Noise reduction device and method for a box transformer

Abstract

The application discloses a noise reduction device and a noise reduction method for a box-type transformer, which comprises a first cylinder, a second cylinder and a noise reduction assembly; the first cylinder and the second cylinder are communicated to form a heat dissipation channel, the heat dissipation channel has a first opening and a second opening, the first opening is located at one end of the first cylinder, the second opening is located at one end of the second cylinder, and the first cylinder and the second cylinder form an included angle; one end of the first cylinder is used for being connected with a heat dissipation port of the box-type transformer, and the first opening corresponds to the heat dissipation port; the noise reduction assembly comprises a reflecting member, the reflecting member is connected to one end of the second cylinder, the reflecting member is used for reflecting noise back to the heat dissipation channel, a gap is formed between the reflecting member and the second cylinder, and the gap is used for discharging heat of the heat dissipation channel. The noise reduction device is applied to the box-type transformer, can dissipate heat of the box-type transformer, can reflect noise emitted in the box-type transformer, increases noise propagation time in the heat dissipation channel, and thus the noise reduction effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of box-type transformers, and in particular to a noise reduction device and method for box-type transformers. Background Technology

[0002] Box-type transformers are a core component of urban and rural low-voltage power distribution networks. With increasing demands for improved living environments, the noise problem from box-type transformers in urban areas has become a growing concern year by year. Transformer noise is low-frequency noise with extremely strong penetrating power, decays very slowly, and has a long sound wave, easily penetrating obstacles and traveling long distances, even passing through walls to reach the ear, thus having a significant impact on human health.

[0003] Noise reduction is usually achieved by installing noise reduction materials on the box-type transformer. However, when the box-type transformer has a high load and high heat dissipation requirements, the noise reduction materials will affect the heat dissipation effect of the box-type transformer. If through holes are directly opened on the box-type transformer for heat dissipation, noise will be transmitted through the through holes, affecting the noise reduction effect. Summary of the Invention

[0004] Therefore, it is necessary to provide a noise reduction device that can both dissipate heat from the box-type transformer and reduce noise from it.

[0005] In addition, it is necessary to provide a noise reduction method for reducing noise in a box-type transformer using the aforementioned noise reduction device.

[0006] To address the aforementioned problems, the present invention provides a noise reduction device, wherein the box-type transformer has a heat dissipation port for heat dissipation, and includes a first cylinder, a second cylinder, and a noise reduction component;

[0007] The first cylinder and the second cylinder are connected to form a heat dissipation channel. The heat dissipation channel has a first opening and a second opening. The first opening is located at one end of the first cylinder, and the second opening is located at one end of the second cylinder. The first cylinder and the second cylinder form an angle.

[0008] One end of the first cylinder is used to connect to the heat dissipation port of the box-type transformer, and the first opening corresponds to the heat dissipation port;

[0009] The noise reduction component includes a reflector connected to one end of the second cylinder. The reflector is used to reflect noise back to the heat dissipation channel. A gap is formed between the reflector and the second cylinder, and the gap is used to dissipate heat from the heat dissipation channel.

[0010] In addition, it is necessary to provide a box-type transformer equipped with the aforementioned noise reduction device.

[0011] In one embodiment, the first cylinder includes a first outer cylinder and a first inner cylinder disposed within the first outer cylinder, and a first receiving space is formed between the first outer cylinder and the first inner cylinder; the second cylinder includes a second outer cylinder and a second inner cylinder disposed within the second outer cylinder, and a second receiving space is formed between the second outer cylinder and the second inner cylinder.

[0012] The noise reduction component further includes a first sound-absorbing component and a second sound-absorbing component, wherein the first sound-absorbing component is disposed in the first receiving cavity and the second sound-absorbing component is disposed in the second receiving cavity.

