CN111313285A - Novel box-type substation heat dissipation device with self-contained power supply - Google Patents

Novel box-type substation heat dissipation device with self-contained power supply Download PDF

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Publication number
CN111313285A
CN111313285A CN202010207874.XA CN202010207874A CN111313285A CN 111313285 A CN111313285 A CN 111313285A CN 202010207874 A CN202010207874 A CN 202010207874A CN 111313285 A CN111313285 A CN 111313285A
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CN
China
Prior art keywords
heat dissipation
box
aluminum box
dissipation aluminum
cabinet
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Granted
Application number
CN202010207874.XA
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Chinese (zh)
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CN111313285B (en
Inventor
张龙
蔡秀东
周坤
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Yangzhou Lejun Electronic Technology Co Ltd
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Yangzhou Lejun Electronic Technology Co Ltd
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Priority to CN202010207874.XA priority Critical patent/CN111313285B/en
Publication of CN111313285A publication Critical patent/CN111313285A/en
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Publication of CN111313285B publication Critical patent/CN111313285B/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56Cooling; Ventilation
    • H02B1/565Cooling; Ventilation for cabinets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/30Cabinet-type casings; Parts thereof or accessories therefor

Abstract

The invention relates to the technical field of self-contained power supply heat dissipation, and discloses a novel box-type substation heat dissipation device with a self-contained power supply, which comprises a cabinet, wherein four corners of the bottom of the cabinet are fixedly connected with rubber bases, and the top of the cabinet is fixedly connected with a solar photovoltaic panel; the rear side of the inner cavity of the cabinet is vertically and upwards fixedly connected with a heat-radiating aluminum box. According to the invention, the two butt joint through pipes at the rear side of the rectangular-square-shaped heat dissipation aluminum box are hermetically inserted in the butt joint holes of the heat dissipation aluminum box, the oil in the oil tank is sucked into the heat dissipation aluminum box by the later-stage suction pump and enters the rectangular-square-shaped heat dissipation aluminum box through the butt joint holes, the heat of the power converter is fully cooled and dissipated in an all-round manner, and the heat dissipation efficiency is higher; when more hot air exists in the heat dissipation aluminum box, the hot air is discharged through the one-way valve and the air escape valve, so that the condition that the heat cannot be dissipated inside is avoided; meanwhile, the four groups of exhaust fans work to fully exhaust heat on the radiating fins, and the radiating effect is ensured.

