CN110571659A - Heat dissipation switch board with oxygen extraction fire prevention function - Google Patents

Heat dissipation switch board with oxygen extraction fire prevention function Download PDF

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Publication number
CN110571659A
CN110571659A CN201910767196.XA CN201910767196A CN110571659A CN 110571659 A CN110571659 A CN 110571659A CN 201910767196 A CN201910767196 A CN 201910767196A CN 110571659 A CN110571659 A CN 110571659A
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CN
China
Prior art keywords
power distribution
distribution cabinet
fire
oxygen
switch board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910767196.XA
Other languages
Chinese (zh)
Inventor
李新国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Guofeng Power Equipment Co Ltd
Original Assignee
Hunan Guofeng Power Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Guofeng Power Equipment Co Ltd filed Critical Hunan Guofeng Power Equipment Co Ltd
Priority to CN201910767196.XA priority Critical patent/CN110571659A/en
Publication of CN110571659A publication Critical patent/CN110571659A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C3/00Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • 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
    • H02B1/28Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Patch Boards (AREA)

Abstract

The invention provides a heat-dissipation power distribution cabinet with an oxygen-discharging and fire-preventing function, and relates to the technical field of power distribution cabinets. According to the invention, through the arrangement of the negative pressure fan and the ventilation hole, gas in the power distribution cabinet body is discharged by the negative pressure fan in fire, including oxygen, and through the arrangement of the oxygen discharge fire extinguishing device, a large amount of carbon dioxide can be generated.

