Silencing assembly and electrical equipment

Abstract

The utility model discloses a silencing assembly and electrical equipment, and belongs to the technical field of noise reduction, and the silencing assembly comprises a fan cover which is provided with an air duct, the air duct comprises a first silencing section and a second silencing section which are arranged in the first direction and communicate with each other, and the first direction is the extension direction of the air duct; the first partition plate is arranged on the first silencing section and extends in the first direction, the length of the first partition plate in the first direction is smaller than that of the air duct in the first direction, the first silencing section is divided into a plurality of sub-channels by the first partition plate, and the sectional area of each sub-channel is smaller than that of the second silencing section; the section mutation is formed at the junction of the sub-channel and the second silencing section, so that sound waves are reflected at the section mutation position, and the reflection can cause energy dispersion and attenuation of the sound waves, so that the noise intensity is attenuated, and the interference to the surrounding environment of equipment is reduced; the windward area of the first partition plate can be reduced to a large extent, and blocking of airflow in the air duct is weakened.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of noise reduction, and particularly relates to a sound elimination assembly and an electrical equipment. BACKGROUND

[0002] With the rapid development of new energy equipment, in order to meet the heat dissipation requirement of electrical equipment in the working process, a heat dissipation fan is usually arranged in the electrical equipment. The high-speed rotation of the fan can take away a large amount of heat to the external environment, but at the same time, very high noise is generated, which causes interference to the environment around the equipment. CONTENT OF THE UTILITY MODEL

[0003] The sound elimination assembly provided by the application is aimed at solving the technical problem that the electrical equipment generates very high noise during heat dissipation, which causes interference to the environment around the equipment. Another object of the application is to provide an electrical equipment.

[0004] Technical scheme: The sound elimination assembly provided by the application comprises:

[0005] The fan cover has an air duct, the air duct comprises a first sound elimination section and a second sound elimination section arranged and connected in a first direction, and the first direction is the extension direction of the air duct.

[0006] The first partition plate is arranged in the first sound elimination section and extends in the first direction. The length of the first partition plate in the first direction is less than the length of the air duct in the first direction. The first partition plate divides the first sound elimination section into a plurality of sub-channels. Each sub-channel is arranged in the first direction, and the cross-sectional area of each sub-channel is less than the cross-sectional area of the second sound elimination section.

[0007] In some embodiments, the sound elimination assembly comprises a plurality of first sound elimination sections and a plurality of first partition plates. The plurality of first sound elimination sections are arranged at intervals in the first direction. Each first sound elimination section corresponds to at least one first partition plate. The second sound elimination section is arranged between two adjacent first sound elimination sections.

[0008] In some embodiments, the first partition plates in the plurality of first sound elimination sections are arranged correspondingly in the first direction.

[0009] Alternatively, the first partition plates in two adjacent first sound elimination sections are arranged at intervals in a second direction, and the second direction intersects the first direction.

[0010] Alternatively, the first partition plates in two adjacent first sound elimination sections are arranged at an angle.

[0011] In some embodiments, a plurality of first partition plates are arranged at intervals in the second direction.

[0012] In some embodiments, the first partition plate comprises a plurality of sequentially connected sub-parts, wherein part of the sub-parts extend along the first direction, and another part of the sub-parts are inclined to the first direction.

[0013] Alternatively, part of the sub-parts extend along the first direction, and another part of the sub-parts are at least one of arc-shaped and wave-shaped.

[0014] Alternatively, each of the sub-parts extends along an arc-shaped track, and the convex directions of adjacent two sub-parts are opposite.

[0015] In some embodiments, the first partition plate extends along an arc-shaped track.

[0016] In some embodiments, the sound-damping assembly further comprises a second partition plate, which is arranged in the first sound-damping section and extends along the first direction, and the first partition plate and the second partition plate are arranged in a cross manner.

[0017] In some embodiments, the inner wall of the fan cover and / or the first partition plate is provided with a sound-absorbing layer.

