Multi-stage dust collecting device and dust collector

Abstract

The present invention relates to the technical field of vacuum cleaners, and specifically to a multi-stage dust collecting device and a vacuum cleaner. The multi-stage dust collecting device includes: a dust cup; a secondary dust collecting unit, at least partially nested inside the dust cup; a dust cup drain port and a secondary drain port, formed by the dust cup and the secondary dust collecting unit penetrating in the same direction respectively; a dust cup bottom cover, opened and closed on the dust cup, the dust cup bottom cover including a first position state for simultaneously blocking the dust cup drain port and the secondary drain port, and a second position state for simultaneously opening the dust cup drain port and the secondary drain port; and a sealing assembly, adapted to seal the interface between the dust cup bottom cover and the dust cup drain port through at least two layers of sealing parts when the dust cup bottom cover is in the first position state, and to seal the interface between the dust cup bottom cover and the secondary drain port through at least two layers of sealing parts. The present invention plays a role of simultaneous sealing, ensuring that the spaces of the two parts of the dust collecting chamber are separated from each other and are both blocked from the outside.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum cleaners, and in particular to a multi-stage dust collecting device and a vacuum cleaner. Background Art

[0002] A dust cup for holding dust is often provided on a vacuum cleaner. The dust cup is provided with an interface position connected to a vacuum generating device and an interface position connected to an air intake port. When the vacuum cleaner is working, the dust cup needs to be sealed to ensure that the negative pressure generated by the vacuum generating device is not lost, thereby ensuring that the suction power of the vacuum cleaner is not lost. If the dust in the dust cup is to be discharged, an opening needs to be reserved for the discharge of the dust. When discharge is not required, the discharge port needs to be closed and well sealed. Especially for vacuum cleaners with multi-stage separation devices, they often have multi-stage dust collecting chambers. Each stage of the dust collecting chamber is used to collect dust of different particle sizes. When discharging dust, each stage of the dust collecting chamber needs to be opened at the same time, and when closed, each stage of the dust collecting chamber needs to be independently and well sealed. How to well seal the discharge port of a dust cup with a multi-stage dust collecting chamber is a problem that needs to be solved in the prior art. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor sealing effect of multi-stage sewage outlets in the prior art, thereby providing a multi-stage dust collecting device with good sealing effect.

[0004] Another technical problem to be solved by the present invention is to overcome the defect of poor sealing effect of the multi-stage sewage outlet of the multi-stage dust collecting device in the prior art, thereby providing a vacuum cleaner with good sealing effect.

[0005] In order to solve the above technical problems, the present invention provides a multi-stage dust collecting device, comprising:

[0006] dust cup;

[0007] a secondary dust collecting unit, at least partially nested within the dust cup;

[0008] The dust cup sewage outlet and the secondary sewage outlet are formed by the dust cup and the secondary dust collecting unit penetrating in the same direction respectively;

[0009] A dust cup bottom cover is opened and closed on the dust cup, wherein the dust cup bottom cover includes a first position state in which the dust cup drain outlet and the secondary drain outlet are blocked at the same time, and a second position state in which the dust cup drain outlet and the secondary drain outlet are opened at the same time; and

[0010] The sealing assembly is suitable for sealing the interface between the dust cup bottom cover and the dust cup sewage outlet through at least two layers of sealing parts when the dust cup bottom cover is in the first position, and sealing the interface between the dust cup bottom cover and the secondary sewage outlet through at least two layers of sealing parts.

[0011] Optionally, the sealing assembly includes: a sealing ring, which is constructed as an annular structure connected end to end, and the sealing ring is fixedly connected to the dust cup bottom cover or the secondary dust collecting unit, and when the dust cup bottom cover is in the first position, it abuts against the secondary dust collecting unit or the dust cup bottom cover through at least two layers of sealing parts.

[0012] Optionally, the secondary dust collecting unit includes: a mounting groove or a mounting rib, wherein the mounting groove or the mounting rib surrounds the outer edge or the inner edge of the secondary sewage outlet;

[0013] The sealing ring is formed with a mounting rib or a mounting groove corresponding to the mounting groove or the mounting rib, and the mounting rib is sleeve-connected with the mounting groove.

[0014] Optionally, the sealing ring further comprises: a closing portion formed by shrinking at least a portion of the sealing ring toward the central axis along the radial direction;

[0015] The abutting portion is formed by extending outwardly in the radial direction from one end of the sealing ring away from the mounting rib.

