CN113611508B - Dry-type transformer that noise reduction effect is good - Google Patents
Dry-type transformer that noise reduction effect is good Download PDFInfo
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- CN113611508B CN113611508B CN202110898079.4A CN202110898079A CN113611508B CN 113611508 B CN113611508 B CN 113611508B CN 202110898079 A CN202110898079 A CN 202110898079A CN 113611508 B CN113611508 B CN 113611508B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/025—Constructional details relating to cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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- Transformer Cooling (AREA)
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Abstract
The invention relates to the technical field of dry-type transformers, and provides a dry-type transformer with a good noise reduction effect, which comprises a shell and a transformer main body arranged in the shell, wherein the shell comprises an inner shell and an outer shell, soundproof cotton is filled in a cavity formed by the inner shell and the outer shell, a plurality of clapboards are arranged between the inner shell and the outer shell and embedded in the soundproof cotton, the clapboards are arranged around the shell, a gap is reserved between every two adjacent clapboards, a plurality of inner heat dissipation holes are arranged on the inner shell, a plurality of outer heat dissipation holes are arranged on the outer shell, and the inner heat dissipation holes and the outer heat dissipation holes are opposite to the clapboards. Through above-mentioned technical scheme, it is poor to have solved the dry-type transformer noise reduction effect among the prior art, promotes the problem that noise reduction effect can influence the cooling effect.
Description
Technical Field
The invention relates to the technical field of dry-type transformers, in particular to a dry-type transformer with a good noise reduction effect.
Background
The dry type transformer refers to a transformer in which an iron core and a winding are not immersed in insulating oil, and is widely used in places such as local lighting, high-rise buildings, airports, wharf CNC mechanical equipment and the like. Cooling methods of the dry type transformer are classified into natural air cooling and forced air cooling. During natural air cooling, the transformer can continuously operate for a long time under rated capacity. When forced air cooling is carried out, the output capacity of the transformer can be improved by 50 percent. The device is suitable for intermittent overload operation or emergency accident overload operation. The existing dry-type transformer generally has the problem of noise during load operation, and the heat dissipation performance of the dry-type transformer is affected after a silencing structure is installed, for example, the dry-type transformer wrapped with soundproof parts such as soundproof cotton has poor heat dissipation effect in daily use.
Disclosure of Invention
The invention provides a dry-type transformer with a good noise reduction effect, and solves the problems that the dry-type transformer in the prior art is poor in noise reduction effect, and the cooling effect is influenced by improving the noise reduction effect.
The technical scheme of the invention is as follows:
the utility model provides a dry-type transformer that noise reduction is effectual, includes the casing, locates the transformer main part in the casing, the casing includes inner shell and shell, the inner shell with the cavity intussuseption that the shell formed is filled with soundproof cotton, the inner shell with still be equipped with the baffle between the shell, the baffle embedded in the soundproof cotton, the baffle is a plurality of, encircles the casing sets up, and is adjacent leave the clearance between the baffle, be equipped with a plurality of interior louvres on the inner shell, be equipped with a plurality of outer radiating holes on the shell, interior louvre with outer radiating hole all with the baffle is relative.
Further, still include the forced cooling device, the forced cooling device includes forced cooling seat, aerofoil, first blast gate and second blast gate, the cavity has in the forced cooling seat, the aerofoil reciprocating sliding sets up in the cavity, the aerofoil will the cavity divide into two wind chambeies, two the wind chamber is separately through a first blast gate and external intercommunication to separately through a second blast gate with the inside intercommunication of casing.
Further, the forced cooling device still is equipped with actuating mechanism, actuating mechanism includes: the device comprises a power source, a guide pipe, a first magnet and a synchronous magnet, wherein the guide pipe is arranged in the cavity, liquid is filled in the guide pipe, the liquid flows in a reciprocating mode under the driving of the power source, and the first magnet is arranged in the guide pipe and slides in a reciprocating mode in the guide pipe under the driving of the liquid; the air plate is sleeved on the guide pipe, the synchronous magnets are arranged on the air plate, and the air plate moves synchronously with the first magnets through magnetic force between the synchronous magnets and the first magnets.
Furthermore, the power supply includes two circulating pumps, and the play liquid end of two circulating pumps is connected, and the feed liquor end passes through the guiding tube is connected.
