CN220775066U

CN220775066U - Electrical equipment and cabinet thereof

Info

Publication number: CN220775066U
Application number: CN202322469913.5U
Authority: CN
Inventors: 高祥; 姚琦; 金成山
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2023-09-12
Filing date: 2023-09-12
Publication date: 2024-04-12
Anticipated expiration: 2033-09-12

Abstract

The utility model discloses an electrical device and a cabinet thereof, wherein a first noise reduction accessory or a second noise reduction accessory is arranged at an air inlet of the cabinet, and/or a first noise reduction accessory or a second noise reduction accessory is arranged at an air outlet of the cabinet; the first noise reduction accessory comprises a first air guide cavity shell and at least two first partition plates which are sequentially arranged at intervals along the drainage direction of the first air guide cavity shell, and first ventilation holes corresponding to at least two adjacent first partition plates are staggered; the second noise reduction accessory comprises a second air guide cavity shell and at least two second partition plates which are sequentially arranged at intervals along the drainage direction of the second air guide cavity shell, and second ventilation holes corresponding to any two second partition plates are opposite to each other. The cabinet not only can ensure enough ventilation quantity, but also can greatly reduce noise of the cabinet.

Description

Electrical equipment and cabinet thereof

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to electrical equipment and a cabinet thereof.

Background

With the continuous development of the photovoltaic industry, the integration degree of the interior of cabinets of electric equipment such as an inverter is higher and higher, the power density of the whole machine is gradually increased, the increase of the power density inevitably results in the improvement of the heat dissipation requirement; the existing heat dissipation mode is mainly air cooling, so that the flow and the rotating speed of a fan are continuously improved, and the fan and the turbulent flow of air generate great noise; meanwhile, devices such as a reactor and the like in the electrical equipment generate larger high-frequency noise, and the noise of the whole machine tends to be continuously increased; meanwhile, in order to obtain comfortable working and living environments, the requirements of customers on product noise are higher and higher, a plurality of energy storage power stations are built close to residential areas, too high noise can cause serious trouble to surrounding residents, and meanwhile, the energy storage power stations are exposed to the too high noise for a long time and can damage people to a certain extent.

In view of the above, how to reduce noise of electrical devices has become a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present utility model provides an electrical apparatus and a cabinet thereof, so as to reduce noise of the electrical apparatus.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a cabinet of electrical equipment, wherein a first noise reduction accessory or a second noise reduction accessory is arranged at an air inlet of the cabinet, and/or a first noise reduction accessory or a second noise reduction accessory is arranged at an air outlet of the cabinet;

wherein the first noise reduction attachment comprises:

the first air guide cavity shell is used for communicating the internal air flow and the external air flow of the cabinet;

the at least two first partition plates are arranged in the first air guide cavity shell and are sequentially arranged at intervals along the drainage direction of the first air guide cavity shell, a plurality of first ventilation holes are formed in the first partition plates, and the first ventilation holes corresponding to the at least two adjacent first partition plates are staggered;

the second noise reduction accessory includes:

the second air guide cavity shell is used for communicating the internal air flow and the external air flow of the cabinet;

the at least two second baffles are arranged in the second air guide cavity shell and are sequentially distributed at intervals along the drainage direction of the second air guide cavity shell, second ventilation holes are formed in the second baffles, the second ventilation holes are strip-shaped ventilation holes which are formed in the length direction of the second baffles, and any two second ventilation holes corresponding to the second baffles are arranged right opposite to each other.

Optionally, when the first noise reduction accessory is installed at the air inlet and/or the air outlet, the first ventilation holes corresponding to any two adjacent first partition plates are staggered with each other.

Optionally, when the air inlet and/or the air outlet are/is provided with the first noise reduction accessory, the first ventilation holes are sequentially arranged at intervals in the length direction of the first partition board.

