KR20220161930A - cleaner - Google Patents

Abstract

The present invention relates to a vacuum cleaner. More specifically, the present invention relates to a vacuum cleaner which includes a silencer, wherein the silencer includes a silencer housing arranged on the basis of a central axis and having a chamber therein, an open port formed on one side of the silencer housing and communicating the chamber with the external space, and a partition plate disposed inside the silencer housing and dividing the chamber into at least two chambers, so that it is possible to absorb noise in a specific frequency range among noises generated in the exhausted air.

Description

cleaner {cleaner}

The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner equipped with a silencer.

BACKGROUND ART In general, a vacuum cleaner is a home appliance that sucks up small garbage or dust by sucking air using electricity and fills a dust bin in the product, and is commonly referred to as a vacuum cleaner.

Such cleaners may be classified into manual cleaners for cleaning while a user directly moves the cleaner, and automatic cleaners for performing cleaning while driving by itself. Manual cleaners may be classified into canister-type cleaners, upright cleaners, handheld cleaners, and stick-type cleaners according to the shape of the cleaner.

In household cleaners, canister-type vacuum cleaners have been widely used in the past, but recently, handheld vacuum cleaners and stick vacuum cleaners, which provide convenience in use by integrally providing a dust bin and a cleaner body, have been widely used.

The Hand Vacuum Cleaner maximizes portability and is light in weight, but has a short length, so the cleaning area may be limited while sitting. Thus, it is used to clean localized areas, such as on a desk or sofa, or in a car.

As a prior art, Korean Patent Publication No. 10-2020-0031509 is presented. The prior art is an invention related to a handheld vacuum cleaner. According to the prior literature, air is introduced into the air inlet, dust is separated through the cyclone, dust is filtered through the pre-filter, flows into the HEPA filter after passing through the motor, and dust is removed while passing through the HEPA filter. Filtered, the filtered air is discharged to the outside of the cleaner.

Including prior literature, general handheld vacuum cleaners generate noise according to operation. The noise of the vacuum cleaner has a noise distribution of a broadband component due to flow noise caused by suction and rotation of the suction motor.

As a method of reducing noise in a conventional vacuum cleaner, a method of absorbing noise by attaching a sound absorbing material or reducing the output of a motor has been mainly used.

However, when a sound absorbing material is used, there is a problem in that the efficiency of absorbing low-frequency noise is lowered. In addition, since air flow resistance occurs as air passes through the sound absorbing material, the operation performance of the vacuum cleaner is deteriorated.

Korean Patent Publication No. 10-2020-0031509

An object to be solved by the present invention is to provide a cleaner equipped with a silencer that absorbs noise generated from air discharged from the cleaner and does not interfere with the flow of air.

Another object of the present invention is to provide a cleaner equipped with a silencer that selectively absorbs noise in a specific frequency range.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the vacuum cleaner according to the present invention includes a body housing having a discharge unit, and a silencer disposed in the discharge unit and absorbing noise in a specific frequency range among noises generated from discharged air. The silencer is disposed on the basis of the central axis and has a silencer housing having a chamber therein, an open port formed on one side of the silencer housing and communicating the chamber with the external space, disposed inside the silencer housing and dividing the chamber into at least two Includes partition plate.

The specific frequency may be determined by at least one of the volume of the chamber, the cross-sectional area of the open port, or the distance from the open port to the inlet end of the chamber.

According to the first and second embodiments of the present invention, the silencer is disposed in the center of the chamber, includes a frame extending in the longitudinal direction of the central axis of the silencer, and the partition plate may extend radially outward from the frame. According to the first embodiment, at least two open ports may be formed on the side plate and connected to one chamber. According to the second embodiment, open ports are formed on the side plate, and one can be connected to one chamber.

According to the third and fourth embodiments of the present invention, the partition plate extends radially outward from the central axis of the silencer and may include a convex curved surface in the circumferential direction. According to the third embodiment, at least two open ports may be formed on the side plate and connected to one chamber. According to the fourth embodiment, open ports may be formed on the side plate, and one of the open ports may be connected to one chamber.

According to a fifth embodiment of the present invention, the partition plate includes a first partition plate extending radially outward from the central axis of the silencer, a second partition plate protruding from the first partition plate and extending in a circumferential direction on one side, It may include a third partition plate that protrudes from the partition plate in an opposite direction to which the second partition plate extends and extends in a circumferential direction on the other side.

According to the sixth embodiment of the present invention, the silencer may include an outer plate extending from the outer end of the upper plate toward the lower plate, and an inner plate extending from the outer end of the lower plate toward the upper plate and disposed inside the outer plate. .