[0013] In one embodiment, the reflector includes a mounting cover and a reflective block. The mounting cover is connected to the end of the second cylinder to close the second opening and block the noise transmitted to the second opening. The reflective block corresponds to the second opening and reflects the noise transmitted to the second opening to the second receiving cavity.

[0014] The side wall of the mounting cover is provided with a notch, and a gap is formed between the reflective block and the second cylinder. The notch is used to discharge heat passing through the gap.

[0015] In one embodiment, the reflector block has a protrusion that extends from the center of the reflector block toward one end near the second opening, and the side of the protrusion is recessed to form a curved surface that diffuses from the center of the reflector block toward the outer periphery of the reflector block, the curved surface being used to reflect the noise transmitted to the second opening to the second receiving cavity.

[0016] In one embodiment, the mounting cover includes a connecting portion, an extension portion, and a top cover connected in sequence. The connecting portion is connected to one end of the second outer cylinder, and the extension portion extends horizontally toward the end away from the second outer cylinder. Both the extension portion and the connecting portion are cylindrical. The notch is formed on the extension portion, and the top cover is connected to the end of the extension portion away from the second outer cylinder and seals the end of the extension portion away from the second outer cylinder.

[0017] In one embodiment, the area of ​​the second inner cylinder corresponding to the first inner cylinder is provided with a reflective surface, and the reflective surface is a smooth curved surface;

[0018] The reflective surface is used to reflect noise that will enter the heat dissipation channel from the first opening back to the first receiving cavity.

[0019] In one embodiment, the number of the second openings is two, with another second opening located at the other end of the second cylinder, such that the two second openings are positioned opposite each other at both ends of the second cylinder, and the first cylinder is connected to the area between the two second openings of the second cylinder.

[0020] In one embodiment, the first cylinder is connected to the central region of the second cylinder, and the included angle is 90°.

[0021] In one embodiment, the noise reduction device further includes a heat dissipation component connected to one end of the first cylinder near the first opening, the heat dissipation component being used to allow the heat from the box-type transformer to enter the heat dissipation channel.

[0022] In one embodiment, a noise reduction method for a box-type transformer involves installing the aforementioned noise reduction device onto the box-type transformer. The box-type transformer includes a box body, a noise reduction layer, and a protective mesh. The noise reduction layer is connected to the inner wall of the box body, and a heat dissipation vent is provided on one side of the box body. The noise reduction device is installed at the heat dissipation vent.

[0023] The protective net is connected to the box to form a space that can accommodate the noise reduction layer;

[0024] The noise reduction layer includes a polymer sound insulation layer and a sound absorption layer stacked together. The polymer sound insulation layer is attached to the inner wall of the enclosure, and the sound absorption layer is attached to the polymer sound insulation layer.

[0025] By implementing the embodiments of the present invention, the noise reduction device connects the box-type transformer, the first cylinder with the first opening, and the second cylinder with the second opening in sequence, thereby connecting the box-type transformer with the outside, so that the heat of the box-type transformer can be discharged through the gap formed between the second opening and the reflector, thereby achieving the purpose of dissipating the heat of the box-type transformer to the outside.

[0026] Connecting the first cylinder and the second cylinder at a certain angle allows noise to be reflected after entering the heat dissipation channel through the first inlet. The noise is reflected in the area corresponding to the inner wall of the second cylinder and the first cylinder. Reflecting the noise during the transmission process increases the noise propagation time, thereby reducing noise leakage and achieving the effect of noise reduction.

[0027] By setting up reflectors, noise can be prevented from being transmitted directly from the second opening, and the noise transmitted along the heat dissipation channel can be reflected into the heat dissipation channel, returning the noise back into the heat dissipation channel, thereby increasing the propagation time of the noise in the heat dissipation channel, and weakening the noise through continuous reflection, so as to achieve the effect of noise reduction.

