A safety temperature control system for power distribution transformers

Abstract

This invention belongs to the field of transformer temperature control technology, specifically a safety temperature control system for distribution transformers. It includes a monitoring module, a temperature control module, an alarm module, and an intelligent controller. The monitoring sensors of the monitoring module are installed inside the transformer tank. The temperature control module includes a cooling plate installed on the side wall of the tank. Horizontal heat dissipation fins are evenly distributed on the outer surface of the cooling plate, with gaps between the fins forming heat dissipation gaps. This invention activates a cooling fan and a water mist supply device through the temperature control module, atomizing the cooling water into a cooling mist. This mist mixes with the flowing cooling airflow, forming a cooling airflow containing numerous small droplets. This cooling airflow is then delivered through a connecting port into the heat dissipation cavity inside the cooling plate, accelerating the airflow within the cavity and thus accelerating the transfer of heat from the tank's interior to the cavity. This achieves heat transfer while effectively controlling the temperature inside the tank.

Description

Technical Field

[0001] This invention belongs to the field of transformer temperature control technology, specifically a safety temperature control system for distribution transformers. Background Technology

[0002] Intelligent distribution transformers are a new type of power equipment that deeply integrates traditional distribution transformers with modern sensing, communication, and intelligent control technologies. They are one of the core devices in the distribution link of smart grids, and intelligent distribution transformers undertake the comprehensive functions of "power conversion, status perception, intelligent regulation, and collaborative interaction" in the distribution network.

[0003] As an important component of the existing power grid, intelligent distribution transformers play a vital role in regulating voltage and ensuring power supply. During this process, iron and copper losses in the windings and core of the transformer generate a large amount of heat, causing the internal temperature of the transformer to rise rapidly. Excessive temperature can increase the probability of damage to internal electronic components, and may even lead to local overheating, insulation breakdown, and power accidents, affecting the normal operation of the entire power grid. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a safety temperature control system for power distribution transformers.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention proposes a safety temperature control system for distribution transformers, including a monitoring module, a temperature control module, an alarm module and an intelligent controller, wherein the monitoring sensor of the monitoring module is installed inside the transformer tank;

[0006] The temperature control module includes a cooling plate installed on the side wall of the enclosure. The outer surface of the cooling plate is evenly provided with horizontal heat dissipation fins, and the gaps between the heat dissipation fins form heat dissipation gaps.

[0007] A heat dissipation cavity is provided on the side of the cooling plate near the box body. A connecting port is provided at the bottom of the heat dissipation cavity, which is connected to the cooling fan and water mist supply equipment. Heat dissipation grooves are evenly provided on the side wall of the heat dissipation cavity in the part pointing towards the heat dissipation gap.

[0008] Preferably, a top plate is horizontally arranged at the top of the heat sink, and a bottom plate is horizontally arranged at the bottom, with the top plate and bottom plate respectively sealing the top and bottom of the heat dissipation gap.

[0009] Preferably, the end of the heat sink extends through the heat sink groove into the heat sink cavity and is fixedly connected to the part of the side wall of the housing located inside the heat sink cavity;

[0010] The evenly distributed heat sinks divide the internal area of ​​the heat dissipation cavity into multiple heat dissipation zones. A connecting pipe extends laterally inside the heat dissipation cavity, which is connected to the connecting port. An air inlet is provided on the side wall of the connecting pipe at the location corresponding to the bottom of each heat dissipation zone.

[0011] Preferably, the heat dissipation zone is filled with heat-conducting heat dissipation particles, the end of the air inflator extends upward and passes through the gap between the heat dissipation particles to connect with the top of the heat dissipation zone, the side wall of the air inflator is evenly provided with air inflator holes, and the inner wall of the air inflator is provided with an annular filter screen.

[0012] Preferably, the heat dissipation particles have a bead-like structure and a smooth surface; the surface of the heat sink located inside the heat dissipation area is smooth, and the surface of the heat sink located in the heat dissipation gap is coated with protective paint.