According to the seventh embodiment of the present invention, the open port may have a polygonal cross section when viewed from the outside in the radial direction.

According to the eighth aspect of the present invention, the opening port may be formed in a shape similar to a circle in cross section when viewed from the outside in the radial direction.

According to a ninth embodiment of the present invention, the cleaner includes a body housing having a discharge unit, a silencer disposed in the discharge unit and absorbing noise in a specific frequency range among noise generated from discharged air, and the silencer is based on a central axis. It includes a silencer housing having a chamber therein, and a partition plate disposed inside the silencer housing and partitioning the chamber into at least two chambers. The silencer housing includes a side plate formed along an outer circumferential surface and having a mesh structure having a plurality of through holes formed on at least a portion thereof.

The silencer according to the present invention includes a housing having a chamber therein, an open port formed in the housing and communicating the chamber with an external space, and a partition plate extending radially inward from a sidewall of the housing and dividing the chamber into at least two parts. includes The silencer absorbs noise in a specific frequency range among noises generated from air flowing on the outer circumferential surface of the housing.

Details of other embodiments are included in the detailed description and drawings.

According to the vacuum cleaner of the present invention, one or more of the following effects are provided.

First, a silencer using the Helmholtz resonator principle is provided. Even when the silencer is mounted on the cleaner body, the discharged air only flows along the outer circumferential surface of the silencer and does not pass through the sound absorbing material or silencer, so the air flow is not hindered and the vacuum cleaner operates. It has the advantage of maintaining performance.

Second, by comparing and adjusting the volume of the chamber inside the silencer, the cross-sectional area of the open port, and the length of the neck, it is possible to easily design a silencer that selectively absorbs noise in a specific frequency range.

Third, according to the prior art, the sound absorbing material has the disadvantage of not efficiently absorbing low-frequency noise, whereas it can efficiently absorb low-frequency noise by appropriately designing the volume of the chamber inside the silencer, the cross-sectional area of the open port, and the length of the neck. There are also advantages to being there.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a cleaner body according to the present invention;
Figure 2 is a view in which the cover is removed from Figure 1;
3 is a right side view of the cleaner body according to the present invention;
4 is a perspective view of a state in which the silencer according to the first embodiment and the silencer according to the second embodiment are coupled;
5 is a front view of a state in which the silencer according to the first embodiment and the silencer according to the second embodiment are coupled;
6 is an exploded perspective view of a silencer according to a first embodiment and a silencer according to a second embodiment of the present invention;
7 is a plan view of a silencer according to a first embodiment of the present invention;
8 is a plan view of a silencer according to a first embodiment of the present invention;
9 is a plan view of a silencer according to a second embodiment of the present invention;
10 is a schematic diagram showing the degree of noise absorption for each frequency when the silencer assembly in which the silencer according to the first embodiment and the silencer according to the second embodiment are coupled is mounted;
11 is a view comparing noise generated from a vacuum cleaner with the prior art when a silencer assembly in which a silencer assembly according to the first embodiment and a silencer according to the second embodiment are coupled is mounted;
12 is a view showing the silencer according to the first embodiment of the present invention at various heights;
13 is a cross-sectional plan view of a silencer according to the third and fourth embodiments of the present invention;
14 is a view showing a silencer according to a fifth embodiment of the present invention;
15 is a view showing a silencer according to a sixth embodiment of the present invention;
16 is a view showing a silencer according to a seventh embodiment of the present invention;
17 is a view showing a silencer according to an eighth embodiment of the present invention;
18 is a view showing a silencer according to a ninth embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Hereinafter, the present invention will be described with reference to drawings for explaining a vacuum cleaner according to embodiments of the present invention.

1 is a perspective view of a cleaner body 2 according to the present invention, FIG. 2 is a perspective view of the cleaner body 2 after removing the cover surrounding the silencer 80 in FIG. 1, and FIG. 3 is a silencer ( 80) is a right side view of the cleaner body 2 after removing the cover surrounding it.

Referring to FIGS. 1 to 3 , the cleaner 1 according to the present invention includes a main body 2 . The main body 2 includes a suction part 10 through which air containing dust is sucked.

A direction on one side where the suction part 10 is located based on the longitudinal axis A1 of the suction part 10 is defined as a forward direction. Based on the main body 2 shown in FIG. 1, the upper part is defined as the upper part, and the lower part is defined as the lower part.

The main body 2 is externally formed by the housing 3 .

