CN216364899U - Gas-dust separation device and dust collector - Google Patents

Abstract

A gas-dust separation device and a dust collector comprise a shell, wherein the top end of the shell comprises a shell opening, a cyclone separation body, a middle barrel body and a barrel top cover which are arranged in the shell, and a shell air inlet is formed in the shell side wall of the shell; an exhaust pipe is arranged on the barrel top cover; the sealing ring is arranged on the barrel wall of the middle barrel body, the shell and the middle barrel body are in sealing connection through the sealing ring, the sealing ring is positioned above the barrel air inlet, so that air entering the shell from the shell air inlet enters the middle barrel body through the barrel air inlet, and the air in the middle barrel body rotates through the air inlet channel, enters the annular gap of the separation cone body and is discharged from the exhaust pipe; the separating cone comprises a plurality of peripheral separating cones arranged along the axial direction and a middle separating cone arranged among the peripheral separating cones, and the maximum air rotating radius of the upper end cavity of the middle separating cone is larger than that of the upper end cavity of the peripheral separating cone. The dust collector comprises a gas-dust separating device.

Description

Gas-dust separation device and dust collector

Technical Field

The invention relates to the technical field of dust collectors, in particular to a gas-dust separation device and a dust collector applying the same.

Background

Cyclone separation devices, which are increasingly used in vacuum cleaner products due to their simple structure and low maintenance cost, are based on the principle that air enters the cavity of a separation cone tangentially and rotates at high speed, and dust moves outwards and slides down the side wall of the separation cone under the action of the centrifugal force of rotation. In order to improve the air-dust separation efficiency of the cyclone separation device, a plurality of separation cones are commonly combined to form a multi-cone cyclone separation device, for example, german patent No. DE202006017010U1 discloses a cyclone vacuum cleaner having a two-stage separation device, wherein a downstream separation device is composed of a plurality of cyclone separators connected in parallel, as shown in fig. 1, the plurality of cyclone separators includes a cyclone separator arranged in the middle and eight cyclone separators arranged around the cyclone separator, and each cyclone separator is provided with an air inlet for tangential air inlet and an air inlet channel, the nine cyclone separators are all basically the same in structural size, and the air inlet is also basically the same in size. Although the arrangement mode increases the number of the cyclone separators and improves the separation efficiency, the arrangement space of the downstream separation device cannot be fully utilized, and the air inlet channel of the cyclone separator arranged in the middle is too long, so that the air-dust separation effect of the cyclone separator in the middle can be influenced.

Disclosure of Invention

Aiming at the problems in the prior art, in order to improve the air throughput of the cyclone separation device and further increase the use efficiency of the cyclone separation device, the invention provides a gas-dust separation device, which comprises a shell, a cyclone separation body, a middle barrel body and a barrel top cover, wherein the top end of the shell comprises a shell opening; the top end of the middle barrel body comprises a barrel opening, a barrel air inlet integrated by a plurality of micropores is formed in the barrel wall of the middle barrel body, at least part of the cyclone separation body is arranged in the middle barrel body, and the barrel top cover is detachably sealed at the barrel opening; the cyclone separation body comprises a plurality of separation cones, and a cavity at the upper end of each separation cone is respectively communicated with an air inlet channel; the air inlet device is characterized in that an exhaust pipe is arranged on the barrel top cover, when the barrel top cover is covered and sealed at the opening of the barrel, the barrel top cover and the cyclone separating body are matched up and down to form the air inlet channel, the lower end of the exhaust pipe is inserted into a cavity at the upper end of the separating cone, and an annular gap is formed between the exhaust pipe and the separating cone; a sealing ring is arranged on the barrel wall of the middle barrel body, the shell and the middle barrel body are in sealing connection through the sealing ring, the sealing ring is positioned above the barrel air inlet, so that air entering the shell from the shell air inlet enters the middle barrel body through the barrel air inlet, and the air in the middle barrel body rotates through the air inlet channel, enters the annular gap of the separation cone and is discharged from the exhaust pipe; the separation cone comprises a plurality of peripheral separation cones arranged along the axial direction and a middle separation cone arranged among the peripheral separation cones, and the maximum air rotation radius of the upper end cavity of the middle separation cone is larger than that of the upper end cavity of the peripheral separation cone.