Description

Novel box-type substation heat dissipation device with self-contained power supply
Technical Field
The invention relates to the technical field of self-contained power supply heat dissipation, in particular to a novel box-type substation heat dissipation device with a self-contained power supply.
Background
At present, the high-voltage cabinet and the low-voltage cabinet of the existing box-type transformer substation are generally arranged at two opposite sides of a transformer, the transformer can only be provided with heat dissipation devices at the other two sides, namely, double-sided heat dissipation is adopted, and in addition, other auxiliary heat dissipation structures are not arranged. In a damp and hot area, particularly in a Yangtze river basin, the temperature is high in summer and the humidity is high, if the transformer substation heat dissipation device with the structure is adopted, the temperature of equipment in the transformer substation is high, and when the transformer is in an upper temperature limit state for a long time, the operation of the equipment is not favorable, and the service life of the transformer is seriously influenced.
The heat dissipation mechanism arranged in the technical scheme only sets the heat conduction plate for transferring and dissipating heat, but only dissipates heat of the rear side wall of the power converter, and the heat dissipation effect is poor; and the air pressure in the heat dissipation aluminum box is increased due to the temperature rise, and the formed heat cannot be discharged in time, so that the final heat dissipation effect is influenced.
Disclosure of Invention
The invention aims to provide a novel box-type substation heat dissipation device with a self-contained power supply, which solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a novel box-type substation heat dissipation device with a self-contained power supply comprises a cabinet, wherein four corners of the bottom of the cabinet are fixedly connected with rubber bases, the top of the cabinet is fixedly connected with a solar photovoltaic panel, and rectangular through holes are transversely formed in the positions, which are positioned on the two sides of the right side of the cabinet and are inclined to the rear, of the cabinet; a heat dissipation aluminum box is vertically and upwards fixedly connected to the rear side of the inner cavity of the cabinet, an oil liquid tank and a suction pump are fixedly connected to the bottom of the inner cavity of the cabinet, a suction port of the suction pump is fixedly communicated with the right side wall of the oil liquid tank, a liquid outlet of the suction pump is fixedly communicated with the head end of an injection pipe, and the tail end of the injection pipe is fixedly communicated with the lower part of the front side of the heat dissipation aluminum box;
the left side of the upper part of the heat-dissipation aluminum box is fixedly communicated with an air release pipe, the lower end part of the air release pipe is fixedly communicated with a one-way valve, the upper part of the left side of the front side of the heat-dissipation aluminum box is fixedly connected with a storage battery, the head end part of a return pipe is fixedly communicated with the left upper part of the front side of the heat-dissipation aluminum box, and the tail end of the return pipe is fixedly communicated with; four threaded screw rods distributed in a matrix are vertically and fixedly connected to the front part of the heat-dissipation aluminum box, and four bolt holes distributed in a matrix are horizontally and outwards formed in the front side of the heat-dissipation aluminum box; a transformer is arranged on the front side of the heat dissipation aluminum box, and four corners of the transformer are fixedly connected with bolt holes through fixing bolts;
the front part of the heat dissipation aluminum box positioned at the periphery of the power converter is connected with a rectangular-square heat dissipation aluminum box, four corners of the rectangular-square heat dissipation aluminum box are vertically provided with through holes, and the through holes are in through connection with the threaded screw rods; the middle positions of the upper part and the lower part of the back side of the rectangular radiating aluminum box are vertically and fixedly communicated with a butt joint through pipe, a butt joint hole matched with the butt joint through pipe is fixedly and vertically formed in the front side of the radiating aluminum box, and a controller is fixedly connected to the front part of the radiating aluminum box below the rectangular radiating aluminum box; fixedly connected with radiating fin on the rack that is located radiating aluminum box rear side wall, be located the rack rear side wall fixed cover in the rectangle opening outside has closed the apron, and the outside fixedly connected with four fans that are the matrix distribution of apron upper level.
As a preferred embodiment of the present invention, the left side of the front of the cabinet is fixedly hinged with the cabinet door through two vertically aligned hinges; the middle part of the cabinet door is fixedly embedded with a transparent panel.
As a preferred embodiment of the present invention, the solar photovoltaic panel is electrically connected to the storage battery.
In a preferred embodiment of the present invention, the distance from the upper port of the return pipe to the upper end surface of the heat dissipation aluminum box is 7 cm.
In a preferred embodiment of the present invention, the clip-shaped heat dissipating aluminum case is attached to an outer side of the power converter.
In a preferred embodiment of the present invention, the threaded screw is screwed and fixed with a nut through an end portion of the through hole.
As a preferred embodiment of the present invention, the heat dissipation fins are located in the rectangular through holes, and the cabinet is an aluminum alloy cabinet.
As a preferred embodiment of the present invention, a silicone grease coating is applied to a joint between the rear side of the heat dissipation aluminum box and the inner wall of the inner cavity of the cabinet.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the two butt joint through pipes at the rear side of the rectangular-square-shaped heat dissipation aluminum box are hermetically inserted in the butt joint holes of the heat dissipation aluminum box, the oil in the oil tank is sucked into the heat dissipation aluminum box by the later-stage suction pump and enters the rectangular-square-shaped heat dissipation aluminum box through the butt joint holes, the heat of the power converter is fully cooled and dissipated in an all-round manner, and the heat dissipation efficiency is higher; when more hot air exists in the heat dissipation aluminum box, the hot air is discharged through the one-way valve and the air release valve, so that the condition that the heat cannot be dissipated inside is avoided; meanwhile, the four groups of exhaust fans work to fully exhaust heat on the radiating fins, and the radiating effect is ensured.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic overall structure diagram of a novel box-type substation heat dissipation device with a self-contained power supply according to the invention;
fig. 2 is a schematic structural diagram of a front view of an inner cavity of a case of the novel box-type substation heat dissipation device with a self-contained power supply of the invention;
