WO2020045781A1 - Multi-cyclone dust collecting device and vacuum cleaner including same - Google Patents

Abstract

A multi-cyclone dust collecting device according to the present disclosure comprises: a primary cyclone formed to primarily separate contaminants from introduced contaminant-containing air; and a plurality of second cyclones which are installed in the primary cyclone so as to separate fine dust from air discharged from the primary cyclone, and each of which has a plurality of introduction ports and one discharge port, wherein the plurality of introduction ports arranged on each of the plurality of secondary cyclones protrude outward from a body of the each of the plurality of secondary cyclones and are formed in tangential directions to the outer circumferential surface of the each of the plurality of secondary cyclones.

Description

Multi cyclone dust collector and vacuum cleaner having same

The present disclosure relates to a cyclone dust collector used in a vacuum cleaner, and more particularly, to a multi-cyclone dust collector including a primary cyclone and a plurality of secondary cyclones and a vacuum cleaner having the same.

Instead of wired vacuum cleaners that supply electricity by connecting wires to an external power source, wireless vacuum cleaners that operate using electricity output from the built-in battery without connecting wires to an external power source are widely used.

In such a vacuum cleaner, a multi-cyclone dust collector using centrifugal force is used as a dust collector for collecting dust and dirt.

The multi-cyclone dust collector includes a primary cyclone that separates dust and dust from the air including dirt introduced from the outside and a plurality of secondary cyclones that separate fine dust from the air discharged from the primary cyclone.

In the case of secondary cyclones, pressure losses occur due to the pressure difference between the air entering the inlet and the air exiting the outlet.

As the pressure loss of the multi-cyclone dust collector increases, the suction force of the vacuum cleaner itself, that is, the cleaning performance, decreases, so it is necessary to minimize the pressure loss.

At this time, if the pressure loss is reduced, since the separation efficiency of the multi-cyclone dust collector can be reduced, a multi-cyclone dust collector that can minimize the pressure loss while maintaining the separation efficiency of the multi-cyclone dust collector is required.

The present disclosure was devised in view of the above problems, and the separation efficiency is related to a multi-cyclone dust collector and a vacuum cleaner having the same, which can reduce pressure loss while maintaining the same efficiency as the multi-cyclone dust collector according to the prior art. .

Multi-cyclone dust collector according to an aspect of the present disclosure, the primary cyclone formed to separate the dirt first from the incoming dirt-containing air; And a plurality of secondary cyclones installed inside the primary cyclone and formed to separate fine dust from the air discharged from the primary cyclone, each of which includes a plurality of inlets and one outlet. The plurality of inlets provided in each of the secondary cyclones of the protruding outward from the body of each of the plurality of secondary cyclones, it may be formed in a tangential direction with respect to the outer peripheral surface of each of the plurality of secondary cyclones.

In this case, the plurality of inlets may be provided at an upper end of an outer circumferential surface of each of the plurality of secondary cyclones.

In addition, each of the plurality of secondary cyclones, the hollow cylindrical portion provided with the plurality of inlets; A hollow truncated cone portion provided at a lower end of the hollow cylindrical portion; And a top plate installed at an upper end of the cylindrical part and provided with the discharge port.

In addition, the cylindrical portion and the truncated cone portion is formed integrally, the top plate may be formed separately from the cylindrical portion.

In addition, the plurality of inlets may include an inlet duct formed so that air can be introduced in a tangential direction to the outer peripheral surface of the cylindrical portion.

In addition, the plurality of inlets may be formed so that each cross-sectional area is less than or equal to the cross-sectional area of the outlet.

In addition, each of the plurality of inlets may include an opening formed in each of the plurality of secondary cyclones; And an inlet duct formed to surround the opening.

The inlet duct may further include an inlet guide wall installed in a tangential direction with respect to an outer circumferential surface of the secondary cyclone; An upper wall connecting an upper end of the inflow guide wall and an upper end of the secondary cyclone; And a lower wall installed in parallel with the upper wall and connecting a lower end of the inflow guide wall and an outer circumferential surface of the secondary cyclone.

In addition, each of the plurality of inlets may further include a control unit extending toward the opening in the outer peripheral surface of the secondary cyclone corresponding to the start end of the inlet duct.

In addition, the control unit may extend along a virtual circle corresponding to the outer circumferential surface of the secondary cyclone.

In addition, the outlet of the secondary cyclone includes a discharge pipe, the lower end of the discharge pipe may be located at the same or lower position than the lower end of each of the plurality of inlet pipes.

In addition, the primary cyclone discharges air to the intermediate chamber, and a plurality of inlets of each of the plurality of secondary cyclones may be provided to open toward the intermediate chamber.

In addition, the multi-cyclone dust collector according to an embodiment of the present disclosure includes a housing forming the primary cyclone; An intermediate wall installed inside the housing and partitioning the plurality of secondary cyclones and the housing; A dust collecting chamber disposed under the plurality of secondary cyclones and collecting fine dust separated from the plurality of secondary cyclones; A lower plate installed inside the intermediate wall to partition between the lower ends of the plurality of secondary cyclones and the dust collecting chamber; And an upper plate installed at an upper end of the plurality of secondary cyclones to prevent space between the plurality of secondary cyclones.

In addition, a porous member may be installed along a circumference of a portion corresponding to the upper plate and the lower plate of the intermediate wall.

A vacuum cleaner according to another aspect of the present disclosure includes a suction nozzle; A multi-cyclone dust collector connected to the suction nozzle; And a suction motor connected to the multi-cyclone dust collector and generating a suction force, wherein the multi-cyclone dust collector comprises: a primary cyclone configured to separate the dirt first from the introduced dirt-containing air; And a plurality of secondary cyclones installed inside the primary cyclone and formed to separate fine dust from the air discharged from the primary cyclone, each of which includes a plurality of inlets and one outlet. The plurality of inlets provided in each of the secondary cyclones of the protruding outward from the body of each of the plurality of secondary cyclones, it may be formed in a tangential direction with respect to the outer peripheral surface of the body.

