Aluminum radiator structure of power transformer

Abstract

The invention relates to the technical field of transformer heat dissipation, in particular to an aluminum radiator structure of a power transformer, which comprises a plurality of heat dissipation units. Each heat dissipation unit comprises a liquid inlet pipe, a liquid outlet pipe, a heat dissipation plate and a connecting structure. The extending direction of the heat dissipation plate flow channel and the axial direction of the liquid inlet pipe are obliquely arranged in the same plane at the preset first included angle, the heat transfer medium is guided to flow along the inclined path, the heat transfer medium close to the transformer flows in the direction away from the transformer, and the heat transfer medium away from the transformer flows in the direction close to the transformer. Therefore, each heat dissipation plate can fully participate in heat exchange, the overall heat dissipation efficiency of the heat dissipation unit is improved, and the oil temperature of the transformer is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer heat dissipation, in particular to an aluminum heat sink structure of a power transformer, which is applied to the cooling system of power facilities such as power transformers, vehicle-mounted mobile substations and energy storage transformers. BACKGROUND

[0002] The sheet-type heat sink is a core heat dissipation component of power equipment such as transformers, which is mainly used to dissipate the heat generated by the core and winding during the operation of the transformer, so as to avoid the aging and insulation failure of the equipment due to high temperature, and to ensure the stable power transmission. The hot oil in the transformer flows into the heat sink from the oil outlet at the top of the transformer, expands the heat dissipation area through the fin structure of the heat sink, and transmits the heat in the oil to the outside by natural convection or forced air cooling. The density of the cooled oil increases, and it flows back to the oil tank of the transformer along the bottom of the heat sink, forming a circulating heat dissipation, continuously reducing the internal oil temperature of the equipment, and maintaining the safe operation of the transformer within the rated temperature range.

[0003] However, due to the different distances between multiple heat dissipation fins and the transformer, the heat distribution is uneven when the hot oil circulates. The heat dissipation fins close to the transformer concentrate on heat acceptance but have limited heat exchange space, and the temperature drop is small; the heat dissipation fins far away from the transformer have sufficient exchange conditions, and the temperature drop increases. Among them, the last heat dissipation fin forms the largest temperature drop, and multiple heat dissipation fins show the phenomenon of increasing temperature drop from piece to piece. This limits the overall heat dissipation efficiency, and part of the heat dissipation fins do not fully play a role, resulting in a significant reduction in the overall heat dissipation efficiency of the heat sink. SUMMARY

[0004] Therefore, it is necessary to provide an aluminum heat sink structure of a power transformer in view of the problem that the distances between multiple heat dissipation fins and the transformer are different, resulting in uneven heat dissipation efficiency.

[0005] The above-mentioned purpose is achieved by the following technical solutions: The application discloses an aluminum radiator structure of a power transformer, which comprises a plurality of radiating units, each of which comprises a liquid inlet pipe, a liquid outlet pipe, a plurality of radiating plates and a connecting structure; the liquid inlet pipe is used for receiving heat transfer medium from the high temperature of the transformer; the liquid outlet pipe is used for returning the cooled heat transfer medium to the transformer; the radiating plates are arranged in plurality, and the plurality of radiating plates are arranged between the liquid inlet pipe and the liquid outlet pipe; the inside of each radiating plate is provided with a flow channel, and the plurality of flow channels are sequentially communicated to form a flow path for the movement of the heat transfer medium, and the two ends of the flow path are communicated with the liquid inlet pipe and the liquid outlet pipe respectively; the extension direction of each flow channel and the axial direction of the liquid inlet pipe are in the same plane and have a preset first included angle, so that the heat transfer medium flows along an inclined path in the flow channel, and the heat transfer medium close to the transformer flows away from the transformer, and the heat transfer medium away from the transformer flows close to the transformer; the connecting structure is used for communicating the flow channels of adjacent radiating plates.

[0006] Further, the extension direction of the flow channel and the extension direction of the radiating plate are in the same plane and have a preset second included angle, and the inclined directions of the flow channels on adjacent radiating plates are opposite.

[0007] Further, the outer wall of the radiating plate is fixedly provided with a plurality of fins, and the fins are used for increasing the radiating area.

[0008] Further, the fins extend along the extension direction of the flow channel to guide the air flow.

[0009] Further, in the axial direction of the liquid inlet pipe, the adjacent radiating plates are arranged in parallel; in the radial direction of the liquid inlet pipe, at least one radiating plate extends in the direction away from the transformer; and the adjacent radiating plates extend in the direction close to the transformer.

