Transformer heat dissipation structure and transformer

Abstract

The utility model discloses a transformer heat dissipation structure and a transformer, the transformer heat dissipation structure comprises a plurality of wire cakes and support strips, the plurality of wire cakes are arranged up and down to form a coil main body, the support strips extend up and down, the support strips are provided with a plurality of clamping grooves, and the clamping grooves are arranged in the coil main body. A plurality of clamping grooves are formed in the coil body, the clamping grooves are sequentially arranged in the length direction of the supporting strip, the wire cakes are clamped to the clamping grooves of the supporting strip one by one, an air channel is formed between every two adjacent wire cakes, the coil body is sequentially divided into a first area, a third area and a fourth area from top to bottom, and the first area, the third area and the fourth area are each provided with a plurality of air channels. The vertical width of the air channel in the third area decreases from top to bottom, the vertical width of the air channel in the first area is larger than or equal to that of the air channel located at the top end of the third area, and the vertical width of the air channel in the fourth area is larger than that of the air channel in the first area. According to the utility model, the problem of overlarge local temperature rise allowance in the existing transformer can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer heat dissipation structure and a transformer. Background Art

[0002] As society pays more attention to industries such as energy conservation and charging piles, transformers play an increasingly important role. As engineering production pursues product performance and economy, transformer products with fans have gradually become the mainstream design. However, the air ducts of traditional transformers adopt the traditional equal spacing design. In fact, the transformer is affected by factors such as heat rise and fans, and the temperature at each position of the transformer is different. Setting all air ducts to the same size according to the temperature rise standard of the hottest point of the transformer will cause the problem of excessive local temperature rise margin of the transformer, which is low in cost performance. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a transformer heat dissipation structure and a transformer.

[0004] The solution of the utility model to solve the technical problem is:

[0005] A transformer heat dissipation structure includes a coil and a support bar, wherein a plurality of coils are provided, and the plurality of coils are arranged vertically to form a coil body, and the support bar is extended vertically, and a plurality of slots are provided on the support bar, and the plurality of slots are arranged sequentially along the length direction of the support bar, and the coils are snapped into the slots of the support bar one by one, and an airway is formed between two adjacent coils, and the coil body is divided into a first area, a third area, and a fourth area from top to bottom, and the first area, the third area, and the fourth area respectively have a plurality of airways, and the upper and lower widths of the airways in the third area decrease from top to bottom, and the upper and lower widths of the airways in the first area are greater than or equal to the airways located at the top of the third area, and the upper and lower widths of the airways in the fourth area are greater than the airways in the first area.

[0006] The utility model has at least the following beneficial effects: according to the actual temperature distribution of the transformer, the upper and lower widths of the airway in the fourth area are designed to be the largest size, which can effectively improve the heat dissipation effect of the components at this position; the upper and lower widths of the airway in the first area are designed to be larger, which can solve the temperature rise problem caused by heat rise in this area and meet the heat dissipation requirements of the upper part of the transformer; the upper and lower widths of the airway in the third area are designed to decrease from top to bottom, which can achieve good heat dissipation while avoiding design waste caused by excessive temperature rise margin, solve the problem of excessive local temperature rise margin of the transformer, and have higher cost performance.

[0007] As a further improvement of the above technical solution, the transformer heat dissipation structure also includes a wind shield, and a second area is provided between the first area and the third area. The upper and lower widths of the air duct in the second area are less than or equal to the air duct located at the bottom of the third area. The wind shield is connected to the periphery of the coil body and is provided in the second area.

[0008] The wind shield can concentrate the air volume to the air duct on the coil body, discharge the heat generated during the operation of the transformer to the outside of the transformer, and improve the cooling effect; due to the provision of the wind shield, the temperature near the wind shield is relatively low, and the upper and lower widths of the air duct in the second area are designed to be the smallest in the entire coil body, which can meet the temperature rise standard requirements while also solving the problem of excessive temperature rise margin at the local position near the wind shield, thereby reducing the loss of air volume.