[0028] Therefore, applying such a noise reduction device to a box-type transformer can not only dissipate heat from the box-type transformer, but also increase the propagation time of noise in the heat dissipation channel by reflecting the noise transmitted from inside the box-type transformer, thereby achieving the effect of noise reduction. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] in:

[0031] Figure 1 This is a schematic diagram of the structure of a noise reduction device according to one embodiment.

[0032] Figure 2 For example Figure 1 An exploded view of the noise reduction device shown.

[0033] Figure 3 For example Figure 1 The diagram shows the internal structure of the noise reduction device.

[0034] Figure label:

[0035] 10-First cylinder, 11-First outer cylinder, 12-First inner cylinder, 14-First receiving space, 16-First opening;

[0036] 20-Second cylinder, 21-Second outer cylinder, 22-Second inner cylinder, 222-Baffle, 24-Second receiving space, 26-Second opening, 28-Protruding ring;

[0037] 30-Noise reduction component, 32-First sound-absorbing component, 34-Second sound-absorbing component, 36-Reflector, 362-Mounting cover, 3622-Connecting part, 3624-Extension part, 36242-Notch, 3626-Top cover, 364-Reflective block, 3644-Protrusion; 40-Heat dissipation component. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indications will also change accordingly.

[0040] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of the stated features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0041] Combination Figures 1-3 The present invention discloses a noise reduction device and a noise reduction method for a box-type transformer. The noise reduction device includes a first cylinder 10, a second cylinder 20, and a noise reduction component 30. The first cylinder 10 and the second cylinder 20 are connected to form a heat dissipation channel. The heat dissipation channel has a first opening 16 and a second opening 26. The first opening 16 is located at one end of the first cylinder 10, and the second opening 26 is located at one end of the second cylinder 20. The first cylinder 10 and the second cylinder 20 form an angle.

[0042] One end of the first cylinder 10 is used to connect to the heat dissipation port of the box-type transformer, and the first opening 16 corresponds to the heat dissipation port.

[0043] The noise reduction component 30 includes a reflector 36 connected to one end of the second cylinder 20. The reflector 36 is used to reflect noise back to the heat dissipation channel. A gap is formed between the reflector 36 and the second cylinder 20, which is used to dissipate heat from the heat dissipation channel.

[0044] Specifically, the first cylinder 10 and the second cylinder 20 are connected to a heat dissipation channel, and the first cylinder 10 and the second cylinder 20 form an angle. The heat dissipation channel is not a straight channel, but a channel with corners. When heat is discharged, such a heat dissipation channel will not affect the heat transfer. When sound waves are transmitted, such as noise, the corners will emit sound waves, thereby reducing the size of the sound waves. As a result, the noise will gradually weaken during transmission, thereby achieving the effect of noise reduction.

[0045] The first opening 16 is the noise inlet, and the second opening 26 is the noise outlet. By setting a reflector 36 at the noise outlet, the noise can be returned to the heat dissipation channel, thereby reducing the noise transmitted from the second opening 26.

[0046] Since a gap is formed between the reflector 36 and the second cylinder 20, the second opening 26 is partially covered by the reflector 36, and this gap can be used for heat dissipation.

[0047] In implementing this embodiment of the invention, the noise reduction device connects a box-type transformer, a first cylinder 10 with a first opening 16, and a second cylinder 20 with a second opening 26 in sequence. This allows the box-type transformer to be connected to the outside, so that the heat of the box-type transformer can be discharged through the gap formed between the second opening 26 and the reflector 36, thereby dissipating the heat of the box-type transformer to the outside. Connecting the first cylinder 10 and the second cylinder 20 at a certain angle allows noise to be reflected in the area corresponding to the first cylinder 10 on the inner wall of the second cylinder 20 after entering the heat dissipation channel through the first inlet. Reflecting the noise during the transmission process increases the propagation time of the noise, thereby reducing noise leakage and achieving the effect of noise reduction.

