Silencing device and electrical equipment

Abstract

The application discloses a sound-absorbing device and electrical equipment, and belongs to the field of heat dissipation. The sound-absorbing device comprises a shell, a sound-absorbing component and a guide air member. The shell comprises the guide air member and has a first air port and a second air port. The guide air member is located between the first air port and the second air port. The first air port is used for communication with an installation scene, and the second air port is used for communication with the outside world. The sound-absorbing component is slidably assembled to the guide air member. The sound-absorbing component is slidably assembled to the guide air member, and the sound-absorbing component is easy to disassemble from the shell, thereby facilitating maintenance, simple operation, time and labor saving and low cost.

Description

Technical Field

[0001] This application belongs to the field of noise reduction, and in particular relates to a noise reduction device and electrical equipment. Background Technology

[0002] As electrical equipment becomes larger, the single-unit power of some power conversion devices, such as energy storage converters and photovoltaic inverters, is constantly increasing, and the noise is also increasing. The common solution is to add sound-absorbing materials to the air inlet and outlet of the fan for noise reduction. However, the performance of the sound-absorbing materials deteriorates quickly, and maintenance and replacement are difficult, time-consuming, labor-intensive, and costly. Utility Model Content

[0003] This application aims to solve at least one of the technical problems existing in the related art. To this end, this application proposes a noise reduction device and electrical equipment that is easy to assemble and disassemble and has a good sound absorption and noise reduction effect.

[0004] In a first aspect, this application provides a noise reduction device, comprising: The housing includes an air guide component and has a first air vent and a second air vent. The air guide component is located between the first air vent and the second air vent. The first air vent is used to communicate with the installation scene, and the second air vent is used to communicate with the outside world. The sound-absorbing component is slidably mounted on the air guide.

[0005] According to the silencing device of this application, by setting the sound-absorbing component to be slidably assembled on the air guide, the sound-absorbing component and the housing are easy to disassemble and assemble, which facilitates maintenance, is simple to operate, saves time and effort, and has a low cost.

[0006] According to one embodiment of this application, the housing includes: an outer shell, forming a receiving cavity and a first air outlet and a second air outlet communicating with the receiving cavity; the air guide is installed in the receiving cavity and forms an air duct communicating between the first air outlet and the second air outlet.

[0007] According to the silencing device of this application, by setting an air guide inside the housing, the airflow is guided to the sound-absorbing component to absorb sound and reduce noise, and the noise reduction effect is good.

[0008] According to one embodiment of this application, the air guide forms a plurality of air ducts, and the distribution direction of the plurality of air ducts intersects the distribution direction between the first air outlet and the second air outlet.

[0009] According to the silencing device of this application, multiple air ducts are formed by setting air guides and intersecting the distribution direction between the first air vent and the second air vent. At the same time, the airflow at different heights through the receiving cavity is absorbed and noise is reduced, avoiding the leakage of some airflow, and the noise reduction effect is good.

[0010] According to one embodiment of this application, the air guide has a mounting cavity located at the air duct, and the sound-absorbing component is slidably assembled in the mounting cavity.

[0011] According to the silencing device of this application, by setting the air guide component with an installation cavity, it is easy to position and install the sound-absorbing component. The sound-absorbing component is slidably assembled in the installation cavity located in the air duct, and the sound absorption and noise reduction effect is good.

[0012] According to one embodiment of this application, the air guide includes an air guide plate and a bracket mounted on one side of the air guide plate, wherein the mounting cavity is formed between the bracket and the air guide plate.

[0013] According to the silencing device of this application, a bracket is provided on one side of the air guide plate to form an installation cavity for installing the sound-absorbing component between the air guide plate and the bracket, thereby enabling the air guide plate to guide the airflow to the sound-absorbing component for sound absorption and noise reduction.

[0014] According to one embodiment of this application, the housing has a drain outlet at the bottom of the side wall where the second air vent is located, and the bottom wall of the housing is inclined downwards in the direction close to the second air vent.

[0015] According to the silencing device of this application, by setting the position of the drain outlet and the inclination direction of the bottom wall, all water entering the housing through the second air inlet and water flowing towards the second air inlet are discharged, which improves the drying effect of the silencing device.

[0016] According to one embodiment of this application, the air guide plate includes a first section, a second section, and a third section that are sequentially bent and connected along the distribution direction from the first air outlet to the second air outlet, and the bracket is installed on the side of the second section facing the air duct.

[0017] According to the silencing device of this application, by setting the air guide plate into a first section, a second section, and a third section that are bent and connected in sequence, the direction of airflow can be guided as needed.

[0018] According to one embodiment of this application, the first segment is inclined upward along the direction close to the first air outlet; And / or, The second segment slopes upwards along the direction closest to the first air vent; And / or, The third segment is inclined upwards along the direction closer to the second air vent.

[0019] According to the silencing device of this application, by setting different inclination schemes for the first, second and third sections of the air guide plate, the effective length of the air duct is extended, the contact area between the airflow and the sound-absorbing components is increased, and the contact area between the sound reflection and the sound-absorbing components is increased, resulting in a better sound absorption and noise reduction effect.

[0020] According to one embodiment of this application, the second segment is provided with a hydrophobic hole near the third segment.

[0021] According to the silencing device of this application, by setting a drainage hole in the second section, the drainage hole cooperates with the inclined second section to achieve better drainage and foreign matter removal, ensuring that the inside of the silencing device is dry and has a longer service life.

[0022] According to one embodiment of this application, the second segment is provided with a first baffle on the side facing the bottom wall of the outer casing, and the first baffle is located between the hydrophobic hole and the third segment.

