Cyclone separation structure and dust separation device

Abstract

The present invention relates to the technical field of cleaning devices, and specifically to a cyclone separation structure and a dust and dirt separation device, wherein the cyclone separation structure comprises a base, a cyclone separation assembly and a flow stabilizing structure, wherein the body comprises a cup body, wherein the cup body has a cup cavity and a dust gas inlet and an air flow outlet communicated with the cup cavity; the cyclone separation assembly is arranged on the base and located in the cup cavity, and comprises a first cyclone separator, wherein the first cyclone separator comprises a plurality of air inlets and a plurality of air outlets, wherein the air inlet is communicated with the dust gas inlet, and the air outlet is communicated with the air flow outlet; the flow stabilizing structure is arranged on the base and located in the cup cavity, and is located between the dust gas inlet and the air inlet, and is suitable for guiding the dust gas to each of the air inlets. By implementing the present invention, the dust gas is guided to each of the air inlets, cross flow at the air inlet is suppressed, air intake fluctuation is reduced, and air intake stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning devices, and in particular to a cyclone separation structure and a dust and dirt separation device. Background Art

[0002] At present, some vacuum cleaners use cyclone separators to achieve gas-solid separation. However, when the cyclone separator processes a large amount of gas, a single large-diameter cyclone separator often cannot guarantee the separation efficiency. Multiple small-diameter cyclone separators need to be connected in parallel to obtain a higher separation efficiency. However, the air inlet positions of each cyclone separator are different, and the distances from the air inlet to the dust and gas inlet are different, which can easily cause cross airflow, resulting in uneven flow distribution of each cyclone separator, which in turn affects the separation efficiency of the whole machine. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that easily cause cross airflow and lead to uneven flow distribution of each cyclone separator, thereby providing a cyclone separation structure and dust separation device that can guide dust and gas to each air inlet and suppress cross airflow.

[0004] The present invention provides a cyclone separation structure, comprising:

[0005] The base body comprises a cup body, wherein the cup body has a cup cavity and a dust gas inlet and an air flow outlet communicated with the cup cavity;

[0006] A cyclone separation assembly, arranged on the base and located in the cup cavity, comprises a first cyclone separator, wherein the first cyclone separator comprises a plurality of air inlets and a plurality of air outlets, wherein the air inlets are communicated with the dust gas inlet, and the air outlets are communicated with the air flow outlet;

[0007] The flow stabilizing structure is arranged on the base and located in the cup cavity, between the dust gas inlet and the air inlet, and is suitable for guiding the dust gas to each of the air inlets.

[0008] Optionally, the first cyclone separator includes an external separation unit and an internal separation unit, the external separation unit and the internal separation unit respectively include a plurality of cyclone separation tubes, the plurality of cyclone separation tubes of the external separation unit are arranged in a ring shape and surround the plurality of cyclone separation tubes of the internal separation unit; any cyclone separation tube includes at least one air inlet and at least one air outlet.

[0009] Optionally, the cyclone separation tube of the external separation unit is an external separation tube, and the air inlet of the external separation tube is an external air inlet; the cyclone separation tube of the internal separation unit is an internal separation tube, and the air inlet of the internal separation tube is an internal air inlet;

[0010] The flow stabilizing structure includes a plurality of diversion structures, a diversion area is formed between two adjacent diversion structures, and each of the inner air inlets corresponds to one of the diversion areas.

[0011] Optionally, the number of the external separation tubes is consistent with the number of the diversion areas, and they are arranged in the diversion areas in a one-to-one correspondence.

[0012] Optionally, the diversion structure includes a first diversion portion and a second diversion portion;

[0013] The first flow diversion parts of the plurality of flow diversion structures are radially distributed on the substrate, and any of the first flow diversion parts extends from the inside of the cup cavity toward the cavity wall of the cup cavity, and the flow diversion area is formed between the first flow diversion parts of two adjacent flow diversion structures;

[0014] One end of the first flow diversion portion facing the cavity wall of the cup cavity is a connection end, and the second flow diversion portion is provided on the connection end and includes a first component extending from the connection end to the flow diversion area on one side of the first flow diversion portion, and a second component extending from the connection end to the flow diversion area on the other side of the first flow diversion portion, and an opening communicating with the corresponding flow diversion area is formed between the first component of any flow diversion structure and the second component of the adjacent flow diversion structure;

[0015] Each of the external air inlets corresponds to one of the second flow splitters.

