An improved isolation transformer

Abstract

The utility model discloses an improved isolation transformer, including installation frame, setting coil winding on installation frame, still be provided with heat dissipation subassembly on installation frame, and heat dissipation subassembly includes the even gas tank in coil winding bottom, and the bottom of even gas tank is provided with heat dissipation fan, and the top of even gas tank is provided with outer heat dissipation ring, partition heat dissipation cover and heat dissipation core cover, and outer heat dissipation ring is located coil winding outside, and partition heat dissipation cover is located coil winding inside. By placing even gas tank in coil winding bottom, the heat dissipation fan of collocation bottom, can let airflow first in even gas tank buffering and distribution, then even delivery to outer heat dissipation ring, partition heat dissipation cover and heat dissipation core cover. Three heat dissipation parts form three -dimensional surrounding type heat dissipation from the outside, inside and inside of coil winding respectively, realized to coil winding all -round, no dead angle heat dissipation cover, avoided the local overheating problem of single direction heat dissipation, improved heat dissipation efficiency greatly, guarantee transformer in long time operation stability.

Description

Technical Field

[0001] This utility model belongs to the field of isolation transformer technology, and in particular relates to an improved isolation transformer. Background Technology

[0002] In power systems and electrical equipment, isolation transformers, as key devices for achieving electrical isolation and voltage conversion, are widely used in industrial control, medical equipment, communication systems, and other fields. Their core working principle involves energy transfer through electromagnetic induction between the primary and secondary coils. During this process, the coil windings generate a large amount of heat due to the current flowing through them. If this heat cannot be dissipated in time, the transformer temperature will rise, not only reducing its efficiency and shortening its service life, but also potentially causing insulation aging, short circuits, and other faults, affecting the stable operation of the entire electrical system.

[0003] Traditional isolation transformers typically employ a single heat dissipation method, such as using heat sinks on the outer casing for natural cooling or adding a fan on one side for forced air cooling. This heat dissipation structure has significant limitations: natural cooling is inefficient and cannot meet the heat dissipation requirements of high-power transformers; while forced air cooling in one direction often only dissipates heat to a localized area of ​​the coil windings, resulting in uneven heat dissipation between the inner and outer sides of the coils and between different coil layers, forming localized high-temperature zones.

[0004] Meanwhile, in traditional isolation transformers, the primary and secondary coils are often wound directly together, lacking an effective heat dissipation and isolation structure, making it easy for heat to accumulate between the two coils. Furthermore, some isolation transformers use wire welding for tap connections, resulting in a messy wire layout, occupying a large amount of space, and having high contact resistance at the connection points, easily generating additional heat. At the same time, the insulation protection of the wires is difficult to guarantee adequately, posing safety hazards.

[0005] In addition, the traditional isolation transformer has poor coordination between the mounting frame and the heat dissipation components, and the installation stability of the heat dissipation components is insufficient. Under long-term operation or vibration environment, it is easy to loosen or shift, which affects the continuity of heat dissipation effect and the overall reliability of the structure.

[0006] In view of the problems of traditional isolation transformers in terms of heat dissipation efficiency, heat dissipation uniformity, coil isolation, tap connection and structural stability, there is an urgent need for an isolation transformer that optimizes and improves the heat dissipation structure, coil layout, connection method and overall frame design to improve its heat dissipation performance, working stability and service life.

[0007] Therefore, we need to design an improved isolation transformer to solve these problems. Utility Model Content

[0008] The problem to be solved by this utility model is to provide an improved isolation transformer.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An improved isolation transformer includes a mounting frame on which a coil winding is disposed. A heat dissipation assembly is also disposed on the mounting frame. The heat dissipation assembly includes a gas equalization box located at the bottom of the coil winding, a heat dissipation fan disposed at the bottom of the gas equalization box, and an outer heat dissipation ring, a separating heat dissipation sleeve, and a heat dissipation core sleeve disposed at the top of the gas equalization box. The outer heat dissipation ring is located outside the coil winding, the separating heat dissipation sleeve is located inside the coil winding, and the heat dissipation core sleeve is located inside the coil winding. All three components—the outer heat dissipation ring, the separating heat dissipation sleeve, and the heat dissipation core sleeve—are connected to the gas equalization box.