According to the multi-cyclone dust collector according to an embodiment of the present disclosure having the structure as described above, the separation efficiency has the advantage of reducing the pressure loss while maintaining almost the same as the multi-cyclone dust collector according to the prior art.

1 is a perspective view of a multi-cyclone dust collector according to an embodiment of the present disclosure;

FIG. 2 is a cross-sectional view of the multi-cyclone dust collector of FIG. 1 taken along line II; FIG.

3 is a cross-sectional view taken along the line II-II of the multi-cyclone dust collector of FIG.

4 is a perspective view showing a secondary cyclone of a multi-cyclone dust collector according to an embodiment of the present disclosure;

5 is a plan view of the secondary cyclone of FIG. 4;

6 is a longitudinal cross-sectional view of the secondary cyclone of FIG. 4;

7 is an exploded perspective view illustrating a state in which an upper body and an integrated body of a plurality of secondary cyclones of the multi-cyclone dust collector according to one embodiment of the present disclosure are separated;

8 is a schematic cross-sectional view of a mold for molding an injection molding forming a body of a plurality of secondary cyclones of a multi-cyclone dust collector according to an embodiment of the present disclosure;

9A to 9D are plan views illustrating a state in which a top plate is separated from a secondary cyclone of a multicyclone dust collector according to an embodiment of the present disclosure;

10 is a longitudinal sectional view showing another example of a secondary cyclone of a multi-cyclone dust collector according to an embodiment of the present disclosure;

11 is a view showing a wireless stick cleaner having a multi-cyclone dust collector according to an embodiment of the present disclosure;

12 is a partial cross-sectional view showing a multi-cyclone dust collector installed in the wireless stick cleaner of FIG.

FIG. 13 is a view showing a robot cleaner having a multi-cyclone dust collector according to an embodiment of the present disclosure. FIG.

Hereinafter, exemplary embodiments of a multi-cyclone dust collector and a vacuum cleaner having the same will be described in detail with reference to the accompanying drawings.

Embodiments described below are shown by way of example in order to facilitate understanding of the present disclosure, and it should be understood that the present disclosure may be modified in various ways from the embodiments described herein. However, in the following description of the present disclosure, when it is determined that a detailed description of a related known function or component may unnecessarily obscure the subject matter of the present disclosure, the detailed description and specific illustration thereof will be omitted. In addition, the accompanying drawings may be exaggerated in dimensions of some of the components rather than drawn to scale to facilitate understanding of the disclosure.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms may be used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present disclosure, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

Terms used in the embodiments of the present disclosure may be interpreted as meanings commonly known to those skilled in the art unless otherwise defined.

In addition, terms such as 'front', 'back', 'top', 'bottom', 'top', and 'bottom' used in the present disclosure are defined based on the drawings, and the shape and The location is not limited.

The present disclosure is installed in a vacuum cleaner to separate the dirt and dust from the air containing dirt and dust (hereinafter referred to as dirt-containing air) sucked by the suction force generated by the suction motor to discharge the clean air to the outside It relates to a multi-cyclone dust collector.

1 is a perspective view of a multi-cyclone dust collector according to an embodiment of the present disclosure. FIG. 2 is a cross-sectional view of the multi-cyclone dust collector of FIG. 1 taken along line I-I, and FIG. 3 is a cross-sectional view of the multi-cyclone dust collector of FIG. 2 taken along line II-II.

1 to 3, the multi-cyclone dust collector 1 according to an embodiment of the present disclosure may include a primary cyclone 10 and a plurality of secondary cyclones 20.

The primary cyclone 10 is formed to separate the large-sized dirt and dust by using centrifugal force acting on the dirt-containing air by causing the introduced dirt-containing air to pivot. In the primary cyclone 10, the air from which dirt and dust are separated first is discharged to the plurality of secondary cyclones 20.

The primary cyclone 10 may be implemented by a housing 11 forming an exterior of the multi-cyclone dust collector 1 and an intermediate wall 12 installed inside the housing 11.

The housing 11 is formed in a substantially hollow cylindrical shape and includes a bottom 11a formed at one end. That is, the housing 11 is formed in the shape of a cylindrical container having a bottom 11a. On the outer circumferential surface of the housing 11, that is, the upper sidewall, an inlet 11b through which external dirt-containing air is introduced is provided. The inlet 11b of the housing 11 may communicate with the suction nozzle 170 (see FIG. 11) of the vacuum cleaner 100 through the extension tube 160 (see FIGS. 11 and 12). Therefore, dirt and dust on the surface to be sucked through the suction nozzle 170 are introduced into the primary cyclone 10 through the inlet 11b.

The intermediate wall 12 is formed in a hollow cylindrical shape and is installed concentrically with the housing 11 inside the housing 11. Since the intermediate wall 12 is spaced apart from the side wall of the housing 11 by a predetermined distance, a donut-shaped space is formed between the intermediate wall 12 and the housing 11. The dirt-containing air introduced into the inlet 11b of the housing 11 will pivot the space between the intermediate wall 12 and the side wall of the housing 11. The dirt and dust separated by the centrifugal force in the primary cyclone 10 are collected at the bottom 11a of the housing 11.

