CN111525418B - Heat dissipation box and cubical switchboard - Google Patents
Heat dissipation box and cubical switchboard Download PDFInfo
- Publication number
- CN111525418B CN111525418B CN202010366558.7A CN202010366558A CN111525418B CN 111525418 B CN111525418 B CN 111525418B CN 202010366558 A CN202010366558 A CN 202010366558A CN 111525418 B CN111525418 B CN 111525418B
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 97
- 238000009423 ventilation Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention belongs to the technical field of electrical heat dissipation equipment, and discloses a heat dissipation box body which comprises a shell, a primary heat dissipation assembly and a secondary heat dissipation assembly; the primary heat dissipation assembly comprises a primary heat dissipation plate, primary heat dissipation holes are formed in the primary heat dissipation plate, and the primary heat dissipation holes output heat inside the shell to the outside; the second grade radiator unit includes the second grade fixed plate, second grade movable plate and deformation piece are located the inboard of second grade fixed plate, the one end of deformation piece and the interior wall connection of shell, the other end and the second grade movable plate of deformation piece are connected, be provided with on the second grade movable plate and connect the through-hole, be provided with the second grade louvre on the second grade fixed plate, the deformation piece removes in one side of second grade fixed plate through expend with heat and contract with cold with the drive second grade movable plate, the second grade louvre of second grade fixed plate can be put through to the switch-on hole of second grade movable plate to the switch-on is external and inside the shell. The switch cabinet of this application adopts foretell heat dissipation box, realizes multiple heat dissipation and dustproof function through multistage radiator unit.
Description
Technical Field
The invention belongs to the technical field of electrical heat dissipation equipment, and particularly relates to a heat dissipation box body and a switch cabinet.
Background
The switch cabinet is an electrical device, numerous electrical components are arranged inside the switch cabinet, the electrical components can release a large amount of heat in the working process, if the heat cannot be discharged out of the switch cabinet, the internal temperature of the switch cabinet rises, the electrical components are overheated, and faults occur.
Disclosure of Invention
The invention aims to provide a heat dissipation box body which can realize better dustproof protection on the premise of ensuring heat dissipation efficiency.
The invention also aims to provide a switch cabinet, and the switch cabinet can realize better dustproof protection by adopting the heat dissipation box body on the premise of ensuring the heat dissipation efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat dissipation case, comprising:
a case for accommodating the heat generating device;
the primary heat dissipation assembly is arranged on the shell and comprises a primary heat dissipation plate, primary heat dissipation holes are formed in the primary heat dissipation plate, and the primary heat dissipation holes output heat inside the shell to the outside;
second grade radiator unit, install in the shell, second grade radiator unit includes second grade fixed plate, second grade movable plate and deformation are located the inboard of second grade fixed plate, the one end of deformation with the interior wall connection of shell, the other end of deformation with the second grade movable plate is connected, be provided with on the second grade movable plate and connect the through-hole, be provided with the second grade louvre on the second grade fixed plate, the deformation passes through expend with heat and contract with the drive the second grade movable plate is in one side of second grade fixed plate removes, the second grade movable plate connect the through-hole can switch on the second grade fixed plate the second grade louvre to the switch on external with inside the shell.
As a preferable technical solution, an opening and closing member is disposed in the first-stage heat dissipation hole, the opening and closing member is made of a shape memory alloy material, one end of the opening and closing member is fixed to a side wall of the first-stage heat dissipation hole, the other end of the opening and closing member is a free end, and the opening and closing member is heated and straightened to open the first-stage heat dissipation hole or cooled and rolled to close the first-stage heat dissipation hole.
As a preferred technical solution, the primary heat dissipation assembly further includes a first fan, the first fan is located at one side of the primary heat dissipation plate, and the first fan accelerates air to pass through the primary heat dissipation hole and output the accelerated air to the outside.
As a preferred technical scheme, still include tertiary radiating component, tertiary radiating component includes tertiary fixed plate, tertiary movable plate and first driving piece, the air intake has been seted up on the tertiary fixed plate, first driving piece set up in tertiary fixed plate, the power take off end of first driving piece with tertiary movable plate is connected, first driving piece can drive tertiary movable plate is in order to open or close the air intake.
