WO2023128231A1

WO2023128231A1 - Vacuum cleaner

Info

Publication number: WO2023128231A1
Application number: PCT/KR2022/017268
Authority: WO
Inventors: 최중근; 김진백
Original assignee: 삼성전자주식회사
Priority date: 2022-01-03
Filing date: 2022-11-04
Publication date: 2023-07-06
Also published as: KR20230105100A

Abstract

Disclosed is a vacuum cleaner capable of effectively changing the direction of flow toward a diffuser and reducing loss caused by flow separation. The vacuum cleaner comprises a suction unit inside a body, wherein: the suction unit comprises an impeller arranged such that air is suctioned in response to the rotation around a shaft, and a plurality of diffuser vanes arranged such that air discharged from the impeller is guided; and the diffuser vanes are provided as one vane body of which the cross section has the shape of an air foil, and include a passage provided to cross through at least a portion of the vane body.

Description

Vacuum cleaner

The disclosed invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner having an improved structure to improve suction performance.

In general, a vacuum cleaner is a device that sucks in air containing dirt from a surface to be cleaned, separates and collects the dirt from the air, and discharges the purified air to the outside of the main body.

The vacuum cleaner may include an impeller and a diffuser as components that determine suction force.

The air sucked into the main body passes through the impeller and diffuser sequentially along a passage that has been bent several times. In this process, the pressure loss of air increases, and the gap between the impeller and the diffuser is designed to be narrow to compensate for the decrease in suction power 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 impeller and the motor coupled to the impeller may be increased, but in this case, the size of the vacuum cleaner is also increased, so it does not conform to the recent market trend requiring compact products.

Since a small vacuum cleaner such as a handheld vacuum cleaner cannot normally use a high-output suction motor, there is a big problem in that suction efficiency is reduced due to pressure loss or flow loss.

In addition, a diffuser for guiding the air discharged from the impeller is disposed in a circumferential direction, and a vane is mounted thereon to induce air. However, since a vane of a certain length is required to reduce the diameter, there is a problem in that the diameter reduction is limited.

In addition, there is a problem in that a loss may occur due to a sudden change in direction of the impeller discharged air, resulting in performance degradation.

In addition, when the diffuser is arranged in several layers to gradually change the flow direction, the direction change performance is improved, but there is a problem in that the length of the entire motor is increased.

One aspect of the disclosed invention provides a vacuum cleaner having an improved structure to enable miniaturization or compactification.

One aspect of the disclosed invention provides a vacuum cleaner having an improved structure to improve suction performance by reducing flow loss through flow control of vanes.

One aspect of the disclosed invention provides a vacuum cleaner having an improved structure to effectively change the direction of flow introduced into the diffuser and reduce loss due to flow separation.

According to one aspect of the disclosed invention, in a vacuum cleaner including a suction unit inside a main body, the suction unit includes: an impeller disposed to suck air as it rotates about an axis; and a plurality of diffuser vanes arranged to guide the air discharged from the impeller, and each of the diffuser vanes is provided as one vane body having an airfoil shape in cross section, and crosses at least a portion of the vane body. It includes a passage provided through the road.

The vane body includes a first surface and a second surface forming a rear surface of the first surface, and the passage is provided to penetrate and connect between the first surface and the second surface.

The passage includes an inlet portion formed on the second surface and an outlet portion connected to the inlet portion and formed on the first surface.

The passage is provided to form an inclination with respect to the axial direction of the impeller.

Positions of the inlet part and the outlet part have different positions in the direction of the thickness t of the diffuser vane.

Positions of the inlet part and the outlet part have different positions in the direction of the width (w) of the diffuser vane.

An angle of the exit portion corresponds to a tangential direction of the first surface.

The length of the inlet part is formed greater than the length of the outlet part.

The passage further includes a curved portion having a curvature at least in part.

According to one aspect of the disclosed invention, the vacuum cleaner includes a main body; a suction head provided to suck foreign substances from the surface to be cleaned into the main body; a motor disposed inside the main body to generate a suction force; an impeller coupled to the shaft of the motor to generate air flow; and a diffuser disposed between the motor and the impeller to guide air discharged from the impeller, wherein the diffuser includes a first casing provided to accommodate the motor, and air discharged from the impeller. A second casing arranged to be spaced apart along the outer circumference of the first casing to form a diffuser flow passage in which a moving diffuser is provided, and a plurality of casings are provided between the first casing and the second casing to guide the air discharged from the impeller. and a diffuser vane, wherein the diffuser vane is provided as one vane body having an airfoil-shaped cross section, and includes a passage provided through at least a portion of the vane body.

