A high-efficiency heat dissipation structure for dry-type transformers
By creating a negative pressure environment through a closed casing and ventilation equipment, combined with efficient heat dissipation channels and thermally conductive materials, the problem of heat dissipation from the internal coils of dry-type transformers is solved, achieving efficient heat dissipation and improved reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI EAGLE DIGITAL ENERGY TECH CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-17
AI Technical Summary
When dry-type transformers are operating under high loads, the heat from the internal coils is difficult to dissipate quickly, leading to temperature rise, which affects the lifespan of the insulation materials and increases the risk of overheating and burning. At the same time, traditional heat dissipation methods are inefficient and can easily cause aging and short circuits due to dust adsorption.
A negative pressure environment is created by using a closed shell and exhaust equipment. Cooling airflow is precisely guided into the heat dissipation channel between the coils through the air supply tray. Combined with high-pressure, low-pressure and high-low-pressure gap heat dissipation channels, a highly efficient heat dissipation cycle of directional air supply and centralized exhaust is formed. High thermal conductivity materials and temperature sensors are used for precise control.
It significantly improves the heat dissipation efficiency of the internal coils, avoids dust adsorption, extends the life of insulation materials, and improves the operational reliability and heat dissipation effect of dry-type transformers.
Smart Images
Figure CN224519635U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dry-type transformer technology, and in particular to a high-efficiency heat dissipation structure for dry-type transformers. Background Technology
[0002] Currently, when dry-type transformers are operating under high load, the high and low voltage coils inside the transformer will generate a lot of heat. Due to the limited thermal conductivity of the insulation material and the close arrangement of the coils, the heat inside the transformer is difficult to dissipate quickly, resulting in a significant increase in the overall temperature of the dry-type transformer. This not only affects the lifespan of the insulation material but may also cause overheating faults or lead to coil burnout.
[0003] Therefore, dry-type transformers are usually equipped with external cooling fans to blow air directly onto the transformer for air cooling. However, since the cooling airflow blown out by the cooling fan is diverted after impacting the outer surface of the dry-type transformer, the cooling effect is dispersed. Therefore, even if multiple cooling fans are installed, it is impossible to effectively dissipate heat from the internal coils through the outer surface of the dry-type transformer.
[0004] In addition, the diverted cooling airflow will cause dust. The dust will be attracted by the electric field generated during the operation of the dry-type transformer, and will easily adhere to various parts of the dry-type transformer. This will not only easily lead to the aging of the dry-type transformer, but also increase the risk of short circuit (dust may conduct electricity, leading to the deterioration of insulation performance), which will greatly reduce the reliability of the dry-type transformer. Utility Model Content
[0005] To address the aforementioned shortcomings, the purpose of this invention is to propose a high-efficiency heat dissipation structure for dry-type transformers, thereby solving the problems of low heat dissipation efficiency and easy dust generation associated with traditional heat dissipation methods for dry-type transformers.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A high-efficiency heat dissipation structure for a dry-type transformer includes a closed housing and an exhaust device disposed outside the closed housing, wherein the top of the closed housing is connected to the exhaust device;
[0008] At least one dry-type transformer is installed inside the enclosed housing. Each dry-type transformer is equipped with a corresponding air supply device and an air supply tray. A heat dissipation channel is provided between the coils of the dry-type transformer, running from the top to the bottom. The air supply tray is located at the bottom of the dry-type transformer, and the air outlet of the air supply tray is directly opposite the bottom port of the heat dissipation channel. The air supply device is located outside the enclosed housing, and the air duct of the air supply tray is connected to the air supply device.
[0009] Furthermore, the heat dissipation channel includes a high-voltage heat dissipation channel, a high-low voltage gap heat dissipation channel, and a low-voltage heat dissipation channel; the dry-type transformer includes a high-voltage coil section, a low-voltage coil section, and an iron core; the low-voltage coil section is wound around the outer periphery of the iron core, and the high-voltage coil section is wound around the outer periphery of the low-voltage coil section; a gap is left between the inner periphery of the high-voltage coil section and the outer periphery of the low-voltage coil section to form the high-low voltage gap heat dissipation channel;
[0010] The high-voltage coil section has gaps between its winding layers to form the high-voltage heat dissipation channel.
