CN101325118B - Dry-type transformer with vapour-liquid two phase heat-radiation loop - Google Patents
Dry-type transformer with vapour-liquid two phase heat-radiation loop Download PDFInfo
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- CN101325118B CN101325118B CN2008100274379A CN200810027437A CN101325118B CN 101325118 B CN101325118 B CN 101325118B CN 2008100274379 A CN2008100274379 A CN 2008100274379A CN 200810027437 A CN200810027437 A CN 200810027437A CN 101325118 B CN101325118 B CN 101325118B
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Abstract
The invention discloses a dry-type transformer with a vapor-liquid two-phase cooling loop, which comprises at least an iron core and at least one coil component arranged around the iron core, wherein the dry-type transformer comprises at least a vapor-liquid two-phase cooling loop, the vapor-liquid two-phase cooling loop comprises an evaporator arranged in the area of the coil component, a condenser arranged at the outer part of the dry-type transformer, a vapor phase pipeline connected between the vapor-phase outlet of the evaporator and the vapor-phase inlet of the condenser, a liquid phase pipeline connected between the liquid-phase outlet of the condenser and the liquid-phase inlet of the evaporator, and vapor-liquid two-phase working medium circularly flowing in the vapor-liquid two-phase cooling loop. The dry-type transformer adopts the manner of direct evaporation and condensation inside the loop, and converts part of the heat into the kinetic energy of the vapor and the potential energy of the liquid by evaporation, so as to drive or partially drive the loop to be circled and further achieve the efficient transformer cooling.
Description
Technical field
The present invention relates to a kind of transformer structure of dry type heat radiation; More specifically incite somebody to action, the present invention relates to a kind of dry-type transformer with vapour-liquid two phase heat-radiation loop.
Background technology
Traditional transformer generally uses the oil immersed type radiating mode, and the free convection by oil brings out the heat that coil produced, and looses in air.But this heat dissipating method efficient is lower.
Afterwards, people have invented vapour-cooled transformer, by to transformer coil surface spraying (as No. the 58101407th, Japan Patent and No. 58216409 disclosed correlation technique), or utilize the liquid film evaporation (as No. the 3887759th, United States Patent (USP) and No. 4011535 disclosed correlation technique) of the coil surface of particular design to dispel the heat.
Be opposite to underground transformer, also invented " heat pipe " (as No. 7037725 disclosed correlation technique of Japan Patent), or the heat dissipating method of " loop heat pipe " (as No. 7220936 disclosed correlation technique of Japan Patent).But in above invention, transformer all is placed in the packaging container, and transformer cools off by insulating gas, liquid or evaporation of liquid; " loop heat pipe " method also comprises the multiple heat interchanger, and heat exchange efficiency is low.
Along with the development of dry-type transformer and heat dissipation technology, above transformer heat dissipating method can not provide radiating efficiency efficiently.Dry-type transformer generally adopts the radiating mode of natural convection air.For example, between caloric value bigger low-voltage coil and high-tension coil, keeping tens of mm clearance together,, low-voltage coil and high-tension coil are being dispelled the heat so that the air of q.s passes through.But this design is effectively to lower powered dry-type transformer, but along with the increase of power, winding volume increases, and caloric value is big simultaneously, and general natural convection air can not be cooled off dry-type transformer effectively.
Therefore, provide a kind of dry-type transformer of high efficiency and heat radiation of can realizing to become urgent problem.
Summary of the invention
The object of the present invention is to provide a kind of dry-type transformer that can realize high efficiency and heat radiation with vapour-liquid two phase heat-radiation loop.
Technical scheme of the present invention is achieved in that provides a kind of dry-type transformer with vapour-liquid two phase heat-radiation loop, comprise at least one iron core and the coil block that at least one is provided with around iron core, wherein, dry-type transformer has at least one vapour-liquid two phase heat-radiation loop, and vapour-liquid two phase heat-radiation loop comprises the evaporator that is arranged on the coil block zone, be arranged on the condenser of dry-type transformer outside, be connected the vapour phase pipeline between the vapour phase inlet of the vapor phase exit of evaporator and condenser, liquid pipe between the liquid phase outlet that is connected condenser enters the mouth with the liquid phase of evaporator, and the vapour-liquid two-phase working substance that in vapour-liquid two phase heat-radiation loop, circulates.