Furthermore, the driving mechanism further comprises two reversing magnets, wherein the two reversing magnets are respectively positioned at two ends of the guide pipe and provide force for keeping the first magnet away.
Further, a communicating cavity is further formed in the forced cooling seat, the two air cavities are communicated with the communicating cavity through a second air valve respectively and communicated with the inside of the shell through the communicating cavity, and the communicating cavity is communicated with the middle of the bottom surface of the shell.
Further, the first air valve comprises a first mounting frame, a first air opening is formed in the first mounting frame, a first door is further rotatably arranged on the first mounting frame, and the first air opening can be opened or closed through the rotation of the first door; be equipped with first mounting hole on the forced cooling seat, first mounting bracket install in first mounting hole, just first door is located in the cavity, first door rotates to the inboard and can open first wind gap.
Further, the second air valve comprises a second mounting frame, a second air port is formed in the second mounting frame, a second door is further rotatably arranged on the second mounting frame, and the second air port can be opened or closed through the rotation of the second door; the forced cooling seat is provided with a second mounting hole, the second mounting frame is mounted in the second mounting hole, the second door is located outside the cavity, and the second door rotates outwards to open the second air port.
Further, the inner wall of the inner shell is provided with a noise reduction coating.
Further, the outer wall of the shell is provided with a protrusion, and the outer heat dissipation hole is formed in the protrusion.
The working principle and the beneficial effects of the invention are as follows:
the utility model discloses a dry-type transformer, including inner shell, baffle, dry-type transformer, it includes inner shell, outer shell, baffle, it includes baffle, inner louvre, outer louvre, baffle, it is internal with baffle, utilize soundproof cotton and the baffle to the absorption of the noise of different frequency, form dual structure of making an uproar of falling, promote dry-type transformer's noise reduction, simultaneously in order to guarantee dry-type transformer's radiating effect, the baffle design is a plurality ofly, a plurality of baffles set up along the circumference that inner shell and shell enclose, and make every adjacent baffle all leave the clearance, set up interior louvre simultaneously on the inner shell, set up outer radiating hole on the shell, and interior louvre all is relative with the baffle with outer radiating hole. Use soundproof cotton as one and heavily fall and make an uproar, because soundproof cotton's loose structure, flow influence to the air is less, can guarantee that the inside and outside air of casing flows, louvre and outer heat dissipation hole in setting up, and make and be equipped with the clearance between adjacent baffle, guarantee the smooth and easy of the inside and outside air flow of casing, dispel the heat through cold and hot air convection, make the heat in the casing derive fast, prevent the inside heat accumulation of casing, louvre and outer heat dissipation hole set up with the baffle relatively in the while, can guarantee the absorption of acoustic celotex board to formula transformer internal noise, guarantee the heat dissipation when guaranteeing syllable-dividing effect. Through the structure, the noise reduction effect of the dry-type transformer can be effectively improved, and the dry-type transformer can still be enabled to have good heat dissipation when the noise reduction effect is improved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of a dry-type transformer;
FIG. 2 is a first schematic sectional view of a dry-type transformer;
FIG. 3 is a schematic cross-sectional view of a dry-type transformer;
FIG. 4 is a schematic view of an arrangement of a first vent hole and a second vent hole;
FIG. 5 is an enlarged view of a portion A of FIG. 2;
FIG. 6 is a schematic view of the arrangement of the first and second dampers;
FIG. 7 is a schematic view of a first air valve structure;
in the figure: 1. the transformer comprises a shell, 11, an inner shell, 111, an inner heat dissipation hole, 12, an outer shell, 121, an outer heat dissipation hole, 13, soundproof cotton, 14, a partition plate, 15, an exhaust hole, 2, a transformer body, 3, a forced cooling device, 31, a forced cooling seat, 311, an air cavity, 312, a communication cavity, 32, an air plate, 33, a first air valve, 331, a first mounting frame, 332, a first air opening, 333, a first air door, 34, a second air valve, 341, a second mounting frame, 342, a second air opening, 343, a second air door, 36, a guide pipe, 37, a first magnet, 38, a synchronous magnet, 39 and a reversing magnet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
This embodiment proposes
The utility model provides a dry-type transformer that noise reduction effect is good, includes casing 1, locates the transformer main part 2 in the casing 1, casing 1 includes inner shell 11 and shell 12, inner shell 11 with the cavity intussuseption that shell 12 formed is filled with soundproof cotton 13, a serial communication port, inner shell 11 with still be equipped with baffle 14 between shell 12, baffle 14 embedded in soundproof cotton 13, baffle 14 is a plurality of, encircles casing 1 sets up, and is adjacent leave the clearance between baffle 14, be equipped with a plurality of interior louvre 111 on the inner shell 11, be equipped with a plurality of outer louvre 121 on the shell 12, interior louvre 111 with outer louvre 121 all with baffle 14 is relative.
