Dust collecting device and cleaner provided with same

Abstract

Disclosed are a dust collecting device and a cleaner provided with same. The dust collecting device includes an upper fluid channel housing. The dust collecting device includes a plurality of cyclones. The plurality of cyclones may include a first cyclone and a plurality of second cyclones arranged inside the first cyclone. The plurality of second cyclones are arranged in a plurality of rows along the radial direction of the first cyclone. The dust collecting device includes the upper fluid channel housing. The upper fluid channel housing includes a fluid channel base part and a flow guide part. The fluid channel base part is disposed above the plurality of cyclones. The flow guide part may be formed to protrude upward from the fluid channel base part. The flow guide part may evenly distribute air to the plurality of rows of the second cyclones.

Description

Dust collector and vacuum cleaner equipped with same

[0001] The present invention relates to a dust collecting device capable of improving the performance of a cyclone positioned far from a suction port and a vacuum cleaner equipped with the same.

[0002] A vacuum cleaner is a device that performs cleaning work by sucking up dust or foreign substances in the area to be cleaned or wiping them away.

[0003] Vacuum cleaners are widely used because they can improve cleaning effectiveness and user convenience compared to brooms or mops.

[0004] Vacuum cleaners can be used indoors or outdoors. However, due to issues such as power supply and hygiene, vacuum cleaners are typically used indoors rather than outdoors.

[0005] Vacuum cleaners can be divided into manual vacuum cleaners and automatic robot vacuum cleaners.

[0006] Manual vacuum cleaners require the user to move the vacuum cleaner to perform the cleaning task. Manual vacuum cleaners can be categorized by type, including canister vacuum cleaners, upright vacuum cleaners, handheld vacuum cleaners, and stick vacuum cleaners.

[0007] An autonomous vacuum cleaner drives itself to perform its cleaning tasks. An example of an autonomous vacuum cleaner is a robot vacuum cleaner.

[0008] Handheld vacuum cleaners include a cyclone, which uses centrifugal force to separate debris and dust from the airflow.

[0009] The more cyclones there are, the higher the separation performance of the vacuum cleaner.

[0010] To ensure air flow between multiple cyclones, separate channels may be formed around the cyclones.

[0011] However, the above separate euro has a problem that makes it difficult to place the cyclone.

[0012] In addition, the above separate euro has the problem that it is difficult to secure additional numbers of cyclones.

[0013] This causes the number of cyclones to be limited, which reduces the separation performance of the cleaner.

[0014] In particular, when an air intake port is formed on one side of a cylindrical housing and a plurality of cyclones are arranged in a plurality of rows in the radial direction inside the housing, the cyclones arranged close to the air intake port can exhibit their original separation performance because they have a sufficient amount of air intake.

[0015] However, the flow supply is significantly reduced in the cyclone located radially inward and far from the suction port because the flow is blocked by the cyclone located radially outward.

[0016] Due to this, the separation performance of the cyclone becomes uneven, which has a serious negative impact on the separation performance of the vacuum cleaner.

[0017] The purpose of the present invention is to provide a dust collecting device having a structure capable of solving the above-described problems and a vacuum cleaner equipped with the same.

[0018] The first purpose is to provide a dust collector having a structure capable of improving separation performance and a vacuum cleaner equipped with the same.

[0019] The second purpose is to provide a dust collecting device having a structure capable of securing an additional number of cyclones and a vacuum cleaner equipped with the same.

[0020] The third purpose is to provide a dust collecting device having a structure that can ensure smooth flow supply to an inner cyclone positioned far from the suction port in a plurality of rows of cyclones arranged radially, and a vacuum cleaner equipped with the same.

[0021] The fourth purpose is to provide a dust collecting device having a structure that allows the flow discharged from the outlet of a cyclone to be uniformly distributed, and a vacuum cleaner equipped with the same.

[0022] As a result of intensive research, the inventors of the present invention have found that the first to third objectives of the present invention can be achieved by the following embodiments of the present invention.

[0023] In order to achieve the above-described object, a dust collecting device according to an embodiment of the present invention may include at least one of a housing, a suction channel housing, a first cyclone, a plurality of second cyclones, and an upper channel housing. The suction channel housing may be coupled to the interior of the housing. An intake port may be formed on one side of an outer circumferential surface of the suction channel housing. The first cyclone may be disposed inside the housing. The first cyclone may separate dust from air sucked through the intake port. The plurality of second cyclones may be disposed inside the first cyclone. The plurality of second cyclones may separate fine dust from air passing through the first cyclone. The upper channel housing may be provided inside the suction channel housing. The upper channel housing may be disposed above the first cyclone and the second cyclone. The above plurality of second cyclones can be arranged in multiple rows along the radial direction of the first cyclone.

[0024] The upper flow housing may include a flow base portion and a flow guide portion. The flow base portion may be mounted on the upper end of the plurality of second cyclones. The flow base portion may be provided with a plurality of discharge holes to discharge air that has passed through the plurality of second cyclones.

[0025] The above flow guide portion may be formed to protrude from the flow base portion in a direction opposite to the second cyclone. The flow guide portion may have a flow path that opens toward the second cyclone and extends along the radial direction. The flow guide portion may move the air that has passed through the first cyclone along the flow path and distribute it to each of the plurality of rows of second cyclones.

[0026] Through this, the flow guide unit can evenly distribute air to a plurality of second cyclones.

[0027] According to one embodiment, the second cyclones of the plurality of rows are arranged in the first to Mth rows from the inner side in the radial direction, and can be divided into N groups by dividing them into N equal parts along the circumferential direction of the first cyclone.

[0028] The above flow guide unit may include a plurality of first flow guide units and a second flow guide unit. The plurality of first flow guide units may be arranged between two groups of second cyclones adjacent in the circumferential direction. The plurality of first flow guide units may extend along the radial direction. The second flow guide unit may be connected to be in communication with the inner end of the plurality of first flow guide units. The second flow guide unit may extend in the circumferential direction to surround the second cyclone of the first row among the plurality of rows of second cyclones.

[0029] Through this, the plurality of first flow guide sections can evenly supply air to the plurality of rows of second cyclones divided into N groups.

[0030] According to one embodiment, the first flow guide portion may include a first side wall, a second side wall, and a first connecting wall.

[0031] The first side wall may extend in the radial direction. The first side wall may be configured to surround one side of a second cyclone of one of the two groups adjacent to each other in the circumferential direction.

[0032] The second side wall may be spaced apart from the first side wall in the circumferential direction and may extend in the radial direction. The second side wall may be configured to surround one side of the second cyclone of the other group among the two groups.

[0033] The above first connecting wall can connect one end of the first side wall and one end of the second side wall in the protruding direction of the flow guide part.

[0034] Through this, the first flow guide unit can smoothly supply uniform flow to each of the second cyclones of the multiple rows of each divided group.

[0035] In one embodiment, the first side wall may include a first straight portion and a first curved portion. The first straight portion may extend toward one side of the second cyclone of one of the two groups. The first curved portion may be formed in a curved shape having the same curvature as the first outer circumference so as to surround the first outer circumference of one of the second cyclones of the one group at the inner end of the first straight portion.

[0036] The second side wall may include a second straight portion and a second curved portion. The second straight portion may extend toward one side of the second cyclone of the other group among the two groups. The second curved portion may be formed in a curved shape having the same curvature as the second outer circumference so as to surround the second outer circumference of one of the second cyclones of the other group at the inner end of the second straight portion.

[0037] Through this, the first side wall and the second side wall can minimize flow interference between the divided groups.

[0038] According to one embodiment, the second flow guide portion may include a second outer flow guide portion and a second inner flow guide portion.

[0039] The second outer flow guide part can connect the first side wall of one of the two first flow guide parts adjacent in the circumferential direction and the second side wall of the other of the two first flow guide parts.

[0040] The second inner flow guide portion may be spaced apart from the second outer flow guide portion in the radial direction by a gap. The second inner flow guide portion may extend circumferentially to surround the second cyclone of the first row.

[0041] Through this, the second flow guide unit can also supply air flow to the second cyclone of the first row, which is far away from the intake port among the second cyclones of the multiple rows.

[0042] According to one embodiment, the second outer flow guide portion may include a plurality of first circular arc portions and a plurality of first extension portions. The plurality of first circular arc portions may be formed in an arc shape to surround the outer circumferential surface of the second cyclone of the first row. The plurality of first circular arc portions may be arranged to be spaced apart from each other in the circumferential direction. The first extension portion may connect two first circular arc portions that are adjacent in the circumferential direction.

[0043] The second inner flow guide portion may include a second circular arc portion and the second extension portion. The second circular arc portion may be formed in an arc shape to surround the outer circumference of the second cyclone of the second row, which is radially adjacent to the second cyclone of the first row. The second circular arc portion may be connected to the inner end of the second side wall. The second extension portion may connect the second circular arc portion and the first side wall.

[0044] Through this, the second outer flow guide part and the second inner flow guide part can supply air to the second cyclone of multiple rows divided into N groups while minimizing flow interference.

[0045] According to one embodiment, the upper flow path housing may extend in the opposite direction from the first cyclone from the outer periphery of the flow path base portion. A flow path extension portion may be further provided on the inside of the upper flow path housing to extend the flow path length of air discharged through the discharge hole.

[0046] Through this, the above-described euro extension part can have the air suction power of the fan motor, which will be described later, equally applied to multiple second cyclones.

[0047] In one embodiment, the first cyclone may include a mesh net, an outer case, and an inner case. The mesh net may be in communication with the suction port. The mesh net may be formed in a cylindrical shape to surround the plurality of second cyclones. The mesh net may separate dust from the air. The outer case may be coupled to one side of the mesh net. The inner case may be arranged inside the outer case.

[0048] Through this, the first cyclone can primarily separate dust in the air through a mesh net and centrifugal force.

[0049] According to one embodiment, a mounting guide may be formed to protrude from the outer surface of the upper euro housing to surround the other side of the mesh net.

[0050] Through this, the mounting guide can support the mesh network more stably.

[0051] In one embodiment, the second cyclone may include at least one of a casing, an inlet, a fine dust outlet, a vortex finder, and a plurality of guide vanes.

[0052] The casing may be arranged inside the mesh net. The casing may be formed in a cylindrical shape with a diameter smaller than the mesh net. The casing may extend in the longitudinal direction of the mesh net. The inlet may be formed at one end of the casing to allow air passing through the mesh net to flow in. The fine dust discharge port may be formed at the other end of the casing. The fine dust discharge port may discharge fine dust separated from the air of the casing. The vortex finder may be arranged inside the casing. The vortex finder may protrude from one end of the casing toward the discharge hole and may be coupled to be in communication with the discharge hole. The vortex finder may discharge air from which the fine dust has been separated. The plurality of guide vanes may protrude radially between the inner peripheral surface of the casing and the outer peripheral surface of the vortex finder. The plurality of guide vanes may be formed to be inclined so as to induce the flow of air introduced through the inlet into a rotational motion.

[0053] Through this, the second cyclone can separate fine dust from the air that passed through the first cyclone.

[0054] According to one embodiment, the flow guide portion may be opened to face the inlet in the longitudinal direction of the casing. The flow guide portion may transmit air flowing along the flow path to the inlet.

[0055] According to one embodiment, the flow path base portion may include a first surface and a second surface. The first surface may be arranged toward the second cyclone. The second surface may include a second surface arranged in an opposite direction to the first surface. The thickness of the flow path base portion may be formed between the first surface and the second surface.

[0056] The above-mentioned euro base portion may include a discharge port coupling portion. The discharge port coupling portion may be coupled to one end of the vortex finder so as to be in communication with it. The discharge port coupling portion may be formed to be recessed from the second surface toward the first surface along the perimeter of the discharge hole.

[0057] Through this, the discharge port joint can maintain a seal between the euro base portion and the vortex finder.

[0058] According to one embodiment, the upper flow path housing may further include a flow interference prevention portion. The flow interference prevention portion may be formed to protrude from the center of the flow path base portion into the space between the second cyclones of the first row. The flow interference prevention portion may include a plurality of curved portions having a curvature corresponding to the outer circumferential surface of the second cyclones of the first row. Through this, the flow interference prevention portion may prevent flow interference of air moving in the radial direction along the flow guide portion.

[0059] According to one embodiment, the dust collector may further include a filter unit. The filter unit may be provided within the suction flow housing. The filter unit may be positioned downstream of the upper flow housing with respect to the air flow direction. Through this, the filter unit may separate fine dust from the air discharged from the second cyclone.

[0060] The above filter unit may include a pre-filter and a HEPA filter. The HEPA filter may be formed to surround the pre-filter.

[0061] According to one embodiment, the suction channel housing may include an inner wall portion, a partition wall, and a suction channel guide. The inner wall portion may be provided inside the suction channel housing. The partition wall may extend radially from an inner circumferential surface of the suction channel housing toward an outer circumferential surface of the inner wall portion. The partition wall may define a first annular space formed between the suction channel housing and the filter portion, and a second annular space between the suction channel housing and the inner wall portion. The suction channel guide may be formed to be inclined from the upper channel housing toward the first cyclone along the second annular space. The suction channel guide may guide the flow of air sucked through the suction port to rotate. The upper channel housing may be coupled to the inner wall portion.

[0062] Through this, the upper duct housing can be supported by the inner wall of the suction duct housing.

[0063] According to one embodiment, the upper flow housing may include a plurality of casing coupling portions. The plurality of casing coupling portions may have hook coupling holes. The plurality of casing coupling portions may be formed to protrude from the flow base portion toward the outer circumference of the casing. A fastening hook may be formed to protrude from the outer circumference of the casing. The fastening hook may be inserted and coupled into the hook coupling hole.

[0064] Through this, the second cyclone can be supported by being coupled to the upper euro housing by the fastening hook.

[0065] In one embodiment, the number of the second cyclones may be 30 in total. The plurality of rows of second cyclones may be composed of second cyclones in rows 1 through 3. The plurality of rows of second cyclones may be divided into six equal parts, thus forming six groups. The plurality of second cyclones may be arranged so as to be external to each other.

[0066] Through this, the number of second cyclones can be arranged densely to improve the separation performance of the cleaner.

[0067] A vacuum cleaner according to one embodiment of the present invention may include a suction unit, a dust collector, and a fan motor. The suction unit may draw air from a cleaning target area. The dust collector may separate dust from the air drawn through the suction unit. The dust collector may be positioned downstream of the dust collector based on the air flow direction. The fan motor may draw the air into the dust collector.

[0068] The dust collector may include at least one of a housing, a first cyclone, a plurality of second cyclones, and an upper flow path housing. The housing may extend in one direction. The first cyclone may be disposed inside the housing. The first cyclone may separate dust from air sucked through the suction unit. The plurality of second cyclones may be disposed inside the first cyclone. The plurality of second cyclones may separate fine dust from air passing through the first cyclone. The upper flow path housing may be provided inside the housing. The upper flow path housing may be disposed above the first cyclone and the second cyclone.