[0018] In some embodiments, the sound-damping assembly further comprises a filter screen, which is arranged in the air duct.

[0019] Correspondingly, the electrical equipment provided in the embodiments of the present application comprises:

[0020] An electrical cabinet, which is provided with a ventilation opening;

[0021] The sound-damping assembly described above, wherein the fan cover has a first air opening, and the first air opening is in communication with the ventilation opening.

[0022] In some embodiments, the fan cover is arranged in the electrical cabinet, the first air opening is arranged on a side of the fan cover facing the electrical cabinet, and the fan cover is provided with a second air opening at an end thereof away from the ventilation opening.

[0023] Beneficial effects: The sound-damping assembly provided in the embodiments of the present application divides the first sound-damping section into a plurality of sub-passages by the first partition plate. Since the cross-sectional area of the sub-passages is smaller than that of the second sound-damping section, when the noise passes through the junction between the sub-passages and the second sound-damping section, the sudden change in cross-sectional area will cause the sound waves to be reflected at this point. The reflection will cause the energy of the sound waves to be dispersed and attenuated, thereby causing the noise intensity to be attenuated, and reducing the interference on the environment around the equipment. At the same time, the first partition plate is arranged to extend along the first direction, which can greatly reduce the windward area of the first partition plate, thereby weakening the obstruction to the airflow in the air duct.

[0024] The electrical equipment provided in the embodiments of the present application comprises the sound-damping assembly described above, and therefore can have all the technical features and beneficial effects of the sound-damping assembly. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the noise reduction assembly provided in an embodiment of this application;

[0027] Figure 2 A schematic diagram showing the distribution location of the first noise-absorbing section provided in an embodiment of this application;

[0028] Figure 3 A schematic diagram showing another distribution location of the first noise-absorbing segment provided in an embodiment of this application;

[0029] Figure 4 A schematic diagram of multiple first noise reduction sections provided in the embodiments of this application;

[0030] Figure 5 A schematic diagram of a plurality of first partitions provided in an embodiment of this application;

[0031] Figure 6 A schematic diagram showing the distribution locations of multiple first noise reduction sections provided in the embodiments of this application;

[0032] Figure 7 A schematic diagram showing another distribution location of the plurality of first noise-absorbing sections provided in an embodiment of this application;

[0033] Figure 8 A top view of the noise reduction assembly provided in the embodiments of this application;

[0034] Figure 9 A schematic diagram of the first partition provided in an embodiment of this application;

[0035] Figure 10 A schematic diagram of another structure of the first partition provided in the embodiments of this application;

[0036] Figure 11 A schematic diagram of another structure of the first partition provided in the embodiments of this application;

[0037] Figure 12 A schematic diagram of another structure of the first partition provided in the embodiments of this application;

[0038] Figure 13 A schematic diagram of the first and second partitions provided in the embodiments of this application;

[0039] Figure 14A schematic view of the sound-absorbing layer provided in the embodiments of the present application is shown in FIG. 1.

[0040] Figure 15 A schematic view of the fan cover and the electrical cabinet provided in the embodiments of the present application is shown in FIG. 2.

[0041] Figure 16 A schematic view of the ventilation opening provided in the embodiments of the present application is shown in FIG. 3.

[0042] Reference signs: 1, fan cover; 11, first sound-absorbing section; 111, sub passage; 12, second sound-absorbing section; 13, first air outlet; 14, second air outlet; 2, first partition; 21, sub part; 3, second partition; 4, sound-absorbing layer; 5, filter screen; 6, electrical cabinet; 61, ventilation opening. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the terms "height", "thickness", "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" is two or more, at least one of which can be one, two or more, unless otherwise explicitly specified.

[0045] It should also be noted that in the drawings of the embodiments of the present application, the arrow marked X represents the first direction X, and the arrow marked Y represents the second direction Y. The first direction X and the second direction Y are introduced to more clearly describe the structure and relative positional relationship of the components in the sound-absorbing assembly. In actual application, the first direction X and the second direction Y can change according to the different placement modes of the sound-absorbing assembly.

