Cyclone separator, dust collection device and cleaning equipment

Abstract

The invention provides a cyclone separator, a dust collecting device and cleaning equipment, and belongs to the field of cleaning equipment. The cyclone separator comprises a plurality of taper pipes, wherein each taper pipe comprises a barrel part and a cone part extending from the barrel part along the axis of the barrel part; the barrel body part comprises a surrounding wall, a windward wall and an air inlet, the surrounding wall is arc-shaped and surrounds the axis of the barrel body part, the windward wall extends towards the center of the cyclone separator from the tail end of the surrounding wall in the tangential direction of the surrounding wall, the air inlet is defined by the windward wall and the front end of the surrounding wall, and the windward wall extends towards the center of the cyclone separator in the air inlet direction of the air inlet. A first chamfer part in fillet transition is formed at the front end of the fence wall, and a second chamfer part in fillet transition is formed at the tail end of the windward wall. According to the cyclone separator, the dust collecting device and the cleaning equipment provided by the invention, airflow can turn along the wall when entering the taper pipe from the air inlet, and the resistance gradient and the speed sudden change when the airflow enters are reduced, so that the generation of vortex is inhibited, and the probability that dust-containing airflow is discharged from the riser in a short-circuit manner can be reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of cleaning equipment, and particularly relates to a cyclone separator, a dust collecting device and a cleaning equipment. BACKGROUND

[0002] As a typical gas-solid two-phase separation unit, the cyclone separator is widely used in household cleaning equipment, industrial dust removal and other scenes. Such a device relies on the tangential introduction of airflow to form a vortex field in the cylinder, so that particles migrate radially and settle under the action of centrifugal force, and relatively clean gas is discharged through the riser.

[0003] The existing cyclone separator usually includes a conical pipe structure composed of an upper cylinder part and a lower conical part. The cylinder part is responsible for the entry of airflow and the initial formation of rotational flow, while the conical part enhances the centrifugal force through the tapered design to promote dust particle settling. SUMMARY

[0004] The air inlet of many cyclone separators is prone to cause airflow to turn sharply, resulting in local high pressure area and velocity gradient, thereby inducing airflow turbulence and vortex formation. These vortices not only consume airflow kinetic energy, but also can cause part of the dust-containing airflow to directly short-circuit into the riser without undergoing sufficient rotational flow separation. This short-circuit phenomenon can carry dust particles into the downstream system, reducing the overall separation efficiency.

[0005] The purpose of the present disclosure is to provide a cyclone separator, a dust collecting device and a cleaning equipment which can inhibit the formation of turbulence at the air inlet, weaken airflow short-circuiting and pressure loss, and improve separation efficiency.

[0006] To achieve the above-mentioned purpose, the technical scheme provided by the present disclosure is as follows:

[0007] In a first aspect, the present disclosure provides a cyclone separator, which includes a plurality of conical pipes, each conical pipe including a cylinder part and a conical part extending from the cylinder part along an axis of the cylinder part; the cylinder part includes an enclosing wall, a windward wall and an air inlet, the enclosing wall is arc-shaped around the axis of the cylinder part, the windward wall extends from the end of the enclosing wall along the tangent direction of the enclosing wall towards the center of the cyclone separator, and the windward wall and the front end of the enclosing wall define the air inlet; wherein along the air inlet direction of the air inlet, the front end of the enclosing wall forms a first chamfer part with a rounded transition, and the end of the windward wall forms a second chamfer part with a rounded transition. The first chamfer part and the second chamfer part with a rounded transition are arranged at the air inlet, which reduces the formation of vortexes around the air inlet and avoids the direct short-circuiting of dust-containing airflow into the riser, thereby improving the separation efficiency of the cyclone separator.

[0008] In one or more embodiments, the distance between the first chamfer portion and the second chamfer portion gradually decreases along the air inlet direction of the air inlet. By gradually decreasing the distance between the first chamfer portion and the second chamfer portion, a trumpet-shaped air inlet is formed, further smoothing the air flow transition, reducing the turbulence intensity, and improving the stability of the air flow into the cylinder portion.

[0009] In one or more embodiments, the plurality of cone pipes are arranged in sequence around the center of the cyclone separator, and the distance from the air inlet of each cone pipe to the center of the cyclone separator is equal. By arranging the plurality of cone pipes in sequence around the center at equal distances, uniform air flow distribution to each cone pipe is achieved, avoiding local overload and improving the balance and efficiency of the overall separation system.

[0010] In one or more embodiments, the plurality of cone pipes collectively define an inscribed circle, and the windward wall of each cone pipe extends to the circumference of the inscribed circle. By defining an inscribed circle with the plurality of cone pipes and extending the windward wall to the circumference thereof, tangential uniform distribution of air flow is ensured.

[0011] In one or more embodiments, the plurality of cone pipes are arranged in mirror symmetry, and the cylinder portions of the two mirror-symmetric cone pipes can guide the air flow to form vortexes with opposite rotation directions.

[0012] In a second aspect, the present disclosure provides a dust collection device, which includes a dust cup, a primary separation assembly, a secondary separation assembly, and a fan; the dust cup has a receiving cavity and an air inlet communicating with the outside; the primary separation assembly is arranged in the receiving cavity, and includes a cyclone cone, a filter screen arranged in the cyclone cone along the axial direction of the cyclone cone, and a flow guide pipe; an air inlet passage of the cyclone cone communicates with the air inlet; the filter screen encloses an overflow passage communicating with the flow guide pipe, so that the air flow in the cyclone cone can be discharged along the flow guide pipe through the overflow passage; the secondary separation assembly includes a mounting seat and the aforementioned cyclone separator; the mounting seat includes an air inlet space communicating with the flow guide pipe; the cyclone separator is arranged in the air inlet space, so that the air flow discharged from the flow guide pipe can enter the air inlets of the cone pipes of the cyclone separator through the air inlet space; and the fan is used to provide negative pressure to the primary separation assembly and the secondary separation assembly. Through the multi-stage separation structure of the dust collection device, step-by-step dust-air separation under the driving of negative pressure is provided, and the overall dust removal performance is improved.

