Filter device and dust collection equipment

Abstract

The present invention relates to a filtering device and a dust collecting device, which belongs to the technical field of household appliances, and is used to solve the problem of the long overall length of the existing dust collecting devices. The filtering device of the present invention comprises: a first filtering component, which is prepared to perform primary filtration on the fluid entering the filtering device; a second filtering component, which is located downstream of the first filtering component, is prepared to perform secondary filtration on the fluid filtered by the first filtering component; wherein the second filtering component comprises a cyclone cone and a motor assembly cavity; the motor assembly cavity is prepared to assemble a motor; the cyclone cone is provided with a plurality of cyclone cones, and the cyclone cones are arranged around the outside of the motor assembly cavity, so as to perform cyclone filtration on the fluid entering the second filtering component. The filtering device of the present invention is provided with a motor assembly cavity for assembling a motor, which can effectively reduce the length of the dust collecting device to improve the user experience of the dust collecting device.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a filtering device and a dust collecting device. Background Art

[0002] At present, in the existing vacuum cleaners, the motor assembly is located behind the filter device, which results in a longer overall length of the vacuum cleaner, which is not conducive to user operation and reduces the user experience of the vacuum cleaner. Summary of the invention

[0003] In view of the above analysis, the embodiments of the present invention aim to provide a filtering device and a dust collecting device to solve the problem that the existing dust collecting devices are of a relatively long overall length.

[0004] In one aspect, the present invention provides a filtering device, comprising:

[0005] A first filter assembly for performing primary filtration on the fluid entering the filter device;

[0006] A second filter assembly is located downstream of the first filter assembly to perform secondary filtration on the fluid filtered by the first filter assembly;

[0007] Wherein, the second filter assembly includes a cyclone cone and a motor assembly chamber;

[0008] The motor assembly cavity is used to assemble the motor;

[0009] The cyclone cones are provided in plurality and are arranged around the outside of the motor assembly cavity to perform cyclone filtering on the fluid entering the second filter assembly.

[0010] Furthermore, the first filter assembly is provided with a central dust collecting space for storing dust filtered out by the second filter assembly at the second stage;

[0011] The second filter assembly further includes a dust guide member, which is respectively connected to the central dust collecting space and the cyclone cone so as to guide the dust filtered by the cyclone cone into the central dust collecting space.

[0012] Furthermore, the first filter assembly includes a fluid pipeline, a filter portion, a flow guide portion and a dust collecting ring wall;

[0013] The fluid conduit is provided with a fluid inlet and a fluid outlet, and at least a portion of the fluid conduit is enclosed within the side wall of the first filter assembly;

[0014] The filter portion is disposed around the outside of the fluid pipeline, and the filter portion constitutes a part of the side wall of the first filter assembly;

[0015] One end of the guide portion is connected to the fluid outlet, and the other end of the guide portion faces the filter portion, so as to guide the fluid in the fluid pipeline to the filter portion;

[0016] The dust collecting ring wall is located between the fluid pipeline and the side wall of the first filter assembly, the bottom end of the dust collecting ring wall is connected to the bottom plate of the first filter assembly, and a gap is provided between the dust collecting ring wall and the fluid pipeline and the side wall of the first filter assembly;

[0017] The central dust collecting space is enclosed between the dust collecting ring wall, the fluid pipeline and the bottom plate of the first filter assembly;

[0018] A circulation space is enclosed between the dust collecting ring wall, the bottom plate of the first filter assembly, and the first filter assembly to allow the fluid after primary filtration to circulate.

[0019] Further, the guide portion spirally extends from the fluid outlet to the filter portion.

[0020] Furthermore, the flow guide portion includes a transverse plate and a spiral plate, the transverse plate is located above the fluid outlet, the spiral plate is connected to the transverse plate, and the spiral direction of the spiral plate faces the filter portion.

[0021] Furthermore, the guide portion also includes a baffle, one end of the baffle is vertically connected to the transverse plate, the other end of the baffle is connected to the spiral plate, and the inner side of the baffle is connected to the side wall of the first filter assembly.

[0022] Furthermore, the dust guide is located below the motor assembly cavity and the cyclone cone;

[0023] The bottom of the dust guide member is butted against the top of the side wall of the first filter assembly.

[0024] Furthermore, an air guide port and a dust collection port are provided at the bottom of the dust guide member, the air guide port is connected to the circulation space, and the dust collection port is connected to the central dust collecting space.

[0025] Furthermore, the dust guide member includes a conical ring wall and a bottom cover, the bottom cover is connected to the bottom of the conical ring wall, and the bottom cover is provided with the air guide port and the dust collection port.

[0026] Furthermore, the bottom cover includes a cover plate portion, and the cover plate portion is arranged to cover the top end of the fluid pipeline;

[0027] The shape of the bottom end of the conical ring wall matches the shape of the top of the dust collecting ring wall, a part of the bottom end of the conical ring wall is connected to the upper end surface of the cover plate portion, and the rest of the bottom end of the conical ring wall is in contact with the dust collecting ring wall;

[0028] The bottom end of the conical ring wall and the cover plate portion surround the dust collecting port;

[0029] The air guide port is located outside the conical ring wall.

[0030] Furthermore, a plurality of support bars are provided in the air guide port, one end of the support bar is connected to the conical ring wall, and the other end of the support bar is connected to the side wall of the bottom cover;

[0031] A support plate is provided between the top end surface of the bottom cover and the conical annular wall.

[0032] Furthermore, the conical annular wall gradually inclines outwards from bottom to top.

[0033] Furthermore, the outer edge of the top end of the conical annular wall is arranged around the outside of the cyclone cone and the bottom of the motor assembly cavity.

[0034] Furthermore, the cyclone cone is provided with an air inlet, an air outlet and a dust guide port;

[0035] The dust guide port is located at the lowest point of the cyclone cone, and the conical annular wall is arranged around the outside of the dust guide port;

[0036] The air inlet is opened on the side wall of the cyclone cone;

[0037] The air outlet is opened at the top of the cyclone cone.

[0038] Furthermore, a connecting plate is provided between two adjacent cyclone cones, and the connecting plate extends from the top end of the cyclone cone side wall to the bottom end of the cyclone cone side wall;

[0039] The air inlet is located on the outer side of the connecting plate;

[0040] The top of the conical ring wall is sealed and connected with the connecting plate and the bottom of the cyclone cone, and the conical ring wall is arranged around the outer side of the dust guide port.

[0041] Furthermore, the second filter assembly further comprises a cover body, which is arranged on the top of the motor assembly cavity, the cyclone cone and the connecting plate;

[0042] The cover body is provided with an air guide area, an air inlet area and an air outlet area. The air outlet area is arranged outside the air inlet area, and the air guide area is arranged outside the air outlet area. The air guide area corresponds to the cyclone cone and the connecting plate, and the air inlet area and the air outlet area correspond to the motor assembly cavity.