The soundproof cotton 13 and the partition plate 14 embedded in the soundproof cotton 13 are arranged, a double noise reduction structure is formed by utilizing the soundproof cotton 13 and the partition plate 14 to absorb noise with different frequencies, the noise reduction effect of the dry type transformer is improved, meanwhile, in order to ensure the heat dissipation effect of the dry type transformer, the partition plates 14 are designed into a plurality of partitions, the partitions 14 are arranged along the circumferential direction enclosed by the inner shell 11 and the outer shell 12, a gap is reserved between every two adjacent partition plates 14, the inner radiating hole 111 is arranged on the inner shell 11, the outer radiating hole 121 is arranged on the outer shell 12, and the inner radiating hole 111 and the outer radiating hole 121 are opposite to the partition plates 14. Use soundproof cotton 13 as one and heavily fall and make an uproar, because soundproof cotton 13's loose structure, the influence of flowing to the air is less, can guarantee that the inside and outside air of casing 1 flows, louvre 111 and outer radiating hole 121 in setting up, and make and be equipped with the clearance between adjacent baffle 14, guarantee the smooth and easy that the inside and outside air of casing 1 flows, dispel the heat through cold and hot air convection, make the heat in the casing 1 derive fast, prevent the inside accumulated heat of casing 1, louvre 111 sets up with outer radiating hole 121 and baffle 14 relatively in the while, can guarantee the absorption of acoustic celotex board to formula transformer internal noise, guarantee the heat dissipation when guaranteeing syllable-dividing effect. Through the structure, the noise reduction effect of the dry type transformer can be effectively improved, and meanwhile, the dry type transformer can still be enabled to have good heat dissipation when the noise reduction effect is improved.
Still including the forced cooling device 3, the forced cooling device 3 includes forced cooling seat 31, aerofoil 32, first blast gate 33 and second blast gate 34, has the cavity in the forced cooling seat 31, and aerofoil 32 reciprocating sliding sets up in the cavity, and aerofoil 32 divides the cavity into two wind chambeies 311, and two wind chambeies 311 communicate with the external world through a first blast gate 33 separately to communicate through a second blast gate 34 and casing 1 inside separately.
In order to improve the cooling capacity of the dry-type transformer in an overload state, the forced cooling device 3 is additionally arranged, an air plate 32 is arranged in a cavity of a forced cooling seat 31, the cavity is divided into two air cavities 311 by the air plate 32, the volume change of the two air cavities 311 is driven by the movement of the plate, a first air valve 33 and a second air valve 34 are further arranged on the forced cooling seat 31, the first air valve 33 is communicated with the outside and the air cavities 311, the second air valve 34 is communicated with the air cavities 311 and the inside of the housing 1, each air cavity 311 is provided with the first air valve 33 and the second air valve 34, when the forced cooling device 3 works, the air plate 32 moves to reduce the volume of one air cavity 311 and increase the volume of the other air cavity 311, the first air valve 33 corresponding to the air cavity 311 with the reduced volume is closed, the second air valve 34 is opened, the air cavity 311 with the increased volume is opened, the air valve 32 presses the air in the air cavity 311 with the reduced volume into the housing 1, the air cavities 311 through the inner heat dissipation holes 111 and the outer heat dissipation holes 121, the air in the housing 1 is exhausted, the housing 1, the air cavity 32 is quickly, and the air in the housing 1 is quickly cooled, and the air cavity 2 is quickly cooled, and the air plate 32 continuously and the air can be quickly cooled, and the main body can be quickly cooled, and the air in the housing 1, and the transformer can be quickly cooled.
