Transformer

Abstract

The invention relates to the technical field of power equipment, in particular to a transformer. The transformer comprises a shell and a fan assembly, the fan assembly comprises a cooling fan exhausting air back to the shell, and an air regulator is arranged on the side, back to the shell, of the cooling fan and comprises an air guide channel. The air guide channel comprises an inlet corresponding to the cooling fan, a same-direction air opening corresponding to the inlet, and a reverse-direction air opening which is staggered with the same-direction air opening and is opposite to the same-direction air opening in direction, and an air door is arranged at the same-direction air opening. The air door has an opening state of opening the same-direction air port under the condition that the external air direction is the same as the exhaust direction of the cooling fan, and a closing state of closing the same-direction air port under the condition that the external air direction is opposite to the exhaust direction of the cooling fan, and when the air door is opened, air of the cooling fan is exhausted from the same-direction air port; when the air door is closed, air of the cooling fan is guided by the air guide channel to be exhausted from the reverse air opening. Hot air is exhausted along the direction of external natural wind, and external upwind is not easy to influence the exhaust capacity of the cooling fan, so that the cooling effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a transformer. Background Art

[0002] A transformer is an electrical device that uses the principle of electromagnetic induction to change AC voltage. An oil-immersed transformer is a transformer that uses oil as the main insulation means and relies on oil as a cooling medium. The body of the oil-immersed transformer is installed in an oil tank filled with transformer oil, which is also the outer shell of the transformer.

[0003] Since the current and voltage inside the transformer are at a high level, the heat dissipated by the coil conductor is relatively high. The heat exchange between the transformer oil and the shell alone cannot meet the heat dissipation needs. Therefore, heat sinks are usually densely distributed on the side of the transformer shell to increase the heat dissipation area. For example, a transformer disclosed in the Chinese utility model patent with the authorization announcement number CN218241514U has heat conducting plates on both sides of the transformer body, which are heat sinks. Multiple heat conducting plates are arranged side by side on the same side. In order to further enhance the heat dissipation effect, a heat dissipation fan is also arranged on the outside of the heat sink on the side of the transformer. After the heat sink removes the heat from the transformer, the heat dissipation fan blows air outward to remove the heat in time. The wind from the heat dissipation fan mainly forms airflow, and the wind force is usually relatively small.

[0004] For transformers used in outdoor environments, the direction of the external natural wind may be the same as or opposite to the exhaust direction of the cooling fan. In some areas, the wind is relatively strong. When the cooling fan is subject to a relatively strong headwind, the wind force of the cooling fan will be offset by the natural wind, affecting the smooth discharge of the airflow. The heat of the outer area of ​​the large heat sink covered by the cooling fan will be hindered, affecting the heat dissipation effect. In addition, the headwind will increase the load of the cooling fan and increase energy consumption. Summary of the invention

[0005] The object of the present invention is to provide a transformer to solve the problem that the heat dissipation effect of the current transformer using a heat dissipation fan for heat dissipation is easily affected by external headwind.

[0006] The technical solution of the transformer of the present invention is: A transformer comprises a shell and a fan assembly arranged at a side of the shell, the fan assembly comprises a heat dissipation fan which exhausts air facing away from the shell, a wind regulator is arranged on the side of the heat dissipation fan facing away from the shell, the wind regulator comprises an air guide channel, the air guide channel comprises an inlet corresponding to the heat dissipation fan, a same-direction air outlet corresponding to the inlet, and a reverse air outlet which is staggered with the same-direction air outlet and faces oppositely, a damper is arranged at the same-direction air outlet, the damper has an open state in which the same-direction air outlet is opened when the external wind direction is the same as the exhaust direction of the heat dissipation fan, and a closed state in which the same-direction air outlet is closed when the external wind direction is opposite to the exhaust direction of the heat dissipation fan, when the damper is open, the air of the heat dissipation fan is exhausted from the same-direction air outlet, and when the damper is closed, the air of the heat dissipation fan is guided through the air guide channel and discharged from the reverse air outlet.

