KR20140119660A - Cleaner - Google Patents

Abstract

A cleaner having an improved structure to improve the cleaning performance is disclosed. According to an embodiment of the present invention, the cleaner includes an absorbing unit which generates absorbing force to absorb air into a body thereof. The absorbing unit includes a rotary impeller, an impeller cover having an absorbing aperture, and a return channel which is combined to the impeller cover to accommodate the impeller therein and has an outlet. A plurality of wings can be provided in the return channel to form a slope against an axial direction of the return channel.

Description

Cleaner {CLEANER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner having an improved structure for improving cleaning performance.

Generally, a vacuum cleaner sucks air containing dirt on a surface to be cleaned, separates and collects dirt from the air, and discharges the purified air to the outside of the main body.

Such a cleaner is divided into a canister type in which the main body and the suction nozzle are separated from each other by a predetermined pipe, and an up-right type in which the suction nozzle and the main body are provided in one.

In recent years, a robot cleaner has been spotlighted for automatically cleaning an area to be cleaned by suctioning foreign substances such as dust from the floor surface while traveling the area to be cleaned without user's operation.

The cleaner is a component that determines the suction force and may include an impeller, a diffuser, and a deswirler.

The air sucked into the main body flows through the impeller, the diffuser, and the superfluidizer in turn along the bent flow path several times. In this process, the pressure loss of the air increases, and the spacing between the impeller and the diffuser is designed to be narrow to compensate for the reduction of the suction force due to the pressure loss. However, as the gap between the impeller and the diffuser is narrowed, noise due to pressure perturbation may occur. In order to prevent noise, the size of the motor coupled to the impeller and the impeller can be increased, but the size of the cleaner is also increased, so that it does not meet the recent market trend requiring a compact product.

One aspect of the present invention provides a vacuum cleaner having an improved structure for improving a suction force.

Another aspect of the present invention provides a vacuum cleaner having an improved structure capable of miniaturization and compacting.

Another aspect of the present invention provides a vacuum cleaner having an improved structure to prevent noise.

The vacuum cleaner according to the present invention includes a suction unit for generating a suction force for sucking air into the main body. The suction unit includes a rotatable impeller, an impeller cover having an inlet port, And a return channel coupled to the impeller cover to receive the impeller and having a discharge port, wherein the return channel is provided with a plurality of blades arranged to form a slope with respect to an axial direction (X) of the return channel .

And the plurality of blades have curved surfaces.

The impeller rotates in a first direction (H) and the plurality of blades are inclined in a second direction (I) opposite to the first direction (H) with respect to the axial direction (X) Can be formed.

The return channel includes an inner frame and an impeller cover. The outer frame forms an impeller accommodation space for receiving the impeller. An outer frame located outside the inner frame is spaced apart from the inner frame. .

And the plurality of blades are disposed between the inner frame and the outer frame.

Wherein the plurality of blades are spaced apart from each other to form an exhaust passage through which the air having passed through the impeller moves, and air moving along the exhaust passage is exhausted to the outside of the intake unit through an exhaust port formed at one end of the exhaust passage Can be discharged.

The impeller cover includes a guide portion coupled to the outer frame to guide the air passing through the impeller to the discharge passage, and the guide portion may have a curved surface.

The guide portion may be convex toward the outside of the impeller cover, and may have a curved surface having a radius of curvature of 1 mm or more.

Wherein the plurality of blades include a first surface coupled to an outer surface of the inner frame and a second surface coupled to an inner surface of the outer frame, and one end of the second surface is connected to the impeller Can be further extended toward the cover.

The straight line A connecting the one end of the first face and the one end of the second face toward the impeller cover forms an inclination of not less than 5 degrees and not more than 85 degrees with respect to the axial direction X of the return channel .

On one end of the first surface facing the impeller cover and on the other end of the second surface facing the impeller cover on a cross section (Q) of the return channel cut in a horizontal direction (Y) perpendicular to the axial direction (X) The angle? Formed by the straight line B connecting the end portions with the straight line C connecting the center of the return channel and one end of the first surface facing the impeller cover is not less than 0 degrees and not more than 80 degrees. do.

The suction unit may further include a motor provided inside the return channel, having a motor shaft coupled with the impeller to provide a driving force for rotating the impeller.