[0016] Optionally, a boss is formed on the dust cup bottom cover corresponding to the secondary sewage outlet, and when the dust cup bottom cover is in the first position, the boss is suitable for abutting and connecting with the sealing ring.

[0017] Optionally, the boss includes: a boss sealing surface, which is formed around the outer surface of the boss and is suitable for being sleeve-connected with the closing portion when the dust cup bottom cover is in the first position.

[0018] Optionally, the boss sealing surface is interference fit with the closing portion.

[0019] Optionally, when the dust cup bottom cover is in the first position, the abutment portion surrounds the boss and is abutted against the dust cup bottom cover.

[0020] Optionally, the sealing assembly includes: a sealing ring, suitable for sealing the interface between the dust cup bottom cover and the dust cup discharge port through at least two layers of sealing parts; the sealing ring forms an annular structure connected end to end and matches the inner edge shape of the dust cup discharge port.

[0021] Optionally, the sealing ring includes:

[0022] an extension portion extending outwardly from the outer edge of the sealing ring in a horizontal direction; and

[0023] The skirt portion extends outward from the upper edge of the sealing ring and is arranged at an angle to the extension portion.

[0024] Optionally, a dust cup ridge is provided on the inner edge of the dust cup discharge port, and the dust cup ridge protrudes relative to the inner surface of the dust cup and surrounds the dust cup discharge port. When the dust cup bottom cover is in the first position, the dust cup ridge is suitable for at least partially fitting with the sealing ring.

[0025] Optionally, the dust cup ridge includes: a sealing protrusion formed on the side of the dust cup ridge and suitable for abutting against the skirt portion when the dust cup bottom cover is in the first position.

[0026] Optionally, the dust cup ridge also includes: a sealing and pressing portion formed on the bottom surface of the dust cup ridge, and suitable for pressing the extension portion between the dust cup ridge and the dust cup bottom cover by the sealing and pressing portion when the dust cup bottom cover is in the first position.

[0027] The vacuum cleaner provided by the present invention comprises: a vacuum cleaner body, and the dust collecting device as described above.

[0028] The technical solution of the present invention has the following advantages:

[0029] 1. The multi-stage dust collecting device provided by the present invention seals the interface between the dust cup bottom cover and the dust cup sewage outlet through at least two layers of sealing parts by setting a sealing component, and seals the interface between the dust cup bottom cover and the secondary sewage outlet, thereby achieving a simultaneous sealing effect to ensure that the spaces of the two parts of the dust collecting chamber are separated from each other, and the two parts of the dust collecting chamber are blocked from the outside.

[0030] 2. The multi-stage dust collecting device provided by the present invention realizes the sealing at the interface between the dust cup bottom cover and the secondary dust collecting unit by setting a sealing ring, and the sealing ring is sealed by at least two layers of sealing parts, thereby improving the sealing effect and ensuring that the dust cup bottom cover can form a good seal when it is in the first position state of blocking the secondary sewage outlet of the secondary dust collecting unit.

[0031] 3. The multi-stage dust collection device provided by the present invention realizes the installation connection between the sealing ring and the secondary dust collection unit through the cooperation of the installation groove and the installation rib. The two are engaged with each other through the groove and rib features, so that the sealing ring can be firmly fixed to the secondary dust collection unit and cannot be easily moved up or down, thereby preventing the sealing ring from being pulled off the secondary dust collection unit when the dust cup bottom cover is opened and closed.

[0032] 4. The multi-stage dust collecting device provided by the present invention forms a closing portion on the sealing ring, and the closing portion is formed by shrinking at least a part of the sealing ring along the radial direction toward the central axis, so that the closing portion has a smaller inner diameter. When fitting with the boss, it can be tighter and is always in a compressed state through elastic fitting, thereby ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a schematic diagram of the decomposition state of the dust collecting device;

[0035] Figure 2 This is a schematic diagram of the dust cup bottom cover;

[0036] Figure 3 Schematic diagram of the cross section of the dust cup;

[0037] Figure 4 is a cross-sectional view of the sealing ring;

[0038] Figure 5 Schematic diagram of the cross section of the dust cup bottom cover;

[0039] Figure 6 is a cross-sectional view of a dust collecting device;