[0007] Beneficial effect: The present invention is an improvement on the transformer in the prior art. The function of adjusting the air flow direction is achieved by arranging an air regulator on one side of the cooling fan. The cooling fan exhausts air with its back to the casing, and the heat is discharged into the air guide channel of the air regulator along with the air flow. If the wind direction of the external natural wind is the same as the exhaust direction of the cooling fan, the air door can be opened to allow the wind from the cooling fan to be discharged directly through the same-direction air port of the air guide channel. If the wind direction of the external natural wind is opposite to the exhaust direction of the cooling fan, the air door can be closed to allow the wind from the cooling fan to be discharged from the reverse air port after being guided by the air guide channel. The cooling fan can exhaust air smoothly through the reverse air door, and the air outlet direction of the air regulator is consistent with the wind direction of the external natural wind, so that the hot air is discharged along the wind direction of the external natural wind. The external headwind is not easy to affect the exhaust capacity of the cooling fan, which is beneficial to ensuring the heat dissipation effect.

[0008] Furthermore, the rotation axis of the damper extends in the up and down directions, and the damper has an outer windward surface and an inner windward surface. The outer windward surface is used to make the damper close the same-direction air outlet under the action of external headwind opposite to the exhaust direction of the cooling fan, and the inner windward surface is used to make the damper open the same-direction air outlet under the action of the wind of the cooling fan when the external wind direction is the same as the exhaust direction of the cooling fan.

[0009] Furthermore, a windward plate is rotatably provided at the end of the air regulator, and the windward plate is connected to the damper through a linkage transmission mechanism. The windward plate has an upwind windward surface, and the upwind windward surface is used to rotate the windward plate under the action of external headwind opposite to the exhaust direction of the cooling fan and apply a closing force to the damper through the linkage transmission mechanism.

[0010] Furthermore, the windward plate rotates in opposite directions to the damper.

[0011] Furthermore, the linkage transmission mechanism includes a linkage swing arm arranged on the damper, a transmission swing arm arranged on the windward plate, and a transmission connecting rod guided on the side wall of the wind guide channel. Long holes are respectively provided on the linkage swing arm and the transmission swing arm. A guide column extending into the corresponding long hole is provided on the transmission connecting rod, so that when the windward plate rotates, the transmission connecting rod can be translated by cooperating with the corresponding guide column through the long hole on the transmission swing arm, and the transmission connecting rod drives the damper to rotate by cooperating with the long hole on the linkage swing arm through the corresponding guide column.

[0012] Furthermore, a plurality of dampers are provided, and the dampers are connected by transmission connecting rods.

[0013] Furthermore, a transmission connecting rod is arranged on the side wall of the air guide channel, a linkage swing arm is provided on the air door, a long hole is provided on the linkage swing arm, and a guide column extending into the corresponding long hole is provided on the transmission connecting rod, so that the air doors can rotate synchronously through the linkage swing arms of each air door and the transmission connecting rod.

[0014] Furthermore, the air guide channel has a turning section located between the same-direction air outlet and the reverse air outlet, and a blocking door is provided at the turning section. The blocking door has a closed state in which the turning section is closed when the air door is opened, and an open state in which the turning section is opened when the air door is closed.

[0015] Further, the blocking door is connected to the corresponding damper, and the blocking door rotates when the damper rotates.

[0016] Furthermore, a heat sink is provided on the outer shell, and the reverse air outlet has a portion staggered from the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of a transformer of the present invention; Figure 2 for Figure 1 Schematic diagram without the air register; Figure 3 for Figure 1 A schematic diagram of the coordination structure of the air register, the fan assembly and the heat sink; Figure 4 for Figure 1 Schematic diagram of the air register with the damper open; Figure 5 for Figure 4 A schematic diagram of the transmission connection structure between each damper and the windward plate; Figure 6 for Figure 3 Schematic diagram of the installation structure of the windward plate; Figure 7 for Figure 5 Schematic diagram of the matching relationship between the transmission connecting rod and the wind cover.