The intermediate wall 12 may include a porous member 13. The porous member 13 may be provided along the entire circumference of the intermediate wall 12 at an approximately middle portion in the longitudinal direction of the intermediate wall 12. The porous member 13 may be formed in a shape having a plurality of holes such as a grill, a filter, and the like to allow air to pass through and large dirt and dust not to pass through. The porous member 13 functions as an outlet through which air from which dirt and dust are first removed from the primary cyclone 10 is discharged. Accordingly, the interior space of the intermediate wall 12 may form an intermediate chamber 17 in which air discharged through the porous member 13 from the primary cyclone 10 collects.

A plurality of secondary cyclones 20 are installed inside the intermediate wall 12, that is, the intermediate chamber 17. Thus, the intermediate wall 12 partitions the plurality of secondary cyclones 20 and the primary cyclone 10.

The plurality of secondary cyclones 20 are formed to separate the fine dust from the air discharged from the primary cyclone 10. The air discharged from the primary cyclone 10 has a large dirt and dust removed and contains only fine dust.

In the present embodiment, as shown in FIG. 3, nine secondary cyclones 20 are arranged in a circular shape. Specifically, one secondary cyclone 20 is disposed in the center, and eight secondary cyclones 20 are arranged in a circle shape around the central secondary cyclone 20 (see FIG. 7). Such a structure can be applied to the case where the multi-cyclone dust collector 1 according to an embodiment of the present disclosure is used in the wireless stick cleaner 100 as shown in FIG. 11.

However, the number and arrangement of the secondary cyclone 20 is only one example, and the secondary cyclone 20 may be arranged in various forms in various numbers according to the vacuum cleaner to which the multi-cyclone dust collector 1 is applied. Of course.

The plurality of secondary cyclones 20 may each include a plurality of inlets 30 and one outlet 25. That is, one secondary cyclone 20 may include a plurality of inlets 30 and one outlet 25.

The plurality of inlets 30 are formed to protrude outward from the outer circumferential surface of the secondary cyclone 20 and are open toward the intermediate chamber 17. Specifically, each of the plurality of inlets 30 is formed to protrude outward from the outer peripheral surface of the body 21 of the secondary cyclone (20). In addition, each of the plurality of inlets 30 is formed in a tangential direction with respect to the secondary cyclone 20. That is, each inlet 30 is formed to protrude outward in a tangential direction with respect to the outer circumferential surface of the body 21 of the secondary cyclone 20. Thus, the air in the intermediate chamber 17 enters the secondary cyclone 20 in the tangential direction.

The outlet 25 is formed at the top of the secondary cyclone 20. Specifically, the outlet 25 is formed in the center of the upper end of the body 21 of the secondary cyclone 20. Each specific shape of the plurality of secondary cyclones 20 will be described in detail below.

Lower plates 15 that block the lower portion of the intermediate wall 12 are installed at the lower ends of the plurality of secondary cyclones 20. That is, the lower plate 15 is installed inside the intermediate wall 12, and the intermediate chamber in which the dust collecting chamber 40 and the plurality of secondary cyclones 20 are provided below the plurality of secondary cyclones 20 is installed. (17) is partitioned. The lower plate 15 is formed with a plurality of holes into which lower ends of the plurality of secondary cyclones 20 can be inserted.

The dust collecting chamber 40 is provided under the plurality of secondary cyclones 20 and is formed to collect fine dust separated from the plurality of secondary cyclones 20. The dust collecting chamber 40 may be formed of a dust collecting container 41 extending in a funnel shape upward from the central portion of the bottom 11a of the housing 11. The dust collecting container 41 may be surrounded by the intermediate wall 12 which extends downwardly beyond the lower plate 15.

In addition, the space around the outer circumference of the dust collecting container 41 of the bottom 11a of the housing 11 forms the waste collection chamber 44 in which the waste separated by the primary cyclone 10 is collected. The dust collecting chamber 40 is shielded by the dust collecting container 41 so as not to communicate with the waste collection chamber 44.

An upper plate 14 is provided at an upper end of the plurality of secondary cyclones 20 to block an upper portion of the intermediate wall 12. Top plate 14 blocks the top of the plurality of secondary cyclones 20. In addition, the upper plate 14 prevents a gap between the plurality of secondary cyclones 20 so that the intermediate chamber 17 provided with the plurality of secondary cyclones 20 is not in communication with the outside. Thus, the space surrounded by the intermediate wall 12, the upper plate 14, and the lower plate 15 forms an intermediate chamber 17 in which a plurality of secondary cyclones 20 are installed.

The upper plate 14 is provided with a plurality of outlets 25 corresponding to the plurality of secondary cyclones 20. The plurality of outlets 25 may be formed in a circular pipe shape. Therefore, when the upper plate 14 covers the upper ends of the plurality of secondary cyclones 20, the outlet 25 is positioned on the upper ends of the plurality of secondary cyclones 20, as shown in FIG. 2. Therefore, the air introduced into the intermediate chamber 17 is introduced into the inlet 30 of the plurality of secondary cyclones 20, is turned inside the secondary cyclone 30, and then discharged to the outside through the outlet 25. .

On the upper side of the plurality of secondary cyclones 20, the base 50, which functions as a passage of air discharged from the plurality of secondary cyclones 20, allows the multi-cyclone dust collector 1 to be fixed to a vacuum cleaner. To be prepared. The base 50 is in communication with a suction motor generating a suction force. The multi-cyclone dust collector 1 of the present embodiment may be installed in the stick wireless cleaner 100 as shown in FIG. 11 and the robot cleaner 200 as shown in FIG. 13.

The base 50 is formed in a substantially hollow cylindrical shape, the top plate 14 is installed at the lower end of the base 50, the upper end of the base 50 is open. Therefore, the air discharged from the outlet 25 of each of the plurality of secondary cyclones 20 passes through the inside of the base 50 and is discharged to the upper end of the base 50.

The intermediate wall 12 described above is formed to extend from the bottom of the base 50. In addition, the housing 11 may be installed to be detachable from the upper portion of the base 50 to the outside of the intermediate wall (12).