[0043] Furthermore, the air guide area is provided with an air guide port, the air guide port corresponds to the cyclone cone one by one, and the air guide port is connected to the air outlet;

[0044] The air inlet area is provided with an air inlet communicated with the motor assembly cavity;

[0045] The air outlet area is provided with an air outlet communicated with the motor assembly cavity.

[0046] Furthermore, a partition is provided at the top end of the side wall of the first filter assembly. The partition is arranged around the outer side of the side wall of the first filter assembly, and the partition is located above the guide portion.

[0047] On the other hand, the present invention provides a dust collection device, comprising the above-mentioned filtering device.

[0048] Furthermore, the dust collection device further comprises a dust collecting cup, and the filter device is detachably mounted in the dust collecting cup;

[0049] The partition of the first filter assembly and the cover of the second filter assembly are in sealing contact with the side wall of the dust cup.

[0050] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0051] (1) The filter device is provided with a motor assembly cavity for assembling the motor, which can effectively reduce the length of the vacuum cleaner and improve the user experience of the vacuum cleaner;

[0052] (2) The cyclone cone arranged outside the motor assembly cavity can effectively reduce the noise and vibration generated by the high-speed rotation of the motor, and has a good noise reduction and vibration reduction effect;

[0053] (3) The filter device includes a first filter assembly and a second filter assembly, which filters the dust-containing fluid entering the filter assembly twice to achieve graded filtration, so that the filter device has a good filtering effect;

[0054] (4) The guide portion of the first filter assembly spirally extends from the fluid outlet to the filter portion to guide the fluid cyclone in the fluid pipeline to the filter portion. On the one hand, the guide portion guides the fluid entering the first filter assembly to quickly guide the fluid to the filter portion; on the other hand, the guide portion causes the fluid to form a cyclone outside the first filter assembly, so that larger dust particles in the fluid are separated under the action of centrifugation, thereby reducing the filtering pressure of the filter portion and enabling the filter portion to have a better filtering effect.

[0055] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0057] Figure 1It is a structural schematic diagram of a filtering device in a specific implementation manner;

[0058] Figure 2 An exploded view of a filter device in a specific embodiment;

[0059] Figure 3 is a cross-sectional view of a filter device in a specific embodiment;

[0060] Figure 4 It is a structural schematic diagram of the first filter component in a specific implementation manner;

[0061] Figure 5 It is a structural schematic diagram of the first filter component from another angle in a specific implementation manner;

[0062] Figure 6 It is a schematic diagram of the combined structure of the first filter assembly and the dust guide member in a specific implementation manner;

[0063] Figure 7 It is a structural schematic diagram of the combination of the first filter assembly and the dust guide member from another angle in a specific implementation manner;

[0064] Figure 8 Schematic diagram of the structure of the dust guide member in a specific implementation manner (I);

[0065] Fig. 9 It is a structural schematic diagram of the dust guide member in a specific implementation manner (II);

[0066] Fig.10 Schematic diagram of the structure of the dust guide member in a specific implementation manner (III);

[0067] Fig.11 Schematic diagram of the structure of the dust guide member in a specific implementation manner (IV);

[0068] Fig.12 It is a structural schematic diagram of the second filter component in a specific implementation manner;

[0069] Fig.13 It is a structural schematic diagram of the second filter assembly from another angle in a specific implementation manner;

[0070] Fig.14 is a cross-sectional view of a second filter assembly in a specific embodiment;

[0071] Fig.15 This is a schematic diagram of the structure of the second filter assembly after the dust guide piece is removed in a specific implementation manner;

[0072] Fig.16 This is a schematic diagram of the structure of the second filter assembly after the cover body is removed in a specific implementation manner;

[0073] Fig.17 It is a structural schematic diagram of the cover body in a specific implementation manner;

[0074] Fig.18 It is a structural schematic diagram of the cover body at another angle in a specific implementation manner;

[0075] Fig.19 It is a structural schematic diagram of the dust collecting device in a specific implementation manner;

[0076] Fig. 20 It is a schematic diagram of the combined structure of the filter device and the dust cup in a specific implementation manner;

[0077] Fig.21 It is a structural schematic diagram of the combination of the filter device and the dust cup in another angle in a specific implementation manner;

[0078] Fig. 22 It is a cross-sectional view of the combination of the filter device and the dust cup in a specific implementation manner.

[0079] Reference numerals:

[0080] 1-first filter assembly; 101-fluid inlet; 102-fluid outlet; 11-fluid pipeline; 111-direct current pipe; 112-cyclone pipe; 112a-central part; 112b-arc-shaped part; 12-filter part; 121-dust shield; 13-flow guide; 131-transverse plate; 132-spiral plate; 133-baffle; 14-bottom plate; 15-dust collecting ring wall; 16-partition plate; 17-rib plate; 2-second filter assembly; 201-air guide port; 202-dust collecting port; 203-air inlet; 204-air outlet; 205-dust guide port ;206-air guide port;207-air inlet;208-air outlet;21-motor assembly chamber;22-cyclone cone;221-cyclone part;222-cone part;23-dust guide piece;231-conical ring wall;232-bottom cover;232a-cover plate part;232b-support bar;232c-support plate;24-connecting plate;25-cover body;251-air guide area;252-air inlet area;253-air outlet area;254-air guide duct;26-guide part;261-lower plate;262-side plate;3-dust cup;301-dust suction port. DETAILED DESCRIPTION

[0081] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0082] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral connection, which can be a mechanical connection, or an electrical connection, which can be a direct connection, or can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] The terms "top", "bottom", "above", "lower", and "on" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is understood that devices are multifunctional regardless of their orientation in space.

[0084] The common working surface of the present invention can be a plane or a curved surface, can be inclined, or can be horizontal. For the convenience of description, the embodiment of the present invention is placed on a horizontal plane and used on the horizontal plane, and "high and low" and "up and down" are defined in this way.

[0085] Embodiment 1

[0086] This embodiment provides a filtering device, such as Figures 1 to 18 As shown, including:

[0087] The first filter assembly 1 is used to perform primary filtration on the fluid entering the filter device;

[0088] The second filter assembly 2 is located downstream of the first filter assembly 1 to perform secondary filtration on the fluid filtered by the first filter assembly 1;

[0089] The second filter assembly 2 includes a cyclone cone 22 and a motor assembly chamber 21;

[0090] The motor assembly cavity 21 is used to assemble the motor;

[0091] There are a plurality of cyclone cones 22 , which are disposed around the outside of the motor assembly cavity 21 to perform cyclone filtering on the fluid entering the second filter assembly 2 .

[0092] Compared with the prior art, the filtering device of the present invention, firstly, is provided with a motor assembly cavity 22 for assembling a motor, which can effectively reduce the length of equipment (such as dust collection equipment) equipped with the filtering device, so as to improve the user experience of these equipment; secondly, the cyclone cone arranged around the outside of the motor assembly cavity 22 can effectively reduce the noise and vibration generated by the high-speed rotation of the motor, and has a good noise reduction and vibration reduction effect; finally, it is provided with a first filter component 1 and a second filter component 2, which filter the dust-containing fluid entering it twice, that is, the first filter component 1 performs a primary filtration on the dust-containing fluid and the second filter component 2 performs a secondary filtration (i.e., cyclone filtration) on the dust-containing fluid (fluid after the primary filtration), thereby realizing graded filtration, so that the filtering device has a good filtering effect.

