CN117558531A - Noise reduction device and noise reduction method for box-type transformer - Google Patents

Abstract

The invention discloses a noise reduction device and a noise reduction method for a box-type transformer, wherein the noise reduction device comprises a first cylinder, a second cylinder and a noise reduction assembly; the first cylinder body is communicated with the second cylinder body to form a heat dissipation channel, the heat dissipation channel is provided with a first opening and a second opening, the first opening is positioned at one end of the first cylinder body, the second opening is positioned at one end of the second cylinder body, and an included angle is formed between the first cylinder body and the second cylinder body; 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 reflection piece, the reflection piece is connected to one end of the second cylinder body, the reflection piece is used for reflecting noise back to the heat dissipation channel, a gap is formed between the reflection piece and the second cylinder body, 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 radiate the box-type transformer, can reflect the noise transmitted from the inside of the box-type transformer, and can increase the propagation time of the noise in the radiating channel, thereby achieving the effect of noise reduction.

Description

Noise reduction device and noise reduction method for box-type transformer

Technical Field

The invention relates to the field of box transformers, in particular to a noise reduction device and a noise reduction method for a box transformer.

Background

The box-type transformer is a core component part in the urban and rural low-voltage distribution network, and the social attention of the urban box-type transformer noise problem rises year by year along with the improvement of the requirement of the living environment. The noise of the transformer belongs to the low-frequency noise, the penetrating power is extremely strong, the decreasing speed is very slow, the sound wave is longer, the sound wave can easily pass through the barrier, and the sound wave can travel long distance and penetrate through the wall to penetrate through the wall and directly enter the human ear, so that the influence on the human body health is great.

The noise reduction material is arranged on the box-type transformer to achieve the noise reduction effect, but the noise reduction material is arranged on the box-type transformer, so that when the load of the box-type transformer is higher and the heat dissipation requirement is higher, the noise reduction material can influence the heat dissipation effect of the box-type transformer; if the through holes are directly formed in the box-type transformer for heat dissipation, noise can be transmitted from the through holes, and the noise reduction effect is affected.

Disclosure of Invention

Accordingly, it is necessary to provide a noise reduction device capable of radiating heat from a box-type transformer and reducing noise of the box-type transformer.

In addition, it is necessary to provide a noise reduction method for reducing noise of the box-type transformer by adopting the noise reduction device.

In order to solve the above problems, the present invention provides a noise reduction device, wherein a box-type transformer has a heat dissipation port for dissipating heat, and the noise reduction device comprises a first cylinder, a second cylinder and a noise reduction component;

the first cylinder body is communicated with the second cylinder body to form a heat dissipation channel, the heat dissipation channel is provided with a first opening and a second opening, the first opening is positioned at one end of the first cylinder body, the second opening is positioned at one end of the second cylinder body, and an included angle is formed between the first cylinder body and the second cylinder body;

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 piece, the reflecting piece is connected with one end of the second cylinder body, the reflecting piece is used for reflecting noise back to the heat dissipation channel, a gap is formed between the reflecting piece and the second cylinder body, and the gap is used for discharging heat of the heat dissipation channel.

In addition, it is necessary to provide a box-type transformer mounted with the above noise reduction device.

In one embodiment, the first cylinder comprises a first outer cylinder and a first inner cylinder arranged in the first outer cylinder, a first accommodating space is formed between the first outer cylinder and the first inner cylinder, the second cylinder comprises a second outer cylinder and a second inner cylinder arranged in the second outer cylinder, and a second accommodating space is formed between the second outer cylinder and the second inner cylinder;

the noise reduction assembly further comprises a first sound absorption piece and a second sound absorption piece, wherein the first sound absorption piece is arranged in the first accommodating cavity, and the second sound absorption piece is arranged in the second accommodating cavity.

In one embodiment, the reflecting member includes a mounting cover coupled to an end of the second cylinder to close the second opening to block the noise transferred to the second opening, and a reflecting block corresponding to the second opening to reflect the noise transferred to the second opening to the second receiving chamber;

the side wall of the mounting cover is provided with a gap, a gap is formed between the reflecting block and the second cylinder body, and the gap is used for discharging heat passing through the gap.

In one embodiment, the reflection block is provided with a protrusion extending from the center of the reflection block toward one end near the second opening, and the side surface of the protrusion is recessed to form a curved surface spreading from the center of the reflection block toward the outer periphery of the reflection block, the curved surface being for reflecting the noise transferred to the second opening to the second accommodation chamber.