Thereby the separation cone, thereby both ends are the truncated form about its, and both ends are uncovered, thereby contain at least one section and be conical inner chamber and can let rotatory air constantly by the effect that promotes centrifugal force and accelerate the gas-dust separation when rotatory in the conical inner chamber. In the specific structural arrangement of the separation cone, the separation cone can also comprise a section of truncated cone-shaped wall body and a section of cylindrical column-shaped wall body, the section of truncated cone-shaped wall body and the section of cylindrical column-shaped wall body are connected up and down, so that the column-shaped wall body and the cone-shaped wall body jointly define a cavity of the separation cone, the cavity at the upper end of the separation cone is cylindrical, the cavity at the lower end of the separation cone is in an inverted cone shape, and the lower end opening of the separation cone is a dust exhaust port.

The air inlet channel is a space channel for guiding external air to flow to the separation cone, the air inlet channel is defined by a channel side wall, a channel bottom wall and a channel top wall, the air inlet channel communicated with the middle separation cone is arranged on the side edge of the peripheral separation cone, and in order to improve the space utilization rate, one part of the channel side wall is formed by adjacent wall bodies of the separation cone.

The barrel top cover is covered on the barrel opening of the middle barrel body and is combined with the cone opening of the separation cone body, an exhaust pipe is further arranged on the barrel top cover, and a barrel cover air outlet is formed in an air outlet of the exhaust pipe; the exhaust pipe is a tubular component arranged on the barrel top cover and is used for being inserted into the upper end cavity of the separation cone and guiding air to flow upwards to overflow the barrel cover air outlet; in order to match with the peripheral separation cone and the middle separation cone, the exhaust pipe comprises a peripheral exhaust pipe and a middle exhaust pipe.

Further, in order to improve the air tightness between the tub top cover and the separation cone, a sealing gasket may be further disposed between the tub top cover and the cyclone separating body.

The maximum rotation radius of the upper end cavity of the middle separation cone and the peripheral separation cone refers to the maximum rotation inner diameter defined by the conical or cylindrical wall body at the upper end of the middle separation cone and the peripheral separation cone, and generally speaking, the larger the maximum rotation radius of the upper end cavity is, the larger the volume of the upper end cavity is, and thus more air can pass through the upper end cavity at the same time. In addition, the central separation cone having a larger diameter is disposed at a central position, and the plurality of peripheral separation cones having a smaller diameter are disposed at peripheral positions, which enables maximum utilization of the occupied space of the cyclone separation body.

The annular gap is a part of the upper end cavity of the separation cone, and wind blown from the air inlet channel firstly enters the annular gap and rotates along the side wall of the separation cone, and then is sucked into the exhaust pipe.

According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: firstly, the maximum rotation radius of the upper end cavity of the middle separation cone is larger than that of the upper end cavity of the peripheral separation cone, so that the volume of the cavity of the middle separation cone is greatly increased, the air throughput is increased, and the use efficiency of the separation cone is improved; secondly, from the viewpoint that the maximum radius of rotation of the upper end cavity of the peripheral separation cone is smaller than that of the upper end cavity of the middle separation cone, the smaller size of the peripheral separation cone can instead make more use of the peripheral space and leave a larger arrangement space for the middle separation cone. Thirdly, after the radius of the middle separation cone is increased, the distance between the middle separation cone and the peripheral separation cone is shortened, so that the length of an air channel communicated with the middle separation cone is shortened, the loss of air in the air channel is reduced, and the air-dust separation effect of the cyclone separation body is ensured.

In order to increase the air inlet and outlet channels and reduce the attenuation of the air flow speed, two or more than two cut-in ports are uniformly distributed on the middle separation cone, each cut-in port on the middle separation cone is communicated with an independent air inlet channel, and the cut-in ports are communicated with the air inlet channels and the annular gap. The cutting openings are openings which are arranged on the separation cone and can be communicated with the upper end cavity of the separation cone and the air inlet channel, two or more cutting openings are uniformly arranged on the middle separation cone, each cutting opening is communicated with an independent air inlet channel, or in another embodiment, one air inlet channel is communicated with 2 or more than 2 cutting openings. The number of the incisions on the middle separation cone may be 2, 3, 4 or more, and the plurality of incisions is evenly distributed along the separation cone. The arrangement has the advantages that on one hand, the rotary kinetic energy of air can be supplemented to the upper end cavity of the middle separation cone within a smaller arc distance, so that the attenuation of the air flow speed is favorably reduced, and the separation efficiency of the middle separation cone is favorably improved; on the other hand, the more air inlet channels are matched with the middle separation cone, so that the air supply is ensured, and the integral air treatment efficiency of the cyclone separation body is improved.