Forced cooling device 3 still is equipped with actuating mechanism, and actuating mechanism includes: the device comprises a power source, a guide pipe 36, a first magnet 37 and a synchronous magnet 38, wherein the guide pipe 36 is arranged in a chamber, liquid is filled in the guide pipe 36, the liquid flows back and forth under the driving of the power source, and the first magnet 37 is arranged in the guide pipe 36 and slides back and forth in the guide pipe 36 under the driving of the liquid; the air plate 32 is sleeved on the guide pipe 36, the synchronous magnet 38 is arranged on the air plate 32, and the air plate 32 synchronously moves along with the first magnet 37 through the magnetic force between the synchronous magnet 38 and the first magnet 37.
The liquid circulates in the guide pipe 36, the circulation direction and the circulation power of the liquid are controlled by a power source, the first magnet 37 provides power through liquid flow to reciprocate in the guide pipe 36, the movement of the air plate 32 is realized through the magnetic force between the first magnet 37 and the synchronous magnet 38, the first magnet 37 is driven by the liquid flow to move, the driving is stable, and the friction noise between the first magnet 37 and the inner wall of the guide pipe 36 can be reduced, the guide pipe 36 is made of a non-magnetic material with high smoothness, the friction between the first magnet 37 and the inner wall of the guide pipe 36 and between the air plate 32 and the outer wall of the guide pipe 36 is reduced as much as possible, and the noise is reduced.
The power source comprises two circulating pumps, the liquid outlet ends of the two circulating pumps are connected, and the liquid inlet ends are connected through a guide pipe 36.
The drive mechanism further comprises two reversing magnets 39, the two reversing magnets 39 being located at either end of the guide tube 36 and providing a force to move the first magnet 37 away.
Two circulating pumps are connected in series and the working direction is opposite, when 3 during operations of forced cooling device, two circulating pumps do alternate work, if a circulating pump opens 2s, another circulating pump opens 2s again after interval 2s, with this circulation, wherein first circulating pump is opened, drive liquid flows along a direction, then this circulating pump is closed, liquid can continue to keep former flow direction under inertial effect after the circulating pump is closed, later second circulating pump starts to make liquid reverse flow, make full use of the power and the inertia of pump, make the rivers switching-over steady.
The reversing magnets 39 are arranged at the two ends of the guide pipe 36, when the wind plate 32 is moved to be close to the end part of the guide pipe 36, the repulsive force between the first magnet 37 and the reversing magnet 39 is increased, the flowing direction of water flow is switched by matching with a circulating pump at the moment, the stable reversing of the wind plate 32 can be realized, and the kinetic energy loss of the wind plate 32 is small during reversing.
The forced cooling seat 31 is also internally provided with a communicating cavity 312, the two air cavities 311 are respectively communicated with the communicating cavity 312 through a second air valve 34 and communicated with the inside of the shell 1 through the communicating cavity 312, and the communicating cavity 312 is communicated with the middle part of the bottom surface of the shell 1.
Still be provided with intercommunication chamber 312 in the cold seat 31 by force, two wind chambeies 311 communicate intercommunication chamber 312 through second blast gate 34 valve respectively, then let in inside casing 1 by intercommunication chamber 312 again, let in from casing 1's bottom surface middle part, make no matter be that aerofoil 32 moves towards which direction homoenergetic and lets in from casing 1's bottom surface middle part, strengthen the heat dissipation to 2 middle parts of transformer main body, the fan of conventional dry-type transformer can also remain except that cold device 3 by force, when cold device 3 by force and fan synchronous operation, the radiating effect is better.
Casing 1 and forced cooling seat 31 are the rectangle structure, casing 1 sets up on forced cooling seat 31, forced cooling seat 31 is as casing 1's support, interior louvre 111 and outer louvre 121 only set up at two opposite faces of casing 1, and the first blast gate 33 that communicates two wind chambeies 311 then sets up at two other faces of forced cooling seat 31, if interior louvre 111 and outer louvre 121 set up two sides around casing 1, first blast gate 33 sets up two sides about forced cooling seat 31, can also set up exhaust hole 15 on casing 1's up end, exhaust hole 15 is located adjacent two baffle 14 clearances, run through inner shell 11, outer shell 12 and soundproof cotton 13, because exhaust hole 15 does not have the shelter from, more upwards discharges from the air discharge fan of the interior hot-air of casing 1 during the operation of forced cooling device 3, reduce the discharge volume from both sides. The above structures are all for the purpose of reducing the hot air discharged from the casing 1 and sucked into the air cavity 311 of the forced cooling seat 31 during forced cooling.