[0069] The above plurality of second cyclones can be arranged in multiple rows along the radial direction of the first cyclone.

[0070] The upper flow housing may include a flow base portion and a flow guide portion. The flow base portion may be mounted on the upper end of the plurality of second cyclones. The flow base portion may have a plurality of discharge holes through which air passing through the plurality of second cyclones is discharged. The flow guide portion may be formed to protrude from the flow base portion in a direction opposite to the second cyclones. The flow guide portion may have a flow path that opens toward the second cyclones and extends along the radial direction. The flow guide portion may move the air passing through the first cyclones along the flow path and distribute the air to each of the plurality of rows of second cyclones.

[0071] Through this, the upper cyclones can evenly supply air not only to the second cyclone in the outermost row arranged close to the suction portion, but also to the second cyclone in the innermost row arranged far from the suction portion.

[0072] According to one embodiment, the fan motor may include an impeller, a rotational shaft, and a drive motor. The impeller may form an air flow. The rotational shaft may have one end to which the impeller is coupled. The drive motor may include a rotor and a stator. The rotor may be coupled to the rotational shaft. The stator may be configured to surround the rotor. The drive motor may provide rotational force to the impeller through the rotational shaft.

[0073] The second cyclone may be extended in one direction. The axial direction of the rotational axis and the longitudinal direction of the second cyclone may be arranged perpendicular to each other.

[0074] According to one embodiment, the dust collector may include a filter unit. The filter unit may be positioned between the downstream side of the upper flow housing and the upstream side of the fan motor based on the direction of air flow.

[0075] The upper flow path housing may extend in one direction from the flow path base portion toward the filter portion. The upper flow path housing may have a flow path extension portion therein. The flow path extension portion may extend the flow path of air discharged through the discharge hole to a preset length.

[0076] Through this, the flow extension part can equally apply the suction force of the fan motor that sucks air to the plurality of second cyclones, even if the flow direction of the air discharged through the discharge hole of the upper flow housing and the flow direction of the air generated by the fan motor are perpendicular to each other.

[0077] According to one embodiment, the vacuum cleaner may include at least one of a fan motor receiving portion, a battery, a battery receiving portion, and a handle portion. The fan motor receiving portion may extend from one side of the housing in a direction opposite to the suction portion in a vertical direction in the one direction. The battery may supply power to the fan motor. The battery receiving portion may extend from the other side of the housing in a direction opposite to the suction portion in a vertical direction in the one direction. The handle portion may be formed to be inclined at a preset angle with respect to the one direction between the fan motor receiving portion and the battery receiving portion. The handle portion may be connected to the fan motor receiving portion and the battery receiving portion.

[0078] Through this, the handle part can be easily gripped by the user, providing convenience in cleaning work.

[0079] According to an embodiment of the present invention, the following effects can be achieved.

[0080] First, a plurality of second cyclones may be arranged in multiple rows in the radial direction inside the first cyclone. The second cyclones in the multiple rows may be arranged in the circumferential direction or in the direction of a line segment of a polygon.

[0081] Through this, multiple secondary cyclones are densely arranged inside the first cyclone, which not only increases the number of secondary cyclones but also improves the separation performance of the cleaner.

[0082] Second, an upper flow housing is mounted on the upper portion of the second cyclone. The upper flow housing may include a flow base portion and a flow guide portion. The flow base portion has multiple discharge holes.

[0083] A plurality of discharge holes are formed to communicate with the discharge port of the vortex finder of the second cyclone. The plurality of second cyclones can be evenly divided into N groups along the circumferential direction. Here, N is a natural number greater than or equal to 2. In the present embodiment, N is 6.

[0084] The flow guide portion is formed to protrude upward from the euro base portion. The flow guide portion includes a plurality of first flow guide portions and second flow guide portions.

[0085] The first flow guide section extends in the radial direction of the euro base section. A plurality of first flow guide sections are provided in N numbers, and can be arranged at equal intervals between two adjacent groups of second cyclones along the circumferential direction.

[0086] The first flow guide section forms the first flow path. A flow path inlet is formed at the outer end of the first flow guide section. The flow path inlet is a passage that introduces air that has passed through the mesh of the first cyclone.

[0087] The second flow guide portion extends circumferentially in a closed loop shape. A second flow path is formed within the second flow guide portion. The second flow guide portion is configured to connect the inner ends of a plurality of first flow guide portions so as to be communicably connected.

[0088] For example, a total of 30 second cyclones may include second cyclones in rows 1 through 3 from the radially inner to the outer. The 30 second cyclones may be divided into 6 groups, and each group may include 5 second cyclones. Each group may include a total of 5 second cyclones, including one in the first row, two in the second row, and two in the third row.

[0089] For each group, two second cyclones in the second row and two second cyclones in the third row can be divided between two first flow guide sections adjacent to each other in the circumferential direction. One second cyclone in the first row can be divided inside the second flow guide section.

[0090] According to this configuration, air passing through the mesh of the first cyclone flows into the first flow path of the first flow guide section through the flow path inlet. The first flow path is positioned higher than the vortex finder of the second cyclone, so that the air of the first flow path can move from the outermost side to the innermost side of the first flow guide section in the radial direction without flow interference with the vortex finder of the second cyclone of the third row.

[0091] Additionally, a second flow guide part communicating with the inner end of the first flow guide part is arranged to surround the second cyclone of the first row. The second flow guide part can directly receive air from the first flow guide part and evenly distribute it to the inlets of the six second cyclones of the first row.

[0092] The first flow guide portion may be formed in a curved shape to cross between two discharge holes adjacent in a circumferential or radial direction, and one side of the first side wall of the first flow guide portion may surround one of the two discharge holes, and one side of the second side wall of the first flow guide portion may surround the other of the two discharge holes.

[0093] The second flow guide section may be formed in a curved shape to cross between two discharge holes adjacent in a circumferential or radial direction, and one side of the first circular portion of the second flow guide section may surround one of the two discharge holes, and one side of the second circular portion of the second flow guide section may surround the discharge holes of the first row.

[0094] Through this, the first flow guide unit is positioned closest to the inlet of the second cyclone of each group divided into N groups, so that not only can the air flow be evenly distributed to each group, but also can be evenly distributed to multiple second cyclones within each group.

[0095] Therefore, in the second cyclones of the multiple rows, the flow guide part can evenly distribute the air flow not only to the second cyclones of the third row arranged close to the flow inlet, but also to the second cyclones of the first row arranged far from the flow inlet.

[0096] Third, the flow guide part can be formed on the upper part of the cyclone without providing a separate flow path space between the cyclones arranged externally.

[0097] In addition, the first flow guide unit can supply smooth flow to the second cyclones of each group without flow interference between the plurality of second cyclones divided into N groups.

[0098] In addition, the fluid guide section can improve the separation performance of the cleaner by supplying uniform fluid to each group.

[0099] Fifth, a pre-filter and HEPA filter can be placed on the upper portion of the upper filtration housing. By stagnating the air flow, the pre-filter and HEPA filter can supply an even air flow to each cyclone.

[0100] In addition, the upper flow housing can be extended upward from the flow base. A flow extension can be formed inside the upper flow housing. The flow extension can extend the flow path of air discharged from the second cyclone.

[0101] Through this, the euro extension unit can equally apply the air suction force to the plurality of second cyclones regardless of the distance (or position) between the fan motor and the plurality of second cyclones that are axially spaced apart.

[0102] FIG. 1 is a perspective view showing a vacuum cleaner according to one embodiment of the present invention.

[0103] Figure 2 is a plan view of the vacuum cleaner of Figure 1 viewed from above.

[0104] Fig. 3 is an exploded view showing the suction unit, the first cover, and the second cover disassembled to explain the suction path housing of the vacuum cleaner in Fig. 1.

[0105] Fig. 4a is a front view taken along IVA-IVA in Fig. 1.

[0106] Fig. 4b is a cross-sectional view taken along IVB-IVB in Fig. 4a, and is a conceptual diagram showing the air movement path.

[0107] Fig. 5 is a cross-sectional view taken along line VV in Fig. 2, and is a conceptual diagram showing the internal components of the vacuum cleaner.

[0108] Figure 6 is an enlarged view of VI in Figure 5, and is a conceptual diagram for explaining the configuration of a fan motor.

[0109] Figure 7 is a conceptual diagram showing the path of air passing through the suction unit, the cyclone of the dust collector, and the filter unit in Figure 6.

[0110] Figure 8 is a conceptual diagram showing an upper urea housing mounted on the upper part of the cyclone in Figure 7.

[0111] Figure 9 is a conceptual diagram showing the mesh network removed from Figure 8.

[0112] Fig. 10 is a cross-sectional view taken along XX in Fig. 8, and is a conceptual diagram showing the combination of the upper urea housing and the cyclone.

[0113] Fig. 11 is a conceptual diagram showing an enlarged view of XI in Fig. 10, showing dust being removed in the second cyclone.

[0114] Figure 12 is a conceptual diagram showing the three-dimensional relationship between the upper euro housing and the cyclone in Figure 10.

[0115] Figure 13 is a conceptual diagram showing air flowing into the second cyclone by enlarging XIII in Figure 12.

[0116] Fig. 14 is a conceptual diagram showing a plan view of the upper euro housing and cyclone in Fig. 8 as seen from above, cut along line XIV-XIV.

[0117] Fig. 15 is a perspective view showing the upper euro housing and part of the cyclone cut along line XIV-XIV in Fig. 14.

[0118] Fig. 16 is a conceptual diagram showing the second cyclone with the upper urea housing removed in Fig. 9.

[0119] Figure 17 is a conceptual diagram showing the second cyclones arranged in multiple rows in Figure 16.

[0120] Fig. 18 is a perspective view showing the upper euro housing in Fig. 8.

[0121] Fig. 19 is a perspective view showing the upper euro housing in Fig. 18 as viewed from the bottom.

[0122] Figure 20 is a plan view showing the upper euro housing as seen from above in Figure 18.

[0123] Fig. 21 is a cross-sectional view taken along XXI-XXI in Fig. 20.

[0124] Fig. 22 is a cross-sectional view taken along XXII-XXII in Fig. 20.

[0125] Figure 23a is a front view taken along XXIIIA-XXIIIA in Figure 2.

[0126] Fig. 23b is a cross-sectional view taken along XXIIIB-XIIIB in Fig. 23a, and is a conceptual diagram showing the path along which air moves through the flow guide portion of the upper flow housing.

[0127] Fig. 23c is a cross-sectional view taken along XXIIIC-XXIIIC in Fig. 23a, and is a plan view showing air flowing into the second cyclone with the flow guide part removed from the upper flow path housing of Fig. 23b.

[0128] Hereinafter, a dust collecting device and a vacuum cleaner equipped with the same according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

[0129] In the following description, descriptions of some components may be omitted to clarify the features of the present invention.

[0130] 1. Definition of Terms

[0131] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0132] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0133] As used herein, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0134] In this specification, foreign substances contained in the air can be categorized into dust, fine dust, and ultrafine dust. Relatively large particles are referred to as "dust," relatively small particles are referred to as "fine dust," and particles smaller than "fine dust" are referred to as "ultrafine dust."

[0135] “Axial” as used in the following description means the longitudinal direction of the axis of rotation.

[0136] As used in the following description, “radial direction” means the longitudinal direction of a line segment from the center of a circle or cylinder to a point on the circumference (circumference).

[0137] As used in the following description, “circumferential” means the direction of the circumference of a circle.

[0138] The terms “front side,” “rear side,” “left side,” “right side,” “upper side,” and “lower side” used in the following description will be understood with reference to the coordinate system illustrated in FIG. 1.

[0139] 2. Description of the configuration of a vacuum cleaner according to one embodiment of the present invention

[0140] Hereinafter, each component of a vacuum cleaner according to an embodiment of the present invention will be described with reference to the attached drawings.

[0141] FIG. 1 is a perspective view showing a vacuum cleaner according to one embodiment of the present invention.

[0142] Figure 2 is a plan view of the vacuum cleaner of Figure 1 viewed from above.

[0143] Figure 3 is an exploded view showing the suction part (115), the first cover (113), and the second cover (114) disassembled to explain the suction path housing (153) of the vacuum cleaner in Figure 1.

[0144] Fig. 4a is a front view taken along IVA-IVA in Fig. 1.

[0145] Fig. 4b is a cross-sectional view taken along IVB-IVB in Fig. 4a, and is a conceptual diagram showing the air movement path.

[0146] Fig. 5 is a cross-sectional view taken along line VV in Fig. 2, and is a conceptual diagram showing the internal components of the vacuum cleaner.

[0147] Figure 6 is an enlarged view of VI in Figure 5, and is a conceptual diagram for explaining the configuration of the fan motor (130).

[0148] The vacuum cleaner of the present invention can be applied to a handheld vacuum cleaner.

[0149] A vacuum cleaner according to the present invention includes a suction unit (115), a fan motor (130), a dust collector (100), a handle unit (152), and a battery (150). Hereinafter, the subcomponents of the vacuum cleaner will be described, but the dust collector (100) will be described separately.

[0150] (1) Components of a vacuum cleaner

[0151] The suction unit (115) may be connected to communicate with a suction nozzle (not shown). The suction nozzle may be configured to move along the area to be cleaned. The suction nozzle is configured to suck up foreign substances such as dust from the area to be cleaned.

[0152] A connecting pipe (not shown) may be positioned between the suction nozzle and the suction portion (115). The connecting pipe may be formed in a cylindrical shape. One end of the connecting pipe may be connected in communication with the outlet of the suction nozzle. The other end of the connecting pipe may be connected in communication with the suction portion (115).

[0153] Through this, the connecting pipe can connect the suction nozzle and the suction part (115) so that they can communicate with each other. The connecting pipe can transfer air containing foreign substances such as dust from the suction nozzle to the suction part (115).

[0154] The suction part (115) may be configured to include a suction pipe (116), a suction pipe coupling part (117), and a check valve (118).

[0155] The suction pipe (116) may be formed in a cylindrical shape. The suction pipe (116) may be connected to the other end of the connecting pipe. Through this, the suction pipe (116) may suck in air transmitted through the connecting pipe.

[0156] The suction pipe coupling part (117) is configured to connect the suction pipe (116) and the housing (110) of the dust collector (100) to be described later. The suction pipe coupling part (117) may be formed in a shape such as a roughly cone or a polygonal pyramid. However, the shape of the suction pipe coupling part (117) is not limited thereto and may be formed in various shapes.

[0157] One end of the suction pipe coupling portion (117) can be coupled to one end of the suction pipe (116) so as to surround one end of the suction pipe (116). The other end of the suction pipe coupling portion (117) can be connected to one side of the housing (110) of the dust collector (100).

[0158] The cross-sectional area of ​​the suction pipe joint (117) can be formed so that the cross-sectional area gradually increases from one end of the suction pipe (116) to the housing (110).

[0159] The check valve (118) can be rotatably mounted on the downstream end of the suction pipe (116) based on the direction of air flow. The check valve (118) is configured to limit the air flow in one direction.