fig. 3 is a schematic structural diagram of a structure that a threaded screw rod, a butt joint hole and a bolt hole of the novel box-type substation heat dissipation device with a self-contained power supply are distributed on a heat dissipation aluminum box in a front view;
fig. 4 is a schematic structural diagram of the distribution position of the butt-joint through pipe of the novel box-type substation heat dissipation device with the self-contained power supply at the rear side of the square-type heat dissipation aluminum box;
FIG. 5 is a schematic structural diagram of a rear view of the novel box-type substation heat dissipation device with a self-contained power supply, in which heat dissipation fins are distributed on the rear side of a cabinet;
fig. 6 is a schematic diagram of the distribution structure of the exhaust fan of the novel box-type substation heat dissipation device with the self-contained power supply on the cabinet;
fig. 7 is a schematic view of a connection overlooking structure of a heat-dissipating aluminum box and a rectangular-shaped heat-dissipating aluminum box of the novel box-type substation heat-dissipating device with a self-contained power supply of the invention.
In the figure: the solar photovoltaic panel heat dissipation device comprises a cabinet 1, a transparent panel 2, a cabinet door 3, a hinge 4, a rubber base 5, a rectangular through opening 6, a solar photovoltaic panel 7, a heat dissipation aluminum box 8, a threaded screw rod 9, a fixing bolt 10, a power converter 11, a clip heat dissipation aluminum box 12, a return pipe 13, a nut 14, an oil tank 15, a suction pump 16, an injection pipe 17, a controller 18, an air release pipe 19, a one-way valve 20, a butt joint hole 21, a storage battery 22, a bolt hole 23, a butt joint through pipe 24, a through opening 25, a heat dissipation fin 26, a suction fan 27 and a cover plate 28.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention; in the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-7, the present invention provides a technical solution: a novel box-type substation heat dissipation device with a self-contained power supply comprises a cabinet 1, wherein four corners of the bottom of the cabinet 1 are fixedly connected with rubber bases 5, the top of the cabinet 1 is fixedly connected with a solar photovoltaic panel 7, and rectangular through holes 6 are transversely formed in positions which are located at the rear parts of two sides of the right side of the cabinet 1; a heat dissipation aluminum box 8 is vertically and upwards fixedly connected to the rear side of an inner cavity of the machine cabinet 1, an oil liquid box 15 and a suction pump 16 are fixedly connected to the bottom of the inner cavity of the machine cabinet 1, a suction port of the suction pump 16 is fixedly communicated with the right side wall of the oil liquid box 15, a liquid outlet of the suction pump 16 is fixedly communicated with the head end of an injection pipe 17, the tail end of the injection pipe 17 is fixedly communicated with the lower part of the front side of the heat dissipation aluminum box 8, the suction pump 16 works in the later period to suck oil liquid in the oil liquid box 15 into the heat dissipation aluminum box 8 and enter a return type heat dissipation aluminum box 12 through a butt joint hole 21, and heat of the;
the left side of the upper part of the heat-dissipation aluminum box 8 is fixedly communicated with an air release pipe 19, the lower end part of the air release pipe 19 is fixedly communicated with a one-way valve 20, the upper part of the heat-dissipation aluminum box 8 is fixedly connected with a storage battery 22, the left upper part of the front side of the heat-dissipation aluminum box 8 is fixedly communicated with the head end part of the return pipe 13, and the tail end of the return pipe 13 is fixedly communicated with the upper part of the oil tank; four threaded screw rods 9 which are distributed in a matrix form are vertically and fixedly connected to the front part of the heat dissipation aluminum box 8, and four bolt holes 23 which are distributed in a matrix form are horizontally and outwards formed in the front side of the heat dissipation aluminum box 8; a transformer 11 is arranged on the front side of the heat dissipation aluminum box 8, four corners of the transformer 11 are fixedly connected with bolt holes 23 through fixing bolts 10, the rectangular heat dissipation aluminum box 12 can be firstly dismounted during later dismounting, then the transformer 11 is overhauled, and the space is not affected;
the front part of a heat dissipation aluminum box 8 positioned on the periphery of the power converter 11 is connected with a rectangular-square heat dissipation aluminum box 12, four corners of the rectangular-square heat dissipation aluminum box 12 are vertically provided with through holes 25, and the through holes 25 are in penetrating connection with a threaded screw rod 9; a butt joint through pipe 14 is vertically and fixedly communicated with the middle positions of the upper part and the lower part of the rear side of the rectangular-shaped heat dissipation aluminum box 12, a butt joint hole 21 matched with the butt joint through pipe 14 is fixedly and vertically formed in the front side of the heat dissipation aluminum box 8, and a controller 18 is fixedly connected to the front part of the heat dissipation aluminum box 8 below the rectangular-shaped heat dissipation aluminum box 12; fixedly connected with radiating fin 26 on the rack 1 that is located 8 rear side walls of heat dissipation aluminium box, the fixed lid of rack 1 rear side walls that is located the rectangle opening 6 outside has closed apron 28, and the outer fixedly connected with four suction fans 27 that are the matrix distribution of apron 28 upper level, and the abundant pump drainage of heat on radiating fin 26 is come out in the work of four group suction fans 27 simultaneously, guarantees the radiating effect.
In the embodiment, the left side of the front part of the cabinet 1 is fixedly hinged with a cabinet door 3 through two vertically aligned hinges 4; the fixed embedding in 3 middle parts of cabinet door has transparent panel 2, makes things convenient for operating personnel to see through transparent panel 2 and observes 1 inside condition of rack.
In this embodiment, the solar photovoltaic panel 7 is electrically connected with the storage battery 22, and the storage battery 22 can guarantee power supply operation for a heat dissipation fan and a suction pump of the emergency power converter.
In this embodiment, the distance from the upper port of the return pipe 13 to the upper end face of the heat dissipation aluminum box 8 is 7cm, so as to ensure that the oil does not overflow from the air release pipe 19.
In this embodiment, the clip-shaped heat dissipation aluminum box 12 is attached to the outside of the power converter 11, so as to ensure better heat transfer.
In this embodiment, the threaded screw 9 is screwed and fixed with a nut 14 at an end portion penetrating the through hole 25.
In this embodiment, radiating fin 26 is located rectangle opening 6, and rack 1 is the aluminum alloy cabinet, and the heat conduction radiating effect is better.
In this embodiment, the silicone grease coating has been paintd to 8 rear sides of heat dissipation aluminium boxes and 1 inner chamber inner wall laminating departments of rack, improves heat conduction efficiency.