The suction part 10 is coupled to the front of the body housing 3.

A discharge unit 20 is disposed on one side of the body housing 3 . The discharge unit 20 is a component through which air introduced through the suction unit 10 is discharged to the outside of the cleaner main body 2 . The discharge part 20 is formed on the upper surface of the body housing 3. The discharge unit 20 may be formed in a ring shape around an imaginary line extending in the vertical direction.

A dust container 60 is coupled to the front of the body housing 3. An opening is formed at a joint between the body housing 3 and the dust container 60, and the body housing 3 and the dust container 60 communicate with each other.

A battery 50 is coupled to the lower portion of the body housing 3. The battery 50 supplies power to the body.

At the upper end of the handle 40, the control unit 70 is disposed. The control unit 70 is a component that receives a user's command. The control unit 70 is composed of at least one or more buttons.

The main body 2 may further include a suction motor (not shown) and a cyclone unit (not shown).

The handle 40 is a component that enables the user to move the cleaner 1 by gripping it. The handle 40 is disposed on the opposite side of the suction part 10 based on the dust container 50 . The handle 40 has a substantially cylindrical shape and has a longitudinal axis A2. In addition, the handle 40 may be disposed in a form in which an upper portion is inclined toward the front.

The battery 50 is a component for supplying power to a suction motor (not shown) disposed inside the main body 2 . The battery 50 may be disposed to be adjacent to the handle 40 on the upper side, and may be disposed to be adjacent to a lower portion of the outer circumferential surface of the dust bin 60 to be described later in the front.

The main body 2 further includes a dust container 60 for storing dust separated from the introduced air. The dust bin 60 may be formed in a cylindrical shape centered on a central axis.

The silencer 80 is a component that absorbs noise in a specific frequency range among noises generated in air discharged from the cleaner body 2 .

The silencer 80 may be detachably mounted on the cleaner body 2 . Referring to FIGS. 1 and 3 , a cap may be disposed on the discharge unit 20 of the cleaner. Referring to FIG. 1 , the cap is directly coupled to the discharge unit 20 when the silencer 80 is not mounted. Referring to FIG. 3 , the cap may be coupled to the silencer 80 when the silencer 80 is mounted. By having this arrangement, the silencer 80 can be additionally mounted to the conventional cleaner body 2 after being manufactured separately from the cleaner body 2 .

The silencer housing forms the exterior of the silencer 80 and forms a space inside.

The silencer housing is arranged relative to the central axis. The central axis is disposed parallel to the direction in which air is discharged from the discharge unit 20 . That is, referring to FIG. 5 , the central axis may be arranged in a vertical direction.

The silencer housing is formed in a cylindrical shape. A cross section of the silencer housing is formed in a circular shape around a central axis. The silencer housing is elongated in the direction of the central axis.

Hereinafter, the radial direction and the circumferential direction are defined based on the central axis of the muffler.

The silencer housing has a chamber inside. At least two or more chambers are formed by the partition plate 86. While the chamber is partitioned by the partition plate 86, the volume X is changed.

The silencer housing may be composed of an upper plate 81, a lower plate 82, and a side plate 83. The top plate 81 is disposed on the upper surface of the silencer housing and is formed in a disk shape. The lower plate 82 is disposed on the lower surface of the silencer housing and is formed in a disk shape. The upper plate 81 and the lower plate 82 face each other and are disposed in parallel. The side plate 83 is disposed on the outer circumferential surfaces of the upper plate 81 and the lower plate 82 and extends in the vertical and circumferential directions.

The open port 85 constitutes a passage through which sound waves pass. An open port 85 is formed on one side of the silencer housing and communicates the chamber with the external space.

An open port 85 is formed in the silencer housing. More specifically, the opening port 85 is formed on the side plate 83.

The open port 85 penetrates in the radial direction and communicates a chamber located inside the side plate 83 with an external space.

The open port 85 is disposed upstream relative to the air discharge direction. In other words, referring to FIG. 5 , the opening port 85 is disposed closer to the lower plate 82 than to the upper plate 81 .

A plurality of open ports 85 are formed in the circumferential direction. The number of open ports 85 may be different for each embodiment.

The shape of the cross section of the opening port 85 may be different for each embodiment.

The partition plate 86 is disposed inside the silencer housing and partitions the silencer housing into at least two chambers.

The partition plate 86 extends radially outward from the central axis. In other words, the partition plate 86 extends radially inward from the side plate 83 .