[0013] Preferably, the top of the air inflator is connected to the output end of the rotating device located at the top of the heat dissipation area, and the bottom of the air inflator is rotatably connected to the side wall of the connecting pipe. Furthermore, multiple sets of agitating plates are arranged on the outer surface of the air inflator along the vertical direction.

[0014] Preferably, each set of stirring plates is arranged in a ring around the central axis of the inflation tube, and the ends of the stirring plates are bent around the same direction of rotation; the upper and lower sides of the stirring plate are provided with sealing plates, and the area surrounded by the stirring plate and the upper and lower sealing plates forms a contact area, which is connected to the inside of the inflation tube through impact holes.

[0015] Preferably, the contact area is covered by an elastic contact layer on the curved surface of the agitator, and the impact hole communicates with the interior of the contact layer.

[0016] Preferably, the contact layer is made of a sponge material with a loose and porous structure, and the end of the impact hole is connected to the air guide channel inside the contact layer.

[0017] Preferably, the contact layer is made of elastic filter cloth, and the edge of the contact layer is connected to the curved inner wall surface of the agitator, so that the area between the contact layer and the inner wall of the agitator forms an expansion cavity, and the impact hole communicates with the internal area of ​​the expansion cavity.

[0018] The beneficial effects of this invention are as follows:

[0019] The present invention discloses a safety temperature control system for a distribution transformer. A temperature control module activates a cooling fan and a water mist supply device to atomize cooling water into a mist, which then mixes with a flowing cooling airflow to form a cooling airflow containing numerous small droplets. This cooling airflow is then delivered through a connecting port into the heat dissipation cavity inside the cooling plate. After contacting the inner wall of the heat dissipation cavity, the cooling airflow flows out from the heat dissipation grooves on the side wall of the cavity, flowing outward along the gaps between the heat sink fins. During this process, the airflow inside the heat dissipation cavity is accelerated, thereby accelerating the transfer of heat from the internal environment of the transformer to the interior of the heat dissipation cavity, achieving heat transfer while effectively controlling the temperature inside the transformer. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a partial cross-sectional view of the present invention;

[0023] Figure 3 This is a schematic diagram of the cooling plate after the heat sink has been removed in this invention;

[0024] Figure 4 This is a schematic diagram of the internal heat dissipation cavity of the cooling plate in this invention;

[0025] Figure 5 This is a cross-sectional view of the stirring plate provided in Embodiment 5 of the present invention;

[0026] Figure 6 This is a cross-sectional view of the stirring plate provided in Embodiment Six of the present invention.

[0027] In the diagram: 1. Box body; 2. Cooling plate; 21. Heat sink; 211. Heat dissipation gap; 212. Top plate; 213. Bottom plate; 22. Heat dissipation cavity; 221. Connecting port; 222. Heat dissipation groove; 223. Heat dissipation area; 224. Connecting pipe; 23. Inflation pipe; 23. Inflation hole; 231. Stirring plate; 232. Sealing plate; 233. Contact area; 234. Impact hole; 235. Contact layer; 24. Air guide channel; 241. Expansion cavity; 242. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] As shown in the attached diagram of the instruction manual. Figures 1-4As shown, this application proposes a safety temperature control system for distribution transformers, comprising a monitoring module, a temperature control module, an alarm module, and an intelligent controller. The monitoring module includes various built-in sensors, such as temperature, oil level, insulation, vibration, and gas sensors, which are arranged on the transformer tank 1 to collect operating data in real time (such as winding temperature, gas content in oil, partial discharge, etc.) and summarize them in the power system intelligent management platform. Combined with algorithm analysis, the system can predict potential faults in advance (such as insulation aging, overheating, etc.). If the potential risk is too great, an alarm will be triggered in time. On the one hand, the temperature control module is activated to control the temperature of the working environment inside the transformer tank 1. On the other hand, the system notifies the inspection personnel to carry out maintenance and take corresponding measures to avoid the occurrence of electrical accidents.