[0011] The low-voltage coil section has gaps between its winding layers to form the low-voltage heat dissipation channel.
[0012] Furthermore, the high-voltage coil section is cast with an insulating shell that covers all the winding layers. The insulating shell partially seals the gaps between the winding layers of the high-voltage coil section, forming multiple high-voltage heat dissipation channels that run from the top to the bottom, thus constituting the high-voltage heat dissipation channels.
[0013] Furthermore, each winding layer of the low-voltage coil section is individually encapsulated with insulating material, and multiple insulating spacers are provided between the winding layers.
[0014] Furthermore, the air outlet of the air supply tray includes a first air outlet, a second air outlet, and a third air outlet; the first air outlet, the second air outlet, and the third air outlet are respectively configured as annular air outlets at the bottom ends of the high-pressure heat dissipation channel, the high-low pressure gap heat dissipation channel, and the low-pressure heat dissipation channel.
[0015] Furthermore, the first air outlet, the second air outlet, and the third air outlet are each provided with independent air ducts connecting to individual air supply devices.
[0016] Furthermore, the insulating outer shell is cast from a high thermal conductivity epoxy resin composite material with a core-shell structure.
[0017] Furthermore, the encapsulated insulation material of the low-voltage coil section is a high thermal conductivity epoxy resin composite material with a core-shell structure; the insulating spacer is cast using a high thermal conductivity epoxy resin composite material with a core-shell structure.
[0018] Furthermore, the high-pressure heat dissipation channel, the high-low pressure gap heat dissipation channel, and the low-pressure heat dissipation channel are all equipped with temperature sensors, and the temperature sensors, the air supply device, and the exhaust device are all electrically connected to the controller.
[0019] Furthermore, multiple temperature sensors are provided along the high-pressure heat dissipation channel, the high-low pressure gap heat dissipation channel, or the low-pressure heat dissipation channel from top to bottom.
[0020] The technical solution provided by this utility model can include the following beneficial effects: A closed shell combined with an exhaust system creates a negative pressure environment. When the air supply tray precisely guides the cooling airflow from the air supply equipment into the heat dissipation channel between the coils of the dry-type transformer, the cooling airflow exchanges heat with the heating coils of the dry-type transformer, forming a hot airflow. This hot airflow rises and converges at the top of the closed shell, where it is extracted by the exhaust system, forming a highly efficient heat dissipation cycle of "directional air supply + centralized exhaust." Thus, the cooling airflow is no longer diverted by the shell surface but directly penetrates into the coils, significantly improving the heat dissipation efficiency of the internal coils. Furthermore, the closed shell effectively prevents external dust from entering, avoiding aging and short-circuit risks caused by dust adsorption, and greatly improving the operational reliability of the dry-type transformer. In addition, the exhaust system is located at the top, conforming to the physical characteristic of rising hot airflow, which accelerates heat dissipation and further enhances the heat dissipation effect. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of a high-efficiency heat dissipation structure for a dry-type transformer, which is one embodiment of this utility model.
[0022] Figure 2 Is it like this? Figure 1 The diagram shows the structure of the dry-type transformer and the air supply tray.
[0023] Figure 3 Is it like this? Figure 2 The top view of the high-voltage coil section is shown.
[0024] Figure 4 Is it like this? Figure 2 The diagram shows a top view of the low-voltage coil section.
[0025] Figure 5 Is it like this? Figure 2 The top view of the air supply tray shown.
[0026] The components include: 1. Enclosed shell; 2. Dry-type transformer; 3. Air supply equipment; 4. Air supply tray; 5. Heat dissipation channel; 6. Exhaust equipment; 51. High-voltage heat dissipation channel; 52. High-low voltage gap heat dissipation channel; 53. Low-voltage heat dissipation channel; 21. High-voltage coil section; 22. Low-voltage coil section; 23. Iron core; 211. Insulating shell; 511. High-voltage heat dissipation small channel; 221. Insulating block; 41. First air outlet; 42. Second air outlet; 43. Third air outlet. Detailed Implementation
[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0028] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.