In order to promote gas dust separation device's gas dust separation effect, further technical scheme can also be, still including can the capping arrive the shell top cap of the uncovered department of shell, the bucket top cap is located the inboard of shell top cap, be provided with the cap air outlet on the shell top cap, the gas outlet intercommunication of exhaust pipe the cap air outlet be provided with airstrainer on the circulating path between exhaust pipe and the cap air outlet. Utilize airstrainer filters the air and can effectively filter the tiny dust particle in the air, improves greatly and follows the cleanliness factor of bung air outlet exhaust air.

The technical scheme can also be that the middle barrel body is funnel-shaped, the lower end opening of the middle barrel body is propped against the bottom wall of the shell, so that air outside the middle barrel body is not easy to enter the middle barrel body from the lower end opening of the middle barrel body. Further, a sealing ring can be arranged between the middle barrel body and the bottom wall of the shell to further increase the air tightness between the middle barrel body and the bottom wall of the shell. Furthermore, the bottom wall of the shell can be arranged in a mode that the lower end of the bottom wall of the shell can be overturned, when the shell bottom cover is covered on the shell, the lower end opening of the middle barrel body abuts against the shell bottom cover, and therefore dust in the shell can be cleaned conveniently.

The technical scheme includes that the outer side of the side wall of the middle barrel body is provided with an air guide slope, the air guide slope faces the shell air inlet, and the air guide slope is used for guiding air entering the shell from the shell air inlet to flow in a rotating mode along the same direction.

Due to the advantages of the air-dust separating device, the air-dust separating device can be applied to a dust collector.

Due to the above characteristics and advantages, the invention can be applied to the air-dust separating device and the dust collector.

Drawings

FIG. 1 is a prior art cyclone separator;

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

FIG. 3 is a schematic axial view of the gas-dust separating apparatus;

FIG. 4 is a schematic view of an exploded structure of the gas-dust separating apparatus;

FIG. 5 is a schematic sectional view of the gas-dust separating apparatus in a front view;

FIG. 6 is a schematic view of a structure of the cyclone separating body in a shaft side direction;

FIG. 7 is a schematic view of a top view of the cyclonic separating body;

FIG. 8 is a schematic view of the cross-sectional structure taken along the line A-A in FIG. 7;

FIG. 9 is a schematic cross-sectional view of the cyclone separation body and the top cover assembly;

FIG. 10a is a simplified cross-sectional schematic view of the cyclonic separating body showing a plurality of separation cones arranged at the same radius;

FIG. 10b is a simplified cross-sectional schematic view of the cyclonic separating body showing a condition in which the radius of the central separating cone is greater than the radius of the peripheral separating cone;

FIG. 11 is a schematic structural view of the middle separation cone connecting 2 air inlet passages;

FIG. 12 is a schematic structural view of the middle separation cone connecting 3 air inlet channels;

FIG. 13 is a schematic view of the structure of the middle separation cone connecting 4 air inlet channels.

Detailed Description

The structure of the cyclone separating body, the air-dust separating apparatus and the vacuum cleaner to which the present invention is applied will be further described with reference to the accompanying 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 comprises a main body 10, a connecting pipe 11 and a suction head 12, wherein the main body 10 comprises a power device (not shown), an air-dust separating device 13 and a holding part 14, and the power device, the air-dust separating device 13 and the holding part 14 are connected with each other to form a whole device. The connecting tube 11 is disposed between the main body 10 and the suction head 12, and the grip 14 is provided at one side of the power unit for gripping. The main structure of the cleaner will be described in detail with reference to the accompanying drawings.

