WO2022225215A1

WO2022225215A1 - Multi-cyclone dust collection device and vacuum cleaner comprising same

Info

Publication number: WO2022225215A1
Application number: PCT/KR2022/004370
Authority: WO
Inventors: 최인규; 차승용; 김시현; 김현철; 이현주; 이현호
Original assignee: 삼성전자주식회사
Priority date: 2021-04-19
Filing date: 2022-03-29
Publication date: 2022-10-27
Also published as: US20230355060A1; KR20220144133A

Abstract

In a multi-cyclone dust collection device and a vacuum cleaner comprising same, the multi-cyclone dust collection device comprises: a primary cyclone separator for primarily separating refuse from influent air containing refuse; and a secondary cyclone separator which is provided in the primary cyclone separator and which separates dust from the air discharged from the primary cyclone separator. The secondary cyclone separator includes: a secondary cyclone including at least two inlets into which air flows and an outlet through which the influent air is discharged; and an upper cover which is a cover for covering the upper end of the secondary cyclone and which includes a discharge pipe inserted into the outlet to discharge the air. The upper cover further includes a plurality of flow guides arranged between the inlets, which are adjacent to each other, to minimize air flow interference between the inlets adjacent to each other, and provided on the outer surface of the discharge pipe to correspond to the at least two inlets.

Description

Multi-cyclone dust collector and vacuum cleaner equipped therewith

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

Instead of a wired vacuum cleaner that supplies electricity by connecting a wire to an external power source, a wireless vacuum cleaner that operates using electricity output from a built-in battery without connecting a wire to an external power source is widely used.

In such a wireless 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 and collects dirt and dust from air containing dirt introduced from the outside, and a plurality of secondary cyclones that separate fine dust from air discharged from the primary cyclone.

In the case of a secondary cyclone, pressure loss may occur due to the pressure difference between the air entering the inlet and the air leaving the outlet.

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

One aspect of the present disclosure provides a multi-cyclone dust collector capable of minimizing pressure loss and air flow loss in a secondary cyclone, and a vacuum cleaner having the same.

A multi-cyclone dust collector according to an aspect of the present disclosure includes: a primary cyclone separator provided to first separate dirt from incoming dirt-containing air; and

and a secondary cyclone separator installed inside the primary cyclone separator and provided to separate dust from the air discharged from the primary cyclone separator, wherein the secondary cyclone separator includes at least a secondary cyclone provided with two inlets and an outlet for discharging the introduced air; and an upper cover that covers the upper end of the secondary cyclone and includes a discharge pipe inserted into the outlet to discharge the air, wherein the upper cover interferes with the flow of air between adjacent inlets. It is disposed between the inlets adjacent to each other to minimize the flow, a plurality of flow guides provided to correspond to the at least two inlets on the outer surface of the discharge pipe; further includes.

The at least two inlets are provided on the upper end of the outer peripheral surface of the body so as to protrude outward from the body of the secondary cyclone, and the plurality of flow guides are located higher than the lower end of the discharge pipe so as to correspond to the at least two inlets. can be provided in

Each of the plurality of flow guides may include a guide surface extending toward the lower end of the discharge pipe to guide the air introduced into each of the at least two inlets to move to the lower end of the discharge pipe.

The at least two inlets are formed in a tangential direction with respect to the outer circumferential surface of each of the secondary cyclones, and one of the plurality of flow guides is a guide surface provided to guide the air introduced into one of the at least two inlets. may include

Each of the at least two inlets includes an opening formed in each body of the secondary cyclone and an inlet duct formed to surround the opening so that air can be introduced in a tangential direction with respect to the outer circumferential surface of the body, the guide surface Silver, may be provided to face the opening of the corresponding inlet.

The guide surface may extend downwardly from one end to the other end, and may be formed to move away from the corresponding inlet from the one end to the other end.

The guide surface may have a spiral shape along the circumference of the discharge pipe.

The guide surface may be provided to be inclined with respect to the tangential direction.

The one flow guide has a blocking surface provided on a side opposite to the guide surface facing the one inlet so as to block the movement of air introduced from the inlet adjacent to the one inlet from moving toward the one inlet. may include

The blocking surface may extend in a direction parallel to the extension direction of the discharge pipe from one end to the other end.

The other end of the guide surface and the other end of the blocking surface may be in contact with each other.

The flow guide may further include a cover surface covering between the guide surface and the blocking surface, and the guide surface, the blocking surface, and the cover surface may be integrally formed.