[0010] Preferably, the outer heat dissipation ring is provided with a plurality of outgoing air holes, which are evenly distributed around the circumference of the coil winding and are all connected to the interior of the air equalization box; the side wall of the partition heat dissipation sleeve is provided with a plurality of air channels along the axial direction, which are evenly distributed around the circumference of the partition heat dissipation sleeve and are also connected to the interior of the air equalization box; the heat dissipation core sleeve is provided with an air cavity inside, which is connected to the air equalization box, and the side wall of the heat dissipation core sleeve near the coil winding is provided with a plurality of internal air outlet holes, which are all connected to the air cavity.

[0011] This configuration, with the air vents evenly distributed circumferentially around the coil windings, ensures that the airflow from the air distribution box is uniformly blown out along the outer circumference of the coil, guaranteeing balanced heat dissipation across all outer parts. The axial air channels of the heat dissipation sleeve, also evenly distributed circumferentially, allow airflow to flow axially along the inside of the coil, quickly carrying away internal axial heat and preventing heat buildup. The air cavity of the heat dissipation core sleeve first stores airflow, then blows it directly to the inside of the coil through the inner air outlet, enhancing the targeted nature of internal heat dissipation. These three elements, connected to the air distribution box, form a combined internal and external, multi-dimensional heat dissipation path, significantly improving the heat dissipation effect.

[0012] Preferably, the coil winding includes a primary coil and a secondary coil, and the heat dissipation sleeve is located between the primary coil and the secondary coil, and is in contact with both the primary coil and the secondary coil respectively.

[0013] This configuration, with the heat-dissipating sleeve positioned tightly between the primary and secondary coils, not only directly absorbs the heat generated during operation and efficiently dissipates it through its own air channels, but also enhances heat transfer through the tightly fitted structure, improving the heat dissipation efficiency between the two coils. Simultaneously, the heat-dissipating sleeve also provides physical isolation between the primary and secondary coils, enhancing the stability of the coil structure and achieving the dual functions of heat dissipation and isolation.

[0014] Preferably, the mounting frame includes a base, an iron core, and a top frame. One end of the iron core is fixedly connected to the base, and the other end is fixedly connected to the top frame. The heat dissipation core sleeve is fixedly fitted onto the iron core.

[0015] This configuration, with the base, iron core, and top frame forming a stable mounting framework, provides a stable foundation for components such as the coil windings by fixing both ends of the iron core to the base and top frame respectively, enhancing the overall structure's vibration and impact resistance. The heat dissipation sleeve is fixedly fitted onto the iron core, ensuring its secure installation while allowing it to be close to the core heat-generating area inside the coil. Simultaneously, the heat from the iron core can be quickly dissipated through the heat dissipation sleeve, achieving synergistic heat dissipation between the iron core and the coil.

[0016] Preferably, an insulating plate is fixedly disposed on the mounting frame, and a plurality of primary side taps and a plurality of secondary side taps are fixedly disposed on the insulating plate. The plurality of secondary side taps are arranged in an arc shape. A plurality of copper busbars are also embedded in the insulating plate. The copper busbars connect the primary side taps to the primary coil and the secondary side taps to the secondary coil.

[0017] This configuration provides a stable mounting base for the primary and secondary side taps, preventing leakage or short circuits and ensuring electrical safety. The arc-shaped arrangement of the secondary side taps optimizes the spatial layout, making the tap distribution more reasonable and facilitating wiring operations and subsequent maintenance. The copper busbars embedded in the insulation board connect the taps and coils. Compared with traditional wires, copper busbars have better conductivity and lower resistance, reducing energy loss, and also have better heat dissipation and a more secure connection. At the same time, the embedded copper busbar design saves space, making the overall structure more compact and improving the transformer's operating efficiency and safety.

[0018] Preferably, the air distribution box is fixed between the coil winding and the base, the cooling fan is fixed on the base, and the output end of the cooling fan is connected to the air distribution box through a connecting pipe.