The suction unit includes a rotatable impeller, a return channel disposed on the lower side of the impeller, and a return channel disposed on the lower side of the impeller, Wherein a plurality of blades are disposed along an outer circumferential surface of the return channel between the return channel and the cover, and the plurality of blades are disposed between the return channel and the cover in the axial direction X of the return channel, (I) which is the opposite direction to the first direction (H) in which the first rotating body (12) rotates.

Wherein the suction unit further includes a motor housing coupled to the cover to form a housing space for housing the impeller and the return channel and a motor for providing a driving force to rotate the impeller, An exhaust port may be formed in the housing.

The air sucked into the intake port and passed through the impeller moves into the motor housing along the discharge passage formed by the plurality of vanes and can be discharged to the outside of the suction unit through the exhaust port.

The plurality of vanes may form a convex curved surface toward the first direction (H) which is the same as the rotational direction of the impeller.

Wherein the plurality of vanes include a first surface coupled to an outer surface of the return channel and a second surface coupled to an inner surface of the cover, wherein one end of the second surface extends upwardly from one end of the first surface Can be further extended.

The straight line connecting the one end of the first surface and the one end of the second surface may form an inclination of not less than 5 ° and not more than 85 ° with respect to the axial direction of the return channel.

A straight line connecting one end of the first surface and one end of the second surface is cut on the end surface Q cut in the horizontal direction Y perpendicular to the axial direction X of the return channel, (B) between the center of the return channel and a straight line (C) connecting one end of the first face is 0 or more and 80 or less.

The bent shape of the flow path can be reduced by arranging a plurality of blades that form an inclination with respect to the axial direction X of the return channel in the return channel and thereby the pressure loss of the air can be reduced to improve the suction force of the vacuum cleaner .

By using a return channel that also serves as a diffuser, the gap between the return channel and the impeller can be increased above the gap between the existing diffuser and the impeller, thereby reducing the noise of the vacuum cleaner caused by pressure perturbations.

The suction force of the vacuum cleaner can be improved and the size of the vacuum cleaner can be reduced by using the return channel in which a plurality of vanes forming an inclination with respect to the axial direction X of the return channel are disposed.

1 is a view showing an appearance of a vacuum cleaner according to an embodiment of the present invention;
2 is a cross-sectional view illustrating the main body of the vacuum cleaner according to the embodiment of the present invention.
3 is a perspective view illustrating a suction unit of a vacuum cleaner according to an embodiment of the present invention.
4 is an exploded perspective view of the suction unit of the vacuum cleaner according to the embodiment of the present invention.
5 is an enlarged perspective view of a suction unit of a vacuum cleaner according to an embodiment of the present invention.
6 is a sectional view of the suction unit of the vacuum cleaner according to the embodiment of the present invention
7 is an enlarged cross-sectional view of a suction unit of a vacuum cleaner according to an embodiment of the present invention.
8 is a side view of the suction unit of the vacuum cleaner according to the embodiment of the present invention.
9 is a cross-sectional view of an enlarged portion of a plurality of wings which are inclined in the same direction as the rotation direction of the impeller, according to an embodiment of the present invention.
FIG. 10 is a cross-sectional view of a cleaner according to an embodiment of the present invention, in which a portion of a plurality of blades, which are inclined in a direction opposite to a rotating direction of the impeller,
11 is a cross-sectional view showing the main body of the vacuum cleaner according to another embodiment of the present invention
12 is a perspective view showing a suction unit of a vacuum cleaner according to another embodiment of the present invention.
13 is an exploded perspective view of the suction unit of the vacuum cleaner according to another embodiment of the present invention.
14 is an enlarged perspective view of a suction unit of a vacuum cleaner according to another embodiment of the present invention.
15 is a sectional view of the suction unit of the vacuum cleaner according to another embodiment of the present invention
16 is an enlarged cross-sectional view of a part of the suction unit of the vacuum cleaner according to another embodiment of the present invention
17 is an enlarged cross-sectional view of a portion of a plurality of wings of a vacuum cleaner according to another embodiment of the present invention
18 shows a relationship between the inclination of the return channel of the straight line A connecting the one end of the first surface and the one end of the second surface with respect to the axial direction X and the suction force of the vacuum cleaner according to the embodiment of the present invention Graph
19 is a cross-sectional view of a straight line connecting one end of the first surface and one end of the second surface (FIG. 19) on a cross section Q on which the return channel is cut in the horizontal direction Y perpendicular to the axial direction X of the return channel B, the angle formed by the straight line C connecting the center of the return channel and one end of the first surface, and the suction force of the vacuum cleaner according to an embodiment of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terms "tip", "rear end", "upper", "lower", "upper" and "lower", etc. used in the following description are defined with reference to the drawings, Is not limited.