[0016] Optionally, the diversion structure further includes an annular connecting portion, and one end of the first diversion portion away from the cavity wall of the cup cavity is connected to the annular connecting portion.

[0017] Optionally, the inner separation tube is located inside the annular connecting portion.

[0018] Optionally, the first diverter portion is a plate-shaped structure and is evenly distributed along the circumference of the annular connecting portion.

[0019] Optionally, the second diverter portion is a plate-shaped structure and is perpendicular to the first diverter portion.

[0020] Optionally, the air outlet is arranged at one end of the cyclone separation tube, the air inlet is arranged on the side of the cyclone separation tube close to the air outlet, a dust collecting port is arranged at one end of the cyclone separation tube away from the air outlet, the diameter of the cyclone separation tube gradually decreases along its axial direction from the air inlet to the dust collecting port, and the flow stabilizing structure is arranged close to the dust collecting port.

[0021] Optionally, the base further includes an ash falling cylinder, the ash falling cylinder is arranged below the first cyclone separation structure, one end of the cyclone separation tube provided with the dust collecting port is connected to the top of the ash falling cylinder, and the dust collecting port is in communication with the ash falling cylinder;

[0022] The flow stabilizing structure further includes a supporting portion, and the flow stabilizing structure is connected to the top of the ash dropping cylinder through the supporting portion.

[0023] Optionally, one end of the support portion is connected to the annular connecting portion, and the other end is connected to the ash dropping cylinder.

[0024] Optionally, the height of the support portion is L1, and L1 satisfies 5mm≤L1≤10mm.

[0025] Optionally, the cyclone separation tube has an air inlet channel and a cyclone channel extending axially of the cyclone separation tube. The air inlet channel extends tangentially of the cyclone channel of the cyclone separation tube, one end of which is connected to the cyclone channel and the other end of which constitutes the air inlet.

[0026] Optionally, the multiple inner separation tubes of the inner separation unit are arranged in a ring shape, the diameter of the circle of the center of the multiple inner air inlets of the inner separation unit is D1, and the inner diameter of the annular connecting part is L2, L2≤D1.

[0027] Optionally, the cyclone separation assembly further comprises a second cyclone separator communicated with the first cyclone separator, the second cyclone separator being arranged on the base and located in the cup cavity, and being located upstream of the first cyclone separator in the airflow direction, and the first cyclone separator being communicated with the dust gas inlet through the second cyclone separator;

[0028] The dust dropping cylinder is at least partially disposed in the second cyclone separator and defines a connecting air duct with the second cyclone separator, and the air inlet is communicated with the dust air inlet through the connecting air duct.

[0029] Optionally, the distance between the second flow diversion portion and the center of the flow stabilizing structure is L3, the maximum diameter of the ash falling cylinder is D2, the inner diameter of the cup cavity is D3, and D2≤L3≤0.9D3.

[0030] The present invention also provides a dust and dirt separation device, comprising the above-mentioned cyclone separation structure.

[0031] Optionally, the dust and dirt separation device is a vacuum cleaner.

[0032] The technical solution of the present invention has the following advantages:

[0033] 1. The cyclone separation structure provided by the present invention has a flow stabilizing structure, which guides the dust gas to each of the air inlets, corrects the air flow direction, suppresses the cross flow at the air inlet, reduces the air intake fluctuation, and improves the stability of the air intake.

[0034] 2. The cyclone separation structure provided by the present invention comprises an external separation unit and an internal separation unit, and has high separation efficiency.

[0035] 3. The cyclone separation structure provided by the present invention and the flow stabilizing structure include a plurality of diversion structures, through which the direction of the airflow flowing toward the inner air inlet is corrected, the cross flow at the inner air inlet is suppressed, the air intake fluctuation is reduced, the stability of the air intake is improved, and the separation efficiency of the whole machine is improved.

[0036] 4. In the cyclone separation structure provided by the present invention, the number of the external separation tubes is consistent with the number of the diversion areas, and they are arranged in the diversion areas in a one-to-one correspondence, and the airflow entering the external separation tubes is diverted and guided by the diversion areas.

