High-heat-dissipation dry-type transformer

Abstract

The invention discloses a high-heat-dissipation dry-type transformer. The high-heat-dissipation dry-type transformer comprises a transformer body and a supporting bottom block, wherein the supporting bottom block is used for supporting and installing the transformer body; the air guide assembly is detachably installed above the supporting bottom block and used for feeding air into the transformer body so as to accelerate air flowing; the diffusion assembly is arranged on the transformer body and used for diffusing and changing the area and direction of air supplied by the air guide assembly, and the air guide assembly can guide the air output by the air blower into the transformer body to form forced convective circulation; air entering the transformer body diffuses the coverage area range of the air through the diffusion assembly, the heat dissipation capacity of the winding and the iron core is further improved, meanwhile, the vertically-entering air is adjusted to be in a spiral rising state, the standing time of the air flow in the transformer body is prolonged through the centrifugal effect, and the heat dissipation efficiency is improved. Meanwhile, the contact area range with the winding and the iron core is increased, and the heat exchange efficiency is enhanced.

Description

Technical Field

[0001] This invention belongs to the field of transformer heat dissipation technology, and specifically relates to a high heat dissipation dry-type transformer. Background Technology

[0002] A dry-type transformer is a power transformer that does not rely on liquid media (such as oil) for cooling and insulation. Its core feature is that it uses air or solid insulating materials (such as epoxy resin, fiberglass cloth, etc.) to achieve electrical insulation and heat dissipation.

[0003] A search of application number 201520662646 reveals a high-efficiency heat-dissipating dry-type transformer, comprising an iron core, high-voltage coil, high-voltage terminals, low-voltage coil, low-voltage terminals, clamps, screws, nuts, bushings, insulating columns, clamp bases, and wooden feet. Its distinguishing feature is the inclusion of a heat-dissipating fan. The iron core is composed of multiple layers of corrugated silicon steel sheets. This invention provides a transformer with a large iron core heat dissipation area and a fan, resulting in high heat dissipation efficiency, which helps reduce the overall temperature rise of the transformer and thus extends its service life. However, the aforementioned patents simply use crossflow fans to dissipate heat from the outside of the transformer body, resulting in limited heat dissipation. Furthermore, the crossflow fan airflow is difficult to enter the heat dissipation channels, making it unsuitable for high-temperature environments. Traditional dry-type transformers primarily rely on natural convection for heat dissipation, and their heat dissipation efficiency is limited by ambient temperature, load rate, and structural design. Especially under high-temperature and high-load conditions, the winding and core temperatures rise significantly, easily leading to insulation material aging and even equipment failure. Summary of the Invention

[0004] The purpose of this invention is to provide a high-heat-dissipation dry-type transformer to solve the transformer heat dissipation problem proposed in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-heat-dissipation dry-type transformer includes a transformer body and a supporting base block: the supporting base block is used to support and install the transformer body. Air guide assembly: The air guide assembly is detachably installed above the support base block to deliver air into the transformer body to accelerate airflow; Diffusion component: The diffusion component is located in the transformer body and is used to diffuse and change the area and direction of the air supplied by the air guide component; Preferably, the transformer body consists of an outer cylinder and an inner cylinder, which are concentrically mounted on a supporting base block. A heat dissipation channel is formed between the coaxial outer and inner cylinders to guide the air supplied by the diffusion assembly. A supporting sheet metal is provided at the bottom of the supporting base block to stabilize the position of the air-guiding assembly. A blower is connected below the air-guiding assembly to supply air into it. A cross-flow fan is installed near the blower. The blower, in conjunction with the air-guiding assembly, enters the heat dissipation channel to accelerate heat dissipation; simultaneously, the cross-flow fan provides auxiliary heat dissipation to the outer wall of the transformer body. This internal and external air-cooling method significantly improves the heat dissipation effect on the transformer body.

[0006] Preferably, the top of the support base has a protrusion, and the outer cylinder and inner cylinder are respectively attached to the left and right sides of the protrusion. A slot is provided in the middle of the protrusion for positioning and adapting the installation of the air guide assembly. The air guide assembly includes an air guide box and an air guide pipe. The air guide box has an air chamber, and an air outlet is provided in the middle of the air chamber. The air guide pipe is detachably installed below the air outlet, and a cylindrical connector is provided at the bottom of the air guide pipe for connecting to the output end of the blower.

