Totally-closed transformer heat dissipation structure

Abstract

The invention discloses a fully-closed transformer heat dissipation structure applied to the field of transformers. The fully-closed transformer heat dissipation structure comprises a transformer shell, an iron core, a heat dissipation fin set, an active heat dissipation assembly, a heat dissipation fan set, a circulating pump and a coordination pipe. A radiating fin group matched with the iron core is mounted on the outer wall of the transformer shell; a radiating fan group and a circulating pump are arranged at the bottom end of the fin group; the active heat dissipation assembly comprises a main heat exchange box, an auxiliary heat dissipation box and a connecting guide pipe, the main heat exchange box is embedded into the shell, and the guide pipe penetrates through the fin set to achieve heat exchange; the adjacent assemblies are connected through a coordination pipe to achieve heat sharing, by monitoring temperature data of each main heat exchange box in real time, a conventional heat dissipation mode, a single-assembly active heat dissipation mode or a multi-assembly cooperative heat dissipation mode is automatically switched, it is ensured that heat dissipation is conducted in an optimal mode under different working conditions, self-adaptive multi-layer heat dissipation and intelligent management and control are achieved, and the heat dissipation efficiency is improved. The problems that a traditional totally-closed transformer is low in heat dissipation efficiency, high in energy consumption and uneven in temperature distribution are solved, and the operation safety and reliability of equipment are improved.

Description

A fully enclosed transformer heat dissipation structure Technical Field

[0001] This invention relates to the field of transformers, and in particular to a fully enclosed transformer heat dissipation structure. Background Technology

[0002] Fully enclosed transformers are widely used in power systems, industrial sectors, and urban power grids due to their advantages such as dustproofing, moisture-proofing, and protection against small animal intrusion. However, their enclosed structure makes it difficult for the heat generated by the internal core and windings to be effectively dissipated through natural convection. Especially during high-load operation, excessive temperature rise can accelerate the aging of insulation materials, shorten equipment life, and even cause safety hazards.

[0003] Chinese invention CN108766717B discloses a transformer heat dissipation housing. In this invention, part of the heat generated by the transformer during operation is dissipated through a second copper plate fixedly connected to the transformer. The upper part of the second copper plate is provided with a second heat dissipation aluminum fin, and the upper part of the second heat dissipation aluminum fin passes through the upper shell of the main housing, so that the upper part of the main housing is located outside the main housing, which improves the heat dissipation effect. In addition, the main housing of this invention is fully enclosed to prevent dust from entering the main housing and to prevent short circuits caused by dust entering the main housing.

[0004] Chinese invention CN118969448B discloses a transformer for safe heat dissipation. This invention draws water from the tank and inputs it into the ring pipe at low pressure by activating the sprinkler assembly, causing the water to flow downwards along the outside of the circulating hollow column. This not only washes the outer surface of the circulating hollow column and improves the heat dissipation effect, but also makes full use of the water volume.

[0005] Existing fully enclosed transformers, due to their enclosed structure, are prone to heat dissipation from the internal core and windings through ineffective natural convection. This leads to excessive temperature rise, especially during high-load operation, which can accelerate insulation material aging, shorten equipment lifespan, and even cause safety hazards. Furthermore, current heat dissipation technologies suffer from limited cooling modes and a lack of intelligent control mechanisms, resulting in a difficulty in balancing heat dissipation effectiveness with energy consumption. Summary of the Invention

