A heat dissipation structure for a dry-type transformer

Abstract

This utility model discloses a heat dissipation structure for a dry-type transformer. The heat dissipation structure includes an insulating layer and coil windings disposed therein. A heat-conducting plate is provided on the outer wall of the insulating layer. Several heat-conducting parts are evenly distributed along the circumference of the inner wall of the heat-conducting plate and embedded within the insulating layer. Several heat dissipation fins are evenly distributed along the circumference of the outer wall of the heat-conducting plate. Several inclined ventilation channels are evenly distributed along the circumference within the insulating layer. A cooling fan actively draws in cool air, guiding it to the heat dissipation fins and ventilation channels. The optimized design of the heat-conducting parts increases the contact area between the heat-conducting plate and the insulating layer, improving heat conduction efficiency. The inclined ventilation channel design enhances uniform heat exchange between the cool air and various parts of the insulating layer, effectively reducing the temperature rise of the coil windings. This solution requires only a single fan to stably control the temperature. The dual heat dissipation mechanisms work synergistically to significantly reduce the temperature of the coil windings and the power consumption of the heat dissipation system, achieving energy saving and consumption reduction.

Description

Technical Field

[0001] This utility model relates to the field of dry-type transformer technology, and in particular to a heat dissipation structure for a dry-type transformer. Background Technology

[0002] Dry-type transformers are widely used in lighting, construction, airports, docks, and precision equipment due to their environmental and fire-resistant advantages. Their core characteristic is that the core and windings are not immersed in insulating oil.

[0003] Dry-type transformers are primarily cooled by natural air cooling (AN) and forced air cooling (AF). Under natural cooling (AN), the transformer can operate at its rated capacity for extended periods. Forced cooling (AF), on the other hand, uses cooling fans to force airflow, increasing the output capacity by approximately 50%, making it suitable for short-term overloads or emergency situations. However, overload operation results in increased losses and impedance, leading to poor economic efficiency and making it unsuitable for long-term operation.

[0004] Existing dry-type transformers typically employ cooling fans on both sides below the windings for forced cooling. However, a common problem is that the airflow generated by the fans is primarily vertically upward, with only a portion effectively contacting the winding surface for heat dissipation. The majority of the airflow exhibits low heat dissipation efficiency, resulting in unsatisfactory overall cooling performance. A common industry improvement method is to simply increase the fan power, but this does not effectively improve cooling efficiency. Therefore, a new technical solution is urgently needed to address the inefficiency of existing cooling methods. This application is proposed against this backdrop. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of traditional dry-type transformer designs and provide a product that improves cooling efficiency and saves energy.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A heat dissipation structure for a dry-type transformer includes an insulating layer and coil windings disposed therein. The outer wall of the insulating layer is provided with a heat-conducting plate. The inner wall of the heat-conducting plate is provided with a plurality of heat-conducting parts evenly distributed along the circumference and embedded in the insulating layer. The outer wall of the heat-conducting plate is provided with a plurality of heat dissipation fins evenly distributed along the circumference. The insulating layer is provided with a plurality of inclined ventilation channels evenly distributed along the circumference. The bottom of the insulating layer is provided with a first air guide shroud. The second air guide shroud is provided below the first air guide shroud. The first air guide shroud and the second air guide shroud form a flow channel and are located below the heat dissipation fins. The second air guide shroud is provided with a cooling fan for drawing outside air into the ventilation channel and the flow channel.

[0008] Preferably, the outer wall of the insulating layer is provided with a plurality of heat-conducting grooves to accommodate heat-conducting parts, and the bottom of the insulating layer is provided with a sink groove.

[0009] Preferably, the coil winding is provided with an iron core, and the first and second guide shrouds are provided with clearance grooves to avoid the iron core.

[0010] Preferably, the outer wall of the first flow guide is provided with a plurality of support feet, the support feet being connected and fixed to the second flow guide by screws, and the end face of the first flow guide is provided with an abutment portion that abuts against the inner wall of the settling tank.

[0011] Preferably, the first guide shroud is provided with a first flow-guiding part that tapers towards the axis and is inclined, and the first flow-guiding part is provided with a plurality of equally spaced first ventilation holes.

[0012] Preferably, the bottom inner part of the second air guide is provided with a second ventilation hole, and a filter screen is provided at the inlet of the second ventilation hole.

[0013] Preferably, the top of the insulating layer is further provided with an insulating pad, the insulating pad is provided with a pressure relief groove to avoid the flow channel, and the top of the pressure relief groove is provided with an inclined second flow guide.

[0014] Preferably, the system further includes a substrate, which has several support portions and is fixed to the support feet by screws, so that the second flow guide cover and the substrate maintain a distance for the gas medium to flow through.