Dry-type transformer quarter-phase circuit radiating mode of the present invention is the heat that is sent by the mode absorbing coil that the evaporator that is in transformer inside evaporates with liquid (as water), steam is taken to the condenser of transformer outside by circuit cycle, again be condensed into liquid, heat be dispersed in the air by condenser go simultaneously.Different with general evaporation formula heat radiation transformer, evaporation-condensation process of the present invention is finished the inside that occurs in the loop, so volume is little, and required cooling working medium is also few.
The present invention adopts a kind of two phase heat-radiation technology of loop-type, can not only realize effectively cooling to large-scale dry-type transformer, and can reduce the gap between low-voltage coil and the high-tension coil, thereby save the coil wire rod.
The present invention also utilizes (or part is utilized) evaporation of liquid that portion of hot is converted into the kinetic energy of steam and the potential energy of liquid, drives (or process auxiliary drive) circuit cycle, realizes transformer heat radiation efficiently.
The type of drive in loop is decided on specification requirements such as the structure of transformer, heat dissipation capacities, and the structure of loop critical piece and residing position thereof are also therefore different.The type of drive in loop comprises that pump drives, and weight-driven and capillary force drive.General employing evaporation-weight-driven and the capillary force type of drive less to the heat dissipation capacity demand are characterized in not having moving mechanical part and extra power; The general employing pump type of drive big to the heat dissipation capacity demand.According to the structure (as spiral evaporator) of evaporator, evaporator can be connected with the loop by the electric insulation connector, liquid is circulated in the loop in, inhibition or the loss of reduction current vortex.Electric insulation connects and can also can be connected simultaneously with the port of export at evaporator at the evaporator or the port of export.
The working medium of quarter-phase circuit can be (but being not limited to) water, ammonia, propylene etc.; The general requirement is nontoxic, non-inflammable, non conducting fluid, and its solidifying point will be lower than the minimum temperature of transformer operational environment; Working medium can pure material, also can be the mixture that two or more different material is formed, and for example, mass ratio is 9: 1 a water ammonia mixture.
Selectively, condenser can be arranged on the top of dry-type transformer.At this moment, further comprise the reservoir between the liquid phase that is arranged on condenser exports and the liquid phase of evaporator enters the mouth, reservoir also is positioned at the top of dry-type transformer.At this moment, preferably, before the liquid phase of the evaporator inlet unidirectional valve, filter and electric insulation connector are set; And unidirectional valve and insulated connectors can be integrated as a whole.The diapire of reservoir tilts to the port of export of reservoir.Selectively, when reservoir was positioned at the top of dry-type transformer, condenser and reservoir can be combined into the condensation reservoir.
Selectively, further comprise the circulating pump that is arranged in the liquid pipe, at this moment, condenser and reservoir can be arranged on the optional position of dry-type transformer outside, above or below dry-type transformer.At this moment, preferably, before the liquid phase of the evaporator inlet unidirectional valve in parallel with circulating pump is set.
Selectively, further comprise the reservoir between the liquid phase that is arranged on condenser exports and the liquid phase of evaporator enters the mouth, reservoir is positioned at the below of dry-type transformer.At this moment, preferably, at least one capillary wick is set in the reservoir, capillary wick extends upwardly to the evaporator inlet place at least.
Wherein, coil block comprises the low-voltage coil and the high-tension coil that is positioned at the low-voltage coil periphery near iron core, be provided with the gap between low-voltage coil and the high-tension coil, evaporator can be arranged in this gap, perhaps, evaporator also can be arranged in the inside of low-voltage coil and/or high-tension coil, and perhaps, evaporator can be close to the outer surface of low-voltage coil.
Particularly, evaporator comprises at least one heat exchanger tube and/or heat exchanger plates.
Selectively, evaporator comprises the heat exchanger tube more than eight or eight, and the heat exchanger tube more than eight or eight is arranged in parallel between the liquid phase of evaporator inlet and vapor phase exit.Preferably, evaporator comprises manifold connector and following manifold connector.Herein, manifold connector is a kind of jockey that many pipes are connected with individual tubes or minority pipe.Last manifold connector and following manifold connector can further be provided with unidirectional valve, filter and/or temperature sensor such as armoured thermocouple.The vapor phase exit of evaporator and liquid phase inlet are separately positioned on manifold connector and following manifold connector, and the upper and lower side of the heat exchanger tube more than eight or eight is connected with last manifold device respectively and following manifold connector is communicated with.