[0006] The core of this invention lies in solving the problems of low heat dissipation efficiency, high energy consumption, and uneven temperature distribution in existing technologies through an adaptive multi-level heat dissipation mode and intelligent, refined management. Simultaneously, it improves the safety and reliability of equipment operation and reduces energy consumption.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A fully enclosed transformer heat dissipation structure includes a transformer shell with multiple iron cores mounted on it. Multiple pairs of heat dissipation fins matching the iron cores are mounted on the outer wall of the transformer shell. A cooling fan assembly and a circulation pump are mounted at the bottom of each heat dissipation fin assembly. An active heat dissipation component is mounted on the heat dissipation fin assembly, comprising a main heat exchange box and a secondary heat dissipation box installed at both ends of the fin assembly. An upper conduit and a lower conduit connect the main heat exchange box and the secondary heat dissipation box. One end of the main heat exchange box is embedded in the transformer shell. Both the upper and lower conduits penetrate the heat dissipation fin assembly. The circulation pump is connected to the lower conduit and drives the heat exchange fluid in the active heat dissipation component to circulate. The heat exchange fluid exchanges heat with the heat dissipation fin assembly as it flows through the upper and lower conduits. A pair of coordinating pipes connects adjacent active heat dissipation components, and a control valve connects the coordinating pipes to the main heat exchange box. The coordinating pipes control the connection and disconnection of adjacent active heat dissipation components.

[0009] Furthermore, heat exchange fins are installed on the coordinating pipe. The heat exchange fluid supplied from the main heat exchange box to the coordinating pipe is pre-cooled by the heat exchange fins before being fed into another main heat exchange box.

[0010] Furthermore, the lower conduit includes a guide inner tube communicating with the coordination tube, and a heat exchange sleeve communicating with the main heat exchange box is sleeved on the outer end of the guide inner tube. A mixing tube communicating with both the guide inner tube and the heat exchange sleeve is installed at the input end of the circulating pump. The heat exchange liquid output from the coordination tube exchanges heat with the heat exchange liquid from the main heat exchange box to the auxiliary heat exchange box before mixing, thus avoiding direct contact between the heat exchange liquids with high temperature difference.

[0011] Furthermore, the cooling fan assembly includes multiple pairs of axial fans, which are distributed between the main heat exchange box and the auxiliary heat exchange box, and the circulation pump is located in the middle of the cooling fan assembly.

[0012] Furthermore, at least one pair of heat-conducting beams are installed on the heat dissipation fin assembly, and the heat-conducting beams cover the length range of the heat dissipation fin assembly.

[0013] Furthermore, one end of the main heat exchange box is inserted into the transformer housing and equipped with heat exchange plates. The main heat exchange box is sealed to the transformer housing, and a circulating pump is installed between the main heat exchange box and the auxiliary heat exchange box.

[0014] Furthermore, it also includes an auxiliary heat dissipation system, which comprises a data acquisition module, a data processing module, and a control module. The data acquisition module is used to collect temperature data of each iron core inside the transformer housing and the corresponding main heat exchange box of the iron core in real time. The data processing module is used to analyze the temperature data and select the heat dissipation mode according to the preset threshold. The control module is used to execute the instructions of the data processing module to control the speed of the cooling fan group, the start and stop of the circulating pump, the opening and closing of the solenoid valve on the lower duct, and the flow direction switching of the control valve on the coordination pipe.

[0015] Furthermore, the heat dissipation modes include: Normal heat dissipation mode: the temperature at all main heat exchange boxes is below the safety set value, and only the basic speed of the cooling fan group is started; Active heat dissipation mode: the temperature at any main heat exchange box is above the safety set value, the corresponding circulation pump is started and the speed of the cooling fan group is increased; Multi-component coordinated heat dissipation mode: the local temperature is above the set safety threshold and the adjacent active heat dissipation components are not actively dissipating heat, the control valve of the coordination pipe is opened, so that the high-temperature heat exchange fluid flows into the adjacent active heat dissipation components through the coordination pipe for circulation, and the speed of the cooling fan group corresponding to the two active heat dissipation components is further increased.

[0016] Furthermore, if the temperature of the main heat exchanger box exceeds the set safety threshold and the temperatures of its adjacent active heat dissipation components also exceed the safety set value, an alarm will be triggered, and all active heat dissipation components will be set to active heat dissipation mode.