[0037] 5. The cyclone separation structure provided by the present invention comprises a first diverter portion and a second diverter portion. The first diverter portion diverts the lateral airflow, and guides the airflow entering the diverter area through the opening to the inner air inlet; the second diverter portion diverts the upward airflow, and guides the upward airflow to flow to the corresponding outer air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 is a cross-sectional view of a cyclone separation structure of the present invention;

[0040] Figure 2 It is an exploded view of the installation of the cyclone separation structure of the present invention;

[0041] Figure 3 Schematic diagram of the cyclone separation structure of the present invention Figure 1 ;

[0042] Figure 4 Schematic diagram of the cyclone separation structure of the present invention Figure 2 ;

[0043] Figure 5 Schematic diagram of the cyclone separation structure (partial) of the present invention Figure 3 ;

[0044] Figure 6Schematic diagram of the cyclone separation structure (partial) of the present invention Figure 4 ;

[0045] Figure 7 Schematic diagram of the flow stabilizing structure of the present invention Figure 1 ;

[0046] Figure 8 Schematic diagram of the flow stabilizing structure of the present invention Figure 2 ;

[0047] Fig. 9 Schematic diagram of the flow stabilizing structure of the present invention Figure 3 ;

[0048] Fig.10 It is a bottom view of the first cyclone separator of the present invention.

[0049] Description of reference numerals:

[0050] 1-cup body; 11-cup cavity; 12-dust and gas inlet; 13-air flow outlet; 2-first cyclone separator; 21-external separation tube; 211-external air inlet; 22-internal separation tube; 221-internal air inlet; 23-dust collecting port; 24-air outlet; 3-flow stabilizing structure; 31-diversion structure; 311-first diversion part; 312-second diversion part; 32-annular connecting part; 33-support part; 4-ash dropping cylinder; 5-second cyclone separator; 51-connecting air duct; 52-air flow duct; 6-partition; 7-filter. DETAILED DESCRIPTION

[0051] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] 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.

[0055] like Figure 1-10 As shown, a cyclone separation structure is provided in this embodiment for realizing gas-solid separation, including a base, a cyclone separation assembly and a flow stabilizing structure 3, wherein the base includes a cup body 1, the cup body 1 having a cup cavity 11 and a dust gas inlet 12 and an air flow outlet 13 connected to the cup cavity 11, the dust gas inlet 12 is used for dust-containing gas to enter, and the air flow outlet 13 is used for discharging clean dust-free gas; the cyclone separation assembly is arranged on the base and located in the cup cavity 11, including a first cyclone separator 2, the first cyclone separator 2 includes a plurality of air inlets and a plurality of air outlets 24, the air inlet is connected to the dust gas inlet 12, and the air outlet 24 is connected to the air flow outlet 13; the flow stabilizing structure 3 is arranged on the base and located in the cup cavity 11, located between the dust gas inlet 12 and the air inlet, and is suitable for guiding the dust gas to each of the air inlets.

[0056] The cyclone separation structure has a flow stabilizing structure 3, which guides the dust gas to each of the air inlets, corrects the air flow direction, suppresses the cross flow at the air inlet, reduces the air intake fluctuation, and improves the stability of the air intake.

[0057] In this embodiment, the first cyclone separator 2 includes an outer separation unit and an inner separation unit, and the outer separation unit and the inner separation unit respectively include a plurality of cyclone separation tubes, and the plurality of cyclone separation tubes of the outer separation unit are arranged in a ring shape and surround the plurality of cyclone separation tubes of the inner separation unit; any of the cyclone separation tubes includes at least one air inlet and at least one air outlet 24. Gas-solid separation is achieved by using a plurality of cyclone separation tubes, and the separation efficiency is high. Moreover, the plurality of cyclone separation tubes are all small separation tubes. The smaller the size of the cyclone separation tube, the smaller the cut particle size, and the higher the separation efficiency. A plurality of small cyclone separation tubes can achieve a higher separation efficiency.

[0058] As a convertible implementation, the cyclone separator may include a plurality of cyclone separation tubes, each of which has at least two air inlets at different positions.

[0059] In this embodiment, the cyclone separation tube of the external separation unit is an external separation tube 21, and the air inlet of the external separation tube 21 is an external air inlet 211; the cyclone separation tube of the internal separation unit is an internal separation tube 22, and the air inlet of the internal separation tube 22 is an internal air inlet 221.

