A three-dimensional wound core dry-type transformer

Abstract

The present invention relates to the technical field of three-dimensional rolled iron core transformers, and discloses a three-dimensional rolled iron core dry-type transformer, including a local casing, a three-dimensional rolled iron core assembly is arranged on the lower side of the local casing, a heat dissipation air path is fixedly connected to the lower side of the three-dimensional rolled iron core assembly, an air filter is fixedly installed at the center of the three-dimensional rolled iron core assembly, the air filter is connected to the heat dissipation air path, and the air filter and the local casing are both connected to a self-sealing air port; the air filter comprises a central filter and an external multifunctional component, the upper side of the central filter is connected to the self-sealing air port at the center of the upper side; the central filter comprises a central filter tube; a filter bag and evenly distributed sponge balls are arranged inside the central filter tube. The present invention achieves the purpose of dust removal and dehumidification of the heat dissipation airflow entering the transformer through the cooperation between the heat dissipation air path, the air filter, the self-sealing air port, and the fan.

Description

Technical Field

[0001] The invention relates to the technical field of three-dimensional wound iron core transformers, in particular to a three-dimensional wound iron core dry-type transformer. Background Art

[0002] The 3D wound core dry-type transformer combines the advantages of 3D wound core technology and dry-type transformers. The 3D wound core structure makes the three-phase magnetic circuit completely symmetrical, reduces magnetic resistance and magnetic leakage, and thus significantly reduces no-load loss and load loss. Compared with traditional transformers, its no-load loss can be reduced by 25-35%, and the no-load current can be reduced by up to 92%.

[0003] The existing three-dimensional wound core dry-type transformer, since the cooling and heat dissipation method of the dry-type transformer is natural cooling and air cooling, it depends on air and other non-liquid media. When performing air cooling and heat dissipation, it is necessary to introduce external air into the transformer to contact the wound core and its winding inside, and take away the heat through air circulation. However, the quality of the external air is closely related to the environment and climate. After a long period of air circulation, the external dust and moisture are brought into the transformer, so that the dust will be deposited on the wound core, winding and other key components inside the transformer. The conductive particles in the dust (such as metal dust, carbon particles, etc.) may adhere to the insulation material of the transformer to form a conductive channel, resulting in a decrease in insulation performance. This increases the risk of short circuit, breakdown and other faults of the transformer. At the same time, moisture can easily penetrate into the insulation material of the transformer, causing the insulation material to be damp. The performance of the insulation material after being damp will be significantly reduced, such as reduced dielectric strength and reduced volume resistivity, thereby increasing the risk of insulation failure of the transformer. The water droplets or water film formed by moisture inside the transformer may cause partial discharge and damage the insulation material. Long-term partial discharge will cause the insulation material to gradually age and break down, eventually leading to a short circuit failure. Summary of the invention

[0004] The object of the present invention is to provide a three-dimensional wound core dry-type transformer to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a three-dimensional solid wound core dry-type transformer, comprising a partial casing, a three-dimensional wound core assembly is arranged on the lower side of the partial casing, a heat dissipation air path is fixedly connected to the lower side of the three-dimensional wound core assembly, an air filter is fixedly installed at the center of the three-dimensional wound core assembly, the air filter is connected to the heat dissipation air path, and the air filter and the partial casing are both connected to a self-sealing air port.

[0006] The air filter element comprises a central filter element and an external multifunctional element. The upper side of the central filter element is connected to the self-sealing air port at the center of the upper side. The central filter element comprises a central filter tube.

[0007] The heat dissipation air path includes an air flow inlet pipe, a gas production chamber, a three-way connector, a heat dissipation duct, and a pipeline connecting piece. The central filter tube is connected to the air flow inlet pipe at the lower end, and the other end of the air flow inlet pipe is connected to the gas production chamber. A fan is fixedly installed on the inner side of the gas production chamber. A corresponding heat dissipation duct is arranged on the outer side of the three-dimensional wound iron core assembly, and a three-way connector is arranged on the lower side of the gas production chamber. The gas production chamber, the three-way connector, the heat dissipation duct, and the external multifunctional part are connected through a pipeline connecting piece.

[0008] A filter bag and evenly distributed sponge balls are arranged inside the central filter tube. Gas enters the central filter tube through the self-sealing air port in the center for dust removal and dehumidification, and finally the air flows into the heat dissipation duct and the external multifunctional component.

[0009] External air enters the central filter tube and enters the three sections divided by the inner partition plate. Since the central filter tube is equipped with filter bags and evenly distributed sponge balls, the air flows through the central filter tube and is introduced into the air flow inlet pipe. The dust in the external air is filtered by the filter bags and the moisture is absorbed by the sponge balls.

[0010] Furthermore, the three-dimensional wound iron core assembly includes a protective shell, a three-dimensional iron core, a coil, and a fixed frame. The three-dimensional iron core is arranged on the lower side of the local housing. Three three-dimensional iron cores are arranged about the central array of the local housing to form a triangular structure. Coils are wound on the outer sides of adjacent three-dimensional iron cores. The upper and lower ends of the three-dimensional iron core are fixedly connected to the protective shell, and a fixed frame is fixedly connected between the coil and the protective shell.