[0017] Compared with the prior art, the advantages of the present invention are: (1) The present invention automatically switches between conventional heat dissipation, single-component active heat dissipation or multi-component collaborative heat dissipation modes by real-time monitoring of the temperature data of each main heat exchange box, so as to ensure that heat dissipation is carried out in the optimal way under different working conditions. Conventional heat dissipation uses natural convection and basic air cooling to balance energy consumption, active heat dissipation disperses local heat through heat exchange fluid circulation, and collaborative heat dissipation realizes heat sharing between adjacent components through coordination pipes, which significantly improves heat dissipation efficiency and balances temperature distribution.

[0018] (2) Through data acquisition, processing and control modules, the whole process is intelligently controlled. It can accurately identify single-point overheating, temperature difference between adjacent components and other states, dynamically adjust the speed of the cooling fan, start and stop of the circulating pump and the opening and closing of the coordination pipe, avoid the rough operation of traditional heat dissipation, reduce energy consumption while ensuring heat dissipation effect, and improve the safety and reliability of equipment operation. Attached Figure Description

[0019] Figure 1 is a perspective view of the present invention; Figure 2 is a top view of the present invention; Figure 3 is a side view of the present invention; Figure 4 is a cross-sectional view of the present invention; Figure 5 is a structural schematic diagram of point A in Figure 4; Figure 6 is a bottom view of the present invention; Figure 7 is a schematic diagram of the connection between the coordination pipe and the main heat exchange box of the present invention; Figure 8 is a schematic diagram of the heat exchange fluid path when the active heat dissipation component of the present invention performs active heat dissipation independently; Figure 9 is a schematic diagram of the heat exchange fluid path when the multi-component collaborative heat dissipation state of the present invention; Figure 10 is a flowchart of the working logic of the present invention.

[0020] The following are the labels in the diagram: 1. Transformer housing; 2. Iron core; 3. Heat dissipation fin assembly; 4. Active heat dissipation assembly; 41. Main heat exchange box; 42. Auxiliary heat exchange box; 43. Upper duct; 44. Lower duct; 441. Inner guide tube; 442. Heat exchange sleeve; 443. Mixing tube; 5. Cooling fan assembly; 6. Circulation pump; 7. Coordination tube. Detailed Implementation

[0021] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0022] First implementation: Please refer to Figures 1-10. A fully enclosed transformer heat dissipation structure includes a transformer housing 1, multiple iron cores 2 are installed on the transformer housing 1, and multiple pairs of heat dissipation fin groups 3 that match the iron cores 2 are installed on the outer wall of the transformer housing 1. A heat dissipation fan group 5 and a circulation pump 6 are installed at the bottom of the heat dissipation fin group 3. The heat dissipation fan group 5 includes multiple pairs of axial flow fans, and the multiple pairs of axial flow fans are distributed between the main heat exchange box 41 and the auxiliary heat dissipation box 42. The circulation pump 6 is located in the middle of the heat dissipation fan group 5.

[0023] An active heat dissipation assembly 4 is installed on the heat dissipation fin assembly 3. The active heat dissipation assembly 4 includes a main heat exchange box 41 and a secondary heat dissipation box 42 installed at both ends of the heat dissipation fin assembly 3. An upper conduit 43 and a lower conduit 44 are connected between the main heat exchange box 41 and the secondary heat dissipation box 42, and both the upper conduit 43 and the lower conduit 44 penetrate the heat dissipation fin assembly 3. One end of the main heat exchange box 41 is inserted into the transformer housing 1 and is equipped with aluminum heat exchange fins. A microchannel flat tube array can be set inside the main heat exchange box 41 to ensure uniform distribution of the heat exchange fluid when flowing in the main heat exchange box 41. The main heat exchange box 41 is sealed to the transformer housing 1. A circulation pump 6 is installed between the main heat exchange box 41 and the secondary heat dissipation box 42. The heat exchanger selects a suitable heat exchange fluid from the existing technology and fills it into the active heat dissipation component 4, such as modified silicone oil, fluorinated liquid or insulating mineral oil; a pair of coordinating pipes 7 are connected between two adjacent active heat dissipation components 4; a normally open solenoid valve is installed on the lower conduit 44, and electric control valves are installed at both ends of the coordinating pipe 7. By adjusting the control valves, the passage between the two active heat dissipation components 4 is connected or disconnected through the coordinating pipe 7, realizing the switching of "independent / cooperative" mode; at least one pair of heat-conducting beams are installed on the heat dissipation fin assembly 3. The heat-conducting beams are made of copper-aluminum composite material and cover the length range of the heat dissipation fin assembly 3, so that the heat of the main heat exchange box 41 can be laterally conducted to the entire heat dissipation fin assembly 3.