[0060] The flow stabilizing structure 3 includes a plurality of flow diversion structures 31, and a flow diversion area is formed between two adjacent flow diversion structures 31, and each inner air inlet 221 corresponds to one of the flow diversion areas. The flow diversion structure 31 corrects the direction of the airflow flowing to the inner air inlet 221, suppresses the cross flow at the inner air inlet 221, reduces the fluctuation of the air intake, improves the stability of the air intake, and improves the separation efficiency of the whole machine.

[0061] In this embodiment, the number of the external separation tubes 21 is consistent with the number of the diversion areas, and they are arranged in the diversion areas in a one-to-one correspondence, and the airflow entering the external separation tubes 21 is diverted and guided by the diversion areas.

[0062] In this embodiment, the diversion structure 31 includes a first diversion portion 311 and a second diversion portion 312;

[0063] The first diverter portions 311 of the plurality of diverter structures 31 are radially distributed on the substrate, and any of the first diverter portions 311 extend from the inside of the cup cavity 11 toward the cavity wall of the cup cavity 11, and the diverter area is formed between the first diverter portions 311 of two adjacent diverter structures 31. One end of the first diverter portion 311 facing the cavity wall of the cup cavity 11 is a connecting end, and the second diverter portion 312 is provided on the connecting end, and includes a first component extending from the connecting end to the diverter area on one side of the first diverter portion 311, and a second component extending from the connecting end to the diverter area on the other side of the first diverter portion 311. An opening communicating with the corresponding diverter area is formed between the first component of any diverter structure 31 and the second component of the adjacent diverter structure 31. Each of the external air inlets 211 corresponds to a second diverter portion 312.

[0064] The first diverter 311 diverts the lateral airflow and guides the airflow entering the diverter area through the opening to the inner air inlet 221 ; the second diverter 312 diverts the upward airflow and guides the upward airflow to flow to the corresponding outer air inlet 211 .

[0065] In this embodiment, the flow splitting structure 31 further includes an annular connecting portion 32, and one end of the first flow splitting portion 311 away from the cavity wall of the cup cavity 11 is connected to the annular connecting portion 32. The annular connecting portion 32 connects the various flow splitting structures 31 into one, and the annular connecting portion 32 restricts the gas flow at one end of the first flow splitting portion 311 away from the cavity wall of the cup cavity 11 to prevent crossflow between the flow splitting areas.

[0066] In this embodiment, the inner separation tube 22 is located in the annular connection portion 32. The annular connection portion 32 is used to define the end of the diversion area, so that air is better guided to the inner air inlet 221.

[0067] In this embodiment, the first flow splitter 311 is a plate-like structure, which is evenly distributed along the circumference of the annular connecting portion 32. The structure is simple and easy to form, so that the airflow is evenly distributed to each air inlet, cross-flow is suppressed, and cross-flow back-mixing phenomenon is improved.

[0068] In this embodiment, the second diverter portion 312 is a plate-shaped structure and is perpendicular to the first diverter portion 311. The structure is simple and easy to shape.

[0069] In this embodiment, the air outlet 24 is provided at one end of the cyclone separation tube, the air inlet is provided at the side of the cyclone separation tube close to the air outlet 24, the end of the cyclone separation tube away from the air outlet 24 is provided with a dust collecting port 23, the diameter of the cyclone separation tube gradually decreases along its axial direction from the air inlet to the dust collecting port 23, and the flow stabilizing structure 3 is provided close to the dust collecting port 23. The dust collecting port 23 is used to collect dust and discharge it out of the cyclone separation tube through the dust collecting port 23. The top of the cyclone separation tube has an air outlet pipe, and the air outlet 24 is provided at one end of the air outlet pipe away from the top of the cyclone separation tube.

[0070] In this embodiment, the base also includes an ash falling cylinder 4, which is arranged below the first cyclone separation structure. The cyclone separation tube is provided with one end of the dust collecting port 23 connected to the top of the ash falling cylinder 4, and the dust collecting port 23 is connected to the ash falling cylinder 4. The ash falling cylinder 4 is used to collect dust. The top of the ash falling cylinder 4 is provided with a plurality of openings. The cyclone separation tube is connected to the top of the ash falling cylinder 4, and each of the openings corresponds to a dust collecting port 23; the flow stabilizing structure 3 also includes a support portion 33, and the flow stabilizing structure 3 is connected to the top of the ash falling cylinder 4 through the support portion 33.

