CN114788661A - Cyclone separation structure, cyclone separator, cyclone separation device and dust collector - Google Patents

Abstract

The cyclone separation structure, the cyclone separator, the cyclone separation device and the dust collector comprise a separation cone with a truncated cone-shaped rotating cavity, wherein the upper end part of the separation cone is a big cone end and is provided with a cut-in port, and the cut-in port is used for allowing external air to enter; the rotary cavity comprises a cylindrical shell, a plurality of rotary cavities are annularly arranged on the inner side of the cylindrical shell, partial cylindrical shell forms partial separation cones of the rotary cavities, and a plurality of separation cones surround to form a central channel; further comprising a stopper blocking the upper port of the separation cone to allow the gas flow in the rotation chamber to flow downwardly out of the separation cone portlets into the central channel; a cyclone separation device comprises a dust cup and a cup cover, wherein an opening is formed in the upper portion of the dust cup, and the cup cover is detachably covered on the opening; also comprises a dust collector comprising the cyclone separation device.

Description

Cyclone separation structure, cyclone separator, cyclone separation device and dust collector

Technical Field

The invention relates to the technical field related to cleaning appliances, in particular to a cyclone separation structure, a cyclone separator, a cyclone separation device and a dust collector.

Background

The vacuum cleaner has the characteristics of strong cleaning capability and convenient use, so that the vacuum cleaner is used as a cleaning appliance commonly used by people, and meanwhile, the vacuum cleaner is continuously improved to improve the cleaning capability, for example, the air-dust separation efficiency is improved by improving an air-dust separation structure. The common air-dust separation structure is a filter screen, dust with different sizes in the intercepted air can be changed by adjusting the density of the filter screen, the interception effect of the dust can be improved by using the high-density filter screen, but the accumulated dust can block air holes of the filter screen and enable an air flow channel to generate larger pressure drop, so that the efficiency of the dust collector is reduced. The cyclone separation structure is used as a filtering structure with zero material consumption, and therefore people generally arrange the cyclone separation structure at the upstream of the high-density filter screen to prolong the service life of the high-density filter screen.

As shown in fig. 1, a conventional cyclone separation structure is provided, which is to make dust and air rotate at high speed in a cone-shaped cyclone cylinder, and to make the dust with higher density to be thrown outwards onto the cylinder wall and slide downwards along the cylinder wall by using the centrifugal force of rotation and to be discharged from a dust outlet at the lower part. For example, the chinese patent publication No. CN101049221A discloses a cyclone separating device for a vacuum cleaner, which comprises a cyclone cylinder, wherein the cyclone cylinder is provided with an airflow inlet and an airflow outlet, and an inner cavity of the cyclone cylinder forms a cyclone separating chamber. As can be seen from fig. 1, both the airflow outlet and the airflow inlet of the cyclone separation device are arranged at the large end of the cyclone cylinder, the airflow flowing in from the airflow inlet rotates downwards along the cylinder wall to form an outer layer rotational flow, and the outer layer rotational flow turns back upwards to flow to the airflow outlet after flowing to the cone bottom; the cyclone separation device guides airflow to form a turning-back flow path, the outer layer rotational flow and the inner layer rotational flow are easy to interfere, and the resistance of an air duct of the cyclone separation device is increased to a certain extent by the locally generated rotational flow, so that the air-dust separation efficiency of the cyclone separation device is influenced.

Disclosure of Invention

In order to further reduce the resistance of an air duct of the cyclone separation device and improve the gas-dust separation efficiency, the invention provides a cyclone separation structure, which comprises a separation cone with a truncated cone-shaped rotating cavity, wherein the upper end part of the separation cone is a cone large end and is provided with a cut-in port, and the cut-in port is used for allowing external air to enter; the separation cone is characterized in that a separation blade is arranged at the lower part of the separation cone, and the separation blade is positioned at the outer side of the small port of the separation cone when viewed from the central axis direction of the rotary cavity; the separation blade has the windward side that can meet rotatory wind, and the small port edge of separation cone extends downwards to the windward side of separation blade moreover.