[0024] The circulation pump 6 is connected to the lower conduit 44 and is used to drive the circulation of the heat exchange fluid in the active heat dissipation assembly 4. The circulation pump 6 is connected in series with the lower conduit 44. The fluid in the lower conduit 44 is transported to the auxiliary heat dissipation box 42 through the circulation pump 6. A solenoid valve is connected between the lower conduit 44 and the main heat exchange box 41. When the heat exchange fluid flows in the upper conduit 43 and the lower conduit 44, it exchanges heat with the heat dissipation fin assembly 3. Referring to Figure 5, the lower conduit 44 includes a guide inner tube 441 inserted into the main heat exchange box 41 and communicating with the coordination pipe 7. The guide inner tube 441... The outer end of the tube is fitted with a heat exchange sleeve 442 that communicates with the main heat exchange box 41. The input end of the circulating pump 6 is equipped with a mixing pipe 443 that communicates with both the inner guide pipe 441 and the heat exchange sleeve 442 (the mixing pipe 443 adopts existing technology, such as a tubular mixer). The heat exchange liquid output from the coordination pipe 7 and the heat exchange liquid from the main heat exchange box 41 to the auxiliary heat exchange box 42 are first heat exchanged through the inner guide pipe 441 and the heat exchange sleeve 442 until their temperatures are close before being mixed, so as to avoid direct contact between the heat exchange liquids with high temperature difference and avoid thermal shock.

[0025] A control valve is connected between the coordination pipe 7 and the main heat exchange box 41. The coordination pipe 7 is used to control the connection and disconnection of adjacent active heat dissipation components 4. One coordination pipe 7 is used to connect two adjacent main heat exchange boxes 41, and another coordination pipe 7 is used to connect two adjacent auxiliary heat dissipation boxes 42. Heat exchange fins are installed on the coordination pipe 7. The heat exchange fluid supplied from the main heat exchange box 41 to the coordination pipe 7 can be pre-cooled by the heat exchange fins and then input into another main heat exchange box 41.

[0026] The workflow of this solution is as follows: System initialization: Real-time monitoring of the temperature data of each iron core 2 in the transformer housing 1 corresponding to the main heat exchange box 41 (specifically, the temperature of the heat exchange fluid in the main heat exchange box 41 is detected). The heat dissipation structure is in a low-power standby state by default, the cooling fan group 5 runs at the basic speed, and the circulating pump 6, solenoid valve and coordination pipe 7 control valve are all in the closed state.

[0027] Normal heat dissipation state: When the temperature of all main heat exchange boxes 41 is within the safe set value range, the heat of the iron core 2 is transferred to the main heat exchange box 41 through the heat transfer oil, and is naturally dissipated through the heat dissipation fins of the heat dissipation fin group 3. The heat dissipation fan group 5 maintains the basic speed to assist air cooling.

[0028] Active cooling mode: If the temperature of any main heat exchanger 41 is higher than the safety set value and there is no significant difference in temperature between its adjacent main heat exchangers 41, the circulation pump 6 of the corresponding active cooling component 4 is started, the solenoid valve of the lower conduit 44 is opened, the heat exchange fluid circulates between the main heat exchanger 41 and the auxiliary heat exchanger 42, dispersing the heat to the entire heat dissipation fin assembly 3, and the cooling fan assembly 5 switches to medium-high speed to accelerate heat dissipation; when the temperature of the main heat exchanger 41 is within the safe range within the set time length, it returns to the normal cooling mode.