In one embodiment, the installation cover comprises a connecting part, an extending part and a top cover which are sequentially connected, the connecting part is connected with one end of the second outer cylinder, the extending part horizontally extends towards one end far away from the second outer cylinder, the extending part and the connecting part are both cylindrical, the notch is formed in the extending part, the top cover is connected with one end, far away from the second outer cylinder, of the extending part, and one end, far away from the second outer cylinder, of the extending part is blocked.

In one embodiment, a reflecting surface is arranged in a region of the second inner cylinder corresponding to the first inner cylinder, and the reflecting surface is a smooth curved surface;

the reflecting surface is used for reflecting noise entering the heat dissipation channel from the first opening to the first accommodating cavity.

In one embodiment, the number of the second openings is two, the other second opening is positioned at the other end of the second cylinder body, so that the two second openings are oppositely arranged at two ends of the second cylinder body, and the first cylinder body is connected to the area between the two second openings of the second cylinder body.

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

In one embodiment, the noise reduction device further comprises a heat dissipation assembly, wherein the heat dissipation assembly is connected to one end of the first cylinder body, which is close to the first opening, and the heat dissipation assembly is used for enabling heat of the box-type transformer to enter the heat dissipation channel.

In one embodiment, a noise reduction method for a box-type transformer is provided, the noise reduction device is mounted on the box-type transformer, the box-type transformer comprises a box body, a noise reduction layer and a protection net, the noise reduction layer is connected to the inner wall of the box body, a heat dissipation port is arranged on one side of the box body, and the noise reduction device is mounted at the heat dissipation port;

the protection net is connected with the box body to form an accommodating space capable of accommodating the noise reduction layer;

the noise reduction layer comprises a high polymer sound insulation layer and a sound absorption layer which are arranged in a laminated mode, the high polymer sound insulation layer is adhered to the inner wall of the box body, and the sound absorption layer is adhered to the high polymer sound insulation layer.

According to the embodiment of the invention, the box-type transformer, the first cylinder with the first opening and the second cylinder with the second opening are sequentially communicated, so that the box-type transformer can be communicated with the outside, and the heat of the box-type transformer can be discharged through a gap formed between the second opening and the reflecting piece, so that the purpose of radiating the heat of the box-type transformer to the outside is achieved;

the first cylinder body is connected with the second cylinder body at a certain angle, so that noise can be reflected in the area corresponding to the first cylinder body on the inner wall of the second cylinder body after entering the heat dissipation channel through the first inlet, the noise is reflected in the transmission process of the noise, the propagation time of the noise is increased, the noise leakage is reduced, and the noise reduction effect is achieved;

the reflection piece is arranged, so that the noise can be prevented from directly transmitting from the second opening, the noise transmitted along the heat dissipation channel is reflected towards the heat dissipation channel, the noise is returned to the heat dissipation channel again, the propagation time of the noise in the heat dissipation channel is prolonged, and the noise is weakened through continuous reflection of the noise, so that the noise reduction effect is achieved;

therefore, when the noise reduction device is applied to the box-type transformer, heat dissipation can be carried out on the box-type transformer, noise transmitted out of the inside of the box-type transformer can be reflected, the propagation time of the noise in a heat dissipation channel is increased, and therefore the noise reduction effect is achieved.

Drawings

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

Wherein:

fig. 1 is a schematic structural diagram of a noise reduction device according to an embodiment.

Fig. 2 is an exploded view of the noise reducing device shown in fig. 1.

Fig. 3 is a schematic view of the internal structure of the noise reduction device shown in fig. 1.

Reference numerals:

10-a first cylinder, 11-a first outer cylinder, 12-a first inner cylinder, 14-a first accommodating space and 16-a first opening;

20-second cylinder, 21-second outer cylinder, 22-second inner cylinder, 222-baffle, 24-second containing space, 26-second opening, 28-convex ring;

30-noise reduction components, 32-first sound absorption pieces, 34-second sound absorption pieces, 36-reflecting pieces, 362-mounting covers, 3622-connecting parts, 3624-extending parts, 36242-notches, 3626-top covers, 364-reflecting blocks and 3644-protrusions; 40-heat sink assembly.