[0011] Furthermore, the pipeline connecting part includes a switching tube, an airflow outlet tube 1, and an airflow outlet tube 2. Two switching tubes are connected between the gas production cavity and the three-way connector. The airflow outlet tube 2 is connected between the three-way connector and the heat dissipation duct. The airflow outlet tube 1 is connected between the three-way connector and the external multifunctional part. The heat dissipation gas path corresponds to the three-dimensional wound iron core assembly, and three groups are provided.

[0012] Furthermore, the central filter element also includes a snap-on plate, a sleeve joint, an inner partition plate, and a pipe connector. The lower end of the self-sealing air port is connected to the pipe connector, the lower end of the pipe connector is connected to the sleeve joint, the lower end of the sleeve joint is connected to the central filter tube, the lower end of the central filter tube is connected to the snap-on plate, and an inner partition plate is fixedly installed on the inner side of the central filter tube. The inner partition plate divides the cavity inside the central filter tube into three equal intervals, and the intervals respectively correspond to the airflow outlet pipes.

[0013] Furthermore, the external multifunctional component includes an air filter cartridge, a bottom partition, an outer partition plate, a pipe connector, and a top partition plate. The lower end of the self-sealing air port is connected to the air filter cartridge, the inner bottom of the air filter cartridge is fixedly connected to the bottom partition plate, the inner side of the bottom partition plate is clamped with a clamping plate, the inner side of the air filter cartridge is provided with an outer partition plate, the outer partition plate divides the cavity between the air filter cartridge and the central filter tube into three equal intervals, and the intervals correspond to the three-dimensional rolled core assemblies or the central filter tube respectively. The airflow inlet pipe and the airflow outlet pipe pass through the bottom side wall of the air filter cartridge, the bottom partition plate, and the clamping plate, and the outer side of the sleeve joint is fixedly connected to the top partition plate.

[0014] The air that has been dusted and dehumidified passes through the gas production chamber, the transfer tube, and the three-way connector. The three-way connector then introduces the air into the heat dissipation duct through the air flow outlet pipe 2. The heat dissipation duct guides the air to the three-dimensional iron core and coil inside it for gas circulation and heat dissipation. At the same time, the three-way connector introduces the air into the inner section of the air filter cartridge through the air flow outlet pipe 1. The three air flow outlet pipes 1 correspond to the three sections in the air filter cartridge respectively. Since the outer side of the air filter cartridge is provided with evenly distributed through holes corresponding to its inner section.

[0015] The air in the three sections of the air filter cartridge is discharged outward through the through holes to dissipate heat laterally to the three-dimensional iron core and the innermost components of the coil.

[0016] Furthermore, the self-sealing air ports are provided with four groups, one group of the self-sealing air ports is provided at the center of the local casing for air intake, the other three groups of the self-sealing air ports are provided at the triangle of the local casing for air outlet, the group of the self-sealing air ports located at the center of the local casing is provided inverted with the other three groups of the self-sealing air ports, the self-sealing air ports include a plug, a movable shell, a fixed tube, a connecting ring, and a spring, the upper end of the air filter cartridge and the upper side of the local casing are both connected with a fixed tube, the inner side of the fixed tube is slidably connected with the movable shell, a plug is provided on the inner side of one end of the movable shell, the other end of the movable shell is fixedly connected with a connecting ring, a spring is fixedly connected between the side of the movable shell away from the plug and the inner side wall of the fixed tube, the plugs in the other three groups of the self-sealing air ports are fixedly connected to the local casing via rectangular blocks, and the connecting ring in the group of the self-sealing air ports located at the center of the local casing is fixedly connected to the air filter cartridge.

[0017] The air guided by the heat dissipation duct and the air guided by the air filter cartridge through hole are finally gathered at the upper side corresponding to the triangle of the three-dimensional wound iron core assembly, so that the airflow pushes the corresponding moving shell at the triangle of the local casing, causing the moving shell compression spring to move upward, and then the gap between the moving shell and the plug at the triangle is opened, so that the airflow at the triangle is discharged outward, thereby achieving the purpose of airflow circulation to dissipate heat for the three-dimensional wound iron core assembly.

[0018] Furthermore, the fan includes a blast impeller, a motor, and a base frame. The inner side of the gas production cavity is fixedly connected to the base frame, the other end of the base frame is fixedly connected to the motor, and the output end of the motor is fixedly connected to the blast impeller.

[0019] Start the motor, which drives the blower impeller to rotate, thereby generating wind from the airflow inlet pipe to the transfer pipe. Through the internal wind circulation, the airflow inlet pipe is connected with the central filter pipe, thereby generating suction to the moving shell at the center of the local casing. Since the plug is fixed to the transformer through an external component, when the moving shell moves downward due to the compression spring, the gap between the moving shell and the plug opens, allowing external air to enter the pipe connector.