[0010] Further, the connecting structure comprises a plurality of connecting pipes, each of which is located between adjacent radiating plates and is fixedly connected with the two adjacent radiating plates.

[0011] Further, the connecting pipe comprises a first half pipe and a second half pipe, the first half pipe is fixedly connected to the end of one radiating plate, and the second half pipe is fixedly connected to the end of one adjacent radiating plate, so that the two adjacent radiating plates can be butt-jointed through the first half pipe and the second half pipe.

[0012] Further, a sealing element is arranged between the first half pipe and the second half pipe, and the sealing element is used for realizing the sealed connection of the first half pipe and the second half pipe.

[0013] Further, the heat dissipation unit further comprises a limiting structure, the limiting structure is used for locking relative positions of the plurality of heat dissipation plates.

[0014] Further, the limiting structure comprises a plurality of limiting plates and a plurality of locking pieces, at least two limiting plates are clamped on outer walls of the plurality of heat dissipation plates; and the locking pieces are used for locking the at least two limiting plates.

[0015] The beneficial effects of the present application are: The present application provides an aluminum radiator structure of a power transformer, comprising a plurality of heat dissipation units. Each heat dissipation unit comprises a liquid inlet pipe, a liquid outlet pipe, a heat dissipation plate and a connecting structure. The liquid inlet pipe stably receives high-temperature heat transfer medium from the transformer, and the liquid outlet pipe returns the cooled heat transfer medium to the transformer. A plurality of heat dissipation plates are arranged between the liquid inlet pipe and the liquid outlet pipe, and the flow channels of the plurality of heat dissipation plates are sequentially communicated through the connecting structure to form a complete flow path. The extension direction of the heat dissipation plate is inclinedly arranged at a preset first included angle with the axial direction of the liquid inlet pipe, so that the flow channel guides the heat transfer medium to flow along the inclined path, realizing the effect that the heat transfer medium close to the transformer flows away from the transformer, and the heat transfer medium away from the transformer flows close to the transformer. Thus, each heat dissipation plate can uniformly receive heat and fully play a heat dissipation role. At the same time, the inclined flow path increases the flow path of the heat transfer medium in the heat dissipation plate, and improves the overall heat dissipation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure diagram of a heat dissipation plate in an aluminum radiator structure of a power transformer provided by the embodiment of the present application; Figure 2 A structure diagram of a heat dissipation plate in an aluminum radiator structure of a power transformer provided by the embodiment of the present application; Figure 1 A sectional view of the structure shown in the figure; Figure 3 A structure diagram of an aluminum radiator structure of a power transformer provided by the embodiment of the present application; Figure 4 A structure diagram of a heat dissipation unit in an aluminum radiator structure of a power transformer provided by the embodiment of the present application; Figure 5 A structure diagram of a heat dissipation unit in an aluminum radiator structure of a power transformer provided by the embodiment of the present application; Figure 4 An enlarged view of part A in the figure; Figure 6 A structure diagram of a heat dissipation unit in an aluminum radiator structure of a power transformer provided by the embodiment of the present application; Figure 4 A side view of the structure shown in the figure; Figure 7 A front view of the structure shown in the figure; Figure 4 A front view of the structure shown in the figure; Figure 8 A sectional view in the A-A direction of the figure; Figure 7 A sectional view in the A-A direction of the figure; Figure 9An exploded view of a heat dissipation unit in an aluminum heat radiator structure of a power transformer is provided for an embodiment of the present application.

[0017] Wherein: 110, transformer; 210, liquid inlet pipe; 220, liquid outlet pipe; 230, heat dissipation plate; 240, connecting pipe; 241, first half pipe; 242, second half pipe; 243, sealing washer; 250, fin; 260, limiting plate; 261, locking bolt. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application by embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0019] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. And the "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0020] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0021] The following refers to Figures 1 to 9 An aluminum heat radiator structure of a power transformer is described for an embodiment of the present application, which includes a transformer 110 and a heat dissipation unit.

[0022] Specifically, the transformer 110 is a core power transformation device in a power system, which continuously generates heat during operation, and is filled with a heat transfer medium for conducting heat, which can quickly absorb the heat generated inside the transformer 110 and expand in volume after absorbing the heat.

[0023] The heat dissipation unit includes a liquid inlet pipe 210, a liquid outlet pipe 220, a heat dissipation plate 230, a connecting structure, and a limiting structure. The following description of the direction is based on the direction of the heat dissipation unit. Figure 5 The view is expanded.