[0160] For example, the check valve (118) may be formed in a square plate shape. One side of the check valve (118) may be hingedly connected to the inside of the suction pipe (116). The other side of the check valve (118) may be rotated around the hinge. Through this, the check valve (118) may be rotated by a pressure difference to open and close the flow path of the suction pipe (116).

[0161] The pressure difference refers to the pressure difference between the upstream and downstream sides of the check valve (118) based on the air flow direction. The pressure difference may be generated by the air suction force of the fan motor (130), which will be described later. For example, the air suction force of the fan motor (130) refers to the force that sucks air from the upstream side to the downstream side of the check valve (118).

[0162] The check valve (118) can be rotated between an open position and a closed position. The closed position of the check valve (118) means a position in which the check valve (118) is arranged parallel to a center line radially passing through the center of the suction pipe (116) to close the flow path of the suction pipe (116). The open position of the check valve (118) means a position in which the check valve (118) is rotated at a preset angle from the suction portion (115) toward the first housing (111) about the hinge to open.

[0163] The rotation angle of the check valve (118) between the open position and the closed position may be limited to a range of acute angles. For example, the rotation angle of the check valve (118) may be limited to a range of 45 to 80 degrees from the closed position to the open position.

[0164] The check valve (118) may be configured to be rotated to the closed position by an elastic member such as a torsional spring.

[0165] For example, when the fan motor (130) is not operating, suction force is not generated and the check valve (118) is in the closed position, but when the fan motor (130) is operating, suction force is generated and the check valve (118) can rotate to the open position.

[0166] A valve seat portion may be provided at the downstream end of the suction pipe (116) so that the check valve (118) stops in the closed position. When the check valve (118) is in the closed position, the valve seat portion may be formed in a stepwise manner along the circumference of the check valve (118) at the downstream end of the suction pipe (116).

[0167] The valve seat portion may be formed to correspond to the shape of the check valve (118). When the check valve (118) is in the closed position, the valve seat portion may be arranged to face the check valve (118) in the longitudinal direction of the suction pipe (116). Through this, the check valve (118) can be stopped in the closed position by the valve seat portion, thereby blocking the backflow of air.

[0168] (2) Components of dust collector (100)

[0169] Figure 7 is a conceptual diagram showing the path of air passing through the suction unit (115), the cyclone (160, 170) of the dust collector (100), and the filter unit (120) in Figure 6.

[0170] Figure 8 is a conceptual diagram showing an upper flow housing (180) mounted on the upper portion of a cyclone (160, 170) in Figure 7.

[0171] Figure 9 is a conceptual diagram showing the appearance of the mesh network (161) removed from Figure 8.

[0172] Fig. 10 is a cross-sectional view taken along XX in Fig. 8, and is a conceptual diagram showing the combination of the upper euro housing (180) and the cyclone (160, 170).

[0173] Fig. 11 is an enlarged view of XI in Fig. 10, and is a conceptual diagram showing how dust is removed in the second cyclone (170).

[0174] Figure 12 is a conceptual diagram showing the three-dimensional relationship between the upper euro housing (180) and the cyclone (160, 170) in Figure 10.

[0175] Figure 13 is a conceptual diagram showing air flowing into the second cyclone (170) by enlarging XIII in Figure 12.

[0176] Fig. 14 is a plan view of the upper euro housing (180) and the cyclone (160, 170) in Fig. 8 as seen from above, and is a conceptual diagram showing the cut along line XIV-XIV.

[0177] Fig. 15 is a perspective view showing a portion of the upper euro housing (180) and the cyclone (160, 170) cut along line XIV-XIV in Fig. 14.

[0178] Figure 16 is a conceptual diagram showing the second cyclone (170) from which the upper euro housing (180) of Figure 9 has been removed.

[0179] Figure 17 is a conceptual diagram showing the second cyclone (170) in Figure 16 arranged in multiple rows.

[0180] Fig. 18 is a perspective view showing the upper euro housing (180) in Fig. 8.

[0181] Fig. 19 is a perspective view showing the upper euro housing (180) in Fig. 18 as viewed from the bottom.

[0182] Figure 20 is a plan view showing the upper euro housing (180) in Figure 18 as viewed from above.

[0183] Fig. 21 is a cross-sectional view taken along XXI-XXI in Fig. 20.

[0184] Fig. 22 is a cross-sectional view taken along XXII-XXII in Fig. 20.

[0185] Figure 23a is a front view taken along XXIIIA-XXIIIA in Figure 2.

[0186] Fig. 23b is a cross-sectional view taken along XXIIIB-XIIIB in Fig. 23a, and is a conceptual diagram showing the path along which air moves through the flow guide part (183) of the upper flow housing (180).

[0187] Fig. 23c is a cross-sectional view taken along XXIIIC-XXIIIC in Fig. 23a, and is a plan view showing air flowing into the second cyclone with the flow guide part (183) removed from the upper flow path housing (180) of Fig. 23b.

[0188] The dust collector (100) may include a housing (110), a plurality of cyclones (160, 170), and a filter unit (120).

[0189] The housing (110) may be configured to include a first cover (113), a first housing (111), a second housing (112), and a second cover (114).

[0190] The first housing (111) may be formed in a cylindrical shape. The first housing (111) may extend vertically. A first receiving space that is open vertically is formed inside the first housing (111), so that a filter unit (120), which will be described later, can be received in the second receiving space.

[0191] The first cover (113) can be combined to cover the upper opening of the first housing (111).

[0192] The first housing (111) can be called an upper housing in that it is a housing (110) placed on the upper side of the suction duct housing (153) described later.

[0193] The filter unit (120) may include a pre-filter (121) and a HEPA filter (122). The pre-filter (121) is a primary treatment filter designed to remove fine particles and various large dust particles that are harmful to the human body, such as dust and foreign substances in the air. Here, large dust particles may refer to dust particles having a size of approximately 3 to 30 μm.

[0194] The pre-filter (121) may be formed in a cylindrical shape. The pre-filter (121) may be placed inside the HEPA filter (122). Through this, air may first pass through the pre-filter (121) from the inside of the pre-filter (121).

[0195] The prefilter (121) may be placed on top of a cyclone (160, 170) to be described later. The prefilter (121) may be placed downstream of the cyclone (160, 170) based on the airflow direction. Through this, the prefilter (121) may filter fine dust in the air passing through the cyclone (160, 170).

[0196] A HEPA filter (122) is a high-performance filter that can filter fine dust of 10 μm or less.

[0197] The HEPA filter (122) may be formed in a cylindrical shape. The HEPA filter (122) may be placed on the outside of the pre-filter (121). The HEPA filter (122) is placed to surround the pre-filter (121). The HEPA filter (122) may be placed on the inside of the first housing (111).

[0198] Through this, the HEPA filter (122) can remove fine dust that has passed through the pre-filter (121).

[0199] The pre-filter (121) and HEPA filter (122) can be installed inside the first housing (111) by the filter fixing frame (123, 124).

[0200] The thickness of the pre-filter (121) is formed between the inner and outer surfaces of the pre-filter (121). The thickness of the HEPA filter (122) is formed between the inner and outer surfaces of the HEPA filter (122). The outer surface of the pre-filter (121) and the inner surface of the HEPA filter (122) are arranged to face each other and are adjacent to each other in the radial direction.

[0201] The filter fixing frame (123, 124) may be formed in a ring shape. The filter fixing frame (123, 124) may be positioned facing the upper thickness of the pre-filter (121) and the HEPA filter (122).

[0202] The filter fixing frame (123, 124) may include a first filter fixing frame (123) and a second filter fixing frame (124). The first filter fixing frame (123) is configured to fix the upper portion of the prefilter (121) and the HEPA filter (122). The first filter fixing frame (123) may be coupled to the inside of the first cover (113).

[0203] The second filter fixing frame (124) is configured to fix the lower part of the pre-filter (121) and the HEPA filter (122).

[0204] The first filter fixing frame (123) may include a first inner rib and a first outer rib. The first inner rib is formed to protrude downward from the inner end of the first filter fixing frame (123) so as to cover the upper portion of the inner surface of the prefilter (121).

[0205] The first inner rib can extend circumferentially along the inner periphery of the first filter fixing frame (123). Through this, the first inner rib can restrict the prefilter (121) and the HEPA filter (122) from moving radially inward.

[0206] The first outer rib can extend vertically from the outer end of the first filter fixing frame (123). The upper portion of the first outer rib can be supported by being joined to the inner side of the first cover (113).

[0207] The lower portion of the first outer rib may be formed to protrude downward from the outer end of the first filter fixing frame (123). The first outer rib may extend circumferentially along the outer periphery of the first filter fixing frame (123). Through this, the first outer rib may restrict the prefilter (121) and the HEPA filter (122) from moving radially outward.

[0208] The second filter fixing frame (124) may include a second inner rib and a second outer rib. The second inner rib is formed to protrude upward from the inner end of the second filter fixing frame (124) so ​​as to cover the lower part of the inner surface of the prefilter (121).

[0209] The second inner rib can extend circumferentially along the inner perimeter of the second filter fixing frame (124). Through this, the second inner rib can restrict the prefilter (121) and the HEPA filter (122) from moving radially inward.

[0210] The second outer rib may be formed to protrude upward from the outer end of the second filter fixing frame (124). The second outer rib may extend circumferentially along the outer periphery of the second filter fixing frame (124). Through this, the second outer rib may restrict the prefilter (121) and the HEPA filter (122) from moving radially outward.

[0211] A first annular space (158a) may be formed between the inner surface of the first housing (111) and the outer surface of the HEPA filter (122). Through this, air passing through the HEPA filter (122) may move in the circumferential direction along the first annular space (158a) and be sucked into the fan motor (130) described later.

[0212] The thickness of the HEPA filter (122) may be formed between the first and second surfaces of the HEPA filter (122). Here, the first surface of the HEPA filter (122) may be arranged to face the outer surface of the pre-filter (121). The second surface of the HEPA filter (122) may be arranged to face the first housing (111).

[0213] The second housing (112) may be formed in a cylindrical shape. The second housing (112) may extend vertically. A second receiving space that is open vertically is formed inside the second housing (112), so that a cyclone (160, 170) described later can be received in the second receiving space.

[0214] The second cover (114) can be combined to cover the lower opening of the second housing (112).

[0215] The second housing (112) can be called a lower housing in that it is a housing (110) placed on the lower side of the suction duct housing (153) described later.

[0216] A fan motor receiving portion (131) may be further provided on one side of the housing (110). The fan motor receiving portion (131) may be configured to receive a fan motor (130) to be described later. The fan motor receiving portion (131) is formed in a cylindrical shape. The first housing (111) and the second housing (112) may extend in the vertical direction.

[0217] The fan motor receiving portion (131) may extend in a direction perpendicular to the first housing (111). The fan motor receiving portion (131) may be placed on one side of the first housing (111) in the opposite direction of the suction portion (115) with respect to the first housing (111).

[0218] The fan motor (130) may be configured to include an impeller (133), a driving motor (140), an inverter (145), and a diffuser (146).

[0219] The rotation shaft (132) may extend along the longitudinal direction of the fan motor receiving portion (131). The rotation shaft (132) may be positioned at the center of the fan motor receiving portion (131). The rotation shaft (132) may be positioned orthogonal to the longitudinal direction of the first housing (111).

[0220] Both ends of the rotation shaft (132) can be rotatably supported by a plurality of bearings (147a, 147b).

[0221] An impeller casing (134) can be coupled to the downstream end of the motor housing (138) described later based on the direction of air flow.

[0222] The impeller casing (134) is configured to accommodate the impeller (133). The impeller casing (134) may be formed in a cylindrical shape. In the present embodiment, the impeller casing (134) may be formed in a concave shape with a neck (135) in the center.

[0223] An inlet (136) is formed on the inside of the neck (135). The inlet (136) is a passage that allows air to flow into the impeller (133).

[0224] The impeller (133) includes a hub and a plurality of blades. The hub may be formed in a conical shape. An axial coupling portion may be formed to penetrate the interior of the hub in the axial direction. The hub may be coupled to a rotating shaft (132) through the axial coupling portion.

[0225] Through this, the impeller (133) can rotate by receiving power from the drive motor (140) described later through the rotation shaft (132).

[0226] A plurality of blades may be formed to protrude from the outer surface of the hub toward the inner surface of the impeller casing (134) described later. The blades may extend in a spiral direction along the outer surface of the hub. The plurality of blades may be spaced apart along the circumference of the hub.

[0227] Through this, the plurality of blades can rotate together with the hub to form a flow of air. In addition, the plurality of blades can suck in air that has passed through the HEPA filter (122) described above.

[0228] The impeller (133) can be accommodated inside the impeller casing (134).

[0229] Based on the air flow direction, the upstream end of the impeller casing (134) can be coupled with the downstream end of the motor housing (138) to be described later. Based on the air flow direction, the downstream end of the impeller casing (134) can be coupled with the upstream end of the diffuser (146) to be described later.

[0230] An inclined portion (137) may be formed on the upstream side of the neck (135) of the impeller casing (134). The diameter of the downstream end of the motor housing (138) is larger than the diameter of the upstream end of the impeller (133). The inclined portion (137) may be formed to be inclined from the downstream end of the motor housing (138) toward the upstream end of the impeller (133). The diameter of the inclined portion (137) is formed to become smaller as it goes from the motor housing (138) toward the impeller (133).

[0231] Through this, the slope (137) can maintain the smooth flow of air sucked into the impeller (133) while minimizing the flow resistance of air passing through the driving motor (140).

[0232] The driving motor (140) can be placed upstream of the impeller (133) based on the air flow direction.

[0233] The driving motor (140) may include a motor housing (138), a rotor (141), and a stator (142).

[0234] The motor housing (138) may be formed in a cylindrical shape. An accommodation space for accommodating a rotor (141) and a stator (142) is formed inside the motor housing (138). A plurality of support portions (143) are provided on the inner surface of the motor housing (138). The support portions (143) may be formed to protrude radially inward from the inner surface of the motor housing (138) toward the outer surface of the stator core (1421).

[0235] A plurality of support members (143) can be arranged spaced apart from each other in the circumferential direction along the outer surface of the stator core (1421). The support members (143) are formed to surround the outer surface of the stator core (1421).

[0236] Through this, the support member (143) can support the stator (142).

[0237] A bypass flow path may be formed inside the motor housing (138). The bypass flow path is arranged between a plurality of support members (143). The bypass flow path may be arranged on the outside of the stator core (1421). The bypass flow path may extend circumferentially along the outer circumference of the stator core (1421).

[0238] A bypass flow path can be formed between the outer surface of the stator core (1421) and the inner surface of the motor housing (138) to allow air to bypass the inner surface of the stator core (1421).

[0239] Through this, the bypass flow path can reduce the flow resistance of air passing through the motor and secure a sufficient amount of air flow sucked into the impeller (133).