[0020] Furthermore, an anti-condensation component is fixedly connected to the inner side of the gas producing chamber and to the outer side of the fan, and inner fins and outer fins are sequentially arranged on the outer side of the motor and to the inner side of the gas producing chamber. Both sides of the inner fins and the outer fins are fixedly connected to the inner wall of the gas producing chamber through a fixing ring, and a semiconductor element is fixedly connected between the fixing ring and the outer fin, and the contact surface between the semiconductor element and the outer fin is a cooling surface, and the contact surface between the inner fin and the semiconductor element is a heating surface.

[0021] When the airflow passes through the central filter tube for dust removal and dehumidification, it flows into the gas production chamber and current is passed into the semiconductor element. Since the semiconductor element is formed by connecting a piece of N-type semiconductor material and a piece of P-type semiconductor material together to form a circuit, when a forward voltage is applied, that is, the P-type semiconductor is connected to the positive electrode and the N-type semiconductor is connected to the negative electrode, the current flows from the P-type semiconductor to the N-type semiconductor, causing the temperature of the P-type semiconductor to decrease and the temperature of the N-type semiconductor to increase. Conversely, when a reverse voltage is applied, the current flows in the opposite direction, the temperature of the N-type semiconductor decreases, and the temperature of the P-type semiconductor increases. By controlling the direction and size of the current, the temperature of the semiconductor can be controlled.

[0022] By setting the contact surface between the semiconductor element and the outer fin as the cooling surface, and the contact surface between the inner fin and the semiconductor element as the heating surface, moisture in the air condenses when it comes into contact with the outer fin, and then the water droplets flow to the drain pipe due to gravity. The drain pipe leads to the outside of the transformer, so that the condensed water is discharged outward, and then the gas after the secondary dehumidification is introduced into the heat dissipation duct to dissipate heat for the three-dimensional wound core assembly, thereby avoiding the situation where the primary dehumidification effect is poor due to high humidity in the external environment.

[0023] Furthermore, the lower side of the airflow introduction pipe is connected to a drainage pipe, the outer side of the fixed pipe is provided with evenly distributed through holes, and the top partition plate is provided with evenly distributed circular holes.

[0024] Since the contact surface between the inner fin and the semiconductor element is the heating surface, the heat-dissipating air contains a certain amount of heat, which is introduced into the three compartments inside the air filter cartridge through the air flow outlet pipe. The sponge ball in the central filter tube on the inner side of the hot air has a drying effect, and then the air in the air filter cartridge passes through the top partition and is finally discharged outward through the plug at the center.

[0025] Furthermore, evenly distributed through holes begin to appear on the outside of the air filter cylinder.

[0026] Compared with the prior art, the present invention provides a three-dimensional wound core dry-type transformer, which has the following beneficial effects:

[0027] 1. The three-dimensional wound iron core dry-type transformer, through the cooperation between the heat dissipation air path, the air filter, the self-sealing air port and the fan, can achieve the purpose of dust removal and dehumidification of the heat dissipation airflow entering the transformer, so as to achieve the heat dissipation effect of sealed internal airflow circulation. At the same time, two longitudinal and transverse heat dissipation airflows are used to carry out targeted heat dissipation on the inside and outside of the internal components of the transformer, which greatly improves the heat dissipation effect. At the same time, the three groups of fans are controlled separately, and the triangular heat dissipation wind strength of the three-dimensional wound iron core component can be freely controlled. It has diversity and meets different needs, and solves the existing problem of bringing external dust and moisture into the transformer, which affects the work of the internal components of the transformer.

[0028] 2. The three-dimensional wound iron core dry-type transformer uses an anti-condensation component to perform secondary dehumidification when the humidity of the environment in which the transformer is located is high. At the same time, it has a certain drying ability for the sponge ball of the primary dehumidification, avoiding the situation where the primary dehumidification effect is poor due to the high humidity of the external environment, and meeting the use requirements of different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the three-dimensional wound core assembly of the present invention;

[0032] Figure 4 This is a schematic diagram of a partial three-dimensional structure of Example 2 of the present invention;

[0033] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point A in the middle;

[0034] Figure 6 It is a schematic diagram of a three-dimensional structure of a part of Example 2 of the present invention from another angle;

[0035] Figure 7 It is a schematic diagram of a partial three-dimensional structure of Embodiment 1 of the present invention;

[0036] Figure 8 For the present invention Figure 7 The enlarged schematic diagram of point B in the middle;

[0037] Fig. 9 A schematic diagram of a three-dimensional structure of a part of the first embodiment of the present invention from another angle;

[0038] Fig.10 It is a schematic diagram of the three-dimensional structure of the self-sealing air port of the present invention;

[0039] Fig.11 Schematic diagram of the three-dimensional structure of the air filter element in the first embodiment of the present invention;

[0040] Fig.12 It is a schematic diagram of the three-dimensional structure of the air filter element in the second embodiment of the present invention.