[0024] The liquid inlet pipe 210 is a hollow tubular structure fixedly connected to the oil outlet on the upper end of the transformer 110 and extends in the horizontal direction. The outer wall of the liquid inlet pipe 210 is fixedly provided with a mounting plate to provide additional mounting support points. The liquid inlet pipe 210 is used to receive high-temperature heat transfer medium from the inside of the transformer 110. The liquid inlet pipe 210 is uniformly provided with a plurality of liquid inlet holes penetrating the pipe wall. The heat transfer medium entering the liquid inlet pipe 210 flows out of the liquid inlet holes, and the liquid inlet holes provide a passage for the flow of heat transfer medium. The liquid outlet pipe 220 is also a hollow tubular structure fixedly connected to the oil return port on the lower end of the transformer 110 and extends in parallel with the liquid inlet pipe 210 in the horizontal direction. The liquid outlet pipe 220 is used to recycle the cooled heat transfer medium to the transformer 110. The liquid outlet pipe 220 is uniformly provided with a plurality of liquid outlet holes penetrating the pipe wall. The cooled heat transfer medium enters the liquid outlet pipe 220 through the liquid outlet holes.

[0025] The heat dissipation plate 230 is provided with a plurality of heat dissipation plates 230, each of which is a hollow structure, and a plurality of partition plates are fixedly arranged inside the heat dissipation plate 230. The plurality of partition plates separate the inside of the heat dissipation plate 230 into a plurality of flow channels penetrating the upper and lower end faces of the heat dissipation plate 230. The flow channels of the plurality of heat dissipation plates 230 are sequentially connected to provide a flow path for the flow of heat transfer medium. In the plane where the axis of the liquid inlet pipe 210 and the axis of the liquid outlet pipe 220 are located, each flow channel extends along the extension direction of the heat dissipation plate 230. Each heat dissipation plate 230 has a predetermined first included angle with the liquid inlet pipe 210 in the plane. The uppermost heat dissipation plate 230 is fixedly connected to the liquid inlet pipe 210 at an angle, and the flow channel of each heat dissipation plate 230 at the uppermost end is connected to the liquid inlet pipe 210 through a liquid inlet hole. The lowermost heat dissipation plate 230 is fixedly connected to the liquid outlet pipe 220 at an angle, and the flow channel of each heat dissipation plate 230 at the lowermost end is connected to the liquid outlet pipe 220 through a liquid outlet hole.

[0026] In the horizontal radial direction of the liquid inlet pipe 210, half of the number of the heat dissipation plates 230 are arranged in the front row, and the other half of the number of the heat dissipation plates 230 are arranged in the rear row. Among them, the heat dissipation plates 230 in the rear row are in the form of the heat dissipation plates 230 in the front row being flipped around the vertical direction, that is, the heat dissipation plates 230 in the rear row can be obtained by flipping the heat dissipation plates 230 in the front row, and the heat dissipation plates 230 in the rear row after being flipped are opposite to the heat dissipation plates 230 in the front row in the inclined direction, thereby ensuring that the symmetrical arrangement of the heat dissipation plates 230 in the front row and the rear row is consistent with the flow logic.

[0027] A plurality of rows of heat dissipation plates 230 are arranged in the vertical direction, and the heat dissipation plates 230 in each row are arranged in parallel and at intervals. Each heat dissipation plate 230 is inclined in the direction of the first included angle. Among them, the heat dissipation plates 230 in the front row extend away from the transformer 110, and the heat dissipation plates 230 in the rear row extend towards the transformer 110. Among them, the flow channel of the heat dissipation plate 230 in the front row at the right edge position is in communication with the flow channel of the heat dissipation plate 230 in the rear row at the right edge position of the next row, forming a continuous and through heat transfer medium flow path. The flow channel of the heat dissipation plate 230 in the rear row at the left edge position is in communication with the flow channel of the heat dissipation plate 230 in the front row at the left edge position of the next row, forming a continuous and through heat transfer medium flow path. In this way, it is ensured that the heat transfer medium realizes uninterrupted flow between the plurality of rows of heat dissipation plates 230 in the front row and the plurality of rows of heat dissipation plates 230 in the rear row.

[0028] The connecting structure includes a connecting pipe 240. The connecting pipe 240 is a hollow tubular structure, fixedly connected between adjacent heat dissipation plates 230, for realizing stable connection of adjacent heat dissipation plates 230, while ensuring sealed communication of adjacent flow channels, and preventing leakage of heat transfer medium. At the same time, the uppermost heat dissipation plates 230 are connected with the liquid inlet pipe 210 through the connecting pipe 240; and the lowermost heat dissipation plates 230 are connected with the liquid outlet pipe 220 through the connecting pipe 240.