[0009] As a further improvement of the above technical solution, the fourth area is set at a quarter of the lower part of the coil body, the second area and the first area are both set at a quarter of the upper part of the coil body, and the third area is set at the middle part of the coil body. In this way, the coils can be arranged reasonably according to the actual temperature distribution of the transformer, and the airways in different areas can be maximized while ensuring that the transformer meets the temperature rise standard requirements.

[0010] As a further improvement of the above technical solution, the wind shield is arranged in the middle of the second area, so as to ensure reasonable utilization of the wind volume on both sides of the wind shield.

[0011] As a further improvement of the above technical solution, four coils are arranged in the second area, two of which are arranged on the upper side of the wind shield, and the other two coils are arranged on the lower side of the wind shield. Such an arrangement can effectively utilize the air volume and reduce the air volume loss, and can also ensure that the temperature rise requirement of the transformer is met.

[0012] As a further improvement of the above technical solution, the ratio of the upper and lower widths of the air duct in the fourth region to the upper and lower widths of the air duct in the second region is less than or equal to 3.5. This arrangement can avoid excessive magnetic exposure of the transformer and avoid safety risks caused by increased transformer temperature.

[0013] As a further improvement of the above technical solution, the upper and lower widths of the airway in the third area are uniformly reduced from top to bottom in a gradient. Such a setting can not only meet the design requirements of the airway in the third area, but also facilitate the calculation of the position of the card slot in the support strip and the production of the support strip.

[0014] As a further improvement of the above technical solution, in the third area, the upper and lower widths of the air duct are reduced by 1 mm for every 50 mm reduction in the height of the air duct. This arrangement can ensure the balance between the structure and performance of the transformer.

[0015] As a further improvement of the above technical solution, there are multiple support bars, which are evenly arranged around the central axis of the coil body. This arrangement can provide a relatively uniform support force for the coil, so that the upper and lower widths of each position in the same airway remain consistent, ensuring that the heat dissipation of the transformer to the surroundings is consistent.

[0016] A transformer includes the transformer heat dissipation structure as described in any one of the above technical solutions. Due to the inclusion of the transformer heat dissipation structure in any one of the above technical solutions, the transformer has good heat dissipation performance, solves the problem of excessive local temperature rise margin, and is more economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present utility model, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of the transformer heat dissipation structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the coil arrangement of the transformer heat dissipation structure of the embodiment of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the support bar of the transformer heat dissipation structure of the embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of a transformer according to an embodiment of the utility model.

[0022] Figure numerals: 100, wire coil; 110, air duct; 200, support bar; 210, card slot; 300, first area; 400, second area; 500, third area; 600, fourth area; 700, windshield. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the present invention, descriptions of orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. The various technical features in the utility model can be combined interchangeably without conflicting with each other.

[0028] Reference Figure 1 , Figure 2 and Figure 3 The embodiment of the utility model proposes a transformer heat dissipation structure, including a coil 100 and a support bar 200, wherein the coil 100 is provided with a plurality of coils, and the support bar 200 is extended in the up-down direction, and the support bar 200 is in a comb-tooth shape. A plurality of slots 210 are provided on the support bar 200, and the slots 210 are arranged in the up-down direction. The support bar 200 is used to provide support force for the coil 100, and the coils 100 are clamped one by one in the slots 210 of the support bar 200.

[0029] It is understandable that, under the action of the slot 210 , a plurality of coils 100 are arranged in the up-and-down direction, and a gap is formed between two adjacent coils 100 , and the gap is the air channel 110 , through which the transformer dissipates heat.

[0030] It is worth noting that in this embodiment, a plurality of coils 100 are arranged up and down to form a coil body, and the coil body is divided into a first area 300, a third area 500 and a fourth area 600 from top to bottom, and each area has a number of air ducts 110. This embodiment independently designs the upper and lower widths of the air ducts 110 in each area.