1 is a view showing an appearance of a vacuum cleaner according to an embodiment of the present invention.

1, the vacuum cleaner 1 may include a suction unit 11 that sucks foreign matter by the suction force of air, and a main body 10 that collects foreign substances sucked by the suction unit 11 .

Between the main body 10 and the suction unit 11 is connected the connection hose 12 and the connection pipe 13 so that the suction force generated in the main body 10 can be transmitted to the suction unit 11, A handle 14 may be provided between the connection pipe 13 and the connection pipe 13 so that the user can grip the same.

The connecting hose 12 is formed of a flexible tube or the like and one end of the connecting hose 12 is connected to the main body 10 and the other end of the connecting hose 12 is connected to the handle 14, 11 can freely move around the main body 10 within a predetermined radius. The connection pipe 13 may be formed to have a predetermined length. One end of the connecting pipe 13 is connected to the suction unit 11 and the other end of the connecting pipe 13 is connected to the handle 14 so that the user can clean the foreign object on the floor while standing.

FIG. 2 is a cross-sectional view illustrating a main body of a vacuum cleaner according to an embodiment of the present invention, and FIG. 3 is a perspective view illustrating a suction unit of a vacuum cleaner according to an embodiment of the present invention. FIG. 4 is an exploded perspective view of a suction unit of a vacuum cleaner according to an embodiment of the present invention, and FIG. 5 is an enlarged perspective view of a suction unit of a vacuum cleaner according to an embodiment of the present invention. 6 is a sectional view of a suction unit of a vacuum cleaner according to an embodiment of the present invention.

2 to 6, a connecting hose 12 is connected to the front of the main body 10 and the air sucked by the suction unit 11 flows into the main body 10 along the connecting hose 12 Lt; / RTI > An exhaust unit 15 may be formed at a rear upper portion of the main body 10 so that the air filtered by the dust collecting apparatus 20 provided inside the main body 10 can be exhausted to the outside of the main body 10. [ The inside of the main body 10 is provided with a dust collecting chamber 10a in which a dust collecting apparatus 20 is installed, a suction chamber 10b in which a suction unit 100 and an exhaust passage 16 are provided, and a power cord (not shown) (Not shown).

A dust collecting device 20 for collecting dust sucked into the dust collecting chamber 10a through the connection hose 12 may be installed in the dust collecting chamber 10a. In the present embodiment, a cyclone device for separating foreign substances in the air sucked by the dust collecting device 20 by centrifugal force is used, but a dust container for collecting dust may also be used. In addition, the cover 21 can be hinged to the upper portion of the dust collecting chamber 10a so that the dust collecting apparatus 20 can be attached and detached.

The vacuum cleaner 1 may include a suction unit 100 for generating a suction force for sucking outside air into the main body 10. The suction unit 100 may be installed inside the suction chamber 10b.

The suction unit 100 may include an impeller 110, an impeller cover 120, and a return channel 130.

The impeller cover 120 may have an air inlet 121 formed therein. The suction port 121 is connected to the discharge port 22 of the dust collecting apparatus 20 by the connection pipe 17 to generate a suction force to the dust collecting apparatus 20.

The rotatable impeller 110 may be provided inside the impeller cover 120.

The impeller 110 may be a centrifugal fan that sucks air in the axial direction of the impeller 110 and discharges the air in a radial direction.

The impeller 110 may include a first plate 111, a second plate 112, and a plurality of rotating blades 113.

The first plate 111 and the second plate 112 may be arranged to face each other and a plurality of rotating blades 113 may be disposed between the first plate 111 and the second plate 112 have.

The upper surface of the plurality of rotary blades 113 is coupled to the first plate 111 located above the plurality of rotary blades 113 and the lower surface of the plurality of rotary blades 113 is coupled to a lower portion of the plurality of rotary blades 113 And the second plate 112 is positioned. Therefore, the first plate 111, the second plate 112, and the plurality of rotary vanes 113 can rotate integrally.