Description

Heat dissipation switch board with oxygen extraction fire prevention function
Technical Field
the invention relates to the technical field of power distribution cabinets, in particular to a heat dissipation power distribution cabinet with an oxygen-discharging and fire-preventing function.
Background
The switch board is the biggest branch of quick-witted case rack, and the function of switch board is different from the function of quick-witted case rack, has self nature and function, and the use of switch board is the same with the frequency of use of quick-witted case rack, the best selection of our needs of switch board: the low-voltage distribution cabinet, the control system and the complete equipment also have new development trends along with the development and the application of field bus technology, including new technical characteristics of compactness, intellectualization, communication, high protection, high reliability, modularization, environmental protection and the like.
The switch board is the important device among the electric power system, be distribution system's final stage equipment, the switch board is used widely in each trade, but current switch board often produces the heat in the use, then produce the conflagration easily when the heat is too big, especially summer, summer is originally just hot dry, and be the season that the power consumption is the most in one year, the conflagration takes place most easily, when the conflagration takes place, if the staff can not arrive the scene in time, probably can cause major fire accident, people's life safety also can receive the threat, and can cause the extravagant environmental pollution of resource.
disclosure of Invention
The invention aims to provide a heat-dissipation power distribution cabinet with an oxygen-discharging and fire-preventing function so as to solve the technical problem.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a heat dissipation switch board with fire prevention function of oxygen extraction, includes the switch board body, its characterized in that:
The upper end of the power distribution cabinet body is rotatably provided with a power distribution cabinet door, a transparent window is arranged on the power distribution cabinet door, the top of the upper end of the power distribution cabinet door is provided with a ventilation hole in a penetrating way, a negative pressure fan is arranged in the ventilation hole, the lower port of the ventilation hole is provided with a filter screen, a top cover is arranged on the power distribution cabinet body above the ventilation hole, the inner side wall of the power distribution cabinet body is provided with a fire sensing device, the fire sensing device comprises a temperature sensor, a smoke sensor is arranged below the temperature sensor, a control circuit board is arranged below the smoke sensor, the negative pressure fan, the temperature sensor and the smoke sensor are electrically connected with the control circuit board, the lower end in the power distribution cabinet body is provided with an oxygen-discharging fire-extinguishing device, the oxygen-discharging fire-extinguishing device comprises a, the control panel and fire sensing device electric connection, the exit of fire extinguisher is provided with the solenoid valve. Negative-pressure air fan and ventilation hole's setting, can feel when the condition of a fire at conflagration induction system, negative-pressure air fan is with the inside gas outgoing of switch board body, including oxygen, simultaneously through the setting of row's oxygen extinguishing device, can produce a large amount of carbon dioxide, and carbon dioxide can be all extruded the inside oxygen of switch board body for the burning can not continue, plays fine fire control effect, and the setting of solenoid valve and control panel need not manual operation, and the fire extinguisher very first time is according to the intensity of a fire reaction.
Preferably, the fire extinguisher is a carbon dioxide fire extinguisher.
Preferably, the export of fire extinguisher leads to the inside of switch board body, and fire extinguisher public is provided with two.
Preferably, the control board is electrically connected with an external power supply, and the electromagnetic valve is electrically connected with the control board.
preferably, the switch board body have and be provided with the ventilation cooling seam on the lateral wall, the top edge of ventilation cooling seam is provided with the axis of rotation, and fixed mounting has the closing plate in the axis of rotation, and the left and right sides of closing plate rotates and is provided with hydraulic telescoping rod, and hydraulic telescoping rod's one end movable mounting is in the both sides of ventilation cooling seam, and the inboard edge of closing plate is provided with joint strip, be provided with the telescopic link controller on the inner wall of switch board body, conflagration induction system is connected with the telescopic link controller electricity. Through the setting of ventilation and heat dissipation seam, can be at the inside equipment studio of switch board body, ventilation and heat dissipation through closing plate and hydraulic telescoping rod's setting for when the condition of a fire takes place, the closing plate is closed at once, prevents that external oxygen from entering into inside the switch board, makes the inside complete carbon dioxide's of switch board environment.
Preferably, the sealing plate is equal to the size of the ventilation and heat dissipation slot.
Preferably, the vertical edge of switch board body and switch board chamber door is provided with the hasp, and the lower extreme four corners of switch board body is provided with the universal wheel.
the invention has the beneficial effects that:
According to the invention, through the arrangement of the negative pressure fan and the ventilation hole, when a fire sensing device senses a fire, the negative pressure fan can discharge gas in the power distribution cabinet body, including oxygen, and simultaneously through the arrangement of the oxygen-discharging fire extinguishing device, a large amount of carbon dioxide can be generated, the carbon dioxide can completely extrude the oxygen in the power distribution cabinet body, so that the combustion can not be continued, and a good fire extinguishing effect is achieved, the arrangement of the electromagnetic valve and the control panel does not need manual operation, the fire extinguisher can react according to the fire at the first time, through the arrangement of the ventilation and heat dissipation seam, the ventilation and heat dissipation can be carried out in an equipment working chamber in the power distribution cabinet body, and through the arrangement of the sealing plate and the hydraulic telescopic rod, when the fire happens, the sealing plate is immediately closed, the external oxygen is prevented from entering the power distribution cabinet, need not manual operation, can in time put out the fire after the switch board catches fire to avoid causing bigger conflagration, the practicality is high.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic diagram of the right-view structure of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1 according to the present invention;
FIG. 4 is a block flow diagram of the present invention;
Reference numerals: 1-a power distribution cabinet body; 2-a door of a power distribution cabinet; 3-a transparent window; 4-a ventilation hole; 5-negative pressure fan; 6-top cover; 7-a fire sensing device; 701-a temperature sensor; 702-a smoke sensor; 703-a control circuit board; 8-oxygen discharge fire extinguishing device; 801-storage cabinets; 802-fire extinguisher; 803-control panel; 804-electromagnetic valve; 9-ventilating and heat-dissipating seams; 10-a rotating shaft; 11-a sealing plate; 12-hydraulic telescopic rod; 13-sealing adhesive tape; 14-telescopic rod controller.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.
Specific embodiments of the present invention are described below with reference to the accompanying drawings.
example 1
As shown in figures 1 and 4, a heat-dissipation power distribution cabinet with oxygen-discharging and fire-preventing functions comprises a power distribution cabinet body 1, a power distribution cabinet door 2 is rotatably installed at the upper end of the power distribution cabinet body 1, a transparent window 3 is arranged on the power distribution cabinet door 2, a ventilation hole 4 is arranged at the top of the upper end of the power distribution cabinet door 2 in a penetrating manner, a negative-pressure air blower 5 is installed in the ventilation hole 4, a filter screen is arranged at the lower port of the ventilation hole 4, a top cover 6 is installed on the power distribution cabinet body 1 above the ventilation hole 4, a fire sensing device 7 is arranged on the inner side wall of the power distribution cabinet body 1, the fire sensing device 7 comprises a temperature sensor 701, a smoke sensor 702 is arranged below the temperature sensor 701, a control circuit board 703 is arranged below the smoke sensor 702, the negative-pressure air blower 5, the temperature sensor 701 and the smoke sensor 702, the oxygen-discharging fire-extinguishing device 8 comprises a storage cabinet 801, a fire extinguisher 802 is arranged in the storage cabinet 801, a control panel 803 is arranged on one side of the fire extinguisher 802, the control panel 803 is electrically connected with the fire sensing device 7, and an electromagnetic valve 804 is arranged at the outlet of the fire extinguisher 802.
Installing all electrical equipment into the power distribution cabinet body 1, then fixing the door 2 of the power distribution cabinet on the power distribution cabinet body 1, observing the electrical equipment in the power distribution cabinet body 1 through the transparent window 3, when the electrical equipment is in failure or even in fire, the temperature sensor 701 and the smoke sensor 702 sense fire information at the first time, the control circuit board 703 controls the negative pressure fan 5 to start working, so that the power distribution cabinet body 1 can rapidly form a negative pressure environment, the quantity of combustible gas such as oxygen is reduced, the fire can be effectively controlled, meanwhile, the control circuit board 703 is connected with the control board 803, the control board 803 controls the electromagnetic valve 804, make solenoid valve 804 open, fire extinguisher 802 is towards the inside a large amount of carbon dioxide of spouting of switch board body 1, and the weight ratio oxygen of carbon dioxide is big, so oxygen also can be pushed out switch board body 1 inside, accomplishes the overall process that the oxygen of row was put out a fire.
Example 2
As shown in figures 1 and 4, a heat-dissipation power distribution cabinet with oxygen-discharging and fire-preventing functions comprises a power distribution cabinet body 1, a power distribution cabinet door 2 is rotatably installed at the upper end of the power distribution cabinet body 1, a transparent window 3 is arranged on the power distribution cabinet door 2, a ventilation hole 4 is arranged at the top of the upper end of the power distribution cabinet door 2 in a penetrating manner, a negative-pressure air blower 5 is installed in the ventilation hole 4, a filter screen is arranged at the lower port of the ventilation hole 4, a top cover 6 is installed on the power distribution cabinet body 1 above the ventilation hole 4, a fire sensing device 7 is arranged on the inner side wall of the power distribution cabinet body 1, the fire sensing device 7 comprises a temperature sensor 701, a smoke sensor 702 is arranged below the temperature sensor 701, a control circuit board 703 is arranged below the smoke sensor 702, the negative-pressure air blower 5, the temperature sensor 701 and the smoke sensor 702, the oxygen-discharging fire-extinguishing device 8 comprises a storage cabinet 801, a fire extinguisher 802 is arranged in the storage cabinet 801, a control panel 803 is arranged on one side of the fire extinguisher 802, the control panel 803 is electrically connected with the fire sensing device 7, and an electromagnetic valve 804 is arranged at the outlet of the fire extinguisher 802.