[0240] The rotor (141) may include a permanent magnet. The permanent magnet may be formed in a cylindrical shape.

[0241] The permanent magnet may be placed between a plurality of bearings (147a, 147b). The permanent magnet may be placed upstream of the impeller (133) with respect to the air flow direction.

[0242] A shaft hole may be formed on the inside of the permanent magnet so that the rotation axis (132) penetrates therethrough. The shaft hole is formed to penetrate axially on the inside of the permanent magnet.

[0243] The permanent magnet can be coupled to the rotation axis (132) through the shaft hole. Through this, the permanent magnet can rotate together with the rotation axis (132).

[0244] The stator (142) includes a stator core (1421) and a stator coil (1422).

[0245] The stator core (1421) may be formed in a cylindrical shape. The stator core (1421) may be formed by laminating and bonding a plurality of electrical steel plates.

[0246] A rotor receiving hole is formed on the inside of the stator core (1421). The rotor receiving hole is formed to penetrate axially from the center of the stator core (1421).

[0247] The stator core (1421) can be configured to accommodate and surround permanent magnets through rotor receiving holes. The outer surface of the permanent magnets is arranged radially spaced apart from the inner surface of the stator core (1421) with a gap therebetween.

[0248] A plurality of slots may be formed to penetrate axially on the inside of the stator core (1421). The plurality of slots are spaced apart from each other along the circumference of the stator core (1421).

[0249] The stator coil (1422) can be wound on the inside of the stator core (1421) through a plurality of slots. The stator coil (1422) is electrically connected to the battery (150) and can receive power from the battery (150).

[0250] An insulator (144) may be placed between the stator core (1421) and the stator coil (1422). The insulator (144) is configured to surround the stator core (1421). Through this, the insulator (144) can electrically insulate between the stator core (1421) and the stator coil (1422).

[0251] Through this, power from the battery (150) can be applied to the stator coil (1422). When power is applied to the stator coil (1422), a magnetic field can be formed around the stator coil (1422).

[0252] The permanent magnet interacts with the magnetic field generated from the stator (142), so that the permanent magnet and the rotation shaft (132) can rotate together. The driving motor (140) can drive the impeller (133) by transmitting power to the impeller (133) through the rotation shaft (132).

[0253] The inverter (145) may be placed upstream of the driving motor (140) with respect to the airflow direction. The inverter (145) may include a printed circuit board (1451), an IGBT (1452), and a capacitor (1453). The IGBT (1452) and the capacitor (1453) may be mounted on the printed circuit board (1451).

[0254] A stator coil (1422) can be electrically connected to a printed circuit board (1451). An inverter (145) can apply current to the stator coil (1422) through the printed circuit board (1451).

[0255] The inverter (145) may include a current conversion unit that converts the direct current of the battery (150) into alternating current. The inverter (145) may control the current applied to the driving motor (140).

[0256] The diffuser (146) is configured to stabilize the flow of air passing through the impeller (133) in one direction and discharge it.

[0257] The diffuser (146) can be coupled to the downstream end of the impeller casing (134) based on the air flow direction.

[0258] The diffuser (146) may include an inner wall portion (1461), an outer wall portion (1462), and a vane (1463). The inner wall portion (1461) and the outer wall portion (1462) may each be formed in a cylindrical shape. The outer wall portion (1462) may be formed to surround the inner wall portion (1461) on the outside of the inner wall portion (1461). The outer wall portion (1462) is arranged to be spaced radially outward from the outer peripheral surface of the inner wall portion (1461).

[0259] A plurality of vanes (1463) may be provided between the inner wall portion (1461) and the outer wall portion (1462). The plurality of vanes (1463) are spaced apart from each other in the circumferential direction along the outer surface of the inner wall portion (1461). The vanes (1463) extend radially between the outer surface of the inner wall portion (1461) and the inner surface of the outer wall portion (1462).

[0260] The outer end of the vane (1463) may be connected to the inner surface of the outer wall portion (1462). The inner end of the vane (1463) may be connected to the outer surface of the inner wall portion (1461). The vane (1463) is formed to be inclined in the circumferential direction with respect to the axial direction. The vane (1463) may be formed in a curved shape.

[0261] Through this, the vane (1463) of the diffuser (146) can convert the rotational flow of air rotated by the impeller (133) into a linear flow in the axial direction.

[0262] The diffuser (146) may include a first diffuser (146a) and a second diffuser (146b).

[0263] The first diffuser (146a) can be accommodated and coupled to the inner side of the downstream end of the impeller casing (134) based on the air flow direction.

[0264] The second diffuser (146b) can be coupled to the downstream end of the first diffuser (146a) based on the air flow direction.

[0265] The plurality of bearings (147a, 147b) may be composed of a first bearing (147a) and a second bearing (147b). The first bearing (147a) may rotatably support one end of the rotation shaft (132). The second bearing (147b) may rotatably support the other end of the rotation shaft (132).

[0266] The first bearing (147a) may be accommodated and supported in the first bearing housing (148a). The first bearing housing (148a) may be arranged at the upstream end of the motor housing (138) with respect to the air flow direction. The first bearing housing (148a) may be formed integrally with the motor housing (138).

[0267] In this embodiment, the bearings (147a, 147b) may be implemented as ball bearings. The ball bearing may include an inner ring, an outer ring, and multiple balls. The inner ring is press-fitted to the rotational shaft (132). The outer ring may be coupled to a holder (1491) of a preloading device described later.

[0268] The balls are arranged between the inner and outer rings so that they can be in rolling contact. The inner ring is supported by a plurality of balls and can rotate relative to the outer ring.

[0269] A pre-pressure applying device may be provided inside the first bearing housing (148a).

[0270] The preloading device may include an elastic member (149) and a holder (1491).

[0271] The elastic member (149) may be implemented as a coil spring. The coil spring may extend in a spiral direction along the axial direction. The holder (1491) may be formed in a cylindrical shape. The holder (1491) is configured to surround the outer ring of the bearing. The inner circumferential surface of the holder (1491) may be coupled to the outer ring of the bearing (147a, 147b).

[0272] An elastic member support groove may be formed inside the holder (1491). The elastic member (149) is received and supported in the elastic member support groove. Through this, the elastic member (149) can apply axial pressure toward the inverter (145).

[0273] The elastic member (149) minimizes the gap between the ball and the inner ring and the gap between the ball and the outer ring to allow rolling contact, thereby reducing wear of the bearing (147a, 147b) due to friction between the ball and the inner and outer rings and extending the lifespan.

[0274] The second bearing (147b) may be accommodated and supported within the second bearing housing (148b). The second bearing housing (148b) may be positioned at the upstream end of the first diffuser (146a) with respect to the air flow direction. The second bearing housing (148b) may be formed integrally with the first diffuser (146a).

[0275] A battery receiving portion (151) may be further provided on the other side of the housing (110). The battery receiving portion (151) may be configured to receive a battery (150). The battery receiving portion (151) may be formed in a rectangular shape.

[0276] The battery receiving portion (151) may extend in a direction perpendicular to the second housing (112). The battery receiving portion (151) may be positioned on one side of the second housing (112) in the opposite direction of the suction portion (115) with respect to the second housing (112).

[0277] The fan motor receiving portion (131) and the battery receiving portion (151) can be arranged spaced apart from each other in the vertical direction.

[0278] The handle portion (152) may be positioned between the fan motor receiving portion (131) and the battery receiving portion (151). The handle portion (152) may have an oval cross-sectional shape. The handle portion (152) may be configured so that the user can wrap it with their fingers and palm.

[0279] The handle portion (152) can be extended at a predetermined angle with respect to the extension direction of the first housing (111) and the second housing (112). The handle portion (152) can be extended in a direction intersecting the extension direction of the fan motor receiving portion (131) and the battery receiving portion (151).

[0280] One end of the handle part (152) can be connected to the fan motor receiving part (131). The other end of the handle part (152) can be connected to the battery receiving part (151). Through this, the handle part (152) connects the fan motor receiving part (131) and the battery receiving part (151), and supports or can be supported by the fan motor receiving part (131) and the battery receiving part (151).

[0281] One end of the handle portion (152) may be spaced apart from the first housing (111). The other end of the handle portion (152) may be spaced apart from the second housing (112). The distance between one end of the handle portion (152) and the first housing (111) may be shorter than or equal to the distance between the other end of the handle portion (152) and the second housing (112). In the present embodiment, the distance between one end of the handle portion (152) and the first housing (111) is shown to be shorter than the distance between the other end of the handle portion (152) and the second housing (112).

[0282] The dust collector (100) may further include a suction path housing (153), an inner wall (155), a partition wall (156), and a suction path guide (157).

[0283] The suction passage housing (153) may be formed in a cylindrical shape. The suction passage housing (153) may be provided on the inside of the first housing (111). The outer surface of the suction passage housing (153) may be joined to the inner surface of the first housing (111) in surface contact.

[0284] An inner wall portion (155) may be arranged inside the suction passage housing (153). The inner wall portion (155) may be formed in a cylindrical shape. The inner wall portion (155) has a diameter smaller than the diameter of the suction passage housing (153). The inner wall portion (155) is arranged to be spaced radially inward from the inner circumferential surface of the suction passage housing (153).

[0285] The length of the inner wall (155) is shorter than the length of the suction duct housing (153).

[0286] A second annular space (158b) can be formed between the suction duct housing (153) and the inner wall portion (155). The second annular space (158b) can form a path for air sucked from the suction portion (115).

[0287] A partition wall (156) is provided between the suction passage housing (153) and the inner wall portion (155). The partition wall (156) may extend radially. An outer end of the partition wall (156) may be connected to the inner circumferential surface of the suction passage housing (153). An inner end of the partition wall (156) may be connected to the outer circumferential surface of the inner wall portion (155).

[0288] For example, the inner end of the partition wall (156) may extend radially outward from the upper end of the inner wall portion (155) toward the inner surface of the suction duct housing (153). The partition wall (156) may extend circumferentially along the perimeter of the inner end.

[0289] Through this, the partition wall (156) can be placed between the first annular space (158a) and the second annular space (158b) to partition the first annular space (158a) and the second annular space (158b). The partition wall (156) independently separates the first annular space (158a) and the second annular space (158b).

[0290] Accordingly, the suction air delivered from the suction pipe (116) does not move to the first annular space (158a) but moves to the second annular space (158b).

[0291] The second annular space (158b) is located below the first annular space (158a). The second annular space (158b) is located below the partition wall (156). The second annular space (158b) is located below the filter unit (120).

[0292] The inner wall portion (155) can extend downward from the inner end of the partition wall (156).

[0293] A suction port (154) is formed on one side of the suction housing (153) to protrude toward the suction pipe (116). The suction port (154) is connected to the downstream end of the suction pipe (116) based on the air flow direction. The suction port (154) can extend tangentially from one side of the outer surface of the suction housing (153) toward the downstream end of the suction pipe (116).

[0294] The suction path guide (157) may be positioned at the bottom of the partition wall (156). The suction path guide (157) may extend in a spiral direction along the second annular space (158b) starting from the suction port (154). Through this, the suction path guide (157) may induce a rotational flow of air.

[0295] One side of the suction path guide (157) can be coupled to the partition wall (156). The other side of the suction path guide (157) can be coupled to the lower part of the suction part (115) path housing (110).

[0296] The suction path guide (157) may extend downward in a spiral direction from the second annular space (158b). Through this, air sucked in through the suction port (154) may rotate along the suction path guide (157) and pass through the mesh net (161) of the first cyclone (160) described later.

[0297] The dust collector (100) includes an upper flow housing (180) and a cyclone. The upper flow housing (180) may be placed on the upper portion of the cyclone. The upper flow housing (180) may be coupled to the inner wall (155) of the suction flow housing (153).

[0298] The upper flow housing (180) can be combined with a cyclone. A detailed description of the upper flow housing (180) will be described later.

[0299] The cyclone (160, 170) is configured to remove dust by using centrifugal force to rotate the air.

[0300] The cyclone (160, 170) may be configured to include a first cyclone (160) and a plurality of second cyclones (170). The first cyclone (160) may include a mesh net (161), an outer case (162), and an inner case (163).

[0301] The mesh net (161) may be formed in a cylindrical shape. The diameter of the mesh net (161) is smaller than the diameter of the second housing (112). The diameter of the mesh net (161) may be formed to be the same as or similar to the diameter of the inner wall portion (155) of the above-described suction channel housing (153) or the upper channel housing (180). The mesh net (161) may be arranged inside the second housing (112).

[0302] The mesh net (161) can extend vertically. The upper part of the mesh net (161) can be connected to the lower part of the upper flow housing (180). The lower part of the mesh net (161) can be connected to the upper part of the outer case (162) described later.

[0303] A second annular space (158b) may be formed between the second housing (112) and the mesh net (161). The second annular space (158b) may extend in a circumferential direction along the perimeter of the mesh net (161).

[0304] The mesh net (161) has a plurality of openings (1611). The mesh net (161) allows air to pass through the plurality of openings (1611), but can restrict the passage of foreign substances such as large dust. The air guided by the suction path guide (157) of the suction path housing (153) can pass through the mesh net (161) and then move to the second cyclone (170).

[0305] The outer case (162) may be formed in a cylindrical shape. The outer case (162) extends vertically. The diameter of the outer case (162) is smaller than the diameter of the second housing (112). The outer case (162) may be placed inside the second housing (112).

[0306] A second annular space (158b) may be formed between the second housing (112) and the outer case (162). The second annular space (158b) may extend in a circumferential direction along the periphery of the outer case (162).

[0307] The upper part of the outer case (162) can be connected to the lower part of the mesh net (161). The second annular space (158b) formed between the second housing (112) and the outer case (162) is vertically connected to the second annular space (158b) formed between the suction duct housing (153) and the inner wall (155).

[0308] The outer surface of the mesh net (161) and the outer surface of the outer case (162) may have the same diameter. The outer surface of the mesh net (161) and the outer surface of the outer case (162) may form the same circumference in the vertical direction.

[0309] Through this, the first cyclone (160) can move dust filtered through the mesh net (161) to the inner surface of the second housing (112) by centrifugal force caused by the rotational flow of air, thereby colliding with the second housing (112). The dust colliding with the second housing (112) can fall downward toward the second cover (114) due to its own weight.

[0310] The inner case (163) may be placed inside the outer case (162). The inner case (163) may include a cylindrical portion (1631) and a concave portion (1632). The cylindrical portion (1631) is spaced downward from the lower end of the second cyclone (170) to be described later. The cylindrical portion (1631) may be formed in a cylindrical shape with an empty interior.

[0311] The upper part of the cylindrical part (1631) may be positioned lower than or equal to the lower part of the outer case (162).

[0312] The outer case (162) and the cylindrical portion (1631) may be arranged concentrically when viewed from above. The diameter of the cylindrical portion (1631) is smaller than the diameter of the outer case (162). The cylindrical portion (1631) may be arranged on the inside of the outer case (162) when viewed from above.

[0313] The concave portion (1632) is provided on the inside of the outer case (162).