[0013] In one or more embodiments, the flow guide pipe includes a small pipe portion and a large pipe portion extending from the outlet end of the small pipe portion; the inlet end of the small pipe portion communicates with the overflow passage; the large pipe portion communicates with the air inlet space; and the diameter of the large pipe portion is greater than that of the small pipe portion. Through the design of the small pipe portion and the large pipe portion of the flow guide pipe with increasing diameters, the air flow speed is slowed down, the erosion of the mounting seat by high-speed air flow is reduced, the vortex generation is reduced, and the air flow transition stability is improved.

[0014] In one or more embodiments, the mounting base comprises a first shell and a second shell surrounding the periphery of the first shell, the first shell and the second shell defining the air inlet space therebetween, and a plurality of conical tubes of the cyclone separator surrounding the periphery of the first shell, the first shell having a mounting cavity for receiving the fan. The double-shell mounting base defines the air inlet space and places the fan in the central mounting cavity, thereby improving space utilization and structural compactness, and optimizing the device size.

[0015] In one or more embodiments, an annular positioning rib is provided between the first shell and the second shell, the positioning rib being in airtight connection with the top edge of the dust cup, the positioning rib being provided with a plurality of positioning holes arranged circumferentially along the positioning rib, and the discharge ports of the conical tubes being inserted into and fixed in the positioning holes. The annular positioning rib is in airtight connection with the top edge of the dust cup and is provided with the positioning holes for fixing the discharge ports of the conical tubes, thereby ensuring stable assembly and sealing of the components and preventing air leakage.

[0016] In one or more embodiments, the outer periphery of the positioning rib is integrally formed with the second shell, and the inner periphery of the positioning rib protrudes towards the flow guide tube to form a flange, the flange having an annular gap with the first shell and being in airtight abutment with the large tube portion, so as to guide the air discharged from the flow guide tube to the air inlet space. The flange of the positioning rib is in airtight abutment with the large tube portion and forms an annular gap, thereby directing the air to enter the air inlet space and avoiding scattered flow, and improving the uniformity of air distribution.

[0017] In one or more embodiments, the outer peripheral surface of the large tube portion extends radially outward to form a partition portion in airtight abutment with the inner side wall of the dust cup, the partition portion, together with the flange, the positioning rib, and the top edge of the dust cup, defining a dust collection space, and the discharge ports of the conical tubes extending through the positioning holes and into the dust collection space. The partition portion of the large tube portion, together with the flange, the positioning rib, and the top edge of the dust cup, defines the dust collection space, and the discharge ports extend into the dust collection space, thereby achieving independent collection of secondary dust particles and preventing dust mixing and dust return.

[0018] In one or more embodiments, the bottom of the first shell is provided with a conical surface portion coaxial with the flow guide tube and protruding into the large tube portion, the conical surface portion being used to guide the air discharged from the small tube portion to the periphery of the large tube portion. The conical surface portion of the bottom of the first shell guides the air from the small tube portion to the periphery of the large tube portion, thereby optimizing the air diffusion path, reducing central impact, and improving the uniformity of air entering the air inlet space.

[0019] In one or more embodiments, the inlet end of the small tube is provided with a baffle portion extending radially and axially along the small tube portion, the baffle portion being used to cause the airflow to tend to flow axially along the small tube portion. Through the radial and axial extension of the baffle portion at the inlet end of the small tube portion, the incoming airflow is rectified, causing it to tend to flow axially and preventing the formation of vortices within the small tube portion.

[0020] In one or more embodiments, the primary separation component further includes a dust collection bin docked with the cyclone cone, the bottom end of the cyclone cone extending into the dust collection chamber of the dust collection bin, and a dust discharge port communicating with the dust collection chamber on the bottom sidewall of the cyclone cone. By docking the dust collection bin with the cyclone cone and providing a lateral dust discharge port, dust particles are directed to settle into the dust collection chamber, preventing the escaping airflow from impacting the dust deposited at the bottom and reducing dust backflow.

[0021] In one or more embodiments, the secondary separation assembly further includes a conical cover over the top of the cyclone separator. The conical cover is disposed on multiple riser pipes corresponding to each cone of the cyclone separator. The riser pipes extend into the cones along their axes, allowing airflow within the cones to exit through the riser pipes. By axially extending into the cones with the conical cover and riser pipes, the top is sealed and clean airflow is guided out, ensuring thorough dust-air separation and improving secondary separation efficiency.

[0022] Thirdly, this disclosure provides a cleaning device, which includes a main unit and the aforementioned dust collection device, wherein the dust collection device is detachably installed on the main unit.

[0023] The cyclone separator, dust collection device, and cleaning equipment disclosed herein form a tangential air inlet by means of the enclosure wall and the windward wall of the cyclone separator cone tube. A first chamfer and a second chamfer with rounded transition are provided at the front end of the enclosure wall and the end of the windward wall, so that the air inlet forms a gradually changing inlet with continuous curvature. When the airflow enters the cone tube from the air inlet, it can turn along the wall, reducing the resistance gradient and velocity change when the airflow enters, thereby suppressing the generation of eddies and reducing the probability of dust-laden airflow being short-circuited and discharged from the riser pipe. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of a cyclone separator in one embodiment of the present disclosure;

[0026] Figure 2This is a top view of a cyclone separator according to an embodiment of the present disclosure;

[0027] Figure 3 This is a cross-sectional view of a dust collection device according to an embodiment of the present disclosure;

[0028] Figure 4 This is a schematic diagram of the structure of the guide tube in one embodiment of the present disclosure;

[0029] Figure 5 This is a schematic diagram of the mounting base in one embodiment of the present disclosure.