[0041] In the figure: 1, partial housing; 2, three-dimensional coil core assembly; 21, protective housing; 22, three-dimensional core; 23, coil; 24, fixing frame; 3, heat dissipation gas path; 31, air flow inlet pipe; 32, gas production chamber; 33, adapter pipe; 34, three-way connector; 35, air flow outlet pipe 1; 36, air flow outlet pipe 2; 37, heat dissipation duct; 4, air filter; 41, air filter cartridge; 42, bottom partition; 43, clamping plate; 44, outer partition plate ; 45. socket joint; 46. inner partition plate; 47. top partition plate; 48. pipe connector; 49. center filter tube; 5. self-sealing air port; 51. plug; 52. movable shell; 53. fixed pipe; 54. connecting ring; 55. spring; 6. drain pipe; 7. fan; 71. blower impeller; 72. motor; 73. base frame; 8. anti-condensation assembly; 81. inner fin; 82. fixed ring; 83. outer fin; 84. semiconductor element. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1 Please refer to Figure 1 , Figure 3 , Figure 7-Figure 11A three-dimensional wound core dry-type transformer comprises a partial casing 1, a three-dimensional wound core assembly 2 is arranged on the lower side of the partial casing 1, a heat dissipation gas path 3 is fixedly connected to the lower side of the three-dimensional wound core assembly 2, an air filter 4 is fixedly installed at the center of the three-dimensional wound core assembly 2, the air filter 4 is connected to the heat dissipation gas path 3, and the air filter 4 and the partial casing 1 are both connected with a self-sealing air port 5.

[0044] The air filter element 4 includes a central filter element and an external multifunctional element. The upper side of the central filter element is connected to the upper central self-sealing air port 5 ; the central filter element includes a central filter tube 49 .

[0045] The heat dissipation gas path 3 includes an air flow inlet pipe 31, a gas producing chamber 32, a three-way connector 34, a heat dissipation duct 37, and a pipeline connecting piece. The central filter tube 49 is connected to the air flow inlet pipe 31 at the lower end. The other end of the air flow inlet pipe 31 is connected to the gas producing chamber 32. A fan 7 is fixedly installed on the inner side of the gas producing chamber 32. A corresponding heat dissipation duct 37 is arranged on the outer side of the three-dimensional wound iron core assembly 2. A three-way connector 34 is arranged on the lower side of the gas producing chamber 32. The gas producing chamber 32, the three-way connector 34, the heat dissipation duct 37, and the external multifunctional parts are connected to each other through a pipeline connecting piece.

[0046] A filter bag and evenly distributed sponge balls are arranged inside the central filter tube 49. The gas enters the central filter tube 49 through the central self-sealing air port 5 for dust removal and dehumidification, and finally the gas flows into the heat dissipation duct 37 and the external multifunctional component.

[0047] External air enters the central filter tube 49 and enters the three sections divided by the inner partition plate 46. Since the central filter tube 49 is provided with a filter bag and evenly distributed sponge balls, the air flows through the central filter tube 49 and is introduced into the air flow introduction pipe 31. The dust in the external air is filtered by the filter bag and the moisture is absorbed by the sponge balls.

[0048] Furthermore, the three-dimensional wound core assembly 2 includes a protective shell 21, a three-dimensional core 22, a coil 23, and a fixing frame 24. The three-dimensional core 22 is arranged on the lower side of the local housing 1. Three three-dimensional cores 22 are arranged about the central array of the local housing 1 to form a triangular structure. Coils 23 are wound on the outer sides of adjacent three-dimensional cores 22. The upper and lower ends of the three-dimensional core 22 are fixedly connected to the protective shell 21, and a fixing frame 24 is fixedly connected between the coil 23 and the protective shell 21.

[0049] Furthermore, the pipeline connecting parts include a transfer tube 33, an airflow outlet tube 1 35, and an airflow outlet tube 2 36. Two transfer tubes 33 are connected between the gas production cavity 32 and the three-way connector 34. The airflow outlet tube 2 36 is connected between the three-way connector 34 and the heat dissipation duct 37. The airflow outlet tube 1 35 is connected between the three-way connector 34 and the external multifunctional part. The heat dissipation gas path 3 corresponds to the three-dimensional wound iron core assembly 2, and three groups are provided.

[0050] Furthermore, the central filter element also includes a snap-in plate 43, a sleeve joint 45, an inner partition plate 46, and a pipe connector 48. The lower end of the self-sealing air port 5 is connected to the pipe connector 48, the lower end of the pipe connector 48 is connected to the sleeve joint 45, the lower end of the sleeve joint 45 is connected to the central filter tube 49, the lower end of the central filter tube 49 is connected to the snap-in plate 43, and the inner side of the central filter tube 49 is fixedly installed with an inner partition plate 46. The inner partition plate 46 divides the cavity inside the central filter tube 49 into three equal intervals, and the intervals correspond to the air flow outlet pipe 35 respectively.

