Power transformer convenient for dust removal and heat dissipation

Abstract

The power transformer comprises a shell, a plurality of parallel annular silicon steel sheets are distributed in the shell, and coils are wound on the two sides of each silicon steel sheet; an air outlet is formed in the top of the shell, and a fan is arranged at the air outlet; side air inlets are formed in the two sides of the shell, and a lower air inlet is formed in the bottom of the shell; compared with the prior art, by optimizing the air duct design, introducing a targeted heat dissipation strategy and an innovative linkage self-cleaning air volume adjusting mechanism, the problems that a traditional transformer is low in heat dissipation efficiency, prone to dust accumulation, inconvenient to maintain and the like are effectively solved, the operation reliability of equipment is remarkably improved, the service life of the equipment is remarkably prolonged, and the operation convenience of the equipment is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of power transformer technology, specifically a power transformer that facilitates dust removal and heat dissipation. Background Technology

[0002] Power transformers, as core components of power electronic equipment, are widely used in industrial control, communication equipment, home appliances, and new energy systems. Their working principle is based on electromagnetic induction. During voltage transformation and energy transfer, energy losses are inevitable, mainly including coil copper losses and core iron losses. These two losses are ultimately converted into heat. If this heat cannot be dissipated effectively and in a timely manner, the internal temperature of the transformer will rise, leading to aging of insulation materials, increased coil resistance, and decreased efficiency. In severe cases, it can even cause equipment failure or burnout. Therefore, heat dissipation performance directly determines the transformer's load capacity, service life, and operational reliability.

[0003] Cooling is achieved by installing heat dissipation fins or heat sinks on the transformer casing, utilizing natural air convection. This type of structure is simple and has no moving parts, but its heat dissipation efficiency is relatively low, making it difficult to meet the needs of high-power or high-density applications.

[0004] Installing a fan on the casing accelerates airflow through forced convection, improving heat dissipation. Such structures typically have inlet and outlet vents on the side or top of the casing, creating a unidirectional airflow channel. However, existing designs often fail to adequately consider the matching of airflow with the heat-generating components. Cool air circulates only within the casing as a whole, making it difficult to precisely clean the coil surface and the gaps between the iron core, resulting in persistent localized hot spots.

[0005] To prevent dust from entering, some transformers have filters installed at the air inlet. However, traditional filters are prone to clogging and lack effective self-cleaning or easy-to-clean mechanisms. After long-term use, the filters accumulate severe dust, increasing airflow resistance and significantly reducing heat dissipation performance. Maintenance often requires stopping the machine for disassembly, which is cumbersome and disrupts continuous equipment operation.

[0006] Therefore, it is necessary to provide a power transformer that facilitates dust removal and heat dissipation to solve the problems mentioned in the background art. Summary of the Invention

[0007] To achieve the above objectives, the present invention provides the following technical solution: a power transformer that facilitates dust removal and heat dissipation, comprising a housing, wherein multiple parallel annular silicon steel sheets are distributed inside the housing, and coils are wound around both sides of the silicon steel sheets;

[0008] An air outlet is provided on the top of the outer casing, and a fan is provided at the air outlet;

[0009] The outer casing has side air inlets on both sides and a bottom air inlet at the bottom.

[0010] The side air inlet consists of multiple circumferentially distributed hollow openings, and a ring of side filters is distributed around the side air inlet. The end of the side filter away from the side air inlet is rotated and covered by a side turntable.

[0011] The side air inlet is rotatably positioned within the side filter screen and has a first misaligned disc. The first misaligned disc has multiple cutouts corresponding to the side air inlet and is fixed to the side turntable.

[0012] The side turntable is equipped with multiple first roller brushes that rotate around its edge, and each first roller brush is attached to the surface of the side filter screen.

[0013] A rubber friction roller is fixed to one end of the first roller brush near the outer shell, and a first friction ring is fixed around the periphery of the side filter screen. Each of the first friction rollers is attached to the inner wall of the first friction ring.

[0014] The lower air inlet is a plurality of hollow openings distributed in a circle. A lower filter screen is distributed around the lower air inlet. The end of the lower filter screen away from the lower air inlet is rotated to cover the lower turntable.

[0015] The lower air inlet is rotatably provided with a second misaligned disc inside the lower filter screen. The second misaligned disc has multiple hollows corresponding to the lower air inlet and is fixed to the lower turntable.

[0016] The lower turntable is provided with multiple second roller brushes on its edge, and each second roller brush is attached to the surface of the lower filter screen.

[0017] A second friction roller made of rubber is fixed to one end of the second roller brush near the outer shell, and a second friction ring is fixed around the lower filter screen. Each of the second friction rollers is attached to the inner wall of the second friction ring.