The separation cone is a main body part of the cyclone separation structure and is provided with a conical side wall forming the truncated cone-shaped rotating cavity, the upper end part of the separation cone is a cone large end, the lower end part of the separation cone is a cone small end, and the lower end part of the separation cone is provided with a small port which is a structure for accelerating the rotation of airflow. Of course, the up-down direction is only used for distinguishing two ends of the separation cone, and the placing direction of the separation cone in a specific application is not limited, for example, in one embodiment, the separation cone is inverted, the upper end part is a cone small end and is provided with a small port, and the lower end part is a cone large end and is provided with the cutting opening. Furthermore, the conical large end of the separation cone can also be provided with a section of a straight cylinder wall, which facilitates the arrangement of the cutting opening on the straight cylinder wall.

Wherein the small port is an opening of the rotating cavity for discharging the airflow outwards, namely the flow path of the airflow passing through the separation cone is as follows: external air enters from the cut-in opening at the upper end part of the separation cone, the air entering the rotating cavity rotates downwards along the side wall of the separation cone to form rotating airflow, and the rotating airflow can be discharged from the small port of the separation cone.

The baffle plate is a component for blocking dust discharged from the small port of the separation cone, because the dust and air have different densities, when the rotating airflow carries the dust to be discharged from the small port of the separation cone, the dust is thrown outwards along the tangential direction of the small port under the centrifugal action force, the baffle plate arranged at the outer side of the small port of the separation cone is just arranged on the path where the dust is thrown out, and the dust is blocked by the baffle plate and slides downwards along the windward side of the baffle plate, so that the gas-dust separation is realized.

The windward surface of the baffle plate extends downwards to form a small port edge of the separation cone, dust is thrown outwards along the tangential direction of the small port after the rotating airflow is separated from the small port edge of the separation cone, and meanwhile the baffle plate also moves downwards along the axial direction of the rotating cavity under the action of inertia force, and the baffle plate extends downwards adaptively to better block the dust so as to realize gas-dust separation.

The separation blade is located on the outer side of the small port of the separation cone when viewed from the central axis direction of the rotating cavity, namely the separation blade extends along the radial direction of the rotating cavity, but the projection of the separation blade along the central axis direction of the rotating cavity does not fall into the small port of the separation cone.

The windward side of the baffle plate is a surface on the baffle plate for blocking dust from moving, the windward side is changed according to the structure of the baffle plate, taking the baffle plate as a thin flat plate as an example, and the windward side refers to one or more side planes of the baffle plate; when the baffle plate is in a curved plate shape or one side of the baffle plate is in a curved surface shape, the windward side refers to the curved side surface of the baffle plate. Furthermore, when one baffle is connected to the two separation cones, the front side and the back side of the baffle can be respectively used as the windward sides of the two separation cones.

According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that:

firstly, wind entering from the cutting opening forms rotating wind in the rotating cavity and then carries dust to be discharged from a small port of the separation cone, rotating airflow does not need to turn back upwards, and the airflow flowing path in the rotating cavity is single, so that compared with the prior art, the problem of vortex formed by the interference of airflows in different directions is effectively solved, the airflow resistance in the rotating cavity is reduced, and the gas-dust separation efficiency is improved;

secondly, after the rotating airflow is discharged from the small port of the separation cone, dust with higher density is separated from air under the centrifugal action force, and the baffle is arranged to block the dust so as to drop and separate the dust;

thirdly, the baffle is arranged at the outer side of the small port of the separation cone, which is not only beneficial to the windward side of the baffle to block the dust separated outwards, but also beneficial to the baffle not extending into the inner side of the small port of the separation cone, the baffle does not block the airflow in the middle, which is beneficial to reducing the formation of vortex at the middle part of the outer side of the small port so as to smoothly discharge the clean air.

In order to arrange the blocking sheet, a further technical scheme can be that the blocking sheet in a cantilever shape is connected to the side wall of the separation cone.

In order to enhance the gas-dust separation efficiency, the cyclone separation structure at least comprises one baffle plate, and when a plurality of baffle plates are arranged, the baffle plates are arranged at intervals outside the small port of the separation cone.

