 15 along the airflow direction.

[0152] The first cavity 241 includes a first sub-cavity 2411 and a second sub-cavity 2412. One of the first sub-cavity 2411 and the second sub-cavity 2412 is located inside the annular third filter element 22, and the other is located outside the annular third filter element 22. The airflow flows from the first exhaust channel 1751 to the first sub-cavity 2411, and enters the second sub-cavity 2412 after being filtered by the third filter element 22.

[0153] In this embodiment, the third filter element 22 reduces the probability of foreign matter with larger particle size blocking the second filter element 15, and further improves the filtering capacity of the dust box 10. The airflow first passes through the third filter element 22, and then passes through the second filter element 15. The particle size of the particles that can be filtered is gradually reduced from large to small, which is conducive to improving the purification capacity of the dust box 10 for the airflow.

[0154] It is understandable that the lengths of the airflow paths between the plurality of first exhaust channels 1751 and the second openings 163 are different, and the second openings 163 are connected to the air suction channel of the cleaning device so that negative pressure is formed in the first exhaust channels 1751. Therefore, the length of the airflow path between each first exhaust channel 1751 and the second openings 163 is inversely proportional to the negative pressure in each first exhaust channel 1751. In this way, the second filter element 15 and the third filter element 22, which are close to the first exhaust channel 1751 with a large negative pressure, are more likely to filter solid particles, while the parts close to the first exhaust channel 1751 with a small negative pressure are more difficult to filter solid particles, which easily causes uneven loss of service life in different areas of the second filter element 15 and the third filter element 22, thereby reducing the overall service life of the second filter element 15 and the third filter element 22.

[0155] In some embodiments, see Fig. 9 There are multiple first exhaust channels 1751, and the first cavity 241 is located on the inner side of the second filter element 15. The dust box 10 also includes a confluence cover 23, which is arranged in the first sub-cavity 2411. A confluence hole 231 is provided in the confluence cover 23. The confluence cover 23 is arranged on the surface of the cyclone separation assembly 17 so that the confluence hole 231 connects the outlet of each first exhaust channel 1751 with the first sub-cavity 2411, and the cross-sectional area of ​​the confluence hole 231 perpendicular to the airflow direction gradually decreases along the airflow direction.

[0156] The number of the first exhaust passages 1751 may be 2, 3, 4, 5, 6, etc.

[0157] The converging cover 23 refers to a cover for converging the airflow discharged from the first exhaust channel 1751. The cross section of the converging cover 23 perpendicular to the airflow direction is not limited, and the cross-sectional area gradually decreases along the airflow direction. The converging hole 231 is a space that runs through the converging cover 23 to connect the outlet of the first exhaust channel 1751 and the first sub-cavity 2411.

[0158] With such arrangement, the airflow is converged by the converging cover 23 after being discharged from the first exhaust channel 1751, which is beneficial to shortening the difference between the lengths of the airflow paths between each first exhaust channel 1751 and the second opening 163, thereby facilitating more uniform filtering of the airflow at each position of the second filter element 15 and the third filter element 22, thereby extending the service life of the second filter element 15 and the third filter element 22 and, at the same time, accelerating the velocity of the airflow and increasing the filtering rate.

[0159] In some embodiments, see Figure 5 The first filter element 13 and the second filter element 15 are both annular structures, the outlet of the confluence hole 231 is circular, and the third filter element 22, the second filter element 15 and the outlet of the confluence hole 231 are coaxially arranged.

[0160] In this way, the distances from each position of the edge of the outlet of the confluence hole 231 to the second filter element 15 and the third filter element 22 are roughly the same, which is more conducive to shortening the difference between the lengths of the airflow paths between each first exhaust channel 1751 and the second opening 163, thereby reducing the difference in airflow velocity in each direction through the second filter element 15 and the third filter element 22, which is conducive to extending the service life of the second filter element 15 and the third filter element 22.