[0093] The first filter assembly 1 includes a fluid pipeline 11 , a filter portion 12 and a flow guide portion 13 .

[0094] The fluid pipeline 11 is provided with a fluid inlet 101 and a fluid outlet 102 , and the dust-laden fluid enters the first filter assembly 1 (filter device) through the fluid inlet 101 .

[0095] The filter part 12 is used to filter the fluid entering the first filter assembly 1. Specifically, the filter part 12 is disposed outside the fluid pipeline 11, and the filter part 12 constitutes a part of the side wall of the first filter assembly 1.

[0096] At least a portion of the fluid conduit 11 is enclosed within the side wall of the first filter assembly 1 , and a gap is reserved between the side wall of the fluid conduit 11 and the side wall of the first filter assembly 1 for the fluid to flow through the gap after being filtered by the filter unit 12 .

[0097] One end of the flow guide 13 is connected to the fluid outlet 102, and the other end of the flow guide 13 faces the filter 12, so as to guide the fluid in the fluid pipeline 11 to the filter 12. Specifically, the fluid outlet 102 is provided on the side wall of the first filter assembly 1, and the flow guide 13 is located on the outer side surface of the side wall of the first filter assembly 1 (the side away from the central axis of the first filter assembly 1).

[0098] Furthermore, the guide portion 13 spirally extends from the fluid outlet 102 to the filter portion 12 to guide the fluid cyclone in the fluid pipe 11 to the filter portion 12. On the one hand, the guide portion 13 guides the fluid entering the first filter component 1 to quickly guide the fluid to the filter portion 12; on the other hand, the guide portion 13 causes the fluid to form a cyclone outside the first filter component 1, so that larger dust particles in the fluid are separated under the action of centrifugation, thereby reducing the filtering pressure of the filter portion 12 and enabling the filter portion 12 to have a better filtering effect.

[0099] To ensure the filtering effect of the filter part 12 , the fluid outlet 102 and the guide part 13 are located above the filter part 12 , so that the entire filter part 12 can filter the fluid as much as possible and give full play to the filtering effect of the filter part 12 .

[0100] Specifically, the guide part 13 includes a transverse plate 131 and a spiral plate 132. The transverse plate 131 is located above the fluid outlet 102. The spiral plate 132 is connected to the transverse plate 131, and the spiral direction of the spiral plate 132 is toward the filter part 12 to guide the fluid spiral to the filter part 12 for primary filtration and dust removal.

[0101] In this embodiment, the spiral plate 132 includes a connecting end and an extending end. The connecting end is connected to the transverse plate 131 . The connecting end spirally extends downward to the extending end. The extending end is located below the fluid outlet 102 and above the filter portion 12 .

[0102] It should be noted that the transverse plate 131 and the spiral plate 132 are vertically connected to the side wall of the first filter assembly 1 to guide the fluid to the filter portion 12 faster and better.

[0103] The downward projection of the transverse plate 131 can completely cover the fluid outlet 102, that is, the length of the transverse plate 131 is greater than the length of the fluid outlet 102 (the length of the fluid outlet 102 refers to the longest distance between the left and right ends of the fluid outlet 102), so as to ensure that the fluid discharged from the fluid outlet 102 can be guided through the transverse plate 131. In addition, it can also prevent the guide part 13 from blocking the fluid outlet 102 and affecting the speed of the fluid being discharged outward.

[0104] In this embodiment, the horizontal plate 131 is arranged along the upper edge of the fluid outlet 102, and the lower end surface of the horizontal plate 131 is flush with the upper end surface of the fluid outlet 102 to ensure smooth discharge of the fluid from the fluid outlet 102. The extended end of the spiral plate 132 is connected to the lower edge of the fluid outlet 102, and specifically, the lower end surface of the extended end is flush with the lower end surface of the fluid outlet 102.

[0105] In order to better make the fluid flowing out of the fluid outlet 102 flow to the filter 12 along the guide part 13, the guide part 13 also includes a baffle 133, which is located at one end of the fluid outlet 102 connected to the extended end of the spiral plate 132, and the baffle 133 is simultaneously connected to the transverse plate 131, the spiral plate 132 and the side wall of the first filter assembly 1. Specifically, the upper end of the baffle 133 is vertically connected to the lower end surface of the transverse plate 131, the lower end of the baffle 133 is vertically connected to the upper end surface of the spiral plate 132, and the inner end surface of the baffle 133 is vertically connected to one end of the fluid outlet 102 close to the extended end of the spiral plate 132, so that the fluid can only be guided to the filter 12 along the transverse plate 131 and the spiral plate 132 after being guided out from the fluid outlet 102, thereby accelerating the speed of the fluid guiding the filter 12, thereby improving the filtering speed of the filter 12, and at the same time preventing the fluid from being reversely guided from the other end, resulting in turbulence of the fluid, and affecting the filtering effect and filtering speed of the first filter assembly 1.

[0106] In order to guide the fluid to the filter 12 as quickly as possible, the spiral angle α of the guide 13 is less than 360°. At the same time, in order to ensure that the fluid can form a cyclone in the guide 13, 180°≤α, so 180°≤α<360°. In this embodiment, α refers to the spiral angle between the connecting end and the extending end of the spiral plate 132.

[0107] In order to ensure that the fluid is better guided at the guide part 13 and forms a cyclone, the fluid pipeline 11 includes a direct current pipe 111 and a cyclone pipe 112. A fluid inlet 101 is provided at one end of the direct current pipe 111, and the other end of the direct current pipe 111 is sealed and connected to the cyclone pipe 112, so that all the fluid entering the direct current pipe 111 is introduced into the cyclone tube 112.

[0108] The cyclone tube 112 includes a central portion 112a and an arc portion 112b, the bottom of the central portion 112a is connected to the direct current tube 111, the side wall of the central portion 112a is provided with an opening, one end of the arc portion 112b is connected to the central portion 112a through the opening, and the other end of the arc portion 112b is provided with a fluid outlet 102, that is, one end of the arc portion 112b is connected to the central portion 112a, and the other end is connected to the side wall of the first filter assembly 1, and an opening is provided at the connection with the central portion 112a, and a fluid outlet 102 is provided at the connection with the first filter assembly 1. In this embodiment, the opening on the side wall of the central portion 112a extends from the top end of the side wall to the bottom end.

[0109] An arc-shaped channel is provided in the arc-shaped portion 112 b so that the fluid can flow therethrough to form a cyclone, so that the fluid can be better guided along the guide portion 13 after being discharged to the fluid outlet 102 .