[0018] In the figure: 1. casing; 2. heat sink; 3. mounting bracket; 4. cooling fan; 5. air register; 51. wind hood; 5101. bottom wall of air duct; 5102. guide hole; 52. same direction air outlet; 53. reverse air outlet; 54. air door; 55. windward plate; 56. blocking door; 57. steering section; 58. linkage swing arm; 59. transmission swing arm; 510. transmission connecting rod; 511. transmission guide column; 512. linkage guide column. DETAILED DESCRIPTION

[0019] The transformer of the present invention realizes the function of adjusting the airflow direction by arranging an air regulator on one side of the cooling fan, and utilizes two air outlets facing opposite directions in conjunction with an openable and closable air door to discharge hot air along the wind direction of the external natural wind, thereby preventing the external headwind from affecting the cooling effect of the cooling fan.

[0020] The present invention is specifically described below with reference to the embodiments.

[0021] Embodiments of the transformer of the present invention: The transformer is an oil-immersed laminated core transformer. Figure 1 , Figure 2 As shown, the transformer includes a housing 1, the housing 1 is filled with oil, and the transformer body is located in the housing 1 and immersed in the oil. The housing 1 is a square box structure as a whole, with four side surfaces, a top surface, and a bottom surface. The bottom surface is fixedly mounted on a corresponding fixed foundation, and the side surface is a vertical surface. Two of the four side surfaces are provided with heat sinks 2 respectively. The heat sinks 2 are vertically arranged, and multiple heat sinks 2 are provided on the same side. The heat sinks 2 on the same side are arranged at intervals, and the upper and lower ends of each heat sink 2 are flush. The heat sink 2 can increase the heat dissipation area.

[0022] In order to dissipate the heat from the heat sink 2 area in time, a fan assembly is provided on the side of the shell 1, and the fan assembly includes a mounting bracket 3 and a cooling fan 4 fixed on the mounting bracket 3. The mounting bracket 3 includes a fixed arm and a mounting plate, one end of the fixed arm is fixed to the side of the shell 1, and the other end is connected to the mounting plate. The mounting plate is a rectangular plate, and fixed arms are connected to its four corners. Each heat sink 2 is located between the fixed arms at both ends of the mounting plate, the mounting plate is located on the side of the heat sink 2 away from the shell 1, and a space for installing the cooling fan 4 is provided between the mounting plate and the heat sink 2. The cooling fan 4 is installed on a side surface of the mounting plate facing the heat sink 2, and a avoidance opening corresponding to the fan blades of the cooling fan 4 is provided on the mounting plate, with the side of the heat sink 2 away from the shell 1 as the outer side, and the cooling fan 4 exhausts air with its back to the shell 1, that is, the cooling fan 4 exhausts air outward, so that the hot air flows to the side of the cooling fan 4 away from the heat sink 2.

[0023] In this embodiment, two cooling fans 4 are provided on the same side, and the side-by-side direction of the two cooling fans 4 on the same side is the same as the side-by-side direction of the heat sinks 2. Two avoidance openings corresponding to the two cooling fans 4 are provided on the mounting plate of the mounting bracket 3, and the two cooling fans 4 on the same side are used to dissipate heat for the heat sinks 2 on the same side.

[0024] In order to prevent the external headwind from affecting the heat dissipation effect of the heat dissipation fan 4, a wind regulator 5 is provided on the side of the heat dissipation fan 4 facing away from the housing 1. Figure 3 , Figure 4 The air regulator 5 includes a hood 51, which is used to form an air guide channel. The air guide channel includes an inlet corresponding to the cooling fan 4, a same-direction air outlet 52 corresponding to the inlet, and a reverse air outlet 53 staggered from the same-direction air outlet 52 and facing oppositely. A damper 54 is provided at the same-direction air outlet 52. The damper 54 has an open state in which the same-direction air outlet 52 is opened when the external wind direction is the same as the exhaust direction of the cooling fan 4, and a closed state in which the same-direction air outlet 52 is closed when the external wind direction is opposite to the exhaust direction of the cooling fan 4. When the damper 54 is open, the wind of the cooling fan 4 is discharged from the same-direction air outlet 52, and when the damper 54 is closed, the wind of the cooling fan 4 is guided through the air guide channel and discharged from the reverse air outlet 53.