[0015] Beneficial effects:

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention utilizes a cooling fan to actively draw in cool air and continuously guide it to the heat dissipation fins and ventilation channels. Combined with a design that increases the contact interface between the heat-conducting plate and the insulation layer, this significantly improves heat transfer efficiency. This allows for more effective heat exchange between the cooling fins and the cool air, thereby effectively controlling and reducing the temperature of the insulation layer and coil windings. Simultaneously, the inclined ventilation channel design increases the contact area between the cool air and the channel walls, ensuring that the cool air flows more evenly across the insulation layer, promoting sufficient heat exchange and further suppressing the temperature rise of the coil windings. Thanks to the above optimized design, this technical solution only requires a single cooling fan for each coil winding to achieve stable temperature control. This dual cooling mechanism works synergistically to further reduce the overall operating temperature of the coil windings. Ultimately, by effectively controlling temperature rise and optimizing fan configuration, this application significantly reduces the power consumption of the cooling system on the dry-type transformer, achieving the technical objective of energy saving and consumption reduction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the heat dissipation structure of a dry-type transformer according to the present invention.

[0019] Figure 2 This is a side cross-sectional view of the heat dissipation structure of a dry-type transformer according to the present invention.

[0020] Figure 3 This utility model Figure 2 A partial enlarged view of point A in the heat dissipation structure of a dry-type transformer;

[0021] Figure 4 This utility model Figure 3 A partial enlarged view of point B in the heat dissipation structure of a dry-type transformer;

[0022] Figure 5 This is an exploded view of the heat dissipation structure of a dry-type transformer according to the present invention. Figure 1 ;

[0023] Figure 6 This is an exploded view of the heat dissipation structure of a dry-type transformer according to the present invention. Figure 2 ;

[0024] The correspondence between the labels and component names in the attached figures is as follows:

[0025] Reference numerals: 1. Insulating layer; 2. Coil winding; 3. Heat-conducting plate; 4. First air guide shroud; 5. Second air guide shroud; 6. Air guide channel; 7. Cooling fan; 8. Relief groove; 9. Substrate;

[0026] 11. Ventilation channel; 12. Heat conduction groove; 13. Settling tank; 14. Insulating pad;

[0027] 141. Pressure relief groove; 142. Second drainage section;

[0028] 21. Iron core;

[0029] 31. Heat-conducting part; 32. Heat dissipation fins;

[0030] 41. Support leg; 42. Contact part; 43. First drainage part; 44. First ventilation hole;

[0031] 51. Second ventilation hole; 52. Filter screen;

[0032] 91. Support section. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model.

[0035] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0036] Reference example Figures 1 to 6 A heat dissipation structure for a dry-type transformer includes an insulating layer 1 and a coil winding 2 disposed therein. The outer wall of the insulating layer 1 is provided with a heat-conducting plate 3. The inner wall of the heat-conducting plate 3 is provided with a plurality of heat-conducting parts 31 evenly distributed along the circumference and embedded in the insulating layer 1. The outer wall of the heat-conducting plate 3 is provided with a plurality of heat dissipation fins 32 evenly distributed along the circumference. The insulating layer 1 is provided with a plurality of inclined ventilation channels 11 evenly distributed along the circumference. The bottom of the insulating layer 1 is provided with a first flow guide shroud 4. The second flow guide shroud 5 is provided below the first flow guide shroud 4. The first flow guide shroud 4 and the second flow guide shroud 5 form a flow guide channel 6 and are located below the heat dissipation fins 32. The second flow guide shroud 5 is provided with a cooling fan 7 for drawing outside air into the ventilation channel 11 and the flow guide channel 6.

[0037] The cooling fan 7 actively draws in cool air and continuously directs it to the heat dissipation fins 32 and ventilation channels 11. Combined with the design of the heat-conducting part 31 to increase the contact interface between the heat-conducting plate 3 and the insulation layer 1, the heat conduction efficiency is significantly improved. This allows heat to be exchanged more effectively between the cooling fins 32 and the cool air, thereby achieving effective control and reduction of the temperature of the insulation layer 1 and the coil winding 2. At the same time, the inclined ventilation channel 11 design increases the contact range between the cool air and the channel wall, ensuring that the cool air can flow more evenly through all parts of the insulation layer 1, promoting sufficient heat exchange and further suppressing the temperature rise of the coil winding 2. Thanks to the above optimized design, this technical solution only needs to configure a single cooling fan 7 for each coil winding 2 to achieve stable control of the winding temperature. This dual heat dissipation mechanism works synergistically to further reduce the overall operating temperature of the coil winding 2. Finally, by effectively controlling the temperature rise and optimizing the fan configuration, this application significantly reduces the heat dissipation system's impact on the operating power consumption of the dry-type transformer, achieving the technical goal of energy saving and consumption reduction.

[0038] It is worth mentioning that the outer wall of the insulating layer 1 is provided with several heat-conducting grooves 12 for accommodating the heat-conducting part 31, and the bottom of the insulating layer 1 is provided with a recessed groove 13. The heat-conducting grooves 12 increase the contact area between the heat-conducting part 31 and the insulating layer 1, thereby improving the heat conduction efficiency. The recessed groove 13 is used in conjunction with the contact part 42.