Of course, the shape of the structure of the baffle is various, and the following description is given in several common arrangements:

firstly, the central axis of the rotating cavity is located on a geometric plane where the windward side is located, namely, the windward side extends outwards along the diameter direction of the rotating cavity when viewed from the central axis direction of the rotating cavity, and the windward side is arranged close to the small port and can well block dust flying off along the tangent line of the small port edge.

Secondly, the central axis of the rotating cavity is parallel to the windward side of the baffle plate, and the minimum distance between the geometric plane where the windward side is located and the central axis of the rotating cavity is smaller than the radius of the small port. The windward side is arranged in a manner of being offset from the central axis of the rotary cavity, but the windward side is always arranged at a position close to the small port and can extend out to form a larger windward side, and particularly when a plurality of separating cones are continuously arranged, the blocking pieces arranged in an offset manner can form a larger windward side and can block more dust flying off along the edge of the small port in a tangent manner.

And thirdly, a geometric plane on which the windward side is located passes through the small port and intersects with the central axis of the rotating cavity at a point. In addition, the dust can slide to a designated collection space along the inclined windward side, and the air-dust separation effect is improved.

In order to fully exert the gas-dust separation characteristic of the cyclone separation structure, the invention comprises a cyclone separator applying the cyclone separation structure, which comprises a cylindrical shell, a plurality of rotary cavities are annularly arranged on the inner side of the cylindrical shell, part of the cylindrical shell forms a part of separation cones of the rotary cavities, the plurality of separation cones form a central channel in a surrounding mode, the cutting opening of each separation cone faces the outer side of the cylindrical shell, and the cyclone separator further comprises a stopper which blocks an upper end opening of each separation cone so that airflow in the rotary cavities flows downwards from a small port of each separation cone to the central channel. Wherein the cylindrical shell has an annular side wall which is used for connecting a plurality of the separation cones, and part of the side wall of the annular side wall is also used as the side wall of the separation cone to reduce the volume of the cyclone separator. Furthermore, an outer side tangential air inlet channel communicated with the cylindrical shell is further arranged on the cyclone separator, the large-end cavity of the separation cone is communicated with the tangential air inlet channel through the tangential inlet, and the tangential air inlet channel is used for providing tangential airflow for the rotating cavity. The cylindrical shell separates the tangential air inlet channel and the small port of each separation cone on the outer side and the inner side, and the cylindrical shell is matched with the stopper to block the upper port. It will be understood that the gas-dust separation process: air outside the cylindrical shell enters the rotating cavity through the tangential air inlet channel, the rotating airflow accelerated by the rotating cavity is discharged from the small port, most dust particles in the airflow are separated and fall off by the baffle, and clean air is discharged upwards through the central channel. The cyclone separator increases the cross section area of the air passing channel in a limited space by increasing the number of the separation cones, and also scientifically divides the trend of the air path and the falling direction of dust separation, so that the resistance of the air channel is not increased, and the dust collection efficiency is improved.

In order to further optimize the air-dust separation air duct, in a further technical scheme, one baffle is arranged between every two adjacent separation cones, and a gap for air flow to pass through is reserved between every two adjacent baffle. The baffle plate arranged in this way is used for connecting two adjacent separating cones so as to strengthen the structural strength of the cyclone separator, and on the other hand, the baffle plate is prevented from forming separation between the small port and the central channel, so that clean air can flow to the central channel in a shorter path, and the resistance of an air duct is reduced, and the clean air and dust are mixed again.

In order to enable the blocking sheet to better block dust, in a further technical scheme, the lower end of the cylindrical shell extends out of the small port edge of the separation cone, and the blocking sheet and the cylindrical shell are arranged at intervals. A certain space distance is reserved between the blocking sheet and the cylinder shell, so that dust can move outwards for a certain distance after leaving the small port edge and then collide with the windward side of the blocking sheet to realize air-dust separation.