The secondary cyclones may be provided in plurality, and the upper cover may be provided to cover upper portions of the plurality of secondary cyclones and may include a plurality of discharge pipes corresponding to the plurality of secondary cyclones.

The plurality of secondary cyclones includes a central cyclone provided to correspond to the center of the upper cover, and eight peripheral cyclones provided to correspond to the circumference of the upper cover, and the first cyclone has four inlets. , each of the second cyclones may have three inlets.

A vacuum cleaner having a multi-cyclone dust collector 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 suction force, wherein the multi-cyclone dust collector includes: a primary cyclone separator provided to first separate dirt from the incoming waste-containing air; and a secondary cyclone separator installed inside the primary cyclone separator and provided to separate dust from the air discharged from the primary cyclone separator, wherein the secondary cyclone separator includes, a secondary cyclone provided with at least two inlets and an outlet for discharging the introduced air; and an upper cover that covers the upper end of the secondary cyclone and includes a discharge pipe inserted into the outlet to discharge the air, wherein the upper cover interferes with the flow of air between adjacent inlets. It is disposed between the inlets adjacent to each other to minimize the flow, a plurality of flow guides provided to correspond to the at least two inlets on the outer surface of the discharge pipe; further includes.

The guide surface extends downward from one end to the other end, is formed to be farther from the corresponding inlet from the one end to the other end, and may have a spiral shape along the circumference of the discharge pipe.

The body includes a hollow cylindrical portion provided with the at least two inlets and a hollow truncated cone portion provided at a lower end of the hollow cylindrical portion, wherein the cylindrical portion and the truncated cone portion are integrally formed, and the upper cover includes the It may be formed separately from the cylindrical part.

According to an embodiment of the present disclosure, it is possible to improve the collection efficiency of the multi-cyclone dust collector by minimizing the pressure loss and the air flow loss in the secondary cyclone.

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

Figure 2 is a cross-sectional view showing the multi-cyclone dust collector of Figure 1 cut along II-II'.

Figure 3 is a cross-sectional view showing the multi-cyclone dust collector of Figure 2 cut along ²-²'.

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

5 is a longitudinal cross-sectional view of the secondary cyclone of FIG.

6 is an exploded perspective view illustrating a state in which an integral body of a plurality of secondary cyclones and an upper cover of the multi-cyclone dust collector according to an embodiment of the present disclosure are separated.

Figure 7 is a view showing the secondary cyclone of Figure 6;

8 is a view of the secondary cyclone of FIG. 7 observed from the other side.

9 is a view showing another example of the secondary cyclone of the multi-cyclone dust collector according to an embodiment of the present disclosure.

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

11 is a partial cross-sectional view illustrating a multi-cyclone dust collector installed in the vacuum cleaner of FIG. 10;

The configuration shown in the embodiments and drawings described in this specification is only a preferred example of the disclosed invention, and there may be various modifications that can replace the embodiments and drawings of the present specification at the time of filing of the present application.

In addition, the same reference numbers or reference numerals in each drawing in the present specification indicate parts or components that perform substantially the same functions.

In addition, the terms used herein are used to describe the embodiments, and are not intended to limit and/or limit the disclosed invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In addition, terms including an ordinal number such as "first", "second", etc. used herein may be used to describe various elements, but the elements are not limited by the terms, and the terms are It is used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The term “and/or” includes a combination of a plurality of related listed items or any of a plurality of related listed items.

Hereinafter, an embodiment will be described in detail with reference to the accompanying drawings.

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

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

The primary cyclone separator 10 is formed to primarily separate large-sized dirt and dust using centrifugal force acting on the dirt-containing air by causing the incoming dirt-containing air to rotate. In the primary cyclone separator 10 , the air from which dirt and dust are primarily separated is discharged to the secondary cyclone separator 20 .

