CN211093772U - Dust collector and air outlet filtering piece thereof - Google Patents

Abstract

The utility model relates to a dust catcher and air-out filter piece thereof. The air outlet filtering piece comprises a main body, a first noise reduction piece and a second noise reduction piece. An air outlet cavity is formed in the main body, an air inlet and an air outlet are formed in the main body, and the air inlet, the air outlet cavity and the air outlet are communicated in sequence. The first piece of making an uproar of falling is located the intracavity of giving vent to anger, including a plurality of portions of making an uproar of once making an uproar, a plurality of portions of making an uproar of once making an uproar set up along the intracavity air current flow direction interval of giving vent to anger, and a plurality of portions of making an uproar of once making an uproar all are located air current flow path. The second noise reduction piece is connected to the air outlet in a matching mode and comprises a secondary noise reduction part, and a plurality of noise reduction channels communicated with the air outlet cavity are formed in the secondary noise reduction part. The utility model provides a dust catcher and air outlet department that goes out air filter piece thereof have lower noise.

Description

Dust collector and air outlet filtering piece thereof

Technical Field

The utility model relates to an intelligence technical field especially relates to a dust catcher and air-out filters piece thereof.

Background

In the prior art, a power assembly and an air outlet filter are generally arranged in the dust collector. Under the action of the power assembly, the airflow flows into the dust collector and is discharged from the air outlet after being filtered by the air outlet filter element. However, the power assembly may also emit sound waves when operating, which are propagated by the flow of the air flow and form a loud noise at the air outlet, resulting in a poor user experience. Therefore, how to reduce the noise at the air outlet of the dust collector becomes an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide a vacuum cleaner and an air outlet filter member capable of reducing noise at an air outlet of the conventional vacuum cleaner, in order to solve the problem of high noise at the air outlet.

An air outlet filter, comprising:

a main body having an air outlet cavity formed therein; the main body is provided with an air inlet hole and an air outlet, and the air inlet hole, the air outlet cavity and the air outlet are communicated in sequence;

the first noise reduction part is arranged in the air outlet cavity and comprises a plurality of primary noise reduction parts, the primary noise reduction parts are arranged at intervals along the airflow flowing direction in the air outlet cavity, and the primary noise reduction parts are all positioned on the airflow flowing path; and

and the second noise reduction piece is matched and connected with the air outlet and comprises a secondary noise reduction part, and a plurality of noise reduction channels communicated with the air outlet cavity are formed in the secondary noise reduction part.

In one embodiment, any two adjacent primary noise reduction parts are arranged along the circumferential direction and/or the axial direction of the main body in a staggered manner.

In one embodiment, projections of two adjacent primary noise reduction parts which are randomly staggered on the plane where the air outlet is located cover the air outlet together.

In one embodiment, each of the primary noise reducers extends in a radial direction of the main body.

In one embodiment, the first noise reduction part further includes a support frame, the support frame is disposed on a cavity wall of the air outlet cavity, and the plurality of primary noise reduction parts are mounted on the support frame.

In one embodiment, the supporting frame includes a supporting bottom plate and a plurality of supporting rods extending along the axial direction of the main body, the plurality of supporting rods are arranged at intervals along the circumferential direction of the supporting bottom plate, and the plurality of primary noise reduction parts are fixed to the supporting rods.

In one embodiment, the second noise reduction member includes a mounting frame coupled to the air outlet, the mounting frame has a first end surface adjacent to the air outlet and a second end surface far from the air outlet along the axial direction of the main body, and the plurality of noise reduction channels penetrate through the first end surface and the second end surface.

In one embodiment, the aperture of each noise reduction channel gradually increases from the first end face to the second end face.

In one embodiment, the mounting frame is provided with a turn buckle at the periphery.

In one embodiment, an operating handle is disposed on the second end face of the mounting frame.

In one embodiment, the body is a filter.

A vacuum cleaner, comprising:

the dust cup assembly comprises an air exhaust main body, and an air exhaust cavity is formed in the air exhaust main body; and

above-mentioned air-out filter, air-out filter connect in the exhaust intracavity, the passageway and the outside intercommunication of making an uproar fall.