[0046] Please refer to Figure 1 The sound-absorbing assembly of the embodiments of the present application includes a fan cover 1 and a first partition 2. The fan cover 1 has an air duct for the airflow drawn by a fan when the electrical equipment is cooling. The air duct includes a first sound-absorbing section 11 and a second sound-absorbing section 12 arranged along a first direction X and connected to each other. The first direction X is the extension direction of the air duct, and can also be understood as the main flow direction of the airflow in the air duct.

[0047] The first baffle 2 is arranged in the first sound attenuation section 11 and extends along the first direction X, in which the length of the first baffle 2 is less than the length of the air duct, which can be understood as the length of the air cover 1, and the first baffle 2 divides the first sound attenuation section 11 into a plurality of sub-passages 111, each of which is parallel to each other and arranged along the first direction X, and the cross-sectional area of each sub-passage 111 is less than that of the second sound attenuation section 12, which is perpendicular to the first direction X.

[0048] The airflow generated by the heat dissipation of the electrical equipment flows through the air duct. Due to the fact that the cross-sectional area of each sub-passage 111 is less than that of the second sound attenuation section 12, the sub-passage 111 generates a cross-sectional mutation at the junction with the second sound attenuation section 12. Therefore, when the noise passes through the cross-sectional mutation position of the sub-passage 111 and the second sound attenuation section 12, reflection, superposition and interference phenomena will occur. Due to the discontinuity of impedance, part of the sound waves will be reflected back and superimposed and interfered with the subsequent incoming sound waves, resulting in the dispersion and weakening of the energy of the sound waves, thereby achieving the effect of reducing noise and protecting the environment around the electrical equipment. In addition, since the extension direction of the first baffle 2 is parallel to the flow path of the airflow, the blocking area of the first baffle 2 to the airflow is reduced, which is beneficial to ensure the ventilation volume of the air duct and prevent interference with the heat dissipation of the electrical equipment. In the embodiment, no baffle is arranged in the second sound attenuation section 12. In some other embodiments, a baffle can also be arranged in the second sound attenuation section 12, as long as the cross-sectional area of the passage at the junction of the second sound attenuation section 12 is different from that of the first sound attenuation section 11.

[0049] Please refer to Figure 1 In some embodiments, the air cover 1 has a first air port 13 and a second air port 14 arranged opposite to each other along the first direction X and communicating with the air duct. The first sound attenuation section 11 is arranged at one end of the air duct close to the first air port 13 along the first direction X, and the second sound attenuation section 12 is arranged at one end of the air duct close to the second air port 14 along the first direction X.

[0050] Please refer to Figure 2 Alternatively, the first sound attenuation section 11 is arranged at one end of the air duct close to the second air port 14 along the first direction X, and the second sound attenuation section 12 is arranged at one end of the air duct close to the first air port 13 along the first direction X.

[0051] Please refer to Figure 3 Alternatively, the first sound attenuation section 11 is arranged at the middle position of the air duct. At this time, the number of the second sound attenuation sections 12 is set to two, and the air duct corresponds to one second sound attenuation section 12 at the first air port 13 and the second air port 14, respectively, that is, the two second sound attenuation sections 12 are distributed on both sides of the first sound attenuation section 11, so that the structure of cross-sectional mutation can be formed on both sides of the first sound attenuation section 11.

[0052] Please refer toFigure 4 In some embodiments, the sound attenuation assembly comprises a plurality of first sound attenuation sections 11 and a plurality of first baffles 2, the plurality of first sound attenuation sections 11 are arranged in intervals along the first direction X, each first sound attenuation section 11 corresponds to at least one first baffle 2, and a second sound attenuation section 12 is arranged between two adjacent first sound attenuation sections 11. The plurality of first sound attenuation sections 11 arranged in intervals makes the first baffles 2 form an intermittent distribution structure, which can reduce wind resistance, improve ventilation effect, and reduce the propagation path of sound waves, while the air duct has a plurality of cross-section mutation positions in the first direction X, which can form a layer-by-layer weakening of noise and enhance the noise reduction effect.