Hereinafter, each of a plurality of secondary cyclones of the multi-cyclone dust collector according to an embodiment of the present disclosure will be described in detail with reference to FIGS. 4 to 6. For reference, since the plurality of secondary cyclones 20 are all formed the same, the following description will be made based on one secondary cyclone 20.

4 is a perspective view illustrating a secondary cyclone of a multi-cyclone dust collector according to an exemplary embodiment of the present disclosure. 5 is a plan view of the secondary cyclone of FIG. 4, and FIG. 6 is a longitudinal cross-sectional view of the secondary cyclone of FIG. 4.

4 to 6, the secondary cyclone 20 according to the exemplary embodiment of the present disclosure may include a cylindrical portion 22, a truncated cone portion 23, and a top plate 24.

The cylindrical portion 22 is formed in a hollow cylindrical shape, a plurality of inlets 30 are provided on the outer circumferential surface of the cylindrical portion 22. The plurality of inlets 30 are formed to protrude outward from the outer circumferential surface of the cylindrical portion 22 of the secondary cyclone 20. In addition, each of the plurality of inlets 30 is formed in a tangential direction with respect to the outer circumferential surface of the cylindrical portion 22 of the secondary cyclone 20. That is, each of the plurality of inlets 30 protrudes outward from the outer circumferential surface of the cylindrical portion 22 of the secondary cyclone 20, and is formed in a tangential direction with respect to the outer circumferential surface of the cylindrical portion 22.

The plurality of inlets 30 are formed to contact the outer circumferential surface of the cylindrical portion 22 having the largest diameter. As described above, when the plurality of inlets 30 are formed on the outer circumferential surface of the cylindrical portion 22 having the maximum diameter of the secondary cyclone 20, separation efficiency can be maintained. In addition, when the plurality of inlets 30 are formed in the secondary cyclone 20, the pressure loss generated in the secondary cyclone 20 may be reduced than the secondary cyclone according to the related art having one inlet. In addition, when the plurality of inlets 30 are formed to protrude from the outer circumferential surface of the secondary cyclone 20, an air flow path is formed so that the air of the intermediate chamber 17 passes through the secondary cyclones 20 through the plurality of inlets 30. ) Can be drawn into the inside smoothly. In addition, since the plurality of inlets 30 are formed in a tangential direction on the outer circumferential surface of the secondary cyclone 20, air is drawn in a tangential direction into the interior of the secondary cyclone 20 through the plurality of inlets 30. The centrifugal force which acts on the air which rotates inside the cyclone 20 can be maximized.

The truncated cone portion 23 is provided at the lower end of the cylindrical portion 22, and is formed in a hollow. The lower end of the truncated cone portion 23 is open to form a dust outlet 26 through which the separated dust is discharged. In addition, the truncated cone portion 23 is integrally formed with the cylindrical portion 22 to form the body 21 of the secondary cyclone 20.

The upper plate 24 is installed at the upper end of the cylindrical portion 22, and is provided with an outlet 25 through which air introduced into the secondary cyclone 20 is discharged through the plurality of inlets 30. The upper plate 24 is formed in a disk shape corresponding to the cylindrical portion 22 so as to block the upper end of the cylindrical portion 22. The outlet 25 may be installed at the center of the upper plate 24. The outlet 25 may be formed as a discharge pipe 25a having a circular pipe shape of a predetermined length.

The upper plate 24 of the secondary cyclone 20 may be formed separately from the cylindrical portion 22 to facilitate the molding of the secondary cyclone 20. In addition, the cylindrical portion 22 including the plurality of inlets 30 may be integrally formed with the truncated cone portion 23. That is, the secondary cyclone 20 may be formed by separately forming the upper plate 24 including the outlet 25 from the body 21 having the truncated cone portion 23 and the cylindrical portion 22.

In the case of using a plurality of secondary cyclones 20 as in the present embodiment, as illustrated in FIG. 7, the plurality of cylindrical portions 22 and the truncated cone portion 23 are molded into one injection molded product M1. In addition, the plurality of upper plates 24 are shaped into one injection molded product M2 having a disc shape and having a plurality of discharge pipes 25a, that is, the upper plate 14, thereby forming the bodies 21 of the plurality of secondary cyclones 20. Can be coupled to the top of the injection molding (M1). When the upper ends of the plurality of secondary cyclones 20 are covered with the upper plate 14 as described above, the portion of the upper plate 14 corresponding to the upper end of each of the plurality of secondary cyclones 20 is the secondary cyclone 20 described above. The top plate 24 of () is formed. 7 is an exploded perspective view illustrating a state in which an upper body and an integrated body of a plurality of secondary cyclones of the multi-cyclone dust collector according to one embodiment of the present disclosure are separated.

8 is a schematic cross-sectional view of a mold for molding an injection molding forming a body of a plurality of secondary cyclones.

Referring to FIG. 8, the inner surface 21a of the secondary cyclone body 21 has a shape of no locking portion from the bottom to the top so that the core 302 of the upper mold 301 can be easily separated. In addition, the outer surface 21b of the secondary cyclone body 21 is formed in a shape without a locking portion from the upper end to the lower end so that the injection molded product M1 can be easily taken out from the lower mold 302. Therefore, the bodies 21 of the plurality of secondary cyclones 20 may be formed of one injection molded product M1 using one mold 300.

As such, when the bodies 21 of the plurality of secondary cyclones 20 are formed of one injection molded product M1, the number of parts is reduced as compared with the conventional art of forming the bodies of the secondary cyclones into two injection moldings. The problem of sealing can also be solved.