When the dust collector and the air outlet filter piece work, air flow flows into the air outlet cavity from the air inlet and flows out from the air outlet. At the same time, the sound waves generated by the power assembly follow the flow of the air flow in a radial direction. Because a plurality of noise reduction portion of once setting up along the intracavity air current flow direction interval of giving vent to anger, and a plurality of noise reduction portion of once all are located the air current flow path, consequently, the in-process of sound wave propagation in the intracavity of giving vent to anger, the chamber of giving vent to anger will constantly strike with a plurality of noise reduction portion of once for the momentum of sound wave weakens. Furthermore, part of the sound waves may also be reflected during contact with the primary noise reducer to reduce the amount of sound waves that diffuse from the air outlet. Furthermore, the secondary noise reduction part is connected to the air outlet in a matching mode, and the shielding area of the air outlet can be increased, so that when sound waves diffuse from the air outlet, the sound waves can collide with the secondary noise reduction part, and momentum and quantity of the sound waves are further attenuated and then are discharged to the outside from the noise reduction channel. Through the sheltering from of the primary noise reduction part and the secondary noise reduction part, the momentum and the quantity of sound waves are weakened, so that the noise is reduced.

Drawings

FIG. 1 is a front sectional view of a vacuum cleaner according to an embodiment of the present invention;

FIG. 2 is a side cross-sectional view of an embodiment of the present invention, taken in one direction;

FIG. 3 is a side cross-sectional view of the vacuum cleaner in another orientation in accordance with an embodiment of the present invention;

fig. 4 is a schematic structural view of an air outlet filter member according to an embodiment of the present invention;

fig. 5 is a top view of the air outlet filter shown in fig. 4;

FIG. 6 is a cross-sectional view of the outlet filter of FIG. 5 taken along the line A-A;

FIG. 7 is a cross-sectional view of the outlet filter of FIG. 5 taken along the line B-B;

fig. 8 is a schematic structural view of an air outlet filter member in one direction according to an embodiment of the present invention;

fig. 9 is a schematic structural view of an air outlet filter member in another direction according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present invention provides a vacuum cleaner 100, which includes a dirt cup assembly 10, a power assembly 20, an electricity supply assembly 30, and a handle 40. The power assembly 20 is electrically connected to the power supply assembly 30, and the power assembly 20 generates a negative pressure suction force in the dust cup assembly 10 under the driving of the power supply assembly 30, so that the air in the external environment forms an air flow into the dust cup assembly 10. The dirt cup assembly 10 is adapted to filter an airflow carrying dirt and debris and to re-discharge the filtered, cleaned airflow into the environment. The handle 40 is connected between the power module 20 and the power supply module 30 and is easily held by a user.

The dust cup assembly 10 includes a dust cup body 11, a primary separating part 13, a dust-air separating part 15, an exhaust body 17, and an exhaust filter 19. Specifically, the main body 11 has a hollow cylindrical structure with an assembling opening 110 at one end, and includes a top wall 112, a side wall 114 extending from the edge of the top wall 112 in the same direction, and a bottom wall 116, wherein the assembling opening 110 is opened in the bottom wall 116. The side walls 114 surround the top wall 112 and together with the top wall 112 and the bottom wall 116 form a dust collection chamber 118. An air inlet 1141 is formed in the middle of the sidewall 114, and the outside air enters the dust collecting chamber 118 through the air inlet 1141 of the main body of the dust cup under the action of negative pressure suction. The primary separating member 13, the dust-air separating member 15, and the air-discharging body 17 are housed in a dust collecting chamber 118, and the dust collecting chamber 118 is communicated with the primary separating member 13, the dust-air separating member 15, and the air-discharging body 17 in this order. The primary separating member 13 and the dust-air separating member 15 are used for separating dust and impurities in the airflow, and the filtered dust and impurities are deposited in the dust collecting chamber 118. The exhaust main body 17 has an exhaust cavity 170, two ends of the exhaust cavity 170 extend to the dust-air separating component 15 and the mounting port 110 respectively, and the air outlet filter 19 is coupled in the exhaust cavity 170, aligned with and communicated with the exhaust cavity 170 and the mounting port 110. The air outlet filter 19 is used for filtering the air flow, so that the clean air flow discharged from the air outlet filter 19 is cleaner. In addition, the air outlet filter 10 can also reduce noise of sound waves generated during the operation of the power assembly 20, so as to reduce noise emission of the vacuum cleaner 100.

