Waterproof and moistureproof AC low-voltage power distribution cabinet

Abstract

The invention discloses a waterproof and moistureproof AC low-voltage power distribution cabinet, and relates to the technical field of electric power, the waterproof and moistureproof AC low-voltage power distribution cabinet comprises a sealing box and a supporting box, the supporting box is internally provided with a cooling and dehumidifying mechanism, the cooling and dehumidifying mechanism comprises a first fan and a dehumidifying bin, the dehumidifying bin comprises a first bin body and a second bin body, and the side wall of the first bin body is provided with a plurality of semiconductor chilling plates; the semiconductor chilling plate comprises a refrigeration end and a heating end, the refrigeration end faces the first bin body, the heating end faces the second bin body, and a plurality of vent holes are formed in the bottom of the first bin body; a plurality of air outlets and a plurality of suction openings are formed in the inner wall of the sealing box, the air outlets are opposite to the suction openings, third air pipes are arranged between the air outlets and the first bin body, and the suction openings are connected with fourth air pipes. Therefore, the flowing air carries heat away from the heating end, the cooling efficiency of the refrigeration end is improved, the temperature of the air is suddenly reduced after the air enters the first bin body, and the water vapor condensation speed is increased.

Description

Technical Field

[0001] The invention relates to the field of electric power technology, and in particular to a waterproof and moisture-proof AC low-voltage power distribution cabinet. Background Art

[0002] The distribution cabinet is a general term for the center of the motor control system. The distribution cabinet is generally used in situations where there are fewer circuits and more dispersed loads, while the motor control center is generally used in situations where there are more circuits and more concentrated loads. They distribute the electrical energy of a circuit of the upper-level distribution equipment to the nearest load, and the distribution cabinet is a device that can provide protection, monitoring and control for the load.

[0003] Since the cabinet integrates circuit breakers, contactors, instruments and other electrical components, the high-density heat generated during operation needs to be discharged in time through the heat dissipation structure. In the prior art, natural convection heat dissipation solutions are mostly used, and air circulation is achieved by setting ventilation holes on both sides of the cabinet.

[0004] However, on rainy days, rainwater from outside can easily enter the distribution cabinet through the ventilation holes, causing damage to the internal electrical components. The existing rain protection measures generally include installing a waterproof cover, but the waterproof cover will hinder air flow, greatly reducing the cooling efficiency inside the cabinet, which will cause the electrical components to age faster due to high temperature. Therefore, how to achieve waterproof and moisture-proof of the distribution cabinet while maintaining efficient heat dissipation has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0005] In view of the above defects, the purpose of the present invention is to provide a waterproof and moisture-proof AC low-voltage distribution cabinet, aiming to solve the problem in the prior art that it is difficult to achieve waterproof and moisture-proof of the distribution cabinet while maintaining efficient heat dissipation.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: A waterproof and moisture-proof AC low-voltage power distribution cabinet, comprising a sealed box and a support box, the support box is located at the bottom of the sealed box, an air inlet is provided on one side of the support box, an air outlet is provided on the other side of the support box, a cooling and dehumidifying mechanism is installed in the support box, the cooling and dehumidifying mechanism comprises a first fan and a dehumidifying bin, the dehumidifying bin comprises a first bin body and a second bin body, the first bin body is located inside the second bin body, a plurality of semiconductor refrigeration sheets are installed on the side wall of the first bin body, the semiconductor refrigeration sheets comprise a cooling end and a heating end, the cooling end faces the inside of the first bin body, the heating end faces the side wall of the second bin body, a first air duct is provided between the first fan and the top of the second bin body, a plurality of vents are provided at the bottom of the first bin body, one end of the vent is connected to the first bin body, and the other end of the vent is connected to the second bin body; A plurality of air outlets and a plurality of air extraction ports are provided on the inner wall of the sealed box. The air outlets and the air extraction ports are arranged opposite to each other. A third air duct is provided between the air outlet and the first chamber. The air extraction port is connected to a fourth air duct, and the end of the fourth air duct away from the sealed box is connected to the air discharge port.