[0040] Figure 7 for Figure 6 A magnified view of point A;

[0041] Figure 8 for Figure 6 Enlarged view of point B;

[0042] Figure 9 It is a front view of the dust collecting device;

[0043] Figure 10 for Figure 9 Schematic diagram of the middle CC section;

[0044] Figure 11 for Figure 10 Enlarged view of point D in the middle;

[0045] Figure 12 It is a schematic diagram of the disassembled state of the multi-stage dust collection device;

[0046] Figure 13 It is a partial cross-sectional schematic diagram of a multi-stage dust collecting device;

[0047] Figure 14 It is a cross-sectional schematic diagram of a multi-stage dust collecting device;

[0048] Figure 15 It is a front view of a multi-stage dust collecting device;

[0049] Figure 16 for Figure 15 Schematic diagram of the middle EE section;

[0050] Figure 17 for Figure 16 Enlarged view of point F in the middle.

[0051] Description of reference numerals:

[0052] 10-dust cup, 11-hinge hole, 12-dust cup convex edge, 121-sealing protrusion, 122-sealing pressing part, 13-fixing buckle, 14-dust cup drain outlet;

[0053] 20-sealing ring, 21-skirt portion, 22-extension portion, 23-positioning portion;

[0054] 30 - dust cup bottom cover, 31 - hinge column, 32 - elastic buckle, 33 - bottom plate, 34 - bottom cover convex edge, 35 - positioning groove, 36 - avoidance gap, 37 - boss, 371 - boss sealing surface;

[0055] 40-secondary dust collection unit, 41-installation slot, 42-secondary sewage outlet;

[0056] 50-sealing ring, 51-guide portion, 52-mounting rib, 53-closing portion, 54-abutting portion;

[0057] 90-main unit, S1-low pressure area, S2-high pressure area, P1-first dust collecting chamber, P2-second dust collecting chamber. DETAILED DESCRIPTION

[0058] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0059] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0061] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0062] Example 1

[0063] Combine Figures 1-11 As shown, the dust collecting device provided in this embodiment includes:

[0064] Dust cup 10;

[0065] The dust cup drain port 14 is at least partially disposed through the dust cup 10;

[0066] The dust cup bottom cover 30 is opened and closed on the dust cup 10, and the dust cup bottom cover 30 includes a first position state for blocking the dust cup drain outlet 14 and a second position state for opening the dust cup drain outlet 14; and

[0067] The sealing ring 20 is suitable for sealing the interface between the dust cup bottom cover 30 and the dust cup sewage outlet 14 through at least two layers of sealing parts.

[0068] The dust collecting device provided in this embodiment realizes the sealing at the interface between the dust cup bottom cover 30 and the dust cup sewage outlet 14 by providing a sealing ring 20, and the sealing ring 20 is sealed by at least two layers of sealing parts, thereby improving the sealing effect and ensuring that the dust cup bottom cover 30 can form a good seal when it is in the first position state of blocking the dust cup sewage outlet 14.

[0069] The two layers of sealing parts used to seal the interface between the dust cup bottom cover 30 and the dust cup sewage outlet 14 are: a first layer of sealing part composed of a sealing protrusion 121 and a skirt portion 21 abutting against each other, and a second layer of sealing part composed of a sealing pressing portion 122 and an extension portion 22 abutting against each other. The specific structural form will be described in detail below.

[0070] Preferably, the dust cup 10 is constructed as a cylindrical structure. In this embodiment, the side wall of the dust cup 10 forms an interface position connected to the air intake port, the top of the dust cup 10 is penetrated to form an interface position connected to the vacuum generating device, and the bottom of the dust cup 10 forms the dust cup discharge port 14, so that when the dust cup bottom cover 30 is opened, the dust and dirt can naturally fall from the dust cup discharge port 14 under the action of gravity, making it convenient to dump the dust and dirt.

[0071] Preferably, the dust cup bottom cover 30 includes a bottom plate 33 , which serves as the main body of the dust cup bottom cover 30 and is suitable for forming structures such as a bottom cover convex edge 34 and a boss 37 on the bottom plate 33 .

[0072] Specifically, the sealing ring 20 forms an annular structure connected end to end and matches the shape of the inner edge of the dust cup discharge port 14. This facilitates the sealing ring 20 to form a good seal when it fits with the inner edge of the dust cup discharge port 14.