The plurality of inlets 30 are provided at regular intervals on the outer circumferential surface of the cylindrical portion 22 of the secondary cyclone 20. In the present embodiment, three inlets 30 are provided in the secondary cyclone 20, but this is only an example, and two or four or more inlets 30 may be formed.

In this case, the plurality of inlets 30 may be formed such that each cross-sectional area is less than or equal to the cross-sectional area of the outlet 25 of the secondary cyclone 20. That is, the cross-sectional area of one inlet 30 may be formed not to be larger than the cross-sectional area of the outlet 25 of the secondary cyclone 20.

In addition, as shown in FIG. 6, the plurality of inlets 30 are positioned at the same or higher position as the lower end 25b of the discharge pipe 25a that forms the outlet 25. Can be installed. In other words, the lower end 25b of the discharge pipe 25a is installed at the same or lower position as the lower end 34 of each of the plurality of inlets 30.

The plurality of inlets 30 may protrude from the plurality of openings 35 formed on the outer circumferential surface of the secondary cyclone 20 and the plurality of inlet ducts protruding from the outer circumferential surface of the secondary cyclone 20 and surround the plurality of openings 35. 31). That is, each inlet 30 of the secondary cyclone 20 may include an opening 35 formed at the upper end of the outer circumferential surface of the cylindrical portion 22 and an inlet duct 31 surrounding the opening 35.

The inlet duct 31 is formed in a substantially triangular pillar shape, and is formed to allow air to flow in a tangential direction with respect to the outer circumferential surface of the secondary cyclone 20. Specifically, as shown in Figure 4, the inlet duct 31 of the inlet guide wall 32, which is installed in a tangential direction with respect to the body 21 of the secondary cyclone 20, of the inlet guide wall 32 An upper wall 33 connecting the upper end and the upper end of the secondary cyclone 20, and installed in parallel with the upper wall 33, the lower end of the inflow guide wall 32 and the body of the secondary cyclone 20 ( 21 may include a lower wall 34 connecting the outer circumferential surface thereof. Thus, the inlet of the inlet duct 31 formed by the inlet guide wall 32, the upper wall 33, and the lower wall 34 is formed in a substantially rectangular shape. The area of the rectangle at the inlet of the inlet duct 31 can be referred to as the cross-sectional area of the inlet 30. Therefore, the area of the rectangle of the inlet of the inlet duct 31 can be formed below the cross-sectional area of the outlet 25 of the secondary cyclone 20.

The inflow guide wall 32 is formed into a substantially rectangular flat plate and is provided in a tangential direction with respect to the cylindrical portion 22 of the secondary cyclone 20. That is, the inflow guide wall 32 is provided in the tangential direction at one end of the opening 35 of the cylindrical portion 22 of the secondary cyclone 20.

The lower wall 34 is formed of a substantially triangular flat plate and connects the lower end of the inlet guide wall 32 and the side surface of the cylindrical portion 22 of the secondary cyclone 20. Accordingly, the side edge of the lower wall 34 in contact with the side surface of the cylindrical portion 22 may be formed in an arc shape corresponding to the cylindrical portion 22 of the secondary cyclone 20. Lower wall 34 forms the lower end of inlet 30. Accordingly, the lower wall 34 may be installed at the same or higher position as the lower end 25b of the discharge pipe 25a forming the discharge port 25.

The upper wall 33 is formed in a shape corresponding to the lower wall 34. That is, the upper wall 33 is formed in a substantially triangular flat plate, and connects the upper end of the inlet guide wall 32 and the upper end of the secondary cyclone 20, that is, the upper plate 24. Therefore, the side surface of the upper wall 33 in contact with the upper plate 24 may be formed in an arc shape corresponding to the upper plate 24 of the secondary cyclone 20. In this case, the upper wall 33 of the inlet duct 31 may be integrally formed with the upper plate 24 of the secondary cyclone 20. That is, as shown in FIG. 5, the upper wall 24 having a substantially triangular shape may protrude from the disk-shaped upper plate 24. In the present embodiment, three inlets 30 are provided, so that the upper plate 24 is integrally formed with three upper walls 33. As shown in the present embodiment, when the upper plate 24 of the secondary cyclone 20 is formed of one injection molding M2, that is, the upper plate 14, as shown in FIG. 7, the upper wall of the inlet duct 31 33 is formed as part of the upper plate 14.

When the multi-cyclone dust collector 1 according to an embodiment of the present disclosure is used for the stick wireless cleaner 100 shown in FIG. 11 or the robot cleaner 200 shown in FIG. 13, the multi-cyclone dust collector 1 is used. It is necessary to increase the suction force while making the size of the as small as possible.

To this end, the outer diameter D1 of the multi-cyclone dust collector 1 may be about 100 to 110 mm, and the outer diameter D2 of the intermediate chamber 17 in which the plurality of secondary cyclones 20 is installed may be about 75 to about 110 mm. It can be 85mm. In such a case, nine secondary cyclones 20 may be arranged as shown in FIG. 3. At this time, three of the plurality of inlets 30 formed in the secondary cyclone 20 is appropriate. In this case, although the secondary cyclone 20 may be formed to have two or four or more inlets 30, the pressure loss is greater than that of the three inlets 30. If the outer diameter D1 of the multi-cyclone dust collector 1 and the outer diameter D2 of the intermediate chamber 17 are made larger, the secondary cyclone 20 may be formed to have four inlets 30. have. However, the multi-cyclone dust collector 1 used in the stick cordless cleaner or the robot cleaner having the size limitation as in the present embodiment is formed such that each of the plurality of secondary cyclones 20 has three inlets 30. good.

9A to 9D are plan views illustrating a state in which a top plate is separated from a secondary cyclone of a multi-cyclone dust collector according to an exemplary embodiment of the present disclosure.