[0025] The inlet of the air guide channel is directly opposite to the fan blade of the heat dissipation fan 4 and directly opposite to the corresponding avoidance opening on the mounting plate of the mounting bracket 3. The wind of the heat dissipation fan 4 enters the wind cover 51 through the avoidance opening, and the inlet of the wind cover 51 covers the corresponding avoidance opening. Each heat dissipation fan 4 is equipped with an air regulator 5, and the air regulators 5 of the two heat dissipation fans 4 on the same side are symmetrically arranged. The air regulator 5 is fixedly mounted on the side of the mounting bracket 3 facing away from the heat dissipation fan 4, and the wind cover 51 is fixed to the outer side of the mounting plate of the mounting bracket 3. The wind cover 51 is generally square in structure. The same-direction air outlet 52 of the air guide channel is arranged on the side of the wind cover 51 facing away from the heat dissipation fan 4. The same-direction air outlet 52 faces the side of the wind cover 51 facing away from the outer shell 1, and the inlet of the air guide channel and the same-direction air outlet 52 are opposite inside and outside. The reverse air outlet 53 faces the side of the wind cover 51 facing the outer shell 1. The direction of the reverse air outlet 53 and the same-direction air outlet 52 is the direction in which the air flow is discharged from the corresponding air outlet.

[0026] By arranging an air regulator 5 on one side of the cooling fan 4, the function of adjusting the air flow direction can be achieved. The cooling fan 4 exhausts air with its back to the casing 1, and the heat is discharged into the air guide channel of the air regulator 5 along with the air flow. If the wind direction of the external natural wind is the same as the exhaust direction of the cooling fan 4, that is, when it is a tailwind, the air door 54 can be opened to allow the wind from the cooling fan 4 to be directly discharged through the same-direction air outlet 52 of the air guide channel. If the wind direction of the external natural wind is opposite to the exhaust direction of the cooling fan 4, that is, when it is a headwind, the air door 54 can be closed to allow the wind from the cooling fan 4 to be discharged from the reverse air outlet 53 after being guided by the air guide channel. The cooling fan 4 can exhaust air smoothly through the reverse air door 54, and the air outlet direction of the air regulator 5 is consistent with the wind direction of the external natural wind, so that the hot air is discharged along the wind direction of the external natural wind. The external headwind is not easy to affect the exhaust capacity of the cooling fan 4, which is beneficial to ensuring the heat dissipation effect.

[0027] The damper 54 is rotatably mounted on the part of the hood 51 where the same-direction air outlet 52 is set. The rotation axis of the damper 54 extends in the up-down direction. The rotatable mounting structure of the damper 54 can be realized by setting a rotating shaft at one end of the damper 54 or by using a hinge. The damper 54 is mounted on one side edge of the same-direction air outlet 52. The same-direction air outlet 52 is a rectangular opening. The damper 54 is generally a rectangular plate. When the damper 54 is closed, it can cover the same-direction air outlet 52. When the damper 54 is opened, it can open the same-direction air outlet 52 to form an airflow channel. The damper 54 can be set to be fully opened or partially opened according to the situation. In this embodiment, the damper 54 is shown as being partially opened when it is in the open state. The damper 54 is set at an acute angle with the outer side surface of the hood 51 to meet the airflow passage.

