New energy automobile charging pile high-low voltage power distribution cabinet and ventilation control method thereof

Abstract

The invention discloses a new energy automobile charging pile high-low voltage power distribution cabinet and a ventilation control method thereof. The new energy automobile charging pile high-low voltage power distribution cabinet comprises a cabinet body and electrical elements installed in the cabinet body. A left air chamber and a right air chamber are respectively mounted on the left side and the right side of the cabinet body; the left air chamber and the right air chamber are the same in structure, and the internal structure of the left air chamber and the internal structure of the right air chamber are symmetrically distributed on the two sides of the cabinet body. Each of the left air chamber and the right air chamber comprises a shell, a fan partition plate, a drying filter plate and a water curtain; a ventilation opening opposite to the cabinet body is formed in the side wall of the shell, the fan partition plate, the drying filter plate and the water curtain are sequentially and transversely installed in the shell from inside to outside, and a water storage pool right opposite to the water curtain is arranged below the shell. Air is evaporated and cooled through the water curtain and then is subjected to humidity reduction through the drying filter plate, so that the humidity of the air entering the cabinet body does not exceed a set humidity value, the problem that moisture affects electrical elements is solved, and water and electricity are mutually independent.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging pile distribution cabinets, and specifically relates to a new energy vehicle charging pile high and low voltage distribution cabinet and a ventilation control method thereof. Background Art

[0002] The number of new energy vehicles is increasing year by year, driving increasing demands on the number and scale of charging piles. Fast-charging and ultra-fast-charging electric vehicles, in particular, require high-power charging piles. For example, an 800V ultra-fast-charging electric vehicle can charge from 10% to 80% in as little as 12 minutes, requiring a charging pile output of 500kW. This increased charging pile output power also places higher demands on the high- and low-voltage distribution cabinets in charging stations. This increased power also increases heat generation, raising the need for heat dissipation.

[0003] Existing high and low voltage distribution cabinets for new energy vehicle charging stations use two cooling methods: air cooling and air conditioning. Air cooling uses a fan to introduce fresh air into the cabinet, removing the large amounts of heat generated by the distribution equipment. Air cooling offers low energy consumption and low costs, making it suitable for areas with low annual average temperatures. However, this also draws dust from the air into the cabinet, resulting in a low dust protection level. This is particularly true in dusty areas, requiring regular dust cleaning and resulting in high labor costs. Air conditioning, on the other hand, involves installing an outdoor air conditioner on the side of the distribution cabinet. The internal air conditioner generates energy to balance the heat generated by the distribution equipment. This method is suitable for use in higher temperature areas. While air conditioning cooling has the disadvantage of high energy consumption, it allows for a sealed cabinet, high dust protection, and reduces labor cleaning costs.

[0004] From the above two heat dissipation methods, it can be seen that while meeting the heat dissipation requirements of the power distribution equipment inside the cabinet, it is impossible to simultaneously require the heat dissipation system to have lower energy consumption and higher dustproof level.

[0005] Of course, in the field of heat dissipation, in addition to the two heat dissipation methods mentioned above, there are many other heat dissipation methods, such as heat dissipation by water evaporation. This heat dissipation method can achieve a good cooling effect after being applied to the cooling tower. The central air-conditioning system of large buildings adopts this heat dissipation method. If this heat dissipation method can be applied to the charging pile distribution cabinet, energy consumption and dust prevention issues can be taken into account. The patent with application number 202411552390.3 discloses a photovoltaic power generation distribution cabinet, which adopts a filter plate structure of a polyester fiber layer sandwiched between a water-absorbing cotton layer. The water-absorbing cotton layer can be dried after absorbing water to restore the drying capacity. The principle of dust prevention and dehumidification is to use two sets of fans and two sets of filter plates, and to achieve the reuse of the filter plates by reversing the fan. However, this structure has the following problems: 1. The heat dissipation method of the above-mentioned photovoltaic power distribution cabinet is essentially still air cooling. A water-absorbing layer that can repeatedly absorb water is added to the existing filter structure. In an environment with high air humidity, it can indeed obtain dry air and intercept dust. However, its cooling effect depends on the ambient temperature. In the hot season with dry air, the cooling effect is no different from the conventional air cooling method. Therefore, air cooling and water evaporation heat dissipation are not combined.

[0006] 2. The polyester fiber layer serves as the primary barrier to dust. As dust accumulates, its ventilation becomes less effective. Back-flushing can indeed remove most of the dust. However, existing charging stations are mostly open-air and located near roads. Oil particles and other inorganic particles in vehicle exhaust can easily adhere to the polyester fiber layer. Long-term back-flushing to clean the polyester fiber layer is ineffective and requires regular manual cleaning, presenting the same challenges as conventional dust-proof structures.

[0007] In addition, the patent with application number 202021383183.7 discloses a mobile cooling device for a power distribution room, which uses a water pipe and a water curtain to cool the interior of the power distribution room by using the water flowing in the water pipe. At the same time, the water flows into the water curtain and the water vapor is sucked into the interior of the power distribution room through the air intake fan for cooling. At the same time, the desiccant in the drying box is used to dry the air sucked into the power distribution room by the air intake fan. This cooling device does use a water evaporation heat dissipation structure to reduce the temperature of the power distribution room, but it has problems in that: oil particles and other inorganic particles in the air are attached to the water curtain with the air, which pollutes the water curtain on the one hand, and on the other hand, dust is mixed into the water and enters the water tank with the water flow. Due to the flow velocity retardation effect of the boundary layer on the inner surface of the water tank, some dust in the water will adhere to the inner surface of the water tank and pollute the water tank. It does not solve the problem of how to clean the dust attached to the water curtain and the water tank. In addition, if only one of the water curtain and the water tank is cleaned, the remaining dust will continue to contaminate the water curtain and the water tank with the water circulation, and the cleaning effect will be reduced.