The opening 35 is secondary cyclone 20 equal to the side of the lower wall 34 of the inlet duct 31 in contact with the side of the cylindrical portion 22 of the secondary cyclone 20, as shown in FIG. 9A. It can be formed by cutting the side of the cylindrical portion (22).

As another example, however, adjustments 39, 39 ', 39 "may be provided in the opening 35 as shown in Figures 9B-9D. It is formed to extend toward the opening 35 at the side of the cylindrical portion 22 of the secondary cyclone 20 corresponding to the start end of 31. The adjusters 39, 39 ′, 39 ″ may adjust the cross-sectional area of the middle portion of the inlet duct 31 through which air entering the inlet duct 31 passes.

The adjusting unit 39 may be formed to extend along the side of the secondary cyclone 20, that is, along the imaginary circle 22a corresponding to the cylindrical unit 22, as shown in FIG. 9B. In this case, the adjusting unit 39 may reduce the area of the opening 35 as compared with the opening 35 of the secondary cyclone 20 shown in FIG. 9A.

Alternatively, as illustrated in FIG. 9C, the adjusting part 39 ′ may be inclined so that one end thereof faces the inflow guide wall 32 of the inflow duct 31. That is, the adjusting unit 39 ′ may be provided to be inclined outward from the virtual circle 22a corresponding to the cylindrical part 22. In this case, the gap G between the inlet guide wall 32 and one end of the adjusting part 39 ′ is narrower than that of the adjusting part 39 of FIG. 9B, so that the air flowing into the inlet duct 31 passes. The cross sectional area of 아 becomes narrow.

Alternatively, as shown in FIG. 9D, the adjusting part 39 ″ may be installed to be inclined so that one end thereof faces the inside of the secondary cyclone 20. That is, the adjusting part 39 ″ corresponds to the cylindrical part 22. It can be provided to be inclined to face inward from the virtual circle 22a. In this case, since the gap G between the inlet guide wall 32 and one end of the control unit 39 ″ is wider than that of the control unit 39 ′ of FIG. 9B, air introduced into the inlet duct 31 passes. The cross-sectional area of the passage becomes wider. In the above, the distance G between the inlet guide wall 32 and one end of the adjusting portions 39, 39 ', 39 "is one end of the adjusting portions 39, 39', 39". Refers to the length of the straight line perpendicular to the inlet guide wall (32).

In the above, as shown in FIGS. 4 and 6, the case in which the body 21 of the secondary cyclone 20 is formed of the cylindrical portion 22 and the truncated cone portion 23 has been described. The shape of the body 21 is not limited thereto.

The body 21 ′ of the secondary cyclone 20 may be formed only as a truncated cone without a cylindrical part as shown in FIG. 10. In this case, the plurality of inlets 30 are formed at the upper end of the side of the truncated cone portion 21 ', and the outlet 25 is provided at the top plate 24 installed at the upper end of the truncated cone portion 21'. Since the shape of the inlet duct 31 and the outlet 25 forming the inlet 30 may be similar to or identical to the inlet duct 31 and outlet 25 of the secondary cyclone 20 described above, Description is omitted.

Hereinafter, the operation of the multi-cyclone dust collector according to an embodiment of the present disclosure having the above structure will be described with reference to FIG. 2.

The dirt-containing air is introduced into the primary cyclone 10 through the inlet 11b (arrow A). The dirt-containing air drawn into the inlet 11b is pivoted inside the primary cyclone 10. While dirt-containing air is turning inside the primary cyclone 10, dirt is separated by centrifugal force. Specifically, the waste-containing air is introduced into the housing 11 through the inlet 11b provided at one side of the housing 11 to form the primary cyclone 10 and the side wall and the intermediate wall 12. You will be turning the space between). At this time, the dirt and dust contained in the dirt-containing air by the centrifugal force is separated to fall to the dirt collection chamber 44 formed on the bottom (11a) of the housing 11 to collect.

The dirt-free air is introduced into the intermediate chamber 17 through the porous member 13 provided in the intermediate wall 12 (arrow B).

In the intermediate chamber 17, a plurality of inlets 30 of the plurality of secondary cyclones 20 are opened. Therefore, the air introduced into the intermediate chamber 17 is introduced into the body 21 of the plurality of secondary cyclones 20 through the plurality of inlets 30 of the plurality of secondary cyclones 20 (arrow C) . At this time, since one secondary cyclone 20 is provided with a plurality of inlets 30, in this embodiment, three inlets 30 are provided, one secondary cyclone 20 is provided with three inlets 30. Air is drawn in. As such, air is introduced into the secondary cyclone 20 through the plurality of inlets 30, thereby reducing the pressure loss.

The air drawn through the plurality of inlets 30 of the secondary cyclone 20 is pivoted inside the secondary cyclone 20. Therefore, the fine dust is separated by the centrifugal force acting on the air turning inside the secondary cyclone 20. The separated fine dust descends along the body 21 of the secondary cyclone 20 and falls into the dust collecting chamber 40 through the dust outlet 26.

Air from which the fine dust is removed from the plurality of secondary cyclones 20 is discharged to the base 50 through the outlet 25 of each of the plurality of secondary cyclones 20 (arrow D).

Air discharged to the base 50 is discharged to the outside of the multi-cyclone dust collector 1 through the upper end of the base 50 (arrow E).

The dust collected in the waste collection chamber 44 of the housing 11 and the fine dust collected in the dust collecting container 41 may be separated and discarded from the base 50.

In the multi-cyclone dust collector 1 according to the embodiment of the present disclosure having the structure as described above, air is introduced into each of the plurality of secondary cyclones 20 through the plurality of inlets 30, thereby maintaining separation efficiency. Pressure loss can be reduced.

