Auxiliary heat dissipation system for box-type transformer and power distribution station

Abstract

This utility model relates to the field of power engineering technology, and in particular to an auxiliary heat dissipation system for a box-type transformer and a substation. The transformer heat dissipation system includes a heat exchanger, an exhaust device, a return air duct, a liquid storage tank, a liquid transfer pump, and a return pipe. The heat exchanger includes a heat exchange tube and an outer cover fixedly installed outside the heat exchange tube. A liquid flow cavity is formed between the inner wall of the outer cover and the outer wall of the heat exchange tube. One end of the exhaust device is connected to the top space of the transformer housing, and the other end is connected to the heat exchange tube. One end of the return air duct is connected to the end of the heat exchange tube away from the exhaust device, and the other end is connected to the bottom space of the transformer housing. The liquid storage tank is located outside the transformer. The inlet end of the liquid transfer pump is connected to the liquid storage tank, and the outlet end of the liquid transfer pump is connected to the liquid flow cavity. One end of the return pipe is connected to the liquid flow cavity, and the other end of the return pipe is connected to the liquid storage tank. As a supplementary cooling method to the transformer housing's own air-cooling device, it can accelerate the extraction of hot air from the transformer housing and introduce cold air into the housing.

Description

Technical Field

[0001] This utility model relates to the field of power engineering technology, and in particular to an auxiliary heat dissipation system for a box-type transformer and a substation. Background Technology

[0002] Prefabricated transformers integrate high-voltage power distribution, transformer step-down, and low-voltage power distribution functions within a closed enclosure. Besides the transformer, the enclosure also requires complete high-voltage and low-voltage power distribution equipment, as well as auxiliary protection and control devices. Reliable heat dissipation is crucial for prefabricated transformers during operation. Existing prefabricated transformers often use an exhaust fan at the top of the enclosure to draw air out, creating negative pressure inside and encouraging outside air to enter for cooling. However, when the transformer is operating under high load and the ambient temperature is high, both the outside and inside air temperatures remain high. Furthermore, relying on the negative pressure from the exhaust fan to maintain airflow is insufficient to quickly and adequately dissipate heat, making it difficult to effectively reduce the transformer temperature and extend the equipment's lifespan. Utility Model Content

[0003] The technical problem addressed in this application is that existing box-type transformers, which use negative pressure generated by a fan inside the box to exchange heat between the air inside and outside the box to dissipate heat from the transformer inside the box, are difficult to meet the heat dissipation requirements when the transformer is operating under high load and the ambient temperature is high.

[0004] In order to solve the above-mentioned technical problems, the purpose of this application is to provide an auxiliary heat dissipation system for a box-type transformer, including a heat exchanger, an exhaust device, a return air duct, a liquid storage tank, a liquid delivery pump and a return liquid duct;

[0005] The heat exchanger includes an outer cover and a heat exchange tube. The outer cover is fixedly installed on the outside of the heat exchange tube, and a liquid flow cavity is formed between the inner wall of the outer cover and the outer wall of the heat exchange tube.

[0006] The air inlet of the exhaust device is used to connect to the top space of the box-type transformer room, and the air outlet of the exhaust device is connected to the heat exchange pipe.

[0007] One end of the return air duct is connected to the end of the heat exchange tube away from the exhaust device, and the other end of the return air duct is connected to the bottom space of the container room.

[0008] The liquid storage tank is located outside the transformer and is used to store coolant.

[0009] The inlet end of the infusion pump is connected to the storage tank, and the outlet end of the infusion pump is connected to the liquid flow chamber.

[0010] One end of the return pipe is connected to the liquid flow chamber, and the other end of the return pipe is connected to the liquid storage tank.

[0011] As a preferred embodiment, the exhaust device includes an exhaust pipe and a first fan. The air inlet of the first fan is connected to one end of the exhaust pipe, the air outlet of the first fan is connected to the end of the heat exchange pipe away from the return air pipe, and the end of the exhaust pipe away from the first fan is connected to the top space of the container.

[0012] As a preferred embodiment, the auxiliary heat dissipation system for the box-type transformer further includes a first temperature sensor and a controller. The first temperature sensor is located in the top space of the box-type transformer room, and the first fan, the infusion pump, and the first temperature sensor are all electrically connected to the controller.