Switch board body 1 have and be provided with ventilation cooling seam 9 on the lateral wall, ventilation cooling seam 9's top edge is provided with axis of rotation 10, fixed mounting has closing plate 11 in the axis of rotation 10, closing plate 11's the left and right sides rotates and is provided with hydraulic telescoping rod 12, hydraulic telescoping rod 12's one end movable mounting is in ventilation cooling seam 9's both sides, closing plate 11's inboard edge is provided with joint strip 13, be provided with telescopic link controller 14 on switch board body 1's the inner wall, conflagration induction system 7 is connected with telescopic link controller 14 electricity.
The setting of heat dissipation seam 9 can be at the inside equipment of switch board body 1 at the during operation, ventilation cooling, through the setting of closing plate 11 and hydraulic telescoping rod 12 for when the condition of a fire takes place, 14 control hydraulic telescoping rod 12 contractions of telescopic link controller, hydraulic telescoping rod 12 drives closing plate 11 and rotates and close, prevents that external oxygen from entering into inside the switch board, makes the inside complete carbon dioxide's of switch board environment.
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 foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a heat dissipation switch board with fire prevention function of oxygen extraction, includes switch board body (1), its characterized in that:
The fire disaster sensing device is characterized in that a power distribution cabinet door (2) is rotatably installed at the upper end of a power distribution cabinet body (1), a transparent window (3) is arranged on the power distribution cabinet door (2), a ventilation hole (4) is formed in the top of the upper end of the power distribution cabinet door (2) in a penetrating mode, a negative pressure fan (5) is installed in the ventilation hole (4), a filter screen is arranged at the lower port of the ventilation hole (4), a top cover (6) is installed on the power distribution cabinet body (1) above the ventilation hole (4), a fire disaster sensing device (7) is arranged on the inner side wall of the power distribution cabinet body (1), the fire disaster sensing device (7) comprises a temperature sensor (701), a smoke sensor (702) is arranged below the temperature sensor (701), a control circuit board (703) is arranged below the smoke sensor (702), and the negative pressure fan (5), the temperature sensor (701) and the smoke sensor (, the utility model discloses a fire extinguishing device, including switch board body (1), the inside lower extreme of switch board body (1) is provided with oxygen discharge extinguishing device (8), and oxygen discharge extinguishing device (8) are provided with fire extinguisher (802) including storing cabinet (801), the inside of storing cabinet (801), and one side of fire extinguisher (802) is provided with control panel (803), control panel (803) and conflagration induction system (7) electric connection, the exit of fire extinguisher (802) is provided with solenoid valve (804).
2. the heat-dissipation power distribution cabinet with the oxygen-discharging and fire-proof functions as claimed in claim 1, wherein: the fire extinguisher (18) adopts a carbon dioxide fire extinguisher.
3. The heat-dissipation power distribution cabinet with the oxygen-discharging and fire-proof functions as claimed in claim 1, wherein: the outlet of the fire extinguisher (802) leads to the inside of the power distribution cabinet body (1), and two fire extinguishers (802) are arranged.
4. The heat-dissipation power distribution cabinet with the oxygen-discharging and fire-proof functions as claimed in claim 1, wherein: the control board (803) is electrically connected with an external power supply, and the electromagnetic valve (804) is electrically connected with the control board (803).
5. The heat-dissipation power distribution cabinet with the oxygen-discharging and fire-proof functions as claimed in claim 1, wherein: the fire disaster sensing device is characterized in that a ventilation and heat dissipation seam (9) is arranged on the side wall of the power distribution cabinet body (1), a rotating shaft (10) is arranged at the upper edge of the ventilation and heat dissipation seam (9), a sealing plate (11) is fixedly mounted on the rotating shaft (10), hydraulic telescopic rods (12) are rotatably arranged on the left side and the right side of the sealing plate (11), one ends of the hydraulic telescopic rods (12) are movably mounted on two sides of the ventilation and heat dissipation seam (9), sealing rubber strips (13) are arranged on the inner side edge of the sealing plate (11), a telescopic rod controller (14) is arranged on the inner wall of the power distribution cabinet body (1), and the fire disaster sensing device (.
6. The heat-dissipation power distribution cabinet with the oxygen-discharging and fire-proof functions as claimed in claim 5, wherein: the sealing plate (11) is equal to the size of the ventilation and heat dissipation slot (9).
7. The heat-dissipation power distribution cabinet with the oxygen-discharging and fire-proof functions as claimed in claim 1, wherein: the power distribution cabinet is characterized in that lock catches are arranged at the vertical edges of the power distribution cabinet body (1) and the power distribution cabinet door (2), and universal wheels are arranged at the four corners of the lower end of the power distribution cabinet body (1).
CN201910767196.XA 2019-08-20 2019-08-20 Heat dissipation switch board with oxygen extraction fire prevention function Pending CN110571659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910767196.XA CN110571659A (en) 2019-08-20 2019-08-20 Heat dissipation switch board with oxygen extraction fire prevention function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910767196.XA CN110571659A (en) 2019-08-20 2019-08-20 Heat dissipation switch board with oxygen extraction fire prevention function