[0007] Wherein, the dehumidification chamber further includes a third chamber, the third chamber is arranged around the second chamber, the heating end is connected with a heat pipe, the heat pipe extends towards the third chamber, and at least part of the heat pipe is located in the third chamber; A multi-way valve is provided between the third chamber and the first fan, an air inlet pipe is provided between the multi-way valve and the first fan, one end of the first air duct is connected to the multi-way valve, the other end of the first air duct is connected to the second chamber, and a second air duct is provided between the multi-way valve and the top of the third chamber, and an air outlet is provided at the bottom of the third chamber.

[0008] Wherein, the heat pipe is a U-shaped heat pipe, a heat conduction sheet is provided between the middle region of the U-shaped heat pipe and the heating end, the heat conduction sheet is thermally connected to the U-shaped heat pipe, and a heat conduction adhesive is filled between the heat conduction sheet and the heating end.

[0009] Wherein, a fixing plate is connected to the outer wall of the U-shaped heat pipe, the fixing plate is located in the third chamber, a limiting spring is provided between the fixing plate and the side wall of the second chamber, a first threaded hole is provided on the fixing plate, and a second threaded hole matching the first threaded hole is provided on the side wall of the second chamber, and the first threaded hole and the second threaded hole are bolt-connected.

[0010] Wherein, a plurality of radiating fins are provided on the side wall of the U-shaped heat pipe, a part of the radiating fins are located in the second chamber, and another part of the radiating fins are located in the third chamber.

[0011] Wherein, a plurality of fixing holes are provided on the side wall of the first chamber, one end of the fixing hole faces the inside of the first chamber, the other end of the fixing hole extends towards the second chamber, the semiconductor refrigeration sheet is installed in the fixing hole, a plurality of condensation meshes are provided in the first chamber, the semiconductor refrigeration sheet is arranged around the condensation meshes, and the refrigerating end is thermally connected to the condensation meshes.

[0012] Wherein, a collection tank is provided at the bottom of the first chamber, and a drainage pipe is connected to the bottom of the collection tank.

[0013] Wherein, the cooling and dehumidifying mechanism further includes a filter disc, the first fan includes an air inlet cover, an air extraction pipe is provided between the air inlet cover and the first fan, and the filter disc covers the air inlet cover.

[0014] Among them, a filter chamber is also installed in the support box, the filter disc is located in the filter chamber, the filter disc includes a support ring and a support shaft, the support shaft is located at the center of the support ring, and a filter screen is arranged between the support ring and the support shaft; the filter chamber includes a dust removal area and a cleaning area, an isolation strip is arranged between the dust removal area and the cleaning area, the air inlet hood covers the dust removal area, an isolation bin is installed at the top of the cleaning area, a water storage tank is installed in the isolation bin, a water spray head and a blowing head are installed between the isolation bin and the cleaning area, a micro water pump is installed between the water spray head and the water storage tank, the water storage tank and the water spray head are both connected to the micro water pump through pipelines, and the water storage tank is connected to one end of the drainage pipeline far away from the first bin body; the end of the fourth air duct far away from the air extraction port is connected to the blowing head.

[0015] Among them, a collection bin is arranged on one side of the cleaning area far away from the isolation bin, the top of the collection bin covers the cleaning area, the bottom of the collection bin is connected to a separation box, a second fan is arranged between the separation box and the air outlet, a fifth pipeline is arranged between the separation box and the second fan, a sixth pipeline is arranged between the second fan and the air outlet, and a water outlet pipeline is arranged between the separation box and the outer wall of the support bin; a driving motor is installed on the side wall of the isolation bin, an annular groove is arranged on the outer wall of the support ring, a driving wheel is installed at the power end of the driving motor, and a driving belt is arranged between the driving wheel and the annular groove; the isolation strip includes a fixed arm and a rubber strip, a bearing sleeve is arranged around the wall of the support shaft, one end of the fixed arm is connected to the inner wall of the filter chamber, the other end of the fixed arm is connected to the outer wall of the bearing sleeve, and the rubber strip contacts the filter net.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are: First, the sealed box is sealed separately, and the air needs to be dried and cooled by the cooling and dehumidifying mechanism before being sent into the sealed box, which avoids the problem of water vapor entering the power distribution cabinet due to direct air convection in the traditional power distribution cabinet technology, and further avoids the short circuit problem caused by dampness. Second, after the air enters the cooling and dehumidifying mechanism, it is first heated by the heating end in the second bin body, and then enters the first bin body to be cooled by the refrigerating end to condense moisture. During this process, the flowing air takes away the heat from the heating end, which accelerates the cooling efficiency of the refrigerating end; at the same time, since the air temperature is relatively high, the temperature of the air drops suddenly after entering the first bin body, which speeds up the water vapor condensation speed. Description of the Drawings