In order to achieve a more efficient gas-dust separation, the cyclone separator may be applied to a cyclone separating apparatus, the cyclone separation device comprises a dust cup and a cup cover, an opening is arranged at the upper part of the dust cup, the cup cover is detachably covered at the opening, a cup air inlet is arranged on the side wall of the dust cup, the cup cover is provided with a cover air outlet and also comprises a cyclone separator arranged in the dust cup, the cup cover is also covered at the upper end part of the separation cone of the cyclone separator to be used as the stopper to block the large port of the separation cone, the cup air inlet is communicated with the cut-in opening of the separation cone, the central channel of the cyclone separator is communicated with the cover air outlet, air entering from the cup air inlet can enter the rotating cavity through the cut-in opening, and air exhausted from the central channel can be exhausted out of the dust cup through the cover air outlet. Thus, the dust separated by the cyclone separating device is stored in the dust cup, and clean air is discharged from the air outlet of the cover.

In order to separate the dust gradually from coarse dust to fine dust, the dust separation device further comprises a middle barrel body arranged in the dust cup, the upper part of the middle barrel body is open, at least part of the cyclone separator is arranged in the middle barrel body, a cylindrical shell of the cyclone separator is connected with the middle barrel body to form a middle channel, a porous filter screen is arranged on the wall body of the middle barrel body, and air entering from the air inlet of the cup sequentially passes through the porous filter screen, the middle channel and the tangential air inlet and enters the rotating cavity. Through setting up porous filter screen can let the air current separate out earlier big granule dust or silk thread before getting into cyclone, effectively reduce cyclone blocks up the emergence of the condition.

In order to clean the dust in the dust cup, the dust cup further comprises a bottom cover which is rotatably hinged to the bottom of the dust cup, the lower end of the middle barrel body is open, and when the bottom cover covers the bottom of the dust cup, the lower end opening of the middle barrel body is abutted against the bottom cover.

The invention has the characteristics and advantages, so the invention can be applied to a cyclone separation structure, a cyclone separator, a cyclone separation device and a dust collector.

Drawings

FIG. 1 is a schematic illustration of a prior art cyclonic separation arrangement;

FIG. 2 is a schematic axial view of a vacuum cleaner to which the present invention is applied;

FIG. 3 is a schematic axial view of the cyclonic separating apparatus;

FIG. 4 is a schematic view of an exploded structure of the cyclonic separating apparatus;

FIG. 5 is a schematic sectional view of the cyclone separator;

FIG. 6 is a schematic axial structural view of the cyclone separator;

FIG. 7 is a schematic structural view of a cross section of the cyclone separator in a front view direction;

FIG. 8 is a schematic view of the cyclone separator in a bottom view;

FIG. 9 is a schematic axial view of the cyclone separation structure according to the present invention;

FIG. 10 is a schematic elevation sectional view of a cyclonic separation structure according to the present invention;

FIG. 11 is a first arrangement of the baffles;

FIG. 12 is a second arrangement of the baffles;

FIG. 13 is a third arrangement of the baffles;

FIG. 14 is a schematic sectional view in elevation of the cyclonic separating apparatus, showing an alternative arrangement of the cyclonic separators.

Detailed Description

The cyclone separation structure, the cyclone separator, the cyclone separation device and the dust collector applying the technical scheme of the invention are further described with reference to the attached drawings. Various implementation details disclosed below may be selectively applied or combined in one embodiment even if not directly related or synergistic in functional terms, except where expressly specified to belong to equivalent or alternative embodiments.

As shown in fig. 2, the vacuum cleaner includes the cyclone separation device 1, a dust collection head 2 and a motor assembly 3, the dust collection head 2 is disposed at the upstream of the cyclone separation device 1, the dust collection head 2 has a dust collection port and an air outlet, the air outlet of the dust collection head 2 is connected to the air inlet of the cyclone separation device 1 through a connection pipe 21, the motor assembly 3 is disposed at the rear of the cyclone separation device 1, the suction port of the motor assembly 3 is communicated with the air outlet of the cyclone separation device 1, and the motor assembly 3 sucks dust on the surface of an object by sucking air to form negative pressure at the dust collection port of the dust collection head 2.