[0053] Please refer to Figure 4 and Figure 5 In some embodiments, the first baffles 2 in the plurality of first sound attenuation sections 11 are arranged correspondingly along the first direction X, i.e., the first baffles 2 corresponding to each first sound attenuation section 11 are arranged in a straight line, and the arrangement direction is parallel to the first direction X. At this time, the path of the airflow passing through is relatively single, which can maintain the airflow velocity in the air duct and provide sufficient air volume for heat dissipation of electrical equipment.

[0054] For example, the air duct is provided with one first sound attenuation section 11 at the positions corresponding to the first air inlet 13 and the second air inlet 14, one or more first baffles 2 are arranged in each first sound attenuation section 11, a second sound attenuation section 12 is arranged between two first sound attenuation sections 11, and the first baffles 2 of the two first sound attenuation sections 11 are arranged correspondingly along the first direction X, i.e., the projections of the first baffles 2 on the same plane along the first direction X are coincident.

[0055] Please refer to Figure 6 and Figure 7 In some embodiments, the first baffles 2 in the adjacent two first sound attenuation sections 11 are arranged in a staggered manner along the second direction Y, and the second direction Y intersects the first direction X. The staggered arrangement means that the first baffles 2 in the adjacent two first sound attenuation sections 11 are arranged in intervals along the second direction Y in the orthographic projection on the same plane along the first direction X, so that the path of the sub-passage 111 to the second sound attenuation section 12 changes. This arrangement can increase the diffusion path of the airflow in the air duct, change the airflow in different directions, increase the scattering and attenuation effect of sound, and thus reduce the propagation of noise.

[0056] Please refer to Figure 6 For example, the air duct is provided with one first sound attenuation section 11 at the positions corresponding to the first air inlet 13 and the second air inlet 14, a plurality of first baffles 2 are arranged in each first sound attenuation section 11, a second sound attenuation section 12 is arranged between two first sound attenuation sections 11, and the first baffles 2 in the two first sound attenuation sections 11 are arranged in intervals along the second direction Y in the orthographic projection on the same plane along the first direction X.

[0057] Please refer to Figure 7For example, the air duct is provided with a first sound attenuation section 11 at a position corresponding to the first air port 13, the second air port 14 and a middle position of the air duct, and a second sound attenuation section 12 is arranged between two adjacent first sound attenuation sections 11. A plurality of first baffles 2 are arranged in each first sound attenuation section 11. In the first direction X, the orthographic projection of the first baffles 2 in the same plane in the two adjacent first sound attenuation sections 11 is arranged in a second direction Y.

[0058] For example, the air duct is provided with a first sound attenuation section 11 at a position corresponding to the first air port 13, the second air port 14 and a middle position of the air duct, and a second sound attenuation section 12 is arranged between two adjacent first sound attenuation sections 11. A plurality of first baffles 2 are arranged in each first sound attenuation section 11. In the first direction X, the orthographic projection of the first baffles 2 in the same plane in the two adjacent first sound attenuation sections 11 is arranged in a second direction Y. Figure 8 In some embodiments, the first baffles 2 in the two adjacent first sound attenuation sections 11 are arranged at an angle, that is, the orthographic projection of the first baffles 2 in the same plane in the two adjacent first sound attenuation sections 11 in the first direction X is arranged in an X shape. This further increases the degree of change of the airflow path in the air duct and can change the flow direction of the airflow, so that the airflow generates rotation and turbulence, thereby enhancing sound scattering and attenuation, and further improving the noise reduction effect.