[0048] By setting the reflector 36, noise can be prevented from being transmitted directly from the second opening 26, and the noise transmitted along the heat dissipation channel can be reflected into the heat dissipation channel, returning the noise back into the heat dissipation channel, thereby increasing the propagation time of the noise in the heat dissipation channel, and weakening the noise through continuous reflection, so as to achieve the effect of noise reduction.

[0049] Therefore, applying such a noise reduction device to a box-type transformer can not only dissipate heat from the box-type transformer, but also increase the propagation time of noise in the heat dissipation channel by reflecting the noise transmitted from inside the box-type transformer, thereby achieving the effect of noise reduction.

[0050] Preferably, the first cylinder 10 includes a first outer cylinder 11 and a first inner cylinder 12 disposed within the first outer cylinder 11, and a first receiving space 14 is formed between the first outer cylinder 11 and the first inner cylinder 12; the second cylinder 20 includes a second outer cylinder 21 and a second inner cylinder 22 disposed within the second outer cylinder 21, and a second receiving space 24 is formed between the second outer cylinder 21 and the second inner cylinder 22; the noise reduction assembly 30 further includes a first sound-absorbing element 32 and a second sound-absorbing element 34, the first sound-absorbing element 32 being disposed within the first receiving cavity, and the second sound-absorbing element 34 being disposed within the second receiving cavity.

[0051] Specifically, the first sound-absorbing component 32 is accommodated in the first accommodating space 14, and the second sound-absorbing component 34 is accommodated in the second accommodating space 24, with the first cylinder 10 and the second cylinder 20 forming an angle. Therefore, after noise enters the heat dissipation channel through the first inlet, the noise is reflected by the inner wall of the second inner cylinder 22 and the area corresponding to the first cylinder 10. The noise is reflected back to the first accommodating cavity by the inner wall of the second inner cylinder 22, thus allowing the noise reflected by the inner wall of the second inner cylinder 22 to be absorbed by the first sound-absorbing component 32. Furthermore, the reflection of noise during its transmission increases the noise propagation time, and combined with the first sound-absorbing component 32 and the second sound-absorbing component 34, the noise is absorbed to a greater extent, thereby reducing noise leakage and achieving a noise reduction effect.

[0052] Furthermore, by providing the reflector 36, noise can be prevented from being directly transmitted from the second opening 26. When noise enters the heat dissipation channel along the first opening 16 and is transmitted to one end of the second inner cylinder 22, the reflector 36 reflects the noise transmitted along the heat dissipation channel toward the heat dissipation channel and reflects the noise to the second receiving cavity so that the noise can be absorbed by the second sound-absorbing member 34 in the second receiving cavity. In addition, reflecting the noise toward the heat dissipation channel can also increase the noise propagation time and reduce the noise. Increasing the noise propagation time makes it easier for the first sound-absorbing member 32 and the second sound-absorbing member 34 to absorb the noise to a greater extent.

[0053] Therefore, reflecting the sound waves generated by noise can directly reduce the noise, and can also increase the time that the noise is transmitted in the heat dissipation channel to absorb the noise to a greater extent in conjunction with the first sound-absorbing component 32 and the second sound-absorbing component 34. Ultimately, both can reduce the noise transmitted from the heat dissipation channel and achieve the effect of noise reduction.

[0054] Preferably, both the first sound-absorbing component 32 and the second sound-absorbing component 34 are calming sound-absorbing cotton.

[0055] Preferably, the noise reduction device further includes a heat dissipation component 40, which is connected to one end of the first cylinder 10 near the first opening 16. The heat dissipation component 40 is used to allow the heat from the box-type transformer to enter the heat dissipation channel.

[0056] The heat dissipation component 40 is connected to the end of the first cylinder 10 near the first opening 16. The heat dissipation component 40 is a cooling fan. The cooling fan can quickly dissipate the heat inside the box transformer through the heat dissipation port and the first opening 16 to the heat dissipation channel, and then discharge it from the notch 36242 after passing through the heat dissipation channel.