[0031] The temperature control module includes a cooling plate 2 installed on the side wall of the housing 1. The outer surface of the cooling plate 2 is uniformly provided with horizontal heat dissipation fins 21. Both the cooling plate 2 and the heat dissipation fins 21 are made of metal with good thermal conductivity. The gap between the heat dissipation fins 21 forms a heat dissipation gap 211.

[0032] The cooling plate 2 has a recessed area on the surface near the box 1. The inner wall of the recessed area and the side wall of the box 1 opposite it form an enclosing area, which serves as a heat dissipation cavity 22. The bottom of the heat dissipation cavity 22 is provided with a connecting port 221, which is connected to the cooling fan and the water mist supply equipment. The water mist supply system includes a cooling water storage tank, an atomizer, and a water pump. By atomizing the cooling water into water mist and mixing it with the cooling airflow generated by the cooling fan, the system participates in the temperature control of the box 1, thereby improving the heat dissipation efficiency. The side wall of the heat dissipation cavity 22 is uniformly provided with heat dissipation grooves 222 at the part pointing towards the heat dissipation gap 211.

[0033] Specific workflow: As an important component of the existing smart power system, the smart distribution transformer plays a vital role in regulating voltage and ensuring power supply in the smart power network. During this process, the iron loss and copper loss that occur in the windings and core of the transformer during operation will generate a large amount of heat, causing the internal temperature of the transformer to rise rapidly. Excessive temperature can increase the probability of damage to internal electronic components, and may even cause local overheating, insulation breakdown, and power accidents, affecting the normal operation of the entire power network.

[0034] Therefore, this application includes a monitoring module that uses a temperature sensor located inside the enclosure 1 to monitor the temperature of the internal working environment in real time. Referring to existing oil-immersed transformers, the enclosure 1, which contains the transformer's power components, is filled with cooling oil, specifically a mineral oil for transformers. The cooling oil serves as a heat transfer medium, transferring heat generated by the windings, core, and other power components inside the transformer enclosure 1 to the side walls and cooling plates 2. Based on its excellent thermal conductivity, the heat is then directed to the outside environment through connected heat sinks 21, thus cooling the internal working environment of the enclosure 1. Both the side walls of the enclosure 1 and the heat sinks 21 can be made of materials with good thermal conductivity, which allows for better transfer of internally generated heat to the external environment, thereby achieving temperature control of the internal working environment of the enclosure 1.

[0035] When the external temperature is high and affects the cooling inside the enclosure 1, the cooling fan and water mist supply equipment can be activated through the temperature control module to atomize the cooling water into cooling water mist, which is then mixed with the flowing cooling airflow to form a cooling airflow containing a large number of small droplets. The cooling airflow is sent into the heat dissipation cavity 22 inside the cooling plate 2 through the connecting port 221. After the cooling airflow comes into contact with the inner wall of the heat dissipation cavity 22, it flows out from the heat dissipation groove 222 on the side wall of the heat dissipation cavity 22 and flows outward along the gap area of ​​the heat dissipation fins 21. In this process, the airflow inside the heat dissipation cavity 22 is accelerated, thereby accelerating the transfer of heat from the internal environment of the enclosure 1 to the heat dissipation cavity 22, realizing heat transfer while effectively controlling the temperature inside the enclosure 1.

[0036] Furthermore, as the cooling water mist enters the heat dissipation cavity 22 with the airflow, the humidity inside the heat dissipation cavity 22 increases. The increased airflow speed also accelerates the conversion of the moisture inside the heat dissipation cavity 22 into water vapor, which absorbs heat from the heat dissipation cavity 22 in the process, further accelerating the heat transfer inside the housing 1 and improving the cooling efficiency of the transformer power components.

[0037] As the cooling airflow flows from the heat dissipation slot 222 into the heat dissipation gap 211 between the outer heat dissipation fins 21, the cooling airflow accelerates the airflow in the heat dissipation gap 211, thereby improving the heat dissipation efficiency of the heat dissipation fins 21. On the other hand, the water mist remaining in the cooling airflow further absorbs the heat transferred from the surface of the heat dissipation fins 21 as it flows through the heat dissipation gap 211, cooling the heat dissipation fins 21 and accelerating the cooling of the transformer, ensuring the normal operation of the transformer under high load conditions. After the cooling operation, the atomizer can be turned off for a period of time to allow the dry cooling airflow to flush the inner wall of the heat dissipation cavity 22 and the heat dissipation gap 211, removing any residual moisture and keeping these parts dry during normal operation, thus reducing the impact of water vapor corrosion on the service life of these parts.