The first air valve 33 comprises a first mounting frame 331, a first air opening 332 is formed in the first mounting frame 331, a first door 333 is rotatably arranged on the first mounting frame 331, and the first air opening 332 can be opened or closed by the rotation of the first door 333; the forced cooling base 31 is provided with a first mounting hole, the first mounting frame 331 is mounted in the first mounting hole, the first door 333 is located in the cavity, and the first door 333 rotates inward to open the first air opening 332.
The second air valve 34 comprises a second mounting frame 341, a second air opening 342 is formed in the second mounting frame 341, a second door 343 is rotatably arranged on the second mounting frame 341, and the second air opening 342 can be opened or closed when the second door 343 rotates; the forced cooling seat 31 is provided with a second mounting hole, the second mounting frame 341 is mounted in the second mounting hole, the second door 343 is located outside the cavity, and the second door 343 is rotated outward to open the second air inlet 342.
When the forced cooling device 3 is not in operation, the first door 333 is in a position closing the first air inlet 332, the second door 343 is in a position closing the second air inlet 342, during the forced cooling operation, due to the movement of the air cooling plate, the volume of one air cavity 311 is increased, the volume of the other air cavity 311 is reduced, the air pressure of the air cavity 311 with the reduced volume is increased, the first door 333 is pressed on the first mounting frame 331 to keep the first air inlet 332 closed, the second door 343 rotates outwards under the total pressure, the second air inlet 342 is opened, so that the air in the air cavity 311 can be discharged into the housing 1 through the second air inlet 342, negative pressure is formed in the air cavity 311 with the increased volume, the second door 343 is pressed on the second mounting frame 341 to close the second air inlet 342, the first door 333 rotates inwards to open the first air inlet 332, and air is sucked from the outside, the whole structure is simple, the movement of the air plate 32 is used for control, and the control is reasonable.
The inner wall of the inner shell 11 is provided with the noise reduction coating, so that the noise reduction effect of the dry-type transformer can be further improved.
The outer wall of the housing 12 is provided with a protrusion, and the outer heat dissipation hole 121 is formed in the protrusion.
Be equipped with the arch on the outer wall of shell 12, on outer heat dissipation hole 121 located the arch, wind blows shell 12 and increases, the pressure reduces at the wind speed of bellying department when protruding, makes wind get into outer heat dissipation hole 121, improves the inside and outside air exchange efficiency of casing 1, promotes the cooling effect under natural forced air cooling state.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A dry-type transformer with good noise reduction effect comprises a shell (1) and a transformer main body (2) arranged in the shell (1), wherein the shell (1) comprises an inner shell (11) and an outer shell (12), a cavity formed by the inner shell (11) and the outer shell (12) is filled with soundproof cotton (13), the dry-type transformer is characterized in that a partition plate (14) is further arranged between the inner shell (11) and the outer shell (12), the partition plate (14) is embedded in the soundproof cotton (13), the partition plates (14) are arranged around the shell (1), a gap is reserved between the adjacent partition plates (14), a plurality of inner radiating holes (111) are formed in the inner shell (11), a plurality of outer radiating holes (121) are formed in the outer shell (12), and the inner radiating holes (111) and the outer radiating holes (121) are opposite to the partition plates (14);
the forced cooling device (3) comprises a forced cooling seat (31), an air plate (32), a first air valve (33) and a second air valve (34), a cavity is arranged in the forced cooling seat (31), the air plate (32) is arranged in the cavity in a reciprocating sliding mode, the cavity is divided into two air cavities (311) by the air plate (32), the two air cavities (311) are respectively communicated with the outside through the first air valve (33) and are respectively communicated with the inside of the shell (1) through the second air valve (34);