The power device comprises a motor (not shown in the figure) and fan blades (not shown in the figure) arranged on the electrode shafts, and the fan blades are positioned at the downstream of the air-dust separation device 13, so that when the motor drives the fan blades to rotate, vacuum negative pressure for dust collection is formed. Therefore, when the motor works, if the wind resistance of the upstream air circulation is smaller, the larger the air amount which can be sucked by the fan blades is, and the working efficiency of the motor, namely the working efficiency of the dust collector is high.

The air-dust separating device 13 mainly separates air and dust flowing through the interior of the cyclone separating body 3 through a filter screen arranged in the air-dust separating device 13, and the air-dust separating device 13 is detachably connected with the power device; the gas-dust separating device 13 also comprises two ports, namely a gas inlet and a gas outlet, wherein the gas outlet of the gas-dust separating device 13 is positioned at the upstream of the power device, and the gas inlet of the gas-dust separating device 13 is communicated with the gas outlet of the connecting pipe part 11. Under the action of the vacuum negative pressure of the power device, the suction head part 12 can suck air and simultaneously suck dust, silk threads and other garbage on the surface of the deposited matters and convey the garbage to the air-dust separation device 13 through the connecting pipe part 11.

Since the air-dust separating device 13 includes a plurality of filtering structures, the air-dust separating device 13 generates a large resistance in the whole dust collector, and is a main component affecting the dust collecting efficiency of the dust collector. As shown in fig. 3 to 5, the gas-dust separating device 13 includes a casing 2, the top end of the casing 2 includes a casing opening, the casing 2 is cylindrical and includes a casing side wall 21 and a casing bottom cover 22, the casing side wall 21 and the casing bottom cover 22 define a casing cavity together, wherein a casing air inlet 23 is disposed on the casing side wall 21, and the casing air inlet 23 is used as an air inlet of the gas-dust separating device 13 and is communicated with an air outlet of the connecting pipe portion 11.

As shown in fig. 4 to 9, the gas-dust separating device 13 further includes the cyclonic separating body 3 installed in the housing 2, the cyclonic separating body 3 includes a plurality of separating cones arranged along an axial direction, cavities are arranged in the separating cones, the top ends of the separating cones include cone openings, the upper end portions of the separating cones are provided with cut-in ports 33, air inlet channels 35 are arranged outside the separating cones, the cavities at the upper ends of the separating cones are communicated with the air inlet channels 35 through the cut-in ports 33, at least the tail ends of the air inlet channels 35 are tangential bleed air sections, and the tangential bleed air sections guide air to flow along a tangential direction of the cavities at the upper ends of the separating cones so as to provide tangential intake air to the cavities at the upper ends of the separating cones along the tangential direction; the plurality of separation cones comprises a plurality of peripheral separation cones 3a and a middle separation cone 3b arranged between the plurality of peripheral separation cones 3 a; the maximum rotation radius of the upper end cavity of the middle separation cone 3b is larger than that of the upper end cavity of the peripheral separation cone 3a, and two or more than two cutting inlets 33 are uniformly distributed on the middle separation cone 3 b.

As shown in fig. 6, the separation cone includes a truncated cone-shaped wall body 31 and a cylindrical column-shaped wall body 32 arranged at the end of the cone-shaped wall body 31 with the larger diameter, the cone-shaped wall body 31 and the column-shaped wall body 32 define the cavity of the separation cone together, the cavity at the upper end of the separation cone is cylindrical, the cavity at the lower end of the separation cone is in an inverted cone shape, the upper end and the lower end of the separation cone are both in an open shape, and the dust exhaust port 34 is formed at the lower end of the separation cone in a truncated shape. As an equivalent solution, the separation cone may only retain the conical wall 31, the cutting opening 33 is arranged on the conical wall 31, and the upper end cavity of the corresponding separation cone is an end cavity with a larger diameter of the conical cavity.