[0161] In some embodiments, see Figure 3 , Figure 5 and Fig. 9 The outlet of the first exhaust channel 1751 is located on the top surface of the cyclone separation assembly 17. The exhaust assembly 20 includes a top cover 26 and a conduit 27. The conduit 27 is provided with a second exhaust channel 25 and a mounting cavity 271 extending vertically therethrough. The top cover 26 is arranged on the top side opening of the mounting cavity 271 so that the top cover 26 and the conduit 27 are arranged to form a conduit space 24. The connecting position between the second exhaust channel 25 and the mounting cavity 271 is located on one side of the mounting cavity 271 in the horizontal direction. The second filter element 15 and the third filter element 22 both extend in the vertical direction and are located between the top cover 26 and the cyclone separation assembly 17.

[0162] See also Figure 2 The installation cavity 271 refers to a cavity that runs through the confluence piece 27 in the vertical direction. The shape of the installation cavity 271 is not limited, and can be cylindrical or square. The top cover 26 and the confluence piece 27 are closed to form a confluence space 24. One side of the confluence space 24 is connected to the second exhaust channel 25 in the horizontal direction to discharge the filtered airflow through the second exhaust channel 25.

[0163] Understandably, see Figure 2 and Fig. 9 The top cover 26 and the second filter element 15 are jointly arranged to form a first cavity 241 .

[0164] After the airflow is discharged upward from the outlet of the first exhaust channel 1751, it is blocked by the top cover 26 and changes its flow direction, so that the airflow flows in a horizontal direction to pass through the third filter element 22 and the second filter element 15 in sequence into the second cavity 242, and then flows to the second exhaust channel 25 under the guidance of the conduit element 27, and finally discharged from the dust box 10 through the second opening 163.

[0165] In this way, the airflow can diffuse in the horizontal direction and then pass through the third filter element 22 and the second filter element 15, which is beneficial to increase the contact area between the two filters and the airflow, improve the filtering effect, and the diffused airflow is re-converged by the confluence piece 27 and discharged in a centralized manner, thereby improving the efficiency of the exhaust flow. In some embodiments, a portion of the top wall of the installation space 161 is opened to form a disassembly port 1611, and the disassembly port 1611 is communicated with the installation cavity 271. The top cover 26 can block the disassembly port 1611 and is detachably connected to the confluence piece 27. The second filter element 15 and the third filter element 22 are both detachably connected to the top cover 26.

[0166] In some embodiments, see Figure 2 and Figure 8 Part of the top wall of the installation space 161 is opened to form a disassembly port 1611, which is connected to the installation cavity 271. The top cover 26 can block the disassembly port 1611 and is detachably connected to the collector 27. The second filter element 15 and the third filter element 22 are both detachably connected to the top cover 26.

[0167] With such arrangement, the second filter element 15 and the third filter element 22 can be removed from the disassembly opening 1611 together with the top cover 26 , which facilitates the cleaning of foreign matter in the installation cavity 271 , and also facilitates the cleaning and replacement of the second filter element 15 and the third filter element 22 .

[0168] In some embodiments, the exhaust assembly 20 further includes a mounting ring, which is an annular structure. The mounting ring is disposed at the top of the cyclone separation assembly 17 and is spaced apart from the top cover 26 in the vertical direction. The mounting ring is located below the top cover 26 so that the second filter element 15 is clamped between the mounting ring and the top cover 26 in the vertical direction. The mounting ring is provided with a first mounting groove, and the top cover 26 is provided with a second mounting groove on one side of the surface facing the mounting ring. Both the first mounting groove and the second mounting groove are closed annular shapes, the top side of the first mounting groove is open, and the bottom side of the second mounting groove is open. The bottom end of the second filter element 15 is embedded in the first mounting groove, and the top end of the second filter element 15 is embedded in the second mounting groove. In this way, the second filter element 15 is fixed by the cooperation of the first mounting groove and the second mounting groove, thereby reducing the probability of the second filter element 15 being deformed under the blowing of the airflow.