forced cooling device (3) still are equipped with actuating mechanism, actuating mechanism includes: the device comprises a power source, a guide pipe (36), a first magnet (37) and a synchronous magnet (38), wherein the guide pipe (36) is arranged in the cavity, the guide pipe (36) is filled with liquid, the liquid flows in a reciprocating manner under the driving of the power source, the first magnet (37) is arranged in the guide pipe (36) and slides in the guide pipe (36) in a reciprocating manner under the driving of the liquid; the air plate (32) is sleeved on the guide pipe (36), the synchronous magnet (38) is arranged on the air plate (32), and the air plate (32) synchronously moves along with the first magnet (37) through the magnetic force between the synchronous magnet (38) and the first magnet (37);
a communication cavity (312) is further arranged in the forced cooling seat (31), the two air cavities (311) are respectively communicated with the communication cavity (312) through a second air valve (34) and communicated with the interior of the shell (1) through the communication cavity (312), and the communication cavity (312) is communicated with the middle of the bottom surface of the shell (1);
the first air valve (33) comprises a first mounting frame (331), a first air opening (332) is formed in the first mounting frame (331), a first door (333) is further rotatably arranged on the first mounting frame (331), and the first air opening (332) can be opened or closed by the first door (333) through rotation; a first mounting hole is formed in the forced cooling seat (31), the first mounting frame (331) is mounted in the first mounting hole, the first door (333) is located in the cavity, and the first door (333) rotates inwards to open the first air opening (332);
the second air valve (34) comprises a second mounting frame (341), a second air opening (342) is formed in the second mounting frame (341), a second door (343) is rotatably arranged on the second mounting frame (341), and the second air opening (342) can be opened or closed by the second door (343); the forced cooling seat (31) is provided with a second mounting hole, the second mounting frame (341) is mounted in the second mounting hole, the second door (343) is located outside the cavity, and the second door (343) rotates outwards to open the second air opening (342).
2. The dry-type transformer with good noise reduction effect according to claim 1, wherein the power source comprises two circulating pumps, the liquid outlet ends of the two circulating pumps are connected, and the liquid inlet ends are connected through the guide pipe (36).
3. Dry transformer according to claim 1, whereas the driving mechanism further comprises two commutating magnets (39), where the two commutating magnets (39) are located at the two ends of the guiding tube (36) respectively and provide a force to move the first magnet (37) away.
4. Dry transformer with improved noise reduction according to claim 1,
dry transformer according to claim 1, whereas the inner wall of the inner shell (11) is provided with a noise reducing coating.
5. Dry transformer according to claim 1, whereas the outer wall of the outer shell (12) is provided with protrusions and the outer heat dissipation holes (121) are provided in the protrusions.
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| CN202110898079.4A CN113611508B (en) | 2021-08-05 | 2021-08-05 | Dry-type transformer that noise reduction effect is good |
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| CN211208152U (en) * | 2019-12-26 | 2020-08-07 | 浙江安德利变压器有限公司 | Noise-reduction high-temperature-prevention dry-type transformer |
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| JPH10253106A (en) * | 1997-03-10 | 1998-09-25 | Sekisui Chem Co Ltd | Indoor ventilating device and method for ventilation |
| CN105546790B (en) * | 2016-01-08 | 2017-12-19 | 珠海格力电器股份有限公司 | Air outlet structure and air interchanger |
| CN206422658U (en) * | 2017-01-18 | 2017-08-18 | 中化重庆涪陵化工有限公司 | A kind of cooling device and the high-voltage motor with the device |
| CN107123930B (en) * | 2017-06-12 | 2019-05-07 | 安徽伟合电子科技有限公司 | A kind of automatic control warm type transformation cabinet |
| EP3813208A1 (en) * | 2019-10-22 | 2021-04-28 | ABB S.p.A. | Low and medium voltage electrical enclosure with shape memory alloy-based cooling system |
| CN112017844A (en) * | 2020-07-14 | 2020-12-01 | 广东电网有限责任公司 | Dry-type transformer vibration/noise reduction device |
| CN213029066U (en) * | 2020-10-10 | 2021-04-20 | 上海碧威网络科技股份有限公司 | Network server shell capable of reducing noise |
| CN213367229U (en) * | 2020-10-30 | 2021-06-04 | 浙江正泰新能源开发有限公司 | Intelligent heat dissipation device of American case transformer substation |
| CN112490917B (en) * | 2021-01-08 | 2021-12-24 | 湖南湘都电气有限公司 | Rainy day self sealing and switch water-cooling circulation radiating switch board device |
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| CN211208152U (en) * | 2019-12-26 | 2020-08-07 | 浙江安德利变压器有限公司 | Noise-reduction high-temperature-prevention dry-type transformer |
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