The first plate 111 may have an opening 114 corresponding to the inlet 121 of the impeller cover 120. The air that has passed through the inlet 121 can be introduced into the impeller 110 through the opening hole 114. [

One end of the motor shaft 141 is fixed to the second plate 112. Accordingly, the first plate 111, the second plate 112, and the plurality of rotary blades 113 can rotate integrally with the motor shaft 141 as a center.

A plurality of rotary blades 113 positioned between the first plate 111 and the second plate 112 may be formed to define a flow path 115 so as to be spaced apart from each other. The air that has passed through the opening hole 114 and flows into the impeller 110 moves along the flow path 115 and is transferred to the discharge path 161 formed in the return channel 130.

The impeller 110 may include a 3D impeller including a body and a blade having a shape that is gradually lowered in the radial direction.

The shape of the impeller 110 may be variously modified and is not limited to the above example.

The return channel 130 serves to convert the kinetic energy of the air sucked by the impeller 110 into pressure energy. The return channel 130 is connected to the impeller 110 through an impeller 110, (134) can be formed.

The return channel 130 may include an inner frame 131 and an outer frame 132.

The return channel 130 may be positioned below the impeller 110 and a seating portion 133 on which the impeller 110 is mounted may be formed on the upper surface of the inner frame 131.

The outer frame 132 may be located outside the inner frame 131 along the outer circumferential surface of the inner frame 131 and may be coupled with the impeller cover 120 to form an impeller accommodation space 134 for receiving the impeller 110 have.

The inner frame 131 and the outer frame 132 may be integrally formed.

A plurality of vanes 160 may be disposed in the return channel 130.

The plurality of blades 160 may be disposed on the return channel 130 to form an inclination with respect to the axial direction X of the return channel 130. Specifically, a plurality of vanes 160 can be disposed between the inner frame 131 and the outer frame 132. [

The plurality of blades 160 may include a first surface 162 and a second surface 163.

The first surface 162 is coupled to the outer surface of the inner frame 131 and the second surface 163 is coupled to the inner surface of the outer frame 132. The upper end 163a of the second surface 163 may extend further upward than the upper end 162a of the first surface 162. [ That is, the upper end 163a of the second surface 163 may extend further toward the impeller cover 120 than the upper end 162a of the first surface 162.

The upper end 162a of the first surface 162 and the upper end 163a of the second surface 163 may be connected in a straight line or a curved line. That is, the upper end 163a of the second surface 163 may be extended further upward than the upper end 162a of the first surface 162 and the upper end 162a of the first surface 162 and the upper end The manner of connecting the upper end 163a of the two surfaces 163 may vary.

The plurality of blades 160 may have a curved surface.

The direction in which the plurality of blades 160 are tilted is related to the rotating direction of the impeller 110. More specifically, when the impeller 110 rotates in the first direction H, the plurality of vanes 160 are arranged in a direction opposite to the first direction H with respect to the axial direction X of the return channel 130 Can be inclined along the second direction (I).

The plurality of blades 160 may be spaced apart from each other and disposed between the inner frame 131 and the outer frame 132. The plurality of vanes 160 spaced apart from each other can form a discharge passage 161 through which the air passing through the impeller 110 moves. The air moving along the discharge flow path 161 can be discharged to the outside of the suction unit 100 through the discharge port 135 formed at one end of the discharge flow path 161. The discharge port 135 may be formed at the lower end of the discharge flow path 161.

The impeller cover 120 may include a guide portion 122. Specifically, the guide portion 122 serves to guide the air that has passed through the flow path 115 of the impeller 110 to the discharge path 161.

The guide part 122 has a curved surface to prevent the air passing through the flow path 115 from staying in the space 190 formed between the impeller 110 and the return channel 130 until the air is introduced into the discharge path 161. [ . The guide portion 122 may have a convex curved surface toward the outside of the impeller cover 120. [

The guide portion 122 may have a curved surface having a curvature radius of 1 mm or more.

Air that has passed through the flow path 115 provided in the impeller 110 is introduced into the discharge flow path 161 provided in the return channel 130 along the guide part 122.

The moving direction of the air can be changed with respect to the guide portion 122. Specifically, the air that has passed through the opening hole 114 and flows into the impeller 110 moves in the horizontal direction along the flow path 115, and the air that has passed through the flow path 115 collides with the guide portion 122 And moves in the vertical direction toward the discharge flow path 161.

One end of the downwardly directed guide portion 122 can be coupled to the outer frame 132.

The suction unit 100 may further include a motor 140 that provides the impetus for the impeller 110 to rotate.