In order to fully utilize the limited space and improve the filtering efficiency of the cyclone separating body 3, as shown in fig. 6 to 9, the separating cones include a plurality of peripheral separating cones 3a and a middle separating cone 3b disposed between the peripheral separating cones 3 a; the peripheral separation cones 3a and the middle separation cones 3b are arranged along the axial direction of the cyclone separation body 3, in this embodiment, the number of the middle separation cones 3b is 1, and the axis thereof coincides with the axis of the cyclone separation body 3; whereas the axis of said peripheral separation cone 3a is arranged at an angle to the axis of said cyclonic separating body 3. Wherein, the maximum radius of rotation of the upper end cavity of the said middle separation cone 3b is greater than the maximum radius of rotation of the upper end cavity of the said peripheral separation cone 3a so as to increase the air throughput, has improved the use efficiency of the said separation cone, namely can improve the drawing force of the electrical machinery, secondly compare with 202010273737.6, the invention patent application named "cyclone separator and cleaning equipment" discloses a plurality of second cyclone tube methods, this structure is relatively simple and make the structure of the manufacturing mould simple too, the service life is high, in addition the said middle separation cone 3b with larger diameter makes it closer to the said peripheral separation cone 3a, in this way, help to reduce the length of the inlet channel 35 connected to the said middle separation cone 3b and thus reduce the attenuation of the air energy on the said inlet channel 35.

In order to facilitate air intake, as shown in fig. 6, an inlet 33 is provided on each of the peripheral separation cones 3a, and each of the inlet 33 communicates with an independent air intake passage 35; the middle separation cone 3b with a larger upper cavity needs to be matched with the larger air inlet channel 35 and the larger cut-in port 33, but the excessively large air inlet channel and the excessively large cut-in port 33 are not beneficial to the rotating effect of air in the cavity, so that two or more cut-in ports 33 can be uniformly distributed on the middle separation cone 3b without enlarging the air inlet channel 35, and each cut-in port 33 is communicated with an independent air inlet channel 35. As shown in fig. 11, the central separation cone 3b is connected to two of the inlet ports 33 and the inlet passage 35. As shown in fig. 12, the middle separation cone 3b is connected to three of the inlet ports 33 and the inlet passage 35. As shown in fig. 6 and 13, the middle separation cone 3b is connected with four cutting ports 33 and four air inlet channels 35; and the arranged cutting openings 33 are uniformly arranged in the circumferential direction. Through evenly arrange a plurality ofly on middle part separation cone 3b incision mouth 33 can be in less arc distance to the rotatory kinetic energy of middle part separation cone 3 b's upper end cavity replenishment air is favorable to slowing down the decay of air flow velocity, thereby is favorable to improving the separation efficiency of middle part separation cone 3 b. The air inlet channel 35 communicating with the middle separation cone 3b is arranged at the side of the peripheral separation cone 3a, and in order to improve the space utilization, part of the side of the peripheral separation cone 3a is used as the channel side wall of the air inlet channel 35, so that the air inlet ends of the air inlet channels 35 communicating with the peripheral separation cone 3a and the middle separation cone 3b are arranged along the outer edge of the cyclone separation body 3.

With respect to the advantage of the maximum radius of rotation of the upper end cavity of the central separation cone 3b being greater than the maximum radius of rotation of the upper end cavity of the peripheral separation cone 3a, for increasing the air throughput, a simple example is shown below, as shown in fig. 10a and 10b, which are simplified cross-sectional views of the separation cone 13, and fig. 10a and 10b, which are both arranged within the same radius R0, wherein fig. 10a is provided with 7 separation cones of the same radius R1, the sum of the areas of the 7 separation cones being 7 a 1. Whereas in fig. 10b the radius of the peripheral separation cone 3a decreases by 0.82R 1 in number of 8, and the radius of the central separation cone 3b increases by 1.36R 1 in number of 1, calculated as the sum of the areas of the peripheral separation cone 3a and the central separation cone 3b in fig. 10b is 7.21 a 1. It follows that by increasing the radius of the central separating cone 3b and decreasing the radius of the peripheral separating cones 3a and correspondingly increasing the number of peripheral separating cones 3a, the total area of the separating cones can be effectively increased, which means that an increased air throughput and a maximized utilization of the cross-sectional area of the cyclone separating bodies is facilitated.

As for the mounting structure of the cyclone separating body 3, specifically, in the first embodiment, the cyclone separating body 3 can be directly placed in the housing cavity (not shown) of the housing 2, a housing top cover 6 is provided at the housing opening of the housing 2, the cyclone separating body 3 above the air inlet channel is hermetically connected with the housing side wall 21 of the housing 2 so as to allow the air in the housing cavity of the housing 2 to directly enter the air inlet channel 35, and the air coming out of the upper end cavity of the separating cone is directly discharged from the housing cover outlet 60 in the housing top cover 6. The path of the air through the gas-dust separating device 13 is as follows: air enters the housing 2 from the housing air inlet 23, the air directly enters the separation cone through the air inlet channel 35, and the air coming out of the upper end cavity of the separation cone is discharged through the housing cover air outlet 60.