[0057] The heat dissipation component 40 can accelerate the flow of heat and dissipate heat quickly.

[0058] Preferably, the reflector 36 includes a mounting cover 362 and a reflector block 364. The mounting cover 362 is connected to the end of the second cylinder 20, thereby closing the second opening 26 to block noise transmitted to the second opening 26. The reflector block 364 corresponds to the second opening 26, thereby reflecting the noise transmitted to the second opening 26 to the second receiving cavity. The side wall of the mounting cover 362 is provided with a notch 36242, and a gap is formed between the reflector block 364 and the second cylinder 20. The notch 36242 is used to discharge heat passing through the gap.

[0059] Specifically, the mounting cover 362 is connected to the end of the second cylinder 20 where the second opening 26 is located, and can block the second opening 26, thereby blocking the noise transmitted from the first opening 16 to the second opening 26 along the heat dissipation channel. In conjunction with the reflector block 364, the noise transmitted to the second opening 26 is reflected to the second receiving cavity, so that the noise is absorbed by the second sound-absorbing component 34 in the second receiving cavity.

[0060] Since the mounting cover 362 blocks the second opening 26, a notch 36242 is provided on the mounting cover 362 so that the heat entering the heat dissipation channel from the first opening 16 can pass through the gap and be discharged from the notch 36242.

[0061] When noise and heat enter the heat dissipation channel through the first opening 16, they will pass through the areas corresponding to the first cylinder 10 and the second cylinder 20 in sequence. Compared with the second opening 26 directly corresponding to the second cylinder 20, the notch 36242 on the side of the mounting cover 362 will not affect the heat dissipation, but the notch 36242 on the side will reduce the noise discharge to a certain extent. In addition, the mounting cover 362 and the reflector block 364 can also reflect the noise. Therefore, such a reflector 36 can reduce the noise transmission, thereby achieving the noise reduction effect.

[0062] Therefore, by setting up the reflector 36, the propagation of noise can be reduced without affecting heat dissipation.

[0063] Preferably, the first outer cylinder 11, the second outer cylinder 21, the first inner cylinder 12, and the second inner cylinder 22 are all cylindrical, the top cover 3626 is a circular plate, and the extension 3624 is cylindrical. The curvature of the notch 36242 is π, and when the noise reduction device is installed at the heat dissipation port of the box-type transformer, the notch 36242 faces downward to prevent rainwater from entering through the notch 36242.

[0064] Furthermore, the reflector block 364 is provided with a protrusion 3644, which extends from the center of the reflector block 364 toward one end near the second opening 26, and the side of the protrusion 3644 is recessed, thereby forming a curved surface that diffuses from the center of the reflector block 364 toward the outer periphery of the reflector block 364. The curved surface is used to reflect noise transmitted to the second opening 26 to the second receiving cavity.

[0065] Specifically, the protrusion 3644 extends from the central region of the reflector block 364 toward the heat dissipation channel, and the side of the protrusion 3644 is recessed toward the central region of the reflector block, so that the side of the reflective surface facing the second opening 26 is curved, and the curved surface spreads from the end of the protrusion 3644 toward the outer periphery of the reflector block 364.

[0066] The curved surface can reflect noise entering the heat dissipation channel from the first opening 16 and transmitted to the second opening 26 toward the second receiving cavity. A large amount of noise is absorbed by the second sound-absorbing element 34 in the second receiving cavity; a small amount of noise will be reflected back to the heat dissipation channel and collide with the first inner cylinder 12 or the second inner cylinder 22, thereby resonating with the first inner cylinder 12 or the second inner cylinder 22 to achieve the effect of noise reduction. Furthermore, the noise being reflected back into the heat dissipation channel indirectly increases the propagation time of the noise in the heat dissipation channel, making it easier for the first sound-absorbing element 32 and the second sound-absorbing element 34 to absorb a large amount of noise.