[0008] In summary, the common technical difficulty of existing water evaporation cooling distribution cabinets is how to simultaneously clean the dust attached to the water curtain and the water tank during long-term operation, keep clean circulating water flowing through the water curtain, and not rely on manual cleaning. Summary of the Invention

[0009] In view of the deficiencies in the prior art, the present invention provides a high and low voltage distribution cabinet for a new energy vehicle charging pile, comprising a cabinet body and electrical components installed in the cabinet body; a left air chamber and a right air chamber are respectively installed on the left and right sides of the cabinet body, and the left air chamber and the right air chamber are respectively communicated with the inner cavity of the cabinet body; the left air chamber and the right air chamber have the same structure and the internal structure of the left air chamber and the internal structure of the right air chamber are symmetrically distributed on both sides of the cabinet body; the left air chamber and the right air chamber both comprise a shell, a fan baffle, a drying filter plate and a water curtain; a side wall of the shell is provided with a vent opposite to the cabinet body, and the fan baffle, the drying filter plate and the water curtain are sequentially installed horizontally in the shell body from the inside to the outside, and a water reservoir is provided below the shell body opposite to the water curtain, and the water in the reservoir A first water pump is provided for pumping water to the upper end of the water curtain; the desiccant of the drying filter plate is reusable, and an electric heating wire is provided in the drying filter plate; the water curtain includes a curtain frame, an elastically deformable shaping curtain, a cleaning roller and a driving mechanism; the shaping curtain is provided with multiple strips, all of which are wavy, and the upper and lower ends of each shaping curtain are fixedly connected to the upper and lower edges of the curtain frame respectively, and all shaping curtains are distributed laterally at equal intervals; at least two cleaning rollers are provided between each two adjacent shaping curtains, and the driving mechanism is connected to the corresponding housing, and the driving mechanism is in transmission connection with all the cleaning rollers, and the cleaning rollers are driven by the driving mechanism to rotate and move back and forth up and down, thereby causing the cleaning rollers to remove dirt attached to the shaping curtains.

[0010] The preferred embodiment of the high and low voltage distribution cabinet for the new energy vehicle charging pile in the present invention is as follows: the drive mechanism includes a telescopic motor and a synchronous frame, the telescopic motor is longitudinally fixed to the upper end of the corresponding housing, and the upper end of the telescopic shaft of the telescopic motor is fixedly connected to the synchronous frame; each cleaning roller is provided with a coaxially fixed gear at both ends, and the left and right sides of each gear are respectively meshed with a vertical fixed rack and a vertical movable rack, and the upper ends of all movable racks pass through the top wall of the corresponding housing and are then fixedly connected to the synchronous frame. The telescopic motor drives all movable racks to move up and down, thereby causing all cleaning rollers to rotate and move up and down synchronously. Each movable rack is staggered with the adjacent fixed rack, and the lower ends of all movable racks on the same side of the shaped curtain are fixedly connected by a crossbar, and the crossbar is staggered with the fixed rack; the central axis of each gear is sleeved with a spacer, and the fixed rack and movable rack on the left and right sides of the gear respectively pass through the spacer, and the spacer and the fixed rack, as well as the spacer and the movable rack, are connected by ball rolling. The upper ends of all the movable racks on each side of the shaped curtain are fixedly connected by a synchronous frame to form a whole, and the lower ends are fixed by a crossbar to form a whole. All the movable racks on each side are integrated, and each one is not loose. The telescopic motor drives all the movable racks to rise and fall synchronously, so that the gears are always in a meshing state, maintaining an effective transmission relationship. The function of the spacer is as follows: First, each end of each cleaning roller is kept in a meshing state with the corresponding fixed rack and movable rack through the spacer. Second, the gap between the spacer and the movable rack or fixed rack is extremely small, and a rolling connection relationship is formed by balls. The spacer can keep the corresponding cleaning roller in a horizontal state at all times, avoiding the problem of one end of the cleaning roller being higher than the other, and keeping the gear from being misaligned with the movable rack or fixed rack.

[0011] The preferred embodiment of the high- and low-voltage distribution cabinet for new energy vehicle charging stations in this invention is as follows: Each housing is provided with two rows of longitudinally distributed nozzles located between the corresponding drying filter plate and the water curtain, with all nozzle outlets facing the water curtain. Each water reservoir is equipped with a second water pump connected to the corresponding two rows of nozzles. This second water pump is a high-pressure pump that pressurizes water and sprays it out of the nozzles to rinse dirt attached to the surface of the water curtain, thereby maintaining the cleanliness of the circulating water.

[0012] A preferred embodiment of the high- and low-voltage distribution cabinet for new energy vehicle charging piles in the present invention comprises: a fan partition equipped with at least two fans, each capable of both forward and reverse rotation, with all fans distributed longitudinally along the fan partition. Each vent is equipped with a waterproof filter. Each fan partition is equipped with three fans spaced evenly apart longitudinally. The six fans rotate simultaneously in both forward and reverse directions, generating air convection that compensates for wind resistance created by the waterproof filter, water curtain, and drying filter plate, rapidly dissipating heat generated by electrical components.

[0013] The preferred embodiment of the high- and low-voltage distribution cabinet for new energy vehicle charging piles in this invention features a slideway provided on the front or rear sidewall of each housing. Each filter dryer is laterally inserted into the housing along the corresponding slideway, thereby enabling a detachable connection between the filter dryer and the housing. The desiccant filling the filter dryer has a limited lifespan. Upon expiration of its useful life, the filter dryer can be removed, the desiccant replaced, and then inserted into the slideway. This makes replacement simple and reduces maintenance.

[0014] The preferred embodiment of the high- and low-voltage distribution cabinet for a new energy vehicle charging station of the present invention is as follows: the cabinet is equipped with a controller and temperature and humidity sensors, each water reservoir is equipped with a liquid level sensor and a turbidity meter, and the bottom wall of the water reservoir is equipped with a valved drain pipe and a valved water supply pipe. The input end of the controller is electrically connected to the temperature and humidity sensors, all turbidity meters, and all liquid level sensors, and the output end of the controller is electrically connected to all fans, all first water pumps, all electric heating wires, all second water pumps, and the solenoid valves of the valved drain pipe and the solenoid valves of the valved water supply pipe. The controller can automatically change the wind direction according to the humidity value of the drying filter plate, automatically replenish water according to the liquid level sensor, and automatically clean pollutants according to the turbidity meter, eliminating the need for manual processing and achieving a high degree of intelligence.

[0015] The beneficial effects of the high and low voltage distribution cabinet for new energy vehicle charging piles in the present invention are: 1. The total power of the fan and water pump is much lower than that of the existing air-conditioning compressor. The heat dissipation method using water evaporation consumes less energy and has a better cooling effect than simple air cooling.

[0016] 2. The dust in the air is intercepted by the water curtain and mixed into the water. Compared with air cooling, the amount of dust entering the cabinet is less and the dustproof level is higher.

[0017] 3. Dust is intercepted by the water curtain and adheres to the surface of the shaped fabric. The drive mechanism starts and stops periodically to clean both sides of the shaped fabric. The specific cleaning method is as follows: the shaped fabric is curved, and the drive mechanism drives the cleaning roller to reciprocate along a longitudinal straight line. The cleaning roller squeezes the shaped fabric, causing elastic deformation. The friction between the shaped fabric and the cleaning roller increases, and the cleaning roller's bristles are more effective. Compared with conventional spray flushing, the use of a roller brush and increased roller pressure is more effective and can completely replace manual cleaning, thereby reducing labor and maintenance costs.