[0017] Figure 1 It is the structure diagram of the waterproof and moisture-proof AC low-voltage power distribution cabinet in Embodiment 1; Figure 2 It is the internal pipeline connection diagram of the power distribution cabinet; Figure 3 It is the structure diagram of the dehumidification bin; Figure 4 is Figure 3 a partial enlarged view of a in; Figure 5 is the heat pipe structure diagram in Embodiment 1; Figure 6 is the heat pipe structure diagram in Embodiment 2; Figure 7 is the structure diagram of the waterproof and moisture-proof AC low-voltage power distribution cabinet in Embodiment 3; Figure 8 is the structure diagram of the support box in Embodiment 3; Figure 9 is the structure diagram of the filter disc; Figure 10 is the top view of the filter disc; Figure 11 Structure diagram of the isolation strip.

[0018] In the figure: 1 - Sealed box, 11 - Air outlet, 12 - Air extraction port, 13 - Third air duct, 14 - Fourth air duct, 2 - Support box, 21 - Air inlet, 22 - Air discharge port, 23 - Multi-way valve, 231 - Second air duct, 232 - Air inlet duct, 3 - Cooling and dehumidifying mechanism, 31 - Dehumidification chamber, 311 - First chamber, 3111 - Collection tank, 312 - Second chamber, 313 - Third chamber, 314 - Air outlet, 32 - First fan, 321 - Air extraction duct, 322 - Air inlet hood, 33 - Semiconductor refrigeration sheet, 331 - Refrigeration end, 332 - Heating end, 333 - Heat pipe, 3331 - Heat sink, 334 - Heat conducting sheet, 335 - Heat conducting glue, 336 - Fixed plate, 337 - Limit spring, 338 - First threaded hole, 339 - Second threaded hole, 340 - Bolt, 34 - First air duct, 35 - Ventilation hole, 36 - Baffle, 37 - Condensation net, 38 - Drainage pipe, 4 - Filter disc, 41 - Filter chamber, 42 - Support ring, 43 - Support shaft, 44 - Filter screen, 45 - Isolation strip, 451 - Fixed arm, 452 - Rubber strip, 46 - Dust removal area, 47 - Cleaning area, 48 - Bearing sleeve, 5 - Isolation chamber, 51 - Water storage tank, 52 - Micro water pump, 53 - Sprinkler head, 54 - Air blowing head, 6 - Collection chamber, 61 - Separation box, 62 - Fifth pipe, 63 - Water outlet pipe, 64 - Second fan, 65 - Sixth pipe, 7 - Driving motor, 71 - Driving wheel, 72 - Annular groove, 73 - Driving belt. Detailed implementation manners

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Embodiment 1: As Figures 1-5As shown in the figure, there is a waterproof and moisture-proof AC low-voltage power distribution cabinet, including a sealed box 1 and a support box 2, and the support box 2 is located at the bottom of the sealed box 1. The sealed box 1 in this solution is used to carry various electrical components. To ensure the sealing performance and reduce the probability of internal electronic components getting damp, no ventilation holes for guiding air flow are opened in the sealed box 1 in this solution, and the through holes for guiding the incoming and outgoing lines are also filled with gaskets to reduce the probability of external air directly entering the sealed box 1.

[0021] Due to the high sealing performance of the sealed box 1, although this reduces the probability of water vapor entering the sealed box 1, the lack of air flow will cause the electronic components in the sealed box 1 to overheat and be damaged. For this reason, the support box 2 and the cooling and dehumidifying mechanism 3 are introduced in this solution.