It should be noted that, when air outlet filter 19 is fitted in air outlet cavity 170, it should be sealed to fitting opening 110 to prevent the air flow in air outlet cavity 170 from being exhausted from fitting opening 110 without being filtered by air outlet filter 19.

Referring to fig. 2 and 3, the air outlet filter 19 includes a main body 190, a first noise reduction element 192 and a second noise reduction element 194. The main body 190 is generally cylindrical with an air outlet 1901, and is used for providing a circulation environment for air flowing through the air outlet filter 19. The first noise reduction member 192 is accommodated in the main body 190, the second noise reduction member 194 is coupled to the air outlet 1901, and the first noise reduction member 192 and the second noise reduction member 194 are used for reducing noise of sound waves propagating in the main body 190.

Referring to fig. 4, specifically, an air outlet cavity 1903 is formed in the main body 190, and an air inlet and an air outlet 1901 are formed on the main body 190. The air inlet 1905, the air outlet chamber 1903 and the air outlet 1901 are sequentially communicated.

The intake vent 1905 communicates with the exhaust chamber 170, and the outlet vent 1901 is aligned with and communicates with the mounting port 110. The air flow in the air discharge chamber 170 flows into the air discharge chamber 1903 from the air inlet 1905, and is discharged to the outside from the air outlet 1901. During the flow of the airflow, the acoustic waves generated by the operation of the power assembly 20 propagate radially with the flow of the airflow. From this, it is understood that the propagation direction of the acoustic wave coincides with the airflow flow direction, and the propagation path of the acoustic wave coincides with the airflow flow path.

Referring again to fig. 2, 5 and 6, the first noise reducer 192 is disposed in the outlet chamber 1903 and includes a plurality of primary noise reducers 1921. The plurality of primary noise reducers 1921 are disposed at intervals along the airflow flowing direction in the outlet chamber 1903, and the plurality of primary noise reducers 1921 are all located on the airflow flowing path. Therefore, the sound wave continuously collides with the primary noise reducers 1921 while propagating in the outlet cavity 1903, so that the momentum of the sound wave is reduced. Also, a portion of the sound waves may also be reflected during contact with primary noise reducer 1921 to reduce the amount of sound waves diffusing from air outlet 1901. Since the magnitude of the noise at the air outlet 1901 is closely related to the momentum and the number of the sound waves. The smaller the momentum and number of sound waves, the lower the noise. Therefore, the first noise reducer 192 can reduce the noise of the sound wave once by providing the plurality of primary noise reducers 1921.

Referring to fig. 3, the second noise reduction member 194 is coupled to the air outlet 1901 and includes a secondary noise reduction portion 1941. The secondary noise reduction portion 1941 has a plurality of noise reduction channels 19410 formed therein and communicating with the outlet chamber 1903. The noise reduction passage 19410 is also communicated with the outside, and the air flow in the air outlet cavity is discharged to the outside through the noise reduction passage 19410.

The secondary noise reducing portion 1941 secondarily reduces noise of the sound wave. Specifically, the secondary noise reducer 1941 is coupled to the air outlet 1901, and the shielding area of the air outlet 1901 is increased, so that when the sound wave is diffused from the air outlet 1901, the sound wave may collide with the secondary noise reducer 1941, such that the momentum and the number of the sound wave are further attenuated and then discharged from the noise reduction passage 19410. Through the primary noise reduction part 1921 and the secondary noise reduction part 1941, primary noise reduction and secondary noise reduction can be performed on the sound waves, momentum and quantity of the sound waves are weakened, and noise reduction is facilitated.