[0018] 4. The left and right air chambers are symmetrically distributed. The left air chamber, the cabinet cavity and the right air chamber together form a ventilation duct, which can accelerate air circulation, enhance air convection effect, increase ventilation volume and improve heat dissipation performance.

[0019] 5. The air is cooled by evaporation of the water curtain and then passes through the drying filter plate to reduce the humidity, so that the humidity of the air entering the cabinet does not exceed the set humidity value, solving the problem of moisture affecting electrical components, that is, realizing the independence of water and electricity.

[0020] 6. Since the desiccant is reusable, the moisture can be evaporated when its temperature rises, and the heat generated by the electrical components is fully utilized to heat the desiccant, so that it can restore its drying capacity. This ensures that the humidity of the air entering the cabinet does not exceed the set value, and avoids the waste of heat energy caused by direct heat discharge. At the same time, it also meets the heat dissipation requirements of the distribution cabinet, cleverly taking into account the heat dissipation performance, heat dissipation energy consumption and heat energy utilization, and meets the current social needs of energy conservation and emission reduction.

[0021] The present invention also provides a ventilation control method for a high and low voltage distribution cabinet. Based on the above-mentioned high and low voltage distribution cabinet for a new energy vehicle charging pile, the steps are as follows: First, the controller makes the fan of the left air chamber rotate forward and the first water pump start, and the fan of the right air chamber reverse. The external air enters from the waterproof filter of the left air chamber, passes through the water curtain and drying filter plate of the left air chamber, and the inner cavity of the cabinet in turn, and is then discharged from the right air chamber. The air circulates in the forward direction, and the air entering the cabinet is continuously cooled by the principle of evaporation and heat absorption. The temperature and humidity sensor sends the acquired real-time temperature and humidity data to the controller.

[0022] Then, after several hours, when the real-time humidity value exceeds the set humidity value, the filter desiccant in the left plenum approaches saturation, and dehumidification capacity decreases. The controller then stops the left plenum's first water pump, activates the electric heater, and reverses the fan. The fan in the right plenum rotates forward, and the first water pump starts. Outside air enters through the right plenum's waterproof filter, passes through the right plenum's water curtain, the filter desiccant, and the cabinet's interior, and then exits the left plenum, reversing the air flow. Heat generated by the power distribution cabinet and the electric heater continuously flows through the filter desiccant in the left plenum, drying the desiccant. The moisture in the desiccant is then expelled to the outside by the reverse-flowing air. The reverse-flowing air then enters the right plenum, where it is cooled by the water curtain and dehumidified by the filter desiccant, preventing excessive moisture from entering the cabinet. After the air reverses flow, the real-time humidity value captured by the temperature and humidity sensor becomes lower than the set humidity value.

[0023] After several hours, when the real-time humidity value exceeds the set humidity value, the controller stops the first water pump in the right plenum, activates the electric heater, and reverses the fan. The fan in the left plenum rotates forward, the electric heater stops, and the first water pump starts. Outside air enters through the waterproof filter in the left plenum, passes through the water curtain and drying filter plate in the left plenum, and then exits the right plenum. The real-time humidity value is now lower than the set humidity value. The reverse air flow is changed to forward air flow, and the cooling and dehumidification method is the same. Finally, this method is repeated to ensure that the air passing through the cabinet remains cool and dry.

[0024] Before entering the cabinet, air passes through a water curtain, trapping any dust in the air. As the dust accumulates, the water in the reservoir gradually becomes turbid. If the turbidity of the water in one or both reservoirs exceeds the set turbidity value, the controller initiates a cleaning procedure. For example, to clean the water curtain in the left air chamber, the controller first stops the first water pump and opens the solenoid valve in the valved drain pipe. After draining the wastewater, the solenoid valve in the valved drain pipe closes, and the solenoid valve in the corresponding valved fill pipe opens to replenish the water level to the set level. The controller then activates the second water pump, generating high-pressure water that sprays from the nozzle to flush the corresponding water curtain. Once the water curtain is clean, it is drained and refilled a second time. After completing the cleaning procedure, the controller resumes the activation of the first water pump in the left air chamber. To clean the water curtain in the right air chamber, the same cleaning procedure is followed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 The three-dimensional high and low voltage distribution cabinet of the new energy vehicle charging pile in embodiment 1 Figure 1 ; Figure 2 The three-dimensional high and low voltage distribution cabinet of the new energy vehicle charging pile in embodiment 1 Figure 2 ; Figure 3 is a three-dimensional diagram of the left air chamber in Example 1; Figure 4 for Figure 3 Schematic diagram of the drying filter plate and waterproof filter after being disassembled; Figure 5 for Figure 3 The diagram behind the hidden shell Figure 1 ; Figure 6 for Figure 3 The diagram behind the hidden shell Figure 2 ; Figure 7 This is a three-dimensional diagram of the left air chamber of the high and low voltage distribution cabinet of the new energy vehicle charging pile in Example 2; Figure 8 for Figure 7 Enlarged view of point A in the middle; Figure 9 Schematic cross-section of the distance retainer in Example 2; Figure 10 The three-dimensional structure of the water reservoir in Example 2 Figure 1 ; Figure 11 The three-dimensional structure of the water reservoir in Example 2 Figure 2 ; Figure 12 It is a structural diagram of the water reservoir in Example 2; Figure 13 for Figure 12 Enlarged view of point B in the middle; Figure 14 for Figure 11 A schematic diagram of a dust cleaning box hidden behind the top wall; Figure 15 It is a three-dimensional diagram of the dust-stained curtain in Example 2.

[0027] Reference numerals: cabinet 101, electrical component 102, left air chamber 201, right air chamber 301, housing 401, fan partition 402, drying filter plate 403, water curtain 404, vent 405, waterproof filter 406, water reservoir 407, first water pump 408, water receiving tray 409, water hole 410, guide plate 411, fan 412, chute 413, nozzle 414, second water pump 415, high-pressure pipe 416, low-pressure pipe 417, controller 418, temperature and humidity sensor 419, liquid level sensor 420, turbidity meter 421, drain pipe with valve 4 22. Water supply pipe with valve 423, handle 424, curtain frame 501, shaped curtain 502, cleaning roller 503, longitudinal groove 504, telescopic motor 505, synchronous frame 506, gear 507, fixed rack 508, movable rack 509, cross bar 510, spacer 511, center shaft 512, longitudinal hole 513, ball bearing 514, dust cleaning box 601, opening 602, drive roller 603, dust curtain 604, gear teeth 605, gate 606, exhaust pipe 607, air inlet cavity 608, air inlet pipe 609, dust blowing hole 610, protrusion or pit 611. DETAILED DESCRIPTION