[0030] Explanation of key figure labels:

[0031] 1-Cyclone separator, 10-Conical tube, 11-Cylinder body, 111-Enclosure wall, 112-Windward wall, 113-Air inlet, 114-First chamfer, 115-Second chamfer, 12-Conical body, 13-Exhaust outlet, 2-Dust cup, 21-Receiving cavity, 22-Air inlet, 3-First-stage separation assembly, 31-Cyclone cone, 311-Dust outlet, 32-Filter screen, 33-Guide pipe, 331-Small pipe section, 332-Large pipe section, 33 3-Partition section, 334-Baffle section, 34-Overflow channel, 35-Dust collection bin, 351-Dust collection chamber, 4-Secondary separation component, 41-Mounting base, 411-First housing, 412-Second housing, 413-Air inlet space, 414-Mounting chamber, 415-Positioning rib, 416-Positioning hole, 417-Flange, 418-Annular gap, 419-Conical surface, 42-Dust collection space, 43-Air cone cover, 44-Rising air pipe, 5-Fan. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0033] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0034] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. In the embodiments shown in this disclosure, directional representations such as up, down, left, right, front, and back are relative and are used to explain the relative structure and movement of different components in this disclosure. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, then these representations are considered to change accordingly.

[0035] Existing cyclone separators primarily utilize centrifugal force to separate dust and gas. Dust-laden airflow enters the cyclone separator tangentially, forming a high-speed vortex. Dust particles are thrown against the wall and settle due to inertia, while clean gas is discharged through the central path. Traditional cyclone separator designs often focus on the cone shape and the extension of the separation path, neglecting the flow field organization at the inlet. As applications become increasingly miniaturized, the turbulence and uneven distribution of airflow around the inlet are gradually becoming key factors restricting separation efficiency.

[0036] Existing air inlet structures often employ simple openings, which can cause abrupt changes in airflow due to edge obstruction, leading to turbulent flow fields in localized areas. This turbulence not only consumes airflow energy but also induces vortices, further interfering with the overall swirling path. Some dust-laden airflow is not adequately separated and instead short-circuits directly from the periphery to the central discharge channel, carrying dust particles and escaping, thus reducing separation efficiency. This problem is amplified, especially in separators with multiple conical tubes connected in parallel. Uneven airflow distribution can cause overload in certain channels, further diffusion of vortices, and overall unstable separation performance.

[0037] Based on the understanding of the above problems, the design concept of this disclosure is to redefine the inlet morphology of the cyclone separator from the perspective of airflow organization. The inventors recognized that establishing a stable tangential momentum field before the airflow enters the separation chamber can effectively avoid subsequent short-circuit flow and backflow disturbances. Therefore, the technical solution provided in this disclosure introduces a continuous and gradually changing inlet geometry in the air inlet region, allowing the airflow direction and distribution to transition naturally before entering the separation chamber of the cyclone separator; simultaneously, by maintaining the geometric symmetry and pressure balance of each channel relative to the center in the multi-cone structure, uniform airflow distribution is ensured.

[0038] Specifically, this disclosure reduces the drag gradient and velocity abrupt changes when the airflow enters by smoothing the geometry of the inlet edge, thereby suppressing the generation and propagation of vortices. While maintaining the basic framework of the separator, transition optimization is introduced to guide the airflow to smoothly cut in, forming a more stable descending spiral path, ultimately enhancing the cyclone separation effect.

[0039] Please refer to Figure 1 and Figure 2 As shown, in one embodiment of this disclosure, a cyclone separator 1 includes a plurality of tapered tubes 10. Each tapered tube 10 includes a cylindrical portion 11 and a conical portion 12 extending from the cylindrical portion 11 along its axis. The cylindrical portion 11 includes a confining wall 111, a windward wall 112, and an air inlet 113. The confining wall 111 is arc-shaped around the axis of the cylindrical portion 11. The windward wall 112 extends from the end of the confining wall 111 along the tangent direction of the confining wall 111 toward the center of the cyclone separator 1. The windward wall 112 and the front end of the confining wall 111 define the air inlet 113. Along the air inlet direction of the air inlet 113, the front end of the confining wall 111 has a first chamfered portion 114 with a rounded corner transition, and the end of the windward wall 112 has a second chamfered portion 115 with a rounded corner transition.

[0040] The cyclone separator 1 uses multiple cone tubes 10 as separation units. Each cone tube 10 is continuously composed of a cylindrical body 11 and a cone section 12 extending along the axis of the cylindrical body 11. Structurally, the cylindrical body 11 is defined by a confining wall 111 and a windward wall 112, which together define the air inlet 113. The confining wall 111 is arranged in an arc around the axis of the cylindrical body 11. The windward wall 112 extends from the end of the confining wall 111 along the tangent direction of the confining wall 111 toward the center of the cyclone separator 1. The windward wall 112 and the front end of the confining wall 111 together spatially enclose the inlet section of the air inlet 113. To improve the adhesion and turning conditions of the airflow near the wall of the air inlet 113, a first chamfer 114 with rounded corners is formed at the front end of the enclosure wall 111, and a second chamfer 115 with rounded corners is formed at the end of the windward wall 112. The two chamfers are arranged opposite each other in the air inlet direction, so that the airflow entering the air inlet 113 undergoes smooth guidance before being guided by the windward wall 112 and the enclosure wall 111.

[0041] The arc-shaped trajectory of the enclosure wall 111 provides wall-hugging guidance for the airflow. The first chamfer 114 reduces the sharp edge effect and local discontinuities on the airflow-facing side, weakening the tendency of airflow separation. The tangential orientation of the windward wall 112 is used to establish a stable tangential velocity component, and the second chamfer 115 can shape the direction and velocity of the airflow. The continuous curvature region formed between the two chamfers is equivalent to a smooth, gradually changing inlet section, allowing a larger proportion of the airflow energy at the air inlet 113 to be converted into ordered tangential momentum rather than disordered turbulence.