[0013] As a preferred embodiment, the auxiliary heat dissipation system for the box-type transformer further includes a second temperature sensor, which is connected to the return air duct, and the detection end of the second temperature sensor is in communication with the cavity of the return air duct.

[0014] The second temperature sensor is electrically connected to the controller.

[0015] As a preferred embodiment, the exhaust duct includes a main exhaust duct and multiple branch exhaust ducts. One end of the main exhaust duct is connected to the air inlet of the first fan, and the other end of the main exhaust duct is connected to the multiple branch exhaust ducts. The ends of each branch exhaust duct away from the main exhaust duct are spaced apart in the top space of the container.

[0016] As a preferred embodiment, the return air duct includes a main return air duct and multiple branch return air ducts. One end of the main return air duct is connected to the end of the heat exchange tube away from the exhaust device, and the other end of the main return air duct is connected to each of the branch return air ducts. The ends of each branch return air duct away from the main return air duct are spaced apart in the bottom space of the container.

[0017] As a preferred embodiment, the auxiliary heat dissipation system for the box-type transformer further includes a sunshade, which is arranged above the liquid storage tank.

[0018] A power distribution station includes the aforementioned auxiliary cooling system for a box-type transformer and a box-type transformer.

[0019] As a preferred embodiment, the box-type transformer further includes a housing, a transformer, and a support frame. The housing has a storage space, and both the support frame and the transformer are disposed in the storage space, with the transformer disposed on the support frame.

[0020] As a preferred embodiment, the bottom of the container is provided with an air inlet, and the top of the container is connected to a second fan. The air inlet of the second fan is connected to the top space of the container, and the air outlet of the second fan is connected to the outside.

[0021] Compared with the prior art, the beneficial effects of this application are as follows:

[0022] The auxiliary cooling system for a box-type transformer disclosed in this application includes a heat exchanger, an exhaust fan, a return air duct, a liquid storage tank, a liquid pump, and a return pipe. The heat exchanger includes an outer casing and heat exchange tubes. The outer casing is fixedly mounted on the outside of the heat exchange tubes, and a liquid flow chamber is formed between the inner wall of the outer casing and the outer wall of the heat exchange tubes. One end of the exhaust fan is connected to the top space of the transformer housing, and the other end is connected to the heat exchange tubes. One end of the return air duct is connected to the end of the heat exchange tubes away from the exhaust fan, and the other end is connected to the bottom space of the transformer housing. The liquid storage tank is located outside the transformer and is used to store coolant. The inlet end of the liquid pump is connected to the liquid storage tank, and the outlet end of the liquid pump is connected to the liquid flow chamber. One end of the return pipe is connected to the liquid flow chamber, and the other end is connected to the liquid storage tank. The exhaust fan draws hot air from the top of the transformer housing into the heat exchange tubes, accelerating the outflow of hot air from the transformer housing, and the liquid pump pump directs the hot air into the liquid flow chamber. Coolant is introduced and cools the hot air inside the heat exchange tubes. The cooled air then flows through the return pipe to the bottom of the enclosure and gradually moves towards the top, thus cooling the transformer. The coolant, after heat exchange with the heat exchange tubes, flows back to the storage tank through the return pipe. This transformer cooling system accelerates the extraction of hot air from the top of the enclosure, preventing heat from accumulating inside for extended periods. Furthermore, the introduction of cooled air to the bottom of the enclosure increases the upward airflow speed, resulting in faster air exchange and improved heat exchange. This cooling system can be used on newly designed transformers or added to existing transformers as a supplementary cooling method to the transformer's own air-cooling system, activated when the transformer's own air-cooling system cannot meet the operating temperature requirements. Attached Figure Description

[0023] Figure 1 This is a first structural schematic diagram of the auxiliary heat dissipation system for the box-type transformer of this application;

[0024] Figure 2 This is a second structural schematic diagram of the auxiliary heat dissipation system for the box-type transformer of this application;

[0025] Figure 3 This is a schematic diagram of the heat exchanger structure;

[0026] Figure 4 This is a schematic diagram of the connection structure between the heat exchanger and the exhaust fan shaft.