In the second embodiment, the mounting structure of the cyclone separating body 3, as shown in fig. 4 and 5, the gas-dust separating device 13 further comprises the shell top cover 6 detachably covering and sealing the shell 2, and a shell cover air outlet 60 in the shell top cover 6; the middle barrel body 5 is further included, and at least part of the cyclone separation body 3 extends into the middle barrel body 5; the barrel is characterized by further comprising a barrel top cover 4, wherein the barrel top cover 4 covers and seals the barrel opening of the middle barrel body 5.

The gas-dust separating device 13 further includes a middle barrel body 5 disposed in the housing cavity, the top end of the middle barrel body 5 includes a barrel opening, the barrel side wall of the middle barrel body 5 includes an upper wall 51 with a larger upper diameter and a lower wall 52 with a smaller diameter, the lower wall 52 is in smooth transition connection with the upper wall 51 through a tapered wall, wherein a metal screen is disposed on the upper wall 51, a plurality of micropores are formed on the metal screen, and the plurality of micropores are integrated to form a barrel air inlet 54, as shown in fig. 4, a part of micropores, and the mesh number of the micropores is adjusted according to different use environments in another embodiment, the metal screen may also be disposed on the tapered wall in smooth transition connection between the lower wall 52 and the upper wall 51, or both the tapered wall and the upper wall 51 are disposed with metal screens.

A circle of first skirt edge 53 extending outwards in the radial direction is further arranged on the upper wall 51 above the barrel air inlet 54, a step matched with the first skirt edge 53 is arranged on the shell side wall 21, and the first skirt edge 53 is lapped on the step to form sealing isolation so as to axially divide the shell cavity into an upper cavity and a lower cavity. In a further embodiment, a sealing ring can be arranged at the overlapping part between the first skirt 53 and the step so as to improve the isolation between the upper and lower chambers. In another embodiment, as shown in fig. 4 and 5, a second skirt may be further disposed above the first skirt 53, and an annular sealing groove is formed between the first skirt 53 and the second skirt, and a sealing ring is disposed in the sealing groove, so that the airtightness of the connection between the middle barrel 5 and the shell side wall 21 is improved by the sealing ring. The lower end of the lower wall 52 of the middle barrel body 5 is connected to the shell bottom cover 22, so that the lower port of the lower wall 52 is closed by the shell bottom cover 22, air in the shell cavity cannot enter the middle barrel body 5 through the lower port of the lower wall 52, then a peripheral separation cavity is formed between the barrel side wall of the middle barrel body 5 and the shell 2, and wind entering the shell cavity from the wind inlet 23 firstly enters the peripheral separation cavity and then enters the middle barrel body 5 through the barrel wind inlet 54.

When the wind entering the housing chamber from the wind inlet 23 passes the tub wind inlet 54, large particles of dust and silk are intercepted by the tub wind inlet 54 and fall to the bottom of the peripheral separation chamber. Further, an air guiding slope 55 is disposed on an outer side of the sidewall of the middle barrel body 5, the air guiding slope 55 faces the shell air inlet 23, and the air guiding slope is used for guiding the air entering the housing 2 from the shell air inlet 23 to flow in the same direction in a rotating manner.

As shown in fig. 6 and 9, the air inlet passage 35 includes a passage side wall, a passage bottom wall and a passage top wall, wherein the passage side wall, the passage bottom wall are disposed at the top end of the cyclone separating body 3 and connect the passage side wall with the side wall of the separating cone, and the passage top wall is disposed on the tub top cover 4, and when the tub top cover 4 is closed to the tub opening of the middle tub 5, the tub top cover 4 and the top end of the cyclone separating body 3 are fitted up and down to form the air inlet passage 35, thereby simplifying the manufacturing mold structure; wherein a sealing gasket 8 can be arranged between the top cover 4 and the top end of the cyclone separating body 3, the sealing gasket 8 allows the air in the middle barrel body 5 to enter the air inlet channel 35 only, and also allows the air in the cavity at the upper end of the separating cone to be exhausted from the exhaust pipe 41 on the top cover 4 only. The air thus entering from the inlet opening 33 rotates in the upper cavity of the separation cone, and dust particles in the air slide down the conical wall 31 due to centrifugal action and fall from the dust outlet 34 to below the separation cone.