[0042] The dust-laden airflow enters the conical section 12 along the cylindrical section 11, and is driven by centrifugal force to migrate towards the wall side and move downward along the inner wall of the conical section 12. The rising backflow formed in the axial region is discharged along the central path. Since the airflow has already completed tangential and wall-attached guidance at the air inlet 113, the axial straight-through component is suppressed, and short-circuit flow is unlikely to form between the air inlet 113 and the riser pipe 44, thereby reducing the probability of short-circuit discharge of the dust-laden airflow.

[0043] In one exemplary embodiment, please refer to Figure 1 and Figure 2 As shown, along the air intake direction of the air inlet 113, the distance between the first chamfered portion 114 and the second chamfered portion 115 gradually decreases. This change in distance makes the air inlet 113 as a whole form a funnel-shaped structure with a gradually converging opening along the air intake direction.

[0044] The relative positions of the first chamfered portion 114 and the second chamfered portion 115 define the side boundary of the air inlet 113. The distance between the two is larger at the inlet end of the air inlet 113 and gradually decreases towards the interior of the cylinder portion 11. This gradual relationship ensures that the air inlet 113 is not a channel of constant width, but rather has a gradually converging geometric shape. The resulting convergent channel avoids the abrupt contraction caused by abrupt cross-section changes and weakens the adverse pressure gradient caused by excessively rapid convergence.

[0045] By introducing a gradually decreasing spacing to create a variable flow channel, similar to the Venturi tube effect, the airflow velocity distribution is smoothed and the inlet kinetic energy loss is reduced. The first chamfer 114 softens the streamlined transition at the front end of the containment wall 111, preventing the formation of separation bubbles at the wall surface. The second chamfer 115 optimizes the flow field connection at the end of the windward wall 112, avoiding stagnation and accumulation of airflow in that area. The gradual reduction in the spacing between the two further enhances this effect, causing the airflow to undergo an acceleration process before entering the cylinder section 11, increasing the tangential velocity component, and suppressing lateral diffusion.

[0046] Since there are no acute-angled folds or cross-sectional steps between the first chamfered portion 114 and the second chamfered portion 115, the boundary layer within the inlet 113 adheres and flows along a continuous curvature surface. The airflow does not separate prematurely at the edge of the inlet 113, and the axial momentum in the airflow is converted into a higher proportion of tangential momentum in the tapering region. This allows the airflow to quickly establish a stable vortex after entering the cylinder portion 11. The tapering profile also homogenizes the velocity. When the upstream airflow velocity distribution becomes uneven due to fluctuations in operating conditions or disturbances in upstream components, the convergent channel guides the airflow through tapering, stretching the low-velocity region near the wall and re-matching it with the mainstream region, thus weakening the formation of backflow.

[0047] In one exemplary embodiment, please refer to Figure 1 and Figure 2 As shown, multiple cone tubes 10 are arranged sequentially around the center of the cyclone separator 1, and the distance from the air inlet 113 of each cone tube 10 to the center of the cyclone separator 1 is equal.

[0048] Multiple conical tubes 10 are arranged sequentially around the center of the cyclone separator 1, forming a concentric ring array. The distance from the air inlet 113 of each conical tube 10 to the center is consistent, which can be equivalently understood as the geometric center of the air inlet 113 of each conical tube 10 falling on the same circumference. This geometric relationship gives the circumferential layout of the conical tubes 10 a certain radial symmetry and angular balance. The path from any conical tube 10 to the center of the cyclone separator 1 is approximately consistent with the local boundary conditions, and the static pressure field from the upstream airflow tends to be isobaric in the circumferential direction. For multiple conical tubes 10 operating in parallel, the equidistant distance between the air inlet 113 and the center not only unifies the circumferential pressure boundary, but also unifies the angle of attack and tangential establishment conditions of the inlet airflow, avoiding the acquisition of additional dynamic pressure by a conical tube 10 that is closer to the center or the upstream mainstream, and suppressing flow deviation.

[0049] Specifically, please refer to Figure 2 As shown, multiple conical tubes 10 collectively define an inscribed circle O, with the windward wall 112 of each conical tube 10 extending to the circumference of the inscribed circle O. The multiple conical tubes 10 in the cyclone separator 1 collectively define an inscribed circle O through the outer contour of their cylindrical sections 11. This inscribed circle O serves as a geometric boundary, ensuring that the overall structure forms a compact annular array. The cylindrical section 11 of each conical tube 10 has the arcuate wall of the confining wall 111 as its outer side, while the windward wall 112 extends inward from the end of the confining wall 111. This configuration ensures that when multiple conical tubes 10 are arranged around the center of the cyclone separator 1, the end position of their windward wall 112 is aligned with the circumference of the inscribed circle O.

[0050] The inscribed circle O is a circular trajectory formed by the inner edges of each cylindrical section 11. The extension length of the windward wall 112 of each cone tube 10 is designed to just touch the circumference of the inscribed circle O. Considering the airflow distribution requirements of multiple cone tubes 10 connected in parallel, if the windward wall 112 is not extended enough, gaps may appear in the central area, causing airflow to leak from unexpected paths and weakening the swirling intensity; conversely, if the extension is too long, it may interfere with the air inlet 113 of adjacent cone tubes 10, causing local obstruction.

[0051] In one exemplary embodiment, please refer to Figure 1 and Figure 2 As shown, multiple cone tubes 10 are arranged in pairs in a mirror symmetrical manner. The cylindrical part 11 of the two mirror symmetrical cone tubes 10 can guide the airflow to form vortices with opposite rotation directions.