The length d1 of the inlet is greater than the length d2 of the outlet.

According to one aspect of the disclosed invention, the vacuum cleaner includes a main body; a suction head provided to suck foreign substances from the surface to be cleaned into the main body; and a suction unit disposed inside the main body to generate a suction force, wherein the suction unit includes: a motor; and a housing provided to accommodate the motor; an impeller rotatably coupled to an upper portion of the housing and provided to generate a flow of air; and a diffuser arranged to guide the air discharged from the impeller, wherein the diffuser includes a plurality of diffuser vanes provided on an outer circumferential surface of the housing, and the diffuser vane has an airfoil-shaped cross section. It is provided as a vane body, and includes a passage provided through and passing through at least a portion of the vane body.

The passage includes an inlet and an outlet connected to the inlet.

Positions of the inlet part and the outlet part have different positions in the thickness direction of the diffuser vane.

According to one aspect of the disclosed invention, the length of the vane can be shortened and the axial length of the motor can be reduced, resulting in miniaturization or compactification.

In addition, there is an effect of effectively changing the direction of the flow introduced into the diffuser and reducing loss due to flow separation.

In addition, there is an effect of improving suction performance by reducing flow loss through flow control of the vane.

1 schematically shows a vacuum cleaner according to an embodiment.

2 is a partially exploded perspective view showing a suction unit mounted on a vacuum cleaner body according to an embodiment.

3 is a perspective view showing a part of a cleaner main body to which a suction unit according to an embodiment is mounted;

FIG. 4 is a cross-sectional view showing part A-A' of FIG. 3, showing a cross-sectional state of the suction unit according to an embodiment.

5 is a perspective view showing a suction unit according to an embodiment.

6 is an exploded perspective view showing a suction unit according to an embodiment.

7 is a front view showing a suction unit according to an embodiment.

8 is a perspective view illustrating a diffuser according to an exemplary embodiment.

9 is a view showing a partial cross-section of a diffuser according to an embodiment.

FIG. 10 is a partially enlarged view of FIG. 9, showing a diffuser vane according to an exemplary embodiment.

Fig. 11 is a front view of the diffuser vane of Fig. 9;

12 is a diagram illustrating a flow state of air introduced into a diffuser according to an exemplary embodiment.

13 is a view showing a passage located at an upper side from the center of a diffuser vane according to an embodiment.

14 is a view showing a plurality of passages provided in a diffuser vane according to an embodiment.

15 is a perspective view illustrating a vane of a diffuser vane according to an exemplary embodiment;

FIG. 16 is a view schematically illustrating a passage of the diffuser vane shown in FIG. 15;

17 is a front view of a vane of the diffuser vane shown in FIG. 15;

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

In addition, the same reference numerals or numerals presented in each drawing in this specification indicate parts or components that perform substantially the same function.

In addition, terms used in this specification are used to describe embodiments, and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It does not preclude in advance the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

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

In addition, the terms "front", "rear", "upper", "lower", "top", and "bottom" used in the following description are defined based on drawings, and by these terms, the shape and position of each component is not limited.

1 schematically illustrates a vacuum cleaner according to an embodiment, and FIG. 2 is a partially exploded perspective view illustrating a suction unit mounted on a main body of the vacuum cleaner according to an embodiment.

As shown in FIGS. 1 and 2 , the vacuum cleaner 1 includes a cleaner body 10, an extension tube 11 detachably coupled to the cleaner body 10, and detachably coupled to the extension tube 11 It may include a suction head 16 and a dust collector 20 (hereinafter referred to as a 'dust bin') detachably coupled to the cleaner body 10.

The cleaner body 10 may include a suction unit 100 that generates a suction force required to suck foreign substances on the surface to be cleaned, and a dust bin 20 that accommodates the foreign substances sucked from the surface to be cleaned.

The suction unit 100 may include a motor 400 provided to drive the vacuum cleaner 1. The motor 400 may generate power to generate a suction force inside the cleaner body 10 .