[0067] Furthermore, the protrusion 3644 is a conical protrusion 3644, and the side of the conical protrusion 3644 is concave inward.

[0068] The conical protrusion 3644 makes the side of the reflector block 364 facing the second opening 26 a sharp curved surface. The sharp curved surface can reflect noise in all directions. The diffuse reflection of noise can reduce the energy of the noise sound wave, thereby achieving the effect of noise reduction.

[0069] Preferably, the reflector block 364 and the end of the second outer cylinder 21 are located on the same plane, so that the reflector block 364 is disposed in the heat dissipation channel.

[0070] In detail, given the limited space for the heat dissipation channel within the second cylinder 20, the protrusion 3644 is made as long as possible.

[0071] This allows the protrusion 3644 to extend as far into the heat dissipation channel as possible, so as to reflect a large amount of noise, and so that the first sound-absorbing component 32 and the second sound-absorbing component 34 can absorb more noise to a greater extent.

[0072] Preferably, the mounting cover 362 includes a connecting portion 3622, an extension portion 3624, and a top cover 3626 connected in sequence. The connecting portion 3622 is connected to one end of the second outer cylinder 21. The extension portion 3624 extends horizontally toward the end away from the second outer cylinder 21. Both the extension portion 3624 and the connecting portion 3622 are cylindrical. A notch 36242 is formed on the extension portion 3624. The top cover 3626 is connected to the end of the extension portion 3624 away from the second outer cylinder 21 and seals the end of the extension portion 3624 away from the second outer cylinder 21.

[0073] Specifically, the connecting part 3622 is fitted onto the end of the second outer cylinder 21, the extension part 3624 extends horizontally toward the end away from the second outer cylinder 21, and the top cover 3626 seals the end of the extension part 3624, so that the heat in the heat dissipation channel can only be discharged from the notch 36242 opened along the extension part 3624.

[0074] Compared to the second opening 26 directly opposite the heat dissipation channel, the heat dissipation effect is almost the same through the notch 36242 on the side of the extension 3624; however, in terms of noise propagation, the top cover 3626 will reflect the sound waves generated by the noise back into the heat dissipation channel, which can achieve a certain noise reduction effect, thus reducing the noise transmitted from the notch 36242.

[0075] Preferably, the inner wall of the second outer cylinder 21 is provided with a protruding ring 28, the protruding ring 28 is disposed at the end of the second outer cylinder 21, and the outer sidewall of the protruding ring 28 is connected to the inner sidewall of the second outer cylinder 21.

[0076] The length of the second inner cylinder 22 is less than the length of the second outer cylinder 21, so that the end of the second inner cylinder 22 near the second opening 26 is spaced apart from the convex ring 28.

[0077] Specifically, the convex ring 28 is disposed inside the second outer cylinder 21 and connected to the end of the second outer cylinder 21. It can block the end of the notch 36242 near the heat dissipation channel, preventing noise from being transmitted directly from the notch 36242 through the heat dissipation channel. It can block the sound waves generated by the noise and achieve the effect of noise reduction.

[0078] The length of the second inner cylinder 22 is less than the length of the second outer cylinder 21, which can prevent the convex ring 28 from abutting against the second inner cylinder 22 and prevent the convex ring 28 from affecting the noise sound waves reflected by the reflector 36 from entering the second receiving cavity and being absorbed by the second sound-absorbing member 34.

[0079] Preferably, the area of ​​the second inner cylinder 22 corresponding to the first inner cylinder 12 is provided with a reflective surface, which is a smooth curved surface; the reflective surface is used to reflect noise entering the heat dissipation channel from the first opening 16 to the first receiving cavity.

[0080] Specifically, at the connection between the first outer cylinder 11 and the second outer cylinder 21, the side of the second inner cylinder 22 opposite to the first inner cylinder 12 is a smooth curved surface. The smooth curved surface can reflect the sound waves of noise entering from the first opening 16, so that the noise will be reflected to the first receiving cavity, which facilitates the absorption of noise by the first sound-absorbing element 32 in the first receiving cavity.