[0029] The limiting structure includes a plurality of limiting plates 260 and a plurality of locking members. Any two limiting plates 260 correspondingly clamp the two end portions of the connecting pipe 240 of the plurality of heat dissipation plates 230 in the same row. The locking member is provided as a locking bolt 261, which is used to lock the two oppositely arranged limiting plates 260, realizes stable limiting of the overall structure of the heat dissipation plates 230 through continuous and stable locking force, and ensures the arrangement state and connection stability of the heat dissipation plates 230.

[0030] When the transformer 110 is running, the heat generated by the transformer 110 is absorbed by the internal heat transfer medium, the volume of the heat transfer medium expands, enters the liquid inlet pipe 210 through the oil outlet of the transformer 110, passes through a plurality of liquid inlet holes on the liquid inlet pipe 210, and respectively enters the flow channel of a heat dissipation plate 230, thereby completing the shunt input of the heat transfer medium.

[0031] The heat transfer medium entering the leftmost heat dissipation plate 230 of the front row flows in the direction away from the transformer 110 along the heat dissipation plates 230 of the front row, and flows linearly into the liquid outlet pipe 220 along the inclined flow path; the heat transfer medium entering the rightmost heat dissipation plate 230 of the front row flows in the direction away from the transformer 110 for a distance, and then flows horizontally to the corresponding heat dissipation plate 230 of the next row in the rear row through the connecting pipe 240, and then flows in the direction close to the transformer 110 along the heat dissipation plates 230 of the rear row. The heat transfer medium entering the heat dissipation plate 230 at the middle position of the front row flows to the corresponding heat dissipation plate 230 of the next row in the rear row if it flows to the edge position before entering the liquid outlet pipe 220, and finally flows into the liquid outlet pipe 220 from the flow channel of the heat dissipation plate 230 of the rear row. The flow logic of the heat transfer medium in the heat dissipation plates 230 of the rear row is completely consistent with that of the heat dissipation plates 230 of the front row, ensuring that the flow paths of the heat transfer medium in all heat dissipation plates 230 are regular and the heat dissipation effect is balanced, and maximizing the overall heat dissipation performance of the heat dissipation unit.

[0032] In this way, the flow path length of the heat transfer medium inside the heat dissipation plate 230 is increased, the contact area between the heat dissipation plate 230 and the external air is expanded, and sufficient space conditions are provided for heat exchange, thereby improving the basic heat dissipation performance of the heat dissipation plate 230.

[0033] In particular, the heat dissipation plate 230 is integrally formed by an aluminum alloy hot forming extrusion process. This process is simple and easy to operate, and can meet the needs of large-scale batch production, thereby improving the heat conduction efficiency of the heat dissipation plate 230. The aluminum alloy material makes the heat dissipation plate 230 have strong rust and corrosion resistance, and can adapt to multiple operating environments.

[0034] Further, the extension direction of the flow channel of each heat dissipation plate 230 and the extension direction of the heat dissipation plate 230 have a preset second included angle in the same plane, and the inclined directions of the flow channels on adjacent heat dissipation plates 230 are opposite.

[0035] Specifically, the flow channel of the first heat dissipation plate 230 at the leftmost position of the first row of the front row is inclined forward along the second included angle, the flow channel of the second heat dissipation plate 230 adjacent to it in the same row is inclined backward along the second included angle, and the flow channels of the subsequent heat dissipation plates 230 in the row are alternately arranged in the order of forward and backward; the flow channel of the first heat dissipation plate 230 at the leftmost position of the second row of the front row is inclined backward along the second included angle, the flow channel of the second heat dissipation plate 230 adjacent to it in the same row is inclined forward along the second included angle, and the flow channels of the subsequent heat dissipation plates 230 in the row are also alternately arranged in the order of backward and forward, and the inclined direction of the flow channel of the heat dissipation plate 230 at the corresponding position of the second row of the front row is opposite to that of the heat dissipation plate 230 at the corresponding position of the first row.