Detailed Description

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

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the members in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are correspondingly changed.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Referring to fig. 1 to 3, the present invention discloses a noise reduction device and a noise reduction method for a box-type transformer according to an embodiment, wherein the noise reduction device comprises a first cylinder 10, a second cylinder 20 and a noise reduction assembly 30; the first cylinder 10 is communicated with the second cylinder 20 to form a heat dissipation channel, the heat dissipation channel is provided with a first opening 16 and a second opening 26, the first opening 16 is positioned at one end of the first cylinder 10, the second opening 26 is positioned at one end of the second cylinder 20, and an included angle is formed between the first cylinder 10 and the second cylinder 20.

One end of the first cylinder 10 is used for being connected with a heat dissipation port of the box-type transformer, and the first opening 16 corresponds to the heat dissipation port.

The noise reduction assembly 30 includes a reflecting member 36, the reflecting member 36 is connected to one end of the second cylinder 20, the reflecting member 36 is used for reflecting noise back to the heat dissipation channel, and a gap is formed between the reflecting member 36 and the second cylinder 20, and the gap is used for discharging heat of the heat dissipation channel.

Specifically, the first cylinder 10 and the second cylinder 20 are connected with a heat dissipation channel, and the first cylinder 10 and the second cylinder 20 form an included angle, the heat dissipation channel is not a straight channel but a channel with corners, the heat dissipation channel can not influence heat transfer when heat is discharged, and the heat dissipation channel can emit sound waves when the sound waves are transferred, such as noise transfer, so that the size of the sound waves is weakened, the noise can be weakened gradually in the transfer process, and the effect of reducing the noise is achieved.

The first opening 16 is a noise inlet, the second opening 26 is a noise outlet, and by providing the reflecting member 36 at the noise outlet, the noise can be returned into the heat dissipation path so as to reduce the noise transmitted from the second opening 26.

Since a space is formed between the reflecting member 36 and the second cylinder 20, the second opening 26 is partially covered by the reflecting member 36, and this space can be used for heat discharge.

According to the embodiment of the invention, the noise reduction device is capable of communicating the box-type transformer with the outside by sequentially communicating the box-type transformer, the first cylinder 10 with the first opening 16 and the second cylinder 20 with the second opening 26, so that the heat of the box-type transformer is discharged through a gap formed between the second opening 26 and the reflecting piece 36, and the purpose of radiating the heat of the box-type transformer to the outside is achieved; the first barrel 10 is connected with the second barrel 20 at a certain angle, so that noise can be conveniently reflected in the area corresponding to the first barrel 10 on the inner wall of the second barrel 20 after entering a heat dissipation channel through the first inlet, the propagation time of the noise is increased by reflecting the noise in the transmission process of the noise, the noise leakage is reduced, and the noise reduction effect is achieved.

Noise can be prevented from directly coming out of the second opening 26 by the provision of the reflecting member 36, and the noise transmitted along the heat dissipation channel is reflected toward the inside of the heat dissipation channel, and the noise is returned back to the inside of the heat dissipation channel again, so that the propagation time of the noise in the heat dissipation channel is increased, and the noise is weakened by continuous reflection of the noise, so that the noise reduction effect is achieved.

Therefore, when the noise reduction device is applied to the box-type transformer, heat dissipation can be carried out on the box-type transformer, noise transmitted out of the inside of the box-type transformer can be reflected, the propagation time of the noise in a heat dissipation channel is increased, and therefore the noise reduction effect is achieved.

Preferably, the first cylinder 10 includes a first outer cylinder 11 and a first inner cylinder 12 disposed within the first outer cylinder 11, with a first accommodation space 14 formed between the first outer cylinder 11 and the first inner cylinder 12, and the second cylinder 20 includes a second outer cylinder 21 and a second inner cylinder 22 disposed within the second outer cylinder 21, with a second accommodation space 24 formed between the second outer cylinder 21 and the second inner cylinder 22; the noise reduction assembly 30 further includes a first sound absorbing member 32 and a second sound absorbing member 34, the first sound absorbing member 32 being disposed within the first receiving chamber and the second sound absorbing member 34 being disposed within the second receiving chamber.