[0038] Compared with the prior art, the technical solution of this application uses cooling airflow mixed with water mist to participate in the cooling of the housing 1, and the cooling effect is significantly better than the air cooling treatment method using a cooling fan. In addition, compared with the water cooling method of the prior art, which requires a complex circulating cooling water flow structure with high sealing requirements and has higher requirements for the surrounding working environment, the technical solution of this application has a relatively simple and practical structure, which can be applied to outdoor working environments and support the normal operation of smart grid systems.

[0039] Example 2:

[0040] Based on Embodiment 1, a top plate 212 is horizontally arranged on the top of the heat sink 21, and a bottom plate 213 is horizontally arranged on the bottom. The top plate 212 and the bottom plate 213 seal the top and bottom of the heat dissipation gap 211, and the materials of the top plate 212 and the bottom plate 213 are the same as those of the heat sink 21, which further expands the heat dissipation surface of the housing 1.

[0041] The end of the heat sink 21 extends through the heat dissipation groove 222 into the heat dissipation cavity 22 and is fixed to the side wall of the housing 1, so that the internal area of ​​the heat dissipation cavity 22 is divided into multiple heat dissipation areas 223 by the heat sink 21. A connecting pipe 224 extends laterally inside the heat dissipation cavity 22. The connecting pipe 224 communicates with the connecting port 221. An air inlet pipe 23 is provided on the side wall of the connecting pipe 224 at the corresponding part of the bottom of each heat dissipation area 223. The air inlet pipe 23 communicates with the corresponding heat dissipation area 223.

[0042] Specific workflow: Based on the specific workflow in Embodiment 1, the top and bottom openings of the heat dissipation gap 211 are sealed by the top plate 212 and the bottom plate 213, so that the airflow flowing into the heat dissipation gap 211 is restricted in the heat dissipation gap 211 during the flow process and flows laterally along the heat dissipation gap 211. This causes the flow path of the cooling airflow that permeates outward to be unified and concentrated and coincides with the lateral extension direction of the heat dissipation gap 211. This can prolong the contact time between the cooling airflow and the side wall of the heat dissipation gap 211, so that the cooling effect of the cooling airflow on the heat sink 21 is concentrated and prolonged, improving the utilization efficiency of the cooling airflow and further improving the cooling efficiency of the transformer.

[0043] Furthermore, the heat sink 21 is designed to extend directly into the heat dissipation cavity 22 through the heat dissipation groove 222 and be directly fixed to the side wall of the casing 1 in the heat dissipation cavity 22; this allows the cooling airflow to permeate outward from the gap area between the heat dissipation groove 222 and the heat sink 21, increasing the contact surface between the cooling airflow and the heat sink 21; and the heat sink 21 distributes the internal area of ​​the heat dissipation cavity 22, so that when the cooling airflow flows into the heat dissipation cavity 22 along the connecting pipe 224, it will also be evenly distributed to each heat dissipation area 223 by the correspondingly provided air filling pipe 23. After the heat sink 21 comes into contact with the surface of the heat sink 21 and the side wall of the housing 1, it permeates out from the gap between the heat sink 222 and the heat sink 21. During this process, the heat sink 21 is fully affected by the cooling airflow and the cooling water mist therein, which accelerates the transfer of heat generated by the power components inside the housing 1 to the heat sink 21 and then to the outside, improving the cooling efficiency of the housing 1. In addition, the heat dissipation area 223 distributes the cooling airflow and cooling medium such as water mist, making the cooling effect on the side wall of the housing 1 more uniform and reducing the temperature difference that may occur in the housing 1 due to uneven heat dissipation.