Typically, the main body 190 is a filter, and the main body 190 is usually made of a filter material. Specifically, the main body 190 may be made of a filtering material with better mechanical strength, so that the main body 190 has a fixed shape after being molded. Alternatively, the main body 190 may be made of a soft filtering material, and the main body 190 covers the surface of the first noise reduction member 192 and is supported and molded by the first noise reduction member 192 and the second noise reduction member 194. The air inlet holes 1905 are filtering holes on the main body 190, and the air inlet holes 1905 have a plurality. The main body 190 is used for filtering the air flow in the air flow and then discharging the air flow from the air outlet 1901, so that the air flow discharged to the outside is cleaner.

The air outlet 1901 is disposed on an end surface or an outer wall of the main body 190 adjacent to the mounting opening 110, and the air inlet 1905 may be disposed on an outer wall or an end surface of the main body 190 far from the air outlet 1901.

Referring to fig. 4, in the present embodiment, the air inlet 1905 is disposed on an outer wall of the main body 190, and the air outlet 1901 is disposed on an end surface of the main body 190 away from the air inlet 1905.

Therefore, the air flow entering from the air inlet 1905 needs to be angularly adjusted in the flow direction before being discharged from the air outlet 1901. During the process of adjusting the angle of the airflow flowing direction, the propagation direction of the sound wave will change accordingly. The angle adjustment of the airflow flowing direction is mainly realized by the impact with the inner wall of the air outlet cavity 1903, the primary noise reduction part 1921 and the secondary noise reduction part 1941, and the larger the adjustment angle is, the higher the impact frequency is. Therefore, the air inlet 1905 is opened on the outer wall of the main body 190, and the air outlet 1901 is disposed on the end surface of the main body 190 away from the air inlet 1905, so as to ensure that the air flow and the sound wave have higher impact frequency with the inner wall of the air outlet cavity 1903, the primary noise reduction part 1921 and the secondary noise reduction part 1941, so that the sound wave discharged from the air outlet 1901 has smaller momentum and smaller quantity.

The primary noise reducer 1921 has a flat structure. The flat structure has a larger shielding surface, so that the airflow and the sound wave entering the air outlet cavity 1903 can effectively collide with the shielding surface.

Referring to fig. 2, fig. 6 and fig. 7 again, in the present embodiment, any two adjacent primary noise reducers 1921 are disposed along the circumferential direction and/or the axial direction of the main body 190 in a staggered manner.

Specifically, when any two adjacent primary noise reducers 1921 are disposed in a staggered manner along the circumferential direction of the main body 190, a spiral channel may be formed in the air outlet cavity, so that the air flow flows along a spiral path in the air outlet cavity. When any two adjacent primary noise reducers 1921 are arranged in a staggered manner along the axial direction of the main body 190, the airflow can flow along a serpentine path in the air outlet cavity. Alternatively, any two adjacent primary noise reducers 1921 may be provided in the outlet chamber so as to be offset in both the circumferential direction and the axial direction of the main body 190.

The path of the airflow propagating in the outlet cavity 1903 is more tortuous by the offset arrangement of any two adjacent primary noise reducers 1921 along the circumferential direction and/or the axial direction of the main body 190. Similarly, the path of the sound wave propagating in the air outlet cavity 1903 is also more tortuous, so as to increase the frequency of the impact of the sound wave with the primary noise reducers 1921. The sound waves impact the frequency of the increase, on the one hand, the attenuation degree of the sound wave momentum can be further deepened, and on the other hand, the number of the reflected sound waves can be increased, so that the noise at the air outlet 1901 can be reduced.

It should be noted that, in some other embodiments, the primary noise reducers 1921 may also be disposed in the air outlet cavity 1903 in a scattered manner without any distribution rule.

Further, projections of two primary noise reducers 1921 which are arbitrarily displaced and adjacently arranged on a plane where air outlet 1901 is located cover air outlet 1901 together.

Therefore, any two adjacent primary noise reducers 1921 have the largest blocking area on the propagation path of the acoustic wave. When the sound wave has hit one of the primary noise reducers 1921, the other primary noise reducer 1921 is necessarily located on the propagation path of the sound wave and blocks the sound wave for the next time. It can be seen that the acoustic wave can collide with each primary noise reducer 1921 located in the propagation direction thereof during propagation in the air outlet cavity 1903, so that the acoustic wave has the greatest momentum attenuation degree and the highest reflectivity.

