Charging pile filtering treatment device

Abstract

The invention relates to the technical field of harmonic treatment of charging equipment, and discloses a charging pile filtering treatment device which comprises a filtering treatment device body, the bottom of the filtering treatment device body extends downwards to form a mounting cavity, a water cooling machine is arranged in the mounting cavity, and a cooling pipe of the water cooling machine extends into the filtering treatment device body. After being coiled in the water cooling pipe, the water cooling pipe penetrates out and flows back to the water cooling machine; the filtering treatment device comprises a filtering treatment device body, the outer wall of the filtering treatment device body is provided with a plurality of heat dissipation pipes communicated with the interior of the filtering treatment device body, and an outlet of each heat dissipation pipe is formed in the top of one end located in the filtering treatment device body and is perpendicular to an inlet formed in the corresponding heat dissipation pipe; the device can adapt to an outdoor installation environment, the probability that rainwater permeates into the device is avoided, efficient heat dissipation can be achieved, and the application reliability and effectiveness of the device in a new energy automobile charging pile scene are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of harmonic mitigation technology for charging equipment, and more particularly to a filtering and mitigation device for charging piles. Background Technology

[0002] With the rapid development of the new energy vehicle industry, AC charging piles and DC charging piles have become core infrastructure for electric vehicle charging, widely used in outdoor parking lots, roadsides, and other open-air scenarios. However, during operation, the nonlinear operating characteristics of the internal power electronic conversion devices (such as rectifier bridges and inverters) of these two types of charging piles inevitably generate a large amount of harmonic voltage and harmonic current. When these harmonic components are injected into the power distribution network, they will cause multi-dimensional negative impacts: Firstly, harmonics distort the sinusoidal waveform of the power grid, leading to a significant decrease in power transmission efficiency. This not only increases the active power loss of transmission lines but also causes additional heating in power distribution equipment such as transformers and circuit breakers, accelerating insulation aging and shortening equipment lifespan. Secondly, harmonic pollution interferes with the metering accuracy of precision power metering instruments, triggering malfunctions of relay protection devices. In severe cases, it can even cause serious faults such as power distribution equipment tripping or burning out, resulting not only in direct economic losses but also affecting the normal power supply to surrounding residents and industrial and commercial users, significantly reducing power supply reliability. To address the aforementioned harmonic pollution problem, harmonic mitigation devices have emerged. These devices suppress harmonic components in the power distribution network through filtering, compensation, and other technical means, effectively reducing harmonic hazards and the frequency of power outages. While saving on equipment repair costs and reducing manpower, they significantly improve power supply stability and power quality, providing crucial protection for the safe operation of charging facilities for new energy vehicles. However, existing harmonic mitigation devices still have significant technical shortcomings in practical applications, hindering their long-term stable operation: Because core components such as power modules, inductors, and capacitors generate a large amount of heat during harmonic mitigation, if this heat cannot be dissipated in time, the internal temperature will rise, affecting component performance and even causing thermal failure. Therefore, heat dissipation design has become a critical technical aspect of harmonic mitigation devices.

[0003] In existing technologies, harmonic mitigation devices mostly adopt open-ventilation heat dissipation structures. Although this method is simple in structure, it is fundamentally contradictory to the outdoor open-air installation scenario of charging piles: under severe weather conditions such as rain and snow, rainwater and snow water can easily be blown in by the wind and seep into the device through the heat dissipation holes, causing corrosion and short circuits to the internal electrical components, which seriously affects the working stability and service life of the harmonic mitigation device. In extreme cases, it can lead to direct damage to the device, loss of harmonic mitigation function, and thus expose the power distribution network to the risk of harmonic pollution again. In addition, ventilation alone has limited heat dissipation efficiency, especially in the high-temperature environment of summer. The outdoor ambient temperature is already high, and the temperature difference for ventilation and heat exchange is insufficient, making it difficult to quickly dissipate the heat inside the device. This causes the internal temperature to continue to rise, which not only reduces the accuracy and efficiency of harmonic control, but may also trigger the device's protection shutdown due to overheating, further affecting the normal charging service of the charging pile. Therefore, there is an urgent need for a charging pile filtering and treatment device that combines leak prevention and efficient heat dissipation. Summary of the Invention

[0004] The purpose of this invention is to provide a charging pile filtering and treatment device that can adapt to outdoor open-air installation environments, reduce the probability of rainwater seeping into the device, and achieve efficient heat dissipation, ensuring the reliability and effectiveness of the device in new energy vehicle charging pile scenarios.