As a preferred technical scheme, the three-level fixed plate is further provided with a first sliding groove, the three-level moving plate is located in the first sliding groove, the three-level moving plate comprises a sealing end and a ventilation end, the sealing end is used for closing the air inlet, and the ventilation end is used for communicating the air inlet.
As a preferred technical scheme, a baffle is arranged on the ventilation end, and the baffle can prevent impurities from directly entering the interior of the box body.
As a preferred technical scheme, the heat dissipation device further comprises a four-stage heat dissipation assembly, wherein the four-stage heat dissipation assembly comprises a four-stage fixed plate, a four-stage moving plate and a second driving piece, the four-stage fixed plate is provided with an air outlet and a second sliding groove, and the four-stage moving plate is located in the second sliding groove;
the second driving piece is arranged on the four-stage fixed plate, the power output end of the second driving piece is connected with the four-stage movable plate, and the second driving piece can drive the four-stage movable plate to open or close the air outlet.
As a preferred technical solution, the four-stage heat dissipation assembly further includes a second fan, the second fan is disposed on the housing, and the second fan is configured to discharge air to the outside through the air outlet.
The utility model provides a switch cabinet, switch cabinet includes as above-mentioned heat dissipation box, switch cabinet still includes temperature detection spare, temperature detection spare is used for detecting the inside temperature of box.
The invention has the beneficial effects that: the first-stage radiating assembly comprises a first-stage radiating plate, first-stage radiating holes are formed in the first-stage radiating plate, heat inside the shell is output to the outside through the first-stage radiating holes, opening and closing parts which expand with heat and contract with cold are arranged on the first-stage radiating holes, the opening and closing parts can automatically open the first-stage radiating holes when the temperature inside the shell is too high, extra power is not needed to drive the first-stage radiating holes, and energy consumption is saved; the second grade radiator unit includes second grade fixed plate, second grade movable plate and the piece that warp are located the inboard of second grade fixed plate, the one end of the piece that warp with the interior wall connection of shell, the other end of the piece that warp with the second grade movable plate is connected, be provided with on the second grade movable plate and connect the through-hole, be provided with the second grade louvre on the second grade fixed plate, work as when the inside temperature of shell further improves, the piece that warp is heated and is out of shape the drive the second grade movable plate is in one side of second grade fixed plate removes, connect the through-hole and can put through the second grade louvre to improve radiating efficiency. The opening and closing piece is opened when the internal temperature of the shell reaches a first preset temperature, and the deformation piece can connect the through hole with the secondary heat dissipation hole when the internal temperature of the shell reaches a second preset temperature, so that the dustproof protection is realized on the premise of effective heat dissipation.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
Fig. 1 is a top view of a heat dissipation case according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the portion A shown in FIG. 1;
FIG. 3 is a top view of a tertiary heat dissipation assembly (with the air inlet in a closed position) according to an embodiment of the present invention;
FIG. 4 is another top view of a tertiary heat dissipation assembly (with the air inlet in an open position) according to an embodiment of the present invention;
fig. 5 is a top view of a four-stage heat dissipation assembly according to an embodiment of the present invention (with an air outlet in a closed state);
fig. 6 is another top view of the four-stage heat dissipation assembly according to the embodiment of the present invention (with the air outlet in an open state);
in fig. 1 to 6:
1. a primary heat dissipation assembly; 11. a first-stage heat dissipation plate; 111. a first-level heat dissipation hole; 12. an opening and closing member; 13. a first fan;
2. a secondary heat dissipation assembly; 21. a secondary fixing plate; 211. secondary heat dissipation holes; 22. moving the plate in two stages; 221. connecting through holes; 23. a deformation member;
3. a tertiary heat dissipation assembly; 31. a third-stage fixing plate; 311. an air inlet; 312. a first chute; 32. three-stage moving plates; 321. sealing the end; 322. a venting end; 323. a baffle plate; 33. a first driving member;