Optionally, an air inlet cover is arranged at the air inlet of the cabinet;

when the first noise reduction accessory is installed at the air inlet, the first air guide cavity shell is installed on the air inlet cover, or the first air guide cavity shell and the air inlet cover are of an integrated structure;

when the second noise reduction accessory is installed at the air inlet, the second air guide cavity shell is installed in the air inlet cover, or the second air guide cavity shell and the air inlet cover are of an integrated structure.

Optionally, when the first noise reduction accessory is installed at the air inlet and/or the air outlet, the first partition plate is a noise reduction partition plate made of noise reduction material, or a noise reduction material layer is formed on the first partition plate.

Optionally, when the second noise reduction accessory is installed at the air inlet and/or the air outlet, the second partition plate is a noise reduction partition plate made of noise reduction material, or a noise reduction material layer is formed on the second partition plate.

Optionally, when the second noise reduction accessory is installed at the air inlet and/or the air outlet, the second ventilation holes corresponding to any two second partition boards are identical in shape and size.

Optionally, when the second noise reduction accessory is installed at the air inlet and/or the air outlet, the second air guide cavity shell comprises a first cavity shell and a second cavity shell connected with one end of the first cavity shell, the flow section of the first cavity shell and the flow section of the second cavity shell are arranged in a step manner, and the flow section of the first cavity shell is larger than the flow section of the second cavity shell; the second partition plate is arranged in the first cavity shell.

Optionally, a resonant cavity protruding towards the outer wall surface of the second cavity shell is arranged on the cavity wall of the second cavity shell.

Optionally, the number of the resonant cavities is multiple, and the resonant cavities are arranged at intervals in an array on the outer wall surface of the second cavity shell.

Optionally, when the second noise reduction accessory is installed at the air inlet and/or the air outlet, a fixing bracket is further arranged on the second air guide cavity shell, and the fixing bracket is used for being fixedly connected with the cabinet wall of the cabinet; the fixed support and the second air guide cavity shell are of an integrated structure or a split type fixed connection structure.

Compared with the background technical introduction, the cabinet of the electrical equipment has the advantages that the first noise reduction accessory or the second noise reduction accessory is arranged at the air inlet of the cabinet, and/or the first noise reduction accessory or the second noise reduction accessory is arranged at the air outlet of the cabinet; the first noise reduction accessory comprises a first air guide cavity shell and at least two first partition boards, wherein the first air guide cavity shell is used for communicating the internal air flow and the external air flow of the cabinet; the first partition plates are arranged in the first air guide cavity shell and are sequentially arranged at intervals along the drainage direction of the first air guide cavity shell, a plurality of first vent holes are formed in the first partition plates, and the first vent holes corresponding to at least two adjacent first partition plates are staggered; the second noise reduction accessory comprises a second air guide cavity shell and at least two second partition boards, wherein the second air guide cavity shell is used for communicating the internal air flow and the external air flow of the cabinet; the second partition board is arranged in the second air guide cavity shell and is sequentially distributed at intervals along the drainage direction of the second air guide cavity shell, second air vent holes are formed in the second partition board, the second air vent holes are strip-shaped air vent holes formed in the length direction of the second partition board, and the second air vent holes corresponding to any two second partition boards are arranged right opposite to each other. In the practical application process, when the first noise reduction accessories are installed at the air inlet of the cabinet and/or at the air outlet of the cabinet, the inner air flow and the outer air flow of the cabinet can be communicated normally under the cooperation of the first air guide cavity shell and the corresponding first partition plates, as the first partition plates are sequentially and alternately distributed along the drainage direction of the first air guide cavity shell, a plurality of first ventilation holes are formed in the first partition plates, at least two first ventilation holes corresponding to the two adjacent first partition plates are staggered, when the noise in the cabinet is transmitted outwards, sound waves of the noise need to sequentially pass through the first partition plates, and when the sound waves pass through the two adjacent first partition plates which are staggered with each other, the sound waves pass through the first ventilation holes on the first partition plates positioned on the upstream of the noise transmission path in the two adjacent first partition plates are blocked, the first partition plates positioned on the downstream of the noise transmission path are transmitted towards two sides, and the sound waves of the first ventilation holes positioned on the downstream of the noise transmission path are mutually staggered, and the sound waves of the same frequency are mutually met, so that the noise reduction purpose is achieved; meanwhile, the first ventilation holes corresponding to the two adjacent first partition boards are staggered, so that the structure of the first noise reduction accessory also has certain waterproof performance; when the second noise reduction accessory is arranged at the air inlet of the cabinet and/or at the air outlet of the cabinet, the second partition plates in the second noise reduction accessory are sequentially arranged at intervals along the drainage direction of the second air guide cavity shell, the second partition plates are provided with second ventilation holes, the second ventilation holes are strip-shaped ventilation holes which are arranged along the length direction of the second partition plates, the second ventilation holes corresponding to any two second partition plates are arranged in a right-facing manner, and the second ventilation holes opposite to the second partition plates can ensure smooth intercommunication of air flow to ensure ventilation quantity, and greatly reduce wind resistance; and when noise sound waves in the cabinet pass through the second noise reduction accessory, the noise sound waves need to pass through a plurality of second partition plates which are arranged at intervals, and the noise sound waves can have a certain noise reduction effect on noise with preset frequency when passing through a plurality of second partition plates. The cabinet structure can ensure enough ventilation and greatly reduce noise of the cabinet.