An inner end of the partition plate 86 may be connected to the frame 84 . If the silencer 80 does not have the frame 84, the inner end of one partition plate 86 is connected to the inner end of the other partition plate 86.

The shape of the partition plate 86 may be different for each embodiment.

Hereinafter, the principle of the Helmholtz resonator will be described.

The silencer 80 absorbs noise in a specific frequency range among noises generated in the air, and the specific frequency means a resonant frequency in the Helmholtz resonator, which is the volume of the chamber, the cross-sectional area of the open port 85, or the open port ( 85) is determined by at least one of the distances (neck length) to the inlet end of the chamber.

The formula for determining the specific frequency is as follows.

The variables of the above formula are as follows.

Rf - Resonant frequency

C - Velocity of a sound wave

D - Diameter of cross section of open port

L - Neck Length

V - Volume of the chamber

Among the variables mentioned above, the cross-sectional diameter of the open port 85 is related to the cross-sectional area of the open port.

The neck length is defined as the distance from the open port 85 to the inlet end of the chamber.

The volume of the chamber is the volume of each chamber partitioned by the partition plate 86.

That is, the specific frequency increases as the volume of the chamber decreases, increases as the cross-sectional area of the open port 85 increases, and increases as the neck length decreases.

For example, the silencer 80 absorbing noise in a specific low frequency region can be designed by increasing the volume of the chamber, reducing the cross-sectional area of the open port 85, or lengthening the neck length. Since this silencer 80 efficiently absorbs low-frequency noise, it exhibits more advanced performance than the silencer 80 according to the prior art.

Among the noise contained in the air, the phase of sound waves in a specific frequency range is changed inside the Helmholtz resonator. The phase-changed sound wave cancels out the sound wave included in the air, so noise in a specific frequency range is removed.

10 is a diagram briefly showing the degree of noise absorption for each frequency when a silencer assembly in which a silencer 80a according to the first embodiment and a silencer 80b according to the second embodiment are mounted are mounted, 11 is a diagram comparing noise generated from a vacuum cleaner with the prior art when a silencer assembly in which a silencer 80a according to the first embodiment and a silencer 80b according to the second embodiment are mounted is mounted.

Referring to FIG. 10 , it can be seen that among the noise present in the air, sound waves having a frequency between 1 kHz and 1.4 kHz are removed by the silencer 80a according to the first embodiment. In addition, it can be seen that sound waves having a frequency between 2.2 kHz and 2.8 kHz are removed by the silencer 80b according to the second embodiment.

Referring to FIG. 11, when the silencer 80 according to the present invention is mounted, among the noise generated from the cleaner body 2, the noise generated in the 1kHz to 1.4kHz and 2.2kHz to 2.8kHz bands is smaller than that of the prior art. The effect of losing appears.

In general, among the frequencies of noise generated by handheld vacuum cleaners, the frequencies that have the greatest impact on the human body are mainly formed in the 1kHz to 1.4kHz and 2.2kHz to 2.8kHz bands. The vacuum cleaner equipped with the silencer 80 according to the present invention It has the effect of greatly reducing the degree of discomfort felt by the user during operation.

Hereinafter, the shape of the silencer 80 for each embodiment will be described.

A silencer 80a according to the first embodiment will be described with reference to FIGS. 4 to 8 .

In the silencer 80a according to the first embodiment, the partition plate 86a extends straight in the radial direction.

The frame 86a is disposed in the center of the chamber and extends in the longitudinal direction of the central axis of the silencer 80a.

The frame 84a is formed in a cylindrical shape. The frame 84a extends in the longitudinal direction of the central axis. The upper end of the frame 84a is connected to the upper plate 81a, and the lower end of the frame 84a is connected to the lower plate 82a. An outer circumferential surface of the frame 84a forms an inner circumferential surface of the chamber.

In the silencer 80a, at least a part of the inner surface of the lower plate 82a protrudes upward. The center of the lower plate 82a is disposed above the outer end.

The side plate 83a is disposed outside the outer end of the lower plate 82a. The shortest distance from the central axis to the upper end of the open port 85a may be longer than the shortest distance from the central axis to the lower end of the open port 85a.

At least two open ports 85a are formed on the side plate 83a and are connected to one chamber.

The cross section of the open port 85a according to the first embodiment may be formed in a rectangular shape. At this time, the cross-sectional area (Ya) of the open port is equal to the width (Wa) multiplied by the height (Ha). However, the cross-sectional shape of the open port 85a according to the first embodiment is not limited to the above, and the method of obtaining the cross-sectional area Ya of the open port may also be different.