The inventors of the present invention have a multi-cyclone dust collector and a plurality of secondary cyclones 20 according to the prior art, each of which has one inlet and one outlet, each of which has three inlets 30 and one outlet 25. An experiment was conducted to compare the separation efficiency and the pressure loss of the multi-cyclone dust collector 1 according to the embodiment of the present disclosure. The experimental results are shown in Table 1 below.

division Motor capacity (W) Separation efficiency Pressure loss Prior art 550 99% 175 mmH ₂ O The present disclosure 550 99% 90 mmH ₂ O

As can be seen in Table 1, the multi-cyclone dust collector 1 according to an embodiment of the present disclosure has a separation efficiency of 99% in a vacuum cleaner using a motor of the same capacity, the multi-cyclone dust collector according to the prior art While maintaining the same as the device, it can be seen that the pressure loss is reduced from 175 mmH ₂ O to 90 mmH ₂ O. Therefore, by increasing the number of inlets 30 of the secondary cyclone 20 as in the multi-cyclone dust collector 1 according to the present disclosure, it is possible to reduce the pressure loss to improve the performance of the vacuum cleaner. A vacuum cleaner having a multi-cyclone dust collector according to an embodiment of the present disclosure will be described.

First, a case in which the multi-cyclone dust collector according to an embodiment of the present disclosure is applied to a wireless stick cleaner will be described.

11 is a view showing a wireless stick cleaner having a multi-cyclone dust collector according to an embodiment of the present disclosure, Figure 12 is a partial cross-sectional view showing a multi-cyclone dust collector installed in the wireless stick cleaner of FIG.

11 and 12, the wireless stick cleaner 100 according to an embodiment of the present disclosure may include a main body 110, a multi-cyclone dust collector 1, and an extension tube 160.

The main body 110 includes a suction motor 120 generating a suction force, a handle 130 capable of holding the wireless stick cleaner 100, a battery 140 supplying power to the suction motor 120, and an extension tube 160. It may include a connecting portion 150 that can be connected.

One side of the suction motor 120 is provided with a mounting portion 121 on which the base 50 of the multi-cyclone dust collector 1 is mounted. Therefore, the air from which dirt and dust are removed while passing through the multi-cyclone dust collector 1 is discharged to the outside of the wireless stick cleaner 100 through the suction motor 120.

The handle 130 is installed on the top of the wireless stick cleaner 100, and is formed to be gripped by a user to manipulate the wireless stick cleaner 100. The handle 130 may be provided with a switch (not shown) for turning on / off the power of the wireless stick cleaner 100.

The battery 140 may be a rechargeable battery that can be charged using an external power source.

One end 151 of the connecting portion 150 is formed to be detachable extension tube 160, the other end 152 is formed to communicate with the inlet (11b) of the primary cyclone 10 of the multi-cyclone dust collector (1). do. Between the one end 151 and the other end 152 of the connection portion 150 is provided with a connection passage 153 through which dirt-containing air sucked from the outside can pass. Therefore, when the extension pipe 160 is installed at one end 151 of the connection part 150, external air is introduced into the multi-cyclone dust collector 1 through the extension pipe 160 and the connection passage 153.

One end of the extension tube 160 is formed to be connected to the connection portion 150 of the main body 110, the other end may be provided with a suction nozzle 170 for moving along the surface to be cleaned, and sucks the dirt of the surface to be cleaned.

When the power of the wireless stick cleaner 100 is turned on, the suction motor 120 rotates to generate a suction force. When the suction force is generated, dirt-containing air including dirt and dust on the surface to be cleaned is introduced into the extension pipe 160 through the suction nozzle 170.

The waste-containing air introduced into the extension pipe 160 is introduced into the inlet 11b of the multi-cyclone dust collector 1 through the connection portion 150 of the main body 110.

The dirt-containing air introduced into the inlet 11b of the multi-cyclone dust collector 1 is swiveled in the primary cyclone 10. While the dirt-containing air is turning in the primary cyclone 10, the dirt is separated by the centrifugal force and collected at the bottom 11a of the housing 11.

The air from which the dirt is separated is introduced into the plurality of secondary cyclones 20 provided in the intermediate chamber 17 through the porous member 13 provided in the intermediate wall 12. At this time, air is introduced into the secondary cyclone 20 through the plurality of inlets 30 provided in each of the plurality of secondary cyclones 20.

While the air introduced through the plurality of inlets 30 is pivoted inside the plurality of secondary cyclones 20, fine dust is separated by centrifugal force and falls along the body of the secondary cyclone 20. The fine dust separated from the secondary cyclone 20 is collected into the dust collecting chamber 40 through the dust outlet.

The fine dust is separated and clean air is discharged to the base 50 through the plurality of outlets 25 of the plurality of secondary cyclones (20). Since the base 50 is connected to the suction motor 120, the air discharged to the base 50 is discharged to the outside of the wireless stick cleaner 100 through the suction motor 120.

FIG. 13 is a view illustrating a robot cleaner having a multi-cyclone dust collector according to an embodiment of the present disclosure.

Referring to FIG. 13, the robot cleaner 200 according to an embodiment of the present disclosure may include a cleaner body 210 and a suction nozzle 240.

The cleaner body 210 may include a multi-cyclone dust collector 1 for collecting the incoming dirt and a suction motor 230 for generating a suction force capable of sucking the dirt. In addition, the cleaner body 210 is a position where the plurality of wheels 211 for moving the robot cleaner 200, a driving unit (not shown) for driving the plurality of wheels, and the position of the robot cleaner 200 can be recognized. A detection sensor (not shown), a driving unit and a control unit (not shown) for controlling the suction motor 230 may be included. Therefore, the controller may control the robot cleaner 200 to autonomously travel and clean the surface to be cleaned using the suction motor 230 and the multi-cyclone dust collector 1.