[0051] Furthermore, the external multifunctional component includes an air filter cartridge 41, a bottom partition plate 42, an outer partition plate 44, a pipe connector 48, and a top partition plate 47. The lower end of the self-sealing air port 5 is connected to the air filter cartridge 41, the bottom of the inner side of the air filter cartridge 41 is fixedly connected to the bottom partition plate 42, the inner side of the bottom partition plate 42 is clamped with a clamping plate 43, and an outer partition plate 44 is provided on the inner side of the air filter cartridge 41. The outer partition plate 44 divides the cavity between the air filter cartridge 41 and the central filter tube 49 into three equal intervals, and the intervals correspond to the three-dimensional wound core assembly 2 or the central filter tube 49 respectively. The airflow inlet pipe 31 and the airflow outlet pipe 35 pass through the bottom side wall of the air filter cartridge 41, the bottom partition plate 42, and the clamping plate 43, and the outer side of the sleeve joint 45 is fixedly connected to the top partition plate 47.

[0052] The air that has been dusted and dehumidified passes through the gas production chamber 32, the transfer tube 33, and the three-way connector 34. Then the three-way connector 34 introduces the air into the heat dissipation duct 37 through the air flow outlet pipe 2 36. The heat dissipation duct 37 guides the air to perform gas circulation and heat dissipation on the three-dimensional iron core 22 and the coil 23 inside. At the same time, the three-way connector 34 introduces the air into the inner section of the air filter cartridge 41 through the air flow outlet pipe 1 35. The three air flow outlet pipes 1 35 correspond to the three sections in the air filter cartridge 41 respectively. Since the outer side of the air filter cartridge 41 is provided with evenly distributed through holes corresponding to its inner section.

[0053] The air in the three sections of the air filter cartridge 41 is discharged outward through the through holes to dissipate heat laterally to the innermost components of the three-dimensional iron core 22 and the coil 23 .

[0054] Furthermore, four groups of self-sealing air ports 5 are provided, one group of self-sealing air ports 5 is provided at the center of the local housing 1 for air intake, and the other three groups of self-sealing air ports 5 are provided at the triangle of the local housing 1 for air outlet. The group of self-sealing air ports 5 located at the center of the local housing 1 is inverted with the other three groups of self-sealing air ports 5. The self-sealing air ports 5 include a plug 51, a movable housing 52, a fixed pipe 53, a connecting ring 54, and a spring 55. The upper end of the air filter cartridge 41 is connected to the upper side of the local housing 1 by a fixed pipe 54. 3. A movable shell 52 is slidably connected to the inner side of the fixed tube 53, a plug 51 is arranged on the inner side of one end of the movable shell 52, a connecting ring 54 is fixedly connected to the other end of the movable shell 52, a spring 55 is fixedly connected between the side of the movable shell 52 away from the plug 51 and the inner side wall of the fixed tube 53, the plugs 51 in the other three groups of self-sealing air ports 5 are fixedly connected to the local casing 1 through rectangular blocks, and the connecting ring 54 in one group of self-sealing air ports 5 located at the center of the local casing 1 is fixedly connected to the air filter cartridge 41.

[0055] The air guided by the heat dissipation duct 37 and the air guided by the through hole of the air filter cartridge 41 are finally gathered at the upper side corresponding to the triangle of the three-dimensional wound core assembly 2, so that the airflow pushes the corresponding movable shell 52 at the triangle of the local casing 1, so that the movable shell 52 compresses the spring 55 to move upward, and then the gap between the movable shell 52 and the plug 51 at the triangle is opened, so that the airflow at the triangle is discharged outward, thereby achieving the purpose of heat dissipation of the three-dimensional wound core assembly 2 by air circulation.

[0056] Furthermore, the fan 7 includes a blower impeller 71, a motor 72, and a base frame 73. The base frame 73 is fixedly connected to the inner side of the gas production chamber 32, the other end of the base frame 73 is fixedly connected to the motor 72, and the output end of the motor 72 is fixedly connected to the blower impeller 71.

[0057] Start the motor 72, which drives the blower impeller 71 to rotate, thereby generating wind from the airflow inlet pipe 31 to the transfer pipe 33. Through the internal wind circulation, the airflow inlet pipe 31 is connected to the central filter pipe 49, thereby generating suction on the movable shell 52 at the center of the local casing 1. Since the plug 51 is fixed to the transformer by an external component, when the movable shell 52 moves downward due to the compression spring 55, the gap between the movable shell 52 and the plug 51 is opened, allowing external air to enter the pipe connector 48.

[0058] Furthermore, evenly distributed through holes begin to appear on the outer side of the air filter cartridge 41 .