[0018] A toothed ring is fixed to the edge of the lower turntable, and side gears that mesh with the toothed ring are rotatably arranged on both sides of the outer shell.

[0019] Each of the side turntables is fixed with a bevel gear ring on its edge, and the lower part of the side gear is rotatably equipped with a bevel gear that meshes with it.

[0020] The side gear has a rotating shaft fixed at its center. The rotating shaft is rotatably connected to the housing, and the upper end of the rotating shaft is fixed to the bevel gear on the corresponding side.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] Highly efficient and targeted heat dissipation performance: For the coil (copper loss): The side air inlet design allows cool air to flow tangentially along the coil and penetrate deep into the tiny grooves between the conductors, greatly increasing the heat dissipation area and airflow contact efficiency, significantly improving the heat dissipation effect of the winding section. For the silicon steel sheets (iron loss): The bottom air inlet design allows cool air to pass vertically upward through the extremely fine gaps between the silicon steel sheets, with the air flowing parallel to the sheet surface, effectively disrupting the laminar boundary layer and greatly improving the heat transfer efficiency of the iron core.

[0023] Excellent dustproof and self-cleaning capabilities: Multiple filtration: The air inlets on the sides and bottom are equipped with filters, which effectively prevent external dust from entering the transformer and avoid poor heat dissipation or reduced insulation performance caused by dust accumulation.

[0024] Linked self-cleaning: Through a unique mechanical linkage design, users can drive the roller brush to perform a combined cleaning action of revolution and rotation on the filter while adjusting the air volume. No disassembly or additional tools are required, which greatly reduces the frequency and difficulty of manual maintenance and ensures long-term stable air intake efficiency.

[0025] Flexible airflow adjustment and ease of operation: The staggered disc structure allows users to easily adjust the opening of the side and bottom air inlets, flexibly distributing airflow according to seasonal changes, ambient dust concentration, or equipment load to achieve the optimal balance between heat dissipation efficiency and dust prevention requirements. The linkage mechanism of gears and bevel gears enables "single-point operation, multi-point linkage." Simply rotating one side disc simultaneously adjusts the airflow of both side and bottom air inlets and activates the cleaning function of all filters, making operation extremely simple and efficient. (See attached diagram.)

[0026] Figure 1 This is a schematic diagram of the overall structure of a power transformer that facilitates dust removal and heat dissipation.

[0027] Figure 2 This is a schematic diagram of the internal structure of a power transformer that facilitates dust removal and heat dissipation.

[0028] Figure 3 This is a schematic cross-sectional view of a power transformer that facilitates dust removal and heat dissipation.

[0029] Figure 4 This is a structural diagram of the side air inlet;

[0030] Figure 5 This is a structural diagram of the lower air inlet;

[0031] In the diagram: 1. Outer shell; 2. Silicon steel sheet; 3. Coil; 4. Air outlet; 41. Fan; 5. Side air inlet; 51. Side filter; 52. Side turntable; 53. First misaligned disc; 54. First roller brush; 55. Bevel gear ring; 56. Bevel gear; 57. First friction roller; 58. First friction ring; 6. Lower air inlet; 61. Lower filter; 62. Lower turntable; 63. Second misaligned disc; 64. Second roller brush; 65. Gear ring; 66. Second friction roller; 67. Second friction ring; 7. Side gear; 71. Shaft. Detailed Implementation

[0032] Please see Figures 1-5 In this embodiment of the invention, a power transformer that facilitates dust removal and heat dissipation includes a housing 1, inside which are distributed multiple parallel annular silicon steel sheets 2, and coils 3 are wound on both sides of the silicon steel sheets 2.

[0033] The top of the outer casing 1 is provided with an air outlet 4, and a fan 41 is provided at the air outlet 4;

[0034] The outer casing 1 has side air inlets 5 on both sides and a bottom air inlet 6 at the bottom.

[0035] Coil 3 is made of copper wire wound layer by layer. Its surface is arc-shaped and has small grooves between the wires. The side air inlets 5 are located on both sides of the outer shell 1. The cold air introduced by them flows horizontally and flows along the tangent of each coil 3. This can evenly wash the outer surface of each coil and carry away the heat generated by copper loss along the tiny grooves between the wires.

[0036] There are extremely small insulating gaps between the silicon steel sheets 2. The lower air inlet 6 is located directly below, and the cold air flows vertically upward. When the airflow encounters the parallel stacked silicon steel sheets 2, it will naturally pass through the gaps between the sheets. The air flows parallel to the sheet surface, which can destroy the laminar boundary layer to the greatest extent and carry the heat generated by iron loss directly away from the sheet surface.