[0110] It should be noted that the arc of the arc portion 112b faces the guide portion 13, that is, the arc direction of the arc channel of the arc portion 112b is consistent with the spiral direction of the spiral plate 132, so that the fluid can be guided from the guide portion 13 to the filter portion 12 more quickly, and at the same time, the fluid can more easily form a cyclone.

[0111] Furthermore, the side wall of the center portion 112a transitions in an arc shape to the outer wall of the arc portion 112b (the side wall away from the central axis of the center portion 112a), and the inner wall of the arc portion 112b (the side wall close to the central axis of the center portion 112a) transitions in an arc shape to the side wall of the first filter component 1, so that the opening of the fluid outlet 102 is as large as possible so that the fluid can be guided to the guide portion 13 more quickly. In addition, the two arc transitions make the fluid guidance smoother and it is easier to form a cyclone.

[0112] It should be noted that the bottom wall of the arc-shaped portion 112b is sealed to the side wall of the center portion 112a, and the inner and outer side walls of the arc-shaped portion 112b are respectively sealed to the side wall of the center portion 112a to ensure that the fluid in the center portion 112a can all enter the arc-shaped channel of the arc-shaped portion 112b. In this embodiment, the lower end surface of the bottom wall of the arc-shaped portion 112b is flush with the bottom end surface of the side wall of the center portion 112a, and the opening extends from the top of the side wall of the center portion 112a to the bottom to ensure that the fluid in the center portion 112a quickly and smoothly enters the arc-shaped portion 112b.

[0113] After the dust-containing fluid enters the first filter assembly 1 from the fluid inlet 101, it is guided by the direct current pipe 111, the central part 112a and the arc-shaped part 112b of the cyclone pipe 112, and then is guided to the guide part 13 of the cyclone from the fluid outlet 102. After being guided by the cross plate 131 and the spiral plate 132 of the guide part 13, the cyclone guide filter part 12 performs primary filtration.

[0114] In this embodiment, the direct current pipe 111 is a cylindrical pipe, the upper end of which is located inside the side wall of the first filter assembly 1, and the lower end is located below the side wall of the first filter assembly 1, and the fluid inlet 101 is opened at the lower end of the direct current pipe 111, and the upper end of the direct current pipe 111 is sealed and connected to the central part 112a of the cyclone pipe 112. The central axis of the direct current pipe 111 is collinear with the central axis of the first filter assembly 1.

[0115] In this embodiment, the cyclone tube 112 is surrounded by the side wall of the first filter assembly 1, the central portion 112a of the cyclone tube 112 is cylindrical, the diameter of the central portion 112a is the same as the diameter of the direct current tube 111, and the side walls of the two are flush inside and outside, and the central axis of the central portion 112a is colinear with the central axis of the first filter assembly 1. The outer side wall of the arc portion 112b transitions with the side wall of the central portion 112a in an arc shape, and the inner side wall of the arc portion 112b transitions with the side wall of the first filter assembly 1 in an arc shape.

[0116] The first filter assembly 1 also includes a bottom plate 14, which is covered at the bottom end of the side wall of the first filter assembly 1, and a through hole for the fluid pipeline 11 to pass through is opened in the center of the bottom plate 14. Specifically, the bottom plate 14 is detachably and sealedly connected to the side wall of the first filter assembly 1, and the bottom plate 14 is sealedly connected to the side wall of the fluid conduit 11.

[0117] In this embodiment, the direct current pipe 111 passes through the through hole of the bottom plate 14 and is connected to the cyclone pipe 112. The side wall of the direct current pipe 111 is sealed and connected to the bottom plate 14. A portion of the direct current pipe 111 is located above the bottom plate 14, and a portion of the direct current pipe 111 is located above the bottom plate 14. The fluid inlet 101 is located below the bottom plate 14.

[0118] In this embodiment, the bottom end of the filter part 12 is detachably sealed and connected to the bottom plate 14 , and the filter part 12 constitutes the lower side wall of the first filter component 1 . The fluid filtered by the filter part 12 enters the gap between the side wall of the first filter component 1 and the fluid pipeline 11 .

[0119] The above-mentioned first filter component 1 also includes a dust collecting ring wall 15, which is located between the fluid pipeline 11 and the side wall of the first filter component 1, that is, the dust collecting ring wall 15 is arranged on the outside of the direct current tube 111 and the center part 112, and the side wall of the first filter component 1 is arranged on the outside of the dust collecting ring wall 15, and there are gaps reserved between the dust collecting ring wall 15 and the fluid pipeline 11 and the side wall of the first filter component 1.

[0120] The bottom end of the dust collecting annular wall 15 is detachably sealed to the bottom plate 14 , and the top end of the dust collecting annular wall 15 is flush with the top end surface of the side wall of the first filter assembly 1 .

[0121] It should be noted that the dust collecting annular wall 15 is provided with a slot for the arc-shaped portion 112b of the cyclone tube 112 to pass through, and the integrated annular wall 15 is sealedly connected to the side wall and bottom wall of the arc-shaped portion 112b.

[0122] A central dust collecting space is formed between the bottom plate 14, the dust collecting annular wall 15 and the side wall of the fluid pipe 11, and the dust filtered by the second filter assembly 2 is collected in the central dust collecting space. The bottom of the second filter assembly 2 is butted against the top of the dust collecting annular wall 15 to guide the dust filtered by the second filter assembly 2 into the central dust collecting space.

[0123] A space (called a circulation space) is formed between the bottom plate 14 , the dust collecting ring wall 15 and the side wall of the first filter assembly 1 for the fluid to flow after being filtered by the filter unit 12 , that is, the fluid after the first level of filtration by the filter unit 12 enters the circulation space and is then discharged from the top of the first filter assembly 1 .

[0124] In order to ensure that the dust filtered out by the first filter component 1 is no longer directed to the filter part 12, a dust shield 121 is provided at the bottom end of the filter part 12. The dust shield 121 is arranged around the bottom end of the filter part 12, and the shape of the dust shield 121 is trumpet-shaped, extending outward and downward from the top end of the dust shield 121 to the bottom end, that is, the opening direction of the dust shield 121 is toward the direction away from the filter part 12, so as to prevent the dust filtered out by the first filter component 1 from being directed to the filter part 12 again.

[0125] In order to allow the dust filtered out of the first stage to have an independent dust storage space in the dust cup, a partition 16 is provided at the top of the side wall of the first filter assembly 1. The partition 16 is arranged around the outside of the side wall of the first filter assembly 1, and the partition 16 is located above the guide portion 13. When the filter device is installed in the dust cup, the fluid inlet 101 of the fluid pipeline is sealed and connected with the dust suction port of the integrated cup, and the partition 16 is in sealing contact with the side wall of the dust cup, and an independent dust storage space is formed between the bottom of the dust cup, the side wall of the dust cup, the side wall of the first filter assembly 1, the side wall of the fluid pipeline 1 and the partition 16, and the dust filtered out by the filter portion 12 is located in the dust storage space.