Specifically, the first sound absorbing member 32 is accommodated in the first accommodating space 14, the second sound absorbing member 34 is accommodated in the second accommodating space 24, and the first cylinder 10 and the second cylinder 20 form an included angle, so that after entering the heat dissipation channel through the first inlet, noise is reflected by the inner wall of the second inner cylinder 22 and the region of the second inner cylinder 22 corresponding to the first cylinder 10, the noise is reflected by the inner wall of the second inner cylinder 22 to the first accommodating cavity, and the noise reflected by the inner wall of the second inner cylinder 22 is absorbed by the first sound absorbing member 32; in addition, reflect the noise at the transmission in-process of noise, increased the travel time of noise to cooperate first sound absorbing member 32 and second sound absorbing member 34 to carry out the absorption of bigger degree to the noise, thereby noise leakage is reduced, reaches the effect of making an uproar falls.

And, through setting up reflector 36, can prevent that the noise from directly coming out from second opening 26, when the noise gets into the heat dissipation passageway along first opening 16 and transmits to the one end department of second inner tube 22, reflector 36 reflects in the noise that follows the heat dissipation passageway and transmit towards the heat dissipation passageway, it holds the chamber to reflect to the second, so that the noise is held the intracavity by the second and inhale the sound piece 34 absorption, and, reflect the noise and also can increase the propagation time of noise and reduce the noise in the heat dissipation passageway, increase the time of noise propagation can be convenient for first inhale the sound piece 32 and inhale the sound piece 34 absorption of noise more degree.

Therefore, the reflection of the sound wave generated by the noise can directly reduce the noise, and the time for transmitting the noise in the heat dissipation channel can be increased to match with the greater degree of noise absorption of the first sound absorbing member 32 and the second sound absorbing member 34, so that the noise transmitted from the heat dissipation channel can be reduced, and the noise reduction effect is achieved.

Preferably, the first sound absorbing member 32 and the second sound absorbing member 34 are both calm sound insulating and absorbing cotton.

Preferably, the noise reduction device further comprises a heat dissipation assembly 40, wherein the heat dissipation assembly 40 is connected to one end of the first cylinder 10 near the first opening 16, and the heat dissipation assembly 40 is used for enabling heat of the box-type transformer to enter the heat dissipation channel.

The heat dissipation assembly 40 is connected to one end of the first cylinder 10 near the first opening 16, the heat dissipation assembly 40 is a heat dissipation fan, and the heat dissipation fan can rapidly exhaust the heat in the box-type transformer to the heat dissipation channel through the heat dissipation opening and the first opening 16, and the heat dissipation channel is followed by the heat dissipation channel and then is discharged from the notch 36242.

The heat dissipation assembly 40 can accelerate the circulation of heat and can rapidly dissipate heat.

Preferably, the reflecting member 36 includes a mounting cap 362 and a reflecting block 364, the mounting cap 362 being coupled to an end of the second cylinder 20 to close the second opening 26 to block noise transferred to the second opening 26, the reflecting block 364 corresponding to the second opening 26 to reflect noise transferred to the second opening 26 to the second receiving chamber; the sidewall of the mounting cap 362 is provided with a gap 36242, which forms a gap between the reflective block 364 and the second cylinder 20, and the gap 36242 is used for discharging heat passing through the gap.

Specifically, the mounting cover 362 is connected to the end of the second cylinder 20 provided with the second opening 26, and is capable of blocking the second opening 26, thereby blocking noise transmitted from the first opening 16 to the second opening 26 along the heat dissipation path, and reflecting the noise transmitted to the second opening 26 to the second accommodating chamber in cooperation with the reflecting block 364, so that the noise is absorbed by the second sound absorbing member 34 in the second accommodating chamber.

Since the mounting cap 362 blocks the second opening 26, a notch 36242 is provided in the mounting cap 362 so that heat entering the heat dissipation path from the first opening 16 can be discharged from the notch 36242 through the gap.

When noise and heat enter the heat dissipation channel along the first opening 16, the noise and heat will pass through the areas corresponding to the first cylinder 10 and the second cylinder 20 in turn, and compared with the second opening 26 directly corresponding to the second cylinder 20, the notch 36242 arranged on the side surface of the mounting cover 362 will not affect the heat dissipation, but the notch 36242 arranged on the side surface will reduce the noise dissipation to a certain extent; and the mounting cover 362 and the reflective block 364 are also capable of reflecting noise, such a reflective member 36 can reduce the transmission of noise, thereby achieving a noise reduction effect.