The motor 140 may include a BLDC motor, a DC motor, and an AC motor.

The motor 140 may be provided inside the return channel 130. Specifically, the motor 140 may be provided inside the inner frame 131.

The motor 140 may include a motor shaft 141. One end of the motor shaft 141 is connected to the second plate 112 of the impeller 110 and the other end of the motor shaft 141 is connected to the motor 140.

A motor shaft through hole 136 is formed in the seat 133 of the inner frame 131 so that one end of the motor shaft 141 is connected to the second plate 112 of the impeller 110 located above the inner frame 131. [ May be formed.

The air discharged to the exhaust port 135 formed at one end of the discharge flow path 161 is formed in the lower portion of the suction unit 100 through the internal flow path 41 formed inside the case 40 surrounding the suction unit 100 And is discharged through a discharge port 42 which is a discharge port. The air discharged through the discharge port (42) is exhausted to the exhaust section (15) via the exhaust passage (16). Here, the exhaust flow path 16 refers to a flow path through which the air discharged from the discharge port 42 of the suction unit 100 reaches the exhaust part 15.

The space formed between the dust collecting device 20 and the suction unit 100 may form a part of the exhaust flow path 16.

The exhaust passage 16 can be bent at least once. The exhaust flow path 16 extends from the discharge port 42 of the suction unit 100 to a space between the dust collecting apparatus 20 and the suction unit 100. The first flow path 16a extends from the first flow path 16a, A second flow path 16b formed between the apparatus 20 and the suction unit 100 and a third flow path 16c connecting the second flow path 16b and the discharge part 15. [

An exhaust filter 18 for separating foreign matter not removed by the dust collecting device 20 may be provided on the exhaust flow path 16. The exhaust filter 18 is preferably disposed on the first flow path 16a or the second flow path 16b. This is because when the exhaust filter 18 is installed on the first flow path 16a or the second flow path 16b, a sufficient distance can be secured from the exhaust filter 18 to the exhaust part 15, Since the noise generated when passing through the exhaust pipe 15 can be sufficiently reduced and exhausted through the exhaust unit 15. It is also possible to secure a sufficient area of the exhaust filter 18 by providing the exhaust filter 18 in the first flow path 16a or the second flow path 16b having a relatively large sectional area, 18) in the case where the pressure loss is small.

An opening (not shown) that can be opened and closed by a door (not shown) may be formed on the bottom surface of the main body 10 to facilitate replacement of the exhaust filter 18. [

7 is an enlarged cross-sectional view of a part of a suction unit of a vacuum cleaner according to an embodiment of the present invention.

An upper end portion 162a of the first surface 162 coupled to the inner frame 131 and an upper end portion 163a of the second surface 163 coupled to the outer frame 132 The connecting line A may form an inclination of 5 ° or more and 85 ° or less with respect to the axial direction X of the return channel 130.

As described above, the guide portion 122 may be convex toward the outside of the impeller cover 120, and may have a curved surface having a radius of curvature of 1 mm or more. The guide portion 122 may have a curved surface having a quadratic curve shape.

FIG. 8 is a side view of a suction unit of a vacuum cleaner according to an embodiment of the present invention. FIG. 9 is a perspective view of a vacuum cleaner according to an embodiment of the present invention, in which a portion of a plurality of blades, which are inclined in the same direction as the rotating direction of the impeller, Fig. 10 is an enlarged cross-sectional view of a portion of a plurality of blades which are inclined in a direction opposite to a rotating direction of an impeller in a vacuum cleaner according to an embodiment of the present invention.

8 to 10, on the end face Q cut off the return channel 130 in the horizontal direction Y perpendicular to the axial direction X of the return channel 130, A straight line B connecting the upper end 162b of the first surface 162 and the upper end 163b of the second surface 163 is formed between the center O of the return channel 130 and the center O of the return surface 130, And the angle? Formed with the straight line C connecting the upper end portion 162b may be 0 or more and 80 or less. More specifically, when the impeller 110 rotates in the first direction H, a straight line connecting the upper end 162b of the first surface 162 and the upper end 163b of the second surface 163 B is inclined by at least 0 degrees and not more than 80 degrees toward the first direction H with respect to the straight line C connecting the center O of the return channel 130 and the upper end 162b of the first surface 162 Can be. When the impeller 110 rotates in the first direction H, the straight line B (B) connecting the upper end 162b of the first face 162 and the upper end 163b of the second face 163 Is inclined by more than 0 degrees and less than 80 degrees toward the second direction I with respect to a straight line C connecting the center O of the return channel 130 and the upper end 162b of the first surface 162 .