[0027] Figure 5 This is a schematic diagram showing the installation method of the transformer inside the enclosure;

[0028] In the diagram, 100 is the container house, 200 is the transformer, 300 is the support frame, 11 is the heat exchanger, 111 is the outer casing, 112 is the heat exchange tube, 113 is the liquid flow chamber, 12 is the exhaust device, 121 is the exhaust pipe, 1211 is the exhaust main pipe, 1212 is the exhaust branch pipe, 122 is the first fan, 13 is the return air pipe, 131 is the return main pipe, 132 is the return branch pipe, 21 is the liquid storage tank, 22 is the infusion pump, 23 is the return liquid pipe, and 3 is the sunshade. Detailed Implementation

[0029] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this application.

[0030] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms; these terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0031] like Figures 1 to 4As shown, a preferred embodiment of the auxiliary cooling system for a box-type transformer of this application is used to dissipate heat from a box-type transformer. The box-type transformer includes a housing 100 for accommodating the transformer 200. The auxiliary cooling system for the box-type transformer includes a heat exchanger 11, an exhaust fan 12, a return air duct 13, a liquid storage tank 21, a liquid pump 22, and a return liquid pipe 23. The heat exchanger 11 includes an outer cover 111 and a heat exchange tube 112. The outer cover 111 is fixedly installed on the outside of the heat exchange tube 112, and a liquid flow cavity 113 is formed between the inner wall of the outer cover 111 and the outer wall of the heat exchange tube 112. The heat exchanger 11 is made of copper, aluminum, or stainless steel, which have good thermal conductivity. The equipment is made of metal materials. The air inlet of the exhaust device 12 is used to connect to the top space of the container 100, and the air outlet of the exhaust device 12 is connected to the heat exchange pipe 112. The exhaust device 12 can draw hot air from the top of the container 100 into the heat exchange pipe 112, accelerating the outflow of hot air from the container 100. The liquid storage tank 21 is located outside the transformer 200 and is used to store coolant. The liquid inlet of the infusion pump 22 is connected to the liquid storage tank 21, and the liquid outlet of the infusion pump 22 is connected to the liquid flow chamber 113. One end of the return pipe 23 is connected to the liquid flow chamber 113, and the other end of the return pipe 23 is connected to the liquid flow chamber 113. The liquid storage tank 21 is connected, and the outer cover 111 has a liquid inlet and a liquid outlet, which are respectively arranged on both sides of the outer cover 111 along its length. Both the liquid inlet and the liquid outlet are connected to the liquid flow chamber 113. The liquid outlet end of the liquid pump 22 is connected to the edge of the liquid inlet, and the return pipe 23 is connected to the edge of the liquid outlet. The liquid pump 22 can continuously spray coolant into the liquid flow chamber 113. The coolant flows in the liquid flow chamber 113 and washes the tube wall of the heat exchange tube 112, thereby cooling the hot gas in the heat exchange tube 112. The coolant washes the heat exchange tube 112, which ensures that the outer wall of the heat exchange tube 112 is always submerged in the coolant at a lower temperature, thus ensuring the cooling effect. Coolant flowing out of the liquid flow chamber 113 returns to the storage tank 21 through the return pipe 23; one end of the return air pipe 13 is connected to the end of the heat exchange pipe 112 away from the exhaust device 12, and the other end of the return air pipe 13 is connected to the bottom space of the enclosure 100; while the exhaust device 12 draws the hot air from the top of the enclosure 100 into the heat exchange pipe 112, a negative pressure is formed in the top space of the enclosure 100, creating a chimney effect inside the enclosure 100. The cooled gas flowing out of the heat exchange pipe 112 enters the bottom space of the enclosure 100 through the return air pipe 13, and under the action of the chimney effect, the cooled gas gradually flows upward from the bottom of the enclosure 100. The auxiliary heat dissipation system for the box-type transformer of this application can be used on newly designed box-type transformers or added to existing box-type transformers as a supplementary cooling method to the box-type transformer's own air-cooling device, and is activated when the box-type transformer's own air-cooling system cannot meet the operating temperature requirements of the box-type transformer.