[0005] The invention adopts the following technical solution: A charging pile filtering and treatment device includes a filtering and treatment device body. The bottom of the filtering and treatment device body extends downward to form an installation cavity. A water chiller is installed in the installation cavity. The cooling pipe of the water chiller extends into the filtering and treatment device body, coils inside it, and then exits back to the water chiller. A heat dissipation pipe is provided on the outer wall of the filtering and treatment device body and communicates with its interior. Multiple heat dissipation pipes are provided, and the outlet of each heat dissipation pipe is located at the top of one end inside the filtering and treatment device body and is arranged perpendicularly to the inlet provided on the heat dissipation pipe.

[0006] Preferably, a heat dissipation mesh is provided on the side wall of the mounting cavity.

[0007] Preferably, an inspection door is provided at the front end of the mounting cavity.

[0008] Preferably, the heat dissipation pipe extends upward at one end inside the filter treatment device body, and the outlet at the top of the device is higher than the inlet on the outside of the heat dissipation pipe.

[0009] Preferably, the heat dissipation pipe inlet is opened at an angle upward from the bottom of the heat dissipation pipe.

[0010] Preferably, the heat dissipation pipes are arranged in rows on the filter treatment device body, and each heat dissipation pipe in each row is connected to a main pipe through a branch pipe. Multiple main pipes are connected to the cooling pipes located inside the filter treatment device body. Each heat dissipation pipe in each row is provided with a drain pipe at the bottom outside the filter treatment device body. Multiple drain pipes in each row are connected to a water collection pipe, and the water collection pipe is connected to the cooling pipes connected to the water chiller.

[0011] Preferably, each heat dissipation pipe is provided with a sealing ring at one end outside the drain pipe, and a sealing float is elastically provided on the sealing ring. In the initial state, the sealing float does not contact the through hole in the middle of the sealing ring, so as to ensure the normal passage of airflow.

[0012] Preferably, a cleaning ring is connected to the outside of the sealing float, and cleaning bristles are arranged along the circumference of the cleaning ring, with the cleaning bristles contacting the inner wall of the heat dissipation tube.

[0013] Preferably, a filter section is provided on the cooling pipe through which the water collection pipe is connected.

[0014] Preferably, the filtration section divides the cooling pipe into upper and lower parts, wherein the filtration section includes a filter cover rotatably mounted on the upper cooling pipe, a support base plate rotatably mounted at the bottom of the filter cover, the lower cooling pipe being fixedly connected to the support base plate, a filter cylinder being mounted on the support base plate, the filter cylinder covering the filter hole through which the support base plate communicates with the cooling pipe; a drain hole is provided on the support base plate on one side of the filter hole, a sludge collection pipe is connected to the drain hole, a sealing plate is provided inside the filter cover to seal the drain hole; a cleaning brush for cleaning the filter cylinder and the support base plate is also provided on the filter cover.

[0015] Compared with existing technologies, the advantages of this invention are as follows: By arranging the cooling pipes of the water chiller coiled within the filter treatment device, the heat exchange area with the internal heat-generating components is increased. Utilizing the highly efficient thermal conductivity of the coolant, heat generated by core components such as power modules, inductors, and capacitors can be quickly dissipated. Even in high-temperature environments during summer, the internal temperature remains stable, solving the problems of insufficient temperature difference and low heat dissipation efficiency associated with simple ventilation. Furthermore, the device body does not require ventilation holes; gas exchange between the interior and the outside is achieved solely through the heat dissipation pipes on the outer wall. The outlet of the heat dissipation pipes is located at the top of one end of the body, with the inlet and outlet arranged perpendicularly. This structure effectively prevents rainwater and snowmelt from seeping in, fundamentally eliminating the risk of moisture corroding electrical components and causing short circuits, making it perfectly suited for outdoor charging pile installation environments.