[0007] Preferably, the air guiding assembly includes an air guiding box and an air guiding duct. The air guiding box contains an air chamber with an air outlet in the center. The air guiding duct is detachably installed below the air outlet, and its bottom has a cylindrical connector for connecting to the output end of a blower. The cylindrical connector fits the blower's output end, facilitating connection between the air guiding assembly and the blower. The blower's output air enters the air guiding duct and exits from the air outlet, which flows vertically upwards. The air guiding box and duct design ensure that the blower's output air is precisely directed into the heat dissipation channel, directly acting on the transformer body, thereby improving the internal heat dissipation of the transformer and increasing its operating efficiency.

[0008] Preferably, the air guide box has pressure plates at both ends, and the bottom of the pressure plates has a retaining plate for insertion into the retaining groove. The detachable connection of the air guide assembly is achieved by the retaining plate and the retaining groove interlocking, and the insertion installation method can greatly improve the convenience of installation; at the same time, the surfaces of the pressure plates and the protrusions are provided with holes for connecting bolts, and the air guide assembly can be further fixed by adding bolts.

[0009] Preferably, the inner wall of the air duct has symmetrical guide blocks on both sides, and the air outlet has symmetrical air supply holes on both sides. A collecting pipe is detachably installed below the air supply holes. When the air inside the air duct flows upward, some air volume enters the guide blocks. The guide blocks and the collecting pipe are kept in communication. Thus, the air enters the collecting pipe and is discharged from the air supply holes. Since the air supply holes are distributed on both sides of the air outlet, the arrangement of the air supply holes can output part of the air volume to both sides of the air duct box, thereby increasing the airflow area and promoting the expansion of the air duct assembly's air duct area. That is, the contact area between the air and the heat dissipation channel is wider, further improving the heat dissipation effect.

[0010] Preferably, the air guide box is arc-shaped to fit the heat dissipation channel. The arc-shaped air guide box can fit and fill the heat dissipation channel, quickly guiding the air into the heat dissipation channel. This avoids the ineffective loss of air volume and concentrates the air volume to be transported into the heat dissipation channel, further improving the heat dissipation function.

[0011] Preferably, the diffusion component includes air diffusers, several of which are welded equidistantly to the inner wall of the outer cylinder. The air diffusers are spiral-shaped; three diffusers at equal intervals form a spiral with a certain arc. When air comes into contact with the surface of the air diffuser, it changes direction, thus diffusing to other surfaces of the heat dissipation channel and carrying away heat over a larger area. The spiral structure of the air diffuser transforms the vertically entering airflow into a spiral upward flow, prolonging the residence time of the airflow inside the transformer. This allows the hot air to continuously exchange heat with the windings and core during its ascent, preventing heat accumulation at the top. In natural convection, a layer of stagnant hot air easily forms at the top, leading to accelerated local insulation aging. The spiral-shaped air diffusers, by forcing the airflow to rotate, break down the stagnant layer, allowing the hot air at the top to be quickly discharged.

[0012] The air expansion plate is welded to the inner wall of the outer cylinder at the top. Based on physical changes, hot air rises and accumulates at the top of the transformer body, so the heat at the top of the transformer body is higher than that at the bottom; placing the air expansion plate at the top improves the heat dissipation effect at the top of the transformer.

[0013] Preferably, the width of the air diffuser fills the heat dissipation channels. Filling the heat dissipation channels with width can prevent airflow from leaking out from the gaps, thus avoiding a reduction in the air guiding effect of the air diffuser.

[0014] Preferably, the supporting sheet metal is provided with slots to accommodate rectangular air ducts. The slots can position the rectangular air ducts, preventing vibration from causing them to sway and optimizing the product's performance.