The open port 85a may have a wide left and right width Wa and a short top and bottom height Ha.

The neck length (Za) may be the same as the width (Da) of the open port.

A plurality of open ports 85a are formed in the circumferential direction. At this time, two or more open ports 85a are connected to one chamber, and sound waves are introduced from the two or more open ports 85a to cause interference with each other.

When two or more open ports 85a are connected to one chamber, at least one chamber may be disposed adjacent to the partition plate 86a.

The partition plate 86a according to the first embodiment may be formed as a flat plate. The partition plate 86a extends in a straight line in the radial direction.

Referring to FIGS. 7 and 8 , three partition plates 86a may be installed, and accordingly, three chambers may be configured. However, it is not limited thereto, and the installed number of partition plates 86a may vary.

The silencer 80b according to the second embodiment will be described with reference to FIGS. 4 to 6 and FIG. 9 . The silencer 80b according to the second embodiment may be used as long as it does not conflict with the silencer 80a according to the first embodiment described above. Hereinafter, the silencer 80b according to the second embodiment will be described, focusing on differences from the silencer 80a according to the first embodiment.

In the silencer 80b according to the second embodiment, the partition plate 86b extends straight in the radial direction, and the inner space of the silencer 80b is partitioned into more chambers than in the first embodiment.

An open port 85b according to the second embodiment is formed on the side plate 83b, and one open port 85b is connected to one chamber.

One end of the open port 85b may be disposed in contact with an outer end of one partition plate 86b. The other end of the open port 85b may be spaced apart from the outer end of the other partition plate 86b.

The frequency domain absorbed by the silencer 80b according to the second embodiment may be higher than the frequency domain absorbed by the silencer 80b according to the first embodiment.

Referring to FIG. 12 , the height of the silencer 80 may be changed. The height of the silencer 80 in FIG. 12A is the highest, and the height of the silencer 80 in FIG. 12C is the lowest. By having such an arrangement, the volume (X) of the chamber can be designed differently, and accordingly, the frequency range for absorption is different. For example, the specific frequency absorbed by the silencer 80 shown in FIG. 12A may be in a lower frequency region than the specific frequency absorbed by the silencer 80 shown in FIG. 12C.

A silencer 80c according to a third embodiment will be described with reference to FIG. 13A. The silencer 80c according to the third embodiment may be used as long as it does not conflict with the silencer 80a according to the first embodiment described above. Hereinafter, the silencer 80c according to the third embodiment will be described, focusing on differences from the silencer 80a according to the first embodiment.

In the silencer 80c according to the third embodiment, the partition plate 86c extends to have a curved surface. The partition plate 86c extends radially outward from the central axis of the silencer 80c and includes a convex curved surface in the circumferential direction.

Referring to FIG. 13A , the silencer 80c according to the third embodiment may include four partition plates 86c and four chambers.

The open port 85b may be formed at an outer end of the partition plate 86c. More specifically, the open port 85b may come into contact with the outer end of the concave surface of the partition plate 86c. Thus, sound waves introduced into the chamber can be diffused along the concave surface of the partition plate 86c.

A plurality of partition plates 86c are disposed along the circumferential direction, and form a convex curved surface along either a clockwise or counterclockwise direction. Taking Fig. 13A as an example, the partition plate 86c forms a convex curved surface in a counterclockwise direction. By having this arrangement, the volumes Xc of each chamber can all be the same.

A silencer 80d according to a fourth embodiment will be described with reference to FIG. 13B. The silencer 80d according to the fourth embodiment may be used as long as it does not conflict with the silencer 80c according to the above-described first embodiment 80a to the third embodiment. Hereinafter, the silencer 80d according to the fourth embodiment will be described, focusing on differences from the above-mentioned other silencers.

In the silencer 80d according to the fourth embodiment, the partition plate 86d is extended to have a curved surface, and the inner space of the silencer 80d is partitioned into more chambers than in the third embodiment.

The open port 85d is formed on the side plate 83d, and one open port 85d may be connected to one chamber.

The frequency domain absorbed by the silencer 80d according to the fourth embodiment may be a higher frequency domain than the frequency domain absorbed by the silencer 80d according to the third embodiment.

Referring to Fig. 14, a silencer 80e according to a fifth embodiment will be described. The silencer 80e according to the fifth embodiment may be used as long as it does not conflict with the silencer 80a according to the first embodiment to the silencer 80d according to the fourth embodiment. Hereinafter, the silencer 80e according to the fifth embodiment will be described, focusing on differences from the silencer 80a according to the first embodiment to the silencer 80d according to the fourth embodiment.