[0023] According to the silencing device of this application, by setting a first baffle on the side of the second section facing the bottom wall of the outer shell, water and foreign objects can be prevented from splashing, and the drainage and foreign object removal effects are good.

[0024] According to one embodiment of this application, the bracket is provided with a first opening and a second opening, the first opening being located on the side of the bracket opposite to the first air vent, and the second opening being located on the side of the bracket facing the air duct.

[0025] According to the silencing device of this application, by setting a first opening and a second opening in the bracket, the effective sound absorption area of ​​the sound-absorbing component is increased on the windward side and the air duct. At the same time, there is no opening on the top of the bracket, which has a better waterproof and moisture-proof effect.

[0026] According to one embodiment of this application, a second baffle is provided on the bottom wall of the housing near the first air vent, and the second baffle is inclined upward in the direction away from the first air vent.

[0027] According to the noise reduction device of this application, by setting a second baffle on the bottom wall of the housing, the airflow near the bottom wall of the housing can be guided to the upper air guide plate while preventing dust, and the sound absorption and noise reduction effect is good.

[0028] According to one embodiment of this application, the sound-absorbing component includes at least one of a sound-absorbing material support and a Helmholtz resonator array.

[0029] The silencing device according to this application is implemented by setting up a sound-absorbing material support and a Helmholtz resonator array in a cross combination to cope with different scenarios and different noise reduction needs, and the sound absorption and noise reduction effect is good.

[0030] According to one embodiment of this application, the sound-absorbing material support includes a support, sound-absorbing material mounted on the support, and a handle disposed at one end of the support, wherein the support is slidably assembled to the air guide.

[0031] According to the silencing device of this application, by setting the structure of the sound-absorbing material support, the sound-absorbing material support is easy to disassemble and install, and easy to maintain.

[0032] According to one embodiment of this application, the sound-absorbing component has a handle at the end away from the housing.

[0033] According to the silencing device of this application, the sound-absorbing component is easy to disassemble and maintain by providing a handle at the end of the sound-absorbing component away from the housing.

[0034] According to one embodiment of this application, there are multiple sound-absorbing components, and one end of each sound-absorbing component away from the housing is connected to a handle.

[0035] The silencing device according to this application, by connecting the ends of multiple sound-absorbing components away from the housing to a handle, facilitates batch replacement of materials or regular maintenance, and is highly convenient.

[0036] Secondly, this application provides an electrical device comprising: The noise reduction device described above; The fan is connected to the first air outlet.

[0037] According to the electrical equipment of this application, by connecting the fan of the electrical equipment to the first air outlet of the silencer, it is convenient to absorb sound and reduce noise from the electrical equipment, resulting in a better user experience and a longer lifespan.

[0038] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0039] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the electrical equipment provided in the embodiments of this application; Figure 2 This is one of the structural schematic diagrams of the silencing device provided in the embodiments of this application; Figure 3 This is a cross-sectional view of the silencing device provided in the embodiments of this application; Figure 4 This is one of the enlarged partial views of the silencing device provided in the embodiments of this application; Figure 5 This is a second enlarged view of a partial silencer provided in an embodiment of this application; Figure 6 This is a second schematic diagram of the structure of the silencing device provided in the embodiments of this application; Figure 7 This is the third schematic diagram of the structure of the silencing device provided in the embodiments of this application; Figure 8This is a schematic diagram of the structure of the sound-absorbing material support provided in the embodiments of this application; Figure 9 This is a schematic diagram of the structure of the bracket provided in the embodiment of this application.

[0040] Figure label: Electrical equipment 1000; Silencing device 1; Housing 10, first air outlet 11, second air outlet 12, mounting cavity 13, outer shell 14, receiving cavity 141, drain outlet 142, air guide 15, air guide plate 151, first section 1511, second section 1512, third section 1513, drainage hole 1514, first baffle 1515, bracket 152, first opening 1521, second opening 1522, air duct 16, second baffle 17; Sound-absorbing component 20, sound-absorbing material support 21, support 211, support rod 2111, limiting component 2112, sound-absorbing material 212, handle 213, Helmholtz resonator silencer array 22. Fan 2. Detailed Implementation

[0041] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0042] The principle of the silencing device 1 proposed in this application will be explained in detail below: In related technologies, as electrical equipment becomes larger, the single-unit power of some power conversion devices, such as energy storage converters and photovoltaic inverters, is constantly increasing, and the noise is also increasing. The common solution is to add sound-absorbing materials to the inlet and outlet of the fan for noise reduction. However, the performance of the sound-absorbing materials deteriorates quickly, maintenance and replacement are difficult, time-consuming, labor-intensive, and costly.

[0043] To solve this technical problem, this application provides a noise reduction device 1, which is described below with reference to... Figures 1-9 A noise reduction device 1 according to an embodiment of this application is described.

[0044] like Figure 2 As shown, the silencing device 1 of this application embodiment includes: a housing 10 and a sound-absorbing component 20.

[0045] The housing 10 can be made of materials such as stainless steel, aluminum alloy or galvanized steel.

[0046] In this embodiment, the housing 10 can be made of aluminum alloy, which is lightweight, has good thermal conductivity, and strong corrosion resistance.

[0047] like Figure 3 and Figure 4 As shown, the housing 10 includes an air guide 15 inside.

[0048] like Figure 3 As shown, the housing 10 has a first air vent 11 and a second air vent 12. The first air vent 11 is used to communicate with the installation scene, and the second air vent 12 is used to communicate with the outside world.

[0049] In this embodiment, the housing 10 can be a rectangular housing 10. The first air vent 11 and the second air vent 12 are located on two opposite sides of the housing 10. The first air vent 11 is used to connect with the installation scenario (such as the fan 2 of the outdoor dry-type transformer room of the energy storage converter), and the second air vent 12 is used to connect with the outside world.