The upper end 162b of the first face 162 facing upward is cut on the end face Q cut from the return channel 130 in the horizontal direction Y perpendicular to the axial direction X of the return channel 130. [ And the upper end 163b of the second surface 163 may be connected in a straight line or a curved line.

FIG. 11 is a cross-sectional view illustrating a main body of a vacuum cleaner according to another embodiment of the present invention, and FIG. 12 is a perspective view illustrating a suction unit of a vacuum cleaner according to another embodiment of the present invention. FIG. 13 is an exploded perspective view of a suction unit of a vacuum cleaner according to another embodiment of the present invention, and FIG. 14 is an enlarged perspective view of a suction unit of a vacuum cleaner according to another embodiment of the present invention. 15 is a sectional view of a suction unit of a vacuum cleaner according to another embodiment of the present invention. Hereinafter, a description overlapping with those already described with reference to Figs. 1 to 10 will be omitted.

11 to 15, the suction unit 100a of the vacuum cleaner 1a may include an impeller 110a, a return channel 130a, and a cover 170. As shown in FIG.

The upper surface of the cover 170 may have an air inlet 121a. A rotatable impeller 110a and a return channel 130a may be disposed inside the cover 170. [

The suction unit 100a may further include a motor 140a and a motor housing 150. [

The motor 140a provides a driving force for rotating the impeller 110a and is provided inside the motor housing 150. [ The motor housing 150 is located below the return channel 130a and can be coupled with the cover 170 to form a receiving space 180 in which the impeller 110a and the return channel 130a can be received.

At least one exhaust port 135a may be formed in the motor housing 150. The exhaust port 135a may be formed at the lower end of the motor housing 150, but the position of the exhaust port 135a is not limited thereto.

A plurality of vanes 160a may be disposed between the return channel 130a and the cover 170 along the outer circumferential surface of the return channel 130a. The plurality of blades 160a can form an inclination with respect to the axial direction X of the return channel 130a. More specifically, when the impeller 110a rotates in the second direction I, the plurality of vanes 160a are arranged in a direction opposite to the second direction I with respect to the axial direction X of the return channel 130a Can be inclined along the first direction (H).

The plurality of vanes 160a may be fixed to the extension portion 151 extending toward the outside of the motor housing 150 to face the return channel 130a. Specifically, the lower ends of the plurality of vanes 160a can be fixed to the extending portion 151 so as to be positioned between the return channel 130a and the extending portion 151. [

The plurality of blades 160a can form a convex curved surface toward the first direction H which is the same as the rotational direction of the impeller 110a.

The plurality of blades 160a may include a first surface 190 and a second surface 200. [ The first surface 190 may be coupled to the outer surface of the return channel 130a and the second surface 200 may be coupled to the inner surface of the cover 170. The upper end 200a of the second surface 200 may extend further upward than the upper end 190a of the first surface 190. [

The air that has flowed into the intake port 121a and has passed through the flow path 115a provided in the impeller 110a is moved into the motor housing 150 along the discharge flow path 161a formed by the plurality of vanes 160a, Thereby cooling the motor 140a inside the housing 150. [ Thereafter, air is radially discharged through at least one exhaust port 135a provided in the motor housing 150. [

The cover 170 may include a guide portion 122a for guiding the air that has passed through the flow path 115a of the impeller 110a to the discharge path 161a.

16 is an enlarged cross-sectional view of a suction unit of a vacuum cleaner according to another embodiment of the present invention.

16, a straight line A connecting the upper end 190a of the first surface 190 of the plurality of vanes 160a and the upper end 200a of the second surface 200, It is possible to form an inclination of not less than 5 degrees and not more than 85 degrees with respect to the axial direction X of the support shaft 130a.

17 is an enlarged cross-sectional view of a plurality of wings of a vacuum cleaner according to another embodiment of the present invention.

17, on the end face Q cut off the return channel 130a in the horizontal direction Y perpendicular to the axial direction X of the return channel 130a, the first face A straight line B connecting the upper end 190b of the first face 190 and the upper end 200b of the second face 200 is formed between the center O of the return channel 130a and the upper end 190a of the first face 190 190b may be 0 or more and 80 or less.