In addition, the utility model also provides electrical equipment, which comprises a cabinet, wherein the cabinet is the cabinet of the electrical equipment described in any scheme. Because the cabinet of the electrical equipment has the technical effects, the electrical equipment with the cabinet should also have the corresponding technical effects, and will not be described in detail herein.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic axial side view of a first noise reduction attachment according to an embodiment of the present utility model;

FIG. 2 is a schematic structural view of first partition plates of a first noise reduction accessory provided in an embodiment of the present utility model, where the first partition plates are arranged at intervals and corresponding first ventilation holes are arranged in a staggered manner;

FIG. 3 is a schematic cross-sectional structure of a first noise reduction accessory according to an embodiment of the present utility model (the direction of the arrow is shown as the propagation direction of noise);

fig. 4 is a schematic structural diagram of a first noise reduction accessory provided in an embodiment of the present utility model mounted on an air intake cover;

FIG. 5 is a schematic perspective view of a second noise reduction accessory according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the cross-sectional structure of A-A of FIG. 5;

FIG. 7 is a schematic axial side view of a second noise reduction attachment according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of an external structure of a cabinet according to an embodiment of the present utility model;

FIG. 9 is a schematic view of the cross-sectional B-B structure of FIG. 8 (the solid arrows indicate the direction of the air flow).

Wherein, in fig. 1-9:

the device comprises a cabinet 1, an air inlet 11, an air outlet 12 and an air inlet cover 13;

the first noise reduction accessory 2, the first air guide cavity shell 21, the first baffle 22 and the first vent 220;

the second noise reduction accessory 3, the second air guide cavity shell 31, the first cavity shell 311, the second cavity shell 312, the resonance cavity 313, the second partition plate 32, the second ventilation hole 320 and the fixed bracket 33.

Detailed Description

The utility model aims at providing an electrical device and a cabinet thereof so as to reduce noise of the electrical device.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 9, the present utility model specifically provides a cabinet for electrical equipment, specifically, a first noise reduction accessory 2 or a second noise reduction accessory 3 is installed at an air inlet 11 of the cabinet 1, and/or a first noise reduction accessory 2 or a second noise reduction accessory 3 is installed at an air outlet 12 of the cabinet 1; the first noise reduction accessory 2 comprises a first air guide cavity shell 21 and at least two first partition plates 22, wherein the first air guide cavity shell 21 is used for communicating the internal air flow and the external air flow of the cabinet 1; the first partition plates 22 are arranged in the first air guide cavity shell 21 and are sequentially arranged at intervals along the drainage direction of the first air guide cavity shell 21, a plurality of first ventilation holes 220 are formed in the first partition plates 22, and the first ventilation holes 220 corresponding to at least two adjacent first partition plates 22 are staggered; the second noise reduction accessory 3 comprises a second air guide cavity shell 31 and at least two second partition plates 32, and the second air guide cavity shell 31 is used for communicating the internal air flow and the external air flow of the cabinet 1; the second partition plates 32 are installed in the second air guide cavity shell 31 and are sequentially arranged at intervals along the drainage direction of the second air guide cavity shell 31, second air vent holes 320 are formed in the second partition plates 32, the second air vent holes 320 are strip-shaped air vent holes formed in the length direction of the second partition plates 32, and the second air vent holes 320 corresponding to any two second partition plates 32 are arranged opposite to each other.