[0015] The technical solution of this invention has the following beneficial effects: 1. The air guide assembly guides the air output from the blower into the transformer body, forming a forced convection circulation. Compared with traditional natural convection cooling, air cooling can accelerate the airflow speed by 3-5 times, reducing the temperature of the windings and core by 15%-25%, which is especially suitable for high-load or high-temperature environments. The air entering the transformer body is diffused by the diffuser assembly to expand the coverage area of ​​the airflow, further improving the heat dissipation capacity of the windings and core. At the same time, the vertically entering airflow is adjusted to a spiral upward state, using the centrifugal effect to prolong the residence time of the airflow inside the transformer body, while increasing the contact area with the windings and core, and enhancing the heat exchange efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a diagram showing the installation location of the air guide assembly of the present invention.

[0019] Figure 3 A top view showing the installation location of the air guide assembly of the present invention.

[0020] Figure 4 This is a disassembled assembly diagram of the air guide component of the present invention.

[0021] Figure 5 This is a schematic diagram of the air guide assembly structure of the present invention.

[0022] Figure 6 This is an internal cross-sectional view of the air guide assembly of the present invention.

[0023] Figure 7 This is a perspective view of the internal airflow direction of the air guide assembly of the present invention.

[0024] Figure 8 An installation perspective view of the diffusion assembly of the present invention.

[0025] Figure 9 This is a distribution diagram of the expansion plate of the present invention.

[0026] Figure 10 This is a diagram showing the installation position of the crossflow fan according to the present invention.

[0027] Figure 11 This is a wind direction flow plan view of the present invention.

[0028] Figure 12 This is a diagram of the supporting sheet metal structure of the present invention.

[0029] Reference numerals: 10. Transformer body; 101. Outer cylinder; 102. Inner cylinder; 103. Heat dissipation channel; 104. Support base block; 105. Support sheet metal; 106. Slot; 107. Protrusion; 108. Slot; 20. Air guide assembly; 201. Air guide box; 202. Air chamber; 203. Air outlet; 204. Air guide duct; 205. Connector; 206. Pressure plate; 207. Clamping plate; 208. Guide block; 209. Air collection duct; 210. Air supply hole; 30. Diffuser assembly; 301. Expansion panel; 40. Blower; 50. Crossflow fan. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0031] Example 1: refer to Figures 1-12 A high-heat-dissipation dry-type transformer includes a transformer body 10, a support base 104 for supporting and mounting the transformer body 10, an air guide assembly 20 detachably mounted above the support base 104 for delivering air into the transformer body 10 to accelerate airflow, and a diffuser assembly 30 located on the transformer body 10 for diffusing and changing the area and direction of the air delivered by the air guide assembly 20. In the above scheme, the air guide component 20 can guide the air output by the blower 40 into the transformer body 10 to form a forced convection circulation. Compared with traditional natural convection heat dissipation, air cooling can accelerate the air flow speed by 3-5 times, reducing the temperature of the windings and core by 15%-25%, which is especially suitable for high load or high ambient temperature scenarios. The air entering the transformer body 10 passes through the diffuser component 30 to diffuse the coverage area of ​​the air, further improving the heat dissipation capacity of the windings and core. At the same time, the vertically entering air is adjusted to a spiral upward state, using the centrifugal effect to prolong the residence time of the airflow inside the transformer body 10, while increasing the contact area with the windings and core, and enhancing the heat exchange efficiency.

[0032] Preferred reference Figures 1-3The transformer body 10 is composed of an outer cylinder 101 and an inner cylinder 102. The outer cylinder 101 and the inner cylinder 102 are concentrically assembled on the support base block 104. A heat dissipation channel 103 is formed between the outer cylinder 101 and the inner cylinder 102 on the same axis to guide the air supplied by the diffusion component 30. In a preferred embodiment, the transformer body 10 has a cooling air passage inside, namely a heat dissipation channel 103 formed between the outer cylinder 101 and the inner cylinder 102. The heat dissipation channel 103 is in the shape of a ring. The air delivered by the blower 40 enters the heat dissipation channel 103 and flows rapidly from bottom to top. Finally, it is discharged at the top of the heat dissipation channel 103, thereby taking away the heat accumulated inside the heat dissipation channel 103. It should be noted that: the support base 104 has four equidistant distributions, and an air guide assembly 20 is installed between every two support bases 104. The air guide assemblies 20 are distributed symmetrically (in the Z-axis direction). There are no air guide assemblies 20 in the X-axis direction. Installing the air guide assemblies 20 in the Z-axis direction can facilitate connection with the blower 40.