Specifically, two adjacent primary noise reducers 1921 may have the same area, for example, two adjacent primary noise reducers 1921 may be semicircular plates, the two semicircular plates are disposed in a staggered manner with respect to the axis of the main body 190, and the projections of the two semicircular plates on the plane where the air outlets 1901 are located may or may not partially overlap each other. Alternatively, two adjacent primary noise reducers 1921 may have different areas, and for example, one of the primary noise reducers 1921 may be a fan-shaped plate, the other primary noise reducer 1921 may be a circular plate having a notch, and projections of the fan-shaped plate and the circular plate having the notch on a plane where the air outlet 1901 is located may be partially overlapped or not overlapped.

Further, each primary noise reducer 1921 extends in the radial direction of the main body 190.

Therefore, if the extending direction of the primary noise suppressor 1921 is perpendicular to the propagation direction of the acoustic wave in the outlet chamber 1903, the extending direction of the primary noise suppressor 1921 is also perpendicular to the propagation velocity direction of the acoustic wave. In the process of sound wave propagation, the maximum impact force is formed between the noise reduction part and the sound wave in sequence, so that the attenuation degree of the sound wave momentum is deepened, and the maximum reflection quantity is obtained.

It should be noted that in other embodiments, the extending direction of the primary noise reducer 1921 may also be disposed at an angle to the axis of the main body 190. Specifically, the included angle is greater than 0 ° and less than 90 °.

The first noise reducer 192 further includes a support frame 1923, the support frame 1923 is provided on a wall of the outlet chamber 1903, and the plurality of primary noise reducers 1921 are attached to the support frame 1923.

The support frame 1923 is used to support and mount a plurality of primary noise reducers 1921. Since the main body 190 has a semi-closed structure, the direct installation of the plurality of primary noise reducers 1921 in the outlet chamber 1903 has a great difficulty in operation. By arranging the supporting frame 1923, the plurality of primary noise reducers 1921 are fixed to the supporting frame 1923 in advance, then the supporting frame 1923 and the plurality of primary noise reducers 1921 are integrally assembled on the wall of the air outlet chamber 1903 from the air outlet 1901, and the supporting frame 1923 and the air outlet chamber 1903 are clamped, so that the first noise reducer 192 can be mounted and fixed. By providing the supporting frame 1923, the difficulty in mounting the primary noise reducing portions 1921 and the main body 190 can be reduced, and the assembling efficiency of the air outlet filter 19 can be improved.

In addition, the support frame 1923 also has a supporting function for the main body 190. In this embodiment, the main body 190 is a flexible filter, and the main body 190 covers the surface of the support frame 1923 and is supported by the support frame 1923.

Specifically, the support frame 1923 includes a support base plate 19230 and a plurality of support rods 19232 extending in the axial direction of the main body 190, the plurality of support rods 19232 are provided at intervals in the circumferential direction of the support base plate 19230, and the plurality of primary noise reducing portions 1921 are fixed to the support rods 19232.

The support base 19230 is configured to support and couple a plurality of support rods 19232. A plurality of support rods 19232 are spaced apart along the circumference of the support base 19230, and a gap is formed between two adjacent support rods 19232. Thus, air flow can enter the outlet chamber 1903 from the gaps between the support rods 19232 to facilitate the input of air flow.

It should be noted that, in some other embodiments, the supporting frame 1923 may also be a cylindrical structure, the primary noise reducers 1921 are disposed on an inner wall of the supporting frame 1923, a plurality of overflow holes are formed in an outer wall of the supporting frame 1923, and the plurality of overflow holes correspond to and are communicated with the plurality of air inlet holes 1905 in a one-to-one manner.

Referring again to fig. 3, 6 and 7, the second noise reducer 194 includes a mounting frame 1943 coupled to the air outlet 1901, the mounting frame 1943 has a first end surface 19430 adjacent to the air outlet 1901 and a second end surface 19432 away from the air outlet 1901 along the axial direction of the main body 190, and a plurality of noise reduction channels 19410 extend through the first end surface 19430 and the second end surface 19432.