[0169] In some embodiments, the third filter element 22 includes a frame and filter cotton, and the frame is provided with a plurality of installation holes penetrating along the flow direction of the airflow, and the filter cotton is filled in the installation holes. In this way, the outline of the third filter element is maintained by the frame, and the probability of deformation of the third filter element under the push of the airflow, which leads to a decrease in filtering performance, is reduced.

[0170] In some embodiments, the dust box 10 also includes a third filter element 22, which is disposed in the air outlet channel 14 and upstream of the second filter element 15 along the air flow direction. The particle size of particles that can be filtered by the third filter element 22 is not smaller than the particle size of particles that can be filtered by the second filter element 15, and is smaller than the particle size of particles that can be filtered by the first filter element 13.

[0171] In this way, the accumulation of particles with larger particle sizes on the second filter element 15 can be reduced, which is beneficial to extending the service life of the second filter element 15. At the same time, the particle sizes of the particles filtered by the dust box 10 are gradually reduced from large to small, which is beneficial to improving the dust box 10's ability to purify the airflow.

[0172] In some embodiments, the second filter element 15 is capable of filtering particles with a particle size of not less than 0.5 μm, and the filtering efficiency is not less than 99.9%.

[0173] That is, it is difficult for solid particles with a particle size of not less than 0.5 μm to pass through the second filter element 15 .

[0174] Filtration efficiency refers to the ratio of the amount of aerosol filtered out by the filter element to the amount of aerosol before filtration when the filter element is tested. The calculation formula for filtration efficiency E is as follows:

[0175] E=(1-(A2-A0) / R*A1)×100%

[0176] Where:

[0177] E—filtration efficiency of the tested filter;

[0178] A2—downstream aerosol particle concentration, in particles per square meter (particles / m 3 );

[0179] A0—Background concentration of downstream aerosol particles, in particles per cubic meter (particles / m 3 );

[0180] A1—Upstream aerosol particle concentration, in particles per cubic meter (particles / m 3 );

[0181] R—Correlation coefficient.

[0182] The correlation coefficient refers to the ratio of the particle concentrations of the upstream and downstream sampling systems when the test system is not equipped with the test filter and maintains a stable aerosol concentration.

[0183] In this way, the second filter element 15 can make the airflow discharged from the first opening 162 cleaner.

[0184] The filtration efficiency of the second filter element 15 may also be 99.9%, 99.95%, 99.99%, etc.

[0185] In some embodiments, the second filter element 15 is a HEPA (High Efficiency Particulate Air) filter, so that the second filter element 15 meets the filtering requirements of being able to filter particles with a particle size of not less than 0.5 μm and a filtering efficiency of not less than 99.9%.

[0186] In some embodiments, the filtering grade of the second filter element 15 is not lower than grade H12 in the EU EN779 standard.

[0187] In some embodiments, the third filter element 22 is used to filter particles with a particle size of not less than 0.5 μm, and the filtering efficiency ranges from 95% to 99.9%, so as to reduce the probability of particles with larger particle sizes contacting the second filter element 15 .

[0188] In some embodiments, the third filter element 22 is a sub-high efficiency filter that complies with the national standard GBT14295-2008. The main function of the sub-high efficiency filter is to filter large particles and dust in the air and effectively purify the indoor air. The sub-high efficiency filter includes primary filter cotton and sub-high efficiency filter cotton, wherein the primary filter cotton is used to capture large particles, and the sub-high efficiency filter cotton further filters fine particles.

[0189] In some embodiments, the filtering grade of the third filter element 22 is not lower than the H10 grade in the EU EN779 standard, and the filtering grade is lower than the filtering grade of the second filter element 15, so that the filtering capacity of the second filter element 15 can be effectively exerted.