[0050] It should be noted that when the installation scenario is such as the fan 2 of the outdoor dry-type transformer room of the energy storage converter, the fan 2 is installed on the inner side of the outdoor room wall panel through the fan frame, and the sound-absorbing device 1 is installed on the outer side of the outdoor room wall panel, which plays the role of ventilation, heat dissipation, noise reduction and waterproofing and dustproofing.

[0051] like Figure 3 and Figure 4 As shown, the air guide 15 is located between the first air outlet 11 and the second air outlet 12, and the airflow passes through the air guide 15.

[0052] The sound-absorbing component 20 is slidably mounted on the air guide 15, forming a sound-absorbing air duct 16 between the first air outlet 11 and the second air outlet 12.

[0053] In this embodiment, the sound-absorbing component 20 is slidably mounted on the air guide 15. When the airflow passes through the air guide 15, it passes through the sound-absorbing component 20 to form a sound-absorbing air duct 16 between the first air outlet 11 and the second air outlet 12. This reduces noise from the noise sources in the installation scenario (such as the fan 2 and transformer in the outdoor dry-type transformer room of the energy storage converter). The sound-absorbing component 20 can be slid out of the air guide 15 for maintenance (such as replacing the sound-absorbing material 212 and cleaning dust), making maintenance convenient.

[0054] The air guide 15 may be provided with a slide rail structure, and the sound absorption component 20 may be provided with a slider structure. The slider is slidably mounted on the slide rail, so that the sound absorption component 20 can slide relative to the air guide 15. In some embodiments, the air guide 15 may be a hollow cavity, and the sound absorption component 20 may be provided with a roller. The roller abuts against the inner wall of the air guide 15, and the sliding of the sound absorption component 20 relative to the air guide 15 is achieved by the roller. In some embodiments, the air guide 15 may be a hollow cavity, and the outer wall of the sound absorption component 20 directly abuts against the inner wall of the air guide 15. The sound absorption component 20 is pulled out to slide. The sliding assembly structure of the air guide 15 and the sound absorption component 20 includes, but is not limited to, the above structures.

[0055] In related technologies, as energy storage equipment develops towards larger sizes, the single-unit power of energy storage converters continues to increase, and the noise of energy storage converters also increases accordingly. A common noise reduction solution is to add sound-absorbing materials to the inlet and outlet of the fan. However, the sound-absorbing materials are exposed to high temperature and high flow rate environments for a long time, and their performance degrades quickly. In order to maintain the sound absorption effect, frequent maintenance is required. However, maintaining and replacing sound-absorbing materials is difficult, time-consuming, labor-intensive, and costly.

[0056] In this embodiment, the silencing device 1 has a housing 10 installed outside the fan 2 in the installation scene. The first air outlet 11 of the housing 10 is connected to the installation scene, and the second air outlet 12 is connected to the outside air. The sound-absorbing component 20 is slidably assembled in the air guide 15 inside the housing 10. The sound-absorbing component 20 is located between the first air outlet 11 and the second air outlet 12. When the airflow passing through the first air outlet 11 and the second air outlet 12 passes through the sound-absorbing component 20, it will be absorbed and the noise will be reduced, forming a silencing air duct 16 between the first air outlet 11 and the second air outlet 12. When the performance of the sound-absorbing component 20 deteriorates or when it needs to be cleaned and maintained, the sound-absorbing component 20 can be slid out from the air guide 15 for operation. The maintenance is convenient, the operation is simple, time-saving, labor-saving, and the cost is low.

[0057] According to the silencing device 1 provided in the embodiments of this application, by setting the sound-absorbing component 20 to be slidably assembled on the air guide 15, the sound-absorbing component 20 and the housing 10 are easy to disassemble and assemble, which facilitates maintenance, is simple to operate, saves time and effort, and has a low cost.

[0058] In some embodiments, such as Figure 2 and Figure 3 As shown, the housing 10 may include: an outer shell 14 and an air guide 15.

[0059] like Figure 3 As shown, the outer shell 14 forms a receiving cavity 141, a first air vent 11 and a second air vent 12, and the first air vent 11 and the second air vent 12 are connected to the receiving cavity 141.

[0060] In this embodiment, the outer shell 14 can be a rectangular shell 10. The first air vent 11 and the second air vent 12 are located on two opposite sides of the outer shell 14. The first air vent 11 is connected to the installation scene, and the second air vent 12 is connected to the outside. The first air vent 11 and the second air vent 12 are connected to the receiving cavity 141 inside the outer shell 14.

[0061] like Figure 3 As shown, the air guide 15 is installed in the receiving cavity 141, and the air guide 15 forms an air duct 16, which connects the first air outlet 11 and the second air outlet 12.

[0062] In this embodiment, the air guide 15 is installed in the receiving cavity 141 along the direction intersecting with the distribution direction of the first air outlet 11 and the second air outlet 12. The air guide 15 forms an air duct 16 located between the first air outlet 11 and the second air outlet 12. The sound absorption component 20 is slidably assembled on the air guide 15. When the airflow passes through the air guide 15, it passes through the sound absorption component 20, thereby absorbing sound and reducing noise.

[0063] According to the silencing device 1 provided in the embodiments of this application, by setting an air guide 15 inside the outer shell 14, the airflow is guided to flow to the sound-absorbing component 20 inside the air guide 15, and the sound absorption and noise reduction are achieved, with a good noise reduction effect.

[0064] In some embodiments, such as Figure 3 As shown, the air guide 15 can form multiple air ducts 16.