In the silencer 80e according to the fifth embodiment, the partition plate protrudes in the circumferential direction, so that the structure of the chamber can be deformed. More specifically, the chamber may be formed in a labyrinthine structure.

According to the fifth embodiment, the partition plate includes a first partition plate 86e to a third partition plate 88e.

The first partition plate 86e extends radially outward from the central axis of the silencer 80e.

The first partition plate 86e may extend flatly in the radial direction similarly to the first embodiment. Alternatively, the first partition plate 86e may be extended while forming a curved surface similarly to the third embodiment.

The second partition plate 87e protrudes from the first partition plate 86e and extends in a circumferential direction on one side. Taking FIG. 14 as an example, the second partition plate 87e may extend in a clockwise direction (CW).

The third partition plate 88e protrudes from the first partition plate 86e in the direction opposite to the extension of the second partition plate 87e, and extends in the other circumferential direction. Taking FIG. 14 as an example, the third partition plate 88e may extend in a counterclockwise direction (CCW).

At least a portion of the second partition plate 87e and the third partition plate 88e may overlap each other in a radial direction.

The second partition plate 87e may be disposed radially inward from the third partition plate 88e.

The open port 85e may be disposed in contact with an outer end of the first partition plate 86e. In this case, the opening port 85e may overlap the second partition plate 87e, but may not overlap the third partition plate 88e in the radial direction. Conversely, the open port 85e may overlap with the third partition plate 88e, but may not overlap with the second partition plate 87e.

The structure of the chamber of the silencer 80e according to the fifth embodiment is different due to the second partition plate 87e and the third partition plate 88e, and is different from the chamber of the silencer 80a according to the first embodiment. It can have a frequency domain.

Referring to Fig. 15, a silencer 80f according to a sixth embodiment will be described. The silencer 80f according to the sixth embodiment may be used as long as it does not conflict with the silencer 80a according to the first embodiment to the silencer 80d according to the fourth embodiment. Hereinafter, the silencer 80f according to the sixth embodiment will be described, focusing on differences from the silencer 80a according to the first embodiment to the silencer 80d according to the fourth embodiment.

In the silencer 80f according to the sixth embodiment, the side plate may be composed of an inner plate 84f and an outer plate 83f. Accordingly, the neck length Zf may be changed.

The outer plate 83f extends from the outer end of the upper plate 81f toward the lower plate 82f. The inner plate 84f extends from the outer end of the lower plate 82f toward the upper plate 81f and is disposed inside the outer plate 83f.

The outer plate 83f extends vertically toward the lower plate 82f. Alternatively, the inner plate 84f extends toward the top plate 81f and may be inserted and extended toward the inner side. Accordingly, the upper end of the inner plate 84f is disposed inward than the lower end of the inner plate 84f. Further, the horizontal distance between the upper end of the inner plate 84f and the outer plate 83f is longer than the horizontal distance between the inner plate 84f and the lower end of the outer plate 83f.

The inner plate 84f extends toward the top plate 81f and may extend while forming a curved surface.

The outer plate 83f is spaced apart from the lower plate 82f, and the inner plate 84f is spaced apart from the upper plate 81f. Sound waves flow into the gap between the lower end of the outer plate 83f and the lower plate 82f, and travel upward. Sound waves are introduced into the chamber through the gap between the upper end of the inner plate 84f and the upper plate 81f.

A silencer 80f according to the sixth embodiment includes a frame 84f. The frame 84f is disposed on the central axis, the upper end is connected to the upper plate 81f, and the lower plate 82f is connected to the lower end.

The silencer 80f includes at least two partition plates 87f, and an open port 85f extends from one partition plate 87f to the other partition plate 87f. Accordingly, the cross-sectional area Yf of the open port 85f is the area formed by one partition plate 87f - the outer end of the lower plate 82f - the other partition plate 87f - the lower end of the outer plate 83f can be

The partition plate 87f according to the sixth embodiment can extend flatly in the radial direction similarly to the first embodiment. Alternatively, this and the dilly partition plate 87f may be extended while forming a curved surface similarly to the third embodiment.

The neck length Zf of the silencer 80f according to the sixth embodiment can be defined as the distance from the lower end of the outer plate 83f to the upper end of the inner plate 84f. Accordingly, the neck length Zf of the silencer 80f according to the sixth embodiment may be set longer than the neck length of the silencer according to other embodiments. Therefore, it is possible to absorb noise of a lower specific frequency than other silencers under the same conditions.