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Publication Number Publication Date
CN110571659A true CN110571659A (en) 2019-12-13

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110932110A (en) * 2019-12-30 2020-03-27 深圳市广智达电气有限公司 Power cabinet convenient to remote monitoring
CN111211500A (en) * 2020-03-10 2020-05-29 柴宣何 Electrical cabinet with smoke sensing cooling and dehumidifying device
CN112316329A (en) * 2020-09-24 2021-02-05 刘喜 Power equipment with fire extinguishing function
CN112531541A (en) * 2020-11-26 2021-03-19 国网浙江省电力有限公司湖州供电公司 Protection device and protection method for transformer substation monitoring equipment
CN112652964A (en) * 2020-12-14 2021-04-13 苏勇 Modularization fire prevention switch board
CN112702864A (en) * 2020-12-29 2021-04-23 王周文磊 Self-sealing heat dissipation hole type fireproof electrical cabinet capable of reducing internal oxygen content
CN112886412A (en) * 2020-12-28 2021-06-01 西安航空学院 Early warning type industrial electric control cabinet
CN113363826A (en) * 2021-08-09 2021-09-07 江苏宝祥电力设备有限公司 Control cabinet with high safety and use method thereof
CN113629509A (en) * 2021-10-12 2021-11-09 南通华为电力设备有限公司 Outdoor prefabricated box-type substation with breathable and moisture-proof effects
CN115962144A (en) * 2022-12-06 2023-04-14 南京和本机电设备科技有限公司 Structure for sealing fan
CN116878674A (en) * 2023-09-05 2023-10-13 山东济钢众电智能科技有限公司 Power distribution cabinet temperature measurement alarm system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205543912U (en) * 2016-03-01 2016-08-31 陈昊 Box -type substation with automatic fire extinguishing function

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205543912U (en) * 2016-03-01 2016-08-31 陈昊 Box -type substation with automatic fire extinguishing function

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110932110A (en) * 2019-12-30 2020-03-27 深圳市广智达电气有限公司 Power cabinet convenient to remote monitoring
CN111211500A (en) * 2020-03-10 2020-05-29 柴宣何 Electrical cabinet with smoke sensing cooling and dehumidifying device
CN112316329B (en) * 2020-09-24 2022-12-27 刘喜 Power equipment with fire extinguishing function
CN112316329A (en) * 2020-09-24 2021-02-05 刘喜 Power equipment with fire extinguishing function
CN112531541A (en) * 2020-11-26 2021-03-19 国网浙江省电力有限公司湖州供电公司 Protection device and protection method for transformer substation monitoring equipment
CN112652964A (en) * 2020-12-14 2021-04-13 苏勇 Modularization fire prevention switch board
CN112652964B (en) * 2020-12-14 2022-06-17 重庆华美电力设备有限责任公司 Modularization fire prevention switch board
CN112886412A (en) * 2020-12-28 2021-06-01 西安航空学院 Early warning type industrial electric control cabinet
CN112702864B (en) * 2020-12-29 2022-01-18 山东瑞科成套电气有限公司 Self-sealing heat dissipation hole type fireproof electrical cabinet capable of reducing internal oxygen content
CN112702864A (en) * 2020-12-29 2021-04-23 王周文磊 Self-sealing heat dissipation hole type fireproof electrical cabinet capable of reducing internal oxygen content
CN113363826A (en) * 2021-08-09 2021-09-07 江苏宝祥电力设备有限公司 Control cabinet with high safety and use method thereof
CN113363826B (en) * 2021-08-09 2021-11-12 江苏宝祥电力设备有限公司 Control cabinet with high safety and use method thereof
CN113629509A (en) * 2021-10-12 2021-11-09 南通华为电力设备有限公司 Outdoor prefabricated box-type substation with breathable and moisture-proof effects
CN115962144A (en) * 2022-12-06 2023-04-14 南京和本机电设备科技有限公司 Structure for sealing fan
CN115962144B (en) * 2022-12-06 2023-10-17 南京和本机电设备科技有限公司 Structure for sealing fan
CN116878674A (en) * 2023-09-05 2023-10-13 山东济钢众电智能科技有限公司 Power distribution cabinet temperature measurement alarm system

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Application publication date: 20191213