[0190] In some embodiments, the first filter element 13 can filter particles with a particle size of not less than 4 mm. In other words, particles with a particle size equal to or greater than 4 mm are difficult to pass through the pores in the first filter element 13, so that the first filter element 13 can block particles with larger particle sizes in advance, reducing the probability that these particles affect the filtering effect of the subsequent second filter element 15.

[0191] In some embodiments, the first filter element 13 is a coarse filter that complies with the national standard GBT14295-2008.

[0192] In some embodiments, the first filter element 13 is a filter screen.

[0193] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A dust box, characterized in that: include: An air inlet channel, the inlet of which is connected to the outside of the dust box; A cyclone separation chamber, wherein the inlet of the cyclone separation chamber is connected to the outlet of the air inlet passage; a first filter element, disposed in the air inlet passage, so that the airflow entering the cyclone separation chamber passes through the first filter element; An air outlet channel connecting the outlet of the cyclone separation chamber with the outside of the dust box; a second filter element, disposed in the air outlet passage, so that the airflow discharged from the cyclone separation chamber passes through the second filter element and is discharged from the dust box; The particle size of particles that can be filtered by the first filter element is greater than the particle size of particles that can be filtered by the second filter element.

2. The dust box according to claim 1, characterized in that: The dust box also includes: A shell assembly, comprising an installation space, a first opening and a second opening, wherein the first opening and the second opening both connect the installation space with the outside of the shell assembly; A cyclone separation component is arranged in the installation space, the cyclone separation chamber is arranged in the cyclone separation component, an air inlet is provided on the surface of the cyclone separation component, the inlet of the cyclone separation chamber is connected with the air inlet, at least a part of the cyclone separation component is spaced from the inner wall of the installation space to form an air flow cavity, so that the air inlet is connected with the first opening and together form at least a part of the air inlet channel, the first filter element covers the air inlet, and the air outlet channel connects the outlet of the cyclone separation chamber and the second opening.

3. The dust box according to claim 2, characterized in that: The cyclone separation assembly and the inner wall of the installation space are arranged with spacing in the horizontal direction so that the airflow cavity surrounds the cyclone separation assembly. There are multiple air inlets, and each of the air inlets is arranged in a surrounding manner and the surrounding axis extends in the vertical direction. The first filter element is an annular structure and covers each of the air inlets.

4. The dust box according to claim 3, characterized in that: The cyclone separation assembly includes a mounting member and a plurality of cyclone members, wherein an air inlet cavity is provided in the mounting member, wherein the air inlet cavity is at least partially open in a horizontal direction to form the air inlet, and at least a portion of the cyclone members is located in the air inlet cavity, and the cyclone separation cavity is provided in the cyclone member and an inlet thereof is connected to the air inlet cavity, and at least a portion of the cyclone members are arranged in a surrounding manner and an axis around which the surrounding manner extends in a vertical direction.

5. The dust box according to claim 4, characterized in that: The cyclone separation chamber includes an air guide channel and a first cyclone chamber, the air guide channel connects the air inlet chamber and the first cyclone chamber, part of the inner wall of the air guide channel is tangentially connected to the inner wall of the first cyclone chamber to guide the airflow to enter the first cyclone chamber and then rotate, the first cyclone chamber extends in a vertical direction and is connected to the air outlet channel, and in a projection perpendicular to the vertical direction, the projection of the first cyclone chamber is circular.

6. The dust box according to claim 5, characterized in that: The cyclone separation chamber also includes a second cyclone chamber, which is located below the first cyclone chamber and is connected to the first cyclone chamber. The second cyclone chamber is cone-shaped and contracts downward in a vertical direction.

7. The dust box according to claim 5, characterized in that: An exhaust column is provided on the top wall of the air inlet cavity, and a first exhaust channel is provided in the exhaust column and runs through the first cyclone cavity in a vertical direction. The top side of the first cyclone cavity is open, and the top wall cover of the air inlet cavity is provided at the open position of the top side of the first cyclone cavity to allow the exhaust column to extend into the first cyclone cavity. The bottom of the first exhaust channel is connected to the first cyclone cavity, and the inlet of the first exhaust channel is lower than the bottom edge of the outlet of the air guide channel. The first exhaust channel forms a part of the air outlet channel.