The primary cyclone separator 10 may be implemented by the housing 11 forming the exterior of the multi-cyclone dust collector 1 and the 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 a cylindrical container shape with a bottom 11a. An inlet 11b through which external dirt-containing air is introduced is provided on the outer peripheral surface of the housing 11, that is, on the upper side of the side wall. The inlet 11b of the housing 11 may communicate with the suction nozzle 170 (see FIG. 10 ) of the vacuum cleaner 100 through the extension pipe 160 (see FIGS. 10 and 11 ). Therefore, dirt and dust on the surface to be cleaned sucked through the suction nozzle 170 is introduced into the primary cyclone separator 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 soil-containing air introduced into the inlet 11b of the housing 11 circulates in the space between the intermediate wall 12 and the sidewall of the housing 11 . Dirt and dust separated by centrifugal force in the primary cyclone separator 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, etc. to pass air and not pass large-sized dirt and dust. The porous member 13 functions as an outlet through which the air from which dirt and dust are primarily removed in the primary cyclone separator 10 is discharged. Accordingly, the inner space of the intermediate wall 12 may form an intermediate chamber 17 in which the air discharged through the porous member 13 in the primary cyclone separator 10 is collected.

A secondary cyclone separator 20 is installed inside the intermediate wall 12 , that is, in the intermediate chamber 17 . Accordingly, the intermediate wall 12 divides the secondary cyclone separator 20 and the primary cyclone separator 10 .

The secondary cyclone separator is formed to separate fine dust from the air discharged from the primary cyclone separator 10 . The air discharged from the primary cyclone separator 10 is in a state containing only fine dust while large-sized dirt and dust are removed.

The secondary cyclone separator 20 includes a secondary cyclone 20' and an upper cover 14 covering an upper end of the secondary cyclone 20'.

The 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 opened toward the intermediate chamber 17 . Specifically, each of the plurality of inlets 30 is formed to protrude outward from the outer circumferential 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 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'. Accordingly, the air in the intermediate chamber 17 is drawn into the secondary cyclone 20' in a 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').

A lower plate 15 blocking the lower portion of the intermediate wall 12 is installed at the lower end of the secondary cyclone 20 ′. That is, the lower plate 15 is installed inside the intermediate wall 12 , and the dust collection chamber 40 provided under the secondary cyclone 20 ′ and the intermediate chamber 17 in which the secondary cyclone 20 ′ is installed. ) between them. A hole into which the lower end of the secondary cyclone 20' can be inserted is formed in the lower plate 15 .

The dust collection chamber 40 is provided under the secondary cyclone 20', and is formed to collect fine dust separated from the secondary cyclone 20'. The dust collecting chamber 40 may be formed as a dust collecting container 41 extending upwardly in a substantially funnel shape from the center of the bottom 11a of the housing 11 . The dust collecting container 41 may be surrounded by an intermediate wall 12 extending down a certain length beyond the lower plate 15 .

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

The upper cover 14 covering the upper end of the secondary cyclone 20 ′ is provided to block the upper portion of the intermediate wall 12 . The upper cover 14 blocks the upper end of the body 21 of the secondary cyclone 20' so that the intermediate chamber 17 in which the secondary cyclone 20' is installed does not communicate with the outside. Accordingly, the space surrounded by the intermediate wall 12, the upper cover 14, and the lower plate 15 forms the intermediate chamber 17 in which the body 21 of the secondary cyclone 20' is disposed.

The upper cover 14 may include an upper plate 14a, a discharge pipe 25a, and a plurality of flow guides 70 . The plurality of flow guides 70 will be described later.

Since the upper plate 14a is located inside the primary cyclone 10, it may be provided in a disk shape, but is not limited thereto and may be provided in various shapes.

The discharge pipe 25a may be provided to correspond to the secondary cyclone 20'. The discharge pipe 25a may extend downward from the upper plate 14a. The discharge pipe 25a may be formed in a circular pipe shape. Accordingly, when the upper cover 14 covers the upper end of the secondary cyclone 20', the discharge pipe is inserted into the outlet of the secondary cyclone 20' as shown in FIG. 2, so that the upper end of the secondary cyclone 20' The exhaust pipe is located in Therefore, the air introduced into the intermediate chamber 17 is introduced into the inlet 30 of the plurality of secondary cyclones 20 ′, turns inside the secondary cyclone 30 , and then discharged to the outside through the discharge pipe 25a . do.

On the upper side of the secondary cyclone 20', a base 50 is provided that functions as a passage for air discharged from the secondary cyclone 20', and allows the multi-cyclone dust collector 1 to be fixed to the vacuum cleaner. . The base 50 communicates with a suction motor that generates a suction force. The multi-cyclone dust collector 1 of this embodiment may be installed in the wireless vacuum cleaner 100 as shown in FIG. 11 .