[0314] The concave portion (1632) is configured to connect the inner surface of the outer case (162) and the upper end of the cylindrical portion (1631). The upper end of the concave portion (1632) can be connected to the inner surface of the outer case (162), and the lower end of the concave portion (1632) can be connected to the upper end of the cylindrical portion (1631).

[0315] The concave portion (1632) may be formed radially inwardly toward the upper end of the cylindrical portion (1631) on the inner surface of the outer case (162). The concave portion (1632) may extend circumferentially along the inner surface of the outer case (162).

[0316] The concave portion (1632) may have a conical cross-sectional shape with a concave slope.

[0317] The upper part of the cylindrical portion (1631) can be connected to the lower part of the concave portion (1632). The lower part of the cylindrical portion (1631) can be extended so as to be in contact with the second cover (114).

[0318] A dust storage unit (164) can be formed between the inner surface of the second housing (112) and the outer surface of the inner case (163).

[0319] According to this configuration, the first cyclone (160) rotates the air drawn into the second annular space (158b) from the suction housing (153), thereby causing large dust particles having a higher specific gravity than the air to fall from the mesh (161) by centrifugal force and move toward the inner surface of the second housing (112). The dust in the air can be stored in the dust storage unit (164) by gravity after hitting the inner surface of the second housing (112).

[0320] The second cyclone (170) is provided inside the first cyclone (160). The second cyclone (170) receives air from which dust has been removed (separated) by the first cyclone (160) and is configured to remove (separate) fine dust from the air.

[0321] The second cyclone (170) can be connected to the first cyclone (160).

[0322] The second cyclone (170) is provided in multiple units. The present embodiment shows a configuration in which the number of second cyclones (170) is 30. The second cyclone (170) includes a casing (172), a guide vane (173), and a vortex finder (174).

[0323] The casing (172) may be formed in a cylindrical shape. The casing (172) may be extended in a vertical direction. The length of the casing (172) may be formed to be greater than the diameter of the casing (172).

[0324] The casing (172) extends vertically. The casing (172) may be composed of a first casing (1721) and a second casing (1722). The first casing (1721) may be formed in a cylindrical shape with an empty interior. The diameter of the first casing (1721) may be formed to be constant along the vertical direction.

[0325] The hollow portion of the first casing (1721) can be formed to penetrate in the vertical direction.

[0326] The first casing (1721) may be positioned above the partition (176) described later. The first casing (1721) may be referred to as the upper casing. The second casing (1722) may be positioned below the partition (176). The second casing (1722) may be referred to as the lower casing.

[0327] The first casing (1721) may be provided in multiple pieces. The multiple first casings (1721) may be arranged in a radial or circumferential direction or in a continuous manner along the corners of a hexagon.

[0328] A plurality of adjacent first casings (1721) can be arranged so that their outer surfaces are in contact with each other. Through this, the plurality of first casings (1721) can be connected to each other as one body.

[0329] A plurality of first casings (1721) can be placed inside a plurality of mesh networks (161).

[0330] The second casing (1722) can extend vertically. The second casing (1722) can extend from the lower end of the first casing (1721) at a predetermined angle with respect to the vertical direction. The upper end of the second casing (1722) can be integrally connected to the lower end of the first casing (1721).

[0331] The diameter of the upper part of the second casing (1722) is the same as the diameter of the lower part of the first casing (1721). The upper part of the second casing (1722) is formed to be in communication with the lower part of the first casing (1721).

[0332] The second casing (1722) may be formed in a cone shape with a hollow interior. The hollow portion of the second casing (1722) may be formed to penetrate vertically.

[0333] The second casing (1722) may have different diameters in the vertical direction. The diameter may be formed to gradually decrease from the top of the second casing (1722) to the bottom of the second casing (1722). The diameter of the bottom of the second casing (1722) may be smaller than the diameter of the top of the second casing (1722). When looking at the second casing (1722) in the vertical direction, the circle formed at the top of the second casing (1722) is arranged to surround the circle formed at the bottom of the second casing (1722).

[0334] A fine dust discharge port (1723) may be formed at the bottom of the second casing (1722).

[0335] Through this, the second casing (1722) can minimize the backflow of fine dust discharged through the fine dust discharge port (1723).

[0336] The vortex finder (174) may be formed in a hollow cylindrical shape. The vortex finder (174) may be formed to penetrate vertically. The diameter of the vortex finder (174) is smaller than the diameter of the first casing (1721). The vortex finder (174) is provided on the upper inner side of the first casing (1721).

[0337] The vortex finder (174) can be accommodated inside the first casing (1721). The center of the vortex finder (174) can be arranged identically to the center of the first casing (1721). The vortex finder (174) can extend in the vertical direction.

[0338] For example, the upper part of the vortex finder (174) may be arranged to protrude above the upper part of the upper inlet part (175) to be described later. The lower part of the vortex finder (174) may be arranged to be received inside the upper part of the upper inlet part (175) and the upper part of the first casing (1721). Here, the upper part of the vortex finder (174) means the upper half when the length of the vortex finder (174) is divided into two equal parts in the vertical direction. The lower part of the vortex finder (174) means the lower half of the vortex finder (174).

[0339] An upper inlet (175) may be coupled to the upper end of the first casing (1721). The upper inlet (175) may be formed in a ring shape. The upper inlet (175) may be formed to have the same diameter as the first casing (1721).

[0340] The upper inlet (175) may include an inner surface facing the vortex finder (174) and an outer surface facing the mesh (161). The thickness of the upper inlet (175) may be formed between the inner and outer surfaces of the upper inlet (175).

[0341] A coupling protrusion (1751) may be formed to protrude downward from the lower end of the upper inlet (175). The coupling protrusion (1751) may extend along the circumference of the upper inlet (175).

[0342] A coupling groove (1752) may be formed to be radially recessed at the upper end of the first casing (1721). The coupling groove (1752) may extend circumferentially along the inner periphery of the first casing (1721). Through this, the coupling projection (1751) may be inserted and coupled into the coupling groove (1752), so that the upper inlet portion (175) may be fastened to the upper end of the first casing (1721).

[0343] A tapered portion may be formed on the upper inner surface of the upper inlet portion (175). The tapered portion may extend circumferentially along the inner periphery of the upper inlet portion (175). The tapered portion may be formed to be inclined at a preset angle with respect to the vertical direction so that the diameter of the upper inlet portion (175) increases from the middle portion of the inner surface of the upper inlet portion (175) to the upper portion.

[0344] Through this, air passing through the mesh net (161) can easily flow into the inner space of the second cyclone (170) through the upper part of the upper inlet (175), i.e., the inlet (1731) between the inner surface of the first casing (1721) and the outer surface of the vortex finder (174).

[0345] A guide vane (173) is arranged between the first casing (1721) and the vortex finder (174). The guide vane (173) extends radially. The inner end of the guide vane (173) can be coupled to the outer circumferential surface of the vortex finder (174). The outer end of the guide vane (173) can be coupled to the inner circumferential surface of the upper inlet (175).

[0346] The guide vane (173) is formed to be inclined downward along a spiral direction. Through this, the guide vane (173) can induce the flow of air flowing in through the upper inlet (175) into a rotational motion.

[0347] A plurality of guide vanes (173) are provided. In this embodiment, four guide vanes (173) are provided. The plurality of guide vanes (173) are arranged spaced apart from each other in the circumferential direction along the outer circumference of the vortex finder (174).

[0348] An inlet (1731) may be formed between two guide vanes (173) adjacent to each other in the circumferential direction. A plurality of inlets (1731) may be provided. In this embodiment, four inlets (1731) are formed. Through this, air introduced through the upper inlet (175) can move along the guide vane (173) through the plurality of inlets (1731) and rotate.

[0349] The partition (176) may extend radially along the mesh net (161) or the outer case (162). The partition (176) may extend circumferentially along the inner perimeter of the mesh net (161) or the outer case (162).

[0350] The partition (176) can be placed in the space between the plurality of casings (172). The partition (176) is configured to connect the outer surfaces of the plurality of adjacent casings (172).

[0351] Additionally, the partition (176) can extend radially from the outer surface of the casing (172) toward the inner surface of the outer case (162).

[0352] More specifically, the partition (176) may extend radially between the lower outer surface of the first casing (1721) and the lower inner surface of the mesh net (161). The outer end of the partition (176) may be connected to the lower end of the mesh net (161), and the inner end of the partition (176) may be connected to the lower end of the first casing (1721).

[0353] The partition (176) is configured to partition the third annular space (158c) between the inner surface of the mesh (161) of the first cyclone (160) and the outer surface of the first casing (1721) of the second cyclone (170) and the fine dust storage unit (165) to be described later.

[0354] Through this, air passing through the mesh net (161) can be introduced into the interior of the casing (172) of the second cyclone (170) through the inlet (1731) of the upper inlet (175) in the third annular space (158c).

[0355] Through this, the second cyclone (170) can rotate and flow the air introduced into the interior of the casing (172) by the guide vane (173). In addition, the second cyclone (170) can separate the fine dust from the air by gravity while colliding the fine dust with the inner surface of the casing (172) by centrifugal force.

[0356] Since fine dust has a relatively higher specific gravity than air, it can fall through the fine dust discharge port (1723) of the second casing (1722).

[0357] A fine dust storage unit (165) may be formed inside the inner case (163). The fine dust discharge port (1723) of the second casing (1722) may be connected to the fine dust storage unit (165). Through this, fine dust separated from the air may be discharged from the second cyclone (170) to the fine dust storage unit (165) through the fine dust discharge port (1723).

[0358] A supporter (177) may be provided in the partition (176). The supporter (177) may extend downward from the outer periphery of the partition (176). The supporter (177) may be formed in a cylindrical shape. The supporter (177) may extend in the circumferential direction.

[0359] The supporter (177) can extend vertically between the compartment (176) and the inner case (163). The supporter (177) can be located at the lower portion of the compartment (176).

[0360] The outer surface of the supporter (177) can be joined to the inner surface of the outer case (162) in surface contact. A plurality of fastening grooves (1772) and fastening projections (1771) can be formed between the outer surface of the supporter (177) and the inner surface of the outer case (162).

[0361] In this embodiment, a plurality of fastening projections (1771) are formed to protrude radially outward from the outer surface of the supporter (177). A plurality of fastening grooves (1772) are formed to be recessed radially outward from the inner surface of the outer case (162).

[0362] Through this, the supporter (177) can be coupled to the inside of the outer case (162) to restrict the movement of the plurality of second cyclones (170) in the radial direction. The fastening protrusion (1771) and the fastening groove (1772) can restrict the supporter (177) from moving up and down on the inside of the outer case (162).

[0363] A plurality of second cyclones (170) can be arranged in a plurality of rows, i.e., rows 1 to M, from the inside to the outside in the radial direction of the first cyclone (160). Here, M is a natural number greater than or equal to 3. In this embodiment, a plurality of second cyclones (170) are arranged in rows 1 to M.

[0364] The second cyclone (170a) of the first row can be arranged radially spaced apart from the center of the first cyclone (160) by a first interval.

[0365] The second cyclone (170b) of the second row can be arranged radially apart from the center of the first cyclone (160) by a second interval. The second interval is larger than the first interval. The second cyclone (170b) of the second row is arranged outside the second cyclone (170a) of the first row.

[0366] The second cyclone (170c) of the third row can be arranged radially apart from the center of the first cyclone (160) by a third interval. The third interval is larger than the second interval. The second cyclone (170c) of the third row is arranged outside the second cyclone (170b) of the second row.

[0367] A plurality of second cyclones (170) may be arranged in each column. In each column, a plurality of second cyclones (170) may be arranged in a continuous or spaced manner in the circumferential direction.

[0368] The second cyclones (170a, 170b, 170c) of the first to third rows can be placed at the vertices or corners of hexagons with the same center and different sizes.

[0369] In this embodiment, the first row of second cyclones (170a) is provided in six units, and the six second cyclones (170) can be arranged in succession along the corners of the first hexagon. The center of each of the six second cyclones (170) in the first row can be arranged at the vertices of the first hexagon.

[0370] The second row of second cyclones (170b) is provided in 12 units, and the 12 second cyclones (170) can be arranged in succession along the corners of the second regular hexagon (171b). The centers of each of the 12 second cyclones (170) in the second row can be arranged at the vertices and corner centers of the hexagon. Here, the second regular hexagon (171b) has the same center as the first regular hexagon (171a) and is larger than the first regular hexagon (171a).

[0371] The second cyclones (170c) of the third row are provided in 12 units, and the 12 second cyclones (170) can be arranged continuously or spaced apart along the corners of the third hexagon. The center of each of the 12 second cyclones (170) in the third row can be arranged at the corners between the vertices of the third hexagon. Here, the third regular hexagon (171c) has the same center as the second regular hexagon (171b) and is larger than the second regular hexagon (171b).

[0372] The second cyclones (170c) of the third row are arranged in pairs of two each at the corners between the vertices of the third hexagon, and the two second cyclones (170) arranged adjacent to different corners of the third hexagon can be arranged spaced apart from each other in the circumferential direction at a preset interval.

[0373] A plurality of second cyclones (170a) of the first row, which are arranged with their centers at the vertices of the first regular hexagon (171a), can be arranged to overlap radially with a plurality of second cyclones (170b) of the second row, which are arranged with their centers at the vertices of the second regular hexagon (171b).

[0374] A second row of second cyclones (170b) arranged with their centers at the center of the corners connecting the two vertices of the second regular hexagon (171b) are arranged radially without overlapping with a plurality of third row of second cyclones (170c) arranged with their centers at the corners connecting the two vertices of the third regular hexagon (171c).

[0375] A second row of second cyclones (170b) arranged with their centers at the center of the corners connecting two vertices of a second regular hexagon (171b) may be arranged to be surrounded and circumscribed by a plurality of first row of second cyclones (170a) arranged with their centers at the corners connecting two vertices of a first regular hexagon (171a), a plurality of second row of second cyclones (170b) arranged with their centers at the corners connecting two vertices of a third regular hexagon (171c).

[0376] The vertices of the first regular hexagon (171a) to the third regular hexagon (171c) may be located on the same virtual center line that passes radially through the center of the first cyclone (160).

[0377] In this specification, the statement that a plurality of second cyclones (170) are externally connected to each other means that the outer surfaces of the first casings (1721) of each second cyclone (170) are externally connected to each other.

[0378] The second cyclones (170a) of the first row can be arranged so as to be external to each other along the line segments (sides) of the first regular hexagon (171a).

[0379] The second cyclones (170b) of the second row can be arranged so as to be external to each other along the line segments (sides) of the second regular hexagon (171b).

[0380] The second cyclones (170c) of the third row can be arranged so as to be external to each other along the line segments (sides) of the third regular hexagon (171c).

[0381] The second cyclones (170a) of the first row and the second cyclones (170b) of the second row, which are radially adjacent, may be arranged so as to be external to each other. The second cyclones (170a) of the first row and the second cyclones (170b) of the second row, which are radially adjacent, may be arranged so as to be external to each other while overlapping each other in the radial direction.