[0028] The damper 54 has an outer windward surface and an inner windward surface, wherein the outer windward surface is the side facing away from the same-direction air outlet 52, and the inner windward surface is the side facing the same-direction air outlet 52. The outer windward surface is used to close the same-direction air outlet 52 under the effect of external headwind opposite to the exhaust direction of the heat dissipation fan 4, and the inner windward surface is used to open the same-direction air outlet 52 under the effect of the wind of the heat dissipation fan 4 when the external wind direction is the same as the exhaust direction of the heat dissipation fan 4. When the external natural wind is a favorable wind, the damper 54 can be rotated outward to open the same-direction air outlet 52 under the effect of the wind of the inner heat dissipation fan 4. When the external natural wind is a headwind, the damper 54 can be rotated inward to close the same-direction air outlet 52 under the effect of the headwind with relatively large external wind force. In this way, the automatic opening and closing of the damper 54 can be realized by utilizing the wind of the heat dissipation fan 4 and the external natural wind, with a simple structure and cost saving. This damper 54 is a passive automatic opening and closing form. When closed, the wind force of the natural wind outside should be relatively large, greater than the wind force of the cooling fan 4. In other embodiments, a driving device can also be provided to cooperate with a sensor to drive the damper to actively rotate. The sensor monitors the wind direction and then controls the driving device to drive the damper to perform corresponding opening and closing actions. The driving device can be a motor.

[0029] The end of the air register 5 is rotatably provided with a windward plate 55, which is rotatably mounted on an end of the wind cover 51 away from the same-direction air outlet 52 and the inlet, and the end is staggered with the mounting bracket 3 and the heat sink 2 area, and both the downwind and the headwind from the outside can blow onto the windward plate 55 at the end, and the windward plate 55 has an upwind windward surface and a downwind windward surface opposite to each other, and the downwind from the outside blows onto the downwind windward surface, and the headwind from the outside blows onto the headwind windward surface. The rotation axis of the windward plate 55 extends in the up-down direction, and the windward plate 55 is connected to the damper 54 through a linkage transmission mechanism, and the headwind windward surface is used to rotate the windward plate 55 under the action of the external headwind opposite to the exhaust direction of the heat dissipation fan 4, so that the windward plate 55 applies a closing force to the damper 54 through the linkage transmission mechanism, which is conducive to keeping the damper 54 in a reliable closed state when the external headwind is in the opposite direction. The windward area of ​​the windward plate 55 can be set as needed. Under the effect of favorable wind, the windward plate 55 can exert a force to keep the damper 54 open, which is conducive to keeping the damper 54 open. In other embodiments, the windward plate may not be provided, and only the wind receiving area of ​​the damper itself can be used to open and close.

[0030] The windward plate 55 is rotatably mounted at a corner of the wind shield 51. The windward plate 55 rotates in the opposite direction to the damper 54. When the outside wind is against the wind, while the damper 54 is blown against the wind, the windward plate 55 can rotate under the airflow guided from the outer side of the wind shield 51, and assist the damper 54 in closing, which is conducive to adapting to the wind direction. In other embodiments, the windward plate and the damper can also rotate in the same direction, and the windward plate and the damper are inclined in the same direction relative to the outer side of the wind shield.

[0031] When the damper 54 is open, the damper 54 is tilted outward relative to the outer side of the wind shield 51, and the windward plate 55 is tilted outward relative to the outer side of the wind shield 51, and the damper 54 and the windward plate 55 are respectively facing the two sides. When the damper 54 is closed, the damper 54 covers the same-direction air outlet 52, and the windward plate 55 rotates in the direction away from the side where the damper 54 is located, and rotates to a state parallel to the side of the wind shield 51, so as to withstand the headwind.

[0032] Combination Figure 5 , Figure 6 , Figure 7The linkage transmission mechanism includes a linkage swing arm 58 provided on the damper 54, a transmission swing arm 59 provided on the windward plate 55, and a transmission connecting rod 510 provided on the side wall of the wind guide passage. Long holes are respectively provided on the linkage swing arm 58 and the transmission swing arm 59. A guide column extending into the corresponding long hole is provided on the transmission connecting rod 510. The guide column extending into the long hole of the linkage swing arm 58 is a linkage guide column 512, and the guide column extending into the long hole of the transmission swing arm 59 is a transmission guide column 511. When the windward plate 55 rotates, the transmission connecting rod 510 is driven to translate through the long hole on the transmission swing arm 59 in cooperation with the transmission guide column 511, and the transmission connecting rod 510 drives the damper 54 to rotate through the linkage guide column 512 in cooperation with the long hole on the linkage swing arm 58, so as to realize the linkage between the windward plate 55 and the damper 54. In other embodiments, the linkage transmission mechanism can also be set as a parallelogram mechanism, the damper and the windward plate are set to be in the same direction, and the linkage is achieved by hingedly connecting the two ends of the connecting rod to the bottom of the damper and the windward plate, and the connecting rod is no longer guided. In other embodiments, the transmission swing arm can also be omitted, and the end of the transmission connecting rod close to the windward plate is hinged to the pull rod, and the pull rod is hinged to the bottom of the main body of the windward plate, so that when the windward plate rotates, the pull rod can apply a translation force to the transmission connecting rod.