[0029] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0030] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.
[0031] The following is combined with Figures 1 to 5 This describes a high-efficiency heat dissipation structure for a dry-type transformer according to an embodiment of the present invention.
[0032] A high-efficiency heat dissipation structure for a dry-type transformer includes a closed housing 1 and an exhaust device 6 disposed outside the closed housing 1, with the top of the closed housing 1 connected to the exhaust device 6.
[0033] At least one dry-type transformer 2 is installed inside the enclosed housing 1. Each dry-type transformer 2 is equipped with an air supply device 3 and an air supply tray 4. A heat dissipation channel 5 is provided between the coils of the dry-type transformer 2, running from the top to the bottom. The air supply tray 4 is located at the bottom of the dry-type transformer 2, and the air outlet of the air supply tray 4 is directly opposite the bottom port of the heat dissipation channel 5. The air supply device 3 is located outside the enclosed housing 1, and the air duct of the air supply tray 4 is connected to the air supply device 3.
[0034] In a preferred embodiment of the high-efficiency heat dissipation structure for a dry-type transformer, this utility model provides an example, such as... Figure 1 and 2As shown, a negative pressure environment is created by using a closed shell 1 and an exhaust fan 6. When the air supply tray 4 precisely guides the cooling airflow from the air supply device 3 into the heat dissipation channel 5 between the coils of the dry-type transformer 2, the cooling airflow exchanges heat with the heating coils of the dry-type transformer 2, forming a hot airflow. This hot airflow rises and converges at the top of the closed shell 1, where it is extracted by the exhaust fan 6, forming a highly efficient heat dissipation cycle of "directional air supply + centralized exhaust". Thus, the cooling airflow is no longer diverted by the shell surface but directly penetrates into the coils, significantly improving the heat dissipation efficiency of the internal coils. Furthermore, the closed shell 1 effectively prevents external dust from entering, avoiding aging and short-circuit risks caused by dust adsorption, and greatly improving the operational reliability of the dry-type transformer 2. In addition, the exhaust fan 6 is located at the top, conforming to the physical characteristic of rising hot airflow, which accelerates heat dissipation and further enhances the heat dissipation effect.
[0035] Furthermore, the heat dissipation channel 5 includes a high-voltage heat dissipation channel 51, a high-low voltage gap heat dissipation channel 52, and a low-voltage heat dissipation channel 53; the dry-type transformer 2 includes a high-voltage coil section 21, a low-voltage coil section 22, and an iron core 23; the low-voltage coil section 22 is wound around the outer periphery of the iron core 23, and the high-voltage coil section 21 is wound around the outer periphery of the low-voltage coil section 22; a gap is left between the inner periphery of the high-voltage coil section 21 and the outer periphery of the low-voltage coil section 22 to form the high-low voltage gap heat dissipation channel 52;
[0036] A gap is left between the winding layers of the high-voltage coil section 21 to form a high-voltage heat dissipation channel 51;
[0037] A gap is left between the winding layers of the low-voltage coil section 22 to form a low-voltage heat dissipation channel 53.
[0038] In this embodiment, high-voltage heat dissipation channels 51 and low-voltage heat dissipation channels 53 are respectively provided through the gaps between the internal winding layers of the high-voltage coil section 21 and the low-voltage coil section 22, and a high-low voltage gap heat dissipation channel 52 is provided through the gap between the high-voltage coil section 21 and the low-voltage coil section 22, achieving all-round penetrating heat dissipation for the core heat-generating components of the transformer. Independent heat dissipation paths are constructed for the three main heat-generating areas: the high-voltage coil, the low-voltage coil, and the gap between them, ensuring that heat is quickly dissipated from the inside of the coil winding layers and key gaps, solving the heat accumulation problem caused by the traditional tightly arranged coils. This multi-channel design can cover all key heat-generating parts of the coil, avoiding localized overheating and extending the life of the insulation material.