[0382] The second cyclone (170b) of the second row and the second cyclone (170c) of the third row, which are radially adjacent, can be arranged to be external to each other.

[0383] At least one second cyclone (170) among the second rows of second cyclones (170b) arranged externally to each other along the corners of the second regular hexagon (171b) may be arranged externally to each other without overlapping in the radial direction with the second cyclones (170a) of the first row arranged externally to each other with their centers centered at the vertices of the first regular hexagon (171a).

[0384] In this embodiment, the six second cyclones (170) arranged at the center of the corners connecting the two vertices of the second regular hexagon (171b) can be arranged so as to be external to each other without overlapping in the radial direction with the second cyclones (170a) of the first row arranged so as to be external to each other with their centers at the vertices of the first regular hexagon (171a).

[0385] The second row of second cyclones (170b) arranged externally to each other along the edges of the second regular hexagon (171b) can be arranged externally to each other without overlapping in the radial direction with a plurality of third row of second cyclones (170c) arranged externally to each other with their centers centered on the line segment (side) connecting the two vertices of the third regular hexagon (171c).

[0386] The second cyclones (170) arranged to be externally connected to each other with their centers at the vertices of the second regular hexagon (171b) among the second cyclones (170b) of the plurality of second rows and the second cyclones (170) arranged to be externally connected to each other with their centers at the line segments (sides) connecting the two vertices of the second regular hexagon (171b) can be alternately connected to each other along the edges of the second regular hexagon (171b).

[0387] The number of peripheral second cyclones (170) that are in contact with the outer surface of one of the second cyclones (170a) of the plurality of first rows is five.

[0388] The number of peripheral second cyclones (170) that are in contact with the outer surface of one of the second cyclones (170b) of the plurality of second rows is six.

[0389] The number of peripheral second cyclones (170) that are externally connected to the outer surface of one of the second cyclones (170c) of the third row is three.

[0390] According to this configuration, the second cyclones (170) of multiple rows are arranged in external contact with each other, thereby minimizing the space between the second cyclones (170) and securing a greater number of second cyclones (170) in a limited space. In addition, by increasing the number of cyclones (160, 170), the separation performance of the vacuum cleaner can be improved.

[0391] However, among the second cyclones (170) of the multiple rows described above, the second cyclone (170c) of the third row, which is arranged close to the intake port (154), can smoothly allow air sucked through the intake port (154) to flow into the inlet port (1731) of the second cyclone (170), but there is a problem in that air cannot be smoothly supplied to the second cyclone (170b) of the first or second row, which is arranged far from the intake port (154).

[0392] Therefore, in order to maximize the separation performance of the vacuum cleaner, it is important to allow for the addition of the number of cyclones while ensuring a smooth supply of air to the second cyclones (170b) of the first and second rows located far from the intake (154).

[0393] To solve the above-described problem, an upper flow housing (180) is mounted on the upper portion of the dust collector (100). The upper flow housing (180) is positioned below the filter unit (120). The upper flow housing (180) may be mounted on the upper portion of the cyclone. The upper flow housing (180) may be formed in a cylindrical shape.

[0394] The upper flow path housing (180) can be mounted on the suction flow path housing (153). The inner wall (155) of the suction flow path housing (153) is formed to surround the outer surface of the upper flow path housing (180). The upper flow path housing (180) can be accommodated and joined to the inner wall (155).

[0395] The diameter of the outer surface of the upper flow path housing (180) may be formed to correspond to the diameter of the inner surface of the inner wall portion (155). The outer surface of the upper flow path housing (180) may be joined to the inner surface of the inner wall portion (155) so as to be in surface contact. Through this, the upper flow path housing (180) may be restricted from moving in the radial direction by the inner wall portion (155).

[0396] A plurality of fastening portions (1801) may be formed to protrude radially outward from the outer surface of the upper channel housing (180). The plurality of fastening portions (1801) may be arranged to be spaced apart from each other in the circumferential direction along the outer surface of the upper channel housing (180).

[0397] A plurality of fastener receiving grooves (1802) may be formed to be sunken radially inward on the inner surface of the inner wall portion (155). The plurality of fastener receiving grooves (1802) may be arranged to be spaced apart from each other in the circumferential direction along the inner surface of the inner wall portion (155).

[0398] The fastening member (1801) can be accommodated and coupled in the fastening member receiving groove (1802). Through this, the upper flow housing (180) can be restricted from moving up and down on the inner wall (155) by the combination of the fastening member receiving groove (1802) and the fastening member (1801).

[0399] Accordingly, the upper euro housing (180) can be supported by the inner wall (155).

[0400] A mounting guide (1803) may be formed to protrude radially outward from the outer surface of the upper channel housing (180). The mounting guide (1803) may extend circumferentially along the outer surface of the upper channel housing (180) to surround one end of the mesh net (161).

[0401] A mounting groove may be formed on one side of the mounting guide (1803). The mounting groove may be formed to be radially recessed on the outer surface of the mounting guide (1803). The upper end of the mesh net (161) may be inserted into the mounting groove and coupled. Through this, the mounting guide (1803) may facilitate coupling of the mesh net (161) and the upper channel housing (180).

[0402] The upper euro housing (180) may be equipped with a euro base portion (181) and a flow guide portion (183).

[0403] The euro base portion (181) may be located at the lower end of the upper euro housing (180). The euro base portion (181) may extend radially from the inner circumferential surface of the upper euro housing (180). The euro base portion (181) may extend circumferentially. The euro base portion (181) may be formed in a circular shape.

[0404] The outer end of the euro base portion (181) can be integrally connected to the inner surface of the upper euro housing (180). The euro base portion (181) can be positioned in the opposite direction of the mounting groove based on the thickness of the upper euro housing (180).

[0405] Through this, the upper euro housing (180) can reinforce the reduced rigidity due to the mounting groove by the euro base part (181). The euro base part (181) can secure support for the upper part of the mesh net (161) by reinforcing the rigidity of the upper euro housing (180).

[0406] The euro base section (181) is configured to divide the euro extension section (190) of the upper euro housing (180) to be described later and the third annular space (158c).

[0407] The third annular space (158c) is a space between the inner surface of the mesh net (161) and the outer surface of the first casing (1721) of the second cyclone (170), and can transmit air passing through the mesh net (161) to the inlet (1731) of the second cyclone (170).

[0408] The vortex finder (174) of the second cyclone (170) may be formed to protrude upward from the upper inlet (175) of the first casing (1721). An outlet (1741) is formed at the top of the vortex finder (174). Through this, air from which fine dust has been separated by the second cyclone (170) can be discharged to the flow path extension (190) described later through the outlet (1741) of the vortex finder (174).

[0409] The thickness of the flow path base portion (181) may be formed between the first and second surfaces of the flow path base portion (181). The first surface of the flow path base portion (181) may be arranged toward the second cyclone (170). The second surface of the flow path base portion (181) may be arranged toward the flow path extension portion (190) to be described later.

[0410] A plurality of discharge holes (182) may be formed to penetrate vertically in the euro base portion (181). The discharge holes (182) have the same diameter as the inner diameter of the discharge port (1741). The discharge holes (182) of the euro base portion (181) are arranged correspondingly in the vertical direction so as to communicate with the discharge port (1741).

[0411] A discharge port coupling part (1821) is provided around the discharge hole (182) of the euro base part (181). The discharge port coupling part (1821) may be formed to be recessed along the circumference direction so as to surround the discharge hole (182) on the first surface of the euro base part (181).

[0412] The outer diameter of the discharge port coupling portion (1821) can be formed to be the same as the outer diameter of the discharge port (1741). The discharge port (1741) can be inserted into and coupled to the discharge port coupling portion (1821).

[0413] Through this, it is possible to prevent air discharged through the discharge port (1741) from leaking into the third annular space (158c).

[0414] The euro base section (181) blocks the upper part of the third annular space (158c), thereby preventing the air discharged through the discharge port (1741) of the second cyclone (170) from flowing back into the third annular space (158c).

[0415] In addition, the euro base section (181) blocks the upper part of the third annular space (158c), thereby preventing the air passing through the mesh net (161) from mixing with the air discharged through the discharge port (1741) by bypassing the second cyclone (170).

[0416] The flow guide portion (183) can be formed to protrude upward from the second surface of the flow base portion (181). A flow path through which air can flow is formed inside the flow guide portion (183).

[0417] The flow guide unit (183) is configured to evenly supply air that has passed through the mesh net (161) from the second cyclone (170c) of the third row located at the outermost side among the multiple rows of second cyclones (170) to the second cyclone (170a) of the first row located at the innermost side.

[0418] To this end, the flow guide part (183) divides the 360 ​​degrees of the second surface of the euro base part (181) into N equal parts, thereby evenly distributing the flow rate of air supplied to the second cyclone (170) of multiple rows.

[0419] The flow guide part (183) may be configured to include a plurality of first flow guide parts (184) and second flow guide parts (187).

[0420] The first flow guide portion (184) may extend radially. A plurality of first flow guide portions (184) may be arranged at predetermined angular intervals along the circumferential direction of the flow base portion (181).

[0421] In this embodiment, a plurality of first flow guide parts (184) are arranged at intervals of 60 degrees along the circumference so as to divide 360 ​​degrees of the second surface of the euro base part (181) into six equal parts.

[0422] A first flow path (1842) is formed to allow air to flow inside the first flow guide part (184). A flow path inlet (1841) may be formed to be radially open on the radially outer side of the first flow guide part (184).

[0423] Through this, air passing through the mesh net (161) can be introduced radially inward along the first flow path (1842) of the first flow guide part (184) through the flow path inlet (1841) of the first flow guide part (184).

[0424] The radially inner side of the first flow guide part (184) can be connected to the second flow guide part (187) to be described later. Through this, the first flow guide part (184) can transmit air flowing along the first flow path (1842) to the second flow guide part (187).

[0425] The second flow guide part (187) can extend in the circumferential direction. The second flow guide part (187) is configured to surround the outer side of the second cyclone (170a) of the first row, which is located at the innermost side among the plurality of rows of second cyclones (170). Here, the outer side of the second cyclone (170) refers to the discharge hole (182) of the flow base part (181) that is connected to the discharge port (1741) of the second cyclone (170).

[0426] The second flow guide unit (187) is configured to radially separate the second cyclone (170a) of the first row and the second cyclone (170b) of the second row. The second cyclone (170a) of the first row may be arranged on the inner side of the second flow guide unit (187). The second cyclone (170b) of the second row may be arranged on the outer side of the second flow guide unit (187).

[0427] A second flow path (1871) may be formed inside the second flow guide part (187). The second flow guide part (187) may be divided into N equal parts by the first flow guide part (184). Through this, air passing through the first flow guide part (184) may move in the circumferential direction along the second flow path (1871) of the second flow guide part (187).

[0428] In addition, the flow guide unit (183) can divide the number of second cyclones (170) of multiple rows into N equal parts, and supply uniformly to the second cyclones (170b) of the first or second rows located inside each divided group.

[0429] In this embodiment, the flow guide unit (183) can divide 30 of the second cyclones (170) of multiple rows into 6 equal parts and supply 5 cyclones per group evenly to the second cyclones (170) of multiple rows.

[0430] Among the five divided second cyclones (170), the number of second cyclones (170) arranged in the first row is 1, the number of second cyclones (170) arranged in the second row is 2, and the number of second cyclones (170) arranged in the third row is 2.

[0431] The first flow guide portion (184) includes a first side wall (185), a second side wall (186), and a first connecting wall (1865). The first side wall (185) and the second side wall (186) may be formed to protrude upward from the second surface of the flow base portion (181).

[0432] The first side wall (185) and the second side wall (186) may be spaced apart from each other at a predetermined interval in the circumferential direction of the euro base portion (181). The first side wall (185) and the second side wall (186) may each extend in the radial direction. The interval between the first side wall (185) and the second side wall (186) may vary along the radial direction.

[0433] A first flow path (1842) may be formed between the inner surface of the first side wall (185) and the inner surface of the second side wall (186). The first side wall (185) and the second side wall (186) may be arranged between two adjacent discharge holes (182) along the circumference or the corner of a regular hexagon.

[0434] The outer surface of the first side wall (185) and the outer surface of the second side wall (186) can prevent the flow of air discharged through the two adjacent discharge holes (182) from interfering with each other. In addition, the first side wall (185) and the second side wall (186) can guide the flow of discharged air upward toward the flow path extension portion (190).

[0435] The first side wall (185) may be arranged adjacent to one of the two discharge holes (182), and the second side wall (186) may be arranged adjacent to the other of the two discharge holes (182).

[0436] Through this, the gap between the first side wall (185) and the second side wall (186) can be spaced as far apart as possible, thereby ensuring the width of the first flow path (1842) as wide as possible.

[0437] At least a portion of the first side wall (185) is formed to surround a portion of the discharge hole (182).

[0438] Referring to Fig. 20, a plurality of discharge holes (182) may be arranged in a plurality of rows along the radial direction of the flow base portion (181). The plurality of discharge holes (182) may be divided into six equal parts by the flow guide portion (183). The plurality of discharge holes (182) may be configured as discharge holes (182) in rows 1 to M from the radial inner side of the flow base portion (181) toward the outer side.

[0439] The first row may be provided with 6 discharge holes (182), the second row with 12 discharge holes (182), and the third row with 12 discharge holes (182). The centers of the first row discharge holes (182) may be arranged one at each vertex of the first regular hexagon (171a). The centers of the second row discharge holes (182) may be arranged at each vertex and each side center of the second regular hexagon (171b). The centers of the third row discharge holes (182) may be arranged two at each side of the third regular hexagon (171c). Here, each vertex of the first regular hexagon (171a) to the third regular hexagon (171c) is located on a center line that passes radially through the center of the flow path base portion (181).

[0440] The first side wall (185) may include a first straight portion (1851) and a first curved portion (1852). The first straight portion (1851) is positioned adjacent to the inlet (1841) of the first flow path (1842). The first straight portion (1851) may extend radially from the outer end of the first side wall (185) toward the discharge holes (182) of the second row.

[0441] One end of the first curved portion (1852) is connected to the inner end of the first straight portion (1851). The first curved portion (1852) is formed in an arc shape to surround a portion of the discharge hole (182) of the second row. The other end of the first curved portion (1852) is connected to one side of the second flow guide portion (187).

[0442] The second side wall (186) may include a second straight portion and a second curved portion. The second straight portion may be composed of a second outer straight portion (1861) and a second inner straight portion (1862). The second curved portion may be composed of a second outer curved portion (1863) and a second inner curved portion (1864).

[0443] The second outer straight portion (1861) may be arranged to face the first straight portion (1851) in the circumferential direction and be spaced apart from it. The second inner straight portion (1862) may be arranged to face the second curved portion in the circumferential direction and be spaced apart from it. The second outer straight portion (1861) and the second inner straight portion (1862) may be arranged to be spaced apart from it in the radial direction.