[0033] There are multiple dampers 54. In this embodiment, the air regulator 5 has three dampers 54. The dampers 54 correspond to the same-direction air outlets 52 one by one. The side-by-side direction of each air outlet is consistent with the side-by-side direction of each heat sink 2. The inlet area of ​​the air guide channel is larger than the area of ​​the same-direction air outlet 52, and the area of ​​the same-direction air outlet 52 is smaller than the area of ​​the reverse air outlet 53. The area of ​​the reverse air outlet 53 is smaller than the inlet area. The dampers 54 are connected together by the transmission connecting rod 510 and can be linked, which is conducive to ensuring the consistency of the dampers 54, and the dampers 54 are more reliable to open and close. The reverse air outlet 53 and the same-direction air outlet 52 are both outlets of the air guide channel. The setting of multiple dampers 54 can make the size of a single damper 54 smaller while ensuring the total outlet area, which is convenient for opening and closing. In other embodiments, only one damper can be set as needed.

[0034] The wind hood 51 has an air duct bottom wall 5101, and the air duct bottom wall 5101 constitutes the lower side wall of the air guide channel. The transmission connecting rod 510 is guided and set on the air duct bottom wall 5101. The edge of the air duct bottom wall 5101 close to the same-direction air outlet 52 is provided with a guide hole 5102. The guide hole 5102 is a long hole structure. The extension direction of the guide hole 5102 is consistent with the extension direction of the transmission connecting rod 510. Each same-direction air outlet 52 is provided with a guide hole 5102. Each linkage guide column 512 on the transmission connecting rod 510 extends into the corresponding guide hole 5102. The guide hole 5102 is used to cooperate with the linkage guide column 512 to guide the movement of the transmission connecting rod 510. The guiding movement direction of the transmission connecting rod 510 is perpendicular to the up and down direction and parallel to the outer side of the shell 1. The linkage guide post 512 passes through the guide hole 5102 and extends into the long hole on the corresponding linkage swing arm 58. The top of the linkage guide post 512 protrudes from the long hole on the linkage swing arm 58 and is provided with a limiting end with a larger diameter to prevent it from slipping out. The long holes on the linkage swing arms 58 of the dampers 54 cooperate with the guide posts on the transmission connecting rod 510 to make the dampers 54 rotate synchronously, which is conducive to the smooth opening and closing of the dampers 54. In other embodiments, only one damper can be provided with a linkage swing arm to cooperate with the transmission connecting rod to be connected to the windward plate, and the three dampers are connected together by a hinged connecting rod at the bottom to realize the synchronous rotation of the dampers.