[0022] An air inlet 21 is opened on one side of the support box 2, an air outlet 22 is opened on the other side of the support box 2, a cooling and dehumidifying mechanism 3 is installed inside the support box 2, the cooling and dehumidifying mechanism 3 includes a first fan 32 and a dehumidifying chamber 31, the dehumidifying chamber 31 includes a first chamber body 311 and a second chamber body 312, the first chamber body 311 is located inside the second chamber body 312, a plurality of semiconductor refrigeration chips 33 are installed on the side wall of the first chamber body 311, the semiconductor refrigeration chips 33 include a refrigeration end 331 and a heating end 332, the refrigeration end 331 faces the inside of the first chamber body 311, the heating end 332 faces the side wall of the second chamber body 312, a first air duct 34 is arranged between the first fan 32 and the top of the second chamber body 312, a plurality of ventilation holes 35 are arranged at the bottom of the first chamber body 311, one end of the ventilation holes 35 is connected to the first chamber body 311, and the other end of the ventilation holes 35 is connected to the second chamber body 312.

[0023] The air inlet 21 leaves space for air to enter the inside of the support box 2. To reduce the rainwater from entering the support box 2 through the air inlet 21 on a rainy day, a baffle 36 is inclinedly arranged on the outside of the air inlet 21, that is, on the side wall of the support box 2, and the baffle 36 is located at the top of the air inlet 21. The inclined baffle 36 can prevent the rainwater falling from above or obliquely above from directly passing through the air inlet 21 and reaching the inside of the support box 2. However, this design also hinders the air flow speed. For this reason, the first fan 32 is introduced in this solution. The first fan 32 extracts air and transports the air to the second chamber body 312 through the first air duct 34, and then the flowing air reaches the first chamber body 311 through the second chamber body 312 and the ventilation holes 35.

[0024] The semiconductor refrigeration chip 33 is a tool for heat transfer. When an electric current passes through a thermocouple pair formed by connecting an N-type semiconductor material and a P-type semiconductor material, heat transfer will occur between the two ends, and the heat will transfer from one end to the other end, thereby generating a temperature difference to form a cold end and a hot end.

[0025] Utilizing the above characteristics, the cooling end 331 of the thermoelectric cooler 33 is oriented towards the first chamber 311, and the heating end 332 of the thermoelectric cooler 33 is oriented towards the second chamber 312. After power-on, the temperature in the first chamber 311 will gradually decrease, while the temperature in the second chamber 312 will gradually increase. After the first fan 32 sends external air into the second chamber 312, the flowing air will be heated in the second chamber 312. When the heated flowing air passes through the ventilation holes 35 and reaches the first chamber 311, the water vapor carried in the high-temperature air will quickly condense into droplets after entering the low-temperature environment. At the same time, the high-temperature air is cooled into low-temperature and dry air.

[0026] There are several ventilation holes 35 in this solution, and the several ventilation holes 35 are arranged around the outer wall of the first chamber 311. This design enables the air flow entering the first chamber 311 to form a spiral air flow, which will increase the heat exchange area between the air and the cooling end 331, thereby being able to accelerate the air cooling speed and further accelerate the condensation speed of the water vapor in the air.

[0027] To facilitate the entry of low-temperature dry air into the sealed box 1 and cool down each electrical component, several air outlets 11 and several air inlets 12 are provided on the inner wall of the sealed box 1. The air outlets 11 and the air inlets 12 are arranged opposite to each other. A third air duct 13 is provided between the air outlet 11 and the first chamber 311. The air inlet 12 is connected to a fourth air duct 14, and the end of the fourth air duct 14 far from the sealed box 1 is connected to the exhaust port 22.

[0028] The low-temperature dry air is distributed to each air outlet 11 through the third air duct 13. Subsequently, the low-temperature dry air reaches the inside of the sealed box 1 through the air outlet 11. At this time, the low-temperature dry air will exchange heat with the electrical components. Subsequently, the heated air enters the fourth air duct 14 through the air inlet 12 and reaches the outside through the exhaust port 22 along the fourth air duct 14. During this process, the flowing low-temperature dry air will continuously replace the air in the sealed box 1. Therefore, even if the air in the sealed box 1 contains moisture, under the continuous replacement of the low-temperature dry air, the water vapor in the sealed box 1 is continuously discharged, which ensures that the inside of the sealed box 1 is in a dry environment. At the same time, it avoids the problem that the electrical components in the sealed box 1 are damaged due to heat accumulation.