[0126] From the above, it can be seen that the dust filtered out by the first filter component 1 is stored in the above-mentioned dust storage space, while the dust filtered out by the second filter component 2 is stored in the above-mentioned central dust collecting space. The two spaces are divided by the dust collecting ring wall 15 and the bottom plate 14, and are independent of each other, so that dust of different levels can be stored in partitions, which is convenient for users to clean.

[0127] In this embodiment, the partition 16 is shaped like a trumpet, extending outward and upward from the bottom end of the partition 16 to the top end, that is, the opening of the partition 16 faces the second filter component 2, so as to guide the fluid after the first-stage filtration, so that the fluid is guided to the second filter component 2 as soon as possible.

[0128] In order to make the fluid conduit 11 and the dust collecting ring wall 15 more stable in the side wall of the first filter assembly 1, a plurality of ribs 17 are provided between the side wall of the fluid conduit 11, the dust collecting ring wall 15 and the side wall of the first filter assembly 1. In this embodiment, the ribs 17 connected to the fluid conduit 11 are located at the side wall of the center portion 112a of the cyclone tube 112.

[0129] It should be noted that the number and size of the ribs 17 should not affect the first-stage filtered fluid being directed to the second filter assembly 2, and should not affect the dust filtered out of the second stage of the second filter assembly 2 being directed to the central dust collecting space.

[0130] In this embodiment, the side wall of the first filter component 1 except the filter portion 12 is called the upper side wall portion, the guide portion 13 is located on the upper side wall portion, the fluid outlet 102 is opened on the upper side wall portion, and the ribs 17 do not exceed the upper and lower ends of the upper side wall portion. The length of the center portion 112a is the same as the length of the upper side wall portion. In order to facilitate processing and assembly and the stability of the first filter component 1, the upper side wall portion, the guide portion 13, the cyclone tube 112, the dust collecting ring wall 15, the partition 16, and the ribs 17 are integrally formed.

[0131] In this embodiment, the top of the filter part 12 is sealed and connected to the bottom of the upper side wall, and the bottom of the filter part 12 is detachably sealed and connected to the bottom plate 14. Specifically, the filter part 12 is a filter screen, the top of the filter screen is sealed and connected to the bottom of the upper side wall, and the bottom of the filter screen is detachably sealed and connected to the bottom plate.

[0132] In this embodiment, the bottom end of the dust collecting ring wall 15 is detachably sealed to the bottom plate 14, thereby ensuring that dust in the central dust collecting space will not leak out from the bottom plate 14 and facilitating the cleaning of dust in the central dust collecting space.

[0133] The second filter assembly 2 further comprises a dust guide 23 for guiding the dust filtered out by the cyclone cone 22 in the secondary stage into the central dust collecting space surrounded by the dust collecting annular wall 15 .

[0134] The dust guide member 23 is located below the motor assembly cavity 21 and the cyclone cone 22. The bottom of the dust guide member 23 is connected to the top of the side wall of the first filter component 1. An air guide port 201 and a dust collection port 202 are provided at the bottom of the dust guide member 23. The fluid after the first-level filtration of the first filter component 1 is discharged from the air guide port 201, and the dust after the second-level filtration of the cyclone cone 22 is introduced into the central dust collecting space through the dust collection port 202.

[0135] Specifically, the dust guide member 23 includes a conical ring wall 231 and a bottom cover 232 . The bottom cover 232 is connected to the bottom of the conical ring wall 231 . The air guide port 201 and the dust collection port 202 are provided on the bottom cover 232 .

[0136] The bottom cover 232 further includes a cover plate portion 232a, which can be covered on the top of the fluid pipeline 11, so that all the fluid entering the fluid pipeline 1 is discharged from the fluid outlet 102 on the side wall of the first filter assembly 1, and the shape of the cover plate portion 232a is adapted to the top of the fluid pipeline 11 to ensure that the top of the fluid pipeline 11 is closed. In this embodiment, the cover plate portion 232a is covered on the top of the cyclone tube 112, and the shape of the cover plate portion 232a is adapted to the shape of the top of the cyclone tube 112.

[0137] A portion of the bottom end of the conical ring wall 231 is connected to the upper end surface of the cover plate portion 232a, and the other portion and the cover plate portion 232a surround a dust collection port 202, which is connected to the central dust collection space. At the same time, the shape of the bottom end of the conical ring wall 231 is adapted to the top shape of the dust collection ring wall 15, and the rest of the bottom end of the conical ring wall 231, except for the portion connected to the cover plate portion 232a, is connected to the dust collection ring wall 15 to ensure that all the dust after secondary filtration guided by the conical ring wall 231 is stored in the central dust collection space.

[0138] The air guide port 201 is located outside the conical ring wall 231 , and is connected to the above-mentioned circulation space (i.e., the space enclosed by the dust collecting ring wall 15 , the side wall of the first filter assembly 1 , and the bottom plate 14 ), and all the fluid after the first-stage filtration is discharged from the air guide port 201 .

[0139] In this embodiment, the shape of the bottom end of the side wall of the bottom cover 232 is adapted to the shape of the top end of the side wall of the first filter assembly 1 , and the bottom end of the side wall of the bottom cover 232 is butted against the top end of the side wall of the first filter assembly 1 .

[0140] The outer side wall of the cover plate portion 232 a constitutes a part of the side wall of the bottom cover 232 , and the side wall of the bottom cover 232 excluding the cover plate portion 232 a and the conical annular wall 231 surround the above-mentioned air guide port 201 .

[0141] In order to improve the structural stability of the bottom cover 232, a plurality of support bars 232b are provided in the air guide port 201, one end of the support bar 232b is connected to the conical ring wall 231, and the other end is connected to the side wall of the bottom cover 232. Furthermore, a support plate 232c is provided between the top end surface of the bottom cover 232 and the conical ring wall 231, and the support plate 232c plays a triangular support role between the bottom cover 232 and the conical ring wall 231, so as to improve the overall stability of the dust guide 23.

[0142] It should be noted that the number and size of the support bars 232 b and the support plates 232 c must ensure that they do not affect the flow of the fluid at the air guide port 201 .

[0143] The conical annular wall 231 extends upward and outward from the bottom end to the top end, that is, it tilts downward and inward from the top end to the bottom end, so that the dust filtered out of the secondary stage falls into the central dust collecting space more quickly under the guidance of the conical annular wall 231.

[0144] In this embodiment, the shape of the conical annular wall 231 is trumpet-shaped, and the opening of the conical annular wall 231 faces the direction where the motor assembly cavity 21 and the cyclone cone 22 are located.

[0145] The outer edge of the top of the conical ring wall 231 surrounds the outside of the bottom of the cyclone cone 22 and the motor assembly chamber 21, and the conical ring wall 231, the bottom of the cyclone cone 22, and the bottom of the motor assembly chamber 21 surround a dust guide space for guiding the dust after secondary filtration. Specifically, the top of the conical ring wall 231 is connected to the bottom of the cyclone cone 22.