Another mode is, the evaporator evaporation device can comprise endless tube and following endless tube, and the upper and lower side of the heat exchanger tube more than eight or eight can be communicated with last endless tube and following endless tube respectively.
Selectively, evaporator comprises the heat exchanger plates more than four or four, and the heat exchanger plates more than four or four is arranged in parallel between the liquid phase of evaporator inlet and vapor phase exit.
Selectively, evaporator comprises heat exchanger plates and the heat exchanger tube more than four or four more than four or four, and heat exchanger plates more than four or four and the heat exchanger tube more than four or four are arranged in parallel between the liquid phase of evaporator inlet and vapor phase exit.
Selectively, the heat exchanger tube of evaporator is made of the tubular type coil-winding of dry-type transformer.
Selectively, evaporator comprises at least one spirality heat exchanger tube around the low-voltage coil outer surface.
Selectively, heat exchanger plates and/or heat exchanger tube are arranged on the inside of low-voltage coil.
Preferably, the junction of evaporator and vapour phase pipeline and liquid pipe is respectively equipped with insulated connectors, comprises the integrated insulated connectors of unidirectional valve, filter and manifold connector.
Selectively, comprise the heat exchanger tube of many parallel connections, every heat exchanger tube can be wavy or pulse type, and is perhaps similar stepped.
Selectively, many heat exchanger tubes can be interlaced stacked.
Selectively, the cross section of heat exchanger tube evaporator can be round, also can be flat partially; Along the direction of heat exchanger tube, tube wall can be pressed into the shape that matches with coil shape, to increase heat exchange area.
In addition, also can be provided with miscellaneous parts such as valve, filter in the loop.
The invention has the beneficial effects as follows: 1, the mode of the present invention's employing inner direct evaporation-condensation in the loop, and utilize evaporation that portion of hot is converted into the kinetic energy of steam and the potential energy of liquid, driving or part drive circuit cycle, realize that transformer dispels the heat efficiently; 2, evaporation-condensation process of the present invention occurs in the inside in loop fully, and therefore, the volume of cooling circuit structure is little, and required cooling working medium is also few; 3, radiating mode of the present invention can also dwindle the gap between low-voltage coil and the high-tension coil, thereby dwindles volume of transformer, saving material.
Below in conjunction with drawings and Examples, further specify the present invention, but the present invention is not limited to these embodiment, any on essence spirit of the present invention improvement or substitute, still belong to scope required for protection in claims of the present invention.
Description of drawings
Fig. 1 is the schematic diagram of the dry-type transformer of the embodiment of the invention 1.
Fig. 2 is the schematic diagram of the dry-type transformer of the embodiment of the invention 2.
Fig. 3 is the schematic diagram of the dry-type transformer of the embodiment of the invention 3.
Fig. 4 is the horizontal cross-sectional schematic of a kind of cage heat pipe evaporator structure of the present invention.
Fig. 5 is vertical cross-sectional schematic of a kind of cage heat pipe evaporator structure of the present invention.
Fig. 6 is the horizontal cross-sectional schematic of a kind of plate-type heat-pipe evaporator structure of the present invention.
Fig. 7 is vertical cross-sectional schematic of a kind of plate-type heat-pipe evaporator structure of the present invention.
Fig. 8 is the schematic diagram of a kind of dry-type three-phase transformer of the present invention.
Fig. 9 is the horizontal cross-sectional schematic of a kind of pulsation type heat pipe evaporator structure of the present invention.
Figure 10 is vertical cross-sectional schematic of a kind of pulsation type heat pipe evaporator structure of the present invention.
Figure 11 is the schematic diagram of a kind of stepped heat pipe evaporator structure of pulsing of the present invention.
Figure 12 is the schematic diagram of a kind of electric insulation manifold connector structure of the present invention, and wherein (a) is the longitudinal sectional drawing of last manifold connector; (b) be the longitudinal sectional drawing of following manifold connector; (c) be the transverse cross-sectional view of manifold connector and evaporator link.
The schematic diagram that Figure 13 constructs for the another kind of insulated connectors that the present invention adopts.
Figure 14 is for being the schematic perspective view of a kind of cage radiator structure of the present invention.
Embodiment
Embodiment 1
Please refer to Fig. 1, present embodiment adopts a kind of dry-type transformer two phase heat-radiation loop structure of evaporation-weight-driven.This dry-type transformer can be three-phase transformer, comprises three iron cores, as shown in Figure 8.Now describe with an iron core.The coil block that iron core 30 and wound core 30 are provided with, and coil block generally comprises low-voltage coil 50 and high-tension coil 70, is provided with the gap 57 that is full of the electric insulation filler between low-voltage coil 50 and the high-tension coil 70.