When the novel box-type substation heat dissipation device with the self-contained power supply is used, it is required to be explained that the novel box-type substation heat dissipation device with the self-contained power supply comprises a cabinet 1, a transparent panel 2, a cabinet door 3, a hinge 4, a rubber base 5, a rectangular through hole 6, a solar photovoltaic panel 7, a heat dissipation aluminum box 8, a threaded lead screw 9, a fixing bolt 10, a power converter 11, a return type heat dissipation aluminum box 12, a return pipe 13, a nut 14, an oil tank 15, a suction pump 16, an injection pipe 17, a controller 18, an air escape pipe 19, a check valve 20, a butt joint hole 21, a storage battery 22, a bolt hole 23, a butt joint through pipe 24, a through hole 25, a heat dissipation fin 26, a suction fan 27 and a cover plate 28, wherein the components are all universal standard components or components known by technical personnel in, the structure and principle are known to the skilled person through technical manuals or through routine experimentation.
When the heat dissipation aluminum box is used, the power converter 11 is fixed on the heat dissipation aluminum box 8 through the fixing bolt 10, the return type heat dissipation aluminum box 12 penetrates through the through hole 25 and the threaded screw rod 9 on the heat dissipation aluminum box 8, then the nut 14 is fixedly connected to the threaded screw rod 9, two butt joint through pipes 24 on the rear side of the return type heat dissipation aluminum box 12 are hermetically inserted into butt joint holes 21 of the heat dissipation aluminum box 8, the later suction pump 16 works to suck oil in the oil tank 15 into the heat dissipation aluminum box 8 and into the return type heat dissipation aluminum box 12 through the butt joint holes 21, heat of the power converter 11 is fully cooled and dissipated in an omnibearing manner, when more hot air exists in the heat dissipation aluminum box 8, the heat is dissipated through the check valve 20 and the air escape valve 19, and the situation that heat cannot be dissipated inside is avoided; meanwhile, the four groups of exhaust fans 27 work to sufficiently exhaust the heat on the radiating fins 26, so that the radiating effect is ensured.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. The utility model provides a novel box-type substation heat abstractor of area self-contained power supply, includes rack (1), its characterized in that: the four corners of the bottom of the cabinet (1) are fixedly connected with rubber bases (5), the top of the cabinet (1) is fixedly connected with a solar photovoltaic panel (7), and rectangular through holes (6) are transversely formed in the positions, which are positioned on the two sides of the right side of the cabinet (1) and are inclined to the rear; a heat dissipation aluminum box (8) is vertically and upwards fixedly connected to the rear side of an inner cavity of the cabinet (1), an oil liquid tank (15) and a suction pump (16) are fixedly connected to the bottom of the inner cavity of the cabinet (1), a suction port of the suction pump (16) is fixedly communicated with the right side wall of the oil liquid tank (15), a liquid outlet of the suction pump (16) is fixedly communicated with the head end of an injection pipe (17), and the tail end of the injection pipe (17) is fixedly communicated with the lower portion of the front side of the heat dissipation aluminum box (8);
the left side of the upper part of the heat-dissipation aluminum box (8) is fixedly communicated with an air release pipe (19), the lower end part of the air release pipe (19) is fixedly communicated with a one-way valve (20), the upper part of the heat-dissipation aluminum box (8) is fixedly connected with a storage battery (22), the upper left part of the front side of the heat-dissipation aluminum box (8) is fixedly communicated with the head end part of a return pipe (13), and the tail end of the return pipe (13) is fixedly communicated with the upper part of an oil liquid tank (15); four threaded screw rods (9) which are distributed in a matrix form are vertically and fixedly connected to the front part of the heat dissipation aluminum box (8), and four bolt holes (23) which are distributed in a matrix form are horizontally and outwards formed in the front side of the heat dissipation aluminum box (8); a power converter (11) is arranged on the front side of the heat dissipation aluminum box (8), and four corners of the power converter (11) are fixedly connected with bolt holes (23) through fixing bolts (10);
the front part of a heat dissipation aluminum box 8 positioned on the periphery of the power converter (11) is connected with a clip-shaped heat dissipation aluminum box (12), four corners of the clip-shaped heat dissipation aluminum box (12) are vertically provided with through holes (25), and the through holes (25) are in penetrating connection with a threaded screw rod (9); a butt joint through pipe (14) is vertically and fixedly communicated with the middle positions of the upper part and the lower part of the rear side of the rectangular-shaped heat dissipation aluminum box (12), a butt joint hole (21) matched with the butt joint through pipe (14) is vertically and fixedly formed in the front side of the heat dissipation aluminum box (8), and a controller (18) is fixedly connected to the front part of the heat dissipation aluminum box (8) below the rectangular-shaped heat dissipation aluminum box (12); fixedly connected with radiating fin (26) is gone up in rack (1) that is located heat dissipation aluminium box (8) rear wall, is located rack (1) rear wall fixed cover in the rectangle opening (6) outside has apron (28), and the outside fixedly connected with four fans (27) that are the matrix and distribute of level on apron (28).
2. The novel box-type substation heat dissipation device with the self-contained power supply of claim 1 is characterized in that: the left side of the front part of the cabinet (1) is fixedly hinged with a cabinet door (3) through two vertically aligned hinges (4); the middle part of the cabinet door (3) is fixedly embedded with a transparent panel (2).
3. The novel box-type substation heat dissipation device with the self-contained power supply of claim 1 is characterized in that: the solar photovoltaic panel (7) is electrically connected with the storage battery (22).
4. The novel box-type substation heat dissipation device with the self-contained power supply of claim 1 is characterized in that: the distance between the upper port of the return pipe (13) and the upper end face of the heat dissipation aluminum box (8) is 7 cm.
5. The novel box-type substation heat dissipation device with the self-contained power supply of claim 1 is characterized in that: the clip-shaped heat dissipation aluminum box (12) is attached to the outer side of the power converter (11).
6. The novel box-type substation heat dissipation device with the self-contained power supply of claim 1 is characterized in that: the threaded screw rod (9) penetrates through the end part of the through hole (25) and is screwed and fixed with a nut (14).
7. The novel box-type substation heat dissipation device with the self-contained power supply of claim 1 is characterized in that: the radiating fins (26) are located in the rectangular through holes (6), and the cabinet (1) is an aluminum alloy cabinet.
8. The novel box-type substation heat dissipation device with the self-contained power supply of claim 1 is characterized in that: and a silicone grease coating is coated on the joint of the rear side of the heat dissipation aluminum box (8) and the inner wall of the inner cavity of the cabinet (1).
CN202010207874.XA 2020-03-23 2020-03-23 Novel box-type substation heat dissipation device with self-contained power supply Active CN111313285B (en)