Therefore, by providing the reflecting member 36, the propagation of noise can be reduced while heat dissipation is not affected.

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 in a circular plate shape, the extension 3624 is in a cylindrical shape, wherein the radian of the notch 36242 is pi, and when the noise reduction device is installed at the heat dissipation port of the box-type transformer, the notch 36242 is downward, so that rainwater can be prevented from entering from the notch 36242.

Further, the reflective block 364 is provided with a protrusion 3644, the protrusion 3644 extends from the center of the reflective block 364 toward one end near the second opening 26, and the side surface of the protrusion 3644 is recessed, thereby forming a curved surface which spreads from the center of the reflective block 364 toward the outer periphery of the reflective block 364, the curved surface being for reflecting noise transmitted to the second opening 26 to the second accommodating chamber.

Specifically, the protrusion 3644 extends from the central region of the reflective block 364 toward the inside of the heat dissipation channel, and the side surface of the protrusion 3644 is recessed toward the central region of the emission block, so that the surface of the reflective surface facing the second opening 26 is a curved surface, which is formed by diffusing from the end of the protrusion 3644 toward the outer periphery of the reflective block 364.

The curved surface can reflect the noise entering the heat dissipation channel from the first opening 16 and transmitted to the second opening 26 toward the second accommodating cavity, and a large amount of the noise is absorbed by the second sound absorbing member 34 in the second accommodating cavity; a small amount of noise is reflected back to the heat dissipation channel and collides with the first inner cylinder 12 or the second inner cylinder 22, so that resonance occurs with the first inner cylinder 12 or the second inner cylinder 22 to achieve the noise reduction effect, and the noise is reflected back to the heat dissipation channel to indirectly increase the propagation time of the noise in the heat dissipation channel, so that the first sound absorbing member 32 and the second sound absorbing member 34 absorb a large amount of noise.

Further, the protrusion 3644 is a tapered protrusion 3644, and a side surface of the tapered protrusion 3644 is recessed inward.

The conical protrusion 3644 can make the surface of the reflecting block 364 facing the second opening 26 be a sharp curved surface, the sharp curved surface can reflect noise toward the periphery, and diffuse reflection generated by the noise can reduce the energy of the noise wave, so as to achieve the effect of noise reduction.

Preferably, the reflecting block 364 is located at the same plane as the end of the second outer cylinder 21 so that the reflecting block 364 is disposed in the heat dissipation path.

In detail, the protrusion 3644 is as long as possible in the case where the space of the heat dissipation path in the second cylinder 20 is limited.

The protrusions 3644 can be made to extend as far into the heat dissipation path as possible so as to reflect a large amount of noise so that the first sound absorbing member 32 and the second sound absorbing member 34 absorb more noise to a greater extent.

Preferably, the mounting cover 362 includes a connecting portion 3622, an extending portion 3624 and a top cover 3626 that are sequentially connected, the connecting portion 3622 is connected to one end of the second outer cylinder 21, the extending portion 3624 horizontally extends toward one end far away from the second outer cylinder 21, the extending portion 3624 and the connecting portion 3622 are both cylindrical, a notch 36242 is formed in the extending portion 3624, the top cover 3626 is connected to one end of the extending portion 3624 far away from the second outer cylinder 21, and one end of the extending portion 3624 far away from the second outer cylinder 21 is blocked.

Specifically, the connecting portion 3622 is sleeved at the end of the second outer cylinder 21, the extending portion 3624 extends horizontally towards the end far away from the second outer cylinder 21, and the top cover 3626 seals off the end of the extending portion 3624, so that heat in the heat dissipation channel can only be discharged from the notch 36242 formed along the extending portion 3624.

The effect of heat dissipation by the notch 36242 provided on the side surface of the extension portion 3624 is hardly different from that of the second opening 26 facing the heat dissipation path; however, in terms of noise propagation, the top cover 3626 reflects sound waves generated by the noise into the heat dissipation channel, so that a certain noise reduction effect can be achieved, and further, less noise is transmitted from the notch 36242.

Preferably, the inner wall of the second outer cylinder 21 is provided with a convex ring 28, the convex ring 28 is arranged at the end of the second outer cylinder 21, and the outer side wall of the convex ring 28 is connected to the inner side wall of the second outer cylinder 21.

The length of the second inner barrel 22 is less than the length of the second outer barrel 21 such that an end of the second inner barrel 22 adjacent the second opening 26 is spaced from the collar 28.