[0029] Referring to Figure 9, the multi-component coordinated heat dissipation state (hereinafter, a and b are used to distinguish the two components for explanation): If the temperature of a main heat exchanger 41 (41a) is higher than the set safety threshold and its adjacent active heat dissipation components 4 (4b and 4c) are not actively dissipating heat, the control valve of the coordination pipe 7 between the two is opened, the solenoid valve at the corresponding lower conduit 44 (44a) is closed (causing the lower conduit 44 to close), and its corresponding circulation pump 6 (6a) is turned off. The other circulation pump 6 (6b) is started and adjusted to work. The high-temperature heat exchange liquid in one main heat exchanger 41 (41a) flows through the coordination pipe 7 to the adjacent main heat exchanger 41 (41b), and then through the lower conduit 44 (44b) to the auxiliary heat dissipation box 42 (41a). 2b) The heat exchange fluid is split at the secondary heat exchange box 42 (42b). Part of the heat exchange fluid flows back to the adjacent secondary heat exchange box 42 (42a) through the coordination pipe 7, and the other part of the heat exchange fluid flows back to the main heat exchange box 41 (41b) through the upper conduit 43 (43b). The heat exchange fluid flowing back to the adjacent secondary heat exchange box 42 (42a) flows back to the main heat exchange box 41 (41a) through the upper conduit 43 (43a) connected to it. Then the above process is repeated to achieve circulation. The heat exchange fluid circulates and dissipates heat in the two active heat dissipation components 4. The heat dissipation fan group 5 maintains a medium-high speed. The multi-component cooperative heat dissipation state can make the heat of the main heat exchange box 41 with excessive temperature dispersed to the two heat dissipation fin groups 3 for heat dissipation.

[0030] If the temperature of the main heat exchanger 41 is higher than the set safety threshold and the temperature of its adjacent active heat dissipation components 4 is also higher than the safety set value, an alarm will be triggered, and all active heat dissipation components 4 will be set to active heat dissipation mode.

[0031] When the temperature of all main heat exchangers 41 drops back to a safe range, close the control valve of the coordination pipe 7, stop the coordination mode, and return to the normal heat dissipation or active heat dissipation state, continuously and dynamically monitoring the temperature to adjust the heat dissipation strategy.

[0032] This solution achieves real-time monitoring of the temperature data of the main heat exchange box 41 corresponding to each iron core. The system can automatically switch between conventional cooling, single-component active cooling, and multi-component collaborative cooling modes based on different temperature conditions, ensuring optimal heat dissipation under various operating conditions. In conventional cooling mode, the heat dissipation fins are used for natural cooling in conjunction with the cooling fan group 5 operating at its base speed, ensuring basic cooling requirements while effectively reducing energy consumption. In active cooling mode, when the local temperature is too high, heat is distributed to the entire heat dissipation fin group 3 through heat exchange fluid circulation, and then accelerated by the cooling fan group 5 to quickly reduce the local temperature. The multi-component collaborative cooling mode innovatively achieves coordinated work between adjacent active cooling components 4. The coordination pipe 7 distributes the heat from the high-temperature heat exchange fluid to adjacent lower-temperature cooling structures, avoiding direct contact between heat exchange fluids with high temperature differences, improving heat dissipation efficiency, and balancing the temperature of each cooling structure, further ensuring the stable operation of the transformer. This multi-level, adaptive heat dissipation control method not only significantly improves the heat dissipation effect but also greatly enhances the safety and reliability of transformer operation and extends the service life of the equipment.

[0033] The second implementation method also includes an auxiliary heat dissipation system, which includes a data acquisition module, a data processing module, and a control module. The data acquisition module is used to collect temperature data of each iron core 2 inside the transformer housing 1 and the corresponding main heat exchange box 41 of the iron core 2 in real time, providing a basis for temperature monitoring of the system. Temperature data is collected by setting temperature sensors, and those skilled in the art can select suitable sensors from the prior art for installation. The data processing module is used to receive the temperature data transmitted by the data acquisition module, analyze and judge whether the temperature of each main heat exchange box 41 is higher than the set value and the temperature difference between adjacent components, and determine the heat dissipation mode to be executed according to the preset logic: conventional heat dissipation, single component active heat dissipation, or multi-component collaborative heat dissipation.