[0019] This configuration fixes the air distribution box between the coil windings and the base, placing it close to the core heat dissipation area while leveraging the base's support to enhance its stability. The cooling fan is fixed to the base and connected to the air distribution box via a connecting pipe, resulting in a more stable airflow path, reduced airflow leakage, and improved fan efficiency. Simultaneously, the base serves as a shared mounting foundation, ensuring a more secure installation of the air distribution box and cooling fan, reducing vibration and noise during operation, and enhancing the overall structural reliability.

[0020] Furthermore, a support block is fixedly installed inside the gas equalization box, and a through hole is provided through the support block.

[0021] This design enhances the structural strength of the air distribution box through support blocks, preventing deformation under airflow pressure or external vibration and ensuring long-term stable operation. The through holes on the support blocks do not obstruct airflow, ensuring smooth airflow through the air distribution box to each heat dissipation component. This strengthens structural stability without affecting the normal delivery of cooling airflow, achieving a balance between structural strength and heat dissipation efficiency.

[0022] The advantages and positive effects of this utility model are: This invention places the air distribution box at the bottom of the coil winding, along with a cooling fan at the bottom. This allows the airflow to be buffered and distributed within the air distribution box before being evenly delivered to the outer cooling ring, the separating cooling sleeve, and the cooling core sleeve. These three cooling components form a three-dimensional, enveloping cooling system from the outside, inside, and inner sides of the coil winding, respectively. This achieves comprehensive, all-around cooling coverage of the coil winding, avoiding localized overheating problems caused by unidirectional cooling, significantly improving cooling efficiency, and ensuring the stability of the transformer during long-term operation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the distribution structure of the outer heat dissipation ring, the partition heat dissipation sleeve, and the heat dissipation core sleeve of this utility model; Figure 3 This is a schematic diagram of the connection structure between the cooling fan and the air distribution box in the left view of this utility model.

[0025] The annotations in the attached figures are explained as follows: 1. Base; 2. Cooling fan; 3. Air distribution box; 4. Outer cooling ring; 5. Outer air vent; 6. Divider cooling sleeve; 7. Air duct; 8. Cooling core sleeve; 9. Inner air vent; 10. Iron core; 11. Top frame; 12. Copper busbar; 13. Primary side tap; 14. Secondary side tap; 15. Insulation board; 16. Secondary coil; 17. Primary coil; 18. Air cavity; 19. Pressure frame; 20. Connecting pipe; 21. Support block; 22. Through hole. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings: Example 1: As Figures 1-3 As shown, an improved isolation transformer includes a mounting frame on which a coil winding is mounted. A heat dissipation assembly is also mounted on the mounting frame. The heat dissipation assembly includes a gas equalization box 3 located at the bottom of the coil winding. A heat dissipation fan 2 is mounted at the bottom of the gas equalization box 3. An outer heat dissipation ring 4, a separating heat dissipation sleeve 6, and a heat dissipation core sleeve 8 are mounted on the top of the gas equalization box 3. The outer heat dissipation ring 4 is located outside the coil winding, the separating heat dissipation sleeve 6 is located inside the coil winding, and the heat dissipation core sleeve 8 is located inside the coil winding. The outer heat dissipation ring 4, the separating heat dissipation sleeve 6, and the heat dissipation core sleeve 8 are all connected to the gas equalization box 3.

[0029] The outer heat dissipation ring 4 is provided with several outgoing air holes 5, which are evenly distributed around the circumference of the coil winding, and all of the outgoing air holes 5 are connected to the interior of the air equalization box 3; the side wall of the partition heat dissipation sleeve 6 is provided with several air channels 7 along the axial direction, which are evenly distributed around the circumference of the partition heat dissipation sleeve 6, and the air channels 7 are also connected to the interior of the air equalization box 3; the heat dissipation core sleeve 8 is provided with an air cavity 18 inside, which is connected to the air equalization box 3, and the side wall of the heat dissipation core sleeve 8 near the coil winding is provided with several internal air outlet holes 9, which are all connected to the air cavity 18.

[0030] The coil winding includes a primary coil 17 and a secondary coil 16. The heat dissipation sleeve 6 is located between the primary coil 17 and the secondary coil 16, and is in contact with both the primary coil 17 and the secondary coil 16.

