High-frequency transformer with heat dissipation structure

Abstract

The utility model relates to a high-frequency transformer with a heat dissipation structure, and belongs to the technical field of transformers, the high-frequency transformer comprises a base, a transformer body and an oil tank structure, the transformer body and the oil tank structure are arranged on the base, and the transformer body comprises an iron core winding fixedly installed on the base and an insulation structure located outside the iron core winding; and a cooling device is arranged outside the oil tank structure. According to the high-frequency transformer with the heat dissipation structure, the transformer body is arranged in the oil tank, the oil tank is filled with the transformer oil, so that the transformer body is in uniform contact with the transformer oil, an insulation structure is arranged to prevent the transformer body from being in contact with the transformer oil, and in addition, an oil conservator is arranged to communicate with the oil tank; lubricating oil in the oil tank is always kept in a full state, long-time use can be maintained in cooperation with the respirator, the external heat dissipation structure is arranged to communicate with the oil tank, the contact temperature can be dissipated after transformer oil makes contact with an iron core winding, and the heat dissipation uniformity of the transformer is improved.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a high-frequency transformer with a heat dissipation structure. Background Art

[0002] A high-frequency transformer is a transformer specifically designed for high-frequency power conversion. It is typically used in switching power supplies, radio frequency applications, and other situations requiring high-frequency signal transmission. High-frequency transformers typically use ferrite or other high-frequency magnetic materials as the core to reduce energy loss at high frequencies. Due to the characteristics of high-frequency signals, winding design usually needs to consider the effects of inductance, capacitance, and resistance to ensure good performance.

[0003] High-frequency transformers will cause heat generation due to high-frequency operation, so heat dissipation design needs to be considered. At present, high-frequency transformers generally use external heat sinks for contact heat dissipation. The heat sinks are usually in contact with the high-frequency transformer housing, which also makes it easy for temperature to accumulate outside the winding of the high-frequency transformer. There is room for improvement. In this regard, a high-frequency transformer with a heat dissipation structure is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present application provides a high-frequency transformer with a heat dissipation structure, which has the main structure of an oil-immersed transformer and uses transformer oil as a medium to enhance the heat exchange effect, improve the uniformity of heat dissipation, and reduce local heating.

[0005] To achieve the above objectives, the present application provides the following technical solution: a high-frequency transformer with a heat dissipation structure, comprising a base, a transformer body disposed on the base, and an oil tank structure, wherein the transformer body comprises an iron core winding fixedly mounted on the base and an insulating structure located outside the iron core winding, and a cooling device is disposed outside the oil tank structure;

[0006] The oil tank structure includes an oil tank located outside the transformer body, an oil conservator connected to the oil tank, and a breather connected to the oil conservator;

[0007] The cooling device includes a cooling pipe connected to the oil tank, an oil pump connected to the cooling pipe, and a cooling box.

[0008] Furthermore, there is transformer oil in the inner cavities of the oil tank and the oil conservator, and a bracket is fixedly installed on the outside of the oil tank. The oil conservator is fixed to the side of the oil tank through the bracket, and the oil conservator is higher than the connecting pipe between the oil tank and the oil conservator.

[0009] Furthermore, the insulation structure includes a main insulation wrapped and fixed to the outside of the core winding, an inter-turn insulation of the winding located on the main insulation, and an oil seal.

[0010] Furthermore, the outside of the oil tank is also connected to a shunt switch and an insulating terminal for completing the normal electrical connection of the transformer. The shunt switch and the insulating terminal are both insulated from each other and connected to the core winding.

[0011] Furthermore, the cooling pipes include a plurality of cooling pipes, and the plurality of cooling pipes are connected to the inlet and outlet of the oil pump to form a circulation.

[0012] Furthermore, a heat sink extending to the outside of the cooling box is fixedly installed inside the cooling box, and a fan is fixedly installed inside the cooling box.

[0013] Furthermore, the cooling pipe runs through the cooling box and is externally provided with a pressure valve, and the top of the oil tank is also connected to a pressure relief protector.