Referring to Fig. 16, a silencer 80g according to a seventh embodiment will be described. The silencer 80g according to the seventh embodiment may be used as long as it does not conflict with the silencer 80a according to the first embodiment to the silencer 80f according to the sixth embodiment. Hereinafter, the silencer 80g according to the seventh embodiment will be described, focusing on differences from the silencer 80a according to the first embodiment to the silencer 80f according to the sixth embodiment.

The open port 85g according to the seventh embodiment has a polygonal cross section when viewed from the outside in the radial direction. More specifically, the open port 85g has a width Wg in the circumferential direction narrower than a height Hg in the central axial direction of the silencer 80g.

An upper end of the open port 85g may be disposed adjacent to the upper plate 81g, and a lower end of the open port 85g may be disposed adjacent to the lower plate 82g.

A silencer 80h according to an eighth embodiment will be described with reference to FIG. 17 . The silencer 80h according to the eighth embodiment may be used as long as it does not conflict with the silencer 80a according to the first embodiment to the silencer 80f according to the sixth embodiment. Hereinafter, the silencer 80h according to the eighth embodiment will be described, focusing on differences from the silencer 80a according to the first embodiment to the silencer 80f according to the sixth embodiment.

The opening port 85h is formed in a shape similar to a circle in cross section when viewed from the outside in the radial direction. The open port 85h may be spaced apart from the upper plate 81h by a predetermined distance or more, and may be spaced apart from the lower plate 82g by a predetermined distance or more. In this case, the distance between the open port 85h and the upper plate 81h may be longer than the distance between the open port 85h and the lower plate 82g.

Referring to Fig. 18, a silencer 80i according to a ninth embodiment will be described. The silencer 80i according to the ninth embodiment may be used as long as it does not conflict with the silencer 80a according to the first embodiment to the silencer 80f according to the sixth embodiment. Hereinafter, the silencer 80i according to the ninth embodiment will be described, focusing on differences from the silencer 80a according to the first embodiment to the silencer 80f according to the sixth embodiment.

According to the ninth embodiment, the silencer 80i may not have a separate open port. Instead, one side wall of the silencer 80i may be formed in a mesh structure to allow sound waves to pass through.

The side plate 84i is formed along an outer circumferential surface, and a mesh structure in which a plurality of through holes are formed is formed on at least one part. A plurality of fine holes may be formed in the side plate 84i.

Referring to FIG. 18A , a mesh structure may be formed on a portion of the side plate 84i. In this case, the mesh structure may be formed adjacent to the lower plate 82i but separated from the upper plate 81i by a predetermined distance or more.

Unlike the silencer 80i shown in FIG. 18A, referring to FIG. 18B, the mesh structure may be formed on the entire side plate 84i.

Hereinafter, effects according to the present invention will be described.

The silencer 80 according to the present invention includes a housing having a chamber therein. In addition, the silencer 80 is formed on the housing and includes an open port 85 communicating the chamber with an external space. In addition, the silencer 80 extends radially inward from the sidewall of the housing and includes a partition plate 87 dividing the chamber into at least two chambers.

The silencer 80 absorbs noise in a specific frequency range among noises generated from air flowing on the outer circumferential surface of the housing. The frequency of noise absorbed by the silencer 80 follows the Helmholtz resonator principle. More specifically, the frequency range of the noise absorbed by the silencer 80 is determined by the volume of the chamber (X), the cross-sectional area of the open port (Y), or the distance from the open port to the inlet end of the chamber (Z, neck length) do.

According to the present invention, since the above-mentioned silencer 80 is installed in the vacuum cleaner, flow resistance due to the sound absorbing material does not occur and the performance of the cleaner does not deteriorate, and low frequency noise that is difficult to be absorbed by the sound absorbing material can be removed. have.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications and implementations are possible by those skilled in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