[0444] The second outer curved portion (1863) and the second inner curved portion (1864) may be arranged continuously along the radial direction of the euro base portion (181). The second outer curved portion (1863) may be connected to the second outer straight portion (1861). The second inner curved portion (1864) may be connected to the second inner straight portion (1862).

[0445] The second outer curved portion (1863) and the second inner curved portion (1864) may have curvatures in opposite directions. An inflection point may be formed at the point where the second outer curved portion (1863) and the second inner curved portion (1864) connect.

[0446] Through this, the first straight portion (1851) and the first curved portion (1852) can extend across between the discharge holes (182) of the third row and the discharge holes (182) of the second row, which are radially adjacent. The second outer straight portion (1861) and the second outer curved portion (1863) can extend across between the discharge holes (182) of the third row and the discharge holes (182) of the second row, which are radially adjacent. The second inner curved portion (1864) and the second inner straight portion (1862) can extend across between the discharge holes (182) of the second row, which are circumferentially adjacent (more precisely, in the line segment direction of the second regular hexagon (171b)).

[0447] The first connecting wall (1865) can extend radially. The first connecting wall (1865) can extend circumferentially. The first connecting wall (1865) is configured to connect one end of the first side wall (185) and the second side wall (186). Here, the one end of the first side wall (185) and the second side wall (186) means the upper end of the first side wall (185) and the second side wall (186) based on the direction in which they protrude from the second surface of the flow path base portion (181).

[0448] The inner surface of the first connecting wall (1865) can form a first flow path (1842) together with the inner surfaces of the first side wall (185) and the second side wall (186).

[0449] The first euro (1842) can be connected to a plurality of inlets (1731) formed between the inner surface of the first casing (1721) of the second cyclone (170) and the outer surface of the vortex finder (174).

[0450] Through this, the first flow guide unit (184) can not only guide the air flowing along the first flow path (1842) to the inlet (1731) of the second cyclone (170b) of the third row and the second row, but also deliver the air to the second flow path (1871) of the second flow guide unit (187).

[0451] In addition, the first flow guide part (184) can prevent the air passing through the mesh net (161) from moving from the flow inlet (1841) along the first flow path (1842) toward the second flow guide part (187) and from mixing with or interfering with the air discharged through the discharge hole (182).

[0452] The second flow guide portion (187) may include an arc portion (1881, 1891), an extension portion (1882, 1892), and a second connecting wall (1893). The arc portion (1881, 1891) may be formed to be curved in an arc shape along the circumference of the discharge hole (182). The arc portion (1881, 1891) is formed to surround the discharge hole (182).

[0453] The first circular arc portion (1881) and the second circular arc portion (1891) may have opposite curvature directions. For example, the first circular arc portion (1881) may be formed in a radially outwardly convex circular arc shape. The second circular arc portion (1891) may be formed in a radially inwardly convex circular arc shape.

[0454] The circular portion (1881, 1891) may be composed of a plurality of first circular portions (1881) and a plurality of second circular portions (1891). The first circular portion (1881) may form a part of the inner wall of the second flow guide portion (187). The first circular portion (1881) is formed to surround a part of the discharge hole (182) of the first row.

[0455] The second circular portion (1891) may form a part of the outer wall of the second flow guide portion (187). The second circular portion (1891) is formed to surround the discharge hole (182) of the second row.

[0456] The extension portions (1882, 1892) may be connected to the circular portions (1881, 1891) or the first curved portion (1852) of the first side wall (185). The extension portions (1882, 1892) may be composed of a plurality of first extension portions (1882) and a plurality of second extension portions (1892). The first extension portion (1882) may be formed to be convex toward the radially inward direction.

[0457] A plurality of first circular arc portions (1881) and a plurality of first extension portions (1882) are arranged alternately along the circumferential direction. The first extension portion (1882) can connect two adjacent first circular arc portions (1881) along the circumferential direction or along the line segment direction of a regular hexagon.

[0458] Through this, the first circular portion (1881) and the first extension portion (1882) can form the inner wall of the second flow guide portion (187). The first circular portion (1881) and the first extension portion (1882) surround the vortex finder (174) of the second cyclone (170a) of the first row and are arranged adjacent to the inlet (1731) of the second cyclone (170), so that air can be smoothly supplied to the inlet (1731) of the second cyclone (170).

[0459] The second extension portion (1892) may be formed to be convex toward the radially outer side. The second extension portion (1892) is configured to connect the second circular portion (1891) and one side of the first curved portion (1852) of the first side wall (185).

[0460] The curvature direction of the first circular portion (1881) may be the same as the curvature direction of the second extension portion (1892). The curvature direction of the second circular portion (1891) may be the same as the curvature direction of the first extension portion (1882). The curvature directions of the second circular portion (1891) and the second extension portion (1892) may be opposite to each other.

[0461] Through this, the second circular portion (1891) and the second extension portion (1892) can form the outer wall of the second flow guide portion (187). The second circular portion (1891) and the second extension portion (1892) surround the vortex finder (174) of the second cyclone (170a) of the first row and are arranged adjacent to the inlet (1731) of the second cyclone (170), so that air can be smoothly supplied to the inlet (1731) of the second cyclone (170).

[0462] The second connecting wall (1893) can be extended in the radial direction. The second connecting wall (1893) can be extended in the circumferential direction. The second connecting wall (1893) is configured to connect one end of each of the first circular portion (1881), the first extension portion (1882), the second circular portion (1891), and the second extension portion (1892). Here, one end of the first circular portion (1881), the first extension portion (1882), the second circular portion (1891), and the second extension portion (1892) means the upper end of the first side wall (185) and the second side wall (186) based on the direction protruding from the second surface of the flow base portion (181).

[0463] The inner surface of the second connecting wall (1893) can form a second flow path (1871) together with the inner surfaces of the first circular portion (1881), the first extension portion (1882), the second circular portion (1891), and the second extension portion (1892).

[0464] The second euro (1871) can be connected to a plurality of inlets (1731) formed between the inner surface of the first casing (1721) of the second cyclone (170b) of the first and second rows and the outer surface of the vortex finder (174).

[0465] Through this, the second flow guide unit (187) can transfer the air flowing along the second flow path (1871) to the inlet (1731) of the second cyclone (170b) of the first and second rows.

[0466] In addition, the second flow guide unit (187) can prevent the air moving along the second flow path (1871) and the air discharged through the discharge hole (182) from mixing or interfering with each other.

[0467] The second flow guide part (187) may include a second outer flow guide part and a second inner flow guide part.

[0468] The second outer flow guide portion can connect the first side wall (185) of one of the two circumferentially adjacent first flow guide portions (184) and the second side wall (186) of the other of the two first flow guide portions (184). The first circular portion (1881) and the first extension portion (1882) can form the second outer flow guide portion.

[0469] The second inner flow guide portion may be spaced apart from the second outer flow guide portion in the radial direction and may extend circumferentially to surround the second cyclone (170a) of the first row. The second circular portion (1891) and the second extension portion (1892) may form the second inner flow guide portion.

[0470] The fan motor (130) may be placed on one side of the filter unit (120). The rotational axis (132) of the fan motor (130) may extend in a direction orthogonal (vertical) to the longitudinal direction (up-down direction) of the second cyclone (170) or the filter unit (120). The impeller (133) may be coupled to one end of the rotational axis (132) and rotated.

[0471] In this embodiment, the direction of flow of air discharged from the second cyclone (170) and moving to the filter unit (120) is vertical. The direction of flow of air sucked by the impeller (133) in the filter unit (120) is orthogonal to the vertical direction.

[0472] Due to this, when the vertical path length between the filter unit (120) and the second cyclone (170) is too short, the second cyclone (170) among the multiple rows of second cyclones (170) that is axially close to the fan motor (130) (impeller (133)) is subject to a strong suction force of the impeller (133).

[0473] However, among the second cyclones (170) of the multiple rows, the second cyclone (170) that is positioned axially far from the fan motor (130) (impeller (133)) has a weak suction force of the impeller (133).

[0474] That is, the farther the second cyclone (170) of the multiple rows is positioned in the axial direction from the fan motor (130), the weaker the suction force of the impeller (133), so there is a problem that the suction force of the air passing through the second cyclone (170) becomes uneven depending on the axial distance between the fan motor (130) and the second cyclone (170).

[0475] To solve this problem, the upper euro housing (180) may include a euro extension part (190).

[0476] The extension portion (190) may be formed on the inside of the upper housing (180). The upper housing (180) may form the extension portion (190). The extension portion (190) may extend in the vertical direction. The extension portion (190) may be formed in a cylindrical shape.

[0477] The lower part of the euro extension (190) is connected to the discharge port (1741) of the second cyclone (170). The upper part of the euro extension (190) can be connected to the inner part of the filter.

[0478] The air flow path (190) can extend the air flow path length moving from the second cyclone (170) to the filter unit (120) in the vertical direction. For example, the length of the air flow path (190) is preferably 20 mm to 50 mm.

[0479] This is because, when the length of the euro extension (190) is less than 20 mm, the problem of uneven air suction power occurs depending on the axial distance between the second cyclone (170) and the fan motor (130). In addition, when the length of the euro extension (190) exceeds 50 mm, the size of the vacuum cleaner becomes unnecessarily large, which reduces portability.

[0480] As described above, the number of second cyclones (170a) in the first row is six. The first casings (1721) of the six second cyclones (170) arranged with their centers at each vertex of the first regular hexagon (171a) are arranged so as to be external to each other. The outer surfaces of the six first casings (1721) are arranged to face each other in the radial direction.

[0481] The space between the outer surfaces of the first casings (1721) facing each other in the radial direction is located at the center of the first regular hexagon (171a) and can form an empty space.

[0482] However, the air moving radially inward along the first flow path (1842) of the plurality of first guide sections may be radially interfered with by the flow in the central portion of the plurality of rows of second cyclones (170), i.e., the inner space surrounded by the six first row of second cyclones (170a).

[0483] To solve this problem, the upper flow path housing (180) may include a flow interference prevention part (191). The flow interference prevention part (191) may be formed to protrude downward from the center of the first surface of the flow path base part (181).

[0484] The flow interference prevention part (191) can be formed in an approximately polygonal shape. In the present embodiment, the flow interference prevention part (191) can be formed in a hexagonal shape.

[0485] The flow interference prevention unit (191) may include a plurality of curved portions (1911) and a closing portion (1912). The number of curved portions (1911) may correspond to the number of groups into which the second cyclone (170) of multiple rows is divided. In the present embodiment, six curved portions (1911) may be provided.

[0486] The curved portion (1911) may be arranged on a line segment forming a hexagon of the flow interference prevention portion (191). The curved portion (1911) may be formed concavely radially inward with respect to the line segment.

[0487] The curvature and curvature direction of the curved portion (1911) can be formed to correspond to the curvature and curvature direction of the outer surface of the first casing (1721) of the second cyclone (170a) of the first row.

[0488] The curved portion (1911) may be arranged on the upper portion of the first casing (1721) of the second cyclone (170a) of the first row. The curved portion (1911) may be arranged to face the vortex finder (174) of the second cyclone (170a) of the first row and to be spaced apart from each other in the radial direction.

[0489] The radial spacing between the vortex finder (174) and the curved portion (1911) may be the same as the radial spacing between the vortex finder (174) of the second cyclone (170a) of the first row and the first casing (1721).

[0490] The curved portion (1911) and the first casing (1721) of the second cyclone (170) may form the same curve in the vertical direction. The curved portion (1911) may be formed to surround a portion of the vortex finder (174) of the second cyclone (170).

[0491] The plurality of curved sections (1911) can be arranged to face each other in one-to-one correspondence with the plurality of second cyclones (170a) of the first row.

[0492] A portion of the air that has passed through the second cyclone (170a) of the first row in the second flow guide section (187) is reflected directly downward by the curved section (1911), so that the air flow direction is changed from the radial direction to the downward direction, and thus can be introduced into the inlet (1731) of the second cyclone (170a) of the first row.

[0493] Additionally, the curved portion (1911) can prevent the flow of air moving radially inward toward the center of the euro base portion (181) along the plurality of first euros (1842) from interfering with each other.

[0494] An opening (1611) may be formed at the bottom of the curved portion (1911). The closing portion (1912) is formed to cover the opening (1611) at the bottom of the curved portion (1911).

[0495] A boss portion (192) may be formed to protrude downward from the lower surface of the closing portion (1912). The boss portion (192) may be formed in a cylindrical shape. A fastening groove (1921) may be formed inside the boss portion (192).

[0496] A plurality of reinforcing ribs (193) may be formed to protrude downward between the lower surface of the finishing portion (1912) and the outer surface of the boss portion (192). The plurality of reinforcing ribs (193) may be arranged to be spaced apart from each other in the circumferential direction along the outer surface of the boss portion (192).

[0497] A radial extension (1941, 1942) is provided on the outer surface of the second cyclone (170a) of the first row. The radial extension (1941, 1942) may include a first radial extension (1941) and a second radial extension (1942).

[0498] The first radial extension (1941) may extend radially from the outer surface of the upper inlet (175) of the second cyclone (170). The second radial extension (1942) may extend radially from the outer surface of the first casing (1721) of the second cyclone (170).

[0499] The first radial extension (1941) and the second radial extension (1942) may be arranged to overlap each other in the vertical direction. A first fastening hole (1951) may be formed to penetrate vertically in the first radial extension (1941). A second fastening hole (1952) may be formed to penetrate vertically in the second radial extension (1942).

[0500] The fastening groove (1921) and the first fastening hole (1951) and the second fastening hole (1952) can be arranged to overlap each other in the vertical direction. The fastening member (1801) such as a screw is fastened by passing through the second fastening hole (1952), the first fastening hole (1951) and the fastening groove (1921) in that order, so that the central portion of the euro base portion (181) and the central portion of the second cyclones (170) in multiple rows can be firmly fastened.

[0501] The upper euro housing (180) may further include a plurality of casing coupling portions (196). The casing coupling portions (196) may be formed to protrude downward from the first surface of the euro base portion (181) toward the outer surface of the first casing (1721) of the second cyclone (170c) in the third row.

[0502] The casing coupling portion (196) may be provided in N numbers corresponding to the number of division groups of the second cyclone (170) of multiple rows. In this embodiment, the number of casing coupling portions (196) is shown as six.

[0503] The casing joint (196) is formed to surround the outer surface of the first casing (1721) of one of the second cyclones (170c) of the third row. A hook joint hole (1961) may be formed to penetrate radially through the casing joint (196).

[0504] A fastening hook (1962) may be formed to protrude radially outward toward the hook coupling hole (1961) on the outer surface of the first casing (1721). The fastening hook (1962) of the first casing (1721) may be inserted and coupled into the hook coupling hole (1961) of the casing coupling portion (196).

[0505] Through this, the casing joint (196) can be connected to the outer surface of the upper euro housing (180) and the outer surface of the first casing (1721) of the second cyclone (170c) of the third row.