[0016] In addition, the present invention ensures continuous and efficient heat dissipation of the internal heat through the coordinated heat dissipation design of the water cooling system and heat dissipation pipes, avoiding problems such as component performance degradation and harmonic control accuracy reduction caused by high temperature. At the same time, it prevents the device from shutting down due to overheating, ensuring the continuity of charging pile power replenishment services. Furthermore, the leak-proof structure completely isolates the internal electrical components from water corrosion, reduces the probability of component failure, significantly extends the service life of the filter treatment device, and reduces the manpower and material costs of equipment replacement and emergency repair. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the heat dissipation pipe and the main pipe of the present invention; Figure 3 This is a cross-sectional view of the heat dissipation pipe of the present invention; Figure 4 for Figure 3 Enlarged view of A in the middle; Figure 5 This is a cross-sectional view of the filter section of the present invention. Detailed Implementation

[0018] The invention will now be described clearly and completely with reference to the accompanying drawings and embodiments: like Figures 1 to 5 As shown, the charging pile filtering and treatment device of the invention includes a filtering and treatment device body 1. The bottom of the filtering and treatment device body 1 extends downward to form an installation cavity. A heat dissipation mesh cover 2 is provided on the side wall of the installation cavity. A maintenance door 3 is provided at the front end of the installation cavity. A water chiller is provided in the installation cavity. The cooling pipe 4 of the water chiller extends into the filtering and treatment device body 1, coils inside it, and then exits to return to the water chiller. The cooling pipe 4 of the water chiller is coiled inside the filtering and treatment device body 1, which increases the heat exchange area with the internal heat-generating elements. By utilizing the efficient thermal conductivity of the coolant, the heat generated by the core components such as the power module, inductor, and capacitor can be quickly dissipated. Even in the high temperature environment of summer, the internal temperature can still be kept stable, solving the problems of insufficient temperature difference and low heat dissipation efficiency of simple ventilation heat dissipation.

[0019] The outer wall of the filter treatment device body 1 is equipped with heat dissipation pipes 5 that communicate with its interior. Multiple heat dissipation pipes 5 are installed, with the inlet of each pipe 5 opening upwards at an angle from its bottom. The outlet of each heat dissipation pipe 5 is located at the top of one end inside the filter treatment device body 1, perpendicular to the inlet. This arrangement of heat dissipation pipes 5 ensures normal ventilation and heat dissipation of the device, eliminating the need for a constant water chiller. Furthermore, by placing the outlet of the heat dissipation pipe 5 at the top of one end inside the body and arranging the inlet and outlet perpendicularly, this structure effectively prevents rainwater and snowmelt from seeping in, fundamentally eliminating the risk of moisture corroding electrical components and causing short circuits, making it perfectly suited for outdoor charging pile installation environments.

[0020] Furthermore, in this invention, the heat dissipation pipe 5 extends upward at one end inside the filter treatment device body 1, and the outlet at the top of the device is higher than the inlet outside the heat dissipation pipe 5. By increasing the height difference between the outlet and the inlet, a natural "liquid resistance barrier" can be constructed using gravity. Even in extreme weather conditions such as heavy rain and strong winds, if a small amount of rainwater accidentally enters the inlet outside the heat dissipation pipe 5, the rainwater will have difficulty climbing back up to the inner outlet under the pull of gravity because the outlet is significantly higher than the inlet, and it will be unable to seep into the device body. Compared with a structure that is only arranged vertically, this further reduces the probability of rainwater entering and seeping out from the outlet, and greatly improves the device's ability to withstand risks in harsh outdoor environments.

[0021] Furthermore, heat dissipation pipes 5 are arranged in rows on the filter treatment device body 1. Each heat dissipation pipe 5 in each row is connected to a main pipe 7 via a branch pipe 6. The outlet of the branch pipe 6 is located above the inlet of the heat dissipation pipe 5. Multiple main pipes 7 are connected to cooling pipes 4 located inside the filter treatment device body 1. In this invention, using... Figure 2 For example, the heat dissipation pipes 5 are arranged in two rows, upper and lower. The main pipes 7 of each row are connected to each other through connecting pipes 8. The middle of the connecting pipes 8 is connected to the cooling pipes 4. Each heat dissipation pipe 5 in each row is provided with a drain pipe 9 at the bottom outside the filter treatment device body 1. The multiple drain pipes 9 in each row are connected to the water collection pipe 10. The water collection pipe 10 is connected to the cooling pipes 4 connected to the water chiller. During operation, as the coolant circulates in the cooling pipes 4, the inside of the heat dissipation pipes 5 can be cleaned before the coolant flows back into the water chiller. The dust accumulated at the corners of the heat dissipation pipes 5 is cleaned and flushed out, avoiding blockage of the heat dissipation pipes 5 and the resulting decrease in ventilation and heat dissipation effect. In addition, inside the heat pipe 5, at the point where the split pipe 6 connects to the heat pipe 5, a baffle 11 is elastically hinged by a torsion spring. In the initial state, the baffle 11 blocks the through hole between the split pipe 6 and the heat pipe 5. When the coolant circulates, the coolant will push the baffle 11 open, and the movable end of the bottom of the baffle 11 will abut against the inner wall of the heat pipe 5. At this time, the baffle 11 is arranged at an angle, which can block the upper space of the heat pipe 5 and prevent the coolant from flowing upward.