This two phase heat-radiation loop comprises that the coil block with dry-type transformer inside has the evaporator 100 of good thermo-contact, the condenser 300 that is in the transformer outside and reservoir 500, and constitutes the loop by fluid circuit (comprising vapour phase pipeline 610 and liquid pipe 630).Evaporator 100 can adopt (but being not limited to) to be close to the helix tube 130 that low-voltage coil 50 outer surfaces are provided with, and import and export adopts electric insulation connector (figure does not show), with the formation fluid loop, but does not constitute electric loop, to reduce eddy current loss.Wherein, helix tube 130 forms with copper tube or stainless steel tube coiling in low-voltage coil 50 outsides, and prepared metallic coil will have good thermo-contact with low-voltage coil 50.
Can integrate condenser 300, reservoir 500 by design, make reservoir 500 possess the function of condensation and cooling, make the level change of reservoir 500 inside little simultaneously.
When transformer was worked, the heat of its generation made the liquid evaporation in the evaporator 100 become steam, because the density of steam is low, steam rises, and cohesion is liquid in condenser 300; All be full of steam or liquid-vapour two-phase mixture in the pipeline 300 owing to evaporator 100 inside and from evaporator 100 to condenser, the full of liquid then 100 from reservoir 500 to evaporator, under the effect of gravity, the downward liquid flow that density is high, thus constitute a two-phase circulation circuit.The maximum driving force in loop depends on vapor content and reservoir 500 height with respect to evaporator 100; And the flow in loop depends on evaporation capacity (caloric value of transformer).At the inlet of evaporator 100, can connect an orifice restriction valve (figure does not show) according to need.
Its advantage is to need not external drive (energy consumption), movement-less part.
Embodiment 2
Please refer to Fig. 2, present embodiment adopts the power-actuated dry-type transformer two phase heat-radiation loop of a kind of capillary structure.Wherein, reservoir 500 places the below in loop, from reservoir 500 to evaporator 100, capillary wick 700 is arranged in the pipeline, the effect of liquid antigravity is climbed to evaporator 100, and evaporation is absorbed heat evaporator 100 in.Steam rises to condenser 300 and condenses again for behind the liquid, and 500 pipeline turns back to reservoir 500 along condenser 300 to reservoir.By design, reservoir 500 can have the function that liquid is further cooled off.The size of this structure actuating force depends on the capillary force of wick 700, and maximum stream flow depends on the actuating force and the flow resistance of wick 700.Evaporator 100 can adopt (but being not limited to) to be close to the helix tube 130 that low-voltage coil 50 outer surfaces are provided with.
Embodiment 3
Please refer to Fig. 2, the dry-type transformer two phase heat-radiation loop structure that present embodiment adopts a kind of circulating pump to drive.Wherein, reservoir 500 places going up most of loop or below, and it plays the compensating liquid effect; When the operating pressure on the loop required to be higher than an atmospheric pressure, it was in the top, loop; And operating pressure is when requiring to be lower than an atmospheric pressure, and it is in below, loop.To evaporator 100, and evaporation heat absorption in evaporator 100 forms two-phase fluid and flow to condenser 300 on continuing liquid in the effect current downflow of pump 800, and the two-phase fluid cohesion sucks back to the inlet of pump 800 for behind the liquid, forms a circulation.
Because the loop is driven by circulating pump 800, therefore, its flow and evaporation capacity are irrelevant, and the heat-sinking capability of system depends on the area of dissipation of fin on the condenser 300.Also can further adopt electric fan (figure does not show), the mode by forced convertion (even spraying) can obviously strengthen the heat-sinking capability on the condenser 300.Evaporator 100 can adopt, but is not limited to, and is close to the helix tube 130 that low-voltage coil 50 outer surfaces are provided with, and import and export adopts electric insulation connector (figure does not show), with the formation fluid loop, but does not constitute electric loop, to reduce eddy current loss.
To the loop of reservoir above transformer, selectively, the unidirectional valve in parallel with circulating pump is installed at evaporator inlet, when transformer is in or during near zero load (lower calorific value), needn't starts circulating pump, only dispel the heat by the working method of embodiment 1.