[0031] The upper and lower widths of the air duct 110 in the third region 500 decrease from top to bottom. The upper and lower widths of the air duct 110 in the first region 300 are equal, and the upper and lower widths of the air duct 110 in the first region 300 are greater than or equal to the upper and lower widths of the air duct 110 at the top of the third region 500. The upper and lower widths of the air duct 110 in the fourth region 600 are equal, and the upper and lower widths of the air duct 110 in the fourth region 600 are greater than the upper and lower widths of the air duct 110 in the first region 300.

[0032] Through the temperature simulation analysis of the transformer, it can be known that the temperature of the fourth area 600 at the bottom of the coil body is the highest. This is because the fan, base and other equipment components are arranged at the bottom of the coil body, the transformer itself generates heat, and when the fan is working, the fan itself will also generate heat. Therefore, the air duct 110 of the fourth area 600 at the bottom of the coil body is designed to have the largest upper and lower width to achieve the effect of improving the heat dissipation effect.

[0033] The temperature of the first area 300 located at the upper part of the coil body is the second highest. Although the temperature here is not as high as the temperature in the fourth area 600, it is higher than the temperature of the third area 500 located in the middle of the coil body. Although this place is far away from the fan and will not be directly affected by the temperature rise caused by the heat of the fan, the first area 300 will also have a certain temperature rise due to the increase in heat.

[0034] The temperature of the third area 500 located in the middle of the coil body decreases from top to bottom, which is mainly affected by the air blown out by the fan located at the bottom of the coil body. The air blown out by the fan is conducive to the heat dissipation of the third area 500. Moreover, the third area 500 is less affected by the heat generated by the fan itself, and is closer to the fan outlet, so the heat dissipation effect is better, and the impact of heat rise is smaller.

[0035] Therefore, the temperature at the lower end of the third area 500 is lower than the temperature at the upper end of the third area 500. The upper and lower widths of the air duct 110 in the third area 500 are designed to decrease from top to bottom, which can achieve good heat dissipation while avoiding design waste caused by excessive temperature rise margin.

[0036] It can be understood that the upper and lower widths of the air duct 110 in each area are designed by the distance between each slot 210 on the support bar 200, that is, the upper and lower widths of the air duct 110 are determined by the thickness of the comb teeth on the comb-shaped support bar 200. The greater the thickness of the comb teeth between two adjacent slots 210, the greater the distance between two adjacent slots 210, the greater the gap between the two wire coils 100 connected to the two adjacent slots 210, and the greater the upper and lower widths of the air duct 110. The smaller the thickness of the comb teeth between two adjacent slots 210, the smaller the distance between two adjacent slots 210, the smaller the gap between the two wire coils 100 connected to the two adjacent slots 210, and the smaller the upper and lower widths of the air duct 110.

[0037] In some embodiments, the transformer heat dissipation structure also includes a wind shield 700, which is connected to the periphery of the coil body and is used to adjust the wind speed of the air blown out by the fan, and can concentrate the air volume to the air duct 110 on the coil body, discharge the heat generated during the operation of the transformer to the outside of the transformer, and improve the cooling effect.

[0038] The wind speed simulation analysis of the transformer with the wind shield 700 installed shows that the wind speed is relatively high near the wind shield 700, and the air duct 110 here only needs to meet the structural requirements of the transformer to achieve a good cooling effect. Therefore, in this embodiment, a second area 400 is further provided between the first area 300 and the third area 500, and the upper and lower widths of the air duct 110 in this area are the smallest in the entire coil body, which is less than or equal to the width of the air duct 110 at the bottom of the third area 500, and the wind shield 700 is provided at the second area 400.

[0039] It can be understood that the second area 400 is located above the coil body. Due to the rise in heat, when the wind shield 700 is not set, the temperature there is higher. The wind shield 700 is set here, which can make good use of the high wind speed air to discharge the heat there.

[0040] Such an arrangement can meet the temperature rise standard requirements, and can also solve the problem of excessive temperature rise margin in the vicinity of the wind shield 700, so as to rationally utilize the air volume generated by the fan and reduce the loss of air volume.