A detailed description of the suction unit 100 of the cleaner body 10 will be described later.

The dust bin 20 may be configured to filter and collect dust or dirt in the air introduced through the suction head 16 . The dust container 20 may be detachably provided from the cleaner body 10 .

The cleaner body 10 may include a filter housing 14 . The filter housing 14 is provided in a substantially donut shape and can accommodate the filter 15 therein. The type of filter is not limited, but as an example, a HEPA filter may be disposed inside the filter housing 14 . The filter 15 may filter ultrafine dust that is not filtered out in the dust bin 20 .

The cleaner body 10 may include a handle 12 so that a user can hold and operate the vacuum cleaner 1 . The user may clean by holding the handle 12 and moving the vacuum cleaner 1 forward and backward.

The cleaner body 10 may further include a manipulation unit 13 . The user can turn on/off the vacuum cleaner 1 or adjust the suction strength by manipulating a power button or the like provided on the control unit 13 .

The suction head 16 may be configured to contact the surface to be cleaned. The suction head 16 may be provided to contact the surface to be cleaned and to suck foreign substances such as dust present on the surface to be cleaned.

The suction head 16 and the cleaner body 10 may be connected by an extension tube 11. One end of the extension pipe 11 may be pivotally connected to the suction head 16 so that the suction head 16 can jointly move with respect to the extension pipe 11 .

The extension pipe 11 may include an extension pipe connector 11a. The extension pipe connecting portion 11a is provided to separate or couple the extension pipe 11 from the cleaner body 10 . The extension tube 11 may include an extension tube separation button 11b. The user may separate the extension tube 11 from the cleaner body 10 by pressing the extension tube separation button 11b. After the extension pipe 11 is separated from the cleaner body 10, the suction head 16 may be directly connected to the cleaner body 10.

The extension pipe 11 of the cleaner body 10 may include a suction head connection part 11c. The suction head connection portion 11c may be provided to separate the suction head 16 from the cleaner body 10 or to couple it to the cleaner body 10 .

The cleaner body 10 may further include a battery 15 . The battery 15 may be detachably mounted on the cleaner body 10 .

In addition, although not shown, the battery 15 may be electrically connected to a charging terminal provided in a vacuum cleaner mounting device or a docking station (not shown). The battery 15 may be charged by receiving power from a charging terminal provided in the docking station.

Hereinafter, the operation process of the vacuum cleaner 1 will be described.

A user may turn on/off the power of the suction unit 100 inside the cleaner body 10 by using a power button provided on the control unit 13 .

The suction head 16 of the vacuum cleaner 1 can be brought into contact with the surface to be cleaned and moved using the handle 12 to suck outside air and dust.

When the vacuum cleaner 1 is operated, external air may flow into the dust bin 20 through the suction head 16 and the cyclone (not shown). External air containing introduced dust may be introduced into a centrifugal separation chamber (not shown) while being rotated, and dust contained in the air may be separated from the air and stored in the dust container 20 by centrifugal force. In addition, the dust-separated air moves upward and passes through the filter 15 mounted on the upper portion without changing the traveling direction.

At this time, fine dust remaining in the air may be removed by the filter 15 and discharged to the exhaust unit 14a of the vacuum cleaner 1 through the suction unit 100.

3 is a perspective view showing a part of a cleaner main body to which a suction unit is mounted according to an embodiment, and FIG. 4 is a cross-sectional view showing a section AA′ of FIG. 3, showing a cross-sectional state of the suction unit according to an embodiment. 5 is a perspective view showing a suction unit according to an embodiment, and FIG. 6 is an exploded perspective view showing a suction unit according to an embodiment.

As shown in FIGS. 3 to 6 , the suction unit 100 of the vacuum cleaner 1 may be provided inside the cleaner body 10 to generate suction force.

The suction unit 100 may include a suction housing 110 forming an exterior.

The suction unit 100 may include a motor 400. The motor 400 may include a stator 410 and a rotor assembly 420 . The suction unit 100 may further include a circuit board 190 that controls the motor 400 . The suction unit 100 may include

housings

300 and 500 provided to accommodate the motor 400 . The

housings

300 and 500 may include an upper housing 300 and a lower housing 500 .

The suction unit 100 may include an impeller 200 coupled to the motor 400 to generate air flow.