[0022] Each heat pipe 5 has a sealing ring 12 coaxially installed at one end outside the drain pipe 9. A sealing float 13 is elastically installed on the sealing ring 12. In the initial state, the sealing float 13 does not contact the through hole in the middle of the sealing ring 12, ensuring the normal passage of airflow and realizing heat dissipation. During operation, as the coolant enters the heat pipe 5, it will impact the sealing float 13, causing it to move towards the inlet of the heat pipe 5 and block the through hole in the middle of the sealing ring 12, preventing the coolant from flowing out from the inlet of the heat pipe 5. Preferably, a cleaning ring 15 is connected to the outside of the sealing float 13 via a connecting rod 14. The connecting rod 14 is centrally located in the middle of the cleaning ring 15 and is fixedly connected to the inner wall of the cleaning ring 15 via spaced-apart fixing rods 16. The cleaning ring 15 is located outside the sealing ring 12 and is connected to the sealing ring 12 via a spring 17. A guide rod 18 is provided on the cleaning ring 15. The guide rod 18 is movably inserted into the spring 17 and into the guide hole 19 on the sealing ring 12. Cleaning bristles 20 are provided along the circumference of the cleaning ring 15. The cleaning bristles 20 contact the inner wall of the heat sink 5. As the coolant pushes the sealing float 13 toward the inlet of the heat sink 5, it cleans the inner wall near the inlet of the heat sink 5 and removes the dust accumulated near the inlet of the heat sink 5 in a timely manner.

[0023] Furthermore, in this invention, a filter section is provided on the cooling pipe 4 connected to the water collection pipe 10 to filter the coolant flowing out of the heat dissipation pipe 5, preventing dust flushed out of the heat dissipation pipe 5 from entering the water chiller. Specifically, the filter section divides the cooling pipe 4 into upper and lower parts, wherein the filter section includes a filter cover 21, which is rotatably mounted on the upper cooling pipe 4 via a sealed bearing. A support base plate 22 is rotatably mounted on the bottom of the filter cover 21 via a sealed bearing. The lower cooling pipe 4 is fixedly connected to the support base plate 22. A filter cylinder 23 is provided on the support base plate 22, covering the filter holes through which the support base plate 22 and the cooling pipe 4 communicate. The filter cylinder 23 has an overall cylindrical structure with a convex arc-shaped top, which ensures the filtration area while reducing the accumulation of solid dirt on its top. A drain hole 26 is provided on the supporting base plate 22 on one side of the filter hole. The drain hole 26 is connected to a collection pipe 24, which is equipped with a screw-on and detachable end cap. The collection pipe 24 is preferably inclined relative to the axis of the cooling pipe 4 to facilitate the smooth entry of dirt. A sealing plate 25 is provided inside the filter cover 21 to seal the drain hole 26. A cleaning brush 27 for cleaning the filter cylinder 23 and the supporting base plate 22 is also provided on the filter cover 21. The cleaning brush 27 is located on the opposite side of the sealing plate 25 and has an L-shaped structure, contacting the filter cylinder 23 and the supporting base plate 22 respectively. By rotating the filter cover 21, the cleaning brush 27 can be driven to clean the side wall of the filter cylinder 23, preventing solid dirt from accumulating and adhering to its outer wall and affecting the filtration effect. At the same time, the cleaning brush 27 will push the fallen dirt towards the collection pipe 24, thereby smoothly pushing the dirt into the collection pipe 24 for centralized discharge. In this invention, a micro motor connected to a power source can also be fixedly installed on the cooling pipe 4 at the upper part of the filter cover 21. A driving gear is installed on the motor shaft, and a driven gear ring is coaxially sleeved on the outside of the filter cover 21. The driving gear meshes with the driven gear ring, and automatic cleaning can be achieved by periodically turning on the micro motor. The cleaning work can be carried out after each coolant circulation.