[0031] The mounting frame includes a base 1, an iron core 10, and a top frame 11. One end of the iron core 10 is fixedly connected to the base 1, and the other end is fixedly connected to the top frame 11. The heat dissipation core sleeve 8 is fixedly fitted onto the iron core 10.

[0032] An insulating plate 15 is fixedly installed on the mounting frame. Several primary side taps 13 and several secondary side taps 14 are fixedly installed on the insulating plate 15. The secondary side taps 14 are arranged in an arc shape. Several copper busbars 12 are also embedded in the insulating plate 15. The copper busbars 12 connect the primary side taps 13 to the primary coil 17 and connect the secondary side taps 14 to the secondary coil 16.

[0033] The air equalization box 3 is fixed between the coil winding and the base 1, the cooling fan 2 is fixed on the base 1, and the output end of the cooling fan 2 is connected to the air equalization box 3 through the connecting pipe 20.

[0034] A support block 21 is fixedly installed inside the air distribution box 3, and a through hole 22 is provided through the support block 21.

[0035] The heat dissipation assembly is centered around the air distribution box 3. The airflow generated by the cooling fan 2 is distributed through the air distribution box 3 to the outer heat dissipation ring 4, the partition heat dissipation sleeve 6, and the heat dissipation core sleeve 8. The outer heat dissipation ring 4, the partition heat dissipation sleeve 6, and the heat dissipation core sleeve 8 act on the outer, inner, and inner sides of the coil winding, respectively. The connection between the three and the air distribution box 3 forms a heat dissipation path covering the entire area of ​​the coil winding.

[0036] The exhaust vents 5 of the outer heat dissipation ring 4, the air ducts 7 of the partition heat dissipation sleeve 6, the air cavity 18 of the heat dissipation core sleeve 8, and the inner exhaust vents 9 all obtain airflow through communication with the air equalization box 3. The exhaust vents 5 are distributed circumferentially along the coil winding, the air ducts 7 are distributed circumferentially along the partition heat dissipation sleeve 6, and the inner exhaust vents 9 are connected to the air equalization box 3 through the air cavity 18. The above layout enables the airflow to form a multi-dimensional flow along the radial and axial directions of the coil winding.

[0037] The heat dissipation sleeve 6 is located between the primary coil 17 and the secondary coil 16. Its close contact with the two coils provides a heat dissipation interface close to the heat source for the airflow delivered by the air passage 7, and also achieves structural separation between the primary coil 17 and the secondary coil 16 through physical isolation.

[0038] The base 1, iron core 10, and top frame 11 of the mounting frame constitute a rigid support system. The two ends of the iron core 10 are connected to the base 1 and the top frame 11 respectively, forming a support shaft that runs through the transformer. A pressure frame 19 is also installed on the top frame 11, which can increase the contact area between the top frame 11 and the winding coil, thereby fixing the position of the winding coil. The heat dissipation core sleeve 8 is fitted onto the iron core 10, and is positioned with the support of the iron core 10. At the same time, through the conduction path of the iron core 10, its heat dissipation effect is extended to the core components of the transformer.

[0039] The insulating plate 15 is fixed to the mounting frame, providing a mounting carrier for the primary side tap 13 and the secondary side tap 14. The copper busbar 12 is embedded inside the insulating plate 15, with one end connecting the primary side tap 13 to the primary coil 17, and the other end connecting the secondary side tap 14 to the secondary coil 16, forming a rigid path for current conduction. The arc-shaped arrangement of the secondary side taps 14, in conjunction with the connection method of the copper busbar 12, optimizes the layout of the current conduction path.

[0040] The air distribution box 3 is fixed between the coil winding and the base 1, and the base 1 also provides an installation reference for the cooling fan 2. The output end of the cooling fan 2 is connected to the air distribution box 3 through the connecting pipe 20, forming a closed airflow channel from the fan to the air distribution box 3, ensuring that all airflow enters the air distribution box 3 for distribution.

[0041] The support block 21 inside the air distribution box 3 enhances the overall rigidity of the air distribution box 3 through its own structure. Its through hole 22 ensures that the airflow can pass through the support block 21 and continue to flow inside the air distribution box 3, thus maintaining the structural stability of the air distribution box 3 without hindering the airflow distribution.