[0028] In view of the deficiencies in the prior art, the inventors of this case have proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principles, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0029] Embodiment 1; like Figure 1 and Figure 2As shown, embodiment 1 provides a high and low voltage distribution cabinet for a new energy vehicle charging pile, including a cabinet body 101 and electrical components 102 installed in the cabinet body 101. The left and right side walls of the cabinet body 101 are penetrated, and a left air chamber 201 and a right air chamber 301 are installed on the left and right sides of the cabinet body 101 respectively, and the left air chamber 201 and the right air chamber 301 are respectively connected to the inner cavity of the cabinet body 101. The left air chamber 201 and the right air chamber 301 have the same structure and the internal structure of the left air chamber 201 and the internal structure of the right air chamber 301 are symmetrically distributed on both sides of the cabinet body 101. The left air chamber 201 and the right air chamber 301 have a symmetrical distribution structure. The left air chamber 201, the inner cavity of the cabinet body 101 and the right air chamber 301 together form a ventilation duct, which can accelerate air circulation and enhance the air convection effect.

[0030] like Figures 3 to 6As shown, the specific structure of the left and right air chambers 201 and 301 in this embodiment is as follows: each includes a housing 401, a fan baffle 402, a drying filter plate 403, and a water curtain 404. The fan baffle 402, drying filter plate 403, and water curtain 404 are installed horizontally in the housing 401 from the inside out. The left side wall of the housing 401 of the left air chamber 201 and the right side wall of the housing 401 of the right air chamber 301 are each provided with a vent 405 facing the cabinet 101, and each vent 405 is equipped with a waterproof filter 406. The waterproof filter 406 intercepts large debris, such as leaves, debris, and dirt. It also provides a waterproof function. The distance between the waterproof filter 406 and the water curtain 404 is close, so it can get wet without affecting the filtering function. Below the housing 401, a water reservoir 407 is located, facing the water curtain 404. A first water pump 408 is housed within the water reservoir 407, pumping water to the upper end of the water curtain 404. A water tray 409 is located above the upper end of the water curtain 404, with multiple downward-facing water holes 410. The water curtain 404 is equipped with multiple downward-curving guide vanes 411, with at least three of the guide vanes 411 corresponding to the upper ends of the guide vanes 411. The first water pump 408 is a low-pressure pump that pumps water from the water reservoir 407 into the water tray 409. The water then flows downward through the water holes 410 onto each guide vane 411 of the water curtain 404, ensuring a uniform dripping motion. The fan baffle 402 is equipped with three fans 412, but this number is not limited to three. The number of fans 412 depends on the size of the fans 412 and the height of the fan baffle 402, and is not limited to this in this embodiment. Each fan 412 is a DC fan that can rotate forward and reverse by changing the direction of the current. All fans 412 are evenly spaced longitudinally on the fan partition 402. There are six fans 412 in total. The three fans 412 on one fan partition 402 rotate in the same direction, while the three fans 412 on another fan partition 402 rotate in the opposite direction. The maximum wind speed is achieved when all six fans 412 rotate forward and reverse simultaneously. This creates an air convection effect, compensating for the wind resistance caused by the waterproof filter 406, the water curtain 404, and the drying filter plate 403, and quickly dissipating the heat generated by the electrical components 102.

[0031] The desiccant in the drying filter plate 403 of this embodiment is reusable, and an electric heating wire is provided inside the drying filter plate 403. The specific type of desiccant can be selected from the following materials: 1. Silica gel desiccant, primarily composed of silicon dioxide, has a porous structure, stable chemical properties, is non-toxic and odorless, and possesses high adsorption properties. Drying principle: Its porous structure absorbs moisture from the air, securing water molecules within its pores through physical adsorption. Recovery conditions: When the silica gel desiccant reaches saturation with water, it can be regenerated by heating. Drying at 100-120°C for several hours allows the adsorbed water to evaporate, restoring the silica gel desiccant's adsorption properties.

[0032] 2. Montmorillonite desiccant: Made from processed natural montmorillonite ore, its main component is montmorillonite, which has a layered structure and a large specific surface area, resulting in excellent adsorption properties. Drying principle: It absorbs moisture through the interaction between exchangeable cations between its layers and water molecules, as well as surface adsorption. Recovery conditions: After absorbing moisture, montmorillonite desiccant can be restored by drying at a relatively low temperature, generally at 60-80°C for several hours. However, its adsorption performance will gradually decline with repeated use.

[0033] 3. Fiber desiccant: Made from pure natural plant fibers through a special process, it is environmentally friendly, non-toxic, and has excellent moisture absorption properties. Drying principle: Plant fibers' natural water absorption and porous structure absorb moisture. Recovery conditions: Adsorbed moisture can be removed by low-temperature drying, generally at 40-60°C for several hours. However, the number of reusable uses is limited, typically a few to a dozen times, depending on usage conditions and desired drying results.

[0034] like Figure 4 As shown, in addition to the three desiccant materials mentioned above, there are also activated alumina desiccants and molecular sieve desiccants. However, the temperature required for their recovery is too high, making it difficult for the heat of the electrical component 102 to dry them, or the electric heating wire requires too much electricity, which cannot achieve the purpose of reducing heat dissipation energy consumption. The three desiccant materials mentioned above can all be used as fillers for the drying filter plate 403 in this embodiment. Montmorillonite desiccant and fiber desiccant have lower recovery conditions, but their corresponding water absorption capacity is not as good as that of silica gel desiccant, and the number of uses is limited. If montmorillonite desiccant and fiber desiccant are used, they need to be replaced according to their service life. Therefore, a slide 413 is provided on the rear side wall of each housing 401, or it can be provided on the front side wall, which is not limited in this embodiment. Each drying filter plate 403 is inserted horizontally into the housing 401 along the corresponding slide 413, thereby making the drying filter plate 403 and the housing 401 detachable. The desiccant inside the drying filter plate 403 has a limited lifespan. Once its lifespan has expired, the drying filter plate 403 can be removed, the desiccant replaced, and then inserted into the chute 413. This simple replacement operation reduces maintenance. To facilitate assembly and disassembly of the drying filter plate 403, two handles 424 are provided on the sides of the drying filter plate 403.