[0059] For example, the air duct is provided with a first sound attenuation section 11 at a position corresponding to the first air port 13, the second air port 14 and a middle position of the air duct, and a second sound attenuation section 12 is arranged between two adjacent first sound attenuation sections 11. A plurality of first baffles 2 are arranged in each first sound attenuation section 11. In the first direction X, the orthographic projection of the first baffles 2 in the same plane in the two adjacent first sound attenuation sections 11 is arranged in a second direction Y. Figure 5 to Figure 11 In some embodiments, the number of first baffles 2 is arranged in a plurality of intervals in the second direction Y. The increase in the number of first baffles 2 reduces the cross-sectional area of each sub-channel 111, which can increase the resistance experienced by the airflow when passing through, slow down the airflow speed, and at the same time, the flow path of the airflow between the plurality of first baffles 2 is more complex, so that the scattering of sound in different directions is increased, which is beneficial to improve the noise reduction effect. In the present embodiment, the number of first baffles 2 in each first sound attenuation section 11 is the same, and in other embodiments, the number of first baffles 2 in each first sound attenuation section 11 can be different.

[0060] For example, the air duct is provided with a first sound attenuation section 11 at a position corresponding to the first air port 13, the second air port 14 and a middle position of the air duct, and a second sound attenuation section 12 is arranged between two adjacent first sound attenuation sections 11. A plurality of first baffles 2 are arranged in each first sound attenuation section 11. In the first direction X, the orthographic projection of the first baffles 2 in the same plane in the two adjacent first sound attenuation sections 11 is arranged in a second direction Y. Figure 9 In some embodiments, the first baffles 2 include a plurality of sub-parts 21 connected in sequence in the first direction X, wherein part of the sub-parts 21 extend in the first direction X, and another part of the sub-parts 21 are inclined to the first direction X. Specifically, the plurality of sub-parts 21 can be divided into first sub-parts, second sub-parts and third sub-parts, the number of first sub-parts and second sub-parts is two respectively, the two first sub-parts and the third sub-part extend in the first direction X, and the two second sub-parts are inclined to the first direction X; the two ends of the third sub-part are respectively connected to a second sub-part, and the two second sub-parts are oppositely arranged about the third sub-part, at this time, the third sub-part and the two second sub-parts form a trapezoid; one first sub-part is connected to one end of each second sub-part away from the third sub-part, so that in the first direction X, the sub-channel 111 is composed of small cavities with different cross-sectional sizes, which has the change of expansion and contraction, further increasing the intensity of sound wave reflection inside the air duct, and at the same time, the expansion and contraction structure can also play a role in local resonance, so that the sound wave is dissipated due to resonance.

[0061] For example, the air duct is provided with a first sound attenuation section 11 at a position corresponding to the first air port 13, the second air port 14 and a middle position of the air duct, and a second sound attenuation section 12 is arranged between two adjacent first sound attenuation sections 11. A plurality of first baffles 2 are arranged in each first sound attenuation section 11. In the first direction X, the orthographic projection of the first baffles 2 in the same plane in the two adjacent first sound attenuation sections 11 is arranged in a second direction Y. Figure 10In some embodiments, the first baffle 2 comprises a plurality of sub-parts 21 connected in sequence along the first direction X, wherein part of the sub-parts 21 extend along the first direction X, and another part of the sub-parts 21 are at least one of arc-shaped and wave-shaped. Among the plurality of small cavities constituting the sub-channel 111, the cross-sectional area of part of the cavities is continuously variable, which can meet different design requirements.

[0062] Please refer to Figure 11 In some embodiments, the first baffle 2 comprises a plurality of sub-parts 21 connected in sequence, each sub-part 21 extends along an arc-shaped trajectory, and the convex directions of adjacent two sub-parts 21 are opposite. The first baffle 2 is S-shaped or wave-shaped as a whole, so that the cross-sectional area of the sub-channel 111 is continuously variable, which can increase the resistance of airflow and the number of sound reflection and scattering, and improve the noise reduction effect.