[0052] Multiple cone tubes 10 are arranged in a ring around the center of the cyclone separator 1, and are configured in pairs in a mirror image configuration. Within each pair, two cone tubes 10 are symmetrical about the radial cross-section of the cyclone separator 1, and their cylindrical sections 11 are mirror images of each other, ensuring that the tangential inlet directions of the cone tube 10's air inlets 113 are mirror-symmetrical. This creates vortices with opposite rotational directions within each cylindrical section 11. The two opposing internal swirling airflows from the two mirror-symmetrical cone tubes 10 converge and superimpose after being discharged through the riser pipe, neutralizing the angular momentum of the two internal swirling airflows. Their opposing rotational directions cancel out residual vortices.

[0053] Please refer to Figure 3 As shown, this disclosure also provides a dust collection device, which includes a dust cup 2, a primary separation component 3, a secondary separation component 4, and a fan 5. The dust cup 2 has a receiving cavity 21 and an air inlet 22 communicating with the outside. The primary separation component 3 is disposed in the receiving cavity 21. The primary separation component 3 includes a cyclone cone 31 and a filter screen 32 and a guide pipe 33 arranged axially within the cyclone cone 31. The air inlet channel of the cyclone cone 31 communicates with the air inlet 22. The filter screen 32 forms an overflow channel 34 communicating with the guide pipe 33, so that the airflow in the cyclone cone 31 can be discharged through the overflow channel 34 along the guide pipe 33. The secondary separation assembly 4 includes a mounting base 41 and the aforementioned cyclone separator 1. The mounting base 41 includes an air inlet space 413 communicating with the guide pipe 33. The cyclone separator 1 is disposed in the air inlet space 413, so that the airflow discharged from the guide pipe 33 can enter the air inlet 113 of each cone tube 10 of the cyclone separator 1 through the air inlet space 413. The fan 5 is used to provide negative pressure to the primary separation assembly 3 and the secondary separation assembly 4.

[0054] This dust collection device uses a dust cup 2 as its outer shell. A receiving cavity 21 is formed inside the dust cup 2, and an air inlet 22 is provided on its side wall. The dust-laden airflow enters the primary separation component 3 through the air inlet 22. The primary separation component 3 uses a cyclone cone 31 as its core component. The air inlet channel of the cyclone cone 31 is connected to the air inlet 22, allowing the airflow to acquire a tangential component and form a vortex upon entering the cyclone cone 31, thus achieving primary separation of particles. A filter screen 32 and a guide pipe 33 are arranged inside the cyclone cone 31 along its axial direction. The filter screen 32 forms an overflow channel 34. The airflow separated by the cyclone within the cyclone cone 31 passes through the filter screen 32 and flows into the overflow channel 34, then is discharged upwards along the axial direction under the guidance of the guide pipe 33. The filter screen 32 in this flow path functions to trap large particles, preventing fiber clumps and flaky impurities from rising with the airflow, reducing the burden on subsequent classification units. The outlet of the guide pipe 33 is connected to the air inlet space 413 inside the mounting base 41. The mounting base 41 is arranged above the first-stage separation component 3 along the axial direction of the cyclone cone 31. The air inlet space 413 serves as a buffer cavity for airflow distribution and pressure equalization, distributing the airflow from the guide pipe 33 to each cone pipe 10 of the cyclone separator 1.

[0055] The cyclone separator 1 of the secondary separation component 4 is arranged in the air inlet space 413. The cyclone separator 1 is composed of multiple cone tubes 10. The air inlet 113 of each cone tube 10 is open relative to the air inlet space 413, so that the airflow discharged from the guide pipe 33 is evenly distributed to the air inlet 113 of each cone tube 10 after pressure equalization in the air inlet space 413. Then, secondary cyclone separation is performed in each cone tube 10. Since the air inlet space 413 can adjust the airflow pressure and velocity, the tangential component and volumetric flow rate of the airflow entering each cone tube 10 are more consistent, which can reduce the air distribution deviation of each cone tube 10 and avoid short-circuit surge and efficiency fluctuation caused by excessive load on individual cone tubes 10.

[0056] The fan 5 acts as a negative pressure source, providing a stable negative pressure field by forming a suction path connected to the internal cavity of the dust cup 2, the primary separation component 3, and the secondary separation component 4. The establishment of this negative pressure field causes the dust-laden airflow to advance sequentially along the path of the inlet 22, cyclone cone 31, filter screen 32, overflow channel 34, guide pipe 33, air intake space 413, and each cone tube 10 of the cyclone separator 1. The cyclone cone 31 first performs primary cyclone separation, separating most of the particles to reduce the dust content in the airflow. The filter screen 32 intercepts large particles in the airflow after primary cyclone separation. The overflow channel 34 collects the separated airflow and guides it to the guide pipe 33. The guide pipe 33 discharges the airflow and sends it into the air intake space 413. Through the air intake space 413, the airflow is distributed to each cone tube 10 of the cyclone separator 1. Each cone tube 10 of the cyclone separator 1 then performs secondary cyclone separation to capture small-diameter particles in the airflow.

[0057] In one exemplary embodiment, please refer to Figure 3 and Figure 4 As shown, the guide pipe 33 includes a small pipe section 331 and a large pipe section 332 extending from the outlet end of the small pipe section 331. The inlet end of the small pipe section 331 is connected to the overflow channel 34, and the large pipe section 332 is connected to the air inlet space 413. The diameter of the large pipe section 332 is larger than the diameter of the small pipe section 331.

[0058] The exhaust channel of the guide pipe 33 is composed of a small pipe section 331 and a large pipe section 332 extending from the outlet end of the small pipe section 331, which are connected axially to form a continuous exhaust channel. The inlet end of the small pipe section 331 is connected to the overflow channel 34. The airflow passing through the filter screen 32 is collected by the overflow channel 34 and then constricted by the small pipe section 331 into a near-axial flow. The small cross-section helps to suppress the lateral pulsation and local vortex downstream of the filter screen 32. The small pipe section 331 plays a role in constraining and guiding the airflow, and stably transports the airflow downstream.