[0506] The casing joint (196) can reinforce the rigidity of the flow base portion (181) separated by the flow guide portion (183). The casing joint (196) can be connected to one of the second cyclones (170c) of the third row divided into six groups, thereby restricting the movement of the second cyclones (170) of multiple rows in the vertical direction.

[0507] Therefore, according to the present invention, a plurality of second cyclones (170) can be arranged in multiple rows along the radial direction inside the first cyclone (160). The multiple rows of second cyclones (170) can be arranged in a circumferential direction or along the line segment direction of a polygon.

[0508] Through this, a plurality of second cyclones (170) are densely arranged inside the first cyclone (160), thereby not only securing an additional number of second cyclones (170), but also improving the separation performance of the cleaner.

[0509] Additionally, an upper flow housing (180) is mounted on the upper portion of the second cyclone (170). The upper flow housing (180) may include a flow base portion (181) and a flow guide portion (183). The flow base portion (181) has a plurality of discharge holes (182).

[0510] A plurality of discharge holes (182) are formed to communicate with the discharge port (1741) of the vortex finder (174) of the second cyclone (170). The plurality of second cyclones (170) can be evenly divided into N groups along the circumferential direction.

[0511] The flow guide portion (183) is formed to protrude upward from the euro base portion (181). The flow guide portion (183) includes a plurality of first flow guide portions (184) and second flow guide portions (187).

[0512] The first flow guide portion (184) extends in the radial direction of the euro base portion (181). A plurality of first flow guide portions (184) are provided in N numbers, and can be arranged at equal intervals between two adjacent groups of second cyclones (170) along the circumferential direction.

[0513] The first flow guide part (184) forms a first flow path (1842). A flow path inlet (1841) is formed at the outer end of the first flow guide part (184). The flow path inlet (1841) is a passage for introducing air that has passed through the mesh (161) of the first cyclone (160).

[0514] The second flow guide part (187) extends in the circumferential direction in a closed loop shape. A second flow path (1871) is formed inside the second flow guide part (187). The second flow guide part (187) is configured to connect the inner ends of a plurality of first flow guide parts (184) so ​​as to be communicably connected.

[0515] For example, a total of 30 second cyclones (170) may include second cyclones (170c) in rows 1 to 3 from the radially inner to the outer. The 30 second cyclones (170) may be divided into 6 groups, and each group may include 5 second cyclones (170). Each group may include a total of 5 second cyclones (170), including one in the first row, two in the second row, and two in the third row.

[0516] For each group, two second cyclones (170b) in the second row and two second cyclones (170c) in the third row can be divided between two first flow guide parts (184) adjacent to each other in the circumferential direction. One second cyclone (170a) in the first row can be divided inside the second flow guide part (187).

[0517] According to this configuration, air passing through the mesh (161) of the first cyclone (160) flows into the first flow path (1842) of the first flow guide part (184) through the flow path inlet (1841). The first flow path (1842) is positioned higher than the vortex finder (174) of the second cyclone (170), so that the air of the first flow path (1842) can move from the outermost side to the innermost side of the first flow guide part (184) in the radial direction without flow interference with the vortex finder (174) of the second cyclone (170c) of the third row.

[0518] In addition, the second flow guide part (187) communicating with the inner end of the first flow guide part (184) is arranged to surround the second cyclone (170a) of the first row. The second flow guide part (187) can directly receive air from the first flow guide part (184) and evenly distribute it to the inlets (1731) of the six second cyclones (170a) of the first row.

[0519] The first flow guide part (184) may be formed in a curved shape to cross between two discharge holes (182) adjacent in the circumferential or radial direction, and one side of the first side wall (185) of the first flow guide part (184) may surround one of the two discharge holes (182), and one side of the second side wall (186) of the first flow guide part (184) may surround the other of the two discharge holes (182).

[0520] The second flow guide part (187) may be formed in a curved shape to cross between two discharge holes (182) adjacent in the circumferential or radial direction, and one side of the first circular arc part (1881) of the second flow guide part (187) may surround one of the two discharge holes (182), and one side of the second circular arc part (1891) of the second flow guide part (187) may surround the discharge holes (182) of the first row.

[0521] Through this, the first flow guide unit (184) is positioned closest to the inlet (1731) of the second cyclone (170) of each group divided into N groups, so that not only can the amount of air flowing be distributed evenly to each group, but also can be distributed evenly to a plurality of second cyclones (170) within each group.

[0522] Therefore, in the second cyclone (170) of the multiple rows, the flow guide part (183) can evenly distribute the air flow not only to the second cyclone (170c) of the third row arranged close to the flow inlet (1841), but also to the second cyclone (170a) of the first row arranged far from the flow inlet (1841).

[0523] Additionally, the flow guide part (183) can be formed on the upper part of the cyclone without providing a separate flow path space between the cyclones arranged externally.

[0524] In addition, the first flow guide unit (184) can supply smooth flow to the second cyclones (170) of each group without flow interference between the plurality of second cyclones (170) divided into N groups.

[0525] In addition, the fluid guide unit (183) can increase the separation performance of the cleaner by supplying uniform fluid to each group.

[0526] Furthermore, a pre-filter (121) and a HEPA filter (122) may be placed on the upper portion of the upper filtration housing (180). The pre-filter (121) and the HEPA filter (122) can supply a uniform air flow to each cyclone by stagnating the air flow.

[0527] In addition, the upper flow path housing (180) can be extended upwardly from the flow path base portion (181). A flow path extension portion (190) can be formed inside the upper flow path housing (180). The flow path extension portion (190) can extend the flow path of air discharged from the second cyclone (170).

[0528] Through this, the euro extension (190) can equally apply the air suction force to the plurality of second cyclones (170) regardless of the distance (or position) of the plurality of second cyclones (170) spaced axially from the fan motor (130).

Claims

1. Housing; A suction duct housing coupled to the inside of the above housing and having a suction port formed on one side of the outer surface; A first cyclone disposed inside the housing and separating dust from air sucked in through the suction port; A plurality of second cyclones arranged inside the first cyclone and separating fine dust from air passing through the first cyclone; and It includes an upper flow path housing provided inside the above suction flow path housing and positioned above the first cyclone and the second cyclone, The above plurality of second cyclones are arranged in multiple rows along the radial direction of the first cyclone, The above upper euro housing is, A euro base portion mounted on the upper end of the plurality of second cyclones and having a plurality of discharge holes to discharge air that has passed through the plurality of second cyclones; and A dust collecting device including a flow guide part formed to protrude in the opposite direction to the second cyclone from the above-mentioned flow base part, having a flow path that is open toward the second cyclone and extends along the radial direction, and moves air that has passed through the first cyclone along the flow path and distributes it to each of the plurality of rows of second cyclones.

2. In paragraph 1, The second cyclones of the above multiple rows are arranged in the first to Mth rows from the inner side in the radial direction, and are divided into N equal parts along the circumferential direction of the first cyclone and divided into N groups. The above fluid guide part, A plurality of first flow guide parts arranged between two groups of second cyclones adjacent in the circumferential direction and extending along the radial direction; and A dust collecting device including a second flow guide part that is connected in communication with the inner end of the plurality of first flow guide parts and extends in the circumferential direction to surround the second cyclone of the first row among the plurality of rows of second cyclones.

3. In paragraph 2, The above first flow guide part, A first side wall extending in the radial direction and surrounding one side of a second cyclone of one of the two groups adjacent in the circumferential direction; A second side wall spaced apart from the first side wall in the circumferential direction and extending in the radial direction, and surrounding one side of the second cyclone of the other group of the two groups; and A dust collecting device including a first connecting wall connecting one end of the first side wall and one end of the second side wall in the protruding direction of the fluid guide portion.

4. In paragraph 3, The above first side wall, A first straight line extending toward one side of a second cyclone of one of the two groups above; A first curved portion is formed in a curved shape having the same curvature as the first outer surface to surround the first outer surface of one of the second cyclones of the group at the inner end of the first straight portion, The above second side wall, A second straight section extending toward one side of the second cyclone of the other of the two groups; A dust collector including a second curved section formed in a curved shape having the same curvature as the second outer surface so as to surround the second outer surface of one of the second cyclones of the other group at the inner end of the second straight section.

5. In paragraph 3, The above second flow guide part, A second outer flow guide part connecting the first side wall of one of the two first flow guide parts adjacent in the circumferential direction and the second side wall of the other of the two first flow guide parts; and A dust collecting device including a second inner flow guide portion that is spaced apart radially from the second outer flow guide portion and extends circumferentially to surround the second cyclone of the first row.

6. In paragraph 5, The second outer flow guide section is A plurality of first circular arc portions formed in an arc shape to surround the outer surface of the second cyclone of the first row and arranged spaced apart from each other in the circumferential direction; and Including a first extension portion connecting two first circular arc portions adjacent to each other in the above circumferential direction, The above second inner flow guide part, A second circular arc portion formed in an arc shape to surround the outer surface of the second cyclone of the second row radially adjacent to the second cyclone of the first row, and connected to the inner end of the second side wall; and A dust collector including a second extension connecting the second circular portion and the first side wall.

7. In paragraph 1, The above upper euro housing extends in the opposite direction to the first cyclone from the outer periphery of the euro base portion, A dust collector further comprising a flow path extension part for extending the flow path length of air discharged through the discharge hole inside the upper flow path housing.

8. In paragraph 1, The above first cyclone is, A mesh net that is formed in a cylindrical shape to communicate with the above suction port and surround the plurality of second cyclones, and separates dust from the air; An outer case coupled to one side of the above mesh network; and A dust collector including an inner case arranged inside the outer case.

9. In paragraph 8, A dust collector in which a mounting guide is formed to protrude from the outer surface of the upper housing to wrap around the other side of the mesh net.

10. In paragraph 8, The above second cyclone, A casing disposed inside the mesh net, formed into a cylindrical shape with a diameter smaller than the mesh net, and extending in the longitudinal direction of the mesh net; An inlet formed at one end of the casing to allow air passing through the mesh to flow in; A fine dust discharge port formed at the other end of the casing to discharge fine dust separated from the air of the casing; A vortex finder disposed inside the casing, protruding from one end of the casing toward the discharge hole and connected to the discharge hole to discharge air from which the fine dust is separated; and A dust collector including a plurality of guide vanes that protrude radially between the inner surface of the casing and the outer surface of the vortex finder and are formed to be inclined so as to induce the flow of air introduced through the inlet into a rotational motion.

11. In paragraph 10, A dust collecting device in which the above flow guide part is opened in the longitudinal direction of the casing to face the inlet port and transmits air flowing along the flow path to the inlet port.

12. In paragraph 10, The above Eurobase part is, A first surface arranged toward the second cyclone; and A second surface is disposed opposite to the first surface, and the thickness of the euro base portion is formed between the first surface and the second surface. The above Eurobase part is, A dust collecting device further comprising a discharge port coupling portion that is connected to one end of the vortex finder and is formed to be sunken from the second surface toward the first surface along the periphery of the discharge hole.

13. In paragraph 2, The above upper euro housing is, A dust collecting device further comprising a flow interference prevention part that is formed to protrude from the center of the euro base part into the space between the second cyclones of the first row and has a plurality of curved parts having a curvature corresponding to the outer surface of the second cyclones of the first row, thereby preventing interference with the flow of air moving in the radial direction along the flow guide part.

14. In paragraph 1, It further includes a filter unit that is provided inside the above suction housing and is positioned downstream of the upper housing based on the direction of air flow, and separates fine dust from the air discharged from the second cyclone. The above filter part, Prefilter; and A dust collector including a HEPA filter surrounding the above pre-filter.

15. In paragraph 14, The above suction duct housing is, An inner wall portion provided inside the above suction duct housing; A partition wall extending radially from the inner surface of the suction passage housing toward the outer surface of the inner wall portion, and dividing a first annular space formed between the suction passage housing and the filter portion and a second annular space between the suction passage housing and the inner wall portion; and It includes a suction guide formed to be inclined toward the first cyclone from the upper flow housing along the second annular space, and to induce the flow of air sucked through the suction port to rotate. The above upper euro housing is a dust collecting device that is attached to the inner wall.

16. In paragraph 10, The above upper euro housing is, It further includes a plurality of casing coupling parts formed to protrude from the euro base portion toward the outer surface of the casing, and has a hook coupling hole. A dust collector in which a fastening hook is formed to protrude from the outer surface of the above casing and is inserted and connected into the hook coupling hole.

17. In paragraph 2, The number of the above second cyclones is 30 in total, and the second cyclones of the multiple rows are composed of the second cyclones of the first to third rows, and are divided into six equal parts and divided into six groups. A dust collecting device in which the above plurality of second cyclones are arranged externally to each other.

18. A suction unit that sucks air from the cleaning target area; A dust collector that separates dust from air sucked through the suction unit; and A fan motor is disposed downstream of the dust collector based on the direction of air flow, and sucks the air into the dust collector. The above dust collector, A housing extending in one direction; A first cyclone disposed inside the housing and separating dust from air sucked in through the suction unit; A plurality of second cyclones arranged inside the first cyclone and separating fine dust from air passing through the first cyclone; and It includes an upper flow housing provided inside the housing and positioned above the first cyclone and the second cyclone, The above plurality of second cyclones are arranged in multiple rows along the radial direction of the first cyclone, The above upper euro housing is, A euro base portion mounted on the upper end of the plurality of second cyclones and having a plurality of discharge holes to discharge air that has passed through the plurality of second cyclones; and A cleaner including a flow guide part formed to protrude in the opposite direction from the second cyclone from the above-mentioned flow base part, having a flow path that is open toward the second cyclone and extends along the radial direction, and moves air that has passed through the first cyclone along the flow path and distributes it to each of the plurality of rows of second cyclones.

19. In paragraph 18, The above fan motor, An impeller that creates a flow of air; A rotating shaft to which the above impeller is connected at one end; It includes a drive motor that provides rotational force to the impeller through the rotational shaft, and has a rotor coupled to the rotational shaft and a stator surrounding the rotor. The above second cyclone is extended in one direction, A cleaner in which the axial direction of the above-mentioned rotational axis and the longitudinal direction of the above-mentioned second cyclone are arranged perpendicular to each other.

20. In paragraph 18, It includes a filter unit arranged between the downstream side of the upper flow housing and the upstream side of the fan motor based on the direction of the air flow. A cleaner in which the upper euro housing has a euro extension part inside that extends in one direction from the euro base part toward the filter part and extends the air path discharged through the discharge hole to a preset length.

21. In paragraph 20, A fan motor receiving portion extending in a vertical direction in the opposite direction of the suction portion from one side of the housing; A battery that supplies power to the above fan motor; A battery receiving portion extending in a vertical direction opposite to the suction portion on the other side of the housing; and A vacuum cleaner further comprising a handle portion formed to be inclined at a preset angle with respect to the one direction between the fan motor receiving portion and the battery receiving portion, and connected to the fan motor receiving portion and the battery receiving portion.

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