[0041] In this embodiment, the upper and lower widths of the airway 110 in the first area 300 are equal to the upper and lower widths of the airway 110 at the top of the third area 500, and the upper and lower widths of the airway 110 in the second area 400 are equal to the upper and lower widths of the airway 110 at the bottom of the third area 500.

[0042] According to the temperature simulation analysis of the transformer, in the transformer without the transformer heat dissipation structure of the present embodiment, the temperature of the position range near the lower quarter of the transformer is the highest, so the fourth area 600 is set at the lower quarter of the coil body; the temperature of the position range near the upper quarter of the transformer is the second highest, so the first area 300 and the second area 400 are set at the upper quarter of the coil body; and the position range between the upper and lower quarter dividing lines of the transformer occupies half of the transformer, and the temperature at this position decreases from top to bottom, so the third area 500 is set in the middle of the coil body. In this way, the coil 100 can be reasonably arranged according to the actual temperature of the transformer, and the air ducts 110 in different areas can be maximized while ensuring that the transformer meets the temperature rise standard requirements.

[0043] In order to ensure that the air volume on the upper and lower sides of the wind shield 700 can be reasonably utilized, in some embodiments, the wind shield 700 is arranged in the middle of the second area 400, that is, in the second area 400, the same number of wire coils 100 are arranged on the upper and lower sides of the wind shield 700.

[0044] Specifically in this embodiment, a total of four wire coils 100 are arranged in the second area 400, two of which are arranged on the upper side of the wind shield 700, and the other two wire coils 100 are arranged on the lower side of the wind shield 700. It can be understood that the wind shield 700 has a smaller influence range on the wind speed, and two wire coils 100 are arranged on the upper and lower sides of the wind shield 700, respectively, to form a small airway 110. The airways 110 on the upper and lower sides of the second area 400 are both larger airways 110, which can effectively utilize the air volume and reduce the air volume loss, and can also ensure that the temperature rise requirement of the transformer is met.

[0045] In the coil body, the ratio between the largest air channel 110 and the smallest air channel 110 is not greater than 3.5, and the upper and lower widths of the air channels 110 in the fourth region 600 are less than or equal to 3.5 times the upper and lower widths of the air channels 110 in the second region 400 .

[0046] It is understandable that if the ratio between the largest airway 110 and the smallest airway 110 exceeds 3.5, the transformer will be exposed to excessive magnetic field and the temperature will rise, which will cause the transformer to have safety risks. Therefore, limiting the upper and lower widths of the largest airway 110 to be less than or equal to 3.5 times the upper and lower widths of the smallest airway 110 can ensure the safety performance of the transformer.

[0047] In some embodiments, the upper and lower widths of the airway 110 in the third region 500 decrease uniformly from top to bottom according to a gradient, that is, the upper and lower widths of the airway 110 decrease by one unit distance for every unit height reduction of the position of the airway 110 .

[0048] Such an arrangement can not only meet the design requirements for the air duct 110 in the third area 500 , but is also conducive to calculating the position of the slot 210 in the support bar 200 and the production of the support bar 200 .

[0049] In this embodiment, in order to ensure the balance between the structure and performance of the transformer, in the third area 500, the air duct 110 is set such that the upper and lower widths of the air duct 110 decrease by 1 mm for every 50 mm reduction in height.

[0050] In this embodiment, the upper and lower widths of the air duct 110 in the first area 300 are set to 8 mm, the upper and lower widths of the air duct 110 in the second area 400 are set to 3 mm, the upper and lower widths of the air duct 110 in the third area 500 are set to 8 mm to 3 mm, and the upper and lower widths of the air duct 110 in the fourth area 600 are set to 10 mm.

[0051] In some embodiments, a plurality of support bars 200 are provided for supporting the wire cake 100 , and the plurality of support bars 200 can provide more stable support for the wire cake 100 .