[0014] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0015] The high-frequency transformer with a heat dissipation structure has an oil tank built into the transformer body, and transformer oil is filled in the oil tank, so that the transformer body is evenly in contact with the transformer oil. An insulating structure is provided to prevent the transformer body from contacting the transformer oil. In addition, an oil storage cabinet is provided in communication with the oil tank, so that the lubricating oil in the oil tank is always kept full. In combination with a respirator, the transformer can be used for a long time. An external heat dissipation structure is provided in communication with the oil tank, so that the transformer oil can dissipate the contact temperature after contacting the iron core winding, thereby improving the heat dissipation uniformity of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of this application;

[0017] Figure 2 This is a three-dimensional diagram of the structure of the transformer body of this application;

[0018] Figure 3 This is a schematic diagram of the structure of the cooling pipe of this application;

[0019] Figure 4 This is a structural diagram of the fuel tank for this application.

[0020] In the figure: 1. Base; 2. Oil tank; 3. Core winding; 4. Main insulation; 5. Winding inter-turn insulation; 6. Oil seal; 7. Oil storage cabinet; 8. Bracket; 9. Breather; 10. Cooling pipe; 11. Cooling box; 12. Fan; 13. Heat sink; 14. Pressure valve; 15. Oil pump; 16. Shunt switch; 17. Pressure relief protector; 18. Insulated terminal. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] See also Figures 1 to 4 In this embodiment, a high-frequency transformer with a heat dissipation structure includes a base 1, a transformer body and an oil tank structure arranged on the base 1, and a cooling device is arranged outside the oil tank structure.

[0023] In this embodiment, the transformer body includes an iron core winding 3 fixedly mounted on a base 1 and an insulating structure located outside the iron core winding 3. The insulating structure can prevent the iron core winding 3 from contacting transformer oil.

[0024] Specifically, the iron core winding 3 is the basic component of the transformer. The iron core is divided into two parts: the iron core and the iron yoke. The winding is placed on the iron core, and the iron yoke connects the iron core to form a closed magnetic circuit. The winding is made of copper wire or aluminum wire wrapped with insulating paper.

[0025] The oil tank structure includes an oil tank 2 located outside the transformer body, an oil conservator 7 connected to the oil tank 2 , and a breather 9 connected to the oil conservator 7 .

[0026] Preferably, there is transformer oil in the inner cavities of the oil tank 2 and the oil conservator 7, and a bracket 8 is fixedly installed on the outside of the oil tank 2. The oil conservator 7 is fixed to the side of the oil tank 2 through the bracket 8, and the oil conservator 7 is higher than the connecting pipe between the oil tank 2 and the oil conservator 7.

[0027] This design allows the transformer oil in the oil tank 2 to fill the entire inner cavity of the oil tank 2 , while a certain amount of air can be reserved in the oil conservator 7 .

[0028] It should be noted that the insulation structure includes a main insulation 4 wrapped and fixed on the outside of the core winding 3, a winding inter-turn insulation 5 and an oil seal 6 located on the main insulation 4. The main insulation 4 is an insulating part between windings and between windings and the core and oil tank. The winding inter-turn insulation 5 is an insulating part used for interlayer insulation between winding turns. The oil seal 6 is a seal used to extend from the upper end of the core winding 3 to the external wiring part.

[0029] In this embodiment, the respirator 9 is made of conventional components, and is composed of a seal, a container, and a desiccant. The desiccant is located in the container and can absorb moisture in the air and filter the air.

[0030] In a specific implementation, when the transformer oil expands due to heating or contracts due to cooling, the lubricating oil in the oil tank 2 is stored and replenished through the oil conservator 7. Therefore, the outside air will enter the oil conservator 7 through the respirator 9 to ensure that the air entering the oil conservator 7 is clean and dry.

[0031] In this embodiment, a shunt switch 16 and an insulating terminal 18 are further connected to the outside of the oil tank 2 for completing the normal electrical connection of the transformer. The shunt switch 16 and the insulating terminal 18 are both insulated from each other and connected to the core winding 3.