[0065] The distribution direction of the multiple air ducts 16 intersects with the distribution direction between the first air outlet 11 and the second air outlet 12.

[0066] In this embodiment, multiple air guides 15 are installed in the receiving cavity 141, and air ducts 16 are formed between the air guides 15. The multiple air ducts 16 are spaced apart along the direction that intersects the distribution direction between the first air outlet 11 and the second air outlet 12. Airflow at different heights can be guided to the sound absorption component 20 through the air guides 15 for sound absorption and noise reduction, avoiding the loss of some airflow and achieving a better noise reduction effect.

[0067] According to the silencing device 1 provided in the embodiment of this application, multiple air ducts 16 are formed by setting air guides 15 to intersect the distribution direction between the first air vent 11 and the second air vent 12, and at the same time, the airflow at different heights flowing through the receiving cavity 141 is absorbed and noise is reduced, so as to avoid missing some airflow and the noise reduction effect is good.

[0068] In some embodiments, such as Figure 3 As shown, the air guide 15 may have a mounting cavity 13.

[0069] The mounting cavity 13 is located at the air duct 16, and the sound-absorbing component 20 is slidably assembled in the mounting cavity 13.

[0070] In this embodiment, the air guide 15 has a mounting cavity 13, which facilitates the positioning and installation of the sound-absorbing component 20. The mounting cavity 13 is located at the air duct 16. The sound-absorbing component 20 is slidably assembled in the mounting cavity 13 of the air guide 15. When the airflow passes through the mounting cavity 13 of the air guide 15, it passes through the sound-absorbing component 20, resulting in a better sound absorption and noise reduction effect.

[0071] According to the silencing device 1 provided in the embodiment of this application, by setting the air guide 15 to have an installation cavity 13, it is convenient to position and install the sound absorption component 20. The sound absorption component 20 is slidably assembled in the installation cavity 13 located in the air duct 16, and the sound absorption and noise reduction effect is good.

[0072] In some embodiments, such as Figure 5 As shown, the air guide 15 may include an air guide plate 151 and a bracket 152.

[0073] In this embodiment, multiple air guide plates 151 are spaced apart in the receiving cavity 141.

[0074] like Figures 3-5 As shown, bracket 152 is installed on one side of air guide plate 151, and mounting cavity 13 is formed between bracket 152 and air guide plate 151.

[0075] In this embodiment, the bracket 152 is installed on the lower side of the air guide plate 151. The lower side of the air guide plate 151 where the bracket 152 is located and the upper side of the adjacent air guide plate 151 below form an air duct 16. When the airflow flows through the bracket 152, it will pass through the mounting cavity 13 between the bracket 152 and the air guide plate 151, so that the sound absorption component 20 can absorb and reduce the noise in the airflow.

[0076] According to the silencing device 1 provided in the embodiment of this application, a bracket 152 is provided on one side of the air guide plate 151 so as to form an installation cavity 13 for installing the sound absorption component 20 between the air guide plate 151 and the bracket 152, thereby enabling the air guide plate 151 to guide the airflow to the sound absorption component 20 for sound absorption and noise reduction.

[0077] In some embodiments, such as Figure 3 As shown, the outer casing 14 may be provided with a drain outlet 142.

[0078] The drain outlet 142 can be located at the lowest point of the housing 14.

[0079] In this embodiment, a drain outlet 142 is provided at the lowest point of the side wall of the outer casing 14 where the second air vent 12 is located. The condensate generated by the condensation of gas inside the outer casing 14 or the water accumulated due to rain or other reasons can flow out through the drain outlet 142 to avoid affecting the performance of the sound absorption component 20 and the airflow direction inside the outer casing 14.

[0080] In some embodiments, the drain outlet 142 may also be located at the lowest point of the adjacent sidewall of the housing 14 where the second air vent 12 is located, or at the bottom wall of the housing 14.

[0081] According to the silencing device 1 provided in the embodiments of this application, a drain outlet 142 is provided at the lowest point of the housing 14 to facilitate the drainage of water inside the housing 14, so as not to affect the performance of the sound-absorbing component 20 and the airflow direction inside the housing 14, thereby improving the life and stability of the silencing device 1.

[0082] In some embodiments, such as Figure 3 As shown, the outer casing 14 has a drain outlet 142 at the bottom of the side wall where the second air vent 12 is located.

[0083] The bottom wall of the outer casing 14 is inclined downward along the direction close to the second air vent 12.

[0084] In this embodiment, the outer casing 14 has a drain outlet 142 at the bottom of the side wall where the second air vent 12 is located. Water entering the outer casing 14 through the second air vent 12 and water flowing to the second air vent 12 through the first air vent 11 can both flow out through the drain outlet 142. The bottom wall of the outer casing 14 near the drain outlet 142 is inclined in the direction of downward inclination of the bottom wall of the outer casing 14 towards the second air vent 12, so that the water in the outer casing 14 can flow along the bottom wall of the outer casing 14 under the action of gravity and finally flow out of the drain outlet 142.

[0085] In some embodiments, the entire bottom wall of the housing 14 may be inclined downwards along the direction close to the second air vent 12.

[0086] It should be noted that the size of the drain outlet 142 can be set according to the actual use situation, and no specific limitation is made in this embodiment.

[0087] According to the silencing device 1 provided in the embodiments of this application, by setting the position of the drain outlet 142 and the inclined direction of the bottom wall, all the water entering the outer casing 14 through the second air inlet 12 and the water flowing to the second air inlet 12 are discharged, which has a better drying effect on the silencing device 1.

[0088] In some embodiments, such as Figure 3 As shown, the air guide plate 151 may include a first section 1511, a second section 1512, and a third section 1513.