[0036] Similarly, the flow channel of the first heat dissipation plate 230 at the leftmost side of the first row in the rear column is inclined rearward along the second included angle, the flow channel of the second heat dissipation plate 230 adjacent to the first heat dissipation plate 230 in the same row is inclined forward along the second included angle, and the flow channels of the subsequent heat dissipation plates 230 in the same row are alternately arranged in the order of rearward and forward. The flow channel of the first heat dissipation plate 230 at the leftmost side of the second row in the rear column is inclined forward along the second included angle, the flow channel of the second heat dissipation plate 230 adjacent to the first heat dissipation plate 230 in the same row is inclined rearward along the second included angle, and the flow channels of the subsequent heat dissipation plates 230 in the same row are alternately arranged in the order of forward and rearward, and the inclination direction of the flow channel of the second row in the rear column is opposite to the inclination direction of the flow channel of the corresponding heat dissipation plate 230 in the first row.

[0037] Therefore, the heat transfer medium forms a zigzag flow path in the flow channel of the heat dissipation plate 230, and the heat transfer medium needs to continuously adapt to the reverse inclination direction of the flow channel during the flow process, so that the heat transfer medium can generate turbulence during the flow process, avoid the generation of a boundary layer in a laminar flow state during the flow process of the heat transfer medium, increase the contact area and contact frequency between the heat transfer medium and the inner wall of the flow channel, improve the heat exchange efficiency of the heat transfer medium, and ensure that each heat dissipation plate 230 can fully play a heat dissipation role, thereby further strengthening the balance of the overall heat dissipation effect of the heat dissipation unit.

[0038] In particular, the heat dissipation plates 230 in the front column and the heat dissipation plates 230 in the rear column are distributed in a cross state in the same row, so that the external airflow can pass between the heat dissipation plates 230 in the front column or the rear column, thereby fully covering the outer surfaces of the heat dissipation plates 230 in the rear column or the front column on the corresponding side, achieving coverage of the outer surfaces of all the heat dissipation plates 230, and ensuring that each heat dissipation plate 230 can be fully contacted with the airflow, thereby further improving the external heat dissipation efficiency of the heat dissipation plates 230.

[0039] Further, the outer wall of the heat dissipation plate 230 is fixedly provided with a plurality of fins 250. The fins 250 are in a sheet structure, the plurality of fins 250 extend along the extension direction of the flow channel of the heat dissipation plate 230, and the plurality of fins 250 are uniformly arranged on the left and right side walls of the heat dissipation plate 230 in parallel and are fixedly connected with the left and right side walls of the heat dissipation plate 230. The fins 250 are used to increase the heat dissipation area of the heat dissipation plate 230.

[0040] In the vertical direction, the extension directions of the flow channels of the adjacent rows of heat dissipation plates 230 are opposite. Since the extension direction of the fins 250 is consistent with the flow channel, the fins 250 above and below alternately form forward openings and rearward openings in the vertical direction.

[0041] When external airflow enters between two adjacent heat sinks 230, if it first enters the space between the foremost and forward-facing fins 250 on the left heat sink 230, it will be obstructed by the fins 250 and then flow laterally into the space between the corresponding rearward-facing fins 250 on the right heat sink 230. Similarly, if the airflow first enters the space between the foremost and forward-facing fins 250 on the right heat sink 230, it will flow laterally into the space between the corresponding rearward-facing fins 250 on the left heat sink 230. Subsequent airflow always follows this flow logic. The airflow continuously flows between the fins 250 of the adjacent heat sinks 230, continuously changing direction in the horizontal direction, generating turbulent airflow. This increases the contact frequency and sufficiency between the airflow and the fins 250 and the outer wall of the heat sink 230, accelerating the transfer of heat from the outer wall of the heat sink 230 to the outside.

[0042] It is understandable that both the first and second included angles are adjustable design parameters. The values ​​of the first and second included angles can be flexibly set according to actual heat dissipation requirements to adapt to the heat dissipation efficiency requirements under different operating conditions.

[0043] Specifically, when the first included angle is a right angle, the heat sink 230 is arranged vertically. In this case, the second included angle can be set to a corresponding angle according to the tilt requirements of the flow channel and fins 250, causing the flow channel and fins 250 to extend tilted along the direction of the preset second included angle, forming a flow channel with a specific flow direction. When the flow channel and fins 250 are arranged vertically, the first included angle can be set to a corresponding angle according to the tilt requirements of the heat sink 230, causing the heat sink 230 to extend tilted along a preset direction, guiding the heat transfer medium to flow along an inclined path. The first and second included angles provide dual adjustability to the layout of the heat sink 230, flow channel, and fins 250, ensuring both optimized flow path of the heat transfer medium and improved external airflow efficiency.