[0042] The working process of this embodiment is as follows: When the isolation transformer is working, the cooling fan 2 will start and send the low-temperature airflow into the air distribution box 3 through the connecting pipe 20. Part of the airflow entering the air distribution box 3 will flow from the outlet air hole 5 on the outer heat dissipation ring 4 to the secondary coil 16 to dissipate heat from the secondary coil 16; another part will enter the air channel 7 on the separating heat dissipation sleeve 6. Since the separating heat dissipation sleeve 6 is in close contact with both the primary coil 17 and the secondary coil 16, the airflow flowing through the air channel 7 will dissipate heat from both the primary coil 17 and the secondary coil 16 at the same time; the last part of the airflow will enter the air cavity 18 on the heat dissipation core sleeve 8, and then flow from the inner air outlet 9 to the inner wall of the primary coil 17 to dissipate heat. This achieves all-round, no-dead-angle heat dissipation coverage of the coil winding, avoids the problem of local overheating caused by heat dissipation in one direction, greatly improves the heat dissipation efficiency, and ensures the stability of the transformer during long-term operation.

[0043] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. An improved isolation transformer, comprising a mounting frame on which coil windings are disposed, characterized in that: The mounting frame is also provided with a heat dissipation assembly, which includes an air distribution box (3) located at the bottom of the coil winding. A heat dissipation fan (2) is provided at the bottom of the air distribution box (3). An outer heat dissipation ring (4), a partition heat dissipation sleeve (6), and a heat dissipation core sleeve (8) are provided at the top of the air distribution box (3). The outer heat dissipation ring (4) is located outside the coil winding, the partition heat dissipation sleeve (6) is located inside the coil winding, and the heat dissipation core sleeve (8) is located inside the coil winding. The outer heat dissipation ring (4), the partition heat dissipation sleeve (6), and the heat dissipation core sleeve (8) are all connected to the air distribution box (3).

2. The improved isolation transformer of claim 1, wherein: The outer heat dissipation ring (4) is provided with a plurality of outgoing air holes (5), which are evenly distributed around the circumference of the coil winding, and all of the plurality of outgoing air holes (5) are connected to the interior of the air equalization box (3). The partition heat dissipation sleeve (6) has a plurality of air channels (7) arranged along the axial direction on its side wall. The plurality of air channels (7) are evenly distributed along the circumference of the partition heat dissipation sleeve (6), and the plurality of air channels (7) are also connected to the interior of the air distribution box (3). The heat dissipation core sleeve (8) has an internal air cavity (18) which is connected to the air distribution box (3). Several internal air outlet holes (9) are provided on the side wall of the heat dissipation core sleeve (8) near the coil winding, and the several internal air outlet holes (9) are all connected to the air cavity (18).

3. An improved isolation transformer according to claim 1, characterized in that: The coil winding includes a primary coil (17) and a secondary coil (16). The heat dissipation sleeve (6) is located between the primary coil (17) and the secondary coil (16), and is in contact with both the primary coil (17) and the secondary coil (16).

4. The improved isolation transformer of claim 1, wherein: The mounting frame includes a base (1), an iron core (10), and a top frame (11). One end of the iron core (10) is fixedly connected to the base (1), and the other end is fixedly connected to the top frame (11). The heat dissipation core sleeve (8) is fixedly fitted onto the iron core (10).

5. The improved isolation transformer of claim 3, wherein: An insulating plate (15) is fixedly installed on the mounting frame. Several primary side taps (13) and several secondary side taps (14) are fixedly installed on the insulating plate (15). The several secondary side taps (14) are arranged in an arc shape. Several copper busbars (12) are also embedded in the insulating plate (15). The copper busbars (12) connect the primary side taps (13) to the primary coil (17) and connect the secondary side taps (14) to the secondary coil (16).

6. An improved isolation transformer as claimed in claim 4, wherein: The air equalization box (3) is fixed between the coil winding and the base (1), the cooling fan (2) is fixed on the base (1), and the output end of the cooling fan (2) is connected to the air equalization box (3) through the connecting pipe (20).

7. An improved isolation transformer as claimed in claim 6, wherein: A support block (21) is fixedly installed inside the gas equalization box (3), and a through hole (22) is provided through the support block (21).

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