[0073] Preferably, the sealing ring 20 is made of elastic material.

[0074] Specifically, the sealing ring 20 includes:

[0075] An extension portion 22 is formed by extending outwardly from the outer edge of the sealing ring 20 in a horizontal direction; and

[0076] The skirt portion 21 extends outward from the upper edge of the sealing ring 20 and is arranged at an angle to the extension portion 22 .

[0077] In the dust collecting device provided in this embodiment, the extension portion 22 and the skirt portion 21 are both formed by extending outward from the main body of the sealing ring 20, so that the sealing ring 20 forms a double-layer sealing edge in the cross section, which is convenient for forming a double-layer sealing effect when cooperating with the corresponding structure on the dust cup discharge port 14.

[0078] Specifically, the skirt portion 21 and the extension portion 22 are arranged at an acute angle, thereby facilitating the sealing contact surfaces of the skirt portion 21 and the extension portion 22 to be close to each other, thereby enhancing the sealing effect.

[0079] Specifically, a dust cup ridge 12 is provided on the inner edge of the dust cup discharge port 14. The dust cup ridge 12 protrudes relative to the inner surface of the dust cup 10 and surrounds the dust cup discharge port 14. When the dust cup bottom cover 30 is in the first position, the dust cup ridge 12 is suitable for at least partially fitting with the sealing ring 20.

[0080] The dust collecting device provided in this embodiment has the dust cup convex edge 12 as a structure on the dust cup sewage outlet 14 that contacts and cooperates with the sealing ring 20. The dust cup convex edge 12 is protruded relative to the inner surface of the dust cup 10 and surrounds the dust cup sewage outlet 14. It can increase the sealing effect and the contact area between the dust cup convex edge 12 and the sealing ring 20, facilitate cooperation, and improve the fault tolerance. Moreover, the protrusion relative to the inner surface of the dust cup 10 can play a downward pressing role when the dust cup bottom cover 30 is buckled with the inner edge of the dust cup sewage outlet 14, thereby improving the sealing effect and facilitating tight contact.

[0081] Specifically, the dust cup ridge 12 includes: a sealing protrusion 121 formed on the side of the dust cup ridge 12 and suitable for abutting against the skirt portion 21 when the dust cup bottom cover 30 is in the first position.

[0082] In the dust collecting device provided in this embodiment, the sealing protrusion 121 abuts against the skirt portion 21 to form a first sealing layer.

[0083] Preferably, the sealing protrusion 121 is arranged obliquely on the inner edge of the dust cup discharge port 14. When the sealing protrusion 121 abuts against the skirt portion 21, the skirt portion 21 can be at least partially bent, so that the skirt portion 21 increases the contact area with the sealing protrusion 121, thereby improving the sealing effect.

[0084] Preferably, the thickness of the skirt portion 21 at the end away from the body of the sealing ring 20 is smaller than the thickness at the end close to the body of the sealing ring 20, so as to ensure the stability of the supporting structure.

[0085] Specifically, the dust cup ridge 12 also includes: a sealing and pressing portion 122, which is formed on the bottom surface of the dust cup ridge 12 and is suitable for pressing the extension portion 22 between the dust cup ridge 12 and the dust cup bottom cover 30 by the sealing and pressing portion 122 when the dust cup bottom cover 30 is in the first position.

[0086] The dust collecting device provided in this embodiment forms a second sealing layer by abutting the sealing pressing part 122 with the extension part 22, and presses the extension part 22 between the dust cup convex edge 12 and the dust cup bottom cover 30. By abutting the skirt part 21 and pressing the extension part 22, different contact forms are adopted. Compared with a single contact form, the sealing effect is improved, wind is prevented from entering from different angles, and the fault tolerance rate is improved.

[0087] Specifically, the dust cup bottom cover 30 is also provided with: a bottom cover convex edge 34, which is formed around the upper surface of the dust cup bottom cover 30 and is suitable for directly or indirectly abutting and connecting with the dust cup convex edge 12 when the dust cup bottom cover 30 is in the first position.

[0088] Specifically, the indirect abutting connection between the bottom cover convex edge 34 and the dust cup convex edge 12 includes: using the sealing ring 20 as an intermediate layer to make the bottom cover convex edge 34 abut against the dust cup convex edge 12.