The suction housing 110 may be provided to cover the impeller 200 . The intake housing 110 may further include a guide member (not shown) for guiding the air sucked in by the impeller 200 . The suction housing 110 is provided to be coupled to the upper housing 300 .

The suction housing 110 may be disposed upward along the axial direction X of the impeller 200 . Suction housing 110 may be formed in a cylindrical shape, but is not limited thereto.

An air intake port 111 may be provided in the intake housing 110 to allow air to flow into the intake unit 100 . The intake housing 110 may include a shroud 111a. The shroud 111a is provided to correspond with the impeller 200. The shroud 111a is provided to guide air introduced into the intake housing 110 . Specifically, the shroud 111a is provided to guide air introduced through the air inlet 111 into the intake housing 110 .

The motor 400 may include an impeller 200 coupled to the shaft 421 to generate air flow.

The impeller 200 may include a shaft coupling portion 210 to which the shaft 421 is coupled. When the shaft 421 is coupled to the shaft coupling part 210, the impeller 200 may rotate together with the shaft 421.

The impeller 200 may include a hub 230 and a plurality of wings 220 protruding from the hub 230 to form an air flow.

The hub 230 is provided so that its cross-sectional area is reduced along the axial direction of the shaft 421, and as the impeller 200 rotates, air introduced in the axial direction (X) is discharged in the radial direction of the shaft 421. can

The plurality of wings 220 may be provided on the hub 230 to rotate together with the hub 230 to form an air flow. A plurality of wings 220 may be provided on the outer surface of the hub 230 .

A bearing (not shown) may be disposed inside the hub 230, and a plurality of wings 220 may be disposed outside the hub 230 to form an air flow.

The

housings

300 and 500 may be provided to accommodate the stator 410 and the rotor assembly 420 . The

housings

300 and 500 may be formed by injection molding. Since the

housings

300 and 500 use injection-molded materials, they can have a relatively light weight compared to housings made of metal. Among the

housings

300 and 500, the upper housing 300 provided at the top may be the first housing. The lower housing 500 provided at the lower portion may be the second housing.

The upper housing 300 and the lower housing 500 may be coupled to each other with the rotor 422 and the stator 410 interposed therebetween. As the upper housing 300 and the lower housing 500 are coupled, the rotor 422 may be coupled with the stator 410 at a distance.

The upper housing 300 may be provided in a substantially cylindrical shape. The upper housing 300 has an outer circumferential surface 320 provided to be coupled with the suction housing 110, an upper surface 310 provided to cover the upper surfaces of the stator 410 and the rotor 422, and extending from the upper surface 310. It is provided and may include an inner circumferential surface 311 forming a flow path 340 between the outer circumferential surface 320 and the outer circumferential surface 320 .

The upper housing 300 may further include a first coupling portion 322 extending in the axial direction and coupled to the lower housing 500 . The first coupling part 322 may be provided to protrude downward from the outer circumferential surface 320 in the axial direction. The first couplers 322 may be spaced apart along the circumferential direction of the upper housing 300 and may be provided in plural. For example, although three first couplers are shown spaced apart from each other, the spirit of the present invention is not limited thereto.

The upper housing 300 may include a seating portion 312 provided to seat the upper frame 430 thereon. The shaft 421 of the motor 400 may pass through the seating portion 312 of the upper housing 300 .

The upper housing 300 may include a passage 340 through which air discharged from the impeller 200 flows, and a diffuser vane 330 guiding air flowing through the passage 340 .

The upper housing 300 may be a diffuser 600 provided with a diffuser vane 330 .

The diffuser vane 330 may be integrally formed with the upper housing 300 . The diffuser vane 330 may be formed by being injected together when the upper housing 300 is injected.

A detailed description of the diffuser vane 330 will be described later.

The lower housing 500 may include a motor seating portion 312 in which the motor 400 is seated. A lower frame 440 may be coupled to the motor seat 312 . The lower housing 500 may include a second coupling portion 520 provided to be coupled with the first coupling portion 322 of the upper housing 300 . The number of second coupling parts 520 may correspond to the number of first coupling parts 322 . The first coupling portion 322 and the second coupling portion 520 may couple the upper housing 300 and the lower housing 500 through the coupling member 540 . A coupling hole 530 may be provided in the lower housing 500 so that the coupling member 540 may pass therethrough. The coupling member 540 may couple the upper housing 300 and the lower housing 500 by penetrating the coupling hole 530 of the lower housing 500 .