[0044] Example 3:

[0045] Based on Embodiment 2, the heat dissipation zone 223 is filled with heat dissipation particles. The heat dissipation particles are made of a material with good thermal conductivity, have a spherical structure, and a smooth surface. The specific material can be a metal or non-metal with good thermal conductivity, such as hollow steel balls, aluminum nitride particles, or dry silica gel particles mixed with thermally conductive materials. Using lightweight materials can facilitate the flow of heat dissipation particles and improve heat conduction efficiency. The end of the air inlet tube 23 extends upward and passes through the gap between the heat dissipation particles to connect with the top of the heat dissipation zone 223. The side wall of the air inlet tube 23 is provided with an air inlet 231. The surface of the heat sink 21 located inside the heat dissipation zone 223 is smooth, and the surface of the heat sink 21 located in the heat dissipation gap 211 is coated with protective paint. An annular filter screen can be provided on the inner wall of the air inlet tube 23 to intercept external heat dissipation particles and prevent these heat dissipation particles from penetrating into the air inlet tube 23 through the air inlet 231 and other structures.

[0046] Specific workflow: Based on the specific workflow in Example 2, in order to more effectively transfer the heat generated inside the housing 1 to the outside, heat dissipation particles with good thermal conductivity are filled inside the heat dissipation area 223. In this way, the heat dissipation particles are filled into the area between the side wall of the housing 1 and the heat sink 21. This creates a dense heat transfer channel through the contacting heat dissipation particles, in addition to the direct connection between the heat sink 21 and the side wall of the housing 1. This allows the heat from the side wall of the housing 1 to be transferred to the heat sink 21 and the external environment through the contacting heat dissipation particles, effectively increasing the heat dissipation contact surface.

[0047] Furthermore, when the cooling airflow flows into the heat dissipation area 223 along the vertical inflation pipe 23, and then flows into the gaps between the heat dissipation particles through the evenly distributed inflation holes 231, the cooling airflow flows along the gaps between the heat dissipation particles and carries away the heat transferred from the housing 1. At the same time, because the accumulated heat dissipation particles form a loose and porous structure, the cooling water mist in the cooling airflow is intercepted in the gaps between the heat dissipation particles, increasing the contact time between the cooling water mist and the heat dissipation particles. Moreover, after the cooling water mist is dispersed into the gaps between the heat dissipation particles, it is heated more evenly, fully absorbing the transferred heat and fully absorbing the heat of the heat dissipation particles in the process of converting into water vapor, thereby achieving cooling of the interior of the heat dissipation area 223 and improving the heat dissipation efficiency of the housing 1.

[0048] Furthermore, the heat dissipation particles adopt a spherical structure, and the surface can also be coated with a hydrophilic material. When water mist comes into contact with the surface of the heat dissipation particles, the small droplets in the water mist are more likely to adhere to the smooth surface of the heat dissipation particles to form a liquid film. Subsequently, the heat dissipation particles fully absorb the heat of the heat dissipation particles, thereby cooling the heat dissipation particles. The temperature difference further promotes the adhesion of the small droplets in the water mist to the surface, while also accelerating the transfer of heat from inside the cabinet 1 to the heat dissipation particles, thus improving the heat dissipation efficiency. Moreover, the airflow impact in the heat dissipation zone 223 causes the heat dissipation particles inside the heat dissipation zone 223 to have a flow tendency. The smooth surface and spherical shape of the heat dissipation particles have less resistance to flow, and the wear caused by sliding when in contact with the heat sink 21 and the side wall surface of the cabinet 1 is also less. Therefore, the impact of the airflow improves the air cooling efficiency and accelerates the flow of the heat dissipation particles, allowing the heat dissipation particles near the cabinet 1 to exchange with the heat dissipation particles far away from the cabinet 1, thereby accelerating the heat transfer and improving the cooling efficiency of the electrical components inside the cabinet 1.

[0049] Example 4:

[0050] Based on Embodiment 3, the top of the inflation tube 23 is connected to the output end of the rotating device provided at the top of the heat dissipation area 223. The rotating device here can be a miniature motor device, and the rotating device is controlled by a controller. The bottom of the inflation tube 23 is rotatably connected to the side wall of the connecting tube 224, and a stirring plate 232 is provided on the outer surface of the inflation tube 23 at the part of the gap between the inflation hole 231.