[0034] The control module receives instructions from the data processing module and controls the speed of the cooling fan group 5 (base speed or medium-high speed), the start and stop of the circulating pump 6, the opening and closing of the solenoid valve on the lower conduit 44, and the opening and closing of the control valve on the coordination pipe 7, so as to realize the switching and operation of different cooling modes.

[0035] The heat dissipation modes include: Normal heat dissipation state: The temperature at all main heat exchange boxes 41 is below the safety setpoint, and only the base speed of the cooling fan group 5 is activated; the cooling fan group 5 maintains its base speed with a PWM signal with a 20% duty cycle, providing only a weak airflow for auxiliary heat dissipation; Active heat dissipation state: If the temperature at any main heat exchange box 41 is above the safety setpoint, the data processing module determines that no coordination is needed, activates the corresponding circulation pump 6 and increases the speed of the cooling fan group 5. Upon receiving the medium-high speed command, the cooling fan group 5 provides strong air cooling to the heat dissipation fin group 3, rapidly reducing the medium temperature; Multi-component coordinated heat dissipation state: If the local temperature exceeds the set safety threshold and the adjacent active heat dissipation component 4 is not actively dissipating heat, the control valve of the coordination pipe 7 is opened, allowing the high-temperature heat exchange fluid that has absorbed the heat emitted by the iron core 2 to flow into the adjacent active heat dissipation component 4 for circulation through the coordination pipe 7, and further increasing the speed of the cooling fan group 5 corresponding to the two active heat dissipation components 4; The auxiliary heat dissipation system of this embodiment realizes intelligent and refined control of the transformer heat dissipation process. By capturing the temperature of each main heat exchanger 41 in real time through the data acquisition module, the heat dissipation status inside the transformer can be accurately grasped. This avoids the rough judgment of the overall temperature by traditional heat dissipation methods. In-depth analysis can be performed based on the collected temperature data. It can not only identify whether a single main heat exchanger 41 is overheating, but also pay attention to the temperature status of adjacent active heat dissipation components 4. This allows for the formulation of more targeted heat dissipation strategies. It can activate active heat dissipation of a single component to actively cool the area, or coordinate multiple active heat dissipation components 4 to perform rapid local heat dissipation without having to perform high-intensity heat dissipation on the entire transformer, effectively reducing energy consumption.

[0036] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A fully enclosed transformer heat dissipation structure, comprising a transformer housing (1), wherein multiple iron cores (2) are mounted on the transformer housing (1), and multiple pairs of heat dissipation fin groups (3) matching the iron cores (2) are mounted on the outer wall of the transformer housing (1), characterized in that: The bottom end of the heat dissipation fin assembly (3) is equipped with a heat dissipation fan assembly (5) and a circulation pump (6); an active heat dissipation component (4) is installed on the heat dissipation fin assembly (3), the active heat dissipation component (4) includes a main heat exchange box (41) and a secondary heat dissipation box (42) installed at both ends of the heat dissipation fin assembly (3), the main heat exchange box (41) and the secondary heat dissipation box (42) are connected by an upper conduit (43) and a lower conduit (44), one end of the main heat exchange box (41) is embedded in the transformer housing (1), the upper conduit (43) and the lower conduit (44) are connected by an upper conduit (43) and a lower conduit (44). 44) All penetrate the heat dissipation fin assembly (3); the circulation pump (6) is connected to the lower conduit (44) and is used to drive the heat exchange liquid in the active heat dissipation assembly (4) to circulate. The heat exchange liquid exchanges heat with the heat dissipation fin assembly (3) when it flows in the upper conduit (43) and the lower conduit (44); a pair of coordination pipes (7) are connected between two adjacent active heat dissipation assemblies (4), and a control valve is connected between the coordination pipe (7) and the main heat exchange box (41); the coordination pipe (7) is used to control the connection and disconnection of adjacent active heat dissipation assemblies (4).