[0029] Since the refrigeration efficiency of the refrigeration end 331 is affected by the heat dissipation efficiency of the heat generation end 332, in order to accelerate the refrigeration efficiency, we need to ensure the heat dissipation efficiency of the heat generation end 332. To this end, the dehumidification chamber 31 further includes a third chamber body 313, the third chamber body 313 is arranged around the second chamber body 312, the heat generation end 332 is connected with a heat pipe 333, the heat pipe 333 extends towards the third chamber body 313, and at least part of the heat pipe 333 is located in the third chamber body 313; a multi-way valve 23 is arranged between the third chamber body 313 and the first blower 32, an air inlet pipe 232 is arranged between the multi-way valve 23 and the first blower 32, one end of the first air pipe 34 is connected with the multi-way valve 23, the other end of the first air pipe 34 is connected with the second chamber body 312, a second air pipe 231 is arranged between the multi-way valve 23 and the top of the third chamber body 313, and an air outlet 314 is formed at the bottom of the third chamber body 313.

[0030] The heat pipe 333 is thermally connected to the heat generation end 332, which increases the heat dissipation area of the heat generation end 332, and thus accelerates the heat dissipation efficiency of the heat generation end 332. The multi-way valve 23 divides the air guided by the first blower 32 into two parts. One part reaches the inside of the sealed box 1 along the path of the first air pipe 34 - the second chamber body 312 - the ventilation hole 35 - the first chamber body 311 - the third air pipe 13 - the air outlet 11; the air outlet 314 in this solution is connected to the outer wall of the support box 2. Therefore, another part of the air will reach the inside of the third chamber body 313 along the second air pipe 231 and then reach the outside through the air outlet 314. During this process, the heat dissipation efficiency is further accelerated by increasing the heat dissipation area of the heat generation end 332 to ensure the refrigeration efficiency of the refrigeration end 331. At the same time, the heat of the heat generation end 332 is recovered to a certain extent, which reduces the overall energy consumption.

[0031] In order to further accelerate the heat dissipation efficiency, the heat pipe 333 is a U-shaped heat pipe 333. A heat conduction sheet 334 is arranged between the middle region of the U-shaped heat pipe 333 and the heat generation end 332. The heat conduction sheet 334 is thermally connected to the U-shaped heat pipe 333, and a heat conduction adhesive 335 is filled between the heat conduction sheet 334 and the heat generation end 332. The heat conduction sheet 334 is a metal sheet with a relatively high heat transfer efficiency, which increases the overall heat dissipation area. In order to increase the heat transfer efficiency between the heat conduction sheet 334 and the heat generation end 332, we need to avoid gaps between the two. For this reason, this solution introduces the heat conduction adhesive 335 to fill the gaps and increase the heat transfer efficiency between the two. The U-shaped heat pipe 333 exchanges heat through its middle region with the heat conduction sheet 334 and then transfers the heat towards both ends, which further accelerates the heat dissipation efficiency.

[0032] To facilitate the close contact between the heat conduction fin 334 and the heat generating end 332, a fixing plate 336 is connected to the outer wall of the U-shaped heat pipe 333. The fixing plate 336 is located inside the third chamber 313. A limiting spring 337 is provided between the fixing plate 336 and the side wall of the second chamber 312. The fixing plate 336 is provided with a first threaded hole 338, and the side wall of the second chamber 312 is provided with a second threaded hole 339 that cooperates with the first threaded hole 338. The first threaded hole 338 and the second threaded hole 339 are connected by a bolt 340. During use, when the bolt 340 is turned, the bolt 340 gradually extends into the second threaded hole 339. During this process, the fixing plate 336 will displace towards the first chamber 311 and compress the limiting spring 337. At the same time, the U-shaped heat pipe 333 and the heat conduction fin 334 on the U-shaped heat pipe 333 will gradually come into close contact with the heat generating end 332.