[0032] In this embodiment, the coolant is water. Water has a high specific heat capacity, and its temperature at room temperature is lower than the ambient temperature. In this embodiment, the water in the outdoor storage tank 21 serves as the cold source for the heat exchanger 11. Compared to using the heat exchanger 11 as an air cooler and passing the hot air from the chamber 100 into the air cooler to cool the gas inside the chamber 100, the water temperature in the storage tank 21 is lower than the air temperature, and the heat exchange effect between water and the heat exchange tube 112 is better than that between air and the heat exchange tube 112. Therefore, this embodiment provides better cooling for the gas inside the chamber 100 than air cooling. In other embodiments of this application, the coolant can be other liquids with a high specific heat capacity.

[0033] In this embodiment, the exhaust device 12 includes an exhaust pipe 121 and a first fan 122. The air inlet of the first fan 122 is connected to one end of the exhaust pipe 121, and the air outlet of the first fan 122 is connected to the end of the heat exchange pipe 112 away from the return air pipe 13. The end of the exhaust pipe 121 away from the first fan 122 is connected to the top space of the container room 100.

[0034] The exhaust duct 121 includes a main exhaust duct 1211 and multiple exhaust branch ducts 1212. One end of the main exhaust duct 1211 is connected to the air inlet of the first fan 122, and the other end of the main exhaust duct 1211 is connected to the multiple exhaust branch ducts 1212. The ends of each exhaust branch duct 1212 away from the main exhaust duct 1211 are arranged at intervals in the top space of the container 100. The dispersed exhaust branch ducts 1212 further improve the extraction effect of the exhaust device 12 on the hot air at the top of the container 100.

[0035] In this embodiment, the auxiliary cooling system for the box-type transformer further includes a first temperature sensor and a controller. The first temperature sensor is located in the top space of the box chamber 100. The first fan 122, the first temperature sensor, and the infusion pump 22 are all electrically connected to the controller. Specifically, the auxiliary cooling system for the box-type transformer in this embodiment is activated when the air-cooled cooling structure of the box chamber 100 itself cannot meet the cooling requirements. The first temperature sensor can monitor the gas temperature in the top space of the box chamber 100. When the detected value of the first temperature sensor exceeds a set threshold, the first temperature sensor sends an electrical signal to the controller, and the controller sends electrical signals to the first fan 122 and the infusion pump 22, causing the fan and the infusion pump 22 to start, thereby using the auxiliary cooling system for the box-type transformer in this embodiment to cool the gas inside the box chamber 100.

[0036] Furthermore, the auxiliary cooling system for the box-type transformer also includes a second temperature sensor, which is connected to the return air duct 13, and the detection end of the second temperature sensor is in communication with the cavity of the return air duct 13; the controller is electrically connected to the second temperature sensor. Through the second temperature sensor, the temperature of the return gas cooled by the heat exchange tube 112 can be determined, thereby determining whether the temperature of the cooled return gas meets the requirements. When the return gas temperature is lower than the requirements, the power of the infusion pump 22 can be increased to improve the cooling effect.

[0037] In this embodiment, the auxiliary heat dissipation system for the box-type transformer also includes a sunshade 3, which is arranged above the liquid storage tank 21. This prevents the temperature of the liquid storage tank 21 from rising due to sunlight exposure.

[0038] It should be noted that the auxiliary heat dissipation system for the box-type transformer in this application is mainly suitable for southern regions where the winter temperature is above 0°C, to avoid the liquid storage tank 21 or heat exchange tube 112 freezing and cracking due to excessively low ambient temperature.

[0039] In this embodiment, the return air duct 13 includes a main return air duct 131 and multiple return air branch ducts 132. One end of the main return air duct 131 is connected to the end of the heat exchange tube 112 away from the exhaust device 12, and the other end of the main return air duct 131 is connected to each of the return air branch ducts 132. The ends of each return air branch duct 132 away from the main return air duct 131 are spaced apart in the bottom space of the container room 100. The arrangement of multiple return air branch ducts 132 increases the number of return air points and improves the return air effect.

[0040] This application also provides a power distribution station, including the above-mentioned auxiliary heat dissipation system for the box-type transformer and the box-type transformer.

[0041] Among them, such as Figure 5 As shown, the box-type transformer also includes a housing 100, a transformer 200, and a support frame 300. The housing 100 has a receiving space, and both the support frame 300 and the transformer 200 are disposed within the receiving space, with the transformer 200 mounted on the support frame 300. The support frame 300 provides ventilation space between the transformer 200 and the floor of the housing 100.