[0059] The large duct section 332 is connected to the air inlet space 413 and has a larger diameter than the small duct section 331. The enlarged channel serves to diffuse and decelerate the airflow. After the airflow enters the large duct section 332, the increased cross-sectional area leads to a decrease in average flow velocity, which weakens the impact of the airflow scouring the mounting base 41 and prevents the formation of eddies due to airflow impact. As a buffer transition section between the guide pipe 33 and the air inlet space 413, the large duct section 332 also plays a role in homogenizing the airflow velocity and balancing the pressure field, resulting in a flatter velocity distribution of the airflow entering the air inlet space 413.

[0060] In one exemplary embodiment, please refer to Figure 3 and Figure 5 As shown, the mounting base 41 includes a first housing 411 and a second housing 412 surrounding the outer periphery of the first housing 411. An air inlet space 413 is defined between the first housing 411 and the second housing 412. A plurality of cone tubes 10 of the cyclone separator 1 surround the outer periphery of the first housing 411. The first housing 411 has a mounting cavity 414 for accommodating the fan 5.

[0061] The mounting base 41 adopts a coaxial layered shell structure. The first shell 411 is located in the central area, and the second shell 412 is arranged around the outer periphery of the first shell 411. The two are separated by a continuous circumferential gap to form an air inlet space 413. Multiple cone tubes 10 of the cyclone separator 1 are arranged in a ring around the outer periphery of the first shell 411, and the air inlet 113 opens towards the air inlet space 413. An installation cavity 414 is opened inside the first shell 411, and the fan 5 is fixedly installed in the installation cavity 414. The second shell 412 and the first shell 411 are rigidly connected by radial reinforcing ribs, so that the air inlet space 413 has a uniform cross section and stable boundary in the circumferential direction. Since the fan 5 is placed in the central area surrounded by the ring array of cone tubes 10, the internal space of the cyclone separator 1 is efficiently utilized, resulting in a more compact structural arrangement.

[0062] Specifically, please refer to Figure 3 and Figure 5 As shown, an annular positioning rib 415 is provided between the first housing 411 and the second housing 412. The positioning rib 415 is airtightly connected to the top edge of the dust cup 2. The positioning rib 415 is provided with a plurality of positioning holes 416 arranged circumferentially along the positioning rib 415. The outlet 13 of each cone tube 10 passes through and is fixed in the positioning hole 416.

[0063] Positioning ribs 415 are circumferentially positioned between the first housing 411 and the second housing 412. The inner edge of the positioning ribs 415 is adjacent to the outer periphery of the first housing 411, and the outer edge is integrally formed with or fixed to the inner periphery of the second housing 412, ensuring that the embedding of the positioning ribs 415 does not affect the flow of air in the air inlet space 413. The positioning ribs 415 are connected to the top edge of the dust cup 2 through an airtight connection. As a circumferential reference component, the positioning ribs 415 have positioning holes 416 formed in their circumferential direction. The outlets 13 of each cone tube 10 pass through and are fixed in the positioning holes 416, and a positioning relationship is formed between the end of the outlet 13 and the wall of the positioning hole 416.

[0064] Further, please refer to Figure 3 and Figure 5 As shown, the outer periphery of the positioning rib 415 is integrally formed on the second housing 412, and the inner periphery of the positioning rib 415 protrudes from the guide tube 33 to form a flange 417. The flange 417 has an annular gap 418 between it and the first housing 411 and is airtightly connected to the large tube 332 to guide the airflow discharged from the guide tube 33 to the air inlet space 413.

[0065] The outer periphery of the positioning rib 415 is connected to the second housing 412 through an integral molding process, which ensures that the positioning rib 415 and the second housing 412 form a seamless integral structure. The inner periphery of the positioning rib 415 protrudes towards the guide pipe 33 and forms a flange 417. The inner side of the flange 417 is airtightly connected to the large pipe section 332 to form a stable sealing interface, so that the flow discharged from the guide pipe 33 enters the downstream without bypassing the bypass.

[0066] An annular gap 418 is formed between the flange 417 and the first housing 411. The annular gap 418 is coaxially arranged with the large tube 332 and the cross section is consistent along the circumference. The annular gap 418 serves as a channel from the outlet of the large tube 332 to the air intake space 413, guiding the airflow discharged from the guide pipe 33 to the air intake space.

[0067] Furthermore, please refer to Figure 3 to Figure 5 As shown, the outer peripheral surface of the large tube 332 extends outward along its radial direction to form a partition 333 that is airtightly connected to the inner wall of the dust cup 2. The partition 333, together with the flange 417, the positioning rib 415 and the top edge of the dust cup 2, defines the dust collection space 42. The outlet 13 of each cone tube 10 passes through the positioning hole 416 and extends to the dust collection space 42.

[0068] The outer peripheral surface of the large tube 332 extends horizontally outward in a radial direction to form an annular baffle 333. This baffle 333 starts from the upper part of the large tube 332 and extends outward to the inner wall of the dust cup 2. It is tightly fitted to the inner wall of the dust cup 2 through an airtight connection, which can be achieved using an embedded groove or sealant process to ensure a gapless seal and prevent dust particles or airflow from passing through. The top surface of the baffle 333, the outer peripheral surface of the flange 417, the bottom surface of the positioning rib 415, and the inner peripheral surface of the top edge of the dust cup 2 together define the dust collection space 42. This dust collection space 42 is located below the mounting base 41 and above the dust cup 2, and is used to collect the dust separated by the cyclone separator 1.

[0069] The outlet 13 of each cone tube 10 of the cyclone separator 1 extends downwards, and after being fixed through the positioning holes 416 on the positioning ribs 415, it extends further into the dust collection space 42. This extension length is designed to exceed the lower surface of the positioning ribs 415 to ensure that the end of the outlet 13 directly faces the bottom of the dust collection space 42. After the dust-laden gas completes two-stage cyclone separation through each cone tube 10, it enters the dust collection space 42 from the outlet 13 through the positioning holes 416. The dust settles and is collected in the dust collection space 42 under the action of gravity.