[0089] By forming a bottom cover convex edge 34 around the dust cup bottom cover 30, the bottom cover convex edge 34 is directly or indirectly abutted against the dust cup convex edge 12, which facilitates the positioning of the sealing ring 20, improves the support for the sealing ring 20, and ensures the sealing effect.

[0090] Specifically, a positioning portion 23 or a positioning groove 35 is formed on at least a partial area of ​​the sealing ring 20, and a positioning groove 35 or a positioning portion 23 is provided on the dust cup bottom cover 30 corresponding to the positioning portion 23 or the positioning groove 35. The positioning groove 35 is suitable for snapping with the positioning portion 23 to install the sealing ring 20 on the dust cup bottom cover 30.

[0091] Preferably, in this embodiment, the positioning portion 23 is provided on the sealing ring 20 , and correspondingly, the positioning groove 35 is provided on the dust cup bottom cover 30 .

[0092] The dust collection device is installed in a vacuum cleaner for use. When the vacuum cleaner is in operation, the vacuum generating device continuously draws air into the dust cup, forming a low-pressure region S1 inside the dust cup. The external environment and the space between the extension and the skirt portion are relatively defined as a high-pressure region S2. The skirt portion is located between the high-pressure and low-pressure regions. The air in the high-pressure region pushes the skirt portion upward, causing it to more tightly contact the sealing protrusion 121, thereby improving the sealing effect.

[0093] Preferably, the dust collecting device provided in this embodiment has the following three sealing positions:

[0094] The first sealing position is formed by the contact between the sealing protrusion 121 and the skirt portion 21; the second sealing position is formed by the contact between the sealing pressing portion 122 and the extension portion 22; and the third sealing position is formed by the engagement between the positioning portion 23 and the positioning groove 35. These three positions are all interference fits, utilizing the elasticity of the sealing ring to elastically press it into the body, ensuring full contact and improving the sealing effect.

[0095] Specifically, the dust cup bottom cover 30 is also formed with: an avoidance gap 36, which is formed by at least a partial depression of the dust cup bottom cover 30, and is suitable for reserving deformation space for the extension part 22 when the sealing pressing part 122 presses the extension part 22 between the dust cup convex edge 12 and the dust cup bottom cover 30.

[0096] Preferably, when the dust cup bottom cover 30 is closed, the sealing pressing portion 122 presses the extension portion 22 downward, and the extension portion 22 bends downward. The avoidance gap 36 is a space for avoiding the extension portion 22 from bending and deforming.

[0097] Specifically, a hinge hole 11 or a hinge column 31 is formed on the dust cup 10, and a hinge column 31 or a hinge hole 11 is formed on the dust cup bottom cover 30 corresponding to the hinge hole 11 or the hinge column 31. The hinge column 31 is hingedly connected to the hinge hole 11 to realize the rotation of the dust cup bottom cover 30 relative to the dust cup 10.

[0098] Preferably, in this embodiment, the hinge hole 11 is provided on the dust cup 10 , and the hinge column 31 is provided on the dust cup bottom cover 30 .

[0099] Specifically, a fixing buckle 13 or an elastic buckle 32 is formed on at least a partial area of ​​the outer edge of the dust cup 10, and an elastic buckle 32 or a fixing buckle 13 is formed on the dust cup bottom cover 30 corresponding to the fixing buckle 13 or the elastic buckle 32. The elastic buckle 32 is selectively engaged with the fixing buckle 13 and is suitable for switching the locked and unlocked states of the dust cup bottom cover 30 and the dust cup 10.

[0100] Preferably, in this embodiment, the fixing buckle 13 is arranged on the outer edge of the dust cup 10 , and the elastic buckle 32 is arranged on the dust cup bottom cover 30 .

[0101] Preferably, the elastic buckle 32 has a certain deformation amount under the action of the external force, and the user can pull the elastic buckle 32 to move the elastic buckle 32 away from the fixed buckle 13, thereby unlocking and facilitating the opening of the dust cup bottom cover 30.

[0102] Example 2

[0103] On the basis of the dust collecting device provided in the above-mentioned embodiment 1, the number of dust collecting chambers of the dust collecting device can also be increased by adding a secondary dust collecting unit. While increasing the number of dust collecting chambers, the sealing of multiple dust collecting chambers is also an important problem to be solved in this solution. The following is a detailed description taking a two-stage dust collecting device as an example.