[0089] The first segment 1511, the second segment 1512, and the third segment 1513 are connected in sequence, bending along the distribution direction from the first vent 11 to the second vent 12.

[0090] Bracket 152 is installed on the side of the second section 1512 facing the air duct 16.

[0091] In this embodiment, the first segment 1511, the second segment 1512, and the third segment 1513 are sequentially bent and connected, and the first segment 1511, the second segment 1512, and the third segment 1513 are arranged along the distribution direction from the first air outlet 11 to the second air outlet 12. The first segment 1511 is close to the first air outlet 11, and the third segment 1513 is close to the second air outlet 12. The bending direction of the first segment 1511, the second segment 1512, and the third segment 1513 is the airflow direction. A bracket 152 is provided on the side of the second segment 1512 facing the air duct 16. When the airflow flows through the bracket 152, it will pass through the mounting cavity 13 between the bracket 152 and the second segment 1512, so that the sound absorption component 20 can absorb and reduce the noise in the airflow.

[0092] Understandably, the area of ​​the second segment 1512 can be larger than that of the first segment 1511 and the third segment 1513, thereby increasing the area of ​​the sound-absorbing component 20.

[0093] According to the silencing device 1 provided in the embodiments of this application, by setting the air guide plate 151 into a first section 1511, a second section 1512 and a third section 1513 that are sequentially bent and connected, the direction of airflow can be guided according to the requirements.

[0094] In some embodiments, the bending directions of the first segment 1511, the second segment 1512, and the third segment 1513 can be multiple.

[0095] The first segment 1511, the second segment 1512, and the third segment 1513 can be at least one of the following structural forms: Firstly, the first section 1511 tilts upwards along the direction closest to the first vent 11.

[0096] In this embodiment, after the airflow from the first vent 11 enters the receiving cavity 141, it first flows downward along the first section 1511, and then passes through the second section 1512 and the third section 1513. The bending direction of the second section 1512 and the third section 1513 is not specifically limited in this embodiment.

[0097] Secondly, the second section 1512 tilts upwards along the direction close to the first vent 11.

[0098] In this embodiment, after the airflow from the first vent 11 enters the receiving cavity 141, it first passes through the first section 1511, then flows downward along the second section 1512, and finally passes through the third section 1513. The bending direction of the first section 1511 and the third section 1513 is not specifically limited in this embodiment.

[0099] Thirdly, the third segment 1513 tilts upwards along the direction close to the second vent 12.

[0100] In this embodiment, after the airflow from the first vent 11 enters the receiving cavity 141, it first passes through the first section 1511 and the second section 1512, then flows upward along the third section 1513 and flows out through the second vent 12.

[0101] Fourth, such as Figure 3 As shown, the first segment 1511 is inclined upward along the direction close to the first air vent 11, the second segment 1512 is inclined upward along the direction close to the first air vent 11, and the third segment 1513 is inclined upward along the direction close to the second air vent 12.

[0102] In this embodiment, after the airflow from the first vent 11 enters the receiving cavity 141, it first flows downward along the first section 1511, then continues to flow downward along the second section 1512, and finally flows upward along the third section 1513 and flows out through the second vent 12.

[0103] It should be noted that in this embodiment, the angle between the first segment 1511 and the third segment 1513 and the horizontal plane is greater than that of the second segment 1512. The residence time of the airflow in the second segment 1512 is greater than that in the first segment 1511 and the third segment 1513. The second segment 1512 is equipped with a sound-absorbing component 20, which has a better sound absorption and noise reduction effect.

[0104] In this embodiment, the inclined arrangement of the air guide plate 151 as a whole (first section 1511, second section 1512 and third section 1513) can play a protective role, preventing dust and foreign objects from accumulating or entering the installation scene through the first air vent 11. The first section 1511 and the third section 1513 of the air guide plate 151 are both tilted to guide the direction of airflow and sound propagation.

[0105] In some embodiments, the bending directions of the first segment 1511, the second segment 1512, and the third segment 1513 can also be any combination of two of them.

[0106] According to the silencing device 1 provided in the embodiments of this application, by setting different inclination schemes for the first section 1511, the second section 1512 and the third section 1513 of the air guide plate 151, the effective length of the air duct 16 is extended, the contact area between the airflow and the sound-absorbing component 20 is increased, and the contact area between the sound reflection and the sound-absorbing component 20 is increased, resulting in a better sound absorption and noise reduction effect.

[0107] In some embodiments, such as Figure 4 As shown, the second segment 1512 may be provided with a drainage hole 1514.

[0108] like Figure 4 As shown, the hydrophobic hole 1514 is located in the second section 1512 near the third section 1513.

[0109] In this embodiment, a row of spaced drainage holes 1514 is provided near the third section 1513 of the second section 1512. That is, the drainage holes 1514 are close to the second air outlet 12. The second section 1512 is inclined upward along the direction close to the first air outlet 11 (that is, inclined downward along the direction close to the second air outlet 12). The drainage holes 1514 cooperate with the inclined second section 1512 to achieve better drainage and foreign matter removal effects.

[0110] It is understood that the spacing and diameter of the hydrophobic holes 1514 can be set according to the actual use, and no specific restrictions are imposed in this embodiment.

[0111] According to the silencing device 1 provided in the embodiment of this application, by providing a drainage hole 1514 in the second section 1512, the drainage hole 1514 cooperates with the inclined second section 1512, the drainage and foreign matter removal effect is better, ensuring that the inside of the silencing device 1 is dry and the service life is longer.

[0112] In some embodiments, such as Figure 4 As shown, the second segment 1512 can be equipped with a first baffle 1515.