8. The dust box according to claim 4, characterized in that: The cyclone separation assembly also includes a storage cylinder, in which a storage cavity is vertically penetrated. The storage cylinder is vertically arranged between the bottom wall of the installation space and the mounting member. The bottom wall of the air inlet cavity is provided with a mounting hole vertically penetrated. A portion of the cyclone member extends into the storage cavity through the mounting hole. The bottom side of the cyclone separation cavity is open to communicate with the storage cavity.

9. The dust box according to claim 8, characterized in that: The shell assembly includes a side shell, a bottom cover and a sealing member. The bottom side of the side shell is at least partially open to form a bottom opening. The bottom cover can selectively open and close the bottom opening. When the bottom cover closes the bottom opening, the side shell and the bottom cover are arranged to form at least a portion of the installation space. The sealing member is clamped between the storage tube and the bottom cover and blocks the bottom opening of the storage cavity. When the bottom cover opens the bottom opening, the bottom opening of the storage cavity can be connected to the outside of the dust box.

10. The dust box according to claim 3, characterized in that: The first opening is arranged on one side of the shell component along the horizontal direction, and the first wall of the first opening on one side of the horizontal direction extends in a direction close to the cyclone separation component and in a direction close to the second wall on the other side of the horizontal direction.

11. The dust box according to claim 2, characterized in that: The dust box also includes a first wind shield, which is connected to the side wall of the cyclone separation assembly along a horizontal direction. The first wind shield is provided with a guide surface, which is arranged below the first filter element. The guide surface extends downward away from the cyclone separation assembly, and the shell assembly is spaced apart from the first wind shield.

12. The dust box according to claim 3, characterized in that: The dust box also includes a first wind shield, which is an annular structure. The cyclone separation component is vertically inserted into the inner side of the first wind shield and connected to the first wind shield. The first wind shield is provided with a guide surface, which is arranged below the first filter element and is annular. The guide surface extends downward away from the cyclone separation component, and the bottom wall of the installation space is spaced apart from the first wind shield in the vertical direction.

13. The dust box according to claim 3, characterized in that: The dust box also includes a second wind shield, which is arranged in the airflow cavity, extends in a vertical direction and is connected to at least one of the shell assembly and the cyclone separation assembly, and the top of the second wind shield is lower than the bottom of the first filter element.

14. The dust box according to claim 13, characterized in that: There are a plurality of second wind shielding members, and the plurality of second wind shielding members surround the cyclone separation assembly and are spaced apart from each other.

15. The dust box according to claim 2, characterized in that: The shell assembly includes a side shell and a bottom cover, the bottom side of the side shell is at least partially open to form a bottom opening, and the bottom cover can selectively open and close the bottom opening. When the bottom cover closes the bottom opening, the side shell, the bottom cover and the cyclone separation assembly surround and form at least part of the airflow cavity. When the bottom cover opens the bottom opening, the bottom side of the airflow cavity is open and can be connected to the outside of the dust box.

16. The dust box according to claim 15, characterized in that: The side shell is hinged to the bottom cover, the dust box further comprises a locking structure, the locking structure is provided with a first buckle that can be selectively moved, the locking structure is provided on one of the side shell and the bottom cover, one of the side shell and the bottom cover is provided with a second buckle, and the dust box comprises a locked state and an unlocked state; In the locked state, the first buckle is locked with the second buckle, so that the bottom cover remains in a state of closing the bottom opening; In the unlocked state, the first buckle is separated from the second buckle, so that the side shell can be rotated relative to the bottom cover until the bottom cover opens the bottom opening.