[0044] Furthermore, the connecting pipe 240 includes a first half-pipe 241 and a second half-pipe 242. The first half-pipe 241 and the second half-pipe 242 are respectively fixed to the upper and lower end faces of a heat sink 230. The first half-pipe 241 at the lower end of the upper heat sink 230 and the second half-pipe 242 at the upper end of the lower heat sink 230 can be sealed together. The mating surface of the first half-pipe 241 and the second half-pipe 242 is a horizontal interface. This horizontal interface provides a flat reference surface for the mating of the first half-pipe 241 and the second half-pipe 242, ensuring that the first half-pipe 241 and the second half-pipe 242 can be completely fitted together, thereby realizing the connection of the flow channels of two adjacent heat sinks 230. Thus, by prefabricating and fixing the first half-pipe 241 and the second half-pipe 242 to the end of each heat sink 230, it is suitable for large-scale mass production, reducing the overall manufacturing process complexity and manufacturing cost of the heat sink unit.

[0045] A sealing element is provided between the first half-pipe 241 and the second half-pipe 242. The sealing element is a sealing gasket 243, which is placed between the first half-pipe 241 and the second half-pipe 242 to achieve a sealed connection after the first half-pipe 241 and the second half-pipe 242 are joined together, preventing leakage of the heat transfer medium at the joint of the first half-pipe 241 and the second half-pipe 242, and ensuring the sealing and stability of the heat transfer medium flow.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An aluminum heat sink structure for a power transformer, characterized in that, The device includes multiple heat dissipation units, each of which includes an inlet pipe, an outlet pipe, a heat dissipation plate, and a connecting structure. The inlet pipe receives the heat transfer medium from the high temperature of the transformer. The outlet pipe returns the cooled heat transfer medium to the transformer. Multiple heat dissipation plates are arranged between the inlet pipe and the outlet pipe. Each heat dissipation plate has a flow channel inside, and the multiple flow channels are connected in sequence to form a flow path for the heat transfer medium. The two ends of the flow path are respectively connected to the inlet pipe and the outlet pipe. The extension direction of each flow channel has a preset first angle with the axial direction of the inlet pipe in the same plane, so that the heat transfer medium flows along an inclined path in the flow channel, causing the heat transfer medium near the transformer to flow away from the transformer, and the heat transfer medium away from the transformer to flow towards the transformer. The connecting structure connects the flow channels of adjacent heat dissipation plates.

2. The aluminum heat sink structure for a power transformer according to claim 1, characterized in that, The extension direction of the flow channel and the extension direction of the heat sink are in the same plane and have a preset second angle, and the inclination direction of the flow channel on the adjacent heat sink is opposite.

3. The aluminum heat sink structure for a power transformer according to claim 2, characterized in that, The outer wall of the heat sink is fixedly provided with multiple fins, which are used to increase the heat dissipation area.

4. The aluminum heat sink structure for a power transformer according to claim 3, characterized in that, The fins extend along the direction of the flow channel to guide airflow.

5. The aluminum heat sink structure for a power transformer according to claim 1, characterized in that, In the axial direction of the liquid inlet pipe, adjacent heat sinks are arranged in parallel; in the radial direction of the liquid inlet pipe, at least one heat sink extends inclined away from the transformer; adjacent heat sinks extend inclined towards the transformer.

6. The aluminum heat sink structure for a power transformer according to claim 1, characterized in that, The connection structure includes multiple connecting pipes, each of which is located between adjacent heat sinks and is fixedly connected to two adjacent heat sinks.

7. The aluminum heat sink structure for a power transformer according to claim 6, characterized in that, The connecting pipe includes a first half-pipe and a second half-pipe. The first half-pipe is fixedly connected to the end of one of the heat sinks, and the second half-pipe is fixedly connected to the end of an adjacent heat sink, so that the two adjacent heat sinks can be connected through the first half-pipe and the second half-pipe.

8. The aluminum heat sink structure for a power transformer according to claim 7, characterized in that, A sealing element is provided between the first half-pipe and the second half-pipe, and the sealing element is used to achieve a sealed connection between the first half-pipe and the second half-pipe.

9. The aluminum heat sink structure for a power transformer according to claim 1, characterized in that, The heat dissipation unit also includes a limiting structure for locking the relative positions of the plurality of heat dissipation plates.

10. The aluminum heat sink structure for a power transformer according to claim 9, characterized in that, The limiting structure includes multiple limiting plates and multiple locking members, with at least two of the limiting plates clamped to the outer walls of the multiple heat sinks; the locking members are used to lock at least two of the limiting plates.

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