[0070] In one exemplary embodiment, please refer to Figure 3 As shown, the bottom of the first housing 411 is provided with a conical part 419 coaxial with the guide tube 33 and protruding into the large tube 332. The conical part 419 is used to guide the airflow discharged from the small tube 331 to the periphery of the large tube 332.

[0071] The conical section 419 is conical in shape, directly facing the outlet center of the small tube section 331. The conical surface of the conical section 419 gradually widens outward from the tip, and the protrusion depth of the conical section 419 is designed to be close to the outlet position of the small tube section 331, ensuring that the airflow can contact the surface of the conical section 419 after exiting the small tube section 331. The large tube section 332 serves as an extension of the guide tube 33, and its inner cavity accommodates the protrusion of the conical section 419. The small tube section 331 serves as the inlet section of the guide tube 33, and its outlet end is seamlessly connected to the inlet end of the large tube section 332, forming a continuous channel for airflow from narrow to wide.

[0072] The outlet of the small tube 331 is aligned with the tip of the conical section 419 to ensure that the deflection process is symmetrical in the circumferential direction and does not produce unilateral flow deviation. The periphery of the large tube 332, guided by the conical section 419, slides along the inner wall of the large tube 332 and then reaches the inner region of the flange 417 and is evenly discharged into the air intake space 413 at the annular gap 418. The annular gap 418 therefore receives the airflow that has completed radial widening and velocity reduction, and the circumferential supply is closer to the state of isobaric and equal quantity, which is beneficial to the consistency of air distribution in each conical tube 10.

[0073] Specifically, please refer to Figure 3 andFigure 4 As shown, the inlet end of the small tube 331 is provided with a baffle portion 334 extending radially and axially along the small tube 331. The baffle portion 334 is used to make the airflow tend to flow along the axial direction of the small tube 331. The radial extension of the baffle portion 334 provides radial division, dividing the inlet end of the small tube 331 into two sub-channels, while the axial extension extends the rectification distance, ensuring that the airflow gradually stabilizes during flow.

[0074] The baffle portion 334 at the inlet end of the small tube 331 mainly serves to rectify the flow. Its radial and axial extension functions are to divide and guide the airflow entering from the overflow channel 34, so that the airflow tends to flow along the axial direction of the small tube 331. This guidance constrains the lateral movement of the airflow through the baffle portion 334, so that the airflow tends to advance along the axial direction of the small tube 331, avoiding the formation of vortices in the small tube 331, thereby maintaining the stability of the airflow.

[0075] In one exemplary embodiment, please refer to Figure 3 As shown, the primary separation component 3 also includes a dust collection bin 35 that is connected to the cyclone cone 31. The bottom end of the cyclone cone 31 extends into the dust collection chamber 351 of the dust collection bin 35, and the bottom side wall of the cyclone cone 31 is provided with a dust discharge port 311 that communicates with the dust collection chamber 351.

[0076] The bottom end of the cyclone cone 31 is inserted into the dust collection chamber 351 of the dust collection bin 35, and the interface is designed to be airtight along the circumference. The dust collection chamber 351 serves as a space for particle deposition and temporary storage. A dust discharge port 311 is opened on the bottom side wall of the cyclone cone 31 and is connected to the dust collection chamber 351. The dust discharge port 311 adopts a side opening method, which avoids the garbage deposition area at the bottom of the dust collection chamber 351. The normal direction of the opening does not directly point to the dust deposition area at the bottom of the dust collection chamber 351, so as to avoid forming a positive impact on the deposited dust when residual gas escapes during dust discharge.

[0077] The bottom of the cyclone cone 31 extends a certain distance into the dust collection chamber 351, causing the dust discharge port 311 and the bottom deposition area of ​​the dust collection chamber 351 to be misaligned in height and direction. After centrifugal separation, dust particles slide down the inner wall of the cyclone cone 31 and fall laterally into the dust collection chamber 351 from the dust discharge port 311. The lateral opening of the dust discharge port 311 decomposes the emission momentum into a tangential component along the side wall of the dust collection chamber 351. The airflow escaping from the dust discharge port 311 is dispersed to the circumference of the dust collection chamber 351. The bottom area of ​​the dust collection chamber 351 maintains a relatively stable static pressure zone, which is conducive to the gravity settling and stable accumulation of dust, and avoids dust re-entrainment and dust return.

[0078] In one exemplary embodiment, please refer to Figure 3As shown, the secondary separation assembly 4 also includes a wind cone cover 43 covering the top of the cyclone separator 1. The wind cone cover 43 is provided on a plurality of air risers 44 corresponding to each cone tube 10 of the cyclone separator 1. The air risers 44 extend into the cone tube 10 along the axis of the cone tube 10 so that the airflow in the cone tube 10 can be discharged from the air risers 44.

[0079] The wind cone cover 43 covers the upper opening of the cyclone separator 1 and forms an airtight upper boundary with the mounting base 41. Multiple riser pipes 44 are integrally installed inside the cover, their number corresponding to the lower cone pipe 10, and are coaxially aligned one by one. The lower opening of each riser pipe 44 is inserted into the corresponding cone pipe 10 along its axial direction. The insertion depth of the riser pipe 44 is designed to reach the junction area between the cylinder section 11 and the cone section 12 or deeper, ensuring that the lower end of the riser pipe 44 is located in the cyclone center path, forming a channel for upward exhaust from inside the cone pipe 10.

[0080] This disclosure also provides a cleaning device, which includes a main unit and the aforementioned dust collection device, wherein the dust collection device is detachably installed on the main unit. The main unit is equipped with internal components such as a power supply, control circuit, and drive motor, and has an external mounting interface, which is typically slot-shaped or snap-fit, and matches the corresponding connection part of the dust collection device. The main unit serves as a base, and its mounting interface abuts against the bottom or side of the dust collection device's housing, forming both mechanical and electrical connections.