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CN111313285B CN111313285B (en) 2021-07-06

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CN209844816U (en) * 2019-02-18 2019-12-24 深圳市永鑫旺科技有限公司 Rainproof cabinet type frequency converter with rapid heat dissipation
CN210075867U (en) * 2018-12-14 2020-02-14 深圳市汇川技术股份有限公司 Liquid-cooled frequency converter system
CN210157073U (en) * 2019-08-07 2020-03-17 浙江华昕智能科技有限公司 Novel special converter of water pump

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004011962A (en) * 2002-06-04 2004-01-15 Nippon Telegraph & Telephone East Corp Water-cooling apparatus
CN201115229Y (en) * 2007-06-14 2008-09-10 讯凯国际股份有限公司 A heat exchange structure and heat radiation device with this structure
CN203617583U (en) * 2013-12-23 2014-05-28 成都蜀奥电气设备有限公司 A novel box type transformer substation heat radiation apparatus with a stand-by power supply
CN107454798A (en) * 2017-07-24 2017-12-08 池州市勇攀智岩机电有限公司 A kind of clean energy resource equipment cooling device
CN108832228A (en) * 2018-06-20 2018-11-16 安徽知之信息科技有限公司 A kind of water circle device of new energy car battery case
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CN210157073U (en) * 2019-08-07 2020-03-17 浙江华昕智能科技有限公司 Novel special converter of water pump

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