[0039] It should be noted that the installation method of the air supply tray 4 at the bottom of the dry-type transformer 2 is not limited. For example, the air supply tray 4 can be fixed to the original base of the dry-type transformer 2 with screws. Then, the bottom of the upper part of the dry-type transformer 2 can be pressed tightly against the air supply tray 4 by its own weight. Alternatively, the bottom of the high-voltage coil section 21, low-voltage coil section 22, or iron core 23 and other components on the upper part of the dry-type transformer 2 can be provided with a fixing post, which passes through the air supply tray 4 and extends to the original base of the dry-type transformer 2. The fixing post is used to fix it to the original base (such as plug-in fixing, nut fixing, etc.).
[0040] Furthermore, the high-voltage coil section 21 is cast with an insulating shell 211 that covers all the winding layers. The insulating shell 211 partially seals the gaps between the winding layers of the high-voltage coil section 21, forming multiple high-voltage heat dissipation channels 511 that run from the top to the bottom, thus forming high-voltage heat dissipation channels 51.
[0041] In this embodiment, as Figure 3 The image shown is a top view of the high-voltage coil section 21 after casting. Since the high-voltage coil section 21 is located on the outermost layer of the dry-type transformer 2, it is necessary to cast the high-voltage coil section 21 into a shell structure that can resist external forces while leaving high-voltage heat dissipation channels 51. Therefore, when casting the insulating shell 211 that wraps all winding layers of the high-voltage coil section 21, multiple high-voltage heat dissipation channels 511 that run from the top to the bottom are reserved by partially sealing the gaps between the winding layers. This enhances the structural stability of the high-voltage coil. Furthermore, the high-voltage heat dissipation channels 51 are formed by independent high-voltage heat dissipation channels 51, which solves the problem of heat dissipation obstruction caused by the insulation material wrapping and achieves a balance between insulation protection and efficient heat dissipation.
[0042] Furthermore, each winding layer of the low-voltage coil section 22 is individually encapsulated with insulating material, and multiple insulating spacers 221 are provided between the winding layers.
[0043] In this embodiment, as Figure 4 As shown, since the low-voltage coil is located in the middle of the dry-type transformer 2, it is preferable to expand the low-voltage heat dissipation channel 53 as much as possible to ensure efficient heat dissipation. Therefore, when the winding layer is individually encapsulated, only the insulating spacer 221 is used between the winding layers to ensure the stability of the gap between the winding layers, thereby reserving a sufficiently large longitudinal space for the low-voltage heat dissipation channel 53.
[0044] It should be noted that the way the insulating spacer 221 is set is not limited. For example, the insulating spacer 221 is a long strip from top to bottom (for example, it can be cast and directly inserted into the gap, or cast together with two adjacent winding layers), which neatly divides multiple small channels from top to bottom to form a low-pressure heat dissipation channel 53.
[0045] Furthermore, the air outlet of the air supply tray 4 includes a first air outlet 41, a second air outlet 42, and a third air outlet 43; the first air outlet 41, the second air outlet 42, and the third air outlet 43 are respectively arranged as annular air outlets at the bottom of the high-pressure heat dissipation channel 51, the high-low pressure gap heat dissipation channel 52, and the low-pressure heat dissipation channel 53.
[0046] In this embodiment, based on the diverse designs of the high-pressure heat dissipation channel 51 and the low-pressure heat dissipation channel 53, the air supply tray 4 must satisfy the directional air supply of the three channels: the high-pressure heat dissipation channel 51, the high-low pressure gap heat dissipation channel 52, and the low-pressure heat dissipation channel 53. Preferably, the air outlet of the air supply tray 4 is provided with an annular air outlet corresponding to each heat dissipation channel, such as... Figure 5 As shown, it can form a precise connection with the coil and gap of the ring structure. So no matter how the high voltage heat dissipation channel 51 and the low voltage heat dissipation channel 53 are configured, they are all within its ring area, ensuring that the cooling airflow is directed into the corresponding heat dissipation channel.