[0059] Example 2 Please refer to Figure 2-Figure 6 , Fig.10 , Fig.12The difference between the second embodiment and the first embodiment is that an anti-condensation component 8 is fixedly connected to the inner side of the gas producing chamber 32 and the outer side of the fan 7, and an inner fin 81 and an outer fin 83 are sequentially arranged on the outer side of the motor 72 and the inner side of the gas producing chamber 32. Both sides of the inner fin 81 and the outer fin 83 are fixedly connected to the inner wall of the gas producing chamber 32 through a fixing ring 82. A semiconductor element 84 is fixedly connected between the fixing ring 82 and the outer fin 83. The contact surface between the semiconductor element 84 and the outer fin 83 is a cooling surface, and the contact surface between the inner fin 81 and the semiconductor element 84 is a heating surface.

[0060] When the airflow passes through the central filter tube 49 for dust removal and dehumidification, it flows into the gas production chamber 32, and current is passed into the semiconductor element 84. Since the semiconductor element 84 is formed by connecting a piece of N-type semiconductor material and a piece of P-type semiconductor material together to form a circuit, when a forward voltage is applied, that is, the P-type semiconductor is connected to the positive electrode and the N-type semiconductor is connected to the negative electrode, the current flows from the P-type semiconductor to the N-type semiconductor, causing the temperature of the P-type semiconductor to decrease and the temperature of the N-type semiconductor to increase. Conversely, when a reverse voltage is applied, the current flows in the opposite direction, the temperature of the N-type semiconductor decreases, and the temperature of the P-type semiconductor increases. By controlling the direction and magnitude of the current, the temperature of the semiconductor can be controlled.

[0061] By setting the contact surface between the semiconductor element 84 and the outer fin 83 as a cooling surface, and the contact surface between the inner fin 81 and the semiconductor element 84 as a heating surface, moisture in the air condenses when it contacts the outer fin 83, and then the water droplets flow to the drain pipe 6 due to gravity. The drain pipe 6 leads to the outside of the transformer, so that the condensed water is discharged to the outside, and then the gas after the secondary dehumidification is introduced into the heat dissipation duct 37 to dissipate heat for the three-dimensional wound core assembly 2, thereby avoiding the situation where the primary dehumidification effect is poor due to high humidity in the external environment.

[0062] Furthermore, the lower side of the airflow introduction pipe 31 is connected to the drainage pipe 6 , the outer side of the fixed pipe 53 is provided with evenly distributed through holes, and the top partition plate 47 is provided with evenly distributed circular holes.

[0063] Since the contact surface between the inner fin 81 and the semiconductor element 84 is a heating surface, the heat dissipated air contains a certain amount of heat, which is introduced into the three compartments inside the air filter cartridge 41 through the air flow outlet pipe 35. The sponge ball in the central filter tube 49 on the inner side of the hot air has a drying effect, and then the air in the air filter cartridge 41 passes through the top partition plate 47 and is finally discharged outward through the plug 51 at the center.

[0064] The specific usage and function of this embodiment.

[0065] When in use, the external shell first wraps the device and forms a complete three-dimensional wound iron core dry-type transformer with other external transformer components.

[0066] When the transformer is running, the motor 72 is started, and the motor 72 drives the blower impeller 71 to rotate, thereby generating wind force from the air flow inlet pipe 31 to the transfer pipe 33. Through the internal wind circulation, the air flow inlet pipe 31 is connected with the central filter pipe 49, thereby generating suction force on the moving shell 52 at the center of the local casing 1. Since the plug 51 is fixed to the transformer by an external component, when the moving shell 52 moves downward due to the compression spring 55, the gap between the moving shell 52 and the plug 51 is opened, allowing external air to enter the pipe connector 48.

[0067] Then the external air enters the central filter tube 49 and enters the three sections divided by the inner partition plate 46. Since the central filter tube 49 is provided with a filter bag and evenly distributed sponge balls, the air flows through the central filter tube 49 and is introduced into the air flow inlet pipe 31. The dust in the external air is filtered by the filter bag and the moisture is absorbed by the sponge balls.

[0068] The air that has been dusted and dehumidified passes through the gas production chamber 32, the transfer tube 33, and the three-way connector 34. Then the three-way connector 34 introduces the air into the heat dissipation duct 37 through the air flow outlet pipe 2 36. The heat dissipation duct 37 guides the air to perform gas circulation and heat dissipation on the three-dimensional iron core 22 and the coil 23 inside. At the same time, the three-way connector 34 introduces the air into the inner section of the air filter cartridge 41 through the air flow outlet pipe 1 35. The three air flow outlet pipes 1 35 correspond to the three sections in the air filter cartridge 41 respectively. Since the outer side of the air filter cartridge 41 is provided with evenly distributed through holes corresponding to its inner section.

[0069] Then, the air in the three sections of the air filter cartridge 41 is discharged outward through the through holes to dissipate heat laterally to the innermost components of the three-dimensional iron core 22 and the coil 23 .

[0070] The air guided by the heat dissipation duct 37 and the air guided by the through hole of the air filter cartridge 41 are finally gathered at the upper side corresponding to the triangle of the three-dimensional wound core assembly 2, so that the airflow pushes the corresponding movable shell 52 at the triangle of the local casing 1, so that the movable shell 52 compresses the spring 55 to move upward, and then the gap between the movable shell 52 and the plug 51 at the triangle is opened, so that the airflow at the triangle is discharged outward, thereby achieving the purpose of heat dissipation of the three-dimensional wound core assembly 2 by air circulation.