[0037] In this embodiment, the side air inlet 5 is a plurality of hollow openings distributed in a circle, and a ring of side filter 51 is distributed around the side air inlet 5. The end of the side filter 51 away from the side air inlet 5 is rotated and covered by a side turntable 52.

[0038] In other words, the air entering the housing 1 from the side air inlet 5 must be filtered by the side filter 51, which can remove dust from the side air intake.

[0039] In this embodiment, the side air inlet 5 is rotatably provided with a first misaligned disc 53 within the side filter 51. The first misaligned disc 53 has multiple hollows corresponding to the side air inlet 5, and the first misaligned disc 53 is fixed to the side turntable 52.

[0040] In other words, by adjusting the angle of the side turntable 52, the cutout of the first misaligned disc 53 can be aligned with or offset from the side air inlet 5, thereby adjusting the side air intake.

[0041] In this embodiment, the edge of the side turntable 52 is provided with multiple first roller brushes 54, and each first roller brush 54 is attached to the surface of the side filter screen 51.

[0042] By rotating the side turntable 52, each first roller brush 54 can be driven to revolve, thereby cleaning the entire surface of the side filter screen 51.

[0043] In this embodiment, a first friction roller 57 made of rubber is fixed to one end of the first roller brush 54 near the outer shell 1, and a first friction ring 58 is fixed around the side filter screen 51. Each of the first friction rollers 57 is attached to the inner wall of the first friction ring 58.

[0044] It is also said that when the side turntable 52 drives each first roller brush 54 to revolve, the friction force of the first friction ring 58 on the first friction roller 57 drives the first roller brush 54 to rotate, which can improve the cleaning effect.

[0045] In this embodiment, the lower air inlet 6 is a plurality of hollow openings distributed in a circle, and a ring of lower filter screen 61 is distributed around the lower air inlet 6. The end of the lower filter screen 61 away from the lower air inlet 6 is rotated to cover the lower turntable 62.

[0046] The lower air inlet 6 is rotatably provided with a second misaligned disk 63 within the lower filter screen 61. The second misaligned disk 63 has multiple hollows corresponding to the lower air inlet 6, and the second misaligned disk 63 is fixed to the lower turntable 62.

[0047] The lower turntable 62 is rotatably provided with multiple second roller brushes 64, each of which is attached to the surface of the lower filter screen 61.

[0048] The second roller brush 64 is fixed with a rubber second friction roller 66 at one end near the outer shell 1. A second friction ring 67 is fixed around the lower filter screen 61. Each second friction roller 66 is attached to the inner wall of the second friction ring 67.

[0049] Similarly, this design allows for adjustment of the air intake at the bottom and for dust removal and cleaning of the bottom air intake filter 61.

[0050] In this embodiment, a toothed ring 65 is fixed on the edge of the lower turntable 62, and side gears 7 that mesh with the toothed ring 65 are rotatably arranged on both sides of the outer shell 1.

[0051] Each of the side turntables 52 has a bevel gear ring 55 fixed to its edge, and the lower part of the side gear 7 is rotatably provided with a bevel gear 56 that meshes with it.

[0052] The side gear 7 has a rotating shaft 71 fixed at its center. The rotating shaft 71 is rotatably connected to the outer casing 1, and the upper end of the rotating shaft 71 is fixed to the bevel gear 56 on the corresponding side.

[0053] In other words, by rotating one of the side turntables 52, the lower turntable 62 and the other side turntable 52 can be rotated synchronously, thereby adjusting the side air intake and the lower air intake simultaneously, and the side filter 51 and the lower filter 61 can also be cleaned at the same time.