In order to reduce the air duct resistance of the cyclone separation device 1 and improve the air-dust separation efficiency, as shown in fig. 2 to 5, for the cyclone separation device 1 provided by the present invention, the cyclone separation device 1 includes a dust cup 4 and a cup cover 5, wherein the dust cup 4 has a cup side wall 41, and further includes a bottom cover 44 rotatably hinged to the bottom of the dust cup 4, the cup side wall 41 and the bottom cover 44 define a cup cavity 40 of the dust cup, an opening is provided at the upper portion of the dust cup 4, the dust cup 4 is provided with a cup air inlet 42, in order to guide external air to tangentially enter the cup cavity 40, the cup side wall 41 is further provided with a cup tangential channel 43, and the cup tangential channel 43 is communicated with the cup cavity 40 through the cup air inlet 42, so that the external air can tangentially enter the cup cavity 40 along the cup tangential channel 43. The cup cover 5 is detachably covered at the opening, a cover air outlet 50 is formed in the cup cover 5, and air in the cup cavity 40 can be discharged outwards from the cover air outlet 50 after being filtered. In this embodiment, the airflow entering tangentially into the cup cavity 40 is generally mixed with a large amount of dirt, and the airflow flows along the cup sidewall 41 to form a rotating airflow, and the heavier dirt and dust will slide down the cup sidewall 41 to the bottom of the dirt cup 4.

The general gas-dust separation process is to separate the dust step by step from coarse to fine, and for this reason, a middle barrel body 6 is further arranged in the dust cup 4, the funnel-shaped diameter of the upper part of the middle barrel body 6 is larger than that of the lower part, the upper part and the lower part of the middle barrel body 6 are both in an open shape, the upper part of the middle barrel body 6 is connected with the cup cover 5, when the bottom cover 44 covers the bottom of the dust cup 4, the lower end opening of the middle barrel body 6 is propped against the bottom cover 44, and the cup side wall 41 and the middle barrel body 6 form an outer dust collection cavity. Further, a porous screen 61 is provided on a wall body of the middle tub 6, so that air introduced from the cup inlet 42 can enter the inner space of the middle tub 6 through the porous screen 61 after being primarily rotated and separated, and dust having a diameter size larger than the meshes of the porous screen 61 is intercepted in the outer dust collecting chamber.

After being filtered by the porous screen 61, the large-particle dust in the airflow is intercepted, and in order to further separate the small-particle dust in the airflow, the cyclone separation device 1 further comprises a cyclone separator 7 arranged in the dust cup 4, and at least part of the cyclone separator 7 is arranged in the middle bucket body 6. The cyclone separator 7 separates dust in an air flow by using a centrifugal force generated when the air flow rotates, as shown in fig. 4 to 7, the cyclone separator 7 includes a cylindrical housing 71 and a plurality of separation cones 8 arranged annularly, each separation cone 8 has a rotation cavity 80, the plurality of rotation cavities 80 are arranged inside the cylindrical housing 71, wherein the cylindrical housing 71 is further connected to the plurality of separation cones 8, a part of the cylindrical housing 71 forms a part of the separation cone 8 of the rotation cavity 80, and the plurality of separation cones 8 surround to form a central channel 81. Each separating cone 8 comprises a rotary cavity 80 with a truncated cone shape, the upper end of the separating cone 8 is a cone large end and is provided with a cut-in port 82, the cut-in port 82 is used for allowing external wind to enter, the lower end of the corresponding separating cone 8 is a cone small end, and the end of the cone small end of the separating cone 8 is provided with a small port 83. Naturally, in order to facilitate the arrangement of the access opening 82, the upper end of the separation cone 8 can also be provided with a section of a straight cylinder wall, on which the access opening 82 is arranged. The entry 82 of each separation cone 8 is directed towards the outside of the cylindrical housing 71 and the small ports 83 communicate with the central channel 81. As shown in fig. 4, the cup cover 5 also covers the separation cone 8 of the cyclone separator 7 to serve as a stopper to block the large port of the separation cone 8, and the central channel 81 of the cyclone separator 7 is communicated with the cover air outlet 50.