[0035] like Figure 5 and Figure 6 As shown, external air first enters the left or right air chamber 201 or 301 through the waterproof filter 406 of the vent 405. The waterproof filter 406 intercepts some dust, while the remaining dust is intercepted by the water curtain 404 and mixed into the water. After a period of time, the water curtain 404 itself becomes attached to dust. To address this issue, this embodiment provides two rows of longitudinally distributed nozzles 414 on the inner wall of each housing 401. The two rows of nozzles 414 are located between the corresponding drying filter plate 403 and the water curtain 404, and the water outlets of all nozzles 414 face the water curtain 404. Each water reservoir 407 is equipped with a second water pump 415 connected to the corresponding two rows of nozzles 414. Specifically, the second water pump 415 is connected to all nozzles 414 via a high-pressure pipe 416, while the first water pump 408 is connected to the upper end of the corresponding water receiving tray 409 via a low-pressure pipe 417. The second water pump 415 is a high-pressure water pump that pressurizes water and sprays it out from the nozzle 414 to wash away dirt attached to the surface of the water curtain 404, and then discharges the sewage in time, thereby keeping the circulating water clean.

[0036] To achieve functions such as automatic wind direction switching, automatic cleaning, automatic desiccant restoration, and automatic control of the power and start / stop of the fans 412 and water pumps according to heat dissipation requirements, this embodiment includes a controller 418 and a temperature and humidity sensor 419 within the cabinet 101. The controller 418 utilizes a stable and reliable industrial computer and can be programmed to perform the aforementioned functions. Furthermore, each water reservoir 407 is provided with a liquid level sensor 420 and a turbidity meter 421, and the bottom wall of each water reservoir 407 is provided with a valved drain pipe 422 and a valved water supply pipe 423. The input of the controller 418 is electrically connected to the temperature and humidity sensor 419, all turbidity meters 421, and all liquid level sensors 420, respectively. The output of the controller 418 is electrically connected to all fans 412, all first water pumps 408, all electric heating wires, all second water pumps 415, and the solenoid valves of the valved drain pipe 422 and the solenoid valve of the valved water supply pipe 423. The controller 418 can automatically change the wind direction according to the humidity value of the drying filter plate 403, automatically replenish water according to the liquid level sensor 420, and automatically clean pollutants according to the turbidity meter 421, without the need for manual processing, and has a high degree of intelligence.

[0037] Example 2: Example 2 provides another high- and low-voltage distribution cabinet for a new energy vehicle charging pile. The high- and low-voltage distribution cabinet for a new energy vehicle charging pile in Example 2 is identical in most structures to that of Example 1. The difference lies in the structure of the water curtain 404. The water curtain 404 structure in Example 2 is intended to solve the problem of oil particles in the air being difficult to remove after adhering to the water curtain 404. That is, most existing charging piles / stations are located next to or around roads. Once oil particles and other inorganic particles in automobile exhaust adhere to the water curtain 404, it is difficult to achieve the cleaning purpose by simply flushing. To address this problem, this embodiment adds the function of cleaning the water curtain 404. The specific structure of the water curtain 404 is as follows: The water curtain 404 in this embodiment includes a curtain frame 501, an elastically deformable shaping curtain 502, a cleaning roller 503, and a drive mechanism. The shaping curtain 502 is provided in multiple pieces, and the specific number of shaping curtains 502 depends on the width of the curtain frame 501. The wider the curtain frame 501, the more shaping curtains 502 there are. All shaping curtains 502 are wavy and can maintain this wavy state. The shaping curtains 502 can also be straightened to elastically deform, and after being straightened, they can also return to their original wavy state under the action of elastic force.

[0038] The upper and lower ends of each shaped curtain fabric 502 are fixedly connected to the upper and lower edges of the curtain frame 501, respectively. All shaped curtain fabrics 502 are evenly spaced laterally along the width of the curtain frame 501, which is fixed inside the corresponding housing 401. Three cleaning rollers 503 are located between each pair of adjacent shaped curtain fabrics 502. The drive mechanism is connected to the corresponding housing 401 and all cleaning rollers 503 are in transmission connection. The specific structure of the drive mechanism in this embodiment is as follows: The drive mechanism includes a telescopic motor 505 and a synchronous frame 506. The telescopic motor 505 is longitudinally fixed to the upper end of the corresponding housing 401, and the upper end of the telescopic shaft of the telescopic motor 505 is fixedly connected to the synchronous frame 506. Each cleaning roller 503 is equipped with a coaxially fixed gear 507 at each end. The left and right sides of each gear 507 mesh with a vertical fixed rack 508 and a vertical movable rack 509, respectively. The upper and lower ends of all the fixed racks 508 are fixedly connected to the curtain frame 501, while the upper ends of all the movable racks 509 extend through the top wall of the corresponding housing 401 and are then fixedly connected to the synchronous frame 506. The telescopic motor 505 drives all the movable racks 509 to move up and down, thereby causing all the cleaning rollers 503 to rotate and move up and down synchronously. Each movable rack 509 is staggered with respect to the adjacent fixed rack 508. The lower ends of all movable racks 509 on the same side of the shaped curtain fabric 502 are fixedly connected by a cross bar 510, and the cross bar 510 is staggered with respect to the fixed rack 508. The width of each gear 507 is uniformly smaller than the sum of the widths of the fixed rack 508 and the movable rack 509. The gear 507 is wide enough to ensure that it effectively engages with the fixed rack 508 and the movable rack 509 while allowing the fixed rack 508 and the movable rack 509 to be staggered. The purpose of staggering the fixed rack 508 and the movable rack 509 is to prevent the cross bar 510 at the lower end of the movable rack 509 from conflicting with the fixed rack 508 during the lifting process.

[0039] In addition, a spacer 511 is mounted on the central axis 512 of each gear 507. The fixed rack 508 and the movable rack 509 on the left and right sides of the gear 507 respectively penetrate the spacer 511. The spacer 511 and the fixed rack 508, as well as the spacer 511 and the movable rack 509, are rollingly connected via balls 514. Specifically, the spacer 511 has a longitudinal hole 513, in which the gear 507, the movable rack 509, and the fixed rack 508 are meshed. The three side surfaces of the movable rack 509 and the three side surfaces of the fixed rack 508 are provided with longitudinal grooves 504 adapted to the balls 514. The spacer 511 is provided with balls 514 corresponding to each longitudinal groove 504. During the lifting and lowering process of the movable rack 509, the movable rack 509 moves relative to the spacer 511 through the balls 514, and the spacer 511 and the fixed rack 508 move relative to each other through the balls 514, and the spacer 511 rotates relative to the gear 507 through the central axis 512 of the gear 507, thereby forming a double-rack single gear 507 structure. In order to make all the movable racks 509 on each side of the shaped curtain 502 run more stably and not eccentric, the upper ends of all the movable racks 509 on each side are fixedly connected by the synchronous frame 506 to form a whole, and the lower ends are fixedly connected by the crossbar 510 to form a whole. All the movable racks 509 on each side form a whole, and each one is not loose. The telescopic motor 505 drives all the movable racks 509 to rise and fall synchronously, so that the gear 507 is always in a meshing state, maintaining an effective transmission relationship. The function of the spacer 511 is: first, each end of each cleaning roller 503 keeps the gear 507 in a meshing state with the corresponding fixed rack 508 and movable rack 509 through the spacer 511. Secondly, the gap between the spacer 511 and the movable rack 509 or the fixed rack 508 is extremely small, and a rolling connection relationship is formed by the ball 514. The spacer 511 can keep the corresponding cleaning roller 503 in a horizontal state at all times, avoiding the problem of one high and one low at the two ends of the cleaning roller 503, and keeping the gear 507 from being misaligned with the movable rack 509 or the fixed rack 508.