[0063] Please refer to Figure 12 In some embodiments, the first baffle 2 extends along an arc-shaped trajectory. Noise will be focused or dispersed when passing through the first baffle 2, which can be used to adjust the propagation direction and intensity of sound to meet specific noise reduction requirements.

[0064] Please refer to Figure 13 In some embodiments, the noise reduction assembly further comprises a second baffle 3, the second baffle 3 is arranged in the first noise reduction section 11 and extends along the first direction X, and the first baffle 2 and the second baffle 3 are arranged in cross, i.e. the first baffle 2 and the second baffle 3 are distributed in X shape. The second baffle 3 cooperates with the first baffle 2 to increase the number of sub-channels 111 formed in a single first noise reduction section 11, so that the airflow forms a relatively complex flow path around the first baffle 2 to increase the scattering effect of sound, so that sound can propagate in more directions, thereby achieving the purpose of reducing noise propagation.

[0065] Please refer to Figure 14 In some embodiments, the inner wall of the fan cover 1 and / or the first baffle 2 is provided with a sound-absorbing layer 4. The sound-absorbing layer 4 can be made of sound-absorbing cotton, which can be fixed by means of gluing, sheet metal strip pressing, etc. The sound-absorbing cotton has an open porous structure and can absorb the energy of sound waves to enhance the sound absorption effect.

[0066] Please refer to Figure 14 In some embodiments, the noise reduction assembly further comprises a filter screen 5, the filter screen 5 is arranged in the air duct, the filter screen 5 is perpendicular to the first direction X, and is used to filter sundries into the air duct, thereby protecting the electrical equipment.

[0067] Please refer to Figure 1 , Figure 13 , Figure 15 and Figure 16Correspondingly, the electrical equipment provided by the embodiments of the present application comprises an electrical cabinet 6 and the sound attenuation assembly described above. The electrical cabinet 6 is provided with a ventilation opening 61 for cooperating with a fan to draw air flow. The fan cover 1 has a first air opening 13 communicating with the air duct. The first air opening 13 is in communication with the ventilation opening 61. During heat dissipation, the electrical cabinet 6 draws air flow by the fan, so that external air enters the electrical cabinet 6 through the air duct, the first air opening 13 and the ventilation opening 61, or so that hot air in the electrical cabinet 6 is discharged through the ventilation opening 61, the first air opening 13 and the air duct.

[0068] The communication between the first air opening 13 and the ventilation opening 61 can be direct docking or indirect connection, for example, the first air opening 13 communicates with the ventilation opening 61 through a wind pipe or a bellows, or the first air opening 13 and the ventilation opening 61 overlap each other. In this case, the sound attenuation assembly is part of the electrical equipment. For example, the fan cover 1 is a component part of the shell of the electrical cabinet 6, or the fan cover 1 is part of the cabinet door of the electrical cabinet 6, or the fan cover 1 is directly used as the air duct of the electrical equipment.

[0069] Please refer to Figure 13 , Figure 15 and Figure 16 In some embodiments, the fan cover 1 is arranged on the outer side wall of the electrical cabinet 6. The first air opening 13 is arranged on the side of the fan cover 1 facing the electrical cabinet 6. The fan cover 1 is provided with a second air opening 14 at the end away from the ventilation opening 61. The second air opening 14 communicates with the ventilation opening 61 through the air duct and the first air opening 13. In the case that the electrical cabinet 6 draws external air by the fan, the air enters through the second air opening 14. In the case that the electrical cabinet 6 discharges air in the cabinet by the fan, the air is discharged through the second air opening 14. The fan cover 1 and the electrical cabinet 6 can be connected by fasteners such as screws, bolts, rivets, pins, etc. or can be fixed by welding.

[0070] In other embodiments, the fan cover 1 can also be arranged inside the electrical cabinet 6, as long as the fan cover 1 is isolated from the components in the electrical cabinet 6.