In the practical application process, when the first noise reduction accessories 2 are installed at the air inlet 11 of the cabinet 1 and/or at the air outlet 12 of the cabinet 1, the internal and external airflows of the cabinet 1 can be communicated normally under the cooperation of the first air guide cavity shell 21 and the corresponding first partition plates 22, as the first partition plates 22 are orderly and alternately distributed along the drainage direction of the first air guide cavity shell 21, the first partition plates 22 are provided with a plurality of first ventilation holes 220, at least two adjacent first partition plates 22 correspond to the first ventilation holes 220 which are staggered with each other, so that when the internal noise of the cabinet 1 propagates outwards, sound waves of the noise need to sequentially pass through each first partition plate 22, and after passing through the first ventilation holes 220 on the first partition plates 22 positioned on the upstream of the noise propagation path of the two adjacent first partition plates 22, the sound waves are blocked at the first partition plates 22 positioned on the downstream of the noise propagation path to generate opposite sides for propagation, when the sound waves of the noise are required to pass through the first partition plates 22 which are staggered with each other, and the sound waves of the noise waves are attenuated when meeting at the same frequency when the two adjacent first partition plates 22 meet each other; meanwhile, the first ventilation holes 220 corresponding to the two adjacent first partition plates 22 are staggered, so that the structure of the first noise reduction accessory 2 also has certain waterproof performance; when the second noise reduction accessory 3 is installed at the air inlet 11 of the cabinet 1 and/or the air outlet 12 of the cabinet 1, the second partition plates 32 in the second noise reduction accessory 3 are sequentially arranged at intervals along the drainage direction of the second air guide cavity shell 31, the second partition plates 32 are provided with second air ventilation holes 320, the second air ventilation holes 320 are strip-shaped air ventilation holes which are arranged along the length direction of the second partition plates 32, the second air ventilation holes 320 corresponding to any two second partition plates 32 are arranged oppositely, the second air ventilation holes 320 opposite to the second partition plates 32 can ensure smooth air flow intercommunication, and the air resistance is greatly reduced; the noise sound wave in the cabinet 1 needs to pass through a plurality of second partition plates 32 arranged at intervals when passing through the second noise reduction accessory 3, and the sound wave can have a certain noise reduction effect on noise with preset frequency when passing through a plurality of second partition plates 32. In conclusion, the structure of the cabinet 1 can ensure enough ventilation and greatly reduce noise of the cabinet.

It should be noted that, the air inlet 11 of the cabinet 1 is provided with the first noise reduction accessory 2 or the second noise reduction accessory 3, and/or the air outlet 12 of the cabinet 1 is provided with the first noise reduction accessory 2 or the second noise reduction accessory 3, which specifically includes various schemes: for example, scheme one: the first noise reduction accessory 2 is arranged only at the air inlet 11 of the cabinet body 1; for example, scheme II: the first noise reduction accessory 2 is arranged only at the air outlet 12 of the cabinet body 1; for example, scheme three: the first noise reduction accessories 2 are arranged at the positions of the air inlet 11 and the air outlet 12; for example, scheme four: the second noise reduction accessory 3 is arranged only at the air inlet 11 of the cabinet body 1; for example, scheme five: the second noise reduction accessory 3 is arranged only at the air outlet 12 of the cabinet body 1; for example, the scheme six: the second noise reduction accessories 3 are arranged at the positions of the air inlet 11 and the air outlet 12; for example, scheme seven: a first noise reduction accessory 2 is arranged at the air inlet 11, and a second noise reduction accessory 3 is arranged at the air outlet 12; and the scheme eight: a second noise reduction attachment 3 is arranged at the air inlet 11 and a first noise reduction attachment 2 is arranged at the air outlet 12. In the practical application process, a corresponding scheme can be selected according to the practical requirement, and the novel preferred scheme seven is found out through a large number of simulation tests, the first noise reduction accessory 2 is more suitable for being installed at the air inlet 11 to meet the requirement of air inlet quantity, and the noise reduction effect is good; the second noise reduction accessory 3 is more suitable for being installed at the air outlet 11 to meet the air outlet requirement, and the noise reduction effect is good.