Embodiment 4
As another kind of scheme of the present invention, other parts are identical with embodiment 1,2 or 3, and difference is: for powerful transformer, its low-voltage coil 50 can form with the copper tube coiling; Copper pipe conduction itself is made evaporator 100 and is used in the pipe.
Embodiment 5
As another kind of scheme of the present invention, other parts are identical with embodiment 1,2 or 3, and difference is: as Fig. 4, shown in Figure 5, evaporator 100 is the cage heat pipe evaporator.This evaporator 100 is formed by connecting (non-closed annular pipe 156 is in order to suppress eddy current loss) with the ring pipe 156 of upper and lower two non-closures respectively by the heat exchanger tube 150 of orientation up and down, is the fluid flow channel structure of a parallel connection; Upper and lower ring pipe 156 is respectively the export and import of evaporator 100.
Embodiment 6
As another kind of scheme of the present invention, other parts are identical with embodiment 1,2 or 3, and difference is: as Fig. 6, shown in Figure 7, evaporator 100 adopts plate-type heat-pipe or " hot plate " evaporator 100.Similar to cage heat pipe evaporator 100, several pipes are changed into the hollow thin plate 160, with internal structure can increase contact (heat exchange) area, and two can save the space of evaporator 100.
The upper and lower end of " hot plate " is formed by connecting with the ring pipe 166 of upper and lower two non-closures respectively, and upper and lower ring pipe 166 is respectively the export and import of evaporator 100.
Because " hot plate " is thin, be installed in the inside of low-voltage coil 50 in the present embodiment, strengthen radiating effect.
Simultaneously, in this embodiment, also adopted the heat exchanger tube 150 of orientation up and down.
Embodiment 7
As another kind of scheme of the present invention, other parts are identical with embodiment 6, difference is: hollow thin plate 160 is installed between low-voltage coil 50 and the high-tension coil 70 and is provided with in the gap 57, and (gap 57 in casting insulated fillers), and be close to the outer surface of low-voltage coil 50.And, can not establish the heat exchanger tube 150 of orientation up and down.
Embodiment 8
As another kind of scheme of the present invention, other parts are identical with embodiment 1,2 or 3, and difference is: the heat exchanger tube 150 of evaporator 100 adopts as Fig. 9, pulsating shown in Figure 10 and constructs.
Embodiment 9
As another kind of scheme of the present invention, other parts are identical with embodiment 1,2 or 3, and difference is: the heat exchanger tube 150 of evaporator 100 adopts stepped pulsation structure as shown in figure 11.
Embodiment 10
As another kind of scheme of the present invention, other parts are identical with embodiment 5, and difference is: as shown in figure 14, heat exchanger tube 1030 is connected with the upper and lower manifold connector 960,970 of electric insulation respectively, forms cage " radiator structure.This manifold connector can be with (but being not limited to) armoured thermocouple 1000, be combined into an integral body, its structure is shown in Figure 12 (a)-(c), wherein, Figure 12 (a) is the longitudinal sectional drawing of last manifold connector 960, and it comprises armoured thermocouple 1000, electrical insulating material 950, manifold passage 1010 and gas exit passageway 1020; (b) be the longitudinal sectional drawing of following manifold connector 970, it comprises armoured thermocouple 1000, electrical insulating material 950, unidirectional valve 990, filter 995, manifold passage 1010 and liquid inlet channel 1025; (c) be the transverse cross-sectional view of manifold connector and evaporator link.
In addition, further as different from Example 5, the coil of this embodiment can be columniform.
Embodiment 11
As another kind of scheme of the present invention, other parts are identical with embodiment 1, difference is: adopt insulated connectors as shown in figure 13 that liquid is connected to evaporator, this insulated connectors can be combined into an integral body with band armoured thermocouple 1000, electric insulation unidirectional valve 990 and filter 995.
Claims (10)
1. dry-type transformer with vapour-liquid two phase heat-radiation loop, comprise at least one iron core and the coil block that at least one is provided with around described iron core, it is characterized in that, described dry-type transformer has at least one vapour-liquid two phase heat-radiation loop, and described vapour-liquid two phase heat-radiation loop comprises the evaporator that is arranged on described coil block zone, be arranged on the condenser of described dry-type transformer outside, be connected the vapour phase pipeline between the vapour phase inlet of the vapor phase exit of described evaporator and described condenser, liquid pipe between the liquid phase outlet that is connected described condenser enters the mouth with the liquid phase of described evaporator, and the vapour-liquid two-phase working substance that in described vapour-liquid two phase heat-radiation loop, circulates; Described dry-type transformer further comprises the reservoir of the liquid phase of the liquid phase outlet that is arranged on described condenser and described evaporator between entering the mouth.