Specifically, the convex ring 28 is disposed in the second outer cylinder 21, and the convex ring 28 is connected to the end of the second outer cylinder 21, so that the end, close to the heat dissipation channel, of the notch 36242 can be blocked, noise is blocked, the noise is directly transmitted from the notch 36242 through the heat dissipation channel, the sound wave generated by the noise can be blocked, and the noise reduction effect can be achieved.

The length of the second inner tube 22 is smaller than that of the second outer tube 21, so that the convex ring 28 can be prevented from abutting against the second inner tube 22, and noise sound waves, which are reflected by the reflecting member 36 and influence of the convex ring 28, can be prevented from entering the second accommodating cavity and being absorbed by the second sound absorbing member 34.

Preferably, the area of the second inner cylinder 22 corresponding to the first inner cylinder 12 is provided with a reflecting surface, and the reflecting surface is a smooth curved surface; the reflecting surface serves to reflect noise entering the heat dissipation path from the first opening 16 to the first receiving chamber.

Specifically, at the connection between the first outer cylinder 11 and the second outer cylinder 21, one surface of the second inner cylinder 22 opposite to the first inner cylinder 12 is a smooth curved surface, and the smooth curved surface can reflect the sound wave of the noise entering from the first opening 16, so that the noise can be reflected to the first accommodating cavity, and the first sound absorbing member 32 in the first accommodating cavity is convenient for absorbing the noise.

Meanwhile, noise sound waves entering from the first opening 16 are reflected towards the direction of the first opening 16, noise transmitted from the noise reduction device can be reduced, and the noise reduction device can achieve a heat dissipation effect and simultaneously reduce noise transmission.

Preferably, the number of the second openings 26 is two, and the other second opening 26 is located at the other end of the second cylinder 20 where the second opening 26 is located, so that two second openings 26 are oppositely disposed at both ends of the second cylinder 20, and the first cylinder 10 is connected to the region between the two second openings 26 of the second cylinder 20.

Further, the first cylinder 10 is connected to the central region of the second cylinder 20 at an angle of 90 °.

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, so that a noise reduction device having a T-shape overall can be formed, and the heat dissipation channel is also T-shaped.

The overall T-shaped noise reducer is of a cylindrical structure, heat enters the heat dissipation channel through the first opening 16, and is discharged through the notches 36242 in the side walls of the reflecting piece 36 at the two second openings 26.

When the noise reduction device is used for radiating, noise can also enter the radiating channel, but the noise can generate diffuse reflection in the radiating channel, and the time of the noise spreading in the radiating channel can be increased by continuously reflecting sound waves generated by the noise, so that the first sound absorption piece 32 and the second sound absorption piece 34 absorb the noise to a greater degree, and the noise reduction effect is achieved.

Preferably, a baffle is disposed around both ends of the smooth curved surface on the inner wall of the second inner cylinder 22, the blocking pieces 222 are annular, the annular blocking pieces 222 are disposed obliquely toward one end close to the second opening 26, and opposite surfaces of the two annular blocking pieces 222 are curved surfaces, so that noise is reflected toward the corresponding area of the first accommodating cavity.

The noise reduction device is arranged on the box-type transformer, the box-type transformer comprises a box body, a noise reduction layer and a protection net, the noise reduction layer is connected to the inner wall of the box body, a heat dissipation opening is formed in one side of the box body, and the noise reduction device is arranged at the heat dissipation opening.

The protection net is connected with the box body to form an accommodating space capable of accommodating the noise reduction layer.

The noise reduction layer comprises a high polymer sound insulation layer and a sound absorption layer which are stacked, the high polymer sound insulation layer is adhered to the inner wall of the box body, and the sound absorption layer is adhered to the high polymer sound insulation layer.

Specifically, the box-type transformer is arranged in the box-type transformer through the inside polymer sound insulation layer and the sound absorption layer, so that the effect of reducing noise of the box-type transformer is achieved, the polymer sound insulation layer and the sound absorption layer are protected through the protection net, and the noise reduction sound insulation layer in the box-type transformer is not easy to damage and has a long service life.

Install the thermovent department of box transformer with such noise reduction device, can dispel the heat to sealed box transformer to, when dispelling the heat to box transformer, such noise reduction device installs thermovent department of box transformer can prevent that the interior low frequency noise of box transformer from leaking from the thermovent in a large number.