[0104] Combine Figure 12-17 As shown, the multi-stage dust collecting device provided in this embodiment includes:

[0105] Dust cup 10;

[0106] The secondary dust collecting unit 40 is at least partially nested inside the dust cup 10;

[0107] The dust cup drain outlet 14 and the secondary drain outlet 42 are formed by the dust cup 10 and the secondary dust collecting unit 40 penetrating in the same direction respectively;

[0108] The dust cup bottom cover 30 is opened and closed on the dust cup 10, and the dust cup bottom cover 30 includes a first position state in which the dust cup drain outlet 14 and the secondary drain outlet 42 are blocked at the same time, and a second position state in which the dust cup drain outlet 14 and the secondary drain outlet 42 are opened at the same time; and

[0109] The sealing assembly is suitable for sealing the interface between the dust cup bottom cover 30 and the dust cup sewage outlet 14 through at least two layers of sealing parts when the dust cup bottom cover 30 is in the first position, and sealing the interface between the dust cup bottom cover 30 and the secondary sewage outlet 42 through at least two layers of sealing parts.

[0110] Preferably, the first dust collecting chamber P1 is defined between the interior of the dust cup 10 and the outer wall of the second dust collecting unit 40, and the second dust collecting chamber P2 is defined inside the inner wall of the second dust collecting unit 40. A sealing assembly is provided inside the first dust collecting chamber and the second dust collecting chamber to ensure the spatial separation of the two dust collecting chambers.

[0111] The multi-stage dust collecting device provided in this embodiment seals the interface between the dust cup bottom cover 30 and the dust cup sewage outlet 14 through at least two layers of sealing parts by setting a sealing component, and seals the interface between the dust cup bottom cover 30 and the secondary sewage outlet 42, thereby achieving a simultaneous sealing effect to ensure that the spaces of the two parts of the dust collecting chamber are separated from each other, and the two parts of the dust collecting chamber are blocked from the outside.

[0112] Preferably, the secondary dust collecting unit 40 is at least partially nested inside the dust cup 10, and in this embodiment, the secondary dust collecting unit 40 is arranged parallel to the axis of the dust cup 10.

[0113] Specifically, the sealing assembly includes: a sealing ring 50, which is constructed as an annular structure connected end to end. The sealing ring 50 is fixedly connected to the dust cup bottom cover 30 or the secondary dust collecting unit 40, and when the dust cup bottom cover 30 is in the first position, it abuts against the secondary dust collecting unit 40 or the dust cup bottom cover 30 through at least two layers of sealing parts.

[0114] The multi-stage dust collection device provided in this embodiment realizes the sealing at the interface between the dust cup bottom cover 30 and the secondary dust collection unit 40 by setting a sealing ring 50, and the sealing ring 50 is sealed by at least two layers of sealing parts, thereby improving the sealing effect and ensuring that the dust cup bottom cover 30 can form a good seal when it is in the first position state of blocking the secondary sewage outlet 42 of the secondary dust collection unit 40.

[0115] Specifically, the secondary dust collection unit 40 includes: a mounting groove 41 or a mounting rib 52, and the mounting groove 41 or the mounting rib 52 surrounds the outer edge or the inner edge of the secondary sewage outlet 42;

[0116] The sealing ring 50 is formed with a mounting rib 52 or a mounting groove 41 corresponding to the mounting groove 41 or the mounting rib 52 , and the mounting rib 52 is sleeve-connected with the mounting groove 41 .

[0117] Preferably, in this embodiment, the mounting groove 41 is provided on the secondary dust collecting unit 40 , and the mounting rib 52 is provided on the sealing ring 50 .

[0118] Preferably, there can be multiple mounting grooves 41 and mounting ribs 52, and the multiple mounting grooves 41 or mounting ribs 52 are arranged in parallel to facilitate installation and matching.

[0119] The multi-stage dust collection device provided in this embodiment realizes the installation connection between the sealing ring 50 and the secondary dust collection unit 40 through the cooperation of the installation groove 41 and the installation rib 52. The two are engaged with each other through the groove and rib features, so that the sealing ring 50 can be firmly fixed to the secondary dust collection unit 40 and cannot be easily moved up or down, thereby preventing the dust cup bottom cover 30 from pulling the sealing ring 50 off the secondary dust collection unit 40 when opening and closing.