[0032] In this embodiment, the cooling device includes a cooling pipe 10 connected to the oil tank 2, an oil pump 15 connected to the cooling pipe 10, and a cooling box 11, wherein the cooling pipe 10 includes a plurality of cooling pipes, and the inlet and outlet of the plurality of cooling pipes 10 and the oil pump 15 are connected to form a circulation, so that the transformer oil can flow through the drive of the oil pump 15, thereby improving the uniformity of heat distribution.

[0033] In this embodiment, a heat sink 13 extending to the outside of the cooling box 11 is fixedly installed inside the cooling box 11 , and a fan 12 is fixedly installed inside the cooling box 11 for blowing air and dissipating heat.

[0034] It should be noted that the cooling pipe 10 passes through the cooling box 11 and is externally provided with a pressure valve 14 . The top of the oil tank 2 is also connected to a pressure relief protector 17 for releasing pressure to protect the oil tank 2 under high pressure.

[0035] The working principle of the above embodiment is:

[0036] By controlling the oil pump 15, the transformer oil is made to flow evenly in the oil tank 2 and the cooling pipe 10. The transformer oil that is in direct contact with the core winding through the insulation structure flows through the cooling pipe 10 to the cooling box 11. Under the encouragement of the fan 12, the transformer oil in the cooling pipe 10 is dissipated through the heat sink 13 to ensure that the overall temperature of the transformer oil in the oil tank 2 remains stable.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0038] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-frequency transformer with a heat dissipation structure, comprising a base (1), a transformer body and an oil tank structure arranged on the base (1), characterized in that: The transformer body comprises an iron core winding (3) fixedly mounted on the base (1) and an insulating structure located outside the iron core winding (3); a cooling device is provided outside the oil tank structure; The oil tank structure comprises an oil tank (2) located outside the transformer body, an oil conservator (7) connected to the oil tank (2), and a breather (9) connected to the oil conservator (7); The cooling device comprises a cooling pipe (10) connected to the oil tank (2), an oil pump (15) connected to the cooling pipe (10), and a cooling box (11).

2. The high-frequency transformer with a heat dissipation structure according to claim 1, characterized in that: Transformer oil is contained in the inner cavities of the oil tank (2) and the oil storage cabinet (7), and a bracket (8) is fixedly mounted on the outside of the oil tank (2). The oil storage cabinet (7) is fixed to the side of the oil tank (2) through the bracket (8), and the oil storage cabinet (7) is higher than the connecting pipe between the oil tank (2) and the oil storage cabinet (7).

3. The high-frequency transformer with a heat dissipation structure according to claim 1, characterized in that: The insulation structure comprises a main insulation (4) wrapped and fixed outside the iron core winding (3), a winding inter-turn insulation (5) located on the main insulation (4), and an oil seal (6).

4. The high-frequency transformer with a heat dissipation structure according to claim 1, characterized in that: The outside of the oil tank (2) is also connected to a shunt switch (16) and an insulating terminal (18) for completing normal electrical connection of the transformer. The shunt switch (16) and the insulating terminal (18) are both insulated from each other and connected to the iron core winding (3).

5. The high-frequency transformer with a heat dissipation structure according to claim 1, characterized in that: The cooling pipes (10) include a plurality of cooling pipes (10), and the plurality of cooling pipes (10) are connected to the inlet and outlet of the oil pump (15) to form a circulation.

6. The high-frequency transformer with a heat dissipation structure according to claim 5, characterized in that: A heat sink (13) extending to the outside of the cooling box (11) is also fixedly installed inside the cooling box (11), and a fan (12) is fixedly installed inside the cooling box (11).

7. The high-frequency transformer with a heat dissipation structure according to claim 1, characterized in that: The cooling pipe (10) passes through the cooling box (11) and is externally provided with a pressure valve (14). The top of the oil tank (2) is also connected to a pressure relief protector (17).

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