[0071] The cyclone separation structure also includes a partition 6, which is arranged on the top of the first cyclone separator 2 and connected to the cavity wall of the cup cavity 11, dividing the cup cavity 11 into an air inlet cavity and an air exhaust cavity. The partition 6 is provided with a plurality of through holes. The first cyclone separator 2 is arranged in the air inlet cavity, and the air outlet 24 of the cyclone separation tube is connected to the air inlet cavity through the through holes. Since multiple cyclone separation tubes use the same dust collection tube 4 and the same exhaust cavity, when the air inlet flow rate of the cyclone separation tube is uniform, it is easy to cause cross-flow and back mixing in the dust collection tube 4, affecting the overall separation performance of the cyclone separation structure. The cyclone separation structure also includes a filter screen 7, which is arranged in the exhaust cavity and is located between the through hole and the air flow outlet 13.

[0072] In this embodiment, a flow stabilizing structure 3 is provided, and the flow stabilizing structure 3 is provided in the air inlet cavity, between the dust dropping cylinder 4 and the air inlet, and the dust gas is guided to each of the air inlets, so that the airflow is distributed to each air inlet more evenly, the airflow direction is corrected, the cross flow at the air inlet is suppressed, the air intake fluctuation is reduced, the stability of the air intake is improved, the crossflow back mixing phenomenon is improved, and a good separation efficiency is obtained. A support portion 33 is provided to fix the flow stabilizing structure 3 on the top of the dust dropping cylinder 4, and to appropriately increase the distance between the flow stabilizing structure 3 and the dust gas inlet 12, so as to better divert the air intake, and prevent the airflow diverted to the inner air inlet 221 from being much less than the airflow diverted to the outer air inlet 211.

[0073] The dust and gas inlet 12 is arranged on the cavity wall of the air inlet cavity, and the air inlet direction is tangent to the cavity wall of the air inlet cavity. The top of the dust dropping cylinder 4 divides the air inlet cavity into a first air inlet cavity and a second air inlet cavity, the cyclone separation component is arranged in the first air inlet cavity, the dust dropping cylinder 4 is arranged in the second air inlet cavity, and the dust and gas inlet 12 is arranged in the second air inlet cavity.

[0074] In this embodiment, one end of the support portion 33 is connected to the annular connection portion 32 , and the other end is connected to the ash falling cylinder 4 .

[0075] In this embodiment, the height of the support portion 33 is L1, and L1 satisfies 5mm≤L1≤10mm. The dust gas enters the first air inlet cavity through the gap between the top of the ash falling tube 4 and the cavity wall of the cup cavity 11, and is then guided by the flow stabilizing structure 3. The height of the support portion 33 cannot be too large, which may easily cause the second diverter portion 312 to fail to guide the air to the external air inlet 211 in time, nor can it be too small, which may affect the diversion range and diversion efficiency of the diversion area. In this embodiment, 5mm≤L1≤10mm increases the area of ​​the diversion area, guides the dust gas to enter the diversion area through the opening, enhances the diversion effect, and crosses the flow on the lower side of the flow stabilizing structure 3, thereby improving the airflow stability. In a specific embodiment, the height L1 of the support portion 33 is 5mm; in another specific embodiment, the height L1 of the support portion 33 is 10mm.

[0076] In this embodiment, the cyclone separation tube has an air inlet channel and a cyclone channel extending axially of the cyclone separation tube. The air inlet channel extends tangentially of the cyclone channel of the cyclone separation tube, one end of which is connected to the cyclone channel and the other end of which constitutes the air inlet.

[0077] In this embodiment, the plurality of inner separation tubes 22 of the inner separation unit are arranged in a ring shape, the diameter of the circle of the center of the plurality of inner air inlets 221 of the inner separation unit is D1, and the inner diameter of the annular connecting portion 32 is L2, L2≤D1. The diversion area of ​​the diversion area is increased to enhance the diversion effect.