4. a four-stage heat dissipation assembly; 41. a four-stage fixed plate; 411. an air outlet; 412. a second chute; 42. a four-stage moving plate; 43. a second driving member; 44. a second fan.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The first embodiment is as follows:
a heat dissipation box as shown in fig. 1 to 6 comprises a housing, a primary heat dissipation assembly 1 and a secondary heat dissipation assembly 2; the shell is used for accommodating a heat generating device; the primary heat dissipation assembly 1 is mounted on the housing, the primary heat dissipation assembly 1 comprises a primary heat dissipation plate 11, a primary heat dissipation hole 111 is formed in the primary heat dissipation plate 11, and the primary heat dissipation hole 111 outputs heat inside the housing to the outside; second grade radiator unit 2 install in the shell, second grade radiator unit 2 includes second grade fixed plate 21, second grade movable plate 22 and deformation 23 are located the inboard of second grade fixed plate 21, the one end of deformation 23 with the interior wall connection of shell, the other end that deforms 23 with second grade movable plate 22 connects, be provided with on the second grade movable plate 22 and connect through-hole 221, be provided with second grade louvre 211 on the second grade fixed plate 21, deformation 23 is through expend with heat and contract with the drive second grade movable plate 22 is in one side of second grade fixed plate 21 removes, second grade movable plate 22 connect through-hole 221 can switch on second grade fixed plate 21 second grade louvre 211 to switch on external with inside the shell.
In this embodiment, when the temperature inside the housing is higher than a second preset temperature, the deformation element 23 is deformed by heat to push the secondary moving plate 22 to move on one side of the secondary fixing plate 21, and the through hole 221 can connect the secondary heat dissipation hole 211; when the temperature inside the housing is lower than a second preset temperature, the deformation member 23 recovers the shape and pulls the secondary moving plate 22 to cause the connection hole 221 and the secondary heat dissipation hole 211 to be closed in a staggered manner, so as to prevent external impurities from entering the housing. When the through hole 221 and the secondary heat dissipation hole 211 are completely connected, the other end of the secondary moving plate 22 is defined by the inner wall of the housing, and the through hole 221 and the secondary heat dissipation hole 211 are provided in plurality.
In this embodiment, an opening/closing member 12 is disposed in the first-stage heat dissipation hole 111, the opening/closing member 12 is made of a shape memory alloy material, one end of the opening/closing member 12 is fixed to a sidewall of the first-stage heat dissipation hole 111, and the other end of the opening/closing member 12 is a free end, and the opening/closing member 12 is straightened by being heated to open the first-stage heat dissipation hole 111 or is rolled to close the first-stage heat dissipation hole 111 by being cooled. The number of the primary heat dissipation holes 111 is multiple, and the opening and closing piece 12 is arranged in each primary heat dissipation hole 111; when the internal temperature of the housing is higher than a first preset temperature, the opening and closing member 12 is heated and straightened to open the first-stage heat dissipation hole 111; when the temperature inside the housing is lower than a first preset temperature, the opening and closing member 12 recovers the shape to close the first-stage heat dissipation hole 111, thereby preventing external impurities from being input into the housing.
Specifically, since the temperature inside the housing is a gradual process, the shape change of the deformation member 23 and the opening and closing member 12 is also gradual.
In this embodiment, the primary heat sink assembly 1 further includes a first fan 13, the first fan 13 is located at one side of the primary heat sink 11, and the first fan 13 can accelerate the air to pass through the primary heat sink 111 and output the air to the outside.
In this embodiment, the heat dissipation device further includes a third-level heat dissipation assembly 3, the third-level heat dissipation assembly 3 includes a third-level fixing plate 31, a third-level moving plate 32 and a first driving member 33, an air inlet 311 is formed in the third-level fixing plate 31, the first driving member 33 is disposed in the third-level fixing plate 31, a power output end of the first driving member 33 is connected to the third-level moving plate 32, and the first driving member 33 can drive the third-level moving plate 32 to open or close the air inlet 311. When the temperature inside the housing is higher than the third preset temperature, the first driving member 33 can drive the third-level moving plate 32 to open the air inlet 311, so that the air inlet speed is increased.