[0054] In practical implementation, the initial state and startup are as follows: After the transformer is energized, the internal coils and silicon steel sheets begin to work and generate heat. At this time, the fan at the air outlet at the top of the casing starts, creating a negative pressure inside the casing, driving external cold air to be continuously drawn in from the side air inlets on both sides of the casing and the bottom air inlet. Side air intake and targeted heat dissipation and dust removal: Cold air enters from the side air inlets. Since the side air inlets are located on both sides of the coil, the introduced cold air flows horizontally, precisely along the tangent direction of each coil turn. The airflow evenly washes the outer surface of each turn of copper wire and flows along the tiny grooves formed by the layers of winding between the wires, effectively carrying away the heat generated by copper loss. During this process, the side filter screen filters the incoming air, intercepting dust and ensuring that the internal coils are not contaminated. Bottom air intake and targeted heat dissipation and dust removal: Cold air enters from the bottom air inlet, and the airflow flows vertically upward. When it encounters the parallel stacked silicon steel sheets, the airflow naturally passes through the extremely small insulation gaps between the sheets. Air flows parallel to the surface of the silicon steel sheet, disrupting the laminar boundary layer and directly carrying away the heat generated by iron loss from the sheet surface, achieving efficient cooling of the iron core. Airflow adjustment and linked cleaning: Users can adjust the airflow according to ambient temperature or transformer load. Rotating one side turntable drives the first misaligned disc on that side to rotate, aligning or misaligning its cutout with the side air inlet, thereby adjusting the side airflow. Simultaneously, this rotation, through the linkage mechanism of side gears, bevel gears, and gear rings, synchronously drives the lower turntable and the other side turntable to rotate, achieving synchronized adjustment of the bottom and other side airflow. Filter self-cleaning process: During the adjustment of airflow and rotation of the side turntable, the first roller brush on the edge of the side turntable revolves around the side filter. Simultaneously, the first friction roller at the end of the first roller brush contacts the fixed first friction ring, driving the first roller brush to rotate under friction, thus efficiently cleaning the surface of the side filter. Similarly, the rotation of the lower turntable, through the cooperation of the second friction roller and the second friction ring, drives the second roller brush to revolve and rotate, achieving simultaneous cleaning of the lower filter. The entire cleaning process is completed simultaneously with the airflow adjustment operation, requiring no additional operation.

[0055] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A power transformer that facilitates dust removal and heat dissipation, comprising a housing (1), wherein multiple parallel annular silicon steel sheets (2) are distributed inside the housing (1), and coils (3) are wound on both sides of the silicon steel sheets (2). The top of the outer shell (1) is provided with an air outlet (4), and a fan (41) is provided at the air outlet (4). The outer shell (1) has side air inlets (5) on both sides and a bottom air inlet (6) at the bottom.

2. The power transformer for easy dust removal and heat dissipation according to claim 1, characterized in that, The side air inlet (5) is a plurality of hollow openings distributed in a circle. A ring of side filter (51) is distributed around the side air inlet (5). The side filter (51) is rotated and covered by a side turntable (52) at the end away from the side air inlet (5).

3. A power transformer for easy dust removal and heat dissipation according to claim 2, characterized in that, The side air inlet (5) is rotatably provided with a first misaligned disc (53) inside the side filter (51). The first misaligned disc (53) has multiple hollows corresponding to the side air inlet (5), and the first misaligned disc (53) is fixed to the side turntable (52).

4. A power transformer for easy dust removal and heat dissipation according to claim 2, characterized in that, The side turntable (52) is provided with multiple first roller brushes (54) rotating around its edge, and each first roller brush (54) is attached to the surface of the side filter screen (51).

5. A power transformer for easy dust removal and heat dissipation according to claim 4, characterized in that, The first roller brush (54) is fixed with a rubber first friction roller (57) at one end near the outer shell (1), and a first friction ring (58) is fixed around the side filter (51). Each first friction roller (57) is attached to the inner wall of the first friction ring (58).

6. A power transformer for easy dust removal and heat dissipation according to claim 1, characterized in that, The lower air inlet (6) is a plurality of hollow openings distributed in a circle. A ring of lower filter screen (61) is distributed around the lower air inlet (6). The end of the lower filter screen (61) away from the lower air inlet (6) is rotated and covered by a lower turntable (62). The lower air inlet (6) is rotatably provided with a second misaligned disc (63) inside the lower filter screen (61). The second misaligned disc (63) has multiple hollows corresponding to the lower air inlet (6), and the second misaligned disc (63) is fixed to the lower turntable (62). The lower turntable (62) is rotatably equipped with multiple second roller brushes (64) on its edge, and each second roller brush (64) is attached to the surface of the lower filter screen (61); The second roller brush (64) is fixed with a rubber second friction roller (66) at one end near the outer shell (1), and a second friction ring (67) is fixed around the lower filter screen (61). Each second friction roller (66) is attached to the inner wall of the second friction ring (67).

7. A power transformer for easy dust removal and heat dissipation according to claim 6, characterized in that, The lower turntable (62) has a ring of teeth (65) fixed on its edge, and the outer shell (1) has side gears (7) that mesh with the ring of teeth (65) on both sides. Each of the side turntables (52) has a bevel gear ring (55) fixed on its edge, and the lower part of the side gear (7) is rotatably provided with a bevel gear (56) that meshes with it. The side gear (7) has a rotating shaft (71) fixed at its center. The rotating shaft (71) is rotatably connected to the outer casing (1), and the upper end of the rotating shaft (71) is fixed to the bevel gear (56) on the corresponding side.

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