[0042] In this embodiment, the bottom of the container 100 is provided with an air inlet, and the top of the container 100 is connected to a second fan. The air inlet of the second fan is connected to the top space of the container 100, and the air outlet of the second fan is connected to the outside. Specifically, there are two second fans. When the temperature inside the container reaches 35°C, one second fan is turned on inside the container 100 for air cooling. When the temperature inside the container reaches 40°C or above, both second fans are turned on. If the temperature inside the container 100 still cannot be reduced after the two second fans have been turned on for 1 hour, it indicates that the outside air temperature is too high, and the temperature of the air flowing into the container is close to the outlet temperature of the container. Natural wind cannot effectively cool the inside of the container. At this time, the first fan 122 of the infusion pump 22 is turned on. After the temperature inside the container 100 drops to 40°C, the first fan 122 and the infusion pump 22 are turned off after a delay of 10 minutes. If the temperature inside the container 100 then drops to 35°C, both second fans are turned off after a delay of 10 minutes.

[0043] The volume of the water tank can be determined based on the heat output of the transformer 200, the specific heat capacity of the water, the difference between the water temperature and the room temperature, and the activation time of the auxiliary cooling system for the box-type transformer of this application, so that the total heat output of the transformer 200 during the activation time is equal to the total heat absorbed by the water. It should be noted that the auxiliary cooling system for the box-type transformer of this application is mainly activated when the transformer 200 overheats, assisting the box-type transformer's own air-cooling system in cooling the transformer 200. There is no need to set up an additional cooling device to cool the water in the water tank. The auxiliary cooling system for the box-type transformer of this application utilizes the characteristics of water's large specific heat capacity and good thermal conductivity to achieve auxiliary emergency cooling of the transformer 200, and the overall cost is low.

[0044] In summary, the auxiliary cooling system for the box-type transformer of this application includes a heat exchanger 11, an exhaust fan 12, a return air duct 13, a liquid storage tank 21, a liquid transfer pump 22, and a return liquid pipe 23. The heat exchanger 11 includes an outer casing 111 and a heat exchange tube 112. The outer casing 111 is fixedly installed on the outside of the heat exchange tube 112, and a liquid flow cavity 113 is formed between the inner wall of the outer casing 111 and the outer wall of the heat exchange tube 112. One end of the exhaust fan 12 is connected to the top space of the box-type transformer 100. The other end of 12 is connected to heat exchange tube 112; one end of return air duct 13 is connected to the end of heat exchange tube 112 away from exhaust device 12, and the other end of return air duct 13 is connected to the bottom space of box 100; liquid storage tank 21 is installed outside transformer 200, and liquid storage tank 21 is used to store coolant; the inlet end of liquid pump 22 is connected to liquid storage tank 21, and the outlet end of liquid pump 22 is connected to liquid flow chamber 113; one end of return pipe 23 is connected to liquid flow chamber 113, and the other end of return pipe 23 is connected to the bottom space of box 100; The end is connected to the liquid storage tank 21. The exhaust device 12 can draw hot air from the top of the enclosure 100 into the heat exchange tube 112, accelerating the outflow of hot air from the enclosure 100. Coolant is introduced into the liquid flow chamber 113 through the liquid pump 22. The coolant cools the hot air in the heat exchange tube 112 through the heat exchange tube 112. After cooling, the gas is introduced into the bottom of the enclosure 100 through the return pipe and gradually flows to the top of the enclosure 100, thereby cooling the box-type transformer. The coolant after heat exchange with the heat exchange tube 112 flows back to the liquid storage tank 21 through the return pipe 23. The box-type transformer heat dissipation system of this application can accelerate the extraction of hot air from the enclosure 100 and introduce cooled air into the enclosure 100. The cooling effect is good. It can be used on newly designed box-type transformers and can also be installed on existing box-type transformers as a supplementary cooling method to the box-type transformer's own air cooling device. It can be turned on when the box-type transformer's own air cooling system cannot meet the operating temperature requirements of the box-type transformer.