[0040] In this embodiment, all cleaning rollers 503 are provided with bristles. The cleaning rollers 503 adopt a cleaning method of rolling brushes and increasing the pressure of the rolling brushes, and cooperate with the high-pressure spraying of the nozzles 414 to effectively remove stubborn dirt on the shaping curtain 502. The dirt is dropped into the water reservoir 407 with the water flow and is finally discharged from the drain pipe 422 with a valve, which can completely replace manual cleaning, thereby reducing labor maintenance costs.

[0041] As can be seen from the structure of the cleaning water curtain 404, dust attached to the water curtain 404 can be removed by the cleaning roller 503 and dropped into the water reservoir 407 along with the water flow. Some of the dust in the water is discharged through the valved drain pipe 422, but another part of the dust in the water adheres to the inner surfaces of the four side walls of the water reservoir 407. In order to remove the dust in the water reservoir 407, the structure of the water reservoir 407 is optimized as follows in this embodiment: like Figures 10 to 14 As shown, each of the four side walls of the water reservoir 407 is provided with a cleaning box 601 having a concave cross-section, and each side wall has two openings 602 that communicate with the corresponding cleaning box 601. Each cleaning box 601 is equipped with an annular dust curtain 604 and a drive roller 603 for driving the dust curtain 604. The dust curtain 604 extends into the interior of the water reservoir 407 through the two openings 602, thereby covering the inner surface of the corresponding side wall. To prevent slippage between the drive roller 603 and the dust curtain 604, the inner surface of the dust curtain 604 is provided with at least one row of transversely arranged teeth and grooves. The drive roller 603 is provided with a circle of gear teeth 605 that adapt to the teeth and grooves. The gear teeth 605 engage with the teeth and grooves, thereby driving the dust curtain 604 to circulate. The upper end of each drive roller 603 extends out of the dust box 601. After extending, the drive roller 603 is rotatably connected to the drive motor at the upper end of the dust box 601, and the drive motor drives the drive roller 603 to rotate. The drive motor is not shown in the figure. Each dust box 601 is equipped with a gate 606 that extends into the dust box 601 to cut off the inner cavity of the dust box 601. Each gate 606 is driven by a telescopic motor 505. The telescopic motor 505 drives the gate 606 to be inserted into or removed from the dust box 601. However, a sliding seal is formed between the dust box 601 and the gate 606, and the gate 606 cannot be completely removed from the dust box 601, thereby preventing water from leaking out of the dust box 601. The top wall of each ash cleaning box 601 is provided with an exhaust pipe 607. The inner cavity between each ash cleaning box 601 and the corresponding side wall forms an air intake cavity 608, and the top wall of the air intake cavity 608 is provided with an air intake pipe 609. The side wall adjacent to each ash cleaning box 601 and the air intake cavity 608 is covered with ash blowing holes 610 connected to the air intake cavity 608. In addition, Figure 15 As shown, in order to improve the dust collecting curtain 604's ability to capture dust in the water, the outer side surface of the portion of the dust collecting curtain 604 located in the water reservoir 407 is covered with protrusions or pits 611 .

[0042] In this embodiment, the dust curtain 604 covers the inner surface of the side wall of the water reservoir 407. The dust curtain 604 directly contacts the side wall of the water reservoir 407 instead of the side wall of the water reservoir 407. Dust in the water adheres to the surface of the dust curtain 604, thereby keeping the side wall of the water reservoir 407 clean. The dust attached to the dust curtain 604 is cleaned according to the following cleaning method: The controller 418 in this embodiment is electrically connected to all telescopic motors 505 and all driving motors, the air inlet pipe 609 is connected to an external high-pressure air supply system, and the exhaust pipe 607 is connected to an external dust bag.

[0043] After the wastewater in the water reservoir 407 is drained, step one: the controller 418 activates all drive motors to move the corresponding dust curtains 604, moving the portion of the dust curtains 604 located in the water reservoir 407 into the dust cleaning box 601. Step two: the controller 418 activates all telescopic motors 505 to drive the corresponding gates 606 into the dust cleaning box 601, isolating the interior of the dust cleaning box 601 from the interior of the water reservoir 407. Step three: an external high-pressure air supply system introduces dry, high-pressure air into the air inlet chamber 608. The high-pressure air is ejected from the dust blowing holes 610, blowing from the inside to the outside of the dust curtains 604, easily dislodging any attached dust and allowing it to enter the external dust bag through the exhaust pipe 607, where it is ultimately collected. Step four: the controller 418 deactivates the external high-pressure air supply system, causing the telescopic motors 505 to reset the corresponding gates 606, and the drive motors to reset the corresponding dust curtains 604. Finally, clean water is added to the water reservoir 407 and the dust cleaning is completed.

[0044] In this embodiment, all water curtains 404 and all water reservoirs 407 are cleaned simultaneously, and the dust is thoroughly cleaned, which greatly reduces the residual dust. After adding clean water, clean circulating water can be guaranteed to flow through the water curtains 404. After long-term operation, the high and low voltage distribution cabinets can still maintain a high cleanliness index inside the cabinet body 101 without relying on manual cleaning.

[0045] Example 3: The third embodiment provides a ventilation control method for a high and low voltage distribution cabinet. Based on the high and low voltage distribution cabinet for a new energy vehicle charging pile in the first embodiment, the method is as follows: First, the controller 418 makes the fan 412 of the left air chamber 201 rotate forward and the first water pump 408 start, and the fan 412 of the right air chamber 301 reverse. The external air enters from the waterproof filter 406 of the left air chamber 201, passes through the water curtain 404 and the drying filter plate 403 of the left air chamber 201, and the inner cavity of the cabinet 101 in turn, and is then discharged from the right air chamber 301. The air circulates in the forward direction, and the principle of evaporation and heat absorption is used to continuously cool the air entering the cabinet 101. The temperature and humidity sensor 419 sends the acquired real-time temperature and humidity data to the controller 418.