18 shows a relationship between the inclination of the return channel of the straight line A connecting the one end of the first surface and the one end of the second surface with respect to the axial direction X and the suction force of the vacuum cleaner according to the embodiment of the present invention FIG.

18, a straight line A connecting the upper ends 162a, 190a of the first surfaces 162, 190 of the plurality of vanes 160, 160a and the upper ends 163a, 200a of the second surfaces 163, As the inclination of 5 ° or more and 85 ° or less is formed with respect to the axial direction X of the return channels 130 and 130a, the suction force of the suction units 100 and 100a increases.

19 is a cross-sectional view of a straight line connecting one end of the first surface and one end of the second surface (FIG. 19) on a cross section Q on which the return channel is cut in the horizontal direction Y perpendicular to the axial direction X of the return channel B and the straight line C connecting the center of the return channel and one end of the first surface and the suction force of the vacuum cleaner according to an embodiment of the present invention.

As shown in the graph of Fig. 19, on the cross section Q on which the return channels 130 and 130a are cut in the horizontal direction Y perpendicular to the axial direction X of the return channels 130 and 130a, A straight line B connecting the upper ends 162b and 190b of the first surfaces 162 and 190 and the upper ends 163b and 200b of the second surfaces 163 and 200 connects the center O of the return channels 130 and 130a, The angle? Formed with the straight line C connecting the upper ends 162b and 190b of the surfaces 162 and 190 may be 0 degrees or more and 80 degrees or less.

The straight line B connecting the upper ends 162b and 190b of the upwardly facing first surfaces 162 and 190 and the upper ends 163b and 200b of the second surfaces 163 and 200 connects the center of the return channels 130 and 130a The closer to 0 the angle? Formed with the straight line C connecting the upper end portions 162a and 162a and the upper end portions 162b and 190b of the first surfaces 162 and 190 is, the better the suction force and efficiency are.

&Quot; - "and" + "in the expression of the angle [theta] represent the relationship with the rotational direction of the impeller 110. [ That is, a straight line B connecting the upper ends 162b and 190b of the first surfaces 162 and 190 and the upper ends 162b and 200b of the second surfaces 163 and 200 connects the center O of the return channels 130 and 130a, + "When inclined toward the same direction as the rotational direction of the impellers 110 and 110a with respect to the straight line C connecting the upper ends 162b and 190b of the first and second surfaces 162 and 190. On the other hand, a straight line B connecting the upper ends 162b and 190b of the first surfaces 162 and 190 and the upper ends 163b and 200b of the second surfaces 163 and 200 connects the center O of the return channels 130 and 130a, Quot; - "when inclined toward the direction opposite to the rotation direction of the impellers 110 and 110a with respect to the straight line C connecting the upper ends 162b and 190b of the first and second surfaces 162 and 190.

The suction unit 11 described above can be applied regardless of the type of the cleaner 1, 1 a. That is, the present invention can be applied not only to a cleaner of a Canister type and an up-right type, but also to a robot cleaner.

The foregoing has shown and described specific embodiments. However, it should be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the technical idea of the present invention described in the following claims .

1.1a: Cleaner 10: Body
10a: House Truth 10b: Suction chamber
11: Suction unit 12: Connection hose
13: Connector 14: Handle
15: exhaust part 16: exhaust air flow
16a: first flow path 16b: second flow path
16c: third flow path 17: connection piping
18: exhaust filter 20: dust collecting device
21: dust collecting device cover 22: discharge port of the dust collecting device
40: Case 41: Inner channel
42: outlet 100, 100a: suction unit
110, 110a: impeller 111: first plate
112: second plate 113: rotating blade
114: aperture hole 115, 115a:
120: Impeller cover 121, 121a:
122, 122a: guide part 130, 130a: return channel
131: Inner frame 132: Outer frame
133: seat part 134: impeller accommodation space
135, 135a: exhaust port 136: motor shaft through hole
140, 140a: motor 141: motor shaft
150: motor housing 151: extension
160, 160a: wings 161, 161a:
162, 190: first surface 162a, 162b, 190a, 190b:
163, 200: second surface 163a, 163b, 200a, 200b:
170: cover 180: accommodation space
190: Space

Claims (19)