[0024] This invention, by installing the water chiller within the mounting cavity formed by extending from the bottom of the main body, features a compact, coiled layout of cooling pipes 4 that does not occupy excessive internal space. Furthermore, multiple heat dissipation pipes 5 are arranged with vertical inlets and outlets. This ensures both effective heat dissipation and leak-proof performance while maintaining a simple structure that is easy to process and assemble. It effectively reduces additional heat generation and insulation aging in power distribution equipment, lowers the risk of relay protection device malfunctions and equipment tripping or burning out, reduces economic losses, ensures normal power supply for surrounding residents and industrial and commercial users, and further improves the reliability and power quality of the power distribution network.

Claims

1. A charging pile filtering and treatment device, comprising a filtering and treatment device body, characterized in that: The bottom of the filter treatment device body extends downward to form an installation cavity, in which a water chiller is installed. The cooling pipe of the water chiller extends into the filter treatment device body, coils inside, and then exits back to the water chiller. A heat dissipation pipe communicating with the interior is provided on the outer wall of the filter treatment device body. Multiple heat dissipation pipes are provided, and the outlet of each heat dissipation pipe is located at the top of one end inside the filter treatment device body, arranged perpendicularly to the inlet provided on the heat dissipation pipe.

2. The charging pile filtering and treatment device according to claim 1, characterized in that: A heat dissipation mesh is provided on the side wall of the mounting cavity.

3. The charging pile filtering and treatment device according to claim 1, characterized in that: An inspection door is provided at the front end of the mounting cavity.

4. The charging pile filtering and treatment device according to claim 1, characterized in that: The heat dissipation pipe extends upward from one end inside the filter treatment device body, and the outlet at the top of the device is higher than the inlet on the outside of the heat dissipation pipe.

5. The charging pile filtering and treatment device according to claim 4, characterized in that: The heat dissipation pipe inlet is opened at an angle upward from the bottom of the heat dissipation pipe.

6. The charging pile filtering and treatment device according to any one of claims 1-5, characterized in that: The heat dissipation pipes are arranged in rows on the filter treatment device body. Each heat dissipation pipe in each row is connected to a main pipe through a branch pipe. Multiple main pipes are connected to the cooling pipes located inside the filter treatment device body. Each heat dissipation pipe in each row is provided with a drain pipe at the bottom outside the filter treatment device body. Multiple drain pipes in each row are connected to a water collection pipe. The water collection pipe is connected to the cooling pipes connected to the water chiller.

7. The charging pile filtering and treatment device according to claim 6, characterized in that: Each heat dissipation pipe has a sealing ring at one end located outside the drain pipe. A sealing float is elastically provided on the sealing ring. In the initial state, the sealing float does not contact the through hole in the middle of the sealing ring, ensuring the normal passage of airflow.

8. The charging pile filtering and treatment device according to claim 7, characterized in that: The outer side of the sealing float is connected to a cleaning ring, and cleaning bristles are arranged along its circumference on the cleaning ring, with the cleaning bristles contacting the inner wall of the heat dissipation tube.

9. The charging pile filtering and treatment device according to claim 6, characterized in that: A filter section is provided on the cooling pipe through which the water collection pipe is connected.

10. The charging pile filtering and treatment device according to claim 9, characterized in that: The filter section divides the cooling pipe into upper and lower parts. The filter section includes a filter cover rotatably mounted on the upper cooling pipe, a support base plate rotatably mounted at the bottom of the filter cover, and the lower cooling pipe fixedly connected to the support base plate. A filter cylinder is mounted on the support base plate, and the filter cylinder covers the filter hole through which the support base plate communicates with the cooling pipe. A drain hole is provided on the support base plate on one side of the filter hole, and a sludge collection pipe is connected to the drain hole. A sealing plate is provided inside the filter cover to seal the drain hole. A cleaning brush is also provided on the filter cover for cleaning the filter cylinder and the support base plate.

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