[0046] Then, after several hours, when the real-time humidity value is greater than the set humidity value, the drying filter plate 403 of the left air chamber 201 is close to saturation and the dehumidification capacity decreases. At this time, the controller 418 stops the first water pump 408 of the left air chamber 201, starts the electric heating wire and reverses the fan 412, and the fan 412 of the right air chamber 301 rotates forward and the first water pump 408 starts. The outside air enters from the waterproof filter 406 of the right air chamber 301, passes through the water curtain 404 and the drying filter plate 403 of the right air chamber 301, and the inner cavity of the cabinet 101 in turn, and is then discharged from the left air chamber 201, and the air circulates in the opposite direction. Utilizing the heat generated by the power distribution cabinet and the electric heating wire, hot air continuously flows through the drying filter plate 403 in the left air chamber 201, drying the desiccant inside the drying filter plate 403. The moisture in the desiccant is then expelled to the outside by the reverse-circulating air. After entering the right air chamber 301, the reverse-circulating air is cooled by the water curtain 404 in the right air chamber 301 and dehumidified by the drying filter plate 403, thereby preventing a large amount of moisture from entering the interior of the cabinet 101. After the reverse-circulating air is circulated, the real-time humidity value captured by the temperature and humidity sensor 419 is less than the set humidity value.

[0047] After several hours, when the real-time humidity value exceeds the set humidity value, controller 418 stops first water pump 408 in right plenum 301, activates the electric heating wire, and reverses fan 412. Fan 412 in left plenum 201 rotates forward, the electric heating wire stops, and first water pump 408 starts. External air enters through waterproof filter 406 in left plenum 201, passes through water curtain 404 and drying filter plate 403 in left plenum 201, and then through the inner cavity of cabinet 101 before being discharged from right plenum 301. The real-time humidity value is now less than the set humidity value. The reverse air circulation is changed to forward air circulation, and the cooling and dehumidification method is the same. Finally, this method is repeated to ensure that the air passing through cabinet 101 remains cool and dry.

[0048] Before entering cabinet 101, air first passes through water curtain 404, trapping dust in the air. As the dust accumulates, the water in reservoir 407 gradually becomes turbid. If the turbidity of the water in one or both reservoirs 407 exceeds a set turbidity value, controller 418 executes a cleaning procedure. For example, to clean the water curtain 404 in left air chamber 201, controller 418 first stops first water pump 408 in left air chamber 201 and opens the solenoid valve of valved drain pipe 422. After draining the wastewater, the solenoid valve of valved drain pipe 422 closes, and the solenoid valve of the corresponding valved water supply pipe 423 opens to replenish the water level to the set level. Controller 418 then activates second water pump 415, generating high-pressure water that is ejected from nozzle 414 to flush the corresponding water curtain 404. After the water curtain 404 is rinsed, it is drained and replenished again. After completing the cleaning procedure, controller 418 resumes activation of first water pump 408 in left air chamber 201. If cleaning the water curtain 404 of the right air chamber 301, follow the same cleaning procedure.

[0049] Furthermore, the above method also involves a scheme for regulating heat dissipation energy consumption in response to heat dissipation requirements. For example, in winter, when heat dissipation requirements are low, controller 418 can activate one or both fans 412 to reduce ventilation. Alternatively, the power of the water pump can be controlled to reduce the water flow through water curtain 404 to reduce the cooling effect. Specifically, controller 418 controls heat dissipation energy consumption based on the real-time temperature feedback from temperature and humidity sensor 419, minimizing the energy consumption of fans 412 and water pumps while meeting heat dissipation requirements. This reduces heat dissipation energy consumption.

[0050] The above method also involves a control scheme for desiccant recovery energy consumption. A temperature sensor electrically connected to the sensor input is provided within the drying filter plate 403. If the discharged hot air fails to reach the desiccant's recovery temperature, the controller 418 activates the electric heating wires, which are evenly distributed within the drying filter plate 403 to uniformly heat the desiccant. If the discharged hot air fails to reach the desiccant's recovery temperature, the controller 418 does not activate the electric heating wires. The electric heating wires serve as temperature compensation. The controller 418 activates and deactivates the electric heating wires and their heating time accordingly based on the real-time temperature, thereby reducing heat dissipation energy consumption.

[0051] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make some simple deductions or substitutions without departing from the concept of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high and low voltage distribution cabinet for a new energy vehicle charging pile, comprising a cabinet body (101) and electrical components (102) installed in the cabinet body (101); Its characteristics are: A left air chamber (201) and a right air chamber (301) are respectively installed on the left and right sides of the cabinet (101), and the left air chamber (201) and the right air chamber (301) are respectively communicated with the inner cavity of the cabinet (101); the left air chamber (201) and the right air chamber (301) have the same structure, and the internal structure of the left air chamber (201) and the internal structure of the right air chamber (301) are symmetrically distributed on both sides of the cabinet (101); The left air chamber (201) and the right air chamber (301) both comprise a housing (401), a fan baffle (402), a drying filter plate (403) and a water curtain (404); a side wall of the housing (401) is provided with a ventilating opening (405) opposite to the cabinet (101); the fan baffle (402), the drying filter plate (403) and the water curtain (404) are sequentially installed in the housing (401) in a transverse order from the inside to the outside; a water reservoir (407) is provided below the housing (401) and directly opposite to the water curtain (404); a first water pump (408) for pumping water to the upper end of the water curtain (404) is provided in the water reservoir (407); The desiccant of the drying filter plate (403) is reusable, and an electric heating wire is provided inside the drying filter plate (403); The water curtain (404) comprises a curtain frame (501), an elastically deformable shaping curtain (502), a cleaning roller (503) and a driving mechanism; the shaping curtain (502) is provided with a plurality of strips, all of which are in a wavy shape, the upper end and the lower end of each shaping curtain (502) are respectively fixedly connected to the upper side and the lower side of the curtain frame (501), and all of the shaping curtains (502) are horizontally distributed at equal intervals; at least two cleaning rollers (503) are provided between each two adjacent shaping curtains (502), the driving mechanism is connected to the corresponding housing (401), and the driving mechanism is transmission-connected to all of the cleaning rollers (503), and the driving mechanism drives the cleaning rollers (503) to rotate and reciprocate up and down, thereby causing the cleaning rollers (503) to remove dirt attached to the shaping curtains (502).

2. A high and low voltage distribution cabinet for a new energy vehicle charging pile according to claim 1, characterized in that: The driving mechanism includes a telescopic motor (505) and a synchronous frame (506), wherein the telescopic motor (505) is longitudinally fixed to the upper end of the corresponding housing (401), and the upper end of the telescopic shaft of the telescopic motor (505) is fixedly connected to the synchronous frame (506); Each cleaning roller (503) is provided with a coaxially fixed gear (507) at both ends. The left and right sides of each gear (507) are respectively engaged with a vertical fixed rack (508) and a vertical movable rack (509). The upper ends of all movable racks (509) pass through the top wall of the corresponding shell (401) and are then fixedly connected to the synchronous frame (506). The telescopic motor (505) drives all the movable racks (509) to move up and down, thereby causing all the cleaning rollers (503) to rotate and move up and down synchronously.