The base 50 is formed in a substantially hollow cylindrical shape, the upper cover 14 is installed at the lower end of the base 50, and the upper end of the base 50 is open. Accordingly, the air discharged from the discharge pipe 25a of the secondary cyclone 20 ′ passes through the interior of the base 50 and is discharged to the upper end of the base 50 .

The above-described intermediate wall 12 is formed to extend from the lower end of the base 50 . In addition, the housing 11 may be detachably installed on the upper portion of the base 50 to the outside of the intermediate wall 12 .

One or more secondary cyclones 20' may be provided, and in this case, the upper cover 14 may be provided to cover the upper part of the secondary cyclones 20'.

As shown in FIG. 3 , a plurality of secondary cyclones 20 ′ may be provided, and nine secondary cyclones 20 ′ may be provided and arranged in a circular shape. Specifically, one secondary cyclone (central cyclone, 20'c) is arranged in the center, and eight secondary cyclones (peripheral cyclone, 20'd) are arranged in a circular shape around the central cyclone 20'c. It may be in the form that has been used (see FIG. 6). Such a structure may be applied when the multi-cyclone dust collector 1 according to an embodiment of the present disclosure is used in the vacuum cleaner 100 as shown in FIG. 10 .

However, the number and arrangement of these secondary cyclones 20' is only an example, and depending on the wireless vacuum cleaner to which the multi-cyclone dust collector 1 is applied, the secondary cyclones 20' may be arranged in various numbers and in various shapes. It is of course possible to

Hereinafter, each of the 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 and 5 . For reference, since all of the plurality of secondary cyclones 20' are identically formed, the following description will be made based on one secondary cyclone 20'.

4 is a perspective view showing a secondary cyclone of a multi-cyclone dust collector according to an embodiment of the present disclosure, FIG. 5 is a longitudinal cross-sectional view of the secondary cyclone of FIG. 4, and FIG. 6 is a multi-cyclone according to an embodiment of the present disclosure. It is an exploded perspective view showing a state in which the body and the upper cover of the plurality of secondary cyclones of the cyclone dust collector are separated.

4 to 6 , each of the plurality of secondary cyclones 20 ′ according to an embodiment of the present disclosure may include a cylindrical portion 22 and a truncated cone portion 23 , and an upper cover 14 . The upper end may be covered by the upper plate 24 that is a part of the.

The cylindrical portion 22 is formed in a hollow cylindrical shape, and a plurality of inlets 30 are provided on the outer peripheral 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 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 to the outer circumferential surface of the cylindrical portion 22 .

The plurality of inlets 30 are formed to be in contact with the outer circumferential surface of the cylindrical portion 22 having the maximum diameter. In this way, if 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', the separation efficiency can be maintained. In addition, if a plurality of inlets 30 are formed in the secondary cyclone 20 ′, the pressure loss occurring in the secondary cyclone 20 ′ can be reduced compared to the secondary cyclone according to the prior 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 in the intermediate chamber 17 flows through the plurality of inlets 30 into the secondary cyclone ( 20') can be smoothly introduced into the interior. 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 tangentially introduced into the interior of the secondary cyclone 20' through the plurality of inlets 30. The centrifugal force acting on the air swirling inside the secondary 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 shape. The lower end of the truncated cone 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 on the upper end of the cylindrical portion 22, and an outlet 25 through which the air introduced into the secondary cyclone 20 ′ is discharged through the plurality of inlets 30 is provided.

The upper plate 24 may be formed to block the upper end of the cylindrical portion 22 . The upper plate 24 is a part of the upper cover 14, and the shape may be variously designed and changed.

The outlet 25 may be installed in 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 certain length.

The upper plate 24 may be formed separately from the cylindrical portion 22 so as to facilitate the formation 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 molding the upper plate 24 including the outlet 25 from the body 21 including the truncated cone part 23 and the cylindrical part 22 .

6, the plurality of inlets 30 are provided at regular intervals on the outer peripheral 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 the inlet 30 may be formed in two or four or more.

The plurality of inlets 30 are a plurality of openings 35 formed on the outer peripheral surface of the secondary cyclone 20' and a plurality of inflows formed to surround the plurality of openings 35 protruding from the outer peripheral surface of the secondary cyclone 20'. A duct 31 may be included. 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 column shape, and is formed to introduce air in a tangential direction to the outer circumferential surface of the secondary cyclone 20 ′. Specifically, as shown in FIG. 4 , the inlet duct 31 includes an inlet guide wall 32 installed in a tangential direction with respect to the body 21 of the secondary cyclone 20 ′, and an inlet guide wall 32 . It may include a lower wall 34 connecting the lower end of the secondary cyclone 20' to the outer circumferential surface of the body 21 of the secondary cyclone (20').