[0078] In this embodiment, the cyclone separation assembly also includes a second cyclone separator 5 connected to the first cyclone separator 2. The second cyclone separator 5 is arranged on the base and located in the cup cavity 11, and is located upstream of the first cyclone separator 2 in the airflow direction. The first cyclone separator 2 is connected to the dust and gas inlet 12 through the second cyclone separator 5; a flow duct 52 connected to the dust and gas inlet 12 is defined between the second cyclone separator 5 and the cavity wall of the cup cavity 11.

[0079] The dust-falling cylinder 4 is at least partially disposed in the second cyclone separator 5, and defines a connecting air passage 51 with the second cyclone separator 5, and the air inlet is connected to the dust gas inlet 12 through the connecting air passage 51. The second cyclone separator 5 is provided with a plurality of flow openings, and the air flow passage 52 is connected to the connecting air passage 51 through the flow openings. The connecting air passage 51 is connected to the air inlet of the first cyclone separator 2. The dust-falling cylinder 4 is funnel-shaped, and includes a first cylinder portion in a truncated cone shape and a second cylinder portion in a cylindrical shape.

[0080] In this embodiment, the distance between the second flow diverter 312 and the center of the flow stabilizing structure 3 is L3, the maximum diameter of the ash drop cylinder 4 is D2, the inner diameter of the cup cavity 11 is D3, and D2≤L3≤0.9D3. The upward flow guiding efficiency of the second flow diverter 312 is enhanced, the airflow is guided into the external air inlet 211, and the airflow stability below the external air inlet 211 is improved, so that the flow distribution between each cyclone separation tube is more balanced, the cross-flow back-mixing phenomenon is improved, and the separation efficiency is improved.

[0081] In this embodiment, a dust and dirt separation device is also provided, including the above-mentioned cyclone separation structure.

[0082] In this embodiment, the dust and dirt separation device is a vacuum cleaner.

[0083] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A cyclone separation structure, characterized in that: include: The base body comprises a cup body (1), wherein the cup body (1) has a cup cavity (11) and a dust gas inlet (12) and an air flow outlet (13) communicated with the cup cavity (11); A cyclone separation component, arranged on the base and located in the cup cavity (11), comprising a first cyclone separator (2), the first cyclone separator (2) comprising a plurality of air inlets and a plurality of air outlets (24), the air inlets being in communication with the dust gas inlet (12), and the air outlets (24) being in communication with the air flow outlet (13); the first cyclone separator (2) comprising an external separation unit and an internal separation unit, the external separation unit and the internal separation unit respectively comprising a plurality of cyclone separation tubes; the cyclone separation tube of the external separation unit is an external separation tube (21), and the air inlet of the external separation tube (21) is an external air inlet (211); the cyclone separation tube of the internal separation unit is an internal separation tube (22), and the air inlet of the internal separation tube (22) is an internal air inlet (221); A flow stabilizing structure (3) is arranged on the base and located in the cup cavity (11), located between the dust gas inlet (12) and the air inlet, and is suitable for guiding the dust gas to each of the air inlets; the flow stabilizing structure (3) includes a plurality of flow diversion structures (31), a flow diversion area is formed between two adjacent flow diversion structures (31), and each of the inner air inlet (221) corresponds to one of the flow diversion areas; the flow diversion structure (31) includes a first flow diversion part (311) and a second flow diversion part (312); the first flow diversion parts (311) of the plurality of flow diversion structures (31) are radially distributed on the base, and any of the first flow diversion parts (311) extends from the inside of the cup cavity (11) toward the cavity wall of the cup cavity (11), and the space between two adjacent flow diversion structures (31) is equal to the space between the first flow diversion parts (311) and the second flow diversion parts (312). The diversion area is formed between the first diversion parts (311) of the flow structure (31); one end of the first diversion part (311) facing the cavity wall of the cup cavity (11) is a connecting end, and the second diversion part (312) is arranged on the connecting end, and includes a first component extending from the connecting end to the diversion area on one side of the first diversion part (311), and a second component extending from the connecting end to the diversion area on the other side of the first diversion part (311); an opening connected to the corresponding diversion area is formed between the first component of any diversion structure (31) and the second component of the adjacent diversion structure (31); each of the external air inlets (211) corresponds to a second diversion part (312).