3. A high and low voltage distribution cabinet for a new energy vehicle charging pile according to claim 2, characterized in that: Each movable rack (509) is staggered with the adjacent fixed rack (508), and the lower ends of all movable racks (509) located on the same side of the shaped curtain fabric (502) are fixedly connected by a cross bar (510), and the cross bar (510) is staggered with the fixed rack (508); a spacer (511) is sleeved on the central axis (512) of each gear (507), and the fixed racks (508) and movable racks (509) on the left and right sides of the gear (507) respectively pass through the spacer (511), and the spacer (511) and the fixed rack (508), as well as the spacer (511) and the movable rack (509) are rollingly connected by balls (514).

4. A high and low voltage distribution cabinet for a new energy vehicle charging pile according to claim 1, characterized in that: The inner wall of each shell (401) is provided with two rows of longitudinally distributed nozzles (414), the two rows of nozzles (414) are located between the corresponding drying filter plate (403) and the water curtain (404), and the water outlets of all the nozzles (414) are directed toward the water curtain (404); each water reservoir (407) is provided with a second water pump (415) connected to the corresponding two rows of nozzles (414).

5. A high and low voltage distribution cabinet for a new energy vehicle charging pile according to claim 4, characterized in that: The fan partition (402) is provided with at least two fans (412), each fan (412) can rotate forward and reverse, and all fans (412) are longitudinally distributed on the fan partition (402).

6. A high and low voltage distribution cabinet for a new energy vehicle charging pile according to claim 5, characterized in that: A slide groove (413) is provided on the front side wall or the rear side wall of each shell (401), and each drying filter plate (403) is laterally inserted into the shell (401) along the corresponding slide groove (413), thereby making the drying filter plate (403) and the shell (401) detachably connected.

7. A high and low voltage distribution cabinet for a new energy vehicle charging pile according to claim 6, characterized in that: Each vent (405) is provided with a waterproof filter (406).

8. A high and low voltage distribution cabinet for a new energy vehicle charging pile according to claim 7, characterized in that: A controller (418) and a temperature and humidity sensor (419) are provided in the cabinet (101); a liquid level sensor (420) and a turbidity meter (421) are provided in each water reservoir (407); and a valved sewage pipe (422) and a valved water supply pipe (423) are provided on the bottom wall of the water reservoir (407); the input end of the controller (418) is electrically connected to the temperature and humidity sensor (419), all the turbidity meters (421), and all the liquid level sensors (420), and the output end of the controller (418) is electrically connected to all the fans (412), all the first water pumps (408), all the electric heating wires, all the second water pumps (415), the solenoid valves of the valved sewage pipe (422), and the solenoid valves of the valved water supply pipe (423).

9. A high and low voltage distribution cabinet for a new energy vehicle charging pile according to claim 8, characterized in that: A dust cleaning box (601) with a concave cross-section is provided on the outside of each of the four side walls of the water reservoir (407), and each side wall is provided with two openings (602) communicating with the corresponding dust cleaning box (601); each dust cleaning box (601) is provided with an annular dust curtain (604) and a driving roller (603) for driving the dust curtain (604) to move, and the dust curtain (604) extends into the interior of the water reservoir (407) through the two openings (602), thereby allowing the dust curtain (604) to cover the inner surface of the corresponding side wall; Each ash cleaning box (601) is provided with a gate plate (606) extending into the interior of the ash cleaning box (601) for cutting off the inner cavity of the ash cleaning box (601); the top wall of each ash cleaning box (601) is provided with an exhaust pipe (607); the inner cavity between each ash cleaning box (601) and the corresponding side wall forms an air intake cavity (608), and the top wall of the air intake cavity (608) is provided with an air intake pipe (609); the side walls of each ash cleaning box (601) adjacent to the air intake cavity (608) are covered with ash blowing holes (610) connected to the air intake cavity (608).

10. A ventilation control method for a high and low voltage distribution cabinet, characterized in that: Based on the high and low voltage distribution cabinet for the new energy vehicle charging pile according to claim 8, the steps are as follows: S1, the controller (418) causes the fan (412) of the left air chamber (201) to rotate forward and the first water pump (408) to start, and the fan (412) of the right air chamber (301) to rotate reversely, and the external air enters from the waterproof filter (406) of the left air chamber (201), passes through the water curtain (404) and the drying filter plate (403) of the left air chamber (201), and the inner cavity of the cabinet (101), and then is discharged from the right air chamber (301), and the temperature and humidity sensor (419) sends the acquired real-time temperature and humidity data to the controller (418); S2. When the real-time humidity value is greater than the set humidity value, the controller (418) stops the first water pump (408) of the left air chamber (201), starts the electric heating wire, and reverses the fan (412), and the fan (412) of the right air chamber (301) rotates forward and starts the first water pump (408). External air enters from the waterproof filter (406) of the right air chamber (301), passes through the water curtain (404) and the drying filter plate (403) of the right air chamber (301), and the inner cavity of the cabinet (101), and is then discharged from the left air chamber (201). The real-time humidity value is less than the set humidity value. S3. When the real-time humidity value is greater than the set humidity value, the controller (418) stops the first water pump (408) of the right air chamber (301), starts the electric heating wire, and reverses the fan (412), and the fan (412) of the left air chamber (201) rotates forward, stops the electric heating wire, and starts the first water pump (408). External air enters from the waterproof filter (406) of the left air chamber (201), passes through the water curtain (404) and the drying filter plate (403) of the left air chamber (201), and the inner cavity of the cabinet (101), and is then discharged from the right air chamber (301). The real-time humidity value is less than the set humidity value. S4, repeating S2 and S3, so that the air passing through the cabinet (101) remains low temperature and dry. However, when the real-time turbidity value sent to the controller (418) by one or both turbidity meters (421) in S2 and S3 is greater than the set turbidity value, the corresponding first water pump (408) stops and the solenoid valve of the valved sewage pipe (422) opens. After the sewage is discharged, the solenoid valve of the valved sewage pipe (422) closes, and the solenoid valve of the corresponding valved water supply pipe (423) opens to replenish the water level to the set water level. The controller (418) operates the second water pump (415), and the generated high-pressure water is sprayed from the nozzle (414) to flush the corresponding water curtain (404). After the water curtain (404) is flushed, it is drained and replenished for a second time, and finally the corresponding first water pump (408) is started.

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