[0081] In summary, the cyclone separator, dust collection device, and cleaning equipment provided in this disclosure form a tangential air inlet by means of the enclosure wall and the windward wall of the cyclone separator cone tube. A first chamfer and a second chamfer with rounded transition are provided at the front end of the enclosure wall and the end of the windward wall, so that the air inlet forms a gradually changing inlet with continuous curvature. When the airflow enters the cone tube from the air inlet, it can turn along the wall, reducing the resistance gradient and velocity change when the airflow enters, thereby suppressing the generation of eddies and reducing the probability of dust-laden airflow being short-circuited and discharged from the riser pipe.

[0082] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0083] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cyclonic separator characterised in that, The cyclone separator comprises a plurality of cone tubes, each of which comprises a cylinder part and a cone part extending from the cylinder part along an axis of the cylinder part; the cylinder part comprises an enclosing wall, a windward wall, and an air inlet; the enclosing wall is arc-shaped around the axis of the cylinder part; the windward wall extends from an end of the enclosing wall along a tangent direction of the enclosing wall towards the center of the cyclone separator; and the windward wall and the front end of the enclosing wall define the air inlet. In the air inlet direction of the air inlet, the front end of the enclosing wall forms a first chamfer part with a round corner transition, and the end of the windward wall forms a second chamfer part with a round corner transition.

2. The cyclone separator of claim 1, wherein In the air inlet direction of the air inlet, the distance between the first chamfer part and the second chamfer part gradually decreases.

3. The cyclone separator of claim 1, wherein The plurality of cone tubes are arranged in sequence around the center of the cyclone separator, and the distance from the air inlet of each cone tube to the center of the cyclone separator is equal.

4. The cyclone separator of claim 3, wherein The plurality of cone tubes jointly define an inscribed circle, and the windward wall of each cone tube extends to the circumference of the inscribed circle.

5. The cyclone separator of claim 1, wherein The plurality of cone tubes are arranged in mirror symmetry, and the cylinder parts of the two mirror-symmetrical cone tubes can guide airflow to form vortexes with opposite rotation directions.

6. A dust collecting apparatus characterized by comprising: The cyclone separator comprises: a dust cup having a receiving cavity and an air inlet communicating with the outside; a primary separation assembly arranged in the receiving cavity, the primary separation assembly comprising a cyclone cone, a filter screen arranged in the cyclone cone along an axial direction of the cyclone cone, and a flow guide pipe, an air inlet passage of the cyclone cone communicating with the air inlet, the filter screen being enclosed to form an overflow passage communicating with the flow guide pipe, so that airflow in the cyclone cone can be discharged along the flow guide pipe through the overflow passage; a secondary separation assembly comprising a mounting seat and a cyclone separator as claimed in any one of claims 1 to 4, the mounting seat comprising an air inlet space communicating with the flow guide pipe, the cyclone separator being arranged in the air inlet space, so that airflow discharged from the flow guide pipe can enter the air inlets of the cone tubes of the cyclone separator through the air inlet space; a fan for providing negative pressure to the primary separation assembly and the secondary separation assembly.

7. The dust collecting device according to claim 6, wherein The flow guide pipe comprises a small pipe part and a large pipe part extending from an outlet end of the small pipe part, an inlet end of the small pipe part communicating with the overflow passage, and the large pipe part communicating with the air inlet space, the diameter of the large pipe part being greater than that of the small pipe part.

8. The dust collecting device according to claim 6, wherein The mounting seat comprises a first shell and a second shell arranged around the periphery of the first shell, the first shell and the second shell defining the air inlet space therebetween, the plurality of cone tubes of the cyclone separator being arranged around the periphery of the first shell, and the first shell having a mounting cavity for accommodating the fan.

9. The dust collecting device according to claim 8, wherein An annular positioning rib is arranged between the first shell and the second shell, the positioning rib being airtightly connected to the top edge of the dust cup, the positioning rib being provided with a plurality of positioning holes arranged in the circumferential direction of the positioning rib, and the discharge outlets of the cone tubes being arranged in and fixed to the positioning holes.

10. The dust collecting device according to claim 9, wherein The outer periphery of the positioning rib is integrally formed with the second shell, and the inner periphery of the positioning rib protrudes from the guide pipe to form a flange, and the flange has an annular gap with the first shell and is in airtight connection with the large pipe portion to guide the airflow discharged from the guide pipe to the air inlet space.

11. The dust collecting device according to claim 10, wherein An outer peripheral surface of the large pipe portion extends radially outward to form a partition portion in airtight connection with the inner side wall of the dust cup, and the partition portion, the flange, the positioning rib and the top edge of the dust cup jointly define a dust collection space, and the exhaust port of each conical pipe extends through the positioning hole and into the dust collection space.

12. The dust collecting device according to claim 8, wherein The bottom of the first shell is provided with a conical surface portion coaxial with the guide pipe and protruding into the large pipe portion, and the conical surface portion is used to guide the airflow discharged from the small pipe portion to the periphery of the large pipe portion.

13. The dust collecting apparatus according to claim 12, wherein The inlet end of the small pipe portion is provided with a baffle portion extending radially and axially along the small pipe portion, and the baffle portion is used to make the airflow tend to flow axially along the small pipe portion.

14. The dust collecting device according to claim 6, wherein The primary separation assembly further comprises a dust collection bucket in airtight connection with the cyclone cone, the bottom end of the cyclone cone extends into a dust collection cavity of the dust collection bucket, and the bottom end side wall of the cyclone cone is provided with a dust exhaust port in communication with the dust collection cavity.

15. A cleaning apparatus, characterized by The dust collection device as claimed in any one of claims 6 to 14 is detachably mounted on the main machine. The dust collection device as claimed in any one of claims 6 to 14 is detachably mounted on the main machine.

Images