The motor 400 may be coupled to the upper housing 300 and the lower housing 500 by the upper frame 430 and the lower frame 440 , respectively.

The upper frame 430 and the lower frame 440 may include a first contact rib 431 and a second contact rib 441 , respectively. For example, the first contact rib 431 may extend downward of the upper frame 430 and contact the outer circumferential surface of the stator core 413 . The second contact rib 441 may extend upward of the lower frame 440 and contact the outer circumferential surface of the stator core 413 . The first contact rib 4 and the second contact rib 441 may be provided to be connected to each other.

The stator 410 of the motor 400 may include a stator core 413, a stator coil 412, an insulator 411, and a rotor receiving portion (not shown). The stator 410 may be configured to generate magnetic flux when current is applied to the stator coil 412 .

A rotor accommodating portion 414 for accommodating the rotor 422 may be provided at the center of the stator core 413 . The rotor 422 may be disposed in the rotor accommodating portion 414 . The rotor 422 may interact electromagnetically with the stator 410 .

The rotor 422 may be provided as a permanent magnet having magnetism or may include a coil having electromagnetic properties. Accordingly, it may interact with the stator 410 electromagnetically and be rotatably provided.

The stator coil 412 may be wound around the stator core 413 in a state where the insulator 411 is coupled to the stator core 413 .

The insulator 411 may be made of a material having electrical insulation. The insulator 411 surrounds the stator core 413 to insulate the stator core 413 and the stator coil 412 .

The motor 400 may be provided so that the insulator 411 can be inserted into and fixed to the circuit board 190 .

The rotor assembly 420 may include a shaft 421 . The shaft 421 may be provided to rotate when the rotor 422 electromagnetically interacts with the stator 410 .

The motor 400 may further include a circuit board 190 provided to control speed. The circuit board 190 may be disposed under the motor 400, but is not limited thereto.

7 is a front view showing a suction unit according to an embodiment, FIG. 8 is a perspective view showing a diffuser according to an embodiment, FIG. 9 is a partial cross-sectional view of the diffuser according to an embodiment, and FIG. 10 is a view 9 is a partially enlarged view showing a diffuser vane according to an embodiment, FIG. 11 is a view showing the diffuser vane of FIG. 9 from the front, and FIG. 12 is a flow state of air introduced into the diffuser according to an embodiment. Hereinafter, reference numerals not shown refer to FIGS. 1 to 6 .

As shown in FIGS. 7 to 12 , the passage 340 of the suction unit 100 may be used as the same meaning as the diffuser passage 340 . Also, the upper housing 300 may be used in the same sense as the diffuser 600 .

The diffuser 600 may include

casings

611 and 620 . The

casings

611 and 620 may include a first casing 611 and a second casing 620 . The second casing 620 may be located outside the first casing 611 in a radial direction. The second casing 620 may be spaced apart from the outer circumference of the first casing 611 . A diffuser passage 340 may be formed between the first casing 611 and the second casing 620 .

The first casing 611 may include an upper surface 610 of the original plate and an inner surface extending from the upper surface 610 . The first casing 611 may include a seating portion 312 . The seating portion 312 of the first casing 611 may be formed at the center of the upper surface 610 . The seating portion 312 may have a hole shape. The impeller 200 may be connected to the shaft 421 of the motor 400 through the seating portion 312 of the first casing 611 .

The second casing 620 may be formed in a cylindrical shape. The second casing 620 may be formed to be spaced apart from the inner surface of the first casing 611 to the outside. The second casing 620 may be spaced apart from the inner surface along the outer circumference. The second casing 620 may include an outer surface disposed spaced apart from the inner surface.

The diffuser 600 may further include a diffuser passage 640 . The diffuser passage 640 may be provided inside the

casings

611 and 620 so that air discharged from the impeller 200 can move. The diffuser passage 640 may be provided between the first casing 611 and the second casing 620 . The diffuser passage 640 may be provided between the inner surface of the first casing 611 and the outer surface of the second casing 620 .

The diffuser passage 640 has an inlet 640a located upstream in the direction M in which the air discharged from the impeller 200 moves, and located downstream in the direction M in which the air discharged from the impeller 200 moves. It may include an outlet (640b) to.