[0051] The stirring plate 232 extends vertically, and the ends of the stirring plate 232 are curved around the same direction of rotation; the upper and lower sides of the stirring plate 232 are provided with sealing plates 233, and the area surrounded by the stirring plate 232 and the upper and lower sealing plates 233 forms a contact area 234; the contact area 234 is connected to the inside of the air tube 23 through the impact hole 235.

[0052] Specific workflow: Based on the specific workflow in Example 3, in order to accelerate the heat transfer of the housing 1, the air inlet pipe 23 and the connecting pipe 224 are rotatably connected, and the top of the air inlet pipe 23 is connected to the output end of the rotating device. During the cooling process, starting the rotating device drives the air inlet pipe 23 to rotate in the middle position inside the heat dissipation zone 223. This allows the cooling airflow from the air inlet hole 231 on the air inlet pipe 23 to spread more evenly and expand its effective range under centrifugal force. Simultaneously, the air inlet pipe 23 drives the agitator plate 232 on the side wall to rotate. The rotating agitator plate 232, while rotating, also drives the heat dissipation particles inside the heat dissipation zone 223. The horizontal flow between the heat dissipation particles in the heat dissipation zone 223, which are close to and far from the housing 1, facilitates sufficient exchange between the heat dissipation particles. This allows the heat dissipation particles that are close to the housing 1 and have absorbed a significant amount of heat to be transferred to the areas far from the housing 1. Under the action of the flowing cooling airflow and water mist, these particles are rapidly cooled, transferring heat to the cooling airflow and the resulting water vapor, which is then carried away to the outside. In this way, the cooling airflow, cooling water mist, and heat dissipation particles, which are the cooling media, form a solid-liquid-gas heat conduction system, accelerate the heat transfer of the housing 1, and further improve the cooling efficiency of the power components.

[0053] Furthermore, the curved agitator 232, in conjunction with the upper and lower closed plates 233, forms a semi-enclosed contact area 234. Heat dissipation particles near the housing 1 enter the contact area 234 and, after being enclosed and restricted, move as the air pipe 23 rotates. The cooling fan and rotating equipment are intermittently started and stopped. When the rotating equipment stops, the heat dissipation particles inside the contact area 234 are propelled away by inertia and the impact of the cooling airflow from the impact hole 235. In this way, heat dissipation particles from different locations are transferred horizontally to various parts using the contact area 234 inside the agitator 232 as a carrier, preventing localized area transfer. When the temperature is too high, the flow and exchange of heat dissipation particles between different areas inside the heat dissipation zone 223 is accelerated, which speeds up the heat transfer of the housing 1 and improves the heat dissipation efficiency of the housing 1. Furthermore, the heat dissipation particles entering the contact area 234 come into contact with the contact layer 24 in the semi-enclosed area and are washed by the cooling airflow containing water mist flowing out of the impact hole 235, so that they are cooled separately and fully combined with water mist in the contact area 234 to achieve cooling. Subsequently, under the action of agitation, they are mixed into the heat dissipation particles inside the heat dissipation zone 223. This process is continued to fully improve the degree of combination between the cooling airflow and water mist and the heat dissipation particles, further improving the heat dissipation efficiency.

[0054] Furthermore, considering that the technical solution of this application uses large transformers with a large number of heat dissipation particles inside, the agitator 232 at the bottom may have difficulty rotating due to the accumulation and mutual compression of the heat dissipation particles. Therefore, on the one hand, lightweight heat dissipation particles are selected. On the other hand, continuous partitions can be set inside the heat dissipation area 223 between the heat dissipation fins 21 on both sides. The partitions are made of the same material as the heat dissipation fins 21 and are rotatably connected to the air inlet pipe 23. While expanding the heat dissipation area, the partitions are located between the vertically distributed agitator 232, dividing the heat dissipation area 223 into vertically distributed different partitions. The heat dissipation particles are evenly filled into each partition, while the agitator 232 only agitates the heat dissipation particles in a single partition. This results in less resistance and ensures sufficient agitation of the heat dissipation particles in the partition.