In addition, the number of the first baffles 22 in the first noise reduction attachment 2 may be selected according to actual requirements, for example, may be selected to be more than two. In this case, the first ventilation holes 220 corresponding to any two adjacent first separators 22 are preferably arranged to be offset from each other, so that the purpose of better noise reduction can be achieved.

In a further embodiment, when the first noise reduction attachment 2 is installed at the air inlet 11 and/or the air outlet 12, the first ventilation holes 220 are preferably designed to be sequentially spaced apart in the length direction of the first partition 22. Through designing into this kind of structural style for the staggered arrangement of the first ventilation hole 220 that two adjacent first baffles 22 correspond is more convenient, for example first baffle 22 is rectangular shape baffle, and first ventilation hole 220 is arranged at rectangular shape baffle's length direction interval in proper order. It should be understood that the above arrangement is merely exemplary of the embodiments of the present utility model, and other arrangements may be designed in practical application, as long as the first ventilation holes 220 corresponding to the adjacent first partition plates 22 are staggered, which is not limited in this way.

In some specific embodiments, the air inlet 11 of the cabinet 1 is also generally provided with an air inlet cover 13, and a specific structure form may be an air inlet grille or a shutter structure form, which mainly aims at preventing sundries from entering the interior of the cabinet. At this time, if the first noise reduction accessory 2 is installed at the air inlet 11, the first air guiding cavity shell 21 is preferably installed on the air inlet cover 13, and of course, the first air guiding cavity shell 21 may also be designed to be an integral structure with the air inlet cover 13, and by designing the structure, the installation and the fixation of the first noise reduction accessory 2 are more convenient; similarly, if the second noise reduction accessory 3 is installed at the air inlet 11, the second air guiding cavity shell 31 is preferably installed on the air inlet cover 13, or the second air guiding cavity shell 31 and the air inlet cover 13 are of an integrated structure, and the second noise reduction accessory 3 is more convenient to install and fix by being designed into the structure.

In other embodiments, when the first noise reduction attachment 2 is mounted at the air inlet 11 and/or the air outlet 12, the first partition 22 is preferably a noise reduction partition made of noise reduction material, or a noise reduction material layer is formed on the first partition 22. By designing the first partition plate into the above structural form, the noise reduction effect of the first noise reduction accessory 2 is better.

Similarly, when the second noise reduction accessory 3 is installed at the air inlet 11 and/or the air outlet 12, the second partition 32 is preferably a noise reduction partition made of noise reduction material, or a noise reduction material layer is formed on the second partition 32.

It should be noted that, the number of the second partition plates 32 in the second noise reduction accessory 3 may be selected and arranged according to actual needs, and since the strip-shaped ventilation holes are formed in the second partition plates 32, the number and the distance between the second partition plates 32 may be determined according to the frequency of noise reduction required, where the structure of the multiple second partition plates 32 is mainly used for reducing middle-low frequency noise, and the noise reduction effect for high frequency noise is general.

In some embodiments, when the second noise reduction attachment 3 is installed at the air inlet 11 and/or the air outlet 12, the shape and the size of the second ventilation holes 320 corresponding to any two second partitions 32 are preferably designed to be the same. By designing the second ventilation holes 320 to have the same structure, on the one hand, the processing and manufacturing are more convenient, and on the other hand, the sufficient ventilation amount is more helpful to be ensured.