[0071] In some embodiments, the electrical cabinet 6 can be an energy storage cabinet, a power distribution cabinet, a switch cabinet, etc. In addition, an inverter, a charging pile or other equipment with a fan can also be equipped with a sound attenuation assembly. That is, on the basis of the structure of the equipment with ventilation and heat dissipation, the sound attenuation assembly can be configured to reduce noise.

[0072] In the above embodiments, the description of each embodiment has its own emphasis. The parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0073] The sound attenuation assembly and the electrical equipment provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the technical solutions of the present application and the core ideas thereof. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently; and the modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound attenuation assembly, characterized by, The silencing assembly comprises: a wind cover (1) having a wind channel, the wind channel comprising a first sound attenuation section (11) and a second sound attenuation section (12) arranged in a first direction and connected in communication, the first direction being the extension direction of the wind channel; a first baffle (2) arranged in the first sound attenuation section (11) and extending in the first direction, the length of the first baffle (2) in the first direction being less than the length of the wind channel in the first direction, the first baffle (2) dividing the first sound attenuation section (11) into a plurality of sub-channels (111), each of the sub-channels (111) being arranged in the first direction, and the cross-sectional area of each of the sub-channels (111) being less than the cross-sectional area of the second sound attenuation section (12).

2. The sound attenuation assembly of claim 1, wherein, The silencing assembly comprises a plurality of the first sound attenuation sections (11) and a plurality of the first baffles (2), the plurality of the first sound attenuation sections (11) being arranged in the first direction at intervals, each of the first sound attenuation sections (11) corresponding to at least one of the first baffles (2), and the second sound attenuation section (12) being arranged between any two adjacent first sound attenuation sections (11).

3. The sound attenuation assembly of claim 2, wherein, The first baffles (2) in the plurality of the first sound attenuation sections (11) are arranged in correspondence in the first direction. Alternatively, the first baffles (2) in any two adjacent first sound attenuation sections (11) are arranged in a second direction at intervals, the second direction intersecting the first direction. Alternatively, the first baffles (2) in any two adjacent first sound attenuation sections (11) are arranged at an angle.

4. The sound attenuation assembly of any one of claims 1 to 3, wherein, The number of the first baffles (2) is arranged in the second direction at intervals.

5. The sound attenuation assembly of claim 1, wherein, The first baffle (2) comprises a plurality of sub-sections (21) connected in sequence, wherein part of the sub-sections (21) extend in the first direction, and the other part of the sub-sections (21) are inclined to the first direction. Alternatively, part of the sub-sections (21) extend in the first direction, and the other part of the sub-sections (21) have at least one of an arc shape and a wave shape. Alternatively, each of the sub-sections (21) extends along an arc-shaped track, and the convex directions of any two adjacent sub-sections (21) are opposite.

6. The sound attenuation assembly of claim 1, wherein, The first baffle (2) extends along an arc-shaped track.

7. The sound attenuation assembly of claim 1, wherein, The silencing assembly further comprises a second baffle (3) arranged in the first sound attenuation section (11) and extending in the first direction, the first baffle (2) and the second baffle (3) being arranged in cross.

8. The sound attenuation assembly of claim 1, wherein, The inner wall of the wind cover (1) and / or the first baffle (2) is provided with a sound-absorbing layer (4).

9. The sound attenuation assembly of claim 1 or 8, wherein, The silencing assembly further comprises a filter screen (5) arranged in the wind channel.

10. An electrical device, characterized by The silencing assembly comprises: an electrical cabinet (6) provided with a ventilation opening (61); The silencing assembly according to any one of claims 1 to 9, the wind cover (1) having a first air opening (13) in communication with the ventilation opening (61).

11. The electrical device of claim 10, wherein, The fan cover (1) is arranged on the electrical cabinet (6), the first air port (13) is arranged on the side of the fan cover (1) facing the electrical cabinet (6), and the second air port (14) is arranged on the end of the fan cover (1) away from the air vent (61).

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