In this embodiment, the third-stage fixing plate 31 is further provided with a first sliding slot 312, the third-stage moving plate 32 is located in the first sliding slot 312, the third-stage moving plate 32 includes a sealing end 321 and a ventilation end 322, the sealing end 321 is used for closing the air inlet 311, and the ventilation end 322 is used for connecting the air inlet 311.
In this embodiment, a baffle 323 is disposed on the ventilation end 322, and the baffle 323 can prevent impurities from directly entering the interior of the box body.
Specifically, through the arrangement of the end cap 321, the ventilation end 322 and the baffle 323, the gas can enter the inside of the shell, and meanwhile, the light is prevented from directly irradiating the inside of the shell, so that the influence on the operation of the inside equipment is avoided.
In this embodiment, the four-stage heat dissipation assembly 4 is further included, the four-stage heat dissipation assembly 4 includes a four-stage fixing plate 41, a four-stage moving plate 42 and a second driving element 43, the four-stage fixing plate 41 is provided with an air outlet 411 and a second sliding slot 412, and the four-stage moving plate 42 is located in the second sliding slot 412; the second driving element 43 is disposed on the fourth-stage fixing plate 41, a power output end of the second driving element 43 is connected to the fourth-stage moving plate 42, and the second driving element 43 can drive the fourth-stage moving plate 42 to open or close the air outlet 411.
In this embodiment, the four-stage heat dissipation assembly 4 further includes a second fan 44, the second fan 44 is disposed on the housing, and the second fan 44 is configured to discharge air to the outside through the air outlet 411.
The utility model provides a switch cabinet, includes as above-mentioned heat dissipation box, switch cabinet still includes temperature detection spare, temperature detection spare is used for detecting the inside temperature of box.
The second preset temperature is greater than the first preset temperature, and the third preset temperature is greater than the second preset temperature.
When the temperature inside the shell is higher than a first preset temperature, the first fan 13 starts blowing air; when the temperature inside the shell is higher than a second preset temperature, the connecting through hole 221 is communicated with the secondary heat dissipation hole 211, and the air inlet speed at the moment can meet the heat dissipation requirement; when the temperature inside the housing is higher than the third preset temperature, the first driving member 33 drives the third-stage moving plate 32 to open the air inlet 311, so as to increase the air inlet speed, the second driving member 43 drives the fourth-stage moving plate 42 to open the air outlet 411, and the second fan 44 discharges air to the outside through the air outlet 411, so as to increase the heat dissipation efficiency.
Specifically, connect through-hole 221, second grade louvre 211, air intake 311 and air outlet 411 in all be provided with the filter screen, the filter screen is used for avoiding impurity to get into inside the shell.
The opening and closing member 12 is opened when the internal temperature of the housing reaches a first preset temperature, and the deformation member 23 is configured to connect the through hole 221 to the secondary heat dissipation hole 211 when the internal temperature of the housing reaches a second preset temperature, so as to ensure that the dust protection is realized on the premise of effective heat dissipation.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (6)
1. The utility model provides a heat dissipation box which characterized in that includes:
a case for accommodating the heat generating device;
the primary heat dissipation assembly is arranged on the shell and comprises a primary heat dissipation plate, primary heat dissipation holes are formed in the primary heat dissipation plate, and the primary heat dissipation holes output heat inside the shell to the outside;
the secondary heat dissipation assembly is mounted on the shell and comprises a secondary fixed plate, a secondary movable plate and a deformation piece, the secondary movable plate and the deformation piece are located on the inner side of the secondary fixed plate, one end of the deformation piece is connected with the inner wall of the shell, the other end of the deformation piece is connected with the secondary movable plate, a connecting through hole is formed in the secondary movable plate, a secondary heat dissipation hole is formed in the secondary fixed plate, the deformation piece drives the secondary movable plate to move on one side of the secondary fixed plate through expansion and contraction, and the connecting through hole of the secondary movable plate can be communicated with the secondary heat dissipation hole of the secondary fixed plate so as to be communicated with the outside and the inside of the shell;
the three-level heat dissipation assembly comprises a three-level fixed plate, a three-level moving plate and a first driving piece, an air inlet is formed in the three-level fixed plate, the first driving piece is arranged on the three-level fixed plate, the power output end of the first driving piece is connected with the three-level moving plate, and the first driving piece can drive the three-level moving plate to open or close the air inlet;
the three-level fixed plate is further provided with a first sliding groove, the three-level moving plate is located in the first sliding groove, the three-level moving plate comprises a sealing end and a ventilation end, the sealing end is used for closing the air inlet, and the ventilation end is used for communicating with the air inlet;
the ventilation end is provided with a baffle plate, and the baffle plate can prevent impurities from directly entering the interior of the box body.