[0113] The first baffle 1515 is located on the side of the second section 1512 facing the bottom wall of the outer casing 14, and the first baffle 1515 is located between the drainage hole 1514 and the third section 1513. When water and foreign objects slide down along the second section 1512 to the drainage hole 1514, the water and foreign objects fall to the bottom wall of the outer casing 14 through the drainage hole 1514. When passing through the drainage hole 1514, some water and foreign objects may splash. After contacting the first baffle 1515, they continue to fall down to the bottom wall of the outer casing 14 and will not splash onto the side wall of the outer casing 14 or the second air vent 12.

[0114] According to the silencing device 1 provided in the embodiments of this application, by providing a first baffle 1515 on the side of the second section 1512 facing the bottom wall of the outer casing 14, water and foreign objects can be prevented from splashing, and the drainage and foreign object removal effects are good.

[0115] In some embodiments, such as Figure 5 As shown, the bracket 152 may have a first opening 1521 and a second opening 1522.

[0116] The first opening 1521 is located on the side of the bracket 152 opposite to the first air vent 11, and the second opening 1522 is located on the side of the bracket 152 facing the air duct 16.

[0117] In this embodiment, the first segment 1511 is inclined upward along the direction close to the first air vent 11, the second segment 1512 is inclined upward along the direction close to the first air vent 11, and the third segment 1513 is inclined upward along the direction close to the second air vent 12. The first opening 1521 is located on the side of the bracket 152 relative to the first air vent 11, and the second opening 1522 is located on the side of the bracket 152 facing the air duct 16. Multiple second openings 1522 are spaced apart along a direction perpendicular to the distribution direction from the first air vent 11 to the second air vent 12. The airflow enters the outer casing 14 from the first air vent 11 and first contacts the sound-absorbing component 20 at the first opening 1521. When passing through the air duct 16, it contacts the sound-absorbing component 20 at the second opening 1522. The first opening 1521 and the second opening 1522 cooperate with the inclined air guide plate 151 to increase the effective sound absorption area of ​​the sound-absorbing component 20. At the same time, there is no opening above the bracket 152, which can play a role in waterproofing and moisture-proofing the sound-absorbing component 20.

[0118] It should be noted that the bracket 152 may not have an opening at the top, which could mean that the bracket 152 has an installation groove at the top and is sealed by the second section 1512 when it is installed. Alternatively, the bracket 152 may not have an opening at the top, which could mean that the top of the bracket 152 itself is sealed.

[0119] According to the silencing device 1 provided in the embodiments of this application, by setting a first opening 1521 and a second opening 1522 in the bracket 152, the effective sound absorption area of ​​the sound-absorbing component 20 is increased on the windward side and the air duct 16. At the same time, no opening is set above the bracket 152, so the waterproof and moisture-proof effect is better.

[0120] In some embodiments, a second baffle 17 may be provided on the bottom wall of the housing 10.

[0121] like Figure 3 As shown, the second baffle 17 is located on the bottom wall of the housing 10 near the first air vent 11, and the second baffle 17 is inclined upward in the direction away from the first air vent 11.

[0122] In this embodiment, the second baffle 17 is located on the bottom wall of the housing 10 near the first air vent 11. This is the non-sloping section of the bottom wall. Multiple second baffles 17 are arranged side by side in a direction perpendicular to the distribution direction from the first air vent 11 to the second air vent 12. While preventing dust, they can guide the airflow near the bottom wall of the housing 14 to the upper air guide plate 151.

[0123] It should be noted that the tilt angle and height of the second baffle 17 can be set according to the actual use situation, and no specific restrictions are imposed in this embodiment.

[0124] According to the silencing device 1 provided in the embodiments of this application, by setting a second baffle 17 on the bottom wall of the housing 10, the airflow near the bottom wall of the housing 14 can be guided to the upper air guide plate 151 while preventing dust, and the sound absorption and noise reduction effect is good.

[0125] In some embodiments, such as Figure 2 and Figure 7 As shown, the sound-absorbing component 20 may include at least one of a sound-absorbing material support 21 and a Helmholtz resonator array 22.

[0126] The silencing device 1 may include multiple sound-absorbing material supports 21 spaced apart along the distribution direction from the top wall of the outer shell 14 to the bottom wall of the outer shell 14; the silencing device 1 may also include multiple Helmholtz resonator silencer arrays 22 spaced apart along the distribution direction from the top wall of the outer shell 14 to the bottom wall of the outer shell 14; the silencing device 1 may also include multiple sound-absorbing material supports 21 and multiple Helmholtz resonator silencer arrays 22 spaced apart along the distribution direction from the top wall of the outer shell 14 to the bottom wall of the outer shell 14, wherein the number and arrangement of the sound-absorbing material supports 21 and the Helmholtz resonator silencer arrays 22 can be specifically set according to the actual use situation, and the sound-absorbing material supports 21 and the Helmholtz resonator silencer arrays 22 can be cross-combined to cope with different scenarios and different noise reduction requirements.

[0127] like Figure 7 As shown, the sound-absorbing material support 21 can be replaced by an array 22 of multiple Helmholtz resonator silencers with different silencing frequencies to eliminate discrete noise from the fan 2 or transformer.

[0128] It should be noted that the Helmholtz resonant silencer array 22 can be designed with a resonant frequency according to the rotational speed of the fan 2, so as to match the frequency passing through its impeller, thereby eliminating discrete noise. Similarly, it can be used to reduce the noise generated by the magnetostrictive effect of the transformer.

[0129] The formula for calculating the impeller frequency of fan 2 is: (1) in, This represents the number of fan blades in fan 2. This represents the number of revolutions per minute of the shaft of fan 2.