[0120] Preferably, a guide portion 51 is also formed on the sealing ring 50, and the guide portion 51 is obliquely arranged at the outer edge of the sealing ring 50, so as to provide guidance when the mounting groove 41 of the secondary dust collection unit 40 and the mounting rib 52 of the sealing ring 50 are assembled, thereby facilitating assembly.

[0121] Specifically, the sealing ring 50 further includes: a closing portion 53 formed by shrinking at least a portion of the sealing ring 50 toward the central axis along the radial direction;

[0122] The abutting portion 54 is formed by extending radially outward from one end of the sealing ring 50 away from the mounting rib 52 .

[0123] Preferably, the closing portion 53 has a smaller inner diameter than the inner surface of the sealing ring 50, thereby improving the tightening state during assembly. An abutment portion 54 is provided below the closing portion 53. The inner diameter of the abutment portion gradually expands toward the outside, and its inner diameter variation surface is a curved surface. In addition, the thickness of the abutment portion 54 gradually decreases as it extends in the axial direction. Therefore, after the sealing ring 50 abuts the dust cup bottom cover 30, the abutment portion 54 of the sealing ring 50 folds outward and is in a compressed and deformed state.

[0124] Specifically, a boss 37 is formed on the dust cup bottom cover 30 corresponding to the secondary sewage outlet 42 . When the dust cup bottom cover 30 is in the first position, the boss 37 is suitable for abutting and connecting with the sealing ring 50 .

[0125] The multi-stage dust collecting device provided in this embodiment forms a closing portion 53 on the sealing ring 50, and the closing portion 53 is formed by shrinking at least a part of the area of ​​the sealing ring 50 toward the central axis in the radial direction, so that the closing portion 53 has a smaller inner diameter. When fitting with the boss 37, it can be tighter and is always in a compressed state through elastic fitting, thereby ensuring a sealing effect.

[0126] Preferably, a boss 37 is provided at the center of the dust cup bottom cover 30 .

[0127] The secondary drain outlet 42 is coaxially arranged with the boss 37 , and when the dust cup bottom cover 30 is in the first position state of blocking the secondary drain outlet 42 , the secondary drain outlet 42 and the boss 37 maintain a distance to avoid contact, and the two are conveniently sealed and connected by the sealing ring 50 .

[0128] Specifically, the boss 37 includes: a boss sealing surface 371, which is formed around the outer surface of the boss 37 and is suitable for being sleeved and connected with the closing portion 53 when the dust cup bottom cover 30 is in the first position.

[0129] Preferably, the boss sealing surface 371 has a certain slope, so that when the closing portion 53 is sleeved with the boss sealing surface 371, the closing portion 53 is gradually expanded and tightened, thereby achieving a good sealing effect.

[0130] Preferably, the top of the boss 37 is provided with a chamfer or a rounded corner to facilitate the guidance and installation of the sealing ring 50.

[0131] Specifically, the boss sealing surface 371 is interference fit with the closing portion 53 .

[0132] Specifically, when the dust cup bottom cover 30 is in the first position, the abutting portion 54 surrounds the boss 37 and abuts against the dust cup bottom cover 30 .

[0133] When the dust cup bottom cover 30 is closed, the closing portion 53 and the boss sealing surface 371 are in close contact and the closing portion is expanded, forming a relatively stable seal. This portion is the first sealing surface. The abutting portion 54 and the upper surface of the dust cup bottom cover 30 abut each other and remain in a compressed and contracted state. This portion is the second sealing surface. These two contact surfaces achieve a double seal between the sealing ring 50 and the secondary dust collection unit 40.

[0134] Example 3

[0135] This embodiment provides a vacuum cleaner, comprising: a vacuum cleaner body, and

[0136] A dust collecting device and / or a multi-stage dust collecting device as described above.

[0137] Preferably, the vacuum cleaner is further provided with a main unit 90, and the interior of the main unit 90 is suitable for placing a negative pressure vacuum motor.