In order to make the airflow form a rotating airflow in the rotating chamber 80, as shown in fig. 4, 9 and 10, an external tangential air inlet channel 72 communicating with the cylindrical housing 71 is further provided on the cyclone separator 7, the large end cavity of the separation cone 8 communicates with the tangential air inlet channel 72 through the cut-in port 82, and the tangential air inlet channel 72 is used for providing a tangential airflow to the rotating chamber 80. When entering the rotation chamber 80, the airflow will flow along the side wall of the separation cone 8 and form a rotating airflow, and the airflow rotates at an increased speed from the large end to the small end of the separation cone 8, so that the air at the lower end of the rotation chamber 80 is primarily separated from dust, i.e. dust is mainly distributed at the periphery of the rotation chamber 80 and slides downwards along the inner surface of the wall body of the separation cone 8 under the action of centrifugal force, and clean air is distributed in the middle range of the rotation chamber 80. The air flow accelerated to rotate finally exits the rotating chamber 80 through the small port 83, but the dust discharged from the small port 83 moves downward to the outside of the small port 83 due to the centrifugal force, and the clean air discharged from the small port 83 flows to a region with relatively low air pressure, and in this embodiment, the clean air flows upward along the central channel 81 as shown in fig. 5.

In order to further separate and collect the dust flying outward, a baffle plate 9 is further arranged at the lower part of the separation cone 8, and the baffle plate 9 is positioned outside the small port 83 of the separation cone 8 when viewed from the central axis direction of the rotating cavity 80; the baffle 9 has a windward side 91 capable of facing the rotating wind, and the windward side 91 of the baffle 9 extends downwards beyond the small port 83 edge of the separation cone 8. Wherein the shutter 9 is a member for blocking dust, which is disposed below the outer side of the small port 83, just as a path of movement of dust. The windward side 91 of the baffle 9 is a part of the outer surface of the baffle 9, and is a surface for changing the movement direction of dust, in this embodiment, the thin plate-shaped baffle 9 is vertically placed below the outer side of the small port 83, and the surface of the baffle 9 facing the dust is the windward side 91. Of course, this also relates to the rotation direction of the airflow in the rotation chamber 80, and if the rotation direction of the airflow changes, the corresponding windward side 91 changes accordingly. Thus, the separation cone 8 and the baffle plate 9 form a cyclone separation structure, and dust can fall down along the windward side 91 after flying out and colliding with the baffle plate 9.

Furthermore, at least one baffle plate 9 is arranged on one separation cone 8, and the baffle plates 9 are arranged at intervals outside the small port 83 of the separation cone 8. As shown in fig. 6 to 8, the two sides of the same separation cone 8 are respectively provided with one blocking piece 9, and the cantilever-shaped blocking pieces 9 are connected to the side wall of the separation cone 8. In this embodiment, the separation cones 8 are arranged in a ring shape, and one blocking plate 9 is disposed between two adjacent separation cones 8. The flaps 9 thus arranged serve on the one hand to connect two adjacent separating cones 8 and thus to reinforce the structural strength of the cyclone separator 7; on the other hand, for a single separation cone 8, the blocking sheets 9 on both sides can play a role of dust blocking, and for a plurality of separation cones, both side surfaces of each blocking sheet 9 are the windward surfaces 91; further, a gap for airflow to pass through is reserved between two adjacent baffle plates 9, so that the baffle plates 9 are reduced to form separation between the small port 83 and the central channel 81, clean air can flow to the central channel 81 through a shorter path, and resistance of an air duct is reduced, and the clean air and dust are mixed again.

The arrangement of the blocking pieces 9 is flexible and various, and taking the blocking pieces 9 as thin flat plates and the windward side 91 as a plane as an example, the arrangement of the blocking pieces is described through several specific embodiments as follows:

first, as shown in fig. 11, the central axis of the rotating cavity 80 is located on the geometric plane of the windward side 91, that is, the windward side 91 extends outward along the diameter direction of the rotating cavity 80 when viewed from the central axis direction of the rotating cavity 80, so that the baffle plate 9 arranged in this way can well block dust flying along the edge of the small port 83 as the windward side 91 at both the front side and the back side.