[0130] The formula for calculating transformer noise frequency is: (2) in, Represents the harmonic order. This represents the power grid frequency; in China, it is 50Hz, while in some foreign countries it is 60Hz.

[0131] The formula for calculating the resonant absorption frequency of a muffler is: (3) in, Represents the speed of sound. Represents the radius of the neck section. Represents the volume of the cavity. Represents neck length. This represents the end correction amount; for circular holes, it is generally taken as 0.65-0.85 times the neck section radius.

[0132] For the aforementioned Helmholtz resonant silencer, the target absorption frequency is... It is known that by designing a suitable neck section radius... Cavity volume and neck length To achieve the target absorption frequency, according to formula (3), the radius of the neck section... target absorption frequency The impact is greater than the cavity volume and neck length Therefore, we consider only changing the radius of the neck section. Achieve the target absorption frequency.

[0133] Taking fan 2 as an example: It is known that fan 2 has 5 blades and a rotational speed of 2750 RPM. The frequency of its first-order impeller is calculated to be 229.16 Hz according to formula (1), and the frequencies of its second, third, and fourth-order impellers are calculated to be 458.32 Hz, 687.48 Hz, and 916.64 Hz respectively according to formula (1). Considering manufacturability and simplified shape, the neck length is usually... and cavity volume Set to a fixed value, and change the neck section radius To cope with harmonic frequencies, neck length Given a diameter of 2 mm, the volume of a single cavity is... 1.61e - 5 m 3 The neck section radius corresponding to the passing frequency of the first to fourth order impellers can be obtained. The thicknesses are 0.51mm, 1.21mm, 2.12mm and 3.3mm respectively.

[0134] Taking a transformer as an example: The magnetostrictive force transformation frequency of a transformer is known to be 100Hz, and its second, third, and fourth harmonic frequencies are 200Hz, 300Hz, and 400Hz, respectively. (Neck length) The volume of a single cavity is 2 mm. 8.45e -5 m 3 The neck section radius corresponding to the passing frequency of first to fourth order impellers The thicknesses are 0.51mm, 1.21mm, 2.12mm, and 3.3mm, respectively.

[0135] It should be noted that the combination of the Helmholtz resonant silencer array 22 and the air guide plate 151 allows the silencer duct 16 to be reused for noise reduction under different equipment and operating conditions. When dealing with different equipment, it is only necessary to measure the noise reduction frequency of the on-site fan 2 or transformer, remove the original Helmholtz resonant silencer array 22 from under the air guide plate 151, and replace it with a redesigned Helmholtz resonant silencer array 22.

[0136] According to the silencing device 1 provided in the embodiments of this application, the sound-absorbing material support 21 and the Helmholtz resonator array 22 are combined in a cross-combination to meet different scenarios and different noise reduction needs, and the sound absorption and noise reduction effect is good.

[0137] In some embodiments, such as Figure 8 As shown, the sound-absorbing material support 21 may include a support 211, sound-absorbing material 212, and a handle 213.

[0138] like Figure 8 As shown, the sound-absorbing material 212 is mounted on the bracket 211, and the handle 213 is located at one end of the bracket 211, as... Figure 2 , Figure 6 and Figure 8 As shown, the bracket 211 is slidably assembled on the air guide 15.

[0139] In this embodiment, the sound-absorbing material 212 can be directly arranged on the bracket 211. The sound-absorbing material 212 does not require adhesive backing, making maintenance and replacement convenient and reducing costs. A handle 213 is provided on the outer side of the bracket 211 wall panel for easy manual pulling of the sound-absorbing material bracket 21. Figure 9 As shown, the inner side of the wall panel of the bracket 211 includes two support rods 2111 for supporting the sound-absorbing material 212. Multiple limiting members 2112 can be provided on the support rods 2111 for limiting and fixing the sound-absorbing material 212.

[0140] According to the silencing device 1 provided in the embodiments of this application, by setting the structure of the sound-absorbing material support 21, the sound-absorbing material support 21 is easy to disassemble and install, and easy to maintain.

[0141] In some embodiments, such as Figure 6 and Figure 8 As shown, the sound-absorbing component 20 can be equipped with a handle 213.

[0142] The handle 213 is located at the end of the sound-absorbing assembly 20 away from the housing 10.

[0143] In this embodiment, the handle 213 is located at the end of the sound-absorbing component 20 away from the housing 10. Multiple sound-absorbing components 20 are spaced apart along the distribution direction from the top wall to the bottom wall of the housing 14. Each sound-absorbing component 20 has its own handle 213. When the sound-absorbing component 20 needs maintenance, it can be removed separately for maintenance, which is easy to operate and does not affect the overall sound absorption effect.

[0144] According to the silencing device 1 provided in the embodiments of this application, by providing a handle 213 at the end of the sound-absorbing component 20 away from the housing 10, the sound-absorbing component 20 is easy to disassemble and maintain.

[0145] In some embodiments, there may be multiple sound-absorbing components 20.

[0146] like Figure 6 As shown, the ends of the multiple sound-absorbing components 20 away from the housing 10 are connected to the handle 213.

[0147] In this embodiment, multiple sound-absorbing components 20 are spaced apart along the distribution direction from the top wall to the bottom wall of the outer shell 14, and the ends of the multiple sound-absorbing components 20 away from the shell 10 are connected together. The handle 213 is located on the outer surface of the end of the sound-absorbing component 20 away from the shell 10. Multiple sound-absorbing components 20 share a handle 213. When the sound-absorbing components 20 need maintenance, all the sound-absorbing components 20 can be removed together for maintenance, which is convenient for batch replacement of materials or regular maintenance and has high convenience.