The multi-cyclone dust collector 1 separates and collects dirt from air containing dirt sucked by suction power generated by the suction motor 230, and discharges the air from which dirt is removed to the suction motor 230 through an outlet. do. As described above, the multi-cyclone dust collector 1 includes a primary cyclone 10 and a plurality of secondary cyclones 20.

A suction nozzle 240 is connected to the inlet 11b (see FIG. 2) of the multi-cyclone dust collector 1. The suction nozzle 240 may be installed to be rotatable with respect to the cleaner body 210.

The suction motor 230 is connected to the multi-cyclone dust collector 1, and generates a suction force for allowing air to be sucked together with the dirt into the multi-cyclone dust collector 1. The suction port 231 of the suction motor 230 is connected to the base 50 (see FIG. 1) of the multi-cyclone dust collector 1.

The cleaner body 210 is provided with a fixing unit 220 in which the suction motor 230 may be installed, and a discharge port through which the air passing through the suction motor 230 may be discharged on one side of the fixing unit 220. 221 is provided.

Therefore, when the controller of the robot cleaner 200 turns on the suction motor 230, the impeller of the suction motor 230 rotates to generate suction force. Then, the dirt and dust on the surface to be cleaned are sucked together with the air through the suction nozzle 240 and separated and collected by the multi-cyclone dust collector 1. The air from which dirt is removed is discharged from the multi-cyclone dust collector 1, and is discharged to the outside of the cleaner body 210 through the inlet motor 230 through the outlet 221 of the cleaner body 210.

The present disclosure has been described above by way of example. The terminology used herein is for the purpose of description and should not be regarded as limiting. Many modifications and variations of the present disclosure are possible in light of the above teachings. Accordingly, unless otherwise indicated, the present disclosure may be embodied freely within the scope of the claims.

Claims (15)

A primary cyclone configured to first separate the dirt from the introduced dirt-containing air; And And a plurality of secondary cyclones installed inside the primary cyclone and formed to separate fine dust from the air discharged from the primary cyclone, each of which includes a plurality of inlets and one outlet. The plurality of inlets provided in each of the plurality of secondary cyclones protrude outward from the body of each of the plurality of secondary cyclones, is formed in a direction tangential to the outer peripheral surface of each of the plurality of secondary cyclones, multi-cyclone dust collector. The method of claim 1, The plurality of inlets are provided on the upper end of the outer peripheral surface of each of the plurality of secondary cyclones, multi-cyclone dust collector. The method of claim 2, Each of the plurality of secondary cyclones, A hollow cylindrical portion provided with the plurality of inlets; A hollow truncated cone portion provided at a lower end of the hollow cylindrical portion; And And a top plate installed at an upper end of the cylindrical part and provided with the discharge port. The method of claim 3, wherein The cylindrical portion and the truncated cone portion is formed integrally, The upper plate is formed separately from the cylindrical portion, multi-cyclone dust collector. The method of claim 3, wherein And the plurality of inlets comprises an inlet duct formed such that air can be introduced in a tangential direction to the outer circumferential surface of the cylindrical portion. The method of claim 1, And said plurality of inlets are formed such that their respective cross-sectional area is less than or equal to the cross-sectional area of said outlet. The method of claim 1, Each of the plurality of inlets, An opening formed in each of the plurality of secondary cyclones; And And an inlet duct formed to surround the opening. The method of claim 7, wherein The inlet duct, An inflow guide wall tangential to the outer circumferential surface of the secondary cyclone; An upper wall connecting an upper end of the inflow guide wall and an upper end of the secondary cyclone; And And a lower wall installed in parallel with the upper wall and connecting a lower end of the inflow guide wall and an outer circumferential surface of the secondary cyclone. The method of claim 8, Each of the plurality of inlets further comprises a control unit extending toward the opening in the outer peripheral surface of the secondary cyclone corresponding to the start end of the inlet duct; Multi-cyclone dust collector. The method of claim 9, The adjusting unit extends along a virtual circle corresponding to the outer circumferential surface of the secondary cyclone, multi-cyclone dust collector. The method of claim 1, The outlet of the secondary cyclone includes a discharge pipe, The lower end of the discharge pipe is located at the same or lower position than the lower end of each of the plurality of inlet pipe, multi-cyclone dust collector. The method of claim 1, The primary cyclone discharges air into the intermediate chamber, And a plurality of inlets of each of said plurality of secondary cyclones are arranged to open toward said intermediate chamber. The method of claim 1, A housing forming the primary cyclone; An intermediate wall installed inside the housing and partitioning the plurality of secondary cyclones and the housing; A dust collecting chamber disposed under the plurality of secondary cyclones and collecting fine dust separated from the plurality of secondary cyclones; A lower plate installed inside the intermediate wall to partition between the lower ends of the plurality of secondary cyclones and the dust collecting chamber; And And a top plate installed at an upper end of the plurality of secondary cyclones to close the spaces between the plurality of secondary cyclones. The method of claim 13, A portion of the intermediate wall between the upper plate and the lower plate is a multi-cyclone dust collector, a porous member is installed along the perimeter. Suction nozzles; A multi-cyclone dust collector connected to the suction nozzle; And And a suction motor connected to the multi-cyclone dust collector and generating suction force. The multi-cyclone dust collector, A primary cyclone configured to first separate the dirt from the introduced dirt-containing air; And And a plurality of secondary cyclones installed inside the primary cyclone and formed to separate fine dust from the air discharged from the primary cyclone, each of which includes a plurality of inlets and one outlet. The plurality of inlets provided in each of the plurality of secondary cyclones protrude outward from the body of each of the plurality of secondary cyclones, and formed in a direction tangential to the outer circumferential surface of the body.

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