[0081] At the same time, the noise sound waves entering from the first opening 16 are reflected in the direction of the first opening 16, which can reduce the noise transmitted from the noise reduction device, so that the noise reduction device can reduce the noise transmission while achieving the heat dissipation effect.

[0082] Preferably, there are two second openings 26, with the other second opening 26 located at the other end of the second cylinder 20, so that the two second openings 26 are arranged opposite to each other at both ends of the second cylinder 20, and the first cylinder 10 is connected to the area between the two second openings 26 of the second cylinder 20.

[0083] Furthermore, the first cylinder 10 is connected to the central region of the second cylinder 20 at an angle of 90°.

[0084] Specifically, the second cylinder 20 has a second opening 26 at both ends, and the first cylinder 10 is connected to the central area of ​​the second cylinder 20, thereby forming a T-shaped noise reduction device, and the heat dissipation channel is also T-shaped.

[0085] The overall T-shaped noise reduction device has a cylindrical structure. Heat enters the heat dissipation channel through the first opening 16 and is discharged through the notches 36242 on the side wall of the reflector 36 at the two second openings 26.

[0086] When the noise is cooled by the noise reduction device, the noise will also enter the heat dissipation channel. However, the noise will be diffusely reflected in such a heat dissipation channel. By continuously reflecting the sound waves generated by the noise, the time for the noise to propagate in the heat dissipation channel can be increased, so that the first sound-absorbing component 32 and the second sound-absorbing component 34 can absorb the noise to a greater extent, thereby achieving the effect of noise reduction.

[0087] Preferably, on the inner wall of the second inner cylinder 22, a baffle is provided around both ends of the smooth curved surface. The baffle 222 is circular, and the circular baffle 222 is inclined towards the end closer to the second opening 26. The opposite sides of the two circular baffles 222 are curved, thereby reflecting the noise toward the area corresponding to the first receiving cavity.

[0088] A noise reduction method for a box-type transformer involves installing the aforementioned noise reduction device onto the box-type transformer. The box-type transformer includes a box, a noise reduction layer, and a protective mesh. The noise reduction layer is connected to the inner wall of the box. A heat dissipation vent is provided on one side of the box, and the noise reduction device is installed at the heat dissipation vent.

[0089] The protective netting is connected to the enclosure to form a space that can accommodate the noise reduction layer.

[0090] The noise reduction layer consists of a layered polymer sound insulation layer and a sound absorption layer. The polymer sound insulation layer is pasted onto the inner wall of the enclosure, and the sound absorption layer is pasted onto the polymer sound insulation layer.

[0091] Specifically, the box-type transformer uses an internal polymer sound insulation layer and a sound absorption layer to reduce noise. The polymer sound insulation layer and the sound absorption layer are protected by a protective net so that the noise reduction and sound insulation layer inside the box-type transformer is not easily damaged and has a long service life.

[0092] Installing such a noise reduction device at the heat dissipation vent of a box-type transformer can dissipate heat from the sealed box-type transformer. Furthermore, while dissipating heat from the box-type transformer, the installation of such a noise reduction device at the heat dissipation vent can prevent a large amount of low-frequency noise inside the box-type transformer from leaking out of the heat dissipation vent.

[0093] Therefore, installing such a noise reduction device at the heat dissipation port of the box-type transformer can achieve the same noise reduction effect as directly installing the heat dissipation component 40 at the heat dissipation port.