[0055] Example 5:

[0056] Based on Embodiment 4, as shown in the accompanying drawings of the specification. Figure 5 As shown, there are various possible technical solutions for the specific structure of the contact layer 24. Any solution that can evenly distribute the incoming water mist and cooling airflow into the gaps between the incoming heat dissipation particles can be applied to this application. This embodiment provides a possible technical solution in which the contact layer 24 is made of a sponge material with a loose and porous structure, and the end of the impact hole 235 is connected to the air guide channel 241 inside the contact layer 24.

[0057] Specific workflow: Based on the specific workflow in Example 4, the incoming cooling airflow flows along the air guide channel 241 into the loose pores inside the contact layer 24, causing the contact layer 24 to be wetted. As the agitator plate 232 rotates, the heat dissipation particles enter the contact area 234 and come into contact with the surface of the contact layer 24. The sponge-structured and wetted contact layer 24, during the contact with the surface of the heat dissipation particles, evenly spreads the absorbed cooling water onto the surface of the heat dissipation particles, so that the atomized cooling water is in full contact with the heat dissipation particles. Subsequently, due to the inertia of the rotation stopping, the heat dissipation particles flow out, and the heat dissipation particles in other parts enter and repeat the above process. In this way, the cooling water mist formed is evenly spread onto the surface of the heat dissipation particles and fully participates in the cooling operation of the housing 1, improving the utilization efficiency of the cooling water mist.

[0058] Example 6:

[0059] Based on Embodiment 4, as shown in the accompanying drawings of the specification. Figure 6As shown, unlike Embodiment 5, the contact layer 24 structure in this embodiment adopts a different technical solution. The contact layer 24 is made of elastic filter cloth material, and the edge of the contact layer 24 is connected to the curved inner wall surface of the stirring plate 232, so that the area between the contact layer 24 and the inner wall of the stirring plate 232 forms an expansion cavity 242, and the impact hole 235 communicates with the internal area of ​​the expansion cavity 242.

[0060] Specific workflow: Based on the specific workflow in Example 4, the cooling fan and rotating equipment are controlled to start alternately. Specifically, when the rotating equipment starts, the cooling fan remains off. At this time, the forward-rotating agitator 232 agitates the heat dissipation particles, causing some of the heat dissipation particles to enter the contact area 234 and maintain contact with the contact layer 24 inside the contact area 234. At this time, the contact layer 24 is compressed and deformed, and the space of the expansion cavity 242 decreases. When the cooling fan starts and fills the expansion cavity 242 with cooling airflow, the rotating equipment stops rotating forward. At the same time, the cooling airflow fills the expansion cavity 242, increasing the space of the expansion cavity 242 and compressing the heat dissipation particles inside the contact area 234. The cooling airflow and water mist also penetrate into the gaps between the mutually compressed heat dissipation particles along the filter holes on the contact layer 24 and mix with each other.

[0061] After the rotating equipment stops for a period of time, it rotates in the opposite direction. The centrifugal force, combined with the compression of the expanding contact layer 24, causes some of the heat dissipation particles mixed with cooling water mist to flow out and enter the heat dissipation zone 223, where they mix with the heat dissipation particles. After the rotating equipment rotates in the opposite direction for a period of time, it stops again, the cooling fan is turned off, and it rotates in the forward direction again. The heat dissipation particles that have re-entered the contact zone 234 compress the contact layer 24 again, allowing the residual cooling airflow and water mist inside the expansion chamber 242 to fully penetrate out while reducing the volume of the expansion chamber 242. The aforementioned period of time can be set to 5-8 seconds, which can be set according to actual needs. The start and stop of the rotating equipment and the cooling fan are controlled by the corresponding intelligent controller through a pre-edited command table.