2. The fully enclosed transformer heat dissipation structure according to claim 1, characterized in that: The coordinating pipe (7) is equipped with heat exchange fins. The heat exchange liquid from the main heat exchange box (41) to the coordinating pipe (7) is pre-cooled by the heat exchange fins and then input into another main heat exchange box (41).

3. The fully enclosed transformer heat dissipation structure according to claim 1, characterized in that: The lower conduit (44) includes a guide inner tube (441) communicating with the coordination tube (7). The outer end of the guide inner tube (441) is sleeved with a heat exchange sleeve (442) communicating with the main heat exchange box (41). The input end of the circulation pump (6) is equipped with a mixing tube (443) communicating with both the guide inner tube (441) and the heat exchange sleeve (442). The heat exchange liquid output from the coordination tube (7) exchanges heat with the heat exchange liquid from the main heat exchange box (41) to the auxiliary heat exchange box (42) and then mixes them.

4. The fully enclosed transformer heat dissipation structure according to claim 1, characterized in that: The cooling fan assembly (5) includes multiple pairs of axial fans, and the multiple pairs of axial fans are distributed between the main heat exchange box (41) and the auxiliary heat exchange box (42). The circulating pump (6) is located in the middle of the cooling fan assembly (5).

5. The fully enclosed transformer heat dissipation structure according to claim 1, characterized in that: At least one pair of heat-conducting beams are installed on the heat dissipation fin assembly (3), and the heat-conducting beams cover the length range of the heat dissipation fin assembly (3).

6. The fully enclosed transformer heat dissipation structure according to claim 1, characterized in that: One end of the main heat exchange box (41) is inserted into the transformer housing (1) and heat exchange plates are installed. The main heat exchange box (41) is sealed to the transformer housing (1). The circulating pump (6) is installed between the main heat exchange box (41) and the auxiliary heat exchange box (42).

7. A fully enclosed transformer heat dissipation structure according to any one of claims 1-6, characterized in that: It also includes an auxiliary heat dissipation system, which includes a data acquisition module, a data processing module and a control module. The data acquisition module is used to collect the temperature data of each iron core (2) in the transformer housing (1) and the corresponding main heat exchange box (41) of the iron core (2) in real time. The data processing module is used to analyze the temperature data and select the heat dissipation mode as needed. The control module is used to execute the instructions of the data processing module to control the speed of the heat dissipation fan group (5), the start and stop of the circulation pump (6), the opening and closing of the solenoid valve on the lower conduit (44) and the flow direction switching of the control valve on the coordination pipe (7).

8. The fully enclosed transformer heat dissipation structure according to claim 7, characterized in that: The heat dissipation modes include: normal heat dissipation state: the temperature at all main heat exchange boxes (41) is lower than the safety set value, and only the basic speed of the heat dissipation fan group (5) is started; active heat dissipation state: the temperature at any main heat exchange box (41) is higher than the safety set value, the corresponding circulation pump (6) is started and the speed of the heat dissipation fan group (5) is increased; multi-component collaborative heat dissipation state: the local temperature is higher than the set safety threshold and the adjacent active heat dissipation component (4) does not perform active heat dissipation, the control valve of the coordination pipe (7) is opened, so that the high temperature heat exchange liquid flows into the adjacent active heat dissipation component (4) through the coordination pipe (7) for circulation, and the speed of the heat dissipation fan group (5) corresponding to the two active heat dissipation components (4) is further increased.

9. The fully enclosed transformer heat dissipation structure according to claim 1, characterized in that: If the temperature of the main heat exchange box (41) is higher than the set safety threshold and the temperature of its adjacent active heat dissipation components (4) is higher than the safety set value, an alarm will be triggered, and all active heat dissipation components (4) will be set to active heat dissipation mode.

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