[0094] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A noise reduction device for a box-type transformer, the box-type transformer having a heat dissipation vent for heat dissipation, characterized in that, It includes a first cylinder, a second cylinder, and noise reduction components; The first cylinder and the second cylinder are connected to form a heat dissipation channel. The heat dissipation channel has a first opening and a second opening. The first opening is located at one end of the first cylinder, and the second opening is located at one end of the second cylinder. The first cylinder and the second cylinder form an angle. One end of the first cylinder is used to connect to the heat dissipation port of the box-type transformer, and the first opening corresponds to the heat dissipation port; The noise reduction component includes a reflector connected to one end of the second cylinder. The reflector is used to reflect noise back to the heat dissipation channel. A gap is formed between the reflector and the second cylinder, and the gap is used to dissipate heat from the heat dissipation channel. The second cylinder includes a second outer cylinder and a second inner cylinder disposed inside the second outer cylinder, and a second receiving cavity is formed between the second outer cylinder and the second inner cylinder; The reflector includes a mounting cover and a reflective block. The mounting cover is connected to the end of the second cylinder to close the second opening and block the noise transmitted to the second opening. The reflective block corresponds to the second opening and reflects the noise transmitted to the second opening to the second receiving cavity. The side wall of the mounting cover is provided with a notch, and a gap is formed between the reflective block and the second cylinder. The notch is used to discharge heat passing through the gap.

2. The noise reduction device according to claim 1, characterized in that, The first cylinder includes a first outer cylinder and a first inner cylinder disposed inside the first outer cylinder, and a first receiving cavity is formed between the first outer cylinder and the first inner cylinder; The noise reduction component further includes a first sound-absorbing component and a second sound-absorbing component, wherein the first sound-absorbing component is disposed in the first receiving cavity and the second sound-absorbing component is disposed in the second receiving cavity.

3. The noise reduction device according to claim 2, characterized in that, The reflector block has a protrusion that extends from the center of the reflector block toward one end near the second opening, and the side of the protrusion is recessed, thereby forming a curved surface that diffuses from the center of the reflector block toward the outer periphery of the reflector block. The curved surface is used to reflect the noise transmitted to the second opening to the second receiving cavity.

4. The noise reduction device according to claim 2, characterized in that, The mounting cover includes a connecting part, an extension part, and a top cover connected in sequence. The connecting part is connected to one end of the second outer cylinder. The extension part extends horizontally toward the end away from the second outer cylinder. Both the extension part and the connecting part are cylindrical. The notch is formed on the extension part. The top cover is connected to the end of the extension part away from the second outer cylinder and seals the end of the extension part away from the second outer cylinder.

5. The noise reduction device according to any one of claims 2 to 4, characterized in that, The area of ​​the second inner cylinder corresponding to the first inner cylinder is provided with a reflective surface, and the reflective surface is a smooth curved surface; The reflective surface is used to reflect noise that will enter the heat dissipation channel from the first opening back to the first receiving cavity.

6. The noise reduction device according to claim 5, characterized in that, There are two second openings, with the other second opening located at the other end of the second cylinder, so that the two second openings are positioned opposite each other at both ends of the second cylinder, and the first cylinder is connected to the area between the two second openings of the second cylinder.

7. The noise reduction device according to claim 6, characterized in that, The first cylinder is connected to the central region of the second cylinder, and the included angle is 90°.

8. The noise reduction device according to claim 1, characterized in that, The noise reduction device also includes a heat dissipation component, which is connected to the end of the first cylinder near the first opening. The heat dissipation component is used to allow the heat from the box-type transformer to enter the heat dissipation channel.

9. A noise reduction method for a box-type transformer, comprising installing the noise reduction device as described in any one of claims 1 to 8 onto the box-type transformer, characterized in that, The box-type transformer includes a box body, a noise reduction layer and a protective mesh. The noise reduction layer is connected to the inner wall of the box body. A heat dissipation vent is provided on one side of the box body, and the noise reduction device is installed at the heat dissipation vent. The protective net is connected to the box to form a space that can accommodate the noise reduction layer; The noise reduction layer includes a polymer sound insulation layer and a sound absorption layer stacked together. The polymer sound insulation layer is attached to the inner wall of the enclosure, and the sound absorption layer is attached to the polymer sound insulation layer.

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