In order to make the wind entering from the tub wind inlet 54 smoothly flow to the air inlet end of the air inlet channel 35, as shown in fig. 5 and 6, the cyclone separating body 3 further includes a separating wall with a downward opening, the separating wall includes a separating side wall 36 and a separating top wall 37, the separating side wall 36 and the conical wall of the middle tub 5 are connected to form a middle separating chamber, and one end of the dust outlet 34 of the peripheral separating cone 3a and the middle separating cone 3b extends into the middle separating chamber. Meanwhile, the outer diameter of the separation sidewall 36 is smaller than the upper wall 51 of the middle tub body 5, and a gap between the separation sidewall 36 and the upper wall 51 forms a middle overfire air passage, so that the wind entering from the tub inlet 54 can flow along the middle overfire air passage to the inlet end of the inlet passage 35.

The path of the air of the second assembly structure through the gas-dust separating device 13 is as follows: air enters the shell 2 from the shell air inlet 23, air enters the middle barrel body 5 through the barrel air inlet 54 on the middle barrel body 5, the air in the middle barrel body 5 enters the separation cone body through the air inlet channel 35 in a rotating mode, and the air coming out of the cavity at the upper end of the separation cone body enters the shell cover air outlet 60 through the shell cover air outlet 40 and is discharged. The air-dust separating device 13 filters dust in air as follows: large particles of dust and silk threads are intercepted and concentrated to the bottom of the peripheral separation chamber when passing through the barrel air inlet 54, fine dust falls into the middle separation chamber from the dust exhaust port 34 after passing through the centrifugal rotation in the separation cone, and fine dust and suspended particles are intercepted or adsorbed by the air filter screen 7.

Further, after the air is subjected to air-dust separation in the cavity of the cyclone separation body 3, in order to guide the purified air to flow out, as shown in fig. 4, 5 and 9, the air-dust separation device 13 further includes a top cover 4 detachably covering and sealing the opening of the middle barrel body 5, a barrel cover air outlet 40 is arranged on the top cover 4, the upper end of the cyclone separation body 3 is combined with the lower surface of the top cover 4, and the cavity at the upper end of the separation cone is communicated with the barrel cover air outlet 40. The drum cover air outlet 40 comprises a peripheral drum cover air outlet 40a and a middle drum cover air outlet 40b, which are matched with the separation cone. Many exhaust pipes 41 have still been arranged along the axial on the bucket top cap 4, the one end intercommunication of exhaust pipe 41 the bung air outlet 40 of bucket top cap, the other end stretch into in the upper end cavity of separation cone, wind can be followed exhaust pipe 41's pipeline upflow passes through bung air outlet 40 is discharged, and is corresponding, the exhaust pipe also includes peripheral exhaust pipe 41a and middle part exhaust pipe 41b equally. The annular gap between the middle exhaust pipe 41b and the middle separation cone 3b forms a middle annular gap 42b, the annular gap between the peripheral exhaust pipe 41a and the peripheral separation cone 3a forms a peripheral annular gap 42a, the maximum sectional area of the middle annular gap 42b is larger than that of the peripheral annular gap 42a, and the volume of the middle annular gap 42b is larger than that of the peripheral annular gap 42a, which means that the middle separation cone 3b with a larger diameter is provided with a larger air passage channel. In order to ensure the air throughput, the inner diameter of the middle exhaust duct 41b matching with the middle separation cone 3b is larger than the inner diameter of the peripheral exhaust duct 41a matching with the peripheral separation cone 3 a. The size ratio of the peripheral channel to the middle channel is more balanced, so that more air can pass through the middle separation cone 3b, and the air flowing through the middle separation cone 3a and the air flowing through the peripheral separation cone 3a can pass through the middle separation cone at more balanced pressure. And in order to reduce air leakage at the joint, a sealing gasket 8 can be arranged at the joint between the barrel top cover 4 and the cyclone separation body 3 to enhance the connection sealing performance of the two components.