[0045] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. An auxiliary heat dissipation system for a box-type transformer, characterized in that, It includes a heat exchanger (11), an exhaust fan (12), a return air duct (13), a liquid storage tank (21), a liquid pump (22), and a return pipe (23); The heat exchanger (11) includes an outer cover (111) and a heat exchange tube (112). The outer cover (111) is fixedly covered on the outside of the heat exchange tube (112). A liquid flow cavity (113) is formed between the inner wall of the outer cover (111) and the outer wall of the heat exchange tube (112). The air inlet of the exhaust device (12) is used to connect to the top space of the box-type transformer box room (100), and the air outlet of the exhaust device (12) is connected to the heat exchange pipe (112). One end of the return air duct (13) is connected to the end of the heat exchange tube (112) away from the exhaust device (12), and the other end of the return air duct (13) is connected to the bottom space of the container room (100); The liquid storage tank (21) is located outside the transformer (200), and the liquid storage tank (21) is used to store coolant; The inlet end of the infusion pump (22) is connected to the storage tank (21), and the outlet end of the infusion pump (22) is connected to the liquid flow chamber (113). One end of the return pipe (23) is connected to the liquid flow chamber (113), and the other end of the return pipe (23) is connected to the liquid storage tank (21).

2. The auxiliary heat dissipation system for a box-type transformer according to claim 1, characterized in that, The exhaust device (12) includes an exhaust pipe (121) and a first fan (122). The air inlet of the first fan (122) is connected to one end of the exhaust pipe (121), and the air outlet of the first fan (122) is connected to the end of the heat exchange pipe (112) away from the return air pipe (13). The end of the exhaust pipe (121) away from the first fan (122) is connected to the top space of the container room (100).

3. The auxiliary heat dissipation system for a box-type transformer according to claim 2, characterized in that, The auxiliary heat dissipation system for the box-type transformer also includes a first temperature sensor and a controller. The first temperature sensor is located in the top space of the box (100). The first fan (122), the infusion pump (22) and the first temperature sensor are all electrically connected to the controller.

4. The auxiliary heat dissipation system for a box-type transformer according to claim 3, characterized in that, The auxiliary heat dissipation system for the box-type transformer also includes a second temperature sensor, which is connected to the return air duct (13), and the detection end of the second temperature sensor is connected to the cavity of the return air duct (13). The second temperature sensor is electrically connected to the controller.

5. The auxiliary heat dissipation system for a box-type transformer according to claim 2, characterized in that, The exhaust duct (121) includes an exhaust main duct (1211) and a plurality of exhaust branch ducts (1212). One end of the exhaust main duct (1211) is connected to the air inlet of the first fan (122), and the other end of the exhaust main duct (1211) is connected to the plurality of exhaust branch ducts (1212). The ends of each exhaust branch duct (1212) away from the exhaust main duct (1211) are spaced apart in the top space of the container room (100).

6. The auxiliary heat dissipation system for a box-type transformer according to claim 1, characterized in that, The return air duct (13) includes a return air main duct (131) and a plurality of return air branch ducts (132). One end of the return air main duct (131) is connected to the end of the heat exchange tube (112) away from the exhaust device (12). The other end of the return air main duct (131) is connected to each of the return air branch ducts (132). The ends of each of the return air branch ducts (132) away from the return air main duct (131) are spaced apart in the bottom space of the container room (100).

7. The auxiliary heat dissipation system for a box-type transformer according to claim 1, characterized in that, The auxiliary heat dissipation system for the box-type transformer also includes a sunshade (3), which is arranged above the liquid storage tank (21).

8. A power distribution station, characterized in that, Includes the auxiliary heat dissipation system for the box-type transformer and the box-type transformer as described in any one of claims 1 to 7.

9. The substation according to claim 8, characterized in that, The box-type transformer also includes a box housing (100), a transformer (200), and a support frame (300). The box housing (100) has a accommodating space. The support frame (300) and the transformer (200) are both arranged in the accommodating space, and the transformer (200) is arranged on the support frame (300).

10. The substation according to claim 9, characterized in that, The bottom of the container (100) is provided with an air inlet, and the top of the container (100) is connected to a second fan. The air inlet of the second fan is connected to the top space of the container (100), and the air outlet of the second fan is connected to the outside.

Images