The mounting frame 1943 is adapted to couple the secondary noise reducer 1941 to the air outlet 1901 such that the plurality of noise reduction channels 19410 are communicable with the air outlet cavity 1903. The first end surface 19430 coincides with a plane in which the air outlet 1901 lies.

Specifically, the mounting frame 1943 is a hollow cylindrical structure with two open ends, and the mounting frame 1943 may be fixed to the edge of the air outlet 1901 by a fastener, adhesion, or welding. In this particular embodiment, mounting frame 1943 is integrally formed with support frame 1923, making support frame 1923 and mounting frame 1943 simple to form and easy to manufacture.

Referring to fig. 8 and 9, the secondary noise reducer 1941 is fixed on the inner wall of the mounting frame 1943 and penetrates the first end surface 19430 and the second end surface 19432.

In this particular embodiment, the outer diameter of the secondary noise reducer 1941 gradually increases from the first end surface 19430 to the second end surface 19432 to facilitate the primary noise reducer 1921 being fitted into the mounting frame 1943 from the opening of the mounting frame 1943. Specifically, the primary noise reducer 1921 and the support frame 1923 may be connected by a fastener or may be integrally formed.

The secondary noise reduction portion 1941 may be a cylindrical structure, and a plurality of noise reduction channels 19410 may be juxtaposed on the secondary noise reduction portion 1941. Alternatively, the secondary noise reducing part 1941 includes a plurality of grid plates arranged in parallel and at intervals, both ends of each grid plate are connected with the inner wall of the mounting frame 1943, and two adjacent grid plates are arranged at intervals to form the noise reducing passage 19410. Alternatively, the secondary noise reducer 1941 is formed by splicing a plurality of criss-cross grid plates, and the noise reduction channels 19410 are grids on the grid plates. Noise reduction duct 19410 is configured to guide the airflow as it flows out of outlet filter 19 to the outside.

The diameter of each noise reduction channel 19410 increases from the first end surface 19430 to the second end surface 19432.

Therefore, the sound wave gradually increases in space in which the sound wave propagates as it passes through the noise reduction passage 19410. The larger the space, the larger the degree of diffusion of the sound wave, the smaller the concentration of the sound wave, and therefore, the smaller the noise generated at the air outlet 1901.

Referring to fig. 5 and 6, the mounting frame 1943 is provided with a rotating buckle 1945 at its periphery.

Correspondingly, the inner wall of the exhaust cavity 170 is provided with a slot, and the rotating buckle 1945 on the mounting frame 1943 can be engaged with the slot by rotating the air outlet filter 19. When the air outlet filter 19 needs to be detached, the air outlet filter 19 is rotated again. Through setting up spiral shell 1945 and draw-in groove for the installation of air-out filtration piece 19 is comparatively simple with the dismantlement.

Further, the turnbuckles 1945 are plural and are provided at intervals in the circumferential direction of the mounting frame 1943. Correspondingly, the clamping grooves are also multiple and correspond to the rotary buckles 1945 one by one. The arrangement of the plurality of turnbuckles 1945 and the clamping grooves can improve the installation stability of the air outlet filtering piece 19 so as to prevent the rotation of the air outlet filtering piece 19 relative to the air exhaust cavity 170.

An operating handle 1947 is provided on a second end surface 19432 of the mounting frame 1943.

A rotational force is applied to the operating handle 1947 so that the catch is engaged with or disengaged from the catch groove, to facilitate the mounting and dismounting of the air filter 19.

Specifically, the operating handle 1947 may have a plate-like, columnar, or the like structure. The operating handle 1947 can be disposed directly on the second end 19432 and protrude from the second end 19432. Alternatively, the operating handle 1947 may be inserted into the mounting frame 1943, and an end surface of the mounting handle is flush with the second end surface 19432.