As shown in fig. 5, the case top cover 6 is disposed above the tub top cover 4, a case cover air outlet 60 is provided at the case top cover 6, and the wind discharged from the tub cover air outlet 40 is discharged through the case cover air outlet 60. In order to further improve the air filtering effect, an air filter screen 7 (for example, HAPE filter screen) is arranged on the circulation path between the barrel cover air outlet 40 and the barrel cover air outlet 60, and by setting the air filter screen 7, fine suspended particles in the air can be further filtered, so that the cleanliness of the discharged air is greatly improved.

In order to facilitate cleaning of dust accumulated in the peripheral separation chamber and the middle separation chamber, a further technical scheme may be that a shell bottom cover 22 is arranged at the lower end of the shell 2 in an overturning manner, the lower end of the middle barrel body 5 is open, and when the shell bottom cover 22 covers the shell 2, the lower end opening of the middle barrel body 5 abuts against the shell bottom cover 22, and the dust and garbage in the middle separation chamber and the peripheral separation chamber can be cleaned simultaneously by arranging the shell bottom cover 22 which can be opened in an overturning manner, so that convenience in dust cleaning is greatly improved.

Claims (7)

1. A gas-dust separation device comprises a shell, a cyclone separation body, a middle barrel body and a barrel top cover, wherein the top end of the shell comprises a shell opening; the top end of the middle barrel body comprises a barrel opening, a barrel air inlet integrated by a plurality of micropores is formed in the barrel wall of the middle barrel body, at least part of the cyclone separation body is arranged in the middle barrel body, and the barrel top cover is detachably sealed at the barrel opening; the cyclone separation body comprises a plurality of separation cones, and a cavity at the upper end of each separation cone is respectively communicated with an air inlet channel; the air inlet device is characterized in that an exhaust pipe is arranged on the barrel top cover, when the barrel top cover is covered and sealed at the opening of the barrel, the barrel top cover and the cyclone separating body are matched up and down to form the air inlet channel, the lower end of the exhaust pipe is inserted into a cavity at the upper end of the separating cone, and an annular gap is formed between the exhaust pipe and the separating cone; a sealing ring is arranged on the barrel wall of the middle barrel body, the shell and the middle barrel body are in sealing connection through the sealing ring, the sealing ring is positioned above the barrel air inlet, so that air entering the shell from the shell air inlet enters the middle barrel body through the barrel air inlet, and the air in the middle barrel body rotates through the air inlet channel, enters the annular gap of the separation cone and is discharged from the exhaust pipe; the separation cone comprises a plurality of peripheral separation cones arranged along the axial direction and a middle separation cone arranged among the peripheral separation cones, and the maximum air rotation radius of the upper end cavity of the middle separation cone is larger than that of the upper end cavity of the peripheral separation cone.

2. The gas-dust separating device of claim 1, wherein two or more than two cut-in ports are uniformly distributed on the middle separating cone, each cut-in port on the middle separating cone is communicated with an independent gas inlet channel, and the cut-in ports are communicated with the gas inlet channels and the annular gap.

3. A gas-dust separating apparatus according to claim 1, further comprising a gasket disposed between the top cover of the tub and the cyclone separating body.

4. A gas-dust separating device according to any one of claims 1 to 3, further comprising a cover top capable of covering the opening of the casing, wherein the drum top is located inside the cover top, a cover outlet is provided on the cover top, the outlet of the exhaust duct is communicated with the cover outlet, and an air filter is provided on a flow path between the exhaust duct and the cover outlet.

5. A gas-dust separating apparatus according to claim 4, in which the intermediate bin is funnel-shaped with the lower end opening of the intermediate bin resting against the bottom wall of the housing.

6. The gas-dust separating device of claim 4, wherein an air guiding slope is disposed on an outer side of the tub side wall of the middle tub body, the air guiding slope faces the case air inlet, and the air guiding slope is used for guiding the air entering the case from the case air inlet to rotate and flow in the same direction.

7. A vacuum cleaner comprising the air-dust separating apparatus as claimed in any one of claims 1 to 6.

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