2. The heat dissipating box of claim 1, wherein the first-stage heat dissipating holes are provided with an opening/closing member, the opening/closing member is made of shape memory alloy, one end of the opening/closing member is fixed to a sidewall of the first-stage heat dissipating holes, the other end of the opening/closing member is a free end, and the opening/closing member is straightened by heating to open the first-stage heat dissipating holes or rolled by cooling to close the first-stage heat dissipating holes.
3. The heat dissipating box of claim 1, wherein the primary heat dissipating assembly further comprises a first fan, the first fan is disposed at one side of the primary heat dissipating plate, and the first fan accelerates the air to pass through the primary heat dissipating hole and output to the outside.
4. The heat dissipation box body of claim 1, further comprising a fourth-stage heat dissipation assembly, wherein the fourth-stage heat dissipation assembly comprises a fourth-stage fixed plate, a fourth-stage moving plate and a second driving member, the fourth-stage fixed plate is provided with an air outlet and a second sliding groove, and the fourth-stage moving plate is located in the second sliding groove;
the second driving piece is arranged on the four-stage fixed plate, the power output end of the second driving piece is connected with the four-stage movable plate, and the second driving piece can drive the four-stage movable plate to open or close the air outlet.
5. The heat dissipating box body of claim 4, wherein the four-stage heat dissipating assembly further comprises a second fan disposed on the housing, the second fan being configured to discharge air to the outside through the air outlet.
6. A switchgear cabinet, characterized in that it comprises a heat-dissipating cabinet according to claims 1 to 5, and a temperature detector for detecting the temperature inside the cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010366558.7A CN111525418B (en) | 2020-04-30 | 2020-04-30 | Heat dissipation box and cubical switchboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010366558.7A CN111525418B (en) | 2020-04-30 | 2020-04-30 | Heat dissipation box and cubical switchboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111525418A CN111525418A (en) | 2020-08-11 |
| CN111525418B true CN111525418B (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010366558.7A Active CN111525418B (en) | 2020-04-30 | 2020-04-30 | Heat dissipation box and cubical switchboard |
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| CN (1) | CN111525418B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112272461B (en) * | 2020-09-21 | 2022-03-01 | 深圳市英辉源电子有限公司 | Self-heat-dissipation power adapter |
| CN112261850B (en) * | 2020-11-04 | 2023-03-28 | 马鞍山佳夫尼电气科技有限公司 | SVG room heat abstractor of booster station |
| CN113301756B (en) * | 2021-06-07 | 2022-11-01 | 国网黑龙江省电力有限公司供电服务中心 | High and cold area electric energy meter data acquisition signal intensifier |
| CN113328364B (en) * | 2021-06-17 | 2022-04-19 | 湖北国电众恒电气有限公司 | Power distribution cabinet convenient for heat dissipation |
| CN114375121B (en) * | 2022-01-24 | 2024-10-11 | 高创(苏州)电子有限公司 | Box body and electronic equipment |
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| CN210381712U (en) * | 2019-06-04 | 2020-04-21 | 甘肃东兴铝业有限公司 | Outdoor dustproof heat dissipation switch board of transformer substation |
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| CN111525418A (en) | 2020-08-11 |
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