[0148] The silencing device 1 provided in the embodiments of this application connects one end of a plurality of sound-absorbing components 20 away from the housing 10 to a handle 213, which facilitates batch replacement of materials or regular maintenance and is highly convenient.

[0149] This application also provides an electrical device 1000.

[0150] like Figure 1 As shown, the electrical equipment 1000 includes: a silencer 1 and a fan 2.

[0151] The silencing device 1 is the silencing device 1 described in the above embodiment.

[0152] Fan 2 is connected to the first air outlet 11.

[0153] In this embodiment, the fan 2 is installed inside the electrical equipment 1000 via a fan frame, and the silencer 1 is installed on the outside of the electrical equipment 1000. The fan 2 is connected to the first air outlet 11 of the silencer 1, which serves to provide ventilation, heat dissipation, noise reduction, and waterproofing and dustproofing.

[0154] The sound-absorbing component 20 is slidably mounted in the mounting cavity 13. When the airflow passes through the mounting cavity 13, it passes through the sound-absorbing component 20 to form a sound-absorbing air duct 16 between the first air outlet 11 and the second air outlet 12, which absorbs sound and reduces noise for the fan 2 of the electrical equipment 1000. The sound-absorbing component 20 can be slid out of the mounting cavity 13 for maintenance (such as replacing the sound-absorbing material 212 and cleaning dust), making maintenance convenient.

[0155] According to the embodiment of this application, the electrical equipment 1000 is connected to the first air outlet 11 of the silencing device 1 by setting the fan 2 of the electrical equipment 1000 to facilitate sound absorption and noise reduction of the electrical equipment 1000. The electrical equipment 1000 has a better user experience and a longer lifespan.

[0156] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0157] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0158] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0159] In the description of this application, "multiple" means two or more.

[0160] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0161] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0162] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0163] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A noise reduction device, characterized in that, include: The housing (10) includes an air guide (15) and has a first air vent (11) and a second air vent (12). The air guide (15) is located between the first air vent (11) and the second air vent (12). The first air vent (11) is used to communicate with the installation scene, and the second air vent (12) is used to communicate with the outside. The sound-absorbing component (20) is slidably mounted on the air guide (15).

2. The silencing device according to claim 1, characterized in that, The housing (10) includes: an outer shell (14), forming a receiving cavity (141) and a first air vent (11) and a second air vent (12) communicating with the receiving cavity (141), and the air guide (15) is installed in the receiving cavity (141) and forms an air duct (16) communicating between the first air vent (11) and the second air vent (12).

3. The silencing device according to claim 2, characterized in that, The air guide (15) forms a plurality of air ducts (16), and the distribution direction of the plurality of air ducts (16) intersects the distribution direction between the first air outlet (11) and the second air outlet (12).

4. The silencing device according to claim 2, characterized in that, The air guide (15) has a mounting cavity (13) located at the air duct (16), and the sound-absorbing component (20) is slidably assembled in the mounting cavity (13).

5. The silencing device according to claim 4, characterized in that, The air guide (15) includes an air guide plate (151) and a bracket (152) installed on one side of the air guide plate (151), and the mounting cavity (13) is formed between the bracket (152) and the air guide plate (151).

6. The silencing device according to claim 2, characterized in that, The outer casing (14) has a drain outlet (142) at the bottom of the side wall where the second air vent (12) is located, and the bottom wall of the outer casing (14) is inclined downward along the direction close to the second air vent (12).

7. The silencing device according to claim 5, characterized in that, The air guide plate (151) includes a first section (1511), a second section (1512) and a third section (1513) that are sequentially bent and connected along the distribution direction from the first air outlet (11) to the second air outlet (12). The bracket (152) is installed on the side of the second section (1512) facing the air duct (16).

8. The silencing device according to claim 7, characterized in that, The first segment (1511) slopes upward along the direction close to the first air vent (11); And / or, The second segment (1512) slopes upwards along the direction close to the first air vent (11); And / or, The third segment (1513) is inclined upward along the direction close to the second air outlet (12).

9. The silencing device according to claim 7, characterized in that, The second segment (1512) is provided with a drainage hole (1514) near the third segment (1513).

10. The silencing device according to claim 9, characterized in that, The second section (1512) has a first baffle (1515) on the side facing the bottom wall of the outer shell (14), and the first baffle (1515) is located between the water-draining hole (1514) and the third section (1513).

11. The silencing device according to claim 5, characterized in that, The bracket (152) is provided with a first opening (1521) and a second opening (1522). The first opening (1521) is located on the side of the bracket (152) opposite to the first air vent (11), and the second opening (1522) is located on the side of the bracket (152) facing the air duct (16).

12. The silencing device according to claim 1, characterized in that, The bottom wall of the housing (10) is provided with a second baffle (17) near the first air vent (11), and the second baffle (17) is inclined upward in the direction away from the first air vent (11).

13. The silencing device according to any one of claims 1-12, characterized in that, The sound-absorbing component (20) includes at least one of a sound-absorbing material support (21) and a Helmholtz resonator array (22).

14. The silencing device according to claim 13, characterized in that, The sound-absorbing material support (21) includes a support (211), a sound-absorbing material (212) installed on the support (211), and a handle (213) provided at one end of the support (211). The support (211) is slidably assembled to the air guide (15).

15. The silencing device according to any one of claims 1-12, characterized in that, The sound-absorbing component (20) has a handle (213) at the end away from the housing (10).

16. The silencing device according to any one of claims 1-12, characterized in that, There are multiple sound-absorbing components (20), and one end of each sound-absorbing component (20) away from the housing (10) is connected to the handle (213).

17. An electrical device, characterized in that, include: The silencing device (1) as described in any one of claims 1-16; The fan (2) is connected to the first air outlet (11).

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