[0138] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A multi-stage dust collecting device, characterized in that: include: Dust cup (10); a secondary dust collecting unit (40) at least partially nested inside the dust cup (10); The dust cup sewage outlet (14) and the secondary sewage outlet (42) are formed by respectively penetrating the dust cup (10) and the secondary dust collecting unit (40) in the same direction; A dust cup bottom cover (30) is opened and closed on the dust cup (10), and the dust cup bottom cover (30) includes a first position state for simultaneously blocking the dust cup sewage outlet (14) and the secondary sewage outlet (42), and a second position state for simultaneously opening the dust cup sewage outlet (14) and the secondary sewage outlet (42); and A sealing assembly is adapted to seal the interface between the dust cup bottom cover (30) and the dust cup sewage outlet (14) through at least two layers of sealing parts when the dust cup bottom cover (30) is in the first position state, and to seal the interface between the dust cup bottom cover (30) and the secondary sewage outlet (42) through at least two layers of sealing parts, the sealing assembly comprising: a sealing ring (50) constructed as an annular structure connected end to end, the sealing ring (50) being fixedly connected to the dust cup bottom cover (30) or the secondary dust collecting unit (40), and being in contact with the secondary dust collecting unit (40) or the dust cup bottom cover (30) through at least two layers of sealing parts when the dust cup bottom cover (30) is in the first position state, The sealing ring (50) further includes: a closing portion (53), formed by shrinking at least a portion of the sealing ring (50) toward the central axis along the radial direction; an abutting portion (54) formed by extending radially outward from one end of the sealing ring (50) away from the mounting rib (52); The sealing assembly comprises: a sealing ring (20) adapted to seal the interface between the dust cup bottom cover (30) and the dust cup discharge port (14) through at least two sealing portions; the sealing ring (20) forms an annular structure connected end to end and matches the shape of the inner edge of the dust cup discharge port (14). The sealing ring (20) comprises: an extension portion (22) formed by extending outwardly from the outer edge of the sealing ring (20) in a horizontal direction; and The skirt portion (21) extends outward from the upper edge of the sealing ring (20) and is arranged at an angle to the extension portion (22).

2. The multi-stage dust collecting device according to claim 1, characterized in that: The secondary dust collecting unit (40) comprises: a mounting groove (41) or a mounting rib (52), wherein the mounting groove (41) or the mounting rib (52) surrounds the outer edge or the inner edge of the secondary sewage outlet (42); The sealing ring (50) is formed with a mounting rib (52) or a mounting groove (41) corresponding to the mounting groove (41) or the mounting rib (52), and the mounting rib (52) is sleeve-connected to the mounting groove (41).

3. The multi-stage dust collecting device according to claim 2, characterized in that: A boss (37) is formed on the dust cup bottom cover (30) corresponding to the secondary sewage outlet (42); when the dust cup bottom cover (30) is in the first position, the boss (37) is suitable for abutting and connecting with the sealing ring (50).

4. The multi-stage dust collecting device according to claim 3, characterized in that: The boss (37) includes a boss sealing surface (371) formed around the outer surface of the boss (37) and suitable for being sleeve-connected with the closing portion (53) when the dust cup bottom cover (30) is in the first position.

5. The multi-stage dust collecting device according to claim 4, characterized in that: The boss sealing surface (371) is interference-fitted with the closing portion (53).

6. The multi-stage dust collecting device according to claim 3, characterized in that: When the dust cup bottom cover (30) is in the first position, the abutment portion (54) surrounds the boss (37) and is abutted and connected with the dust cup bottom cover (30).

7. The multi-stage dust collecting device according to claim 1, characterized in that: A dust cup convex edge (12) is provided on the inner edge of the dust cup discharge port (14), and the dust cup convex edge (12) protrudes relative to the inner surface of the dust cup (10) and surrounds the dust cup discharge port (14). When the dust cup bottom cover (30) is in the first position, the dust cup convex edge (12) is suitable for at least partially fitting with the sealing ring (20).

8. The multi-stage dust collecting device according to claim 7, characterized in that: The dust cup convex edge (12) includes: a sealing protrusion (121) formed on the side of the dust cup convex edge (12) and suitable for abutting against the skirt edge (21) when the dust cup bottom cover (30) is in the first position.

9. The multi-stage dust collecting device according to claim 7, characterized in that: The dust cup rim (12) further includes: a sealing pressing portion (122) formed on the bottom surface of the dust cup rim (12), and adapted to press the extension portion (22) between the dust cup rim (12) and the dust cup bottom cover (30) by the sealing pressing portion (122) when the dust cup bottom cover (30) is in the first position.

10. A vacuum cleaner, characterized in that: Including the vacuum cleaner body, and A dust collecting device as described in any one of claims 1 to 9.

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