1: cleaner 2: cleaner body
3: body housing
10: suction part 20: discharge part
30: handle 40: battery
50: dust bin 60: filter
70: control panel 80: silencer
80a: Silencer 81a: Top plate
82a: lower plate 83a: side plate
84a: frame 85a: open port
86a: partition plate
80b: silencer 81b: top plate
82b: lower plate 83b: side plate
84b: frame 85b: open port
86b: partition plate
80c: Silencer 81c: Top plate
82c: lower plate 83c: side plate
85c: open port 86c: partition plate
80d: silencer 81d: top plate
82d: lower plate 83d: side plate
85d: open port 86d: partition plate
80e: Silencer 81e: Top plate
82e: lower plate 83e: side plate
84e: frame 85e: open port
86e: first partition plate 87e: second partition plate
88e: third partition plate
80f: Silencer 81f: Top plate
82f: lower plate 83f: outer plate
84f: inner plate 85f: frame
86f: open port 87f: partition plate
80g: silencer 81g: top plate
82g: lower plate 83g: side plate
84g: frame 85g: open port
86g: partition plate
80h: silencer 81h: top plate
82h: lower plate 83h: side plate
84h: frame 85h: open port
86h: partition plate
80i: silencer 81i: top plate
82i: lower plate 83i: side plate
84i: frame 85i: open port
86i: partition plate
A1: Longitudinal axis of suction part A2: Longitudinal axis of handle
A3: central axis of silencer
X: volume of chamber Y: cross-sectional area of open port Z: length of neck
W: width D: depth H: height

Claims (19)

Body housing having a discharge unit;
A silencer disposed in the discharge unit and absorbing noise in a specific frequency range among noises generated in the discharged air;
the silencer,
A silencer housing arranged on the basis of a central axis and having a chamber therein;
an open port formed on one side of the silencer housing and communicating the chamber with an external space;
A cleaner comprising: a partition plate disposed inside the silencer housing and partitioning the chamber into at least two chambers. According to claim 1,
The specific frequency,
The vacuum cleaner determined by at least one of the volume of the chamber, the cross-sectional area of the open port, and the distance from the open port to the inlet end of the chamber. According to claim 1,
the silencer,
A frame disposed in the center of the chamber and extending in the longitudinal direction of the central axis of the silencer; includes,
The partition plate extends radially outward from the frame. According to claim 3,
the silencer,
A vacuum cleaner in which at least a portion of an inner surface of the lower plate protrudes upward. According to claim 4,
The open port,
A vacuum cleaner formed on a side plate and connected to at least two chambers. According to claim 4,
The open port,
A vacuum cleaner formed on a side plate and connected to one chamber. According to claim 1,
The partition plate,
Extending outward in the radial direction from the central axis of the silencer,
A vacuum cleaner comprising a convex curved surface in the circumferential direction. According to claim 7,
The partition plate,
A plurality of them are arranged along the circumferential direction,
A vacuum cleaner that forms a convex curved surface along either a clockwise or counterclockwise direction. According to claim 1,
The partition plate,
a first partition plate extending radially outward from the central axis of the silencer;
A cleaner comprising: a second partition plate protruding from the first partition plate and extending in a circumferential direction on one side. According to claim 9,
The partition plate,
and a third partition plate that protrudes from the first partition plate in an opposite direction to which the second partition plate extends and extends in a circumferential direction on the other side. According to claim 1,
the silencer,
an outer plate extending from the outer end of the upper plate toward the lower plate;
A cleaner comprising: an inner plate extending from an outer end of the lower plate toward the upper plate and disposed inside the outer plate. According to claim 11,
The outer plate is disposed spaced apart from the lower plate,
The inner plate is disposed to be spaced apart from the top plate. According to claim 11,
The silencer includes at least two partition plates,
The opening port extends from the one partition plate to the other partition plate. According to claim 1,
The open port,
A vacuum cleaner with a polygonal cross section when viewed from the outside in the radial direction. According to claim 14,
The open port,
A vacuum cleaner having a width in a circumferential direction narrower than a height in a central axis direction of the muffler. According to claim 1,
The open port,
A vacuum cleaner whose cross section is formed in a shape similar to a circle when viewed from the outside in the radial direction. According to claim 1,
the silencer,
a first silencer for absorbing noise in a first frequency range among the noise; And a second silencer for absorbing noise in a second frequency region among the noise;
The first silencer and the second silencer are coupled to each other in a central axis direction. Body housing having a discharge unit;
A silencer disposed in the discharge unit and absorbing noise in a specific frequency range among noises generated in the discharged air;
the silencer,
A silencer housing arranged on the basis of a central axis and having a chamber therein; and
A partition plate disposed inside the silencer housing and partitioning the chamber into at least two parts,
The silencer housing,
A cleaner comprising: a side plate formed along an outer circumferential surface and having a mesh structure having a plurality of through holes formed on at least a portion thereof. a housing having a chamber therein;
an open port formed in the housing and communicating the chamber with an external space;
A partition plate extending radially inward from the sidewall of the housing and partitioning the chamber into at least two parts;
A silencer for absorbing noise in a specific frequency range among noises generated from air flowing on an outer circumferential surface of the housing.

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