In some more specific embodiments, when the second noise reduction attachment 3 is installed at the air inlet 11 and/or the air outlet 12, the second air guiding cavity shell 31 may specifically be designed to include a first cavity shell 311 and a second cavity shell 312 connected to one end of the first cavity shell 311, the flow cross section of the first cavity shell 311 and the flow cross section of the second cavity shell 312 are arranged in a step manner, and the flow cross section of the first cavity shell 311 is larger than the flow cross section of the second cavity shell 312; the second partition plate 32 is disposed in the first chamber housing 311. The second air guide cavity shell 31 is designed into a stepped structure with one large end and one small end, so that noise reduction of noise with different frequencies can be realized, and the second air guide cavity shell 31 can be formed by bending or welding metal plates.

In a further embodiment, in order to enable the second noise reduction accessory 3 to satisfy noise reduction of more frequency bands, a resonance cavity 313 protruding toward the outer wall surface of the second cavity case 312 may be provided on the cavity wall of the second cavity case 312. The resonant cavity 313 can realize better noise reduction effect on the noise of the middle and high frequency bands so as to make up for the defect that the multiple second partition plates 32 in the first cavity shell 311 have common noise reduction effect on the noise of the high frequency. Thereby the whole structure of the second noise reduction accessory 3 has the noise reduction effect of wider frequency range; in addition, the structure can also be internally added with a silencing material, so that the noise reduction effect is improved.

In a further embodiment, the number of the resonant cavities 313 is preferably plural, and the resonant cavities are arranged at intervals in an array on the outer wall surface of the second cavity shell 312. The number, size and spacing arrangement of the resonant cavities 313 are related to the frequency of noise reduction corresponding to the requirement, and can be selected and configured according to the actual requirement. It will be understood, of course, that the above-mentioned manner of arranging in an array at intervals is merely an example of the embodiment of the present utility model, and other structural forms may be selected and arranged according to actual requirements in the practical application process, which is not limited in more detail herein.

In some more specific embodiments, when the second noise reduction accessory 3 is installed at the air inlet 11 and/or the air outlet 12, a fixing bracket 33 may be further provided on the second air guiding cavity shell 31, where the fixing bracket 33 is used for fixedly connecting with the wall of the cabinet 1; and the fixing support 33 and the second wind guiding cavity shell 31 can be of an integral structure or a split type fixed connection structure. By designing the fixing bracket 33, the installation and the fixation of the second noise reduction accessory 3 are more convenient.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

It should be appreciated that the terms "system," "apparatus," "unit," and/or "module," if used herein, are merely one method for distinguishing between different components, elements, parts, portions, or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus. The inclusion of an element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises an element.

Wherein, in the description of the embodiments of the present application, "/" means or is meant unless otherwise indicated, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, in the description of the embodiments of the present application, "plurality" means two or more than two.

In addition, the terms "first," "second," are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

If a flowchart is used in the present application, the flowchart is used to describe the operations performed by the system according to embodiments of the present application. It should be appreciated that the preceding or following operations are not necessarily performed in order precisely. Rather, the steps may be processed in reverse order or simultaneously. Also, other operations may be added to or removed from these processes.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the utility model. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. The cabinet of the electrical equipment is characterized in that a first noise reduction accessory (2) or a second noise reduction accessory (3) is arranged at an air inlet (11) of the cabinet (1), and/or a first noise reduction accessory (2) or a second noise reduction accessory (3) is arranged at an air outlet (12) of the cabinet (1);

wherein the first noise reduction accessory (2) comprises:

a first air guide cavity shell (21) for communicating the internal and external air flows of the cabinet (1);

the at least two first partition plates (22) are arranged in the first air guide cavity shell (21) and are sequentially arranged at intervals along the drainage direction of the first air guide cavity shell (21), a plurality of first ventilation holes (220) are formed in the first partition plates (22), and the first ventilation holes (220) corresponding to at least two adjacent first partition plates (22) are staggered;