A vacuum cleaner comprising a suction unit for generating a suction force for sucking air into the main body,
The suction unit includes:
A rotatable impeller;
An impeller cover having an inlet port formed therein; And
And a return channel coupled to the impeller cover to receive the impeller therein and having a discharge port formed therein,
Wherein a plurality of blades are disposed on the return channel so as to form an inclination with respect to an axial direction (X) of the return channel. The method according to claim 1,
Wherein the plurality of blades have curved surfaces. The method according to claim 1,
The impeller rotates in a first direction (H)
Wherein the plurality of blades form a slope along a second direction (I) opposite to the first direction (H) with respect to an axial direction (X) of the return channel. The method of claim 3,
The return channel includes:
Inner frame (INNER FRAME); And
And an outer frame (OUTTER FRAME) which is coupled to the impeller cover to form an impeller accommodation space for accommodating the impeller, and is positioned outside the inner frame to be spaced apart from the inner frame. 5. The method of claim 4,
Wherein the plurality of blades are disposed between the inner frame and the outer frame. 6. The method of claim 5,
Wherein the plurality of vanes are spaced apart from each other to form an exhaust passage through which the air having passed through the impeller moves,
Wherein air moving along the discharge passage is discharged to the outside of the suction unit through an exhaust port formed at one end of the discharge passage. The method according to claim 6,
Wherein the impeller cover includes a guide portion coupled to the outer frame to guide the air passing through the impeller to the discharge passage,
Wherein the guide portion has a curved surface. 8. The method of claim 7,
Wherein the guide portion is convex toward the outside of the impeller cover and has a curved surface having a radius of curvature of 1 mm or more. 6. The method of claim 5,
Wherein the plurality of blades
A first surface coupled to an outer surface of the inner frame; And
And a second surface coupled to the inner surface of the outer frame,
Wherein one end of the second surface extends further than the one end of the first surface toward the impeller cover. 10. The method of claim 9,
A straight line A connecting one end of the first surface and the one end of the second surface facing the impeller cover forms an inclination of not less than 5 degrees and not more than 85 degrees with respect to the axial direction X of the return channel Wherein said vacuum cleaner comprises: 10. The method of claim 9,
On a section (Q) of the return channel cut in the horizontal direction (Y) perpendicular to the axial direction (X) of the return channel,
And a straight line (B) connecting one end of the first surface facing the impeller cover and one end of the second surface is a straight line connecting the center of the return channel and one end of the first surface facing the impeller cover And the angle (?) With the center axis (C) is 0 ° or more and 80 ° or less. The method according to claim 1,
Wherein the suction unit further comprises a motor shaft having a motor shaft engaged with the impeller to provide a driving force for rotating the impeller, and a motor provided inside the return channel. A vacuum cleaner comprising a suction unit for generating a suction force for sucking air into the main body,
The suction unit includes:
A rotatable impeller;
A return channel disposed below the impeller; And
And a cover on which an intake port is formed,
A plurality of vanes are disposed between the return channel and the cover along the outer circumferential surface of the return channel,
Wherein the plurality of blades form a slope along a second direction (I) opposite to a first direction (H) in which the impeller rotates with respect to an axial direction (X) of the return channel. 14. The method of claim 13,
Wherein the suction unit further includes a motor housing coupled to the cover to form a housing space for housing the impeller and the return channel and a motor for providing a driving force to rotate the impeller therein,
And the motor housing has an exhaust port formed therein. 15. The method of claim 14,
Wherein the air sucked through the suction port and passed through the impeller moves to the inside of the motor housing along a discharge passage formed by the plurality of blades and is discharged to the outside of the suction unit through the exhaust port. 14. The method of claim 13,
Wherein the plurality of blades form a convex curved surface toward the first direction (H) which is the same as the rotational direction of the impeller. 14. The method of claim 13,
Wherein the plurality of blades
A first surface coupled to an outer surface of the return channel; And
And a second surface coupled to an inner surface of the cover,
And one end of the second surface extends further upward than the one end of the first surface. 18. The method of claim 17,
Wherein a straight line (A) connecting one end of the first surface and one end of the second surface forms an inclination of not less than 5 ° and not more than 85 ° with respect to the axial direction (X) of the return channel . 18. The method of claim 17,
On a section (Q) of the return channel cut in the horizontal direction (Y) perpendicular to the axial direction (X) of the return channel,
An angle (?) Formed by a straight line (B) connecting one end of the first surface and one end of the second surface to a straight line (C) connecting the center of the return channel and one end of the first surface is And is not less than 0 DEG and not more than 80 DEG.

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