[0035] The linkage swing arm 58 is arranged at the bottom of the door plate of the damper 54, and the linkage swing arm 58 is arranged obliquely relative to the door plate. The linkage swing arm 58 is located on one side of the rotation axis of the damper 54, and the long hole on the linkage swing arm 58 can limit the rotation stroke of the damper 54. The windward plate 55 includes a main plate body and a rotating shaft arranged at one end of the main plate body, and the rotating shaft is rotatably mounted on the wind cover 51. The corner of the wind cover 51 is provided with a support ear for the installation of the rotating shaft. The rotating shaft extends in the up-down direction, and the lower end of the rotating shaft passes through the lower side support ear of the wind cover 51. A transmission swing arm 59 is fixed to the lower end of the rotating shaft. The transmission swing arm 59 is located on the side of the rotation axis of the windward plate 55 away from the main plate body. The transmission swing arm 59 has two sections at an angle, one section is connected to the rotating shaft, and the other section is provided with a long hole for the transmission guide column 511 to extend into, and the long hole on the transmission swing arm 59 is arranged at an angle to the extension direction of the long hole on the linkage swing arm 58. The main rod body of the transmission link 510 is located at the lower side of the wind shield 51. The transmission guide post 511 of the transmission link 510 disposed at one end close to the windward plate 55 is convex downward. The transmission guide post 511 cooperates with the long hole on the transmission swing arm 59. When the windward plate 55 rotates, the damper 54 rotates in the opposite direction. A return torsion spring is sleeved at the lower end of the rotating shaft of the windward plate 55, which applies a force to the windward plate 55 to apply a force to keep the damper 54 open through the linkage transmission mechanism. The elastic force of the return torsion spring is relatively small and does not affect the closing of the damper 54.

[0036] The air guide channel has a same-direction air outlet section between the entrance and the same-direction air outlet 52 and a reverse air outlet section where the reverse air outlet 53 is located, and also has a turning section 57 between the same-direction air outlet 52 and the reverse air outlet 53. The turning section 57 connects the same-direction air outlet section with the reverse air outlet section. The cross-sectional area of ​​the turning section 57 is smaller than the cross-sectional area of ​​the same-direction air outlet section and the reverse air outlet section. When the damper 54 is closed, the airflow changes direction through the turning section 57 and is introduced into the reverse air outlet section. A blocking door 56 is provided at the turning section 57. The blocking door 56 has a closed state in which the turning section 57 is closed when the damper 54 is opened and an open state in which the turning section 57 is opened when the damper 54 is closed. When the damper 54 is closed and the blocking door 56 is opened, the hot air discharged by the heat dissipation fan 4 can be discharged through the reverse air outlet 53. When the damper 54 is opened and the blocking door 56 is closed, the hot air discharged by the heat dissipation fan 4 can be discharged through the same-direction air outlet 52, and it is conducive to the stability of the airflow. In other embodiments, the blocking door may not be provided.

[0037] The blocking door 56 is connected to the damper 54 closest to the turning section 57. The blocking door 56 is arranged on the side of the rotation axis of the damper 54 away from the door plate. When the damper 54 rotates, the blocking door 56 rotates. The blocking door 56 rotates in the same direction as the damper 54. The blocking door 56 has the same rotation axis as the damper 54. The blocking door 56 is tilted so as to be fixedly connected to the damper 54. The blocking door 56 is linked with the damper 54 to simplify the transmission structure. In other embodiments, the blocking door can also be rotatably installed in the wind cover alone, and the transmission connecting rod is directly connected to the blocking door to drive the blocking door to rotate.

[0038] The heat sink 2 can be set as a hollow structure and communicate with the inner cavity of the shell 1 to enhance the heat exchange capacity with the heat in the shell 1. The reverse air outlet 53 of the air guide channel is staggered with the area where the heat sink 2 is located. The area where the heat sink 2 is located is the space occupied by each heat sink 2, so that the reverse air outlet 53 avoids the heat sink 2 to ensure the heat dissipation effect. The reverse air outlet has a portion staggered with the shell, which reduces the obstruction of the shell to the wind discharged from the reverse air outlet. In other embodiments, the reverse air outlet can also be staggered with the heat sink and face the side of the shell.

[0039] After the insulating oil in the transformer is heated up, the heat is transferred to the heat sink 2 , and the heat dissipation fan 4 sucks and discharges the high-temperature air on the outer surface of the heat sink 2 .