The upper end of the inlet guide wall 32 may be connected to the upper plate 24 . Accordingly, the inlet of the inlet duct 31 formed by the upper plate 24 and the inlet guide wall 32 and the lower wall 34 is formed in a substantially rectangular shape.

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

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

When the multi-cyclone dust collector 1 according to an embodiment of the present disclosure is used in the wireless vacuum cleaner 100 shown in FIG. 11, it is desirable to make the size of the multi-cyclone dust collector 1 as small as possible while increasing the suction power. need.

Nine of the plurality of secondary cyclones 20 ′ may be arranged as shown in FIG. 3 . At this time, the plurality of inlets 30 formed in the secondary cyclone 20 ′ are three suitable. In this case, the secondary cyclone 20 ′ may be formed to have two or four or more inlets 30 , but a greater pressure loss may occur than in the case of having three inlets 30 . Therefore, the multi-cyclone dust collector 1 used in the wireless vacuum cleaner having a size limitation as in this embodiment is preferably formed so that each of the plurality of secondary cyclones 20 ′ has three inlets 30 .

However, it is appropriate that the central cyclone 20'c corresponding to the center of the upper cover 14 of the secondary cyclone separator 20 has four inlets. Considering that each of the eight peripheral cyclones 20'd disposed to correspond along the periphery of the upper cover 14 to the periphery of the central cyclone 20'c has three inlets 30, the central cyclone 20 'c) can make the air flow more smoothly when it has four inlets 30 .

When including a plurality of secondary cyclones 20' as described above, the upper plate 24, which is a part of the upper cover 14 corresponding to the upper end of each of the plurality of secondary cyclones 20', is a plurality of 2 An upper cover 14 covering the upper end of the primary cyclone 20 ′ may be formed.

On the other hand, when one secondary cyclone 20 ′ is provided, the upper plate 24 corresponding to the upper end of one secondary cyclone 20 ′ may be the above-described upper cover 14 .

7 is a view showing the secondary cyclone of FIG. 6, FIG. 8 is a view of the secondary cyclone of FIG. 7 observed from the other side, and FIG. It is a diagram showing another example of a primary cyclone.

7 and 8 , the plurality of flow guides 70 are provided to correspond to and protrude at least two inlets 30 on the outer surface of the discharge pipe 25a, and interfering with the flow of air between the inlets 30 adjacent to each other. can be minimized.

Since the three inlets 30 described above are provided at the upper end of the outer peripheral surface of the body 21 of the secondary cyclone 20', the plurality of flow guides 70 are located higher than the lower end of the discharge pipe 25a to correspond thereto. provided, the air introduced into each of the three inlets 30 may be guided.

That is, when air is tangentially introduced into the interior of the secondary cyclone 20' through the plurality of inlets 30, the flow guide 70 allows the air introduced into each inlet 30 to pass through the outlet pipe 25a. It can be guided to move into the discharge pipe (25a) through the lower end of the. To this end, the flow guide 70 may be formed to extend toward the lower end of the discharge pipe (25a).

Each of the plurality of flow guides 70 may be provided between the inlets 30 adjacent to each other. The flow guide 70 may be provided at the center between the inlets 30 adjacent to each other.

The plurality of flow guides 70 may be formed in three to correspond to the three inlets 30 .

Each of the plurality of flow guides 70 may include a guide surface 71 , a blocking surface 72 , and a cover surface 73 . The guide surface 71 , the blocking surface 72 , and the cover surface 73 may be integrally formed.

The guide surface 71 may be provided to guide the air introduced into one inlet 30 . To this end, the guide surface 71 extends downward from one end to the other end, and may be formed to move away from the corresponding inlet 30 from one end to the other end. The flow guide 70 may guide the air to move to the lower end of the discharge pipe.

The guide surface 71 may be provided to face the opening 35 of the inlet duct of the secondary cyclone 20' so that the air introduced in the tangential direction of the secondary cyclone 20' can be guided more efficiently. have.

The guide surface 71 may have a spiral shape along the circumference of the discharge pipe 25a as shown in FIGS. 7 and 8 . Alternatively, the guide surface 71c may be provided to be inclined with respect to the tangential direction of the secondary cyclone 20 ′ as shown in FIG. 9 .