[0146] The above-mentioned cyclone cone 22 is provided with an air inlet 203, an air outlet 204 and a dust guide port 205. The fluid after primary filtration is discharged from the air guide port 201 and enters the cyclone cone 22 through the air inlet 203. After the cyclone filtration (i.e., secondary filtration) of the cyclone cone 22, the fluid after secondary filtration is discharged from the air outlet 204 to the outside of the cyclone cone 22, and the dust filtered out of the secondary filtration is introduced into the central dust collecting space through the dust guide port 205 and the dust guide part 23.

[0147] The cyclone cone 22 includes a cyclone portion 221 and a cone portion 222. A cyclone cavity is provided in the cyclone portion 221, and a conical cavity is provided in the cone portion 222. The cyclone cavity and the conical cavity are connected, and the conical cavity is inverted (inverted means that the apex of the cone is located directly below the bottom surface of the cone, and the apex and bottom surface are the apex and bottom surface of the cone in the geometric sense) and is located below the cyclone cavity. The cyclone cavity causes the fluid entering it to form a cyclone, and the conical cavity is used to guide the filtered dust out of the cyclone cone 22 more quickly. Specifically, the side wall of the cyclone cavity is an arc-shaped side wall that can cause the fluid to form a cyclone.

[0148] The air inlet 203 and the air outlet 204 are disposed on the cyclone portion 221 and are connected to the cyclone chamber.

[0149] The dust guide port 205 is provided at the bottom end of the cone portion 222 , and the dust guide port 205 is communicated with the cone-shaped cavity, that is, the dust guide port 205 is located at the apex of the cone-shaped cavity.

[0150] It should be noted that the dust guide port 205 is located at the lowest point of the cyclone cone 22, and the top of the conical ring wall 231 is arranged around the outside of all the dust guide ports 205 to ensure that all the dust filtered out of the secondary filter can be guided out of the cyclone cone 22 through the dust guide port 205, and then stored in the central dust collecting space under the guidance of the dust guide member 23.

[0151] The dust-containing fluid enters the cyclone portion 221 from the air inlet 203, and a cyclone is formed in the cyclone chamber. The dust in the fluid after the first-stage filtration falls into the conical cavity along the cavity wall of the cyclone cavity under the centrifugal action of the cyclone and the gravity of the dust. The dust after the second-stage filtration is guided by the cavity wall of the conical cavity and discharged out of the cyclone cone 22 through the dust guide port 205. The fluid after the second-stage filtration is discharged out of the cyclone cone 22 from the air outlet 204.

[0152] In order to ensure that the fluid does not interfere with each other when entering and exiting the cyclone cone 22 , and to enable the fluid to better form a cyclone in the cyclone cone 22 , the air inlet 203 is opened on the side wall of the cyclone part 221 , and the air outlet 204 is opened on the top of the cyclone part 221 .

[0153] In this embodiment, the cyclone portion 221 is cylindrical in shape, and a cylindrical cyclone cavity is formed around it. The central axis of the cyclone portion 221 (cyclone cavity) is parallel to the central axis of the second filter assembly. The cone portion 222 is conical in shape, and a conical conical cavity is formed around it. The top of the cone portion 222 is connected to and connected with the bottom of the cyclone portion 221 (i.e., there is no barrier between the cyclone cavity and the conical cavity). The bottom radius of the conical cavity is equal to the radius of the cyclone cavity, and the central axis of the cone portion 222 (conical cavity) is collinear with the cyclone portion 221. It should be noted that the cavity wall thickness of the cyclone portion 221 and the cone portion 222 is the same, so that the inner cavity wall and the outer wall of the cyclone cone 22 are smooth, thereby improving the filtering effect of the cyclone cone 22.

[0154] The cyclone portion 221 is tangent to the outer side surface of the side wall of the motor assembly cavity 21 to prevent the cyclone portion 221 from occupying the assembly space of the motor and affecting the assembly of the motor.

[0155] Each cyclone cone 22 has the same shape and the air inlet 203 thereon is opened at the same position, so that the cyclone direction and cyclone speed in the cyclone cone 22 are consistent, avoiding vibration of the second filter component and inconsistent filtering effect caused by different wind directions and wind speeds in each cyclone cone 22.

[0156] Since the air inlet 203 is provided on the side wall of the cyclone cone 22 , a certain distance is maintained between adjacent cyclone cones 22 , that is, the cyclone cones 22 are arranged alternately, that is, the cyclone cones 22 do not contact each other, so as to ensure smooth air intake through the air inlet 203 .

[0157] A connecting plate 24 is provided between two adjacent cyclone cones 22, and the connecting plate 24 extends from the top of the side wall of the cyclone cone 22 to the bottom of the side wall of the cyclone cone 22, and all the air inlets 203 are located outside the connecting plate 24, so as to prevent the setting of the connecting plate 24 from affecting the air intake of the air inlets 203. In this embodiment, the top end surface of the connecting plate 24 is flush with the top end surface of the cyclone cone 22, the bottom end surface of the connecting plate 24 is flush with the bottom end surface of the cyclone cone 22, the end surfaces on both sides of the connecting plate 24 are respectively connected to the side walls of different adjacent cyclone cones 22, and the outer wall surface of the connecting plate 24 is flush with the inner end surface of the air inlet 203.

[0158] It should be noted that the top of the conical annular wall 231 is sealed and connected to the connecting plate 24 and the bottom of the cyclone cone 22, and the conical annular wall 231 is arranged around the outside of the dust guide port 205 to prevent the dust after secondary filtration from leaking out, so that all the dust is stored in the central dust collecting space.

[0159] In this way, the connecting plate 24, the two adjacent cyclone cones 22 and the outer wall of the motor assembly chamber 21 enclose a cavity, which is called a partition cavity, so that the outer side of the motor assembly chamber 21 is completely wrapped by the partition cavity, the cyclone cone 22, and the conical ring wall 231, and the cyclone cone 22 is provided with a cyclone cavity and a conical cavity, so the motor assembly chamber 21 is surrounded by the partition cavity, the cyclone cavity, the conical cavity, and the dust guide space in the center, which can effectively reduce the vibration and noise generated by the motor in the motor assembly chamber 21 when it is working, and produce good vibration reduction and noise reduction effects.

[0160] In order to further improve the noise reduction effect of the compartment, the compartment is filled with sound-absorbing cotton to further reduce the noise generated when the motor is working and improve the noise reduction effect of the second filter component.

[0161] The second filter assembly further includes a cover 25 , which is disposed on the top of the side wall of the second filter assembly, that is, the cover 25 is disposed on the top of the motor assembly cavity 21 , the cyclone cone 22 , and the connecting plate 24 .

[0162] Specifically, the cover body 25 is provided with an air guide area 251, an air inlet area 252 and an air outlet area 253. The air outlet area 253 is arranged on the outside of the air inlet area 252, and the air guide area 251 is arranged on the outside of the air outlet area 253. The air guide area 251 corresponds to the cyclone cone 22 and the connecting plate 24, and the air inlet area 252 and the air outlet area 253 correspond to the motor assembly cavity 21. The air guide area 251 is used to guide the fluid after secondary filtration, and the air inlet area 252 and the air outlet area 253 are used to bring the fluid in and out of the motor assembly cavity 21, so that the motor assembly cavity 21 can achieve fluid interaction with the outside world.