2. The cyclone separation structure according to claim 1, characterized in that: The multiple cyclone separation tubes of the outer separation unit are arranged in a ring shape and surround the multiple cyclone separation tubes of the inner separation unit; any one of the cyclone separation tubes includes at least one air inlet and at least one air outlet (24).

3. The cyclone separation structure according to claim 2, characterized in that: The number of the external separation tubes (21) is consistent with the number of the flow diversion areas, and they are arranged in the flow diversion areas in a one-to-one correspondence.

4. The cyclone separation structure according to claim 1, characterized in that: The diversion structure (31) further comprises an annular connecting portion (32), and one end of the first diversion portion (311) away from the cavity wall of the cup cavity (11) is connected to the annular connecting portion (32).

5. The cyclone separation structure according to claim 4, characterized in that: The inner separation tube (22) is located inside the annular connecting portion (32).

6. The cyclone separation structure according to claim 4, characterized in that: The first flow dividing portion (311) is a plate-shaped structure and is evenly distributed along the circumference of the annular connecting portion (32).

7. The cyclone separation structure according to claim 6, characterized in that: The second flow dividing portion (312) is a plate-shaped structure and is perpendicular to the first flow dividing portion (311).

8. The cyclone separation structure according to claim 5, characterized in that: The air outlet (24) is arranged at one end of the cyclone separation tube, the air inlet is arranged at the side of the cyclone separation tube close to the air outlet (24), and a dust collecting port (23) is arranged at one end of the cyclone separation tube away from the air outlet (24). The diameter of the cyclone separation tube gradually decreases along its axial direction from the air inlet to the dust collecting port (23), and the flow stabilizing structure (3) is arranged close to the dust collecting port (23).

9. The cyclone separation structure according to claim 8, characterized in that: The base body also includes an ash falling cylinder (4), the ash falling cylinder (4) is arranged below the first cyclone separation structure, one end of the cyclone separation tube provided with the dust collecting port (23) is connected to the top of the ash falling cylinder (4), and the dust collecting port (23) is in communication with the ash falling cylinder (4); The flow stabilizing structure (3) further comprises a supporting portion (33), and the flow stabilizing structure (3) is connected to the top of the ash dropping cylinder (4) via the supporting portion (33).

10. The cyclone separation structure according to claim 9, characterized in that: One end of the support portion (33) is connected to the annular connection portion (32), and the other end is connected to the ash dropping cylinder (4).

11. The cyclone separation structure according to claim 10, characterized in that: The support portion (33) has a height L1, and L1 satisfies 5 mm ≤ L1 ≤ 10 mm.

12. The cyclone separation structure according to claim 8, characterized in that: The cyclone separation tube has an air inlet channel and a cyclone channel extending axially of the cyclone separation tube. The air inlet channel extends tangentially of the cyclone channel of the cyclone separation tube, one end of which is connected to the cyclone channel and the other end of which constitutes the air inlet.

13. The cyclone separation structure according to claim 12, characterized in that: The multiple inner separation tubes (22) of the inner separation unit are arranged in a ring shape, the diameter of the circle at the center of the multiple inner air inlets (221) of the inner separation unit is D1, and the inner diameter of the annular connecting portion (32) is L2, L2≤D1.

14. The cyclone separation structure according to claim 9 or 10, characterized in that: The cyclone separator assembly further comprises a second cyclone separator (5) connected to the first cyclone separator (2); the second cyclone separator (5) is arranged on the base and located in the cup cavity (11), and is located upstream of the first cyclone separator (2) in the airflow direction; the first cyclone separator (2) is connected to the dust gas inlet (12) through the second cyclone separator (5); The dust collecting cylinder (4) is at least partially arranged in the second cyclone separator (5), and defines a connecting air duct (51) with the second cyclone separator (5), and the air inlet is connected to the dust gas inlet (12) through the connecting air duct (51).

15. The cyclone separation structure according to claim 11, characterized in that: The distance between the second flow diversion portion (312) and the center of the flow stabilizing structure (3) is L3, the maximum diameter of the ash dropping cylinder (4) is D2, the inner diameter of the cup cavity (11) is D3, and D2≤L3≤0.9D3.

16. A dust and dirt separation device, characterized in that: It comprises the cyclone separation structure as described in any one of claims 1 to 15.

17. The dust separation device according to claim 16, characterized in that: The dust and dirt separation device is a vacuum cleaner.

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