[0033] The support base 104 has a support sheet metal 105 at its bottom to stabilize the position of the air guide assembly 20. The support sheet metal 105 supports the transformer body 10, and the support base 104 is also supported above the support sheet metal 105. There is also a sheet metal component (not marked) vertically below the support sheet metal 105, which allows the transformer to be installed on the ground or inside the transformer cabinet. At the same time, the support sheet metal 105 and the sheet metal component below it can raise the bottom space of the transformer body 10. The increased distance at the bottom of the transformer body 10 can significantly improve air circulation, thereby assisting in heat dissipation.

[0034] refer to Figure 10 and Figure 11 A blower 40 is connected below the air guide assembly 20 to deliver air into the air guide assembly 20; a crossflow fan 50 is installed near the blower 40.

[0035] The blower 40, together with the air guide assembly 20, enters the heat dissipation channel 103 to accelerate heat dissipation; at the same time, the crossflow fan 50 can assist in heat dissipation on the outer wall of the transformer body 10. The internal and external air cooling mode can greatly improve the heat dissipation effect on the transformer body 10. Furthermore, because there are crossflow fans 50 and blowers 40, the crossflow fans 50 or blowers 40 can be turned on or off according to the transformer's temperature rise, thereby avoiding energy loss. The specific control program needs to be connected to a temperature sensor to provide feedback on the operating temperature of the transformer body 10. The computer then receives the feedback from the temperature sensor through a pre-set program to control the opening and closing of the crossflow fans 50 and blowers 40.

[0036] refer to Figures 4-6 The top of the support block 104 has a protrusion 107. The outer cylinder 101 and the inner cylinder 102 are respectively attached to the left and right sides of the protrusion 107. A slot 108 is provided in the middle of the protrusion 107 for positioning and adapting the installation of the air guide assembly 20.

[0037] In the above scheme, when the support base 104 is fixed on the support sheet metal 105, the outer cylinder 101 and the inner cylinder 102 are respectively attached to the left and right sides of the protrusion 107 to facilitate the concentric assembly of the outer cylinder 101 and the inner cylinder 102, and the left and right sides of the protrusion 107 are curved so that they can match the curved surfaces of the outer cylinder 101 and the inner cylinder 102.

[0038] refer to Figures 4-7 The air guide assembly 20 includes an air guide box 201 and an air guide duct 204. The air guide box 201 contains an air chamber 202, and an air outlet 203 is opened in the middle of the air chamber 202. The air guide duct 204 is detachably installed below the air outlet 203. The bottom of the air guide duct 204 is provided with a cylindrical connector 205 for connecting to the output end of the blower 40. In the above scheme, the cylindrical connector 205 fits into the output end of the blower 40, which facilitates the connection between the air guide assembly 20 and the blower 40. The air output from the blower 40 enters the air guide duct 204 and is discharged from the air outlet 203. The air discharged from the air outlet 203 is vertically upward. Through the air guide box 201 and the air guide duct 204, the air output from the blower 40 can be accurately discharged into the heat dissipation channel 103 and directly act on the transformer body 10, thereby improving the heat dissipation effect inside the transformer body 10 and improving the working efficiency of the transformer body 10. Compared with the traditional method of only using the crossflow fan 50 to dissipate heat on the outer wall of the transformer body 10, the heat dissipation effect is much better. Moreover, it is difficult for the air from the crossflow fan 50 to enter the heat dissipation channel 103, which is not suitable for heat dissipation in high-temperature environments. Among them, reference Figure 4 The air guide box 201 has pressure plates 206 at both ends, and the bottom of the pressure plate 206 has a card plate 207 for inserting into the card slot 108 for cooperation; In the above scheme, the detachable connection of the air guide assembly 20 is achieved by the interlocking of the card plate 207 and the card slot 108. The insertion installation method can greatly improve the convenience of installation. At the same time, the surfaces of the pressure plate 206 and the protrusion 107 are provided with holes for connecting bolts, and the air guide assembly 20 can be fixed by adding bolts.