The diffuser 600 may include a plurality of diffuser vanes 630 . A plurality of diffuser vanes 630 may be positioned in the diffuser passage 640 to guide air discharged from the impeller 200 . The diffuser vane 630 may be disposed between the first casing 611 and the second casing 620 . The diffuser vane 630 may connect between the first casing 611 and the second casing 620 . The diffuser vane 630 may be disposed between inner and outer surfaces of the

casings

611 and 620 . The diffuser vane 630 may be integrally formed with the

casings

611 and 620 . The diffuser vane 630 may be integrally formed with at least one of the first casing 611 and the second casing 620 . The diffuser vane 630 may be integrally formed with at least one of the first casing 611 and the second casing 620 to connect the first casing 611 and the second casing 620 . A plurality of diffuser vanes 630 may be provided. Each diffuser vane 630 may be spaced apart from each other in the diffuser passage 640 . The diffuser vanes 630 may be spaced apart at regular intervals. The diffuser vane 630 may be disposed to be inclined along the rotation direction R of the impeller 200 .

The diffuser vane 630 may be provided such that an axial cross section of the impeller 200 has an airfoil shape. The diffuser vane 630 may be provided to have an inclination with respect to the axial direction of the impeller 200 .

The rotational flow of air generated by the rotation of the impeller 200 may be converted into an axial flow along the diffuser vane 630 .

The diffuser vane 630 may include a vane body 630a. The diffuser vane 330 may be formed of one vane body 630a. The vane body 630a may include a first surface 631 provided on one side so that a cross section forms an airfoil shape, and a second surface 632 connected to the first surface 631 . Air discharged from the impeller 200 may move along the first surface 631 and the second surface 632 of the vane body 630a.

Air moving along the diffuser vane 630 may be converted from rotational flow to axial flow.

The air flow can be stripped from the flow surface it follows, increasing flow resistance and increasing losses. Specifically, air moving along the diffuser vane 630 may cause fluid separation on the pressure surface of the vane body. That is, the air moving along the vane body is separated from the high-pressure area, resulting in loss.

The diffuser vane 630 may include a passage 700 . The diffuser vane 630 may include a passage 700 formed to prevent fluid separation. The diffuser vane 630 may include a passage 700 formed by cutting at least a portion thereof.

A passage 700 may be formed in the vane body 630a to prevent fluid separation from the diffuser vane 630 . The diffuser vane 630 may include a passage 700 formed to pass through at least a portion of one vane body 630a. The passage 700 may be formed by cutting in the thickness t direction of the vane body 630a forming the diffuser vane 630 . The passage 700 of the diffuser vane 330 may be formed to pass through the diffuser vane 330 in a thickness t direction. In the embodiment of the present invention, the passage is shown as being located at the center of the vane body of the diffuser vane, but the spirit of the present invention is not limited thereto. For example, the passage can be located above or below the center of the diffuser vane.

Also, in the embodiment of the present invention, one passage is formed at the center of the vane body of the diffuser vane as an example, but the spirit of the present invention is not limited thereto. For example, at least one passage may be formed in the vane body.

The passage 700 of the diffuser vane 630 may include an inlet 710 and an outlet 720 formed to correspond to the inlet 710 . The inlet 710 and the outlet 720 of the passage 700 may be connected. The inlet 710 and the outlet 720 of the passage 700 may be connected in the direction of the thickness t of the diffuser vane 630 .

The inlet 710 of the passage 700 may be located on the second surface 632 of the vane body 630a. The outlet 720 of the passage 700 may be located on the first surface 631 of the vane body 630a. The inlet part 710 and the outlet part 720 of the passage 700 may be connected to each other and provided to pass through at least a portion of the vane body 632a.

The inlet 710 and the outlet 720 of the passage 700 may be formed at different positions in the thickness t direction of the diffuser vane 630 . The inlet portion 710 and the outlet portion 720 of the passage 700 may be inclined in an axial direction. The inlet part 710 and the outlet part 720 of the passage 700 may further include a curved part 730 including a curvature at least in part. In the embodiment, the curved portion 730 has been shown to be formed in the outlet 720 as an example, but is not limited thereto. For example, the curved portion may also be formed in the inlet portion.