the second noise reduction accessory (3) comprises:

a second air guide cavity shell (31) for communicating the internal and external air flows of the cabinet (1);

at least two second baffles (32), install in second wind-guiding chamber shell (31) and follow the drainage direction of second wind-guiding chamber shell (31) is interval arrangement in proper order, be provided with second ventilation hole (320) on second baffle (32), second ventilation hole (320) are followed the bar ventilation hole that the length direction of second baffle (32) opened, arbitrary two second ventilation hole (320) that second baffle (32) correspond are just to arranging.

2. Cabinet for electrical equipment according to claim 1, characterized in that when the first noise reduction accessory (2) is mounted at the air inlet (11) and/or the air outlet (12), the first ventilation holes (220) corresponding to any two adjacent first partition plates (22) are arranged in a staggered manner.

3. Cabinet for electrical equipment according to claim 1, characterized in that the first ventilation holes (220) are arranged at intervals in sequence in the length direction of the first partition (22) when the first noise reduction attachment (2) is mounted at the air inlet (11) and/or the air outlet (12).

4. Cabinet for electrical equipment according to claim 1, characterized in that the air inlet (11) of the cabinet (1) is provided with an air inlet hood (13);

when the first noise reduction accessory (2) is installed at the air inlet (11), the first air guide cavity shell (21) is installed on the air inlet cover (13), or the first air guide cavity shell (21) and the air inlet cover (13) are of an integrated structure;

when the second noise reduction accessory (3) is installed at the air inlet (11), the second air guide cavity shell (31) is installed on the air inlet cover (13), or the second air guide cavity shell (31) and the air inlet cover (13) are of an integrated structure.

5. Cabinet for electrical equipment according to claim 1, characterized in that the first partition (22) is a sound-damping partition made of sound-damping material or a sound-damping material layer is formed on the first partition (22) when the first noise-reducing attachment (2) is mounted at the air inlet (11) and/or the air outlet (12).

6. Cabinet for electrical equipment according to claim 1, characterized in that the second partition (32) is a sound-damping partition made of sound-damping material or that a sound-damping material layer is formed on the second partition (32) when the second noise-reducing attachment (3) is mounted at the air inlet (11) and/or the air outlet (12).

7. The cabinet of electrical equipment according to claim 1, wherein, when the second noise reduction accessory (3) is mounted at the air inlet (11) and/or the air outlet (12), the second ventilation holes (320) corresponding to any two second partitions (32) are identical in shape and size.

8. Cabinet for electrical equipment according to claim 1, characterized in that, when the second noise reducing attachment (3) is mounted at the air inlet (11) and/or the air outlet (12), the second air guiding housing (31) comprises a first housing (311) and a second housing (312) joined to one end of the first housing (311), the flow cross section of the first housing (311) and the flow cross section of the second housing (312) are arranged in steps, and the flow cross section of the first housing (311) is larger than the flow cross section of the second housing (312); the second partition plate (32) is arranged in the first cavity shell (311).

9. Cabinet for electrical equipment according to claim 8, characterized in that the second chamber housing (312) is provided with a resonance chamber (313) on its chamber wall protruding towards the outer wall surface of the second chamber housing (312).

10. Cabinet for electrical equipment according to claim 9, characterized in that the number of resonant cavities (313) is a plurality and are arranged in an array at intervals on the outer wall surface of the second housing (312).

11. Cabinet for electrical equipment according to claim 1, characterized in that, when the second noise reduction accessory (3) is mounted at the air inlet (11) and/or the air outlet (12), a fixing bracket (33) is further arranged on the second air guiding cavity shell (31), and the fixing bracket (33) is used for being fixedly connected with the cabinet wall of the cabinet (1); the fixed support (33) and the second air guide cavity shell (31) are of an integrated structure or a split type fixed connection structure.

12. An electrical device comprising a cabinet, wherein the cabinet is the cabinet of the electrical device of any one of claims 1-11.