[0062] Repeat the above process to fully mix the cooling airflow and water mist into the heat dissipation particles, and to promote the transfer of heat dissipation particles by means of the stirring plate 232 and the contact area 234, so that the heat dissipation particles inside the heat dissipation area 223 are fully mixed with each other, avoiding uneven heat distribution and excessive temperature difference that would affect the temperature control of the box 1.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety temperature control system for a distribution transformer, comprising a monitoring module, a temperature control module, an alarm module, and an intelligent controller, wherein the monitoring sensor of the monitoring module is installed inside the transformer housing (1); characterized in that: The temperature control module includes a cooling plate (2) set on the side wall of the box (1). The outer surface of the cooling plate (2) is uniformly provided with horizontal heat sinks (21), and the gap area between the heat sinks (21) forms a heat dissipation gap (211). A heat dissipation cavity (22) is provided on the side of the cooling plate (2) close to the box (1). A connecting port (221) is provided at the bottom of the heat dissipation cavity (22). The connecting port (221) is connected to the cooling fan and the water mist supply equipment. Heat dissipation grooves (222) are uniformly provided on the side wall of the heat dissipation cavity (22) in the part pointing to the heat dissipation gap (211). The end of the heat sink (21) extends through the heat sink groove (222) into the heat sink cavity (22) and is fixed to the part of the side wall of the box (1) located inside the heat sink cavity (22); the evenly distributed heat sink (21) divides the internal area of ​​the heat sink cavity (22) into multiple heat sink areas (223). A connecting pipe (224) extends laterally inside the heat sink cavity (22). The connecting pipe (224) is connected to the connecting port (221), and an air inlet pipe (23) is provided on the side wall of the connecting pipe (224) at the part corresponding to the bottom of each heat sink area (223). The heat dissipation zone (223) is filled with heat-conducting heat dissipation particles. The end of the air inflator (23) extends upward and passes through the gap between the heat dissipation particles to connect with the top of the heat dissipation zone (223). Air inflator holes (231) are evenly arranged on the side wall of the air inflator (23). An annular filter screen is arranged on the inner wall of the air inflator (23). The heat dissipation particles are spherical and have a smooth surface; the part of the heat sink (21) located inside the heat dissipation area (223) has a smooth surface, and the part of the heat sink (21) located in the heat dissipation gap (211) is coated with protective paint. The top of the air inflator (23) is connected to the output end of the rotating device set at the top of the heat dissipation area (223), and the bottom of the air inflator (23) is rotatably connected to the side wall of the connecting pipe (224). Furthermore, multiple sets of stirring plates (232) are set on the outer surface of the air inflator (23) along the vertical direction. Each set of stirring plates (232) is arranged in a ring around the central axis of the air tube (23), and the ends of the stirring plates (232) are bent around the same direction of rotation. The upper and lower sides of the stirring plates (232) are provided with sealing plates (233), and the area surrounded by the stirring plates (232) and the upper and lower sealing plates (233) forms a contact area (234). The contact area (234) is connected to the inside of the air tube (23) through the impact hole (235). The inside of the contact area (234) is covered with an elastic contact layer (24) on the bent surface of the stirring plate (232), and the impact hole (235) is connected to the inside of the contact layer (24).

2. The safety temperature control system for a distribution transformer according to claim 1, characterized in that: The heat sink (21) has a top plate (212) horizontally arranged on the top and a bottom plate (213) horizontally arranged on the bottom. The top plate (212) and the bottom plate (213) respectively seal the top and bottom of the heat dissipation gap (211).

3. The safety temperature control system for a distribution transformer according to claim 1, characterized in that: The contact layer (24) is made of a loose, porous sponge material, and the end of the impact hole (235) is connected to the air guide channel (241) inside the contact layer (24).

4. The safety temperature control system for a distribution transformer according to claim 1, characterized in that: The contact layer (24) is made of elastic filter cloth, and the edge of the contact layer (24) is connected to the curved inner wall surface of the stirring plate (232), so that the area between the contact layer (24) and the inner wall of the stirring plate (232) forms an expansion cavity (242), and the impact hole (235) is connected to the internal area of ​​the expansion cavity (242).

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