[0047] Furthermore, the first air outlet 41, the second air outlet 42, and the third air outlet 43 are each equipped with independent air ducts connected to separate air supply equipment 3.
[0048] In this embodiment, each air outlet in the air supply tray 4 is connected to a separate air supply device 3 (e.g., through an independent air duct (e.g., layered arrangement)). Figure 5 As shown in the diagram (the independent air ducts of each air outlet in the air supply tray 4 and the positional and installation relationships of the air supply equipment 3 are for illustrative purposes only), the cooling airflow rate and velocity of each channel can be adjusted according to the actual heat dissipation requirements of the high-pressure heat dissipation channel 51, the high-low pressure gap heat dissipation channel 52, and the low-pressure heat dissipation channel 53. This allows for on-demand air supply based on the heat generation level of different channels, avoiding energy waste. Simultaneously, it enables the individual enhancement of heat dissipation in a specific area when it overheats, improving the flexibility and targeted nature of the heat dissipation system.
[0049] Furthermore, the insulating outer shell 211 is cast from a high thermal conductivity epoxy resin composite material with a core-shell structure.
[0050] In this embodiment, the thermal conductivity of general epoxy resin insulation materials is around 0.2 W / (m*k). Therefore, high thermal conductivity epoxy resin is used, which has a thermal conductivity greater than 0.2 W / (m*k). In order to further improve the thermal conductivity of the insulating shell 211, the insulating shell 211 is preferably made of a high thermal conductivity epoxy resin composite material with a core-shell structure material. The core-shell structure material is usually nanoscale or microscale, such as hexagonal boron nitride (h-BN) or aluminum nitride (AlN). After being combined with high thermal conductivity epoxy resin, it significantly improves the thermal conductivity of the high voltage coil section 21, which helps to dissipate heat efficiently through the high voltage heat dissipation channel 51.
[0051] Furthermore, the low-voltage coil section 22 is made of a high thermal conductivity epoxy resin composite material with a core-shell structure; the insulating block 221 is cast using a high thermal conductivity epoxy resin composite material with a core-shell structure.
[0052] In this embodiment, the low-voltage coil section 22 is similar to the high-voltage coil section 21, and preferably uses a high thermal conductivity epoxy resin composite material with a core-shell structure for encapsulation and casting of the insulating spacer 221, which significantly improves the thermal conductivity of the low-voltage coil section 22 and helps to dissipate heat efficiently through the low-voltage heat dissipation channel 53.
[0053] Furthermore, temperature sensors are provided in the high-pressure heat dissipation channel 51, the high-low pressure gap heat dissipation channel 52, and the low-pressure heat dissipation channel 53. The temperature sensors, the air supply device 3, and the exhaust device 6 are all electrically connected to the controller.
[0054] In this embodiment, since each heat dissipation channel is equipped with a dedicated air supply device 3, each channel should also be equipped with a temperature sensor and electrically connected to a controller (such as a PLC) to facilitate the controller to control the air supply device 3 and the exhaust device 6 in a coordinated manner.
[0055] It should be noted that the selection and installation method of the temperature sensor are not limited. It can be: when the temperature sensor is a temperature probe and it is installed in the high voltage coil section 21 or the low voltage coil section 22, it can be inserted into or near the winding and cast and fixed; when it is installed in the high and low voltage gap heat dissipation channel 52, one end of the temperature probe can be cast and fixed in the high voltage coil section 21 or the low voltage coil section 22 and suspended in the high and low voltage gap heat dissipation channel 52.
[0056] Furthermore, multiple temperature sensors are provided from top to bottom along the high-pressure heat dissipation channel 51, the high-low pressure gap heat dissipation channel 52, or the low-pressure heat dissipation channel 53.
[0057] In this embodiment, multiple temperature sensors are installed from top to bottom in the heat dissipation channel to accurately monitor the temperature distribution at different heights within the channel and determine the heat transfer and dissipation within the channel. Multi-point temperature measurement can pinpoint the specific location of the overheated area, providing a precise basis for the directional adjustment of the air supply device 3, avoiding judgment deviations caused by single-point temperature measurement, and improving the accuracy of temperature control and the targeted nature of heat dissipation adjustment.