Therefore, the noise reduction device can be mounted to the heat radiation port of the box-type transformer to directly mount the heat radiation module 40 to the heat radiation port, thereby achieving the effect of noise reduction.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. The noise reduction device for the box-type transformer is provided with a heat dissipation port for dissipating heat and is characterized by comprising a first barrel, a second barrel and a noise reduction assembly;

the first cylinder body is communicated with the second cylinder body to form a heat dissipation channel, the heat dissipation channel is provided with a first opening and a second opening, the first opening is positioned at one end of the first cylinder body, the second opening is positioned at one end of the second cylinder body, and an included angle is formed between the first cylinder body and the second cylinder body;

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 piece, the reflecting piece is connected with one end of the second cylinder body, the reflecting piece is used for reflecting noise back to the heat dissipation channel, a gap is formed between the reflecting piece and the second cylinder body, and the gap is used for discharging heat of the heat dissipation channel.

2. The noise reduction device according to claim 1, wherein the first cylinder includes a first outer cylinder and a first inner cylinder provided in the first outer cylinder, and a first accommodation 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 provided in the second outer cylinder, and a second accommodation space is formed between the second outer cylinder and the second inner cylinder;

the noise reduction assembly further comprises a first sound absorption piece and a second sound absorption piece, wherein the first sound absorption piece is arranged in the first accommodating cavity, and the second sound absorption piece is arranged in the second accommodating cavity.

3. The noise reduction device according to claim 2, wherein the reflecting member includes a mounting cover attached to an end of the second cylinder to close the second opening to block the noise transmitted to the second opening, and a reflecting block corresponding to the second opening to reflect the noise transmitted to the second opening to the second receiving chamber;

the side wall of the mounting cover is provided with a gap, a gap is formed between the reflecting block and the second cylinder body, and the gap is used for discharging heat passing through the gap.

4. A noise reducing device according to claim 3, wherein the reflection block is provided with a projection extending from a center of the reflection block toward one end near the second opening, and a side surface of the projection is recessed so as to form a curved surface diffusing from the center of the reflection block toward an outer periphery of the reflection block, the curved surface being for reflecting the noise transmitted to the second opening to the second accommodation chamber.

5. The noise reduction device according to claim 3, wherein the mounting cover comprises a connecting portion, an extending portion and a top cover which are sequentially connected, the connecting portion is connected to one end of the second outer cylinder, the extending portion horizontally extends towards one end far away from the second outer cylinder, the extending portion and the connecting portion are both cylindrical, the notch is formed in the extending portion, and the top cover is connected to one end of the extending portion far away from the second outer cylinder and seals one end of the extending portion far away from the second outer cylinder.

6. The noise reducer according to any one of claims 2 to 5, wherein a reflecting surface is provided in a region of the second inner cylinder corresponding to the first inner cylinder, the reflecting surface being a smooth curved surface;

the reflecting surface is used for reflecting noise entering the heat dissipation channel from the first opening to the first accommodating cavity.

7. The noise reducing device according to claim 6, wherein the number of the second openings is two, the other second opening is located at the other end of the second cylinder, so that two second openings are oppositely disposed at both ends of the second cylinder, and the first cylinder is connected to an area between the two second openings of the second cylinder.

8. The noise reducer of claim 7, wherein the first cylinder is connected to a central region of the second cylinder, and the included angle is 90 °.

9. The noise reduction device of claim 1, further comprising a heat dissipation assembly coupled to an end of the first barrel proximate the first opening, the heat dissipation assembly configured to draw heat from the box transformer into the heat dissipation channel.

10. A noise reduction method for a box-type transformer, wherein the noise reduction device as claimed in any one of claims 1 to 9 is mounted on the box-type transformer, and is characterized in that the box-type transformer comprises a box body, a noise reduction layer and a protection net, the noise reduction layer is connected to the inner wall of the box body, a heat radiation port is arranged on one side of the box body, and the noise reduction device is mounted at the heat radiation port;

the protection net is connected with the box body to form an accommodating space capable of accommodating the noise reduction layer;

the noise reduction layer comprises a high polymer sound insulation layer and a sound absorption layer which are arranged in a laminated mode, the high polymer sound insulation layer is adhered to the inner wall of the box body, and the sound absorption layer is adhered to the high polymer sound insulation layer.