The inlet portion 710 forming the passage 700 may be formed with a first length d1 on the second surface 632 of the vane body 630a. The outlet part 720 forming the passage 700 may be formed in the second length d2 on the first surface 631 of the vane body 630a. The inlet 710 and the outlet 720 of the passage 700 may have different lengths. The first length d1 of the inlet 710 of the passage 700 may be greater than the second length d2 of the outlet 720 . In the embodiment, the first length forming the inlet of the passage and the second length forming the outlet are different from each other, but are not limited thereto. For example, the first length of the inlet part and the second length of the outlet part forming the passage may have the same length. Also, the first length d1 of the inlet 710 of the passage 700 may be smaller than the second length d2 of the outlet 720 .

The outlet part 720 forming the passage 700 may be formed in the second length d2 on the first surface 631 of the vane body 630a. The outlet 720 of the passage 700 may be formed at a first angle θ1, and the first angle θ1 of the outlet 720 is a tangential line of the first surface 631 of the vane body 630a. can respond to directions.

The inlet portion 710 of the passage 700 may be formed at a second angle θ2, and the second angle θ2 of the inlet portion 710 is a tangential line of the second surface 632 of the vane body 630a. can respond to directions. The first angle θ1 of the outlet 720 of the passage 700 and the second angle θ2 of the inlet 710 may be formed differently from each other.

The inlet portion 710 forming the passage 700 may include a first inner point 711 located on the inner side of the vane body 630a in the width w direction, that is, on the first casing 611 side. .

In addition, the inlet portion 710 may include a first outer point 712 located on the outer side of the vane body 630a in the width w direction, that is, on the side of the second casing 620 . The first inner point 711 and the first outer point 712 may be located at the same height. The first inner point 711 and the first outer point 712 of the inlet portion 710 may be formed horizontally.

The exit portion 720 forming the passage 700 may include a second inner point 721 located on the inner side of the vane body 630a in the width w direction, that is, on the first casing 611 side. .

In addition, the outlet part 720 may include a second outer point 722 located outside the vane body 630a in the width w direction, that is, on the second casing 620 side. The second inner point 721 and the second outer point 722 may be positioned at the same height. The second inner point 721 and the second outer point 722 may be formed horizontally.

Air discharged from the impeller 200 is converted in the axial direction along the vane body 630a of the diffuser vane 630. Air moving in the axial direction along the vane body 630a moves in the axial direction along the first surface 631 and the second surface 632 of the vane body 630a. Some of the air moving in the axial direction along the vane body 630a may be guided to the passage 700 of the vane body 630a. Some of the air moving in the axial direction along the vane body 630a may be guided to the passage 700 formed in the vane body 630a. Air discharged from the impeller 200 moves along the vane body 630a of the diffuser vane 630 . In addition, some of the air moving in the axial direction along the vane body 630a is introduced through the inlet 710 of the passage 700 and moves through the outlet 720 .

The flow of air guided to the passage 700 of the diffuser vane 330 can improve direction conversion efficiency of the entire flow for converting the rotational flow generated by the rotation of the impeller 200 into an axial flow.

FIG. 13 is a view showing a passage located above the center of a diffuser vane according to an embodiment, and FIG. 14 is a view showing a plurality of passages provided in a diffuser vane according to an embodiment. Hereinafter, descriptions of overlapping parts with the above descriptions will be omitted.

As shown in FIGS. 13 and 14 , the passage 700A formed in the diffuser vane 630 of the diffuser 600 may be spaced upward from the center C of the diffuser vane 630 .

The passage 700A of the diffuser vane 630 may be formed at a position where separation of the diffuser vane 630 occurs.

The passage 700A of the diffuser vane 630 may be spaced upward from the center C of one vane body 630a. The passage 700A of the diffuser vane 630 may be located at a position spaced upward from the center C of the vane body 630a. In the embodiment, the passage is shown as being spaced apart from the center of the vane body upwardly, but is not limited thereto. For example, the passage may be formed at a location where separation of the diffuser vane occurs. For example, it may be spaced apart from the center of the vane body to the lower side.

In addition, the

passages

700A and 700B formed in the diffuser vane 630 of the diffuser 600 are formed to be spaced apart from the center C of the diffuser vane 630 to the upper side and / or to the lower side. It may include a second passage (700B) formed spaced apart.