[0039] It is worth mentioning that the coil winding 2 is provided with an iron core 21, and the first guide shroud 4 and the second guide shroud 5 are provided with clearance grooves 8 to avoid the iron core 21;

[0040] It is worth mentioning that the outer wall of the first flow guide 4 is provided with several support feet 41. The support feet 41 are connected and fixed to the second flow guide 5 by screws. The end face of the first flow guide 4 is provided with an abutment part 42, which abuts against the inner wall of the sink 13. The labyrinth-like sealing structure formed by the abutment part 42 and the sink 13 effectively prevents the gas medium entering the first flow guide 4 from leaking out through the connection gap, thereby ensuring that the cold air can be smoothly introduced into the ventilation channel 11.

[0041] It is worth mentioning that the first air guide shroud 4 is provided with a first air guide part 43 that is tapered towards the axis and is inclined. The first air guide part 43 is provided with a number of first ventilation holes 44 at equal intervals. Through the design of the first air guide part 43, the cold air drawn vertically by the cooling fan 7 can be guided in an orderly manner so that it enters the air guide channel 6 and the first ventilation holes 44 respectively.

[0042] It is worth mentioning that the bottom inner part of the second air guide shroud 5 is provided with a second ventilation hole 51, and a filter screen 52 is provided at the entrance of the second ventilation hole 51. The filter screen 52 is used to filter out impurities in the air entering the second air guide shroud 5, preventing the air guide channel 6 and the first ventilation hole 44 from being blocked due to the accumulation of impurities, thereby ensuring heat dissipation efficiency.

[0043] It is worth mentioning that the top of the insulation layer 1 is also provided with an insulation pad 14. The insulation pad 14 is provided with a pressure relief groove 141 that avoids the flow channel 6. The top of the pressure relief groove 141 is provided with an inclined second flow guide 142. Through the design of the second flow guide 142, hot air can be guided to be discharged quickly and orderly, avoiding the formation of turbulence at the pressure relief groove 141, thereby helping to maintain effective convection circulation and air flow speed.

[0044] It is worth mentioning that the system also includes a substrate 9, which has several support portions 91 and is fixed to the support feet 41 by screws, so that the second flow guide shroud 5 and the substrate 9 maintain a distance for the gas medium to flow.

[0045] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A heat dissipating structure of a dry-type transformer comprising an insulating layer (1) and a coil winding disposed therein, characterized in that: The outer wall of the insulating layer (1) is provided with a heat-conducting plate (3). The inner wall of the heat-conducting plate (3) is provided with a plurality of heat-conducting parts (31) evenly distributed along the circumference and embedded in the insulating layer (1). The outer wall of the heat-conducting plate (3) is provided with a plurality of heat dissipation fins (32) evenly distributed along the circumference. The insulating layer (1) is provided with a plurality of inclined ventilation channels (11) evenly distributed along the circumference. The bottom of the insulating layer (1) is provided with a first flow guide shroud (4). The second flow guide shroud (5) is provided below the first flow guide shroud (4). The first flow guide shroud (4) and the second flow guide shroud (5) form a flow guide channel (6) and are located below the heat dissipation fins (32). The second flow guide shroud (5) is provided with a cooling fan (7) for drawing outside air into the ventilation channel (11) and the flow guide channel (6).

2. The heat dissipating structure of the dry-type transformer according to claim 1, characterized in that: The outer wall of the insulating layer (1) is provided with a plurality of heat-conducting grooves (12) for accommodating heat-conducting parts (31), and the bottom of the insulating layer (1) is provided with a sink (13).

3. The heat dissipation structure of the dry-type transformer according to claim 2, characterized in that: The coil winding (2) is provided with an iron core (21), and the first guide shroud (4) and the second guide shroud (5) are provided with clearance grooves (8) to avoid the iron core (21).

4. The heat dissipation structure of the dry-type transformer according to claim 2, characterized in that: The outer wall of the first flow guide (4) is provided with a plurality of support feet (41), and the support feet (41) are connected and fixed to the second flow guide (5) by screws. The end face of the first flow guide (4) is provided with an abutment part (42), which abuts against the inner wall of the sink (13).

5. The heat dissipation structure of the dry-type transformer according to claim 1, characterized in that: The first guide shroud (4) is provided with a first guide portion (43) that is tapered toward the axis and is inclined, and the first guide portion (43) is provided with a plurality of first ventilation holes (44) at equal intervals.

6. The heat dissipation structure of the dry-type transformer according to claim 1, characterized in that: The second air guide (5) has a second ventilation hole (51) at its inner bottom, and a filter screen (52) is provided at the entrance of the second ventilation hole (51).

7. The heat dissipation structure of the dry-type transformer according to claim 1, characterized in that: The top of the insulating layer (1) is also provided with an insulating pad (14), the insulating pad (14) is provided with a pressure relief groove (141) to avoid the flow channel (6), and the top of the pressure relief groove (141) is provided with an inclined second flow guide (142).

8. The heat dissipation structure of the dry-type transformer according to claim 5, characterized in that: It also includes a substrate (9), which has a plurality of support portions (91) and is connected and fixed to the support feet (41) by screws, so that the second flow guide (5) and the substrate (9) maintain a distance for the gas medium to flow.

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