[0039] Preferred reference Figures 5-7 The inner wall of the air duct 204 has symmetrical guide blocks 208 on both sides, the air outlet 203 has symmetrical air supply holes 210 on both sides, and the air collection pipe 209 can be detachably installed below the air supply holes 210.

[0040] In the above scheme (the arrow in the figure represents the direction of airflow), when the air inside the air duct 204 flows upward, some airflow will enter the guide block 208. The guide block 208 and the air collection duct 209 are kept in communication. Thus, the air will enter the air collection duct 209 and be discharged from the air outlet 210. Since the air outlet 210 is distributed on both sides of the air outlet 203, the air outlet 210 can output part of the airflow to both sides of the air guide box 201, thereby expanding the airflow area and promoting the expansion of the air guide component 20, that is, the contact area between the air and the heat dissipation channel 103 is wider, further improving the heat dissipation effect.

[0041] Among them, the air guide box 201 is arc-shaped to fit the heat dissipation channel 103.

[0042] In this design, the arc-shaped air guide box 201 can fit and fill the heat dissipation channel 103, quickly guiding the air into the heat dissipation channel 103. This avoids the ineffective loss of air volume and concentrates the air volume to be transported into the heat dissipation channel 103, further improving the heat dissipation function. Moreover, the air guide components 20 are only set in two directions in the Z-axis direction, so there are no air guide components 20 in the X-axis direction. As a result, the heat dissipation channel 103 in the X direction between the support blocks 104 is connected to the outside and will not affect the heat exchange of air convection inside the heat dissipation channel 103.

[0043] Example 2: refer to Figure 8 and Figure 9 The diffuser assembly 30 includes an air diffuser plate 301, which is welded to the inner wall of the outer cylinder 101 at equal intervals. The air diffuser plate 301 is spiral in shape.

[0044] In the above scheme, the air diffuser 301 has three equidistant spirals with a certain arc. When the air comes into contact with the surface of the air diffuser 301, it changes direction and diffuses to other surfaces of the heat dissipation channel 103, carrying away heat over a larger area. The spiral structure of the air diffuser 301 transforms the vertically entering airflow into a spiral upward flow, prolonging the residence time of the airflow inside the transformer. This allows the hot air to continuously exchange heat with the windings and core during its ascent, preventing heat accumulation at the top. In natural convection, a hot air stagnation layer (5-10℃ higher than the surrounding temperature) easily forms at the top, leading to accelerated local insulation aging. The spiral-shaped air diffuser 301, by forcing the airflow to rotate, breaks down the stagnation layer, allowing the hot air at the top to be quickly discharged.

[0045] It should be noted that the air expansion plate 301 is welded to the inner wall of the outer cylinder 101 at the top. According to physical changes, hot air will rise and accumulate at the top of the transformer body 10. Therefore, the heat at the top of the transformer body 10 is higher than that at the bottom. Setting the air expansion plate 301 at the top improves the heat dissipation effect at the top of the transformer.

[0046] In the preferred embodiment, the width of the air expansion plate 301 fills the heat dissipation channel 103.

[0047] The width of the heat dissipation channel 103 can prevent airflow from overflowing from the gaps, thus reducing the air guiding effect of the air expansion plate 301.

[0048] Example 3: refer to Figure 12 The supporting sheet metal 105 is provided with a slot 106 to fit the rectangular air duct 204.

[0049] In the above solution, slot 106 can position the rectangular air duct 204, avoiding vibration from affecting the shaking of the air duct 204 and optimizing the performance of this product.

[0050] The specific implementation process of this embodiment is as follows: The blower 40, together with the air guide assembly 20, enters the heat dissipation channel 103 to accelerate heat dissipation; at the same time, the crossflow fan 50 can assist in heat dissipation on the outer wall of the transformer body 10. The internal and external air cooling mode can greatly improve the heat dissipation effect on the transformer body 10. The blower 40 outputs air into the air duct 204 and is discharged from the air outlet 203. The air discharged from the air outlet 203 passes vertically upward through the heat dissipation channel 103. When the air inside the air duct 204 flows upward, some of the air volume enters the guide block 208. The guide block 208 is connected to the air collection pipe 209. Thus, the air enters the air collection pipe 209 and is discharged from the air outlet 210, expanding the airflow area. The air diffuser 301 has three equidistant spirals with a certain arc. When the air comes into contact with the surface of the air diffuser 301, it will change direction and spread to other surfaces of the heat dissipation channel 103, carrying away heat over a larger area.