Secondly, as shown in fig. 12, the central axis of the rotating cavity 80 is arranged parallel to the windward side 91 of the baffle plate 9, and the minimum distance between the geometric plane of the windward side 91 and the central axis of the rotating cavity 80 is smaller than the radius of the small port 83. The windward side 91 thus arranged is arranged offset from the central axis of the rotating chamber 80, but the windward side 91 arranged relatively close to the small port 83 also provides a good barrier against dust flying along the edge of the small port 83.

Third, as shown in fig. 13, the geometric plane of the windward side 91 passes through the small port 83 and intersects the central axis of the rotating chamber 80 at a point. In this arrangement, the windward side 91 is relatively close to the small port 83, and the central axis of the rotary cavity 80 forms a certain angle with the windward side 91, so that the surface area of the windward side 91 can be increased to a certain extent to block more dust, and in addition, the dust can slide to a designated collection space along the inclined windward side 91, which is beneficial to improving the gas-dust separation effect.

Of course, the above description has been given only by taking the windward side 91 as a plane, but in actual application, the windward side 91 may be provided to have a certain curved surface shape according to an actual application environment.

In order to collect dust better, the lower end of the cylindrical shell 71 extends out of the small port 83 edge of the separation cone 8, and the lower end edge of the cylindrical shell 71 is connected with the upper barrel wall of the middle barrel 6, so that the cylindrical shell 71 and the lower barrel wall of the middle barrel 6 form a middle dust collecting cavity, and the cylindrical shell 71 and the upper barrel wall of the middle barrel 6 form a middle channel. In order to ensure the gas-dust separation effect, the baffle plate 9 is arranged at a distance from the cylinder shell.

In order to further improve the cleanliness of the air discharged from the cyclone separation device 1, a further technical scheme is that the cyclone separation device further comprises a high-density filter screen 51 arranged on the cup cover 5, and the air discharged from the cup cover air outlet 50 flows to the air suction opening of the motor assembly 3 after being filtered by the high-density filter screen 51.

In summary, it can be understood that the gas-dust separation process is as follows: the air with dust enters from the dust suction port of the dust suction head 2 and flows along the connecting pipe 21 to the cup tangential channel 43 of the cyclonic separating apparatus 1, and the air enters from the cup air inlet 42 into the cup chamber 40; the air passes through the perforated strainer 61 on the middle tub 6, and dust having a diameter size larger than the mesh of the perforated strainer 61 is caught in the outer dust collecting chamber. The air passing through the perforated strainer 61 flows along the intermediate passage to the tangential air inlet passage 72, the air enters the rotary chamber 80 through the inlet 82 and then undergoes an accelerated rotary flow, the rotary air flow is discharged from the small port 83, most of the dust particles in the air flow are separated and blocked by the baffle plate, and the dust falls into the intermediate dust collecting chamber. Further, air flows upwardly through the central passageway 81, through the lid outlet 50 and is further filtered by the high density filter screen 51. Finally, the clean air is drawn out of the external space through the motor assembly. The gas-dust separation structure arranged in the way is also scientific in dividing the gas path trend and classifying and concentrating dust on one hand, and is beneficial to both gas-dust separation efficiency and prolonging the service life of the filter element; on the other hand, the cyclone separator 7 further optimizes the gas-dust separation structure, effectively reduces the air duct resistance and improves the gas-dust separation effect.

The up-down direction defined by the separation cone 8 in the above embodiment is only an illustrative way for easy understanding, and in practical applications, the separation cone 8 may also be inverted. As shown in fig. 14, another arrangement of the cyclone separator 7 is schematically illustrated, a middle barrel body 6 is disposed in the dirt cup 4, the cyclone separation structure is disposed in the middle barrel body 6, the cyclone separation structure includes the inverted separation cone 8 and the baffle 9, the lower end portion of the separation cone 8 is a large end and is disposed with the cut-in port 82, the upper end portion of the separation cone 8 is a small end and is disposed with the small port 83 for air outlet, the baffle 9 is disposed outside the small port 83 on the upper portion of the separation cone 8, and the windward surface 91 of the baffle 9 extends upward beyond the small port 83 of the separation cone 8. When the rotating air flow is discharged from the small port 83, the dust moves upward outside the small port 83 and collides with the baffle plate 9 to slide down and separate, while the clean air flows upward and is discharged upward through the cover air outlet 50.