The

passages

700A and 700B of the diffuser vane 630 may be formed at locations where separation occurs. The first passage 700A of the diffuser vane 630 is spaced upward from the center C of one vane body 630a, or the second passage 700B is located at the center of one vane body 630a ( C) may be located spaced apart from the lower side.

In the embodiment, it is shown that two passages are spaced apart from the center of the vane body in upper and lower directions, but are not limited thereto. For example, a plurality of passages may be formed at various locations where separation of the diffuser vane occurs.

15 is a perspective view showing a vane of a diffuser vane according to an embodiment, FIG. 16 is a view schematically showing a passage of the diffuser vane shown in FIG. 15, and FIG. 17 is a front view of the vane of the diffuser vane shown in FIG. 15 It is a drawing shown in Hereinafter, descriptions of overlapping parts with the above descriptions will be omitted.

As shown in FIGS. 15 to 17 , the passage 700C formed in the diffuser vane 630 may be variously changed according to the position of separation.

The passage 700C may include an inlet portion 710C and an outlet portion 720C. Positions of the inlet portion 710C and the outlet portion 720C of the passage 700C may be differently positioned in the width w direction of the diffuser vane 630 .

Specifically, the diffuser 600 further includes a shroud 111a for guiding air discharged from the impeller 200, and the passage 700C of the diffuser vane 600 is positioned on the side of the shroud 111a as a hub. It can be located above the position of the (230) side. That is, the inside and outside of the passage 700C may be positioned differently in the width direction w. For example, the inner side of the passage 700C in the width direction w of the vane body 630 may be positioned higher than the outer side.

The inlet portion 710C forming the passage 700C may include a first inner point 711C located on the inner side of the vane body 630a in the width w direction, that is, on the first casing 611 side. .

In addition, the inlet portion 710C may include a first outer point 712C located on the outer side of the vane body 630a in the width w direction, that is, on the second casing 620 side. The first inner point 711C and the first outer point 712C may be formed at different heights.

The first inner point 711C may be formed at the first position P1. The first outer point 712C may be formed at the second position P2. The first position P1 and the second position P2 may have different heights. The first position P1 may be located higher than the second position P2.

The outlet portion 720C forming the passage 700C may include a second inner point 721C located on the inner side of the vane body 630a in the width w direction, that is, on the first casing 611 side. .

In addition, the outlet portion 720C may include a second outer point 722C located outside the vane body 630a in the width w direction, that is, on the second casing 620 side. The second inner point 721C may be formed at the first position P1. The second outer point 722C may be formed at the second position P2. The first position P1 and the second position P2 may have different heights. The first position P1 may be located higher than the second position P2.

As such, since the passage 700C is formed at the position where the flow separation of the diffuser vane 630 occurs, loss of flow can be prevented and the direction of the flow can be effectively changed.

As described above, the embodiments have been described for the understanding of the present invention, but as can be seen by those skilled in the art, the present invention is not limited to the specific embodiments described herein, but various modifications are made within the scope of the present invention. , may be changed and replaced.

Claims

In the vacuum cleaner including a suction unit inside the main body,

The suction unit,

An impeller arranged to suck in air as it rotates about an axis;

Including; a plurality of diffuser vanes arranged to guide the air discharged from the impeller;

Each of the diffuser vanes,

A vacuum cleaner comprising a passage provided in one vane body having an airfoil-shaped cross section and passing through at least a portion of the vane body.
According to claim 1,

The vane body,

the first page;

A second surface forming a rear surface of the first surface,

The passage is provided to penetrate and connect between the first surface and the second surface.
According to claim 2,

the passage,

An inlet formed on the second surface;

A vacuum cleaner comprising an outlet connected to the inlet and formed on the first surface.
According to claim 3,

The passage is provided to form an inclination with respect to the axial direction of the impeller.
According to claim 3,

The vacuum cleaner of claim 1 , wherein positions of the inlet part and the outlet part are different from each other in a thickness (t) direction of the diffuser vane.
According to claim 5,

The vacuum cleaner of claim 1 , wherein positions of the inlet part and the outlet part are different from each other in a width (w) direction of the diffuser vane.
According to claim 6,

An angle of the outlet portion corresponds to a tangential direction of the first surface.
According to claim 6,

The length of the inlet part is formed to be greater than the length of the outlet part.
According to claim 6,

The vacuum cleaner of claim 1 , wherein the passage further includes a curved portion having a curvature at least in part.