[0051] The above embodiments are merely exemplary models of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Various modifications or equivalent substitutions can be made to the present invention within its spirit and scope of protection. Such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

[0052] In the description of this invention, it should be noted that the terms "inner," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the appended circle, or the orientation or positional relationship in which the product of this invention is conventionally placed during use. They are used only for the convenience of describing the invention and simplifying the description, and 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. Therefore, these terms indicating orientation or positional relationships should not be construed as limitations on the invention.

[0053] In the description of this invention, it should be further noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, these terms can refer to a fixed connection, a detachable connection, or an integral connection between elements; they can also refer to a mechanical connection or an electrical connection; or they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

Claims

1. A high-heat-dissipation dry-type transformer, comprising a transformer body (10), characterized in that: Support block (104): The support block (104) is used to support the installation of the transformer body (10). Air guide assembly (20): The air guide assembly (20) is detachably installed above the support base block (104) to send air into the transformer body (10) to accelerate air flow; Diffusion component (30): The diffusion component (30) is located in the transformer body (10) and is used to diffuse and change the area and direction of the air supplied by the air guide component (20).

2. The high heat dissipation dry-type transformer according to claim 1, characterized in that: The transformer body (10) is composed of an outer cylinder (101) and an inner cylinder (102). The outer cylinder (101) and the inner cylinder (102) are concentrically mounted on a support base block (104). A heat dissipation channel (103) is formed between the outer cylinder (101) and the inner cylinder (102) on the same axis to guide the air supplied by the diffusion assembly (30). The bottom of the support block (104) is supported by a support sheet metal (105) to stabilize the position of the air guide assembly (20). A blower (40) is connected below the air guide assembly (20) to deliver air into the air guide assembly (20); A crossflow fan (50) is installed near the blower (40).

3. The high heat dissipation dry-type transformer according to claim 2, characterized in that: The top of the support base block (104) has a protrusion (107), the outer cylinder (101) and the inner cylinder (102) are respectively attached to the left and right sides of the protrusion (107), and a slot (108) is provided in the middle of the protrusion (107) for positioning and fitting the installation of the air guide assembly (20).

4. The high heat dissipation dry-type transformer according to claim 3, characterized in that: The air guide assembly (20) includes an air guide box (201) and an air guide pipe (204). The air guide box (201) contains an air chamber (202), and an air outlet (203) is opened in the middle of the air chamber (202). The air guide pipe (204) is detachably installed below the air outlet (203). The bottom of the air guide pipe (204) is provided with a cylindrical connector (205) for connecting to the output end of the blower (40).

5. The high heat dissipation dry-type transformer according to claim 4, characterized in that: The air guide box (201) has pressure plates (206) at both ends, and the bottom of the pressure plate (206) has a card plate (207) for inserting into the card slot (108) for engagement.

6. The high heat dissipation dry-type transformer according to claim 5, characterized in that: The inner wall of the air duct (204) has symmetrical guide blocks (208) on both sides, the air outlet (203) has symmetrical air supply holes (210) on both sides, and the air supply hole (210) is detachably installed with an air collection pipe (209) below it.

7. The high heat dissipation dry-type transformer according to claim 4, characterized in that: The air guide box (201) is arc-shaped to fit the heat dissipation channel (103).

8. The high heat dissipation dry-type transformer according to claim 1, characterized in that: The diffuser assembly (30) includes an air diffuser plate (301), which is welded to the inner wall of the outer cylinder (101) at equal intervals. The air diffuser plate (301) is spiral in shape. The air expansion plate (301) is welded to the inner wall of the outer cylinder (101) at the top.

9. The high heat dissipation dry-type transformer according to claim 8, characterized in that: The width of the air expansion plate (301) fills the heat dissipation channel (103).

10. The high heat dissipation dry-type transformer according to claim 2, characterized in that: The supporting sheet metal (105) is provided with a slot (106) to accommodate the rectangular air duct (204).

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