The blocking surface 72 may extend in a direction parallel to the extending direction of the discharge pipe 25a from one end to the other end. That is, the blocking surface 72 may be formed in a direction perpendicular to the tangential direction of the secondary cyclone 20 ′ from one end to the other end.

Here, the other end of the guide surface 71 and the other end of the blocking surface 72 may contact each other, and the cover surface 73 may cover between the guide surface 71 and the blocking surface 72 . The flow guide 70 may have a triangular shape as a whole.

More specifically, the plurality of flow guides 70 may include a first flow guide 70', a second flow guide 70'', and a third flow guide (not shown). The first flow guide 70' is disposed between the first inlet 30' and the second inlet 30'', and the second flow guide 70'' is disposed between the second inlet 30'' and the second inlet 30''. It may be disposed between the three inlets (not shown).

In this case, the air introduced into the first inlet 30 ′ may be guided along the guide surface 71 ′ of the first flow guide 70 ′ as shown in FIG. 7 . As the guide surface 71 ′ is formed in a spiral shape, air may flow spirally.

The air introduced into the second inlet 30'' is not moved in the direction toward the first inlet 30' by the blocking surface 72' of the first flow guide 70' as shown in FIG. and may be guided along the guide surface 71 ″ of the second flow guide 70 ″.

As such, each of the plurality of flow guides 70 can guide the air flowing in from the corresponding inlet 30, and the air flowing into the other inlet other than the corresponding inlet blocks the flow through the blocking surface 72, The air introduced into each inlet 30 can be effectively moved toward the lower end of the discharge pipe 25a along the corresponding respective flow guides 70, so that the air introduced from each inlet 30 is It is possible to prevent the flow loss from being lowered by mixing with each other.

Hereinafter, a vacuum cleaner having a multi-cyclone dust collector according to an embodiment of the present disclosure as described above 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.

10 is a view showing a wireless stick cleaner having a multi-cyclone dust collector according to an embodiment of the present disclosure, and FIG. 11 is a partial cross-sectional view showing the multi-cyclone dust collector installed in the wireless stick cleaner of FIG. 10 .

10 and 11 , 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 1 generating suction force, a handle 130 capable of gripping the wireless stick cleaner 100, a battery 140 supplying power to the suction motor 120, and an extension tube 160. It may include a connection part 150 that can be connected. At one side of the suction motor 120 , a mounting part 121 on which the base 50 of the multi-cyclone dust collector 1 is mounted is provided. Accordingly, the air from which dirt and dust is removed while passing through the multi-cyclone dust collector 1 passes through the suction motor 120 and is discharged to the outside of the wireless stick cleaner 100 .

The handle 130 is installed on the upper end of the wireless stick cleaner 100 and is formed so that the user can operate the wireless stick cleaner 100 by holding it by hand. A switch (not shown) capable of turning on/off the power of the wireless stick cleaner 100 may be provided on the handle 130 .

As the battery 140 , a rechargeable battery that can be charged using an external power source may be used. One end 151 of the connection part 150 is formed to be detachable from the extension pipe 160 , and the other end 152 is in communication with the inlet 11b of the primary cyclone separator 10 of the multi-cyclone dust collector 1 . is formed Between one end 151 and the other end 152 of the connection part 150, a connection passage 153 through which the air containing dirt sucked from the outside passes is provided. Accordingly, 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 pipe 160 is formed to be connected to the connection part 150 of the main body 110, and the other end may be provided with a suction nozzle 170 that moves along the surface to be cleaned and sucks dirt on the surface to be cleaned.

When the power of the wireless stick cleaner 100 is turned on, the suction motor 120 rotates to generate suction force. When the suction force is generated, the 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 dirt-containing air introduced into the extension pipe 160 is introduced into the inlet 11b of the multi-cyclone dust collector 1 through the connection part 150 of the main body 110 .

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

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

While the air introduced through the plurality of inlets 30 rotates inside the secondary cyclone 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 collection chamber 40 through the dust outlet.

The clean air from which fine dust is separated is discharged to the base 50 through the plurality of outlets 25 of the secondary cyclone 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 .

The scope of the present invention is not limited to the specific embodiments described above. Various other embodiments that can be modified or modified by those of ordinary skill in the art within the scope that do not deviate from the gist of the present invention specified in the claims will also fall within the scope of the present invention.