17. The dust box according to claim 2, characterized in that: The cyclone separation component is provided with a first exhaust channel, the inlet of the first exhaust channel is connected to the cyclone separation chamber and the outlet thereof is located on the surface of the cyclone separation component, the dust box also includes an exhaust component, at least a portion of the exhaust component is located in the installation space, the exhaust component is provided with a confluence space and a second exhaust channel, the second exhaust channel is connected to the second opening, the exhaust component is arranged on the surface of the cyclone separation component, the second filter is located in the confluence space and has an annular structure to divide the confluence space into a first chamber and a second chamber, the outlet of the first exhaust channel is connected to the first chamber, the second chamber is connected to the second exhaust channel, the first exhaust channel, the confluence space and the second exhaust channel together form the air outlet channel.

18. The dust box according to claim 17, characterized in that: The dust box also includes a third filter element, which is located in the first cavity and has an annular structure to divide the first cavity into a first sub-cavity and a second sub-cavity. The outlet of the first exhaust channel is connected to the first sub-cavity. The particle size of particles that can be filtered by the third filter element is larger than the particle size of particles that can be filtered by the second filter element.

19. The dust box according to claim 18, characterized in that: There are multiple first exhaust channels, and the first cavity is located on the inner side of the second filter element. The dust box also includes a confluence cover, which is arranged in the first sub-cavity. A confluence hole is provided in the confluence cover. The confluence cover is arranged on the surface of the cyclone separation assembly to connect the confluence hole to the outlet of each of the first exhaust channels and the first sub-cavity. The cross-sectional area of ​​the confluence hole perpendicular to the airflow direction gradually decreases along the airflow direction.

20. The dust box according to claim 19, characterized in that: The first filter element and the second filter element are both annular structures, the outlet of the confluence hole is circular, and the third filter element, the second filter element and the outlet of the confluence hole are coaxially arranged.

21. The dust box according to claim 18, characterized in that: The outlet of the first exhaust channel is located on the top surface of the cyclone separation assembly, the exhaust assembly includes a top cover and a conduit, the conduit is provided with the second exhaust channel and a mounting cavity penetrating in a vertical direction, the top cover is covered on the top side opening of the mounting cavity so that the top cover and the conduit are arranged to form the conduit space, the connecting position between the second exhaust channel and the mounting cavity is located on one side of the mounting cavity in the horizontal direction, the second filter element and the third filter element both extend in the vertical direction and are located between the top cover and the cyclone separation assembly.

22. The dust box according to claim 21, characterized in that: A portion of the top wall of the installation space is opened to form a disassembly and assembly port, which is connected to the installation cavity. The top cover can block the disassembly and assembly port and is detachably connected to the collector. The second filter element and the third filter element are both detachably connected to the top cover.

23. The dust box according to claim 1, characterized in that: The dust box also includes a third filter element, which is arranged in the air outlet channel and located upstream of the second filter element along the airflow direction. The particle size of particles that can be filtered by the third filter element is not smaller than the particle size of particles that can be filtered by the second filter element, and is smaller than the particle size of particles that can be filtered by the first filter element.

24. The dust box according to claim 23, characterized in that: The second filter element can filter particles with a particle size of not less than 0.5 μm, and the filtration efficiency is not less than 99.9%; and / or the third filter element can filter particles with a particle size of not less than 0.5 μm, and the filtration efficiency ranges from 95% to 99.9%.

25. The dust box according to claim 1, characterized in that: The first filter element can filter particles with a particle size of not less than 4 mm; and / or the second filter element can filter particles with a particle size of not less than 0.5 μm, and the filtration efficiency is not less than 99.9%.

26. A cleaning device, characterized in that: The cleaning device includes a fan assembly and a dust box according to any one of claims 1 to 25, the fan assembly is provided with a suction channel and an impeller, the air outlet channel is connected to the suction channel, and the impeller rotates in the suction channel to generate an airflow from the air outlet channel to the suction channel.

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