[0040] When the wind direction of the outside wind is opposite to that of the cooling fan 4, the airflow blows the windward plate 55 to deflect, and the damper 54 to deflect, so that the damper 54 closes the same-direction air outlet 52. In this process, the blocking door 56 follows the deflection of the damper 54 to open the reverse air path, and the airflow discharged by the cooling fan 4 is guided by the turning section 57 to change direction and be consistent with the current outside wind direction. When the outside wind direction is the same as the wind direction of the cooling fan 4, the damper 54 opens the same-direction air outlet 52, and the blocking door 56 closes the reverse air path. This can prevent the outside airflow from blowing hot air back to the cooling fan, prevent the reverse airflow from exerting a reverse force on the cooling fan to affect heat dissipation, and prevent the reverse airflow from generating a rotational resistance on the cooling fan to increase the operating energy consumption of the cooling fan 4.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transformer, comprising a housing and a fan assembly arranged on the side of the housing, wherein the fan assembly comprises a heat dissipation fan that exhausts air away from the housing, wherein: A wind regulator is provided on the side of the cooling fan facing away from the outer shell, and the wind regulator includes an air guide channel, the air guide channel includes an inlet corresponding to the cooling fan and a same-direction air outlet corresponding to the inlet, and a reverse air outlet staggered from the same-direction air outlet and facing oppositely, and an air gate is provided at the same-direction air outlet, and the air gate has an open state in which the same-direction air outlet is opened when the outside wind direction is the same as the exhaust direction of the cooling fan, and a closed state in which the same-direction air outlet is closed when the outside wind direction is opposite to the exhaust direction of the cooling fan. When the air gate is open, the air of the cooling fan is discharged from the same-direction air outlet, and when the air gate is closed, the air of the cooling fan is guided through the air guide channel and discharged from the reverse air outlet.

2. The transformer according to claim 1, characterized in that: The rotation axis of the damper extends in the up and down directions, and the damper has an outer windward surface and an inner windward surface. The outer windward surface is used to close the same-direction air outlet under the action of external headwind opposite to the exhaust direction of the cooling fan, and the inner windward surface is used to open the same-direction air outlet under the action of the wind of the cooling fan when the external wind direction is the same as the exhaust direction of the cooling fan.

3. The transformer according to claim 2, characterized in that A windward plate is rotatably provided at the end of the fan, and the windward plate is connected to the damper through a linkage transmission mechanism. The windward plate has an upwind windward surface, which is used to rotate the windward plate under the action of external headwind opposite to the exhaust direction of the cooling fan and apply a closing force to the damper through the linkage transmission mechanism.

4. The transformer according to claim 4, characterized in that: The windward plate rotates in the opposite direction to the damper.

5. The transformer according to claim 3 or 4, characterized in that: The linkage transmission mechanism includes a linkage swing arm arranged on the damper, a transmission swing arm arranged on the windward plate, and a transmission connecting rod guided and arranged on the side wall of the wind guide channel. Long holes are respectively provided on the linkage swing arm and the transmission swing arm. A guide column extending into the corresponding long hole is provided on the transmission connecting rod, so that when the windward plate rotates, the long hole on the transmission swing arm cooperates with the corresponding guide column to drive the transmission connecting rod to translate, and the transmission connecting rod cooperates with the long hole on the linkage swing arm through the corresponding guide column to drive the damper to rotate.

6. The transformer according to claim 2, 3 or 4, characterized in that: A plurality of air doors are provided, and the air doors are connected by transmission connecting rods.

7. The transformer according to claim 6, characterized in that: The transmission connecting rod is arranged on the side wall of the air guide channel, the air door is provided with a linkage swing arm, the linkage swing arm is provided with a long hole, and the transmission connecting rod is provided with a guide column extending into the corresponding long hole, so that the air doors can rotate synchronously through the linkage swing arms of the air doors and the transmission connecting rod.

8. The transformer according to any one of claims 1 to 4, characterized in that: The air guide channel has a turning section located between the same-direction air outlet and the reverse air outlet. A blocking door is provided at the turning section. The blocking door has a closed state in which the turning section is closed when the air door is opened, and an open state in which the turning section is opened when the air door is closed.

9. The transformer according to claim 8, characterized in that: The blocking door is connected to the corresponding damper, and the blocking door rotates when the damper rotates.

10. The transformer according to any one of claims 1 to 4, characterized in that: The shell is provided with a heat sink, and the reverse air outlet has a portion staggered from the shell.

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