[0163] The air guide area 251 is provided with an air guide port 206 to guide the fluid after secondary filtration out of the cyclone cone 22. In this embodiment, the number of the air guide ports 206 is consistent with the number of the cyclone cones 22, and the air guide ports 206 correspond to the cyclone cones 22 one by one. The air guide ports 206 are connected to the air outlet 204, so that the filtered fluid is guided out of the second filter assembly through the air guide ports 206.

[0164] The air inlet area 252 is provided with an air inlet 207 communicating with the motor assembly cavity 21 , and the fluid enters the motor assembly cavity 21 through the air inlet 207 .

[0165] The air outlet area 253 is provided with an air outlet 208 communicating with the motor assembly cavity 21 , and the fluid in the motor assembly cavity 21 is discharged from the motor assembly cavity 21 through the air outlet 208 . A plurality of air outlets 208 are provided, and these air outlets 208 are arranged outside the air inlet 207 .

[0166] In this embodiment, the air inlet area 252 is located at the center of the cover body 25 , and the air inlet 207 is located at the center of the cover body 25 .

[0167] In order to allow the fluid to be introduced into the motor assembly cavity 21 more quickly, the air inlet area 252 gradually bulges outward from the edge to the center (that is, bulges in the direction away from the motor assembly cavity 21), that is, the air inlet area 252 forms a downward slope from the center to the edge, and specifically, the air inlet area 252 is shaped like a trumpet, and the trumpet opening faces the motor assembly cavity 21. In this way, the air inlet 207 is higher (or more outward) than the air outlet 208, so that the fluid can be introduced into the motor assembly cavity 21 from the air inlet 207 more quickly.

[0168] In this embodiment, the air outlet 208 is fan-shaped, with its arc facing the air inlet area 252. The number of air outlets 208 is 5, which are evenly distributed in the air outlet area 253, so that the total area of ​​the air outlets 208 can be guaranteed to be large enough without affecting the discharge of fluid to the outside, while ensuring the stability and strength of the air inlet area 252.

[0169] In order to make the cyclone cone 22 have a better filtering effect and speed up the discharge of the filtered fluid, the cover body 25 is provided with an air guide duct 254, one end of the air guide duct 254 is connected to the air guide port 206, and the other end extends from the air guide port 206 into the cyclone cone 22, and the port located in the cyclone cone 22 is located below the air inlet 203 to prevent the fluid after the first-stage filtration from being directly discharged from the cyclone cone 22 without cyclone filtration.

[0170] In this embodiment, the air inlet 203 is opened at the top of the side wall of the cyclone part 221, that is, the air inlet 203 is opened downward from the top of the side wall of the cyclone part 221, so that the dust-containing fluid entering the cyclone chamber through the air inlet 203 can better achieve cyclone dust removal.

[0171] In this embodiment, the length of the air guide 254 is greater than or equal to 1 / 3 of the length of the cyclone section 221 and less than or equal to 2 / 3 of the length of the cyclone section 221, ensuring that the fluid after the first-level filtration can be subjected to the second-level filtration in the cyclone section 221, and can guide the fluid after the second-level filtration to be discharged from the cyclone cone 22 as soon as possible.

[0172] In order to better form a cyclone in the cyclone part 221, a guide part 26 is provided at the air inlet 203. The fluid after primary filtration enters the cyclone part 221 in a manner tangent to the side wall of the cyclone chamber under the guiding effect of the guide part 26. Specifically, the guide part 26 is provided with an air inlet channel that is connected to the air inlet 203. The air inlet channel is tangent to the side wall of the cyclone chamber. Through the flow guidance, the fluid after primary filtration forms a cyclone in the cyclone chamber faster and easier, thereby improving the filtering effect of the cyclone cone 22.

[0173] In this embodiment, the guide portion 26 includes a lower plate 261 and a side plate 262, the side plate 262 is tangent to the side wall of the cyclone portion 221, and the connecting plate 24, the lower plate 261, the side plate 262 and the cover body 25 together enclose an air inlet channel tangent to the cyclone chamber. Specifically, the lower plate 261 is arranged along the bottom end of the air inlet and is flush with the bottom end of the air inlet 203, the side plate 262 is arranged along the outer end of the air inlet 203 and is flush with the outer end of the air inlet 203, the bottom end of the side plate 262 is connected to the lower plate 261, the top end of the side plate 262 is in contact with the cover body 25, the outer side of the lower plate 261 is connected to the side plate 262, and the inner side of the lower plate 261 is connected to the connecting plate 24.

[0174] It should be noted that the central axes of the first filter assembly 1 and the second filter assembly 2 are collinear, which is the central axis of the filter device. In this embodiment, the central axes of the fluid conduit 11, the filter portion 12, the dust collecting ring wall, the upper side wall portion, the dust guide 23, the motor assembly cavity 21, and the cover body 25 are all collinear with the central axis of the filter device, so that the overall structure of the filter device is compact, stable, and easy to produce and process.

[0175] Embodiment 2

[0176] This embodiment provides a dust collection device, such as Figure 19 to Figure 22 As shown, it includes the filtering device provided in the above-mentioned embodiment 1.

[0177] Compared with the prior art, the dust collection device provided by the present invention has the beneficial effects of the filtering device provided by the first embodiment, which will not be described in detail here.

[0178] The dust collecting device further comprises a dust collecting cup 3 , and a dust collecting port 301 is provided at the bottom of the dust collecting cup 3 .

[0179] The filter device can be detachably installed in the dust cup 3, the bottom end of the fluid pipe 11 is in sealing contact with the bottom of the dust cup 3, and the fluid inlet 101 is connected with the dust suction port 301, so that the dust-containing fluid entering the dust cup from the dust suction port 301 is all introduced into the filter device (first filter component) through the fluid inlet 101.

[0180] The partition 16 is in sealing contact with the side wall of the dust cup, and the cover body 25 is in sealing contact with the side wall of the dust cup, so that the first filter component 1 and the second filter component 2 divide a closed dust removal space without interfering with each other, so that the dust collection device has a better dust removal effect.