[0071] When the humidity of the transformer environment is high, an anti-condensation component 8 is added to the gas production cavity 32, the through hole on the outside of the air filter cylinder 41 is cancelled, evenly distributed circular holes are opened on the top partition 47, and evenly distributed through holes are opened on the outside of the plug 51 at the center.

[0072] When the airflow passes through the central filter tube 49 for dust removal and dehumidification, it flows into the gas production chamber 32, and current is passed into the semiconductor element 84. Since the semiconductor element 84 is formed by connecting a piece of N-type semiconductor material and a piece of P-type semiconductor material together to form a circuit, when a forward voltage is applied, that is, the P-type semiconductor is connected to the positive electrode and the N-type semiconductor is connected to the negative electrode, the current flows from the P-type semiconductor to the N-type semiconductor, causing the temperature of the P-type semiconductor to decrease and the temperature of the N-type semiconductor to increase. Conversely, when a reverse voltage is applied, the current flows in the opposite direction, the temperature of the N-type semiconductor decreases, and the temperature of the P-type semiconductor increases. By controlling the direction and magnitude of the current, the temperature of the semiconductor can be controlled.

[0073] By setting the contact surface between the semiconductor element 84 and the outer fin 83 as a cooling surface, and the contact surface between the inner fin 81 and the semiconductor element 84 as a heating surface, moisture in the air condenses when it contacts the outer fin 83, and then the water droplets flow to the drain pipe 6 due to gravity. The drain pipe 6 leads to the outside of the transformer, so that the condensed water is discharged to the outside, and then the gas after the secondary dehumidification is introduced into the heat dissipation duct 37 to dissipate heat for the three-dimensional wound core assembly 2, thereby avoiding the situation where the primary dehumidification effect is poor due to high humidity in the external environment.

[0074] At the same time, since the contact surface between the inner fin 81 and the semiconductor element 84 is a heating surface, the heat dissipated air has a certain amount of heat, which is introduced into the three compartments inside the air filter cartridge 41 through the air flow outlet pipe 35. The sponge ball in the central filter tube 49 on the inner side of the hot air has a drying effect, and then the air in the air filter cartridge 41 passes through the top partition plate 47 and is finally discharged outward through the plug 51 at the center.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional wound core dry-type transformer, comprising a partial housing (1), a three-dimensional wound core assembly (2) being arranged on the lower side of the partial housing (1), characterized in that: A heat dissipation air path (3) is fixedly connected to the lower side of the three-dimensional wound core assembly (2), an air filter (4) is fixedly installed at the center of the three-dimensional wound core assembly (2), the air filter (4) is connected to the heat dissipation air path (3), and the air filter (4) and the local housing (1) are both connected by a self-sealing air port (5); The air filter element (4) comprises a central filter element and an external multifunctional element, the upper side of the central filter element is connected to the self-sealing air port (5) at the center of the upper side; the central filter element comprises a central filter tube (49); The heat dissipation gas path (3) comprises an airflow introduction pipe (31), an air production chamber (32), a three-way connector (34), a heat dissipation conduit (37), and a pipeline connecting piece; the central filter tube (49) is connected to the airflow introduction pipe (31) at its lower end; the other end of the airflow introduction pipe (31) is connected to the air production chamber (32); a fan (7) is fixedly installed on the inner side of the air production chamber (32); a corresponding heat dissipation conduit (37) is arranged on the outer side of the three-dimensional wound core assembly (2); a three-way connector (34) is arranged on the lower side of the air production chamber (32); the air production chamber (32), the three-way connector (34), the heat dissipation conduit (37), and the external multifunctional component are connected to each other via a pipeline connecting piece; A filter bag and evenly distributed sponge balls are arranged inside the central filter tube (49), and gas enters the central filter tube (49) through the central self-sealing air port (5) for dust removal and dehumidification, and finally the gas flows into the heat dissipation conduit (37) and the external multifunctional component.

2. A three-dimensional wound core dry-type transformer according to claim 1, characterized in that: The three-dimensional wound core assembly (2) comprises a protective shell (21), a three-dimensional core (22), a coil (23), and a fixing frame (24). The three-dimensional core (22) is arranged on the lower side of the local housing (1). Three three-dimensional cores (22) are arranged in a central array with respect to the local housing (1) to form a triangular structure. Coils (23) are wound on the outer sides of adjacent three-dimensional cores (22). The upper and lower ends of the three-dimensional core (22) are fixedly connected to the protective shell (21), and a fixing frame (24) is fixedly connected between the coil (23) and the protective shell (21).