Claims (10)

1. A cyclone separation structure comprises a separation cone with a truncated cone-shaped rotating cavity, wherein the upper end part of the separation cone is a large cone end and is provided with a cut-in port, and the cut-in port is used for allowing external air to enter; the separation cone is characterized in that a separation blade is arranged at the lower part of the separation cone, and the separation blade is positioned outside the small port at the lower end part of the separation cone when viewed from the central axis direction of the rotating cavity; the separation blade has the windward side that can meet rotatory wind, and the small port edge of separation cone extends downwards to the windward side of separation blade moreover.

2. The cyclone separation structure of claim 1, comprising at least one baffle, wherein the central axis of the rotation cavity is arranged parallel to the windward side of the baffle, and the minimum distance between the geometric plane of the windward side and the central axis of the rotation cavity is smaller than the radius of the small port.

3. The cyclonic separating structure of claim 1, including at least one said baffle, wherein the geometric plane of the windward side passes through the small port and intersects the central axis of the rotating chamber at a point.

4. A cyclone separator using the cyclone separating structure as claimed in any one of claims 1 to 3, comprising a cylindrical housing, a plurality of said rotating chambers being annularly arranged inside said cylindrical housing, part of the cylindrical housing forming part of the separation cones of said rotating chambers, a plurality of said separation cones surrounding to form a central passage, the cut-in port of each said separation cone facing the outside of said cylindrical housing, and a stopper blocking the upper ports of said separation cones to allow the airflow in said rotating chambers to flow downward from the small ports of the separation cones into said central passage.

5. The cyclone separator according to claim 4, wherein one baffle is arranged between two adjacent separation cones, and a gap for airflow to pass through is reserved between two adjacent baffles.

6. The cyclone separator as claimed in claim 4 or 5, wherein an outer tangential air inlet channel communicated with the cylindrical shell is further arranged on the cyclone separator, the large-end cavity of the separation cone is communicated with the tangential air inlet channel through the cut-in port, and the tangential air inlet channel is used for providing tangential air flow to the rotating cavity.

7. The cyclone separator of claim 6 wherein the lower end of the cylindrical housing extends beyond the small port edge of the separation cone, the baffle being spaced from the cylindrical housing.

8. A cyclone separation device comprises a dust cup and a cup cover, wherein an opening is arranged at the upper part of the dust cup, the cup cover is detachably covered at the opening, a cup air inlet is arranged on the cup side wall of the dust cup, a cover air outlet is arranged on the cup cover, the dust cup is characterized by further comprising a cyclone separator of any one of claims 4 to 7 arranged in the dust cup, the cup cover is also covered at the upper end part of the separation cone of the cyclone separator to be used as the stopper to block the large port of the separation cone, the cup air inlet is communicated with the cutting inlet of the separation cone, the central channel of the cyclone separator is communicated with the cover air outlet, air entering from the cup air inlet can enter the rotating cavity through the cutting inlet, and air exhausted from the central channel can be exhausted out of the dust cup through the cover air outlet.

9. The cyclone separation device as claimed in claim 8, further comprising a middle barrel body arranged in the dust cup, wherein the upper part of the middle barrel body is open, at least part of the cyclone separator is arranged in the middle barrel body, a cylindrical shell of the cyclone separator is connected with the middle barrel body so as to form a middle channel, a porous filter screen is arranged on the wall body of the middle barrel body, and air entering from the cup air inlet enters the rotating cavity through the porous filter screen, the middle channel and the tangential air inlet in sequence.

10. A vacuum cleaner comprising cyclonic separating apparatus as claimed in claim 8 or 9.

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