Compared with the surface of the operating handle 1947 protruding out of the mounting frame 1943, when the air outlet filter 19 is accommodated in the air outlet cavity 170, the space occupied by the air outlet filter 19 in the air outlet cavity 170 can be reduced, so as to miniaturize the vacuum cleaner.

When the dust collector and the air outlet filter 19 work, air flow flows into the air outlet cavity 1903 from the air inlet 1905 and flows out from the air outlet 1901. At the same time, the acoustic waves generated by the power module 20 follow the flow of the air flow in a radial direction. Because the primary noise reduction portions 1921 are arranged at intervals along the airflow flowing direction in the air outlet cavity 1903, and the primary noise reduction portions 1921 are all located at the air outlet 1901 on the airflow flowing path, in the process of propagation of the sound waves in the air outlet cavity 1903, the air outlet cavity 1903 will continuously impact with the primary noise reduction portions 1921, so that the momentum of the sound waves is weakened. Also, some of the sound waves may be reflected during contact with primary noise reducer 1921 to reduce the amount of sound waves that diffuse from air outlets 1901. Further, the secondary noise reducing portion 1941 is coupled to the air outlet 1901, and the shielding area of the air outlet 1901 is increased, so that when the sound wave is diffused from the air outlet 1901, the sound wave can collide with the secondary noise reducing portion 1941, and the momentum and the number of the sound wave are further attenuated and then discharged from the noise reducing passage 19410. Through the shielding of the primary noise reduction part 1921 and the secondary noise reduction part 1941, the momentum and the number of sound waves are weakened, so that the noise is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (12)

1. An air outlet filter, comprising:

a main body having an air outlet cavity formed therein; the main body is provided with an air inlet hole and an air outlet, and the air inlet hole, the air outlet cavity and the air outlet are communicated in sequence;

the first noise reduction part is arranged in the air outlet cavity and comprises a plurality of primary noise reduction parts, the primary noise reduction parts are arranged at intervals along the airflow flowing direction in the air outlet cavity, and the primary noise reduction parts are all positioned on the airflow flowing path; and

and the second noise reduction piece is matched and connected with the air outlet and comprises a secondary noise reduction part, and a plurality of noise reduction channels communicated with the air outlet cavity are formed in the secondary noise reduction part.

2. The air outlet filter according to claim 1, wherein any two adjacent primary noise reduction portions are arranged in a staggered manner in a circumferential direction and/or an axial direction of the main body.

3. An air outlet filter element according to claim 2, wherein projections of two primary noise reduction parts which are arbitrarily offset and adjacently arranged on a plane where the air outlet is located cover the air outlet together.

4. An air outlet filter according to claim 3, wherein each of the primary noise reducing portions extends in a radial direction of the main body.

5. The air outlet filter according to claim 1, wherein the first noise reducer further includes a support frame disposed on a wall of the air outlet chamber, and the plurality of primary noise reducers are mounted on the support frame.

6. The outlet filter according to claim 5, wherein the support frame includes a support base plate and a plurality of support rods extending in the axial direction of the main body, the plurality of support rods are arranged at intervals along the circumferential direction of the support base plate, and the plurality of primary noise reduction portions are fixed to the support rods.

7. The air outlet filter according to claim 1, wherein the second noise reduction member includes a mounting frame coupled to the air outlet, the mounting frame having a first end surface adjacent to the air outlet and a second end surface away from the air outlet along the axial direction of the main body, and the plurality of noise reduction channels extend through the first end surface and the second end surface.

8. The air outlet filter according to claim 7, wherein the aperture of each of the noise reduction channels increases gradually from the first end surface to the second end surface.

9. An air outlet filter according to claim 7, wherein the mounting frame is provided with a turn buckle at its periphery.

10. An air-outlet filter according to claim 7, wherein an operating handle is provided on the second end face of the mounting frame.

11. An air outlet filter according to claim 1, wherein the main body is a filter.

12. A vacuum cleaner, comprising:

the dust cup assembly comprises an air exhaust main body, and an air exhaust cavity is formed in the air exhaust main body; and

the outlet filter according to any one of claims 1 to 11, wherein the outlet filter is fitted into the exhaust chamber, and the noise reduction passage communicates with the outside.

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