[0058] Other components and operations of the high-efficiency heat dissipation structure of a dry-type transformer according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.
[0059] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0060] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A high-efficiency heat dissipation structure for a dry-type transformer, characterized in that: It includes a closed housing and an exhaust device disposed outside the closed housing, with the top of the closed housing connected to the exhaust device; At least one dry-type transformer is installed inside the enclosed housing. Each dry-type transformer is equipped with a corresponding air supply device and an air supply tray. A heat dissipation channel is provided between the coils of the dry-type transformer, running from the top to the bottom. The air supply tray is located at the bottom of the dry-type transformer, and the air outlet of the air supply tray is directly opposite the bottom port of the heat dissipation channel. The air supply device is located outside the enclosed housing, and the air duct of the air supply tray is connected to the air supply device.
2. The high-efficiency heat dissipation structure of a dry-type transformer according to claim 1, characterized in that: The heat dissipation channel includes a high-voltage heat dissipation channel, a high-low voltage gap heat dissipation channel, and a low-voltage heat dissipation channel; the dry-type transformer includes a high-voltage coil section, a low-voltage coil section, and an iron core; the low-voltage coil section is wound around the outer periphery of the iron core, and the high-voltage coil section is wound around the outer periphery of the low-voltage coil section; a gap is left between the inner periphery of the high-voltage coil section and the outer periphery of the low-voltage coil section to form the high-low voltage gap heat dissipation channel; The high-voltage coil section has gaps between its winding layers to form the high-voltage heat dissipation channel. The low-voltage coil section has gaps between its winding layers to form the low-voltage heat dissipation channel.
3. The high-efficiency heat dissipation structure of a dry-type transformer according to claim 2, characterized in that: The high-voltage coil section is encased in an insulating shell that covers all the winding layers. The insulating shell partially seals the gaps between the winding layers of the high-voltage coil section, forming multiple small high-voltage heat dissipation channels that run from the top to the bottom, thus constituting the high-voltage heat dissipation channels.
4. The high-efficiency heat dissipation structure for a dry-type transformer according to claim 2, characterized in that: Each winding layer of the low-voltage coil section is individually encapsulated with insulating material, and multiple insulating spacers are provided between the winding layers.
5. The high-efficiency heat dissipation structure of a dry-type transformer according to claim 2, characterized in that: The air outlet of the air supply tray includes a first air outlet, a second air outlet, and a third air outlet; the first air outlet, the second air outlet, and the third air outlet are respectively arranged as annular air outlets at the bottom ends of the high-pressure heat dissipation channel, the high-low pressure gap heat dissipation channel, and the low-pressure heat dissipation channel.
6. The high-efficiency heat dissipation structure of a dry-type transformer according to claim 5, characterized in that: The first air outlet, the second air outlet, and the third air outlet are each provided with an independent air duct that connects to a separate air supply device.
7. The high-efficiency heat dissipation structure of a dry-type transformer according to claim 3, characterized in that: The insulating outer shell is cast from a high thermal conductivity epoxy resin composite material with a core-shell structure.
8. The high-efficiency heat dissipation structure of a dry-type transformer according to claim 4, characterized in that: The low-voltage coil section is encapsulated with a high thermal conductivity epoxy resin composite material with a core-shell structure; the insulating block is cast with a high thermal conductivity epoxy resin composite material with a core-shell structure.
9. The high-efficiency heat dissipation structure for a dry-type transformer according to claim 2, characterized in that: Temperature sensors are provided in the high-pressure heat dissipation channel, the high-low pressure gap heat dissipation channel, and the low-pressure heat dissipation channel. The temperature sensors, the air supply device, and the exhaust device are all electrically connected to the controller.
10. The high-efficiency heat dissipation structure of a dry-type transformer according to claim 9, characterized in that: Multiple temperature sensors are provided along the high-pressure heat dissipation channel, the high-low pressure gap heat dissipation channel, or the low-pressure heat dissipation channel from top to bottom.