2. dry-type transformer as claimed in claim 1 is characterized in that described condenser is arranged on the top of described dry-type transformer, and described reservoir is positioned at the top of described dry-type transformer.
3. the dry-type transformer with vapour-liquid two phase heat-radiation loop as claimed in claim 2 is characterized in that it further comprises the circulating pump that is arranged in the described liquid pipe.
4. dry-type transformer as claimed in claim 1 is characterized in that described reservoir is positioned at the below of described dry-type transformer, and at least one capillary wick is set in the described reservoir, and described capillary wick extends upwardly to described evaporator inlet place at least.
5. as the described dry-type transformer of one of claim 1～4, it is characterized in that, described evaporator comprises at least one heat exchanger tube and/or heat exchanger plates, described coil block comprises low-voltage coil and high-tension coil, be provided with the gap that is full of the electric insulation filler between described low-voltage coil and the described high-tension coil, described heat exchanger plates and/or heat exchanger tube are arranged in the described gap or are arranged in the inside of described low-voltage coil and/or high-tension coil.
6. dry-type transformer as claimed in claim 5, it is characterized in that, described evaporator comprises the heat exchanger tube more than eight or eight, perhaps described evaporator comprises the heat exchanger plates more than four or four, and perhaps described evaporator comprises heat exchanger plates and the heat exchanger tube more than four or four more than four or four; Wherein, described heat exchanger tube and/or described heat exchanger plates are arranged in parallel between the liquid phase of described evaporator inlet and vapor phase exit.
7. dry-type transformer as claimed in claim 6, it is characterized in that, described evaporator further comprises the last manifold connector and the following manifold connector of electric insulation, the vapor phase exit of described evaporator and liquid phase inlet are separately positioned on described manifold connector and the following manifold connector gone up, and the upper and lower side of described heat exchanger tube and/or described heat exchanger plates is communicated with following manifold connector with the described manifold connector of going up respectively.
8. as the described dry-type transformer of one of claim 1～4, it is characterized in that described evaporator comprises at least one spirality heat exchanger tube around described low-voltage coil.
9. as the described dry-type transformer of one of claim 1～4, it is characterized in that the heat exchanger tube of described evaporator is made of the tubular type coil-winding of described dry-type transformer.
10. dry-type transformer as claimed in claim 7 is characterized in that, the described manifold connector of going up further is provided with unidirectional valve, filter and/or temperature sensor with following manifold connector.
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| CN2008100274379A CN101325118B (en) | 2008-04-14 | 2008-04-14 | Dry-type transformer with vapour-liquid two phase heat-radiation loop |
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| CN2008100274379A CN101325118B (en) | 2008-04-14 | 2008-04-14 | Dry-type transformer with vapour-liquid two phase heat-radiation loop |
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| WO2010139597A1 (en) * | 2009-06-05 | 2010-12-09 | Abb Technology Ag | Transformer coil and transformer having passive cooling |
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| CN102109258B (en) * | 2010-08-05 | 2013-03-13 | 中国科学院理化技术研究所 | Cryogenic loop heat pipe device |
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| WO2016086495A1 (en) * | 2014-12-02 | 2016-06-09 | 北京空间飞行器总体设计部 | Gravity-driven two-phase fluid loop |
| CN106876114A (en) * | 2017-04-18 | 2017-06-20 | 江西明正变电设备有限公司 | A kind of dry-type transformer |
| CN107863228B (en) * | 2017-12-12 | 2019-09-03 | 贵州电网有限责任公司凯里剑河供电局 | Distribution transforming heat dissipation temperature-controlling system based on platform area measure and control device |
| US10590916B2 (en) | 2018-01-22 | 2020-03-17 | General Electric Company | Multisiphon passive cooling system |
| EP3517777B1 (en) * | 2018-01-30 | 2021-09-01 | General Electric Company | Multisiphon passive cooling system |
| CN110613172B (en) * | 2019-09-30 | 2023-04-18 | 深圳麦克韦尔科技有限公司 | Electronic atomization device and atomizer thereof |
| CN113470939B (en) * | 2021-06-18 | 2024-02-02 | 江苏新特变科技股份有限公司 | Cooling structure of dry-type transformer |
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