[0181] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A filtering device, characterized in that: include: A first filter assembly (1) for performing primary filtration on the fluid entering the filter device; A second filter assembly (2) is located downstream of the first filter assembly (1) to perform secondary filtration on the fluid filtered by the first filter assembly (1); Wherein, the second filter assembly (2) comprises a cyclone cone (22) and a motor assembly chamber (21); The motor assembly cavity (21) is used for assembling the motor; A plurality of cyclone cones (22) are provided, and the cyclone cones (22) are arranged around the outside of the motor assembly cavity (21) so as to perform cyclone filtering on the fluid entering the second filter assembly (2); The first filter assembly (1) is provided with a central dust collecting space for storing dust filtered out by the second filter assembly (2); The second filter assembly (2) further comprises a dust guide (23), wherein the dust guide (23) is respectively connected to the central dust collecting space and the cyclone cone (22) so as to guide the dust filtered by the cyclone cone (22) into the central dust collecting space; The first filter assembly (1) comprises a fluid pipeline (11), a filter portion (12), a flow guide portion (13) and a dust collecting ring wall (15); The fluid conduit (11) is provided with a fluid inlet (101) and a fluid outlet (102), and at least a portion of the fluid conduit (11) is enclosed inside the side wall of the first filter assembly (1); The filter portion (12) is disposed around the outside of the fluid pipeline (11), and the filter portion (12) constitutes a part of the side wall of the first filter assembly (1); One end of the flow guide portion (13) is connected to the fluid outlet (102), and the other end of the flow guide portion (13) faces the filter portion (12) so as to guide the fluid in the fluid pipeline (11) to the filter portion (12); The dust collecting annular wall (15) is located between the side wall of the fluid pipeline (11) and the first filter assembly (1), the bottom end of the dust collecting annular wall (15) is connected to the bottom plate of the first filter assembly (1), and a gap is provided between the dust collecting annular wall (15) and the side wall of the fluid pipeline (11) and the first filter assembly (1); The central dust collecting space is enclosed between the dust collecting ring wall (15), the fluid pipeline (11) and the bottom plate (14) of the first filter assembly (1); A circulation space is enclosed between the dust collecting ring wall (15), the bottom plate (14) of the first filter assembly (1), and the first filter assembly (1) to allow the fluid after primary filtration to circulate; The flow guide portion (13) spirally extends from the fluid outlet (102) to the filter portion (12); The dust guide member (23) is located below the motor assembly cavity (21) and the cyclone cone (22); The bottom of the dust guide (23) is butted against the top of the side wall of the first filter assembly (1); An air guide port (201) and a dust collection port (202) are provided at the bottom of the dust guide member (23); the air guide port (201) is connected to the circulation space, and the dust collection port (202) is connected to the central dust collection space.

2. The filtering device according to claim 1, characterized in that: The flow guide portion (13) comprises a transverse plate (131) and a spiral plate (132); the transverse plate (131) is located above the fluid outlet (102); the spiral plate (132) is connected to the transverse plate (131), and the spiral direction of the spiral plate (132) faces the filter portion (12).

3. The filtering device according to claim 2, characterized in that: The guide portion (13) further comprises a baffle (133), one end of the baffle (133) being vertically connected to the transverse plate (131), the other end of the baffle (133) being connected to the spiral plate (132), and the inner side of the baffle (133) being connected to the side wall of the first filter assembly (1).

4. The filtering device according to claim 1, characterized in that: The dust guide member (23) comprises a conical ring wall (231) and a bottom cover (232); the bottom cover (232) is connected to the bottom of the conical ring wall (231); and the bottom cover (232) is provided with the air guide port (201) and the dust collection port (202).

5. The filtering device according to claim 4, characterized in that: The bottom cover (232) comprises a cover plate portion (232a), and the cover plate portion (232a) is arranged to cover the top end of the fluid pipeline (11); The shape of the bottom end of the conical ring wall (231) is adapted to the shape of the top end of the dust collecting ring wall (15); a portion of the bottom end of the conical ring wall (231) is connected to the upper end surface of the cover plate portion (232a); and the remaining portion of the bottom end of the conical ring wall (231) is in contact with the dust collecting ring wall (15); The bottom end of the conical annular wall (231) and the cover plate portion (232a) enclose the dust collecting port (202); The air guide port (201) is located outside the conical ring wall (231).

6. The filtering device according to claim 5, characterized in that: A plurality of support bars (232b) are provided in the air guide port (201), one end of the support bar (232b) is connected to the conical ring wall (231), and the other end of the support bar (232b) is connected to the side wall of the bottom cover (232); A support plate (232c) is provided between the top end surface of the bottom cover (232) and the conical annular wall (231).

7. The filtering device according to claim 5, characterized in that: The conical annular wall (231) gradually inclines outwards from bottom to top.

8. The filtering device according to claim 5, characterized in that: The outer edge of the top end of the conical annular wall (231) is arranged around the outside of the bottom of the cyclone cone (22) and the motor assembly cavity (21).

9. The filtering device according to claim 8, characterized in that: The cyclone cone (22) is provided with an air inlet (203), an air outlet (204) and a dust guide port (205); The dust guide port (205) is located at the lowest point of the cyclone cone (22), and the conical annular wall (231) is arranged around the outside of the dust guide port (205); The air inlet (203) is provided on the side wall of the cyclone cone (22); The air outlet (204) is opened at the top end of the cyclone cone (22).

10. The filtering device according to claim 9, characterized in that: A connecting plate (24) is provided between two adjacent cyclone cones (22), and the connecting plate (24) extends from the top end of the side wall of the cyclone cone (22) to the bottom end of the side wall of the cyclone cone (22); The air inlet (203) is located on the outer side of the connecting plate (24); The top of the conical annular wall (231) is sealed and connected to the connecting plate (24) and the bottom of the cyclone cone (22), and the conical annular wall (231) is arranged around the outside of the dust guide port (205).

11. The filtering device according to claim 10, characterized in that: The second filter assembly (2) further comprises a cover body (25), the cover body (25) being arranged on the top of the motor assembly cavity (21), the cyclone cone (22), and the connecting plate (24); The cover body (25) is provided with an air guide area (251), an air inlet area (252) and an air outlet area (253); the air outlet area (253) is arranged outside the air inlet area (252); the air guide area (251) is arranged outside the air outlet area (253); the air guide area (251) corresponds to the cyclone cone (22) and the connecting plate (24); the air inlet area (252) and the air outlet area (253) correspond to the motor assembly cavity (21).

12. The filtering device according to claim 11, characterized in that: The air guide area (251) is provided with an air guide port (206), the air guide port (206) corresponds one-to-one with the cyclone cone (22), and the air guide port (206) is connected with the air outlet (204); The air inlet area (252) is provided with an air inlet (207) communicating with the motor assembly cavity (21); The air outlet area (253) is provided with an air outlet (208) which is in communication with the motor assembly cavity (21).

13. The filtering device according to any one of claims 2 to 12, characterized in that: A partition (16) is provided at the top end of the side wall of the first filter assembly (1), the partition (16) is arranged around the outside of the side wall of the first filter assembly (1), and the partition (16) is located above the flow guide portion (13).

14. A dust collection device, characterized in that: The invention comprises a filtering device as claimed in any one of claims 1 to 13.

15. The dust collection device according to claim 14, characterized in that: It also includes a dust cup, and the filter device is detachably mounted in the dust cup; The partition plate (16) of the first filter assembly (1) and the cover body (25) of the second filter assembly (2) are in sealing contact with the side wall of the dust cup.

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