Claims

a primary cyclone separator provided to first separate dirt from the incoming dirt-containing air; and

a secondary cyclone separator installed inside the primary cyclone separator and provided to separate dust from the air discharged from the primary cyclone separator;

The secondary cyclone separator,

a secondary cyclone each provided with at least two inlets for introducing air and an outlet for discharging the introduced air; and

A cover for covering the upper end of the secondary cyclone, and an upper cover including a discharge pipe inserted into the discharge port to discharge the air;

The upper cover is

A plurality of flow guides disposed between adjacent inlets to minimize air flow interference between adjacent inlets, the plurality of flow guides provided to correspond to the at least two inlets on the outer surface of the discharge pipe; Multi-cyclone dust collecting further comprising Device.
According to claim 1,

The at least two inlets are provided at the upper end of the outer peripheral surface of the body so as to protrude outward from the body of the secondary cyclone,

The plurality of flow guides is a multi-cyclone dust collector provided at a position higher than the lower end of the discharge pipe to correspond to the at least two inlets.
3. The method of claim 2,

Each of the plurality of flow guides,

and a guide surface extending toward the lower end of the discharge pipe and guiding the air introduced into each of the at least two inlets to move to the lower end of the discharge pipe.
According to claim 1,

The at least two inlets are formed in a tangential direction to the outer peripheral surface of each of the secondary cyclones,

One of the plurality of flow guides is a multi-cyclone dust collector comprising a guide surface provided to guide the air introduced into one of the at least two inlets.
5. The method of claim 4,

Each of the at least two inlets includes an opening formed in each body of the secondary cyclone, and an inlet duct formed to surround the opening so that air can be introduced in a tangential direction with respect to the outer circumferential surface of the body,

The guide surface is a multi-cyclone dust collector provided to face the opening of the corresponding inlet.
6. The method of claim 5,

The guide surface is

A multi-cyclone dust collector that extends downward from one end to the other end, and is formed to be farther from the corresponding inlet from the one end to the other end.
7. The method of claim 6,

The guide surface is a multi-cyclone dust collector having a spiral shape along the circumference of the discharge pipe.
7. The method of claim 6,

The guide surface is a multi-cyclone dust collector provided to form an inclination with respect to the tangential direction.
7. The method of claim 6,

The one flow guide,

A multi-cyclone dust collector including a blocking surface provided on a side opposite to the guide surface facing the one inlet so as to block the air introduced from the one inlet and the adjacent inlet from moving toward the one inlet. .
10. The method of claim 9,

The blocking surface is a multi-cyclone dust collector extending in a direction parallel to the extension direction of the discharge pipe from one end to the other end.
11. The method of claim 10,

The other end of the guide surface and the other end of the blocking surface are in contact with each other multi-cyclone dust collector.
12. The method of claim 11,

The flow guide is

Further comprising a cover surface covering between the guide surface and the blocking surface,

The guide surface, the blocking surface, and the cover surface are integrally formed in a multi-cyclone dust collector.
According to claim 1,

The secondary cyclones are provided in plurality,

The upper cover is provided to cover the upper portions of the plurality of secondary cyclones, and a multi-cyclone dust collector including a plurality of discharge pipes corresponding to the plurality of secondary cyclones.
14. The method of claim 13,

The plurality of secondary cyclones,

A central cyclone provided to correspond to the center of the upper cover, and eight peripheral cyclones provided to correspond to the circumference of the upper cover,

The first cyclone has four inlets, and each of the second cyclones has three inlets.
suction nozzle;

a multi-cyclone dust collector connected to the suction nozzle; and

Including; a suction motor connected to the multi-cyclone dust collector and generating a suction force;

The multi-cyclone dust collector,

a primary cyclone separator provided to first separate dirt from the incoming dirt-containing air; and

a secondary cyclone separator installed inside the primary cyclone separator and provided to separate dust from the air discharged from the primary cyclone separator;

The secondary cyclone separator,

a secondary cyclone each provided with at least two inlets for introducing air and an outlet for discharging the introduced air; and

A cover for covering the upper end of the secondary cyclone, and an upper cover including a discharge pipe inserted into the discharge port to discharge the air;

The upper cover is

The vacuum cleaner further comprising: a plurality of flow guides disposed between the inlets adjacent to each other to minimize interference of air flow between the inlets adjacent to each other, and provided to correspond to the at least two inlets on the outer surface of the discharge pipe.