[0052] In this embodiment, multiple support bars 200 are evenly arranged around the central axis of the coil body, which can provide relatively uniform support force for the coil, so that the upper and lower widths of each position in the same air duct 110 remain consistent, ensuring consistent heat dissipation of the transformer to the surroundings.

[0053] On the other hand, an embodiment of the utility model further proposes a transformer, which includes a transformer heat dissipation structure as proposed in any one of the above embodiments, has good heat dissipation performance and good economy.

[0054] In this embodiment, the transformer also includes a fan, a base and other structures, which has three transformer heat dissipation structures. The coil bodies of the three transformer heat dissipation structures are respectively installed on the same base through support bars 200. The three coil bodies are arranged side by side, and the height and structure of the three coil bodies remain consistent.

[0055] Reference Figure 4 In this embodiment, the three transformer heat dissipation structures use the same wind shield 700 to achieve wind speed control. The wind shield 700 is horizontally arranged and has three mounting holes. The three coil bodies are respectively inserted into the three mounting holes, and the wind shield 700 is respectively connected to the periphery of the three coil bodies.

[0056] Such an arrangement ensures that the temperature rise of the transformer meets the requirements, avoids excessive temperature rise margin in local locations, and is more conducive to the installation of the wind shield 700.

[0057] The structural arrangement of the embodiment of the utility model is scientific and reasonable, which improves the cost performance while ensuring the reliability, safety and stability of the transformer.

[0058] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A transformer heat dissipation structure, characterized in that: It includes a wire coil and a support strip, wherein a plurality of the wire coils are provided, and the plurality of the wire coils are arranged vertically to form a coil body, and the support strip is extended vertically, and a plurality of slots are provided on the support strip, and the plurality of slots are arranged sequentially along the length direction of the support strip, and the wire coils are snapped into the slots of the support strip one by one, and an airway is formed between two adjacent wire coils, and the coil body is divided into a first area, a third area, and a fourth area from top to bottom, and the first area, the third area, and the fourth area respectively have a plurality of the airways, and the upper and lower widths of the airways in the third area decrease from top to bottom, and the upper and lower widths of the airways in the first area are greater than or equal to the airways located at the top of the third area, and the upper and lower widths of the airways in the fourth area are greater than the airways in the first area.

2. The transformer heat dissipation structure according to claim 1, characterized in that: The transformer heat dissipation structure also includes a wind shield, and a second area is provided between the first area and the third area. The upper and lower widths of the air duct in the second area are less than or equal to the air duct located at the bottom end of the third area. The wind shield is connected to the outer periphery of the coil body and is provided in the second area.

3. The transformer heat dissipation structure according to claim 2, characterized in that: The fourth area is located at a quarter of the lower portion of the coil body, the second area and the first area are both located at a quarter of the upper portion of the coil body, and the third area is located at a middle portion of the coil body.

4. The transformer heat dissipation structure according to claim 2, characterized in that: The wind shield is arranged in the middle of the second area.

5. The transformer heat dissipation structure according to claim 4, characterized in that: The second area is provided with four coils, wherein two coils are arranged on the upper side of the wind shield, and the other two coils are arranged on the lower side of the wind shield.

6. The transformer heat dissipation structure according to claim 2, characterized in that: A ratio of a vertical width of the air passage in the fourth region to a vertical width of the air passage in the second region is less than or equal to 3.

5.

7. The transformer heat dissipation structure according to claim 1, characterized in that: The upper and lower widths of the airway in the third region are uniformly reduced from top to bottom according to a gradient.

8. The transformer heat dissipation structure according to claim 7, characterized in that: In the third area, the upper and lower widths of the airway are reduced by 1 mm for every 50 mm reduction in the height of the airway.

9. The transformer heat dissipation structure according to claim 1, characterized in that: There are a plurality of support bars, and the plurality of support bars are evenly arranged around the circumference of the central axis of the coil body.

10. A transformer, comprising the transformer heat dissipation structure according to any one of claims 1 to 9.

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