3. The three-dimensional wound core dry-type transformer according to claim 1, characterized in that: The pipeline connecting part comprises a transfer tube (33), an air flow outlet tube 1 (35), and an air flow outlet tube 2 (36); the two transfer tubes (33) are connected between the gas production cavity (32) and the three-way connector (34); the air flow outlet tube 2 (36) is connected between the three-way connector (34) and the heat dissipation conduit (37); the air flow outlet tube 1 (35) is connected between the three-way connector (34) and the external multifunctional part; the heat dissipation gas path (3) corresponds to the three-dimensional wound iron core assembly (2), and three groups are provided.

4. The three-dimensional wound core dry-type transformer according to claim 2, characterized in that: The central filter element further comprises a snap-on plate (43), a sleeve joint (45), an inner partition plate (46), and a pipe connector (48); the lower end of the self-sealing air port (5) is connected to the pipe connector (48); the lower end of the pipe connector (48) is connected to the sleeve joint (45); the lower end of the sleeve joint (45) is connected to the central filter tube (49); the lower end of the central filter tube (49) is connected to the snap-on plate (43); the inner side of the central filter tube (49) is fixedly mounted with an inner partition plate (46); the inner partition plate (46) divides the cavity inside the central filter tube (49) into three equal sections, each of which corresponds to the air flow outlet tube 1 (35).

5. The three-dimensional wound core dry-type transformer according to claim 4, characterized in that: The external multifunctional component comprises an air filter cartridge (41), a bottom partition plate (42), an outer partition plate (44), a pipe connector (48), and a top partition plate (47); the lower end of the self-sealing air port (5) is connected to the air filter cartridge (41); the bottom inner side of the air filter cartridge (41) is fixedly connected to the bottom partition plate (42); the inner side of the bottom partition plate (42) is clamped with a clamping plate (43); the inner side of the air filter cartridge (41) is provided with an outer partition plate (44); the outer partition plate (44) divides the cavity between the air filter cartridge (41) and the central filter tube (49) into three equal sections, the sections corresponding to the three-dimensional wound core assembly (2) or the central filter tube (49), respectively; the air flow inlet pipe (31) and the air flow outlet pipe (35) penetrate the bottom side wall of the air filter cartridge (41), the bottom partition plate (42), and the clamping plate (43); the outer side of the sleeve joint (45) is fixedly connected to the top partition plate (47).

6. The three-dimensional wound core dry-type transformer according to claim 5, characterized in that: Four groups of the self-sealing air ports (5) are provided, one group of the self-sealing air ports (5) is provided at the center of the local housing (1) for air intake, and the other three groups of the self-sealing air ports (5) are provided at the triangle of the local housing (1) for air discharge. The group of the self-sealing air ports (5) located at the center of the local housing (1) is arranged inverted with the other three groups of the self-sealing air ports (5). The self-sealing air ports (5) include a plug (51), a movable housing (52), a fixed pipe (53), a connecting ring (54), and a spring (55). The upper end of the air filter cartridge (41) and the upper side of the local housing (1) are both connected by the fixed pipe (53). A movable shell (52) is slidably connected to the inner side of the fixed tube (53); a plug (51) is provided on the inner side of one end of the movable shell (52); a connecting ring (54) is fixedly connected to the other end of the movable shell (52); a spring (55) is fixedly connected between the side of the movable shell (52) away from the plug (51) and the inner side wall of the fixed tube (53); the plugs (51) in the other three groups of the self-sealing air ports (5) are fixedly connected to the local housing (1) via rectangular blocks; and the connecting ring (54) in the group of the self-sealing air ports (5) located at the center of the local housing (1) is fixedly connected to the air filter cartridge (41).

7. The three-dimensional wound core dry-type transformer according to claim 1, characterized in that: The fan (7) comprises a blast impeller (71), a motor (72), and a base frame (73); the base frame (73) is fixedly connected to the inner side of the gas production cavity (32); the other end of the base frame (73) is fixedly connected to the motor (72); and the output end of the motor (72) is fixedly connected to the blast impeller (71).

8. The three-dimensional wound core dry-type transformer according to claim 7, characterized in that: An anti-condensation component (8) is fixedly connected to the inner side of the gas-generating cavity (32) and the outer side of the fan (7); an inner fin (81) and an outer fin (83) are sequentially arranged on the outer side of the motor (72) and the inner side of the gas-generating cavity (32); both sides of the inner fin (81) and the outer fin (83) are fixedly connected to the inner side wall of the gas-generating cavity (32) via a fixing ring (82); a semiconductor element (84) is fixedly connected between the fixing ring (82) and the outer fin (83); a contact surface between the semiconductor element (84) and the outer fin (83) is a cooling surface, and a contact surface between the inner fin (81) and the semiconductor element (84) is a heating surface.

9. The three-dimensional wound core dry-type transformer according to claim 6, characterized in that: The lower side of the airflow introduction pipe (31) is connected to a drainage pipe (6), the outer side of the fixed pipe (53) is provided with evenly distributed through holes, and the top partition plate (47) is provided with evenly distributed circular holes.

10. The three-dimensional wound core dry-type transformer according to claim 5, characterized in that: The outer side of the air filter cylinder (41) begins to have evenly distributed through holes.

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