[0033] It should be noted that the heat conduction fin 334 is thermally connected to the U-shaped heat pipe 333, and a heat conduction adhesive 335 is coated on the end of the heat conduction fin 334 facing the heat generating end 332. As the bolt 340 extends into the second threaded hole 339, the heat conduction fin 334 will gradually be pressed tightly against the heat generating end 332. At this time, the heat conduction adhesive 335 will fill the gap between the two, increasing the thermal contact area between the two.

[0034] In this solution, the limiting spring 337 has multiple functions. One is that the limiting spring 337 limits the U-shaped heat pipe 333 by connecting the fixing plate 336 to the outer wall of the second chamber 312, preventing the U-shaped heat pipe 333 from displacing randomly and leaving enough space for the first chamber 311 to be sent into the second chamber 312. The second is that the limiting spring 337 is thermally connected to the fixing plate 336, which enables the temperature on the U-shaped heat pipe 333 to be transferred to the limiting spring 337, thereby increasing the heat dissipation area of the U-shaped heat pipe 333.

[0035] To facilitate the installation of the semiconductor refrigeration sheet 33, a plurality of fixing holes are provided on the side wall of the first chamber 311. One end of the fixing hole faces the inside of the first chamber 311, and the other end of the fixing hole extends towards the second chamber 312. The semiconductor refrigeration sheet 33 is installed in the fixing hole. A plurality of condensation meshes 37 are provided inside the first chamber 311, and the semiconductor refrigeration sheet 33 is arranged around the condensation meshes 37. The refrigeration end 331 is thermally connected to the condensation meshes 37.

[0036] This design enables the refrigeration end 331 of the semiconductor refrigeration sheet 33 to directly contact the inside of the first chamber 311. The condensation meshes 37 are thermally connected to the refrigeration end 331, which also increases the heat exchange area between the refrigeration end 331 and the flowing air in the first chamber 311, thereby accelerating the cooling speed of the flowing air. At the same time, this also accelerates the condensation speed of the water vapor in the air, and thus accelerates the drying speed of the air.

[0037] To prevent air between the first chamber 311 and the second chamber 312 from flowing directly through the fixing holes, a heat insulation layer is filled between the fixing holes and the side wall of the semiconductor refrigeration sheet 33. The heat insulation layer has two functions. One is to fill the gap and reduce air flow. The other is to fix the semiconductor refrigeration sheet 33.

[0038] The water vapor in the first chamber 311 condenses into droplets on the condensation mesh 37. As the liquid gradually converges, under the influence of gravity, the droplets will fall. To prevent the droplets from converging at the bottom of the first chamber 311 and affecting air flow, a collection groove 3111 is provided at the bottom of the first chamber 311, and a drainage pipe 38 is connected to the bottom of the collection groove 3111. One end of the drainage pipe 38 is connected to the outer wall of the support box 2. At this time, the water in the collection groove 3111 will be discharged to the outside through the drainage pipe 38. For easy control, the drainage pipe 38 can be connected to an electric control valve.

[0039] Embodiment 2: As Figure 6 shown, to further increase the heat dissipation speed of the U-shaped heat pipe 333, a plurality of heat dissipation fins 3331 are provided on the side wall of the U-shaped heat pipe 333. A part of the heat dissipation fins 3331 is located in the second chamber 312, and the other part of the heat dissipation fins 3331 is located in the third chamber 313.

[0040] Embodiment 3: As Figures 7-11 shown, to reduce the probability of dust entering, the cooling and dehumidifying mechanism 3 further includes a filter disc 4. The first blower 32 includes an air inlet hood 322. A suction pipe 321 is provided between the air inlet hood 322 and the first blower 32, and the filter disc 4 covers the air inlet hood 322. The air extracted by the first blower 32 is filtered by the filter disc 4. During this process, the suspended particulate matter carried in the air will be intercepted, which slows down the accumulation speed of the suspended particles in the sealed box 1.

[0041] During the long-term use of the filter disc 4, suspended particles will clog the filter disc 4, which makes the air passing ability of the filter disc 4 worse and slows down the air flow speed. To avoid this situation, the conventional practice is for the staff to regularly replace the filter disc 4. However, the replacement process of the filter disc 4 is rather troublesome. Therefore, a filter chamber 41 is also installed in the support box 2. The filter disc 4 is located in the filter chