Vacuum cleaner with multi-stage cyclones and method

Abstract

The invention discloses a dust collector with multistage cyclones and a method. The dust collector comprises a shell, a dust removal device detachably matched with the shell, and a vacuum generation device located in the shell and located on the downstream of the dust removal device. Wherein the dust removal device comprises a cup body which can generate primary cyclone and is provided with a cup body cavity, a filter screen cover which is detachably positioned in the cup body cavity, and a multi-stage cyclone which is positioned in the filter screen cover and is positioned at the downstream of the filter screen cover; the multi-stage cyclone comprises a cyclone main body and a cyclone cover, wherein the cyclone main body is provided with a plurality of cyclone units and has a central axis direction, and the cyclone cover is detachably mounted on the cyclone main body and is provided with a plurality of cyclone unit air inlets and a plurality of cyclone unit air outlet pipes; and the cyclone cover further comprises a plurality of guide pieces which are arranged adjacent to the air inlets of the corresponding cyclone units. According to the multi-stage cyclone separator, flow guiding is conducted on each air inlet of the multi-stage cyclone separator correspondingly, wind resistance is reduced, the secondary cyclone separation performance is improved, and meanwhile airflow noise is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of vacuum cleaners, and in particular relates to a vacuum cleaner with a multi-stage cyclone and a method. Background Art

[0002] A vacuum cleaner usually includes a cylindrical dust cup that can generate a primary cyclone, a filter screen located in the cylindrical dust cup, a multi-stage cyclone located downstream of the filter screen and generating a secondary cyclone or a tertiary cyclone, and a motor located downstream of the multi-stage cyclone. In order to improve the separation efficiency of the multi-stage cyclone, the multi-stage cyclone uses multiple truncated cones for secondary cyclone separation. However, the multiple air inlets of the existing multi-stage cyclone are not effectively guided, which easily causes airflow turbulence and increases wind resistance. At the same time, it also reduces cyclone separation performance and generates airflow noise. This type of technology can refer to Chinese invention patent CN102525348A. Therefore, a vacuum cleaner with a multi-stage cyclone is needed to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a vacuum cleaner with a multi-stage cyclone and a method, by guiding each air inlet of the multi-stage cyclone accordingly, reducing wind resistance, improving secondary cyclone separation performance, and reducing airflow noise.

[0004] The first technical solution of the present invention is: a vacuum cleaner with a multi-stage cyclone, which includes a shell, a dust removal device detachably matched with the shell, and a vacuum generating device located in the shell and downstream of the dust removal device, wherein the dust removal device includes a cup body that can generate a first-stage cyclone and has a cup body cavity, a filter screen cover detachably located in the cup body cavity, and a multi-stage cyclone located in the filter screen cover and downstream thereof; wherein the multi-stage cyclone includes a cyclone main body with multiple cyclone units and a central axis direction, and a cyclone cover detachably mounted on the cyclone main body and having multiple cyclone unit air inlets and multiple cyclone unit air outlet pipes; wherein the cyclone cover also includes multiple guide members arranged adjacent to the corresponding cyclone unit air inlets.

[0005] On the basis of the above technical solution, the following subsidiary technical solutions are further included:

[0006] The plane where the air inlet of the cyclone unit is located is at least partially parallel to the direction of the central axis to ensure the air intake direction.

[0007] The guide member has a first end and a second end, wherein the cyclone unit air inlet has a first air inlet edge and a second air inlet edge in the axial direction, wherein the second end of the guide member is located on the outside of the second air inlet edge to guide the airflow to enter the multi-stage cyclone in an orderly manner to avoid airflow turbulence.

[0008] The guide member is at least partially in a straight line or an arc shape, wherein the first end of the guide member is away from the second edge of the air inlet, and the second end of the guide member is close to the second edge of the air inlet, so as to form an orderly guidance of the airflow.

[0009] The outer side of the guide piece abuts against the inner wall of the filter screen cover to reduce leakage of air flow.

[0010] The second technical solution of the present invention is: a multi-stage cyclone, which includes a cyclone main body having multiple cyclone units and having a central axis direction, and a cyclone cover that is detachably mounted on the cyclone main body and has multiple cyclone unit air inlets and multiple cyclone unit air outlet pipes; wherein the cyclone cover also includes multiple guide members that are arranged adjacent to the corresponding cyclone unit air inlets and guide the airflow into the corresponding cyclone unit air inlets.

[0011] It includes a channel bottom wall that limits the inner side of the corresponding cyclone unit air inlet, a circumferential partition plate located at the end of the corresponding air inlet channel wall, an outer channel wall located outside the channel bottom wall, and a plurality of guide member grooves located on the outer channel wall and at least partially accommodating one end of the guide member to guide the airflow.

[0012] It includes an air outlet cover plate located at one end of the cyclone cover and connected to a plurality of cyclone unit air outlet pipes, wherein the air outlet cover plate is provided with a plurality of cyclone air outlet pipes; wherein each cyclone air outlet pipe is interconnected with the corresponding cyclone unit air outlet pipe; and the central axis of the cyclone unit air outlet pipe is located outside the central axis of the corresponding cyclone air outlet pipe, and the central axis of the cyclone air outlet pipe is obliquely intersected with the central axis of the cyclone unit air outlet pipe to simplify the airflow path.

[0013] The third technical solution of the present invention is: a method comprising the following steps:

[0014] S1: Provide a multi-stage cyclone; wherein the multi-stage cyclone comprises a cyclone body having a plurality of cyclone units and having a central axis direction, and a cyclone cover detachably mounted on the cyclone body and having a plurality of cyclone unit air inlets and a plurality of cyclone unit air outlet pipes; wherein the cyclone cover further comprises a plurality of guide members arranged adjacent to the corresponding cyclone unit air inlets;

[0015] S2: The fine dust-containing airflow first enters the multi-stage cyclone along the central axis direction, and then enters the air inlet of the corresponding cyclone unit along the guiding direction of the guide member;

[0016] S3: the fine dust-containing airflow continues to perform secondary cyclone separation in the corresponding multiple cyclone units along the tangential direction of the air inlet of the cyclone unit;

[0017] S4: The separated airflow then flows out of the cyclone body through the cyclone unit outlet pipe until it ends.

[0018] The fourth technical solution of the present invention is: a method comprising the following steps:

[0019] S100: A vacuum cleaner is provided, comprising a shell, a dust removal device detachably matched with the shell, and a vacuum generating device located in the shell and downstream of the dust removal device, wherein the dust removal device comprises a cup body capable of generating a primary cyclone and having a cup body cavity, a filter screen cover detachably located in the cup body cavity, and a multi-stage cyclone located in the filter screen cover and downstream thereof; wherein the multi-stage cyclone comprises a cyclone body having a plurality of cyclone units and having a central axis direction, and a cyclone cover detachably mounted on the cyclone body and having a plurality of cyclone unit air inlets and a plurality of cyclone unit air outlet pipes; wherein the cyclone cover further comprises a plurality of guide members arranged adjacent to the corresponding cyclone unit air inlets;

[0020] S200: The dust-laden airflow enters the cup cavity of the cup body tangentially along the central axis direction, and performs primary cyclone separation to separate large dust particles;

[0021] S300: The airflow after primary cyclone separation is further filtered by the filter screen, while dust with a diameter larger than the mesh diameter is blocked by the mesh;

[0022] S400: the airflow containing fine dust enters the multi-stage cyclone along the central axis direction, and then enters the air inlet of the corresponding cyclone unit along the guiding direction of the guide member;

[0023] S500: the fine dust-containing airflow continues along the tangential direction of the air inlet of the cyclone unit, and then performs secondary cyclone separation in the corresponding multiple cyclone units to separate the fine dust;

[0024] S600: The separated airflow then flows out of the cyclone body through the cyclone unit outlet pipe until it ends.

[0025] The advantages of the present invention are as follows: by guiding the airflow accordingly at each air inlet of the multi-stage cyclone, the airflow is guided in an orderly manner, the wind resistance is reduced, the secondary cyclone separation performance is improved, and at the same time, the airflows are prevented from colliding with each other, thereby reducing the airflow noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a perspective view of a first embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of a first embodiment of the present invention;

[0029] Figure 3 is an exploded view of a first embodiment of the present invention;

[0030] Figure 4 An exploded view of a dust removal device in a first embodiment of the present invention;

[0031] Figure 5 A three-dimensional view of the filter screen cover in a second embodiment of the present invention at a certain viewing angle;

[0032] Figure 6 A cross-sectional view of a filter screen cover and a multi-stage cyclone in a second embodiment of the present invention at a certain viewing angle;

[0033] Figure 7 A partial cross-sectional view of the filter screen cover and the multi-stage cyclone in the second embodiment of the present invention from another perspective;

[0034] Figure 8 A three-dimensional diagram of the filter screen cover in the second embodiment of the present invention from another viewing angle;

[0035] Fig. 9 is a three-dimensional diagram of the filter screen cover in the second embodiment of the present invention from another viewing angle;

[0036] Fig.10 A partial three-dimensional diagram of a multi-stage cyclone in a second embodiment of the present invention;

[0037] Fig.11 is a three-dimensional diagram of a cyclone body in a second embodiment of the present invention;

[0038] Fig.12 is a three-dimensional view of a cyclone cover in a second embodiment of the present invention at a certain viewing angle;

[0039] Fig.13 is a three-dimensional view of the cyclone cover in the second embodiment of the present invention from another viewing angle;

[0040] Fig.14 It is a three-dimensional view of the air outlet cover plate in the second embodiment of the present invention at a certain viewing angle. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “up”, “down”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Example: Refer to Figure 1-4 As shown, the present invention discloses a first embodiment of a vacuum cleaner with a multi-stage cyclone, which includes a shell 1000, a dust removal device 2000 detachably matched with the shell 1000, a vacuum generating device 3000 located in the shell 1000 and downstream of the dust removal device 2000, and a power supply device 4000 for providing power to the vacuum generating device 3000.

[0046] The housing 1000 includes a motor housing for accommodating the vacuum generating device 3000, a supporting housing for supporting the dust removing device 2000, a handle housing at one end of the motor housing, and a power supply housing for fixing the power supply device 4000. The bottom of the power supply device 4000 can be placed on a horizontal plane.

[0047] The vacuum generating device 3000 is preferably a brushless DC motor, but may also be a brushed DC motor.

[0048] The power supply device 4000 is preferably a lithium battery, and may also be a nickel-metal hydride battery or other types of rechargeable batteries.

[0049] The dust removal device 2000 includes a cup body 2200 that can generate a primary cyclone and has a cup body cavity 2220, a bottom cover 2400 that can shield the cup body cavity 2220, a filter screen cover 5000 that is detachably located in the cup body cavity 2220, and a multi-stage cyclone 6000 that is located in the filter screen cover 5000 and downstream thereof. A circuit hole 2420 that allows a circuit to pass through is provided at the center of the bottom cover 2400, and an air inlet hole located on one side of the circuit hole 2420. The center directions of the cup body 2200, the bottom cover 2400, and the filter screen cover 5000 are all located on the same straight line as the center direction of the vacuum generating device 3000. The center direction of the vacuum generating device 3000 is parallel to the horizontal plane.

[0050] The filter screen cover 5000 includes a mesh portion 5200, an extension portion located at one end of the mesh portion 5200 and hollow inside, a dust cover 5400 sleeved on the outside of the extension portion and close to the mesh portion 5200, and a screen fixing portion 5700 located at the other end of the mesh portion 5200. The screen fixing portion 5700 is provided with a plurality of L-shaped locking grooves on the circumferential side. The inner wall of the motor housing is provided with a locking protrusion that locks with the locking groove to achieve a rotating locking fixation. One end of the extension portion is provided close to the bottom cover 2400. The mesh portion 5200 is roughly cylindrical and hollow inside, and its circumferential surface is provided with a plurality of meshes connected to the inside, preferably a metal mesh.

[0051] Combination Figure 4-7As shown, the multi-stage cyclone 6000 includes a cyclone body 6200 having a plurality of cyclone units 6220 and having a central axis direction, and a cyclone cover 6400 detachably mounted on the cyclone body 6200 and having a plurality of cyclone unit air inlets 6420 and a plurality of cyclone unit air outlet pipes 6460; wherein the cyclone cover 6400 also includes a plurality of guides 6440 arranged adjacent to the corresponding cyclone unit air inlets 6420. The plane where the cyclone unit air inlets 6420 are located is at least partially parallel to the central axis direction. The guide 6440 has a first guide end and a second guide end, wherein the cyclone unit air inlet 6420 has a first air inlet edge and a second air inlet edge, wherein the second guide end is located outside the second air inlet edge. The guide 6440 is at least partially in a straight line or an arc shape, wherein the first guide end is away from the first air inlet edge, and the second guide end is close to the second air inlet edge. The outer side of the guide 6440 is in contact with the inner wall of the filter screen cover 5000. In this embodiment, there are six guides 6440 evenly arranged around the cyclone body 6200, and there are also six cyclone units 6220, and each guide 6440 is arranged adjacent to the corresponding cyclone unit 6220. After the airflow separated by the primary cyclone flows out from the downstream end of the mesh of the filter screen cover 5000, it is orderly guided by each guide 6440, that is, it is divided into six sub-airflows, and then each sub-airflow enters the cyclone unit air inlet 6420, and then undergoes secondary cyclone separation inside the cyclone unit 6220.

[0052] This embodiment further includes a motor front filter 7000 located between the multi-stage cyclone 6000 and the vacuum generating device 3000, a motor rear filter 7200 located outside the motor front filter 7000 and located downstream of the vacuum generating device 3000, a conductive needle 7400 located in the circuit hole 2420, and a wire 7600 connected to the conductive needle 7400 at one end and connected to the power supply device 4000 at the other end, wherein the wire 7600 at least partially passes through the interior of the multi-stage cyclone 6000 and the interior of the handle housing and is electrically connected to the power supply device 4000. The bottom of the power supply device 4000 is on a plane, and the center direction of the vacuum generating device 3000 is parallel to the plane.

[0053] like Figure 4-14As shown, the present invention discloses a second embodiment of a multi-stage cyclone, which comprises a cyclone body 6200 having a plurality of cyclone units 6220 and having a central axis direction, a cyclone cover 6400 detachably mounted on the cyclone body 6200 and having a plurality of cyclone unit air inlets 6420 and a plurality of cyclone unit air outlet pipes 6460, an air outlet cover plate 6600 located at one end of the cyclone cover 6400 and connected to the plurality of cyclone unit air outlet pipes 6460, and a sealing gasket 6500 located between the cyclone cover 6400 and the air outlet cover plate 6600. The cyclone units 6220 are arranged on the cyclone body 6200 at intervals in the circumferential direction and are roughly in the shape of a truncated cone, and have a conical outer surface 6240 exposed outside the cyclone body 6200, one end of which is large and the other end is small, wherein the small end is provided with an ash outlet 6222 for ash falling. The cyclone body 6200 includes a plurality of annular grooves 6250 arranged around the corresponding cyclone units 6220, a channel bottom wall 6260 defining the inner side of the corresponding cyclone unit air inlet 6420, a circumferential partition plate 6262 located at the end of the corresponding air inlet channel wall 6260, a channel outer side wall 6264 located outside the channel bottom wall 6260, a linear groove 6252 arranged on the channel outer side wall 6264, a guide groove 6266 located on the channel outer side wall 6264, and a pair of axial columns 6270 arranged adjacent to the corresponding channel outer side wall 6264 and abutting against and supporting the mesh portion 5200. A plurality of secondary dust collecting chambers 6280 arranged circumferentially and corresponding to the corresponding cyclone units 6220, and an electrical chamber 6290 located in the center and surrounded by the secondary dust collecting chambers 6280 are arranged inside the cyclone body 6200. The secondary dust collecting chamber 6280 is connected to the corresponding dust outlet 6222, and each secondary dust collecting chamber 6280 is independent of each other to reduce dust interference. Each circumferential partition plate 6262 extends in a direction parallel to the central axis. The channel bottom wall 6260 and the channel outer side wall 6264 at least partially define the cyclone unit air inlet 6420 on the cyclone body 6200. The cyclone cover 6400 also includes a plurality of guide members 6440 which are arranged adjacent to the corresponding cyclone unit air inlet 6420 and guide the airflow into the corresponding cyclone unit air inlet 6420, a plurality of outer walls 6430 for defining the outer edge of the corresponding cyclone unit air inlet 6420, a plurality of inner walls 6450 for defining the inner edge of the corresponding cyclone unit air inlet 6420, a spiral air inlet channel 6425 which is connected to the cyclone unit air inlet 6420, a cyclone unit air outlet pipe 6460 which is located at the center of the spiral air inlet channel 6425 and is surrounded by the center of the spiral air inlet channel 6425, and a cyclone cover end face 6470 which extends toward the air outlet cover plate 6600. The outer side wall 6430 and the inner side wall 6450 at least partially define the cyclone unit air inlet 6420 on the cyclone cover 6400 , that is, the cyclone unit air inlet 6420 is defined by the cyclone body 6200 and the cyclone cover 6400 .The guide member 6440 has a first end 6442 of the guide member which is at least partially received by the guide member groove 6266, and a second end of the guide member. In this embodiment, the guide member groove 6266 can be used to fix the first end 6442 of the guide member, or a step surface can be used to replace it to achieve the purpose of the present invention; wherein the guide member 6440 is at least partially in a straight line or arc shape, and the outer wall 6430 has an outer wall first edge and an outer wall second edge in the axial direction, and the second end of the guide member is located outside the outer wall second edge and at least partially defines the cyclone unit air inlet 6420; wherein the end surface of the first end 6442 of the guide member and the first edge of the outer wall are on the same plane, and are also on the same plane as the corresponding end surface of the inner wall 6450, and the second end of the guide member is between the second edge of the outer wall and the end surface 6470 of the cyclone cover. The end surface of the first end 6442 of the guide member and the first edge of the outer wall are preferably secondary rubber-coated, and the end surface of the first edge of the outer wall is received by the linear groove 6252. The annular groove 6250 receives part of the surface of the spiral air inlet channel 6425. Since the cyclone cover 6400 is provided with a rubber package on the side facing the cyclone body 6200, the axial sealing connection between the cyclone body 6200 and the cyclone cover 6400 is ensured to prevent airflow leakage. The outer side of the guide 6440 is in contact with the inner wall of the filter screen cover 5000. The end face 6470 of the cyclone cover is in contact with the sealing gasket 6500 to achieve a sealing fit between the cyclone cover 6400 and the air outlet cover plate 6600. The air outlet cover plate 6600 is generally disc-shaped, and includes a plurality of cyclone air outlet pipes 6640 protruding toward the cyclone cover 6400, and an outer edge 6660 of the cover plate located on the outside, wherein each cyclone air outlet pipe 6640 is interconnected with the corresponding cyclone unit air outlet pipe 6460, and the cyclone air outlet pipes 6640 are arranged circumferentially spaced near the center of the air outlet cover plate 6600 and maintain a radial gap with the outer edge 6660 of the cover plate. A pair of cover plate wire holes 6664 are provided on the outer edge 6660 of the cover plate. The central axis of a cyclone unit air outlet pipe 6460 is located outside the central axis of the corresponding cyclone air outlet pipe 6640. The central axis of the cyclone air outlet pipe 6640 is obliquely intersected with the central axis of the cyclone unit air outlet pipe 6460.

[0054] like Figure 8 and 10 As shown, the present invention further includes a wire 7440 having one end electrically connected to the conductive needle 7400, and an electrical contact point 7460 having one end connected to the other end of the wire 7440 and the other end electrically connected to the wire 7600. The wire 7440 is at least partially exposed outside the mesh portion 5200, and partially located in the electrical chamber 6290. The electrical contact point 7460 is located in the wire hole 6664 of the cover plate and is a positive and negative electrode.

[0055] The present invention also discloses a third embodiment of a method, which comprises the following steps:

[0056] S1: A multi-stage cyclone is provided; wherein the multi-stage cyclone 6000 comprises a cyclone body 6200 having a plurality of cyclone units 6220 and having a central axis direction, and a cyclone cover 6400 detachably mounted on the cyclone body 6200 and having a plurality of cyclone unit air inlets 6420 and a plurality of cyclone unit air outlet pipes 6460; wherein the cyclone cover 6400 further comprises a plurality of guide members 6440 disposed adjacent to the corresponding cyclone unit air inlets 6420;

[0057] S2: The fine dust-containing airflow first enters the multi-stage cyclone along the central axis direction, and then enters the corresponding cyclone unit air inlet 6420 along the guiding direction of the guide member 6440;

[0058] S3: The fine dust-containing airflow continues to perform secondary cyclone separation in the corresponding multiple cyclone units 6220 along the tangential direction of the cyclone unit air inlet 6420;

[0059] S4: The separated airflow then flows out of the cyclone body 6200 through the cyclone unit outlet pipe 6460 to the end.

[0060] The present invention also discloses a fourth embodiment of a method, which comprises the following steps:

[0061] S100: A vacuum cleaner is provided, which includes a housing 1000, a dust removal device 2000 detachably matched with the housing 1000, and a vacuum generating device 3000 located in the housing 1000 and downstream of the dust removal device 2000, wherein the dust removal device 2000 includes a cup body 2200 that can generate a primary cyclone and has a cup body cavity 2220, a filter screen cover 5000 detachably located in the cup body cavity 2220, and a multi-stage cyclone 6000 located in the filter screen cover 5000 and downstream thereof; wherein the multi-stage cyclone 6000 includes a plurality of cyclone units 6220 and A cyclone body 6200 having a central axis direction, and a cyclone cover 6400 detachably mounted on the cyclone body 6200 and having a plurality of cyclone unit air inlets 6420 and a plurality of cyclone unit air outlet pipes 6460; wherein the cyclone cover 6400 further comprises a plurality of guide members 6440 disposed adjacent to the corresponding cyclone unit air inlets 6420, wherein the axis direction of the vacuum generating device 3000 is in the same straight line with the central axis direction of the cyclone body 6200, and the central axis direction of the cup body 2200 is in the same straight line with the central axis direction of the cyclone body 6200;

[0062] S200: The dust-laden airflow enters the cup cavity 2220 of the cup body 2200 tangentially along the central axis direction, and performs primary cyclone separation to separate large dust particles;

[0063] S300: the airflow after primary cyclone separation is further filtered by the filter screen 5000, and the dust with a diameter larger than the diameter of the mesh is blocked by the mesh, thereby the dust is further separated;

[0064] S400: The fine dust-containing airflow enters the multi-stage cyclone 6000 along the central axis direction, and then enters the corresponding cyclone unit air inlet 6420 along the guiding direction of the multiple guide members 6440, wherein the airflow separated by the primary cyclone flows out from the downstream end of the mesh of the filter screen 5000, and is orderly guided by each guide member 6440, i.e., is divided into six sub-airflows, and then each sub-airflow enters the cyclone unit air inlet 6420;

[0065] S500: the fine dust-containing airflow continues along the tangential direction of the cyclone unit air inlet 6420, and then performs secondary cyclone separation in the corresponding multiple cyclone units 6220 to separate the fine dust;

[0066] S600: The separated airflow then flows out of the cyclone body 6200 through the cyclone unit air outlet pipe 6460 to the end.

[0067] The present invention guides the airflow in an orderly manner by guiding each air inlet of the multi-stage cyclone accordingly, reduces wind resistance, improves the secondary cyclone separation performance, and avoids airflows from colliding with each other, thereby reducing airflow noise.

[0068] Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vacuum cleaner with a multi-stage cyclone, characterized in that The invention comprises a housing (1000), a dust removal device (2000) detachably matched with the housing (1000), and a vacuum generating device (3000) located in the housing (1000) and downstream of the dust removal device (2000), wherein the dust removal device (2000) comprises a cup body (2200) capable of generating a primary cyclone and having a cup body cavity (2220), a filter screen (5000) detachably located in the cup body cavity (2220), and a multi-stage cyclone located in the filter screen (5000) and downstream thereof. A blower (6000); wherein the multi-stage cyclone (6000) comprises a cyclone body (6200) having a plurality of cyclone units (6220) and having a central axis direction, and a cyclone cover (6400) detachably mounted on the cyclone body (6200) and having a plurality of cyclone unit air inlets (6420) and a plurality of cyclone unit air outlet pipes (6460); wherein the cyclone cover (6400) further comprises a plurality of guide members (6440) arranged adjacent to the corresponding cyclone unit air inlets (6420).

2. The vacuum cleaner according to claim 1, characterized in that: The plane where the cyclone unit air inlet (6420) is located is at least partially parallel to the direction of the central axis.

3. The vacuum cleaner according to claim 1, characterized in that: The guide member (6440) has a first guide member end and a second guide member end, wherein the cyclone unit air inlet (6420) has a first air inlet edge and a second air inlet edge in the axial direction, wherein the guide member second end is located outside the second air inlet edge.

4. The vacuum cleaner according to claim 3, characterized in that: The guide member (6440) is at least partially straight or arc-shaped, wherein the first end of the guide member is far away from the second edge of the air inlet, and the second end of the guide member is close to the second edge of the air inlet.

5. The vacuum cleaner according to claim 1, characterized in that: The outer side of the guide member (6440) is in contact with the inner wall of the filter screen cover (5000).

6. A multi-stage cyclone, characterized in that It includes a cyclone body (6200) having multiple cyclone units (6220) and having a central axis direction, and a cyclone cover (6400) detachably mounted on the cyclone body (6200) and having multiple cyclone unit air inlets (6420) and multiple cyclone unit air outlet pipes (6460); wherein the cyclone cover (6400) also includes multiple guide members (6440) arranged adjacent to the corresponding cyclone unit air inlets (6420) and guiding the airflow into the corresponding cyclone unit air inlets (6420).

7. The multi-stage cyclone according to claim 6, characterized in that It includes a channel bottom wall (6260) that defines the inner side of the corresponding cyclone unit air inlet (6420), a circumferential partition plate (6262) located at the end of the corresponding air inlet channel wall (6260), a channel outer side wall (6264) located outside the channel bottom wall (6260), and a plurality of guide member grooves (6266) located on the channel outer side wall (6264) and at least partially accommodating one end of the guide member (6440).

8. The multi-stage cyclone according to claim 6, characterized in that It comprises an air outlet cover plate (6600) which is located at one end of a cyclone cover (6400) and is connected to a plurality of cyclone unit air outlet pipes (6460), wherein the air outlet cover plate (6600) is provided with a plurality of cyclone air outlet pipes (6640); wherein each cyclone air outlet pipe (6640) is interconnected with a corresponding cyclone unit air outlet pipe (6460); and a central axis of the cyclone unit air outlet pipe (6460) is located outside the central axis of the corresponding cyclone air outlet pipe (6640), and the central axis of the cyclone air outlet pipe (6640) is obliquely intersecting with the central axis of the cyclone unit air outlet pipe (6460).

9. A method, characterized in that It includes the following steps: S1: A multi-stage cyclone is provided; wherein the multi-stage cyclone 6000 comprises a cyclone body (6200) having a plurality of cyclone units (6220) and having a central axis direction, and a cyclone cover (6400) detachably mounted on the cyclone body (6200) and having a plurality of cyclone unit air inlets (6420) and a plurality of cyclone unit air outlet pipes (6460); wherein the cyclone cover (6400) further comprises a plurality of guide members (6440) arranged adjacent to the corresponding cyclone unit air inlets (6420); S2: The fine dust-containing airflow first enters the multi-stage cyclone along the central axis direction, and then enters the corresponding cyclone unit air inlet (6420) along the guiding direction of the guide member (6440); S3: the fine dust-containing airflow continues to be separated by secondary cyclones in the corresponding multiple cyclone units (6220) along the tangential direction of the cyclone unit air inlet (6420); S4: The separated airflow then flows out of the cyclone body (6200) through the cyclone unit outlet pipe (6460) to the end.

10. A method, characterized in that It includes the following steps: S100: A vacuum cleaner is provided, comprising a shell, a dust removal device detachably matched with the shell, and a vacuum generating device located in the shell and downstream of the dust removal device, wherein the dust removal device comprises a cup body capable of generating a primary cyclone and having a cup body cavity, a filter screen cover detachably located in the cup body cavity, and a multi-stage cyclone located in the filter screen cover and downstream thereof; wherein the multi-stage cyclone comprises a cyclone body having a plurality of cyclone units and having a central axis direction, and a cyclone cover detachably mounted on the cyclone body and having a plurality of cyclone unit air inlets and a plurality of cyclone unit air outlet pipes; wherein the cyclone cover further comprises a plurality of guide members arranged adjacent to the corresponding cyclone unit air inlets; S200: The dust-laden airflow enters the cup cavity of the cup body tangentially along the central axis direction, and performs primary cyclone separation to separate large dust particles; S300: The airflow after primary cyclone separation is further filtered by the filter screen, while dust with a diameter larger than the mesh diameter is blocked by the mesh; S400: The fine dust-containing airflow enters the multi-stage cyclone along the central axis direction, and then enters the air inlet of the corresponding cyclone unit along the guiding direction of the multiple guide members; S500: the fine dust-containing airflow continues along the tangential direction of the air inlet of the cyclone unit, and then performs secondary cyclone separation in the corresponding multiple cyclone units to separate the fine dust; S600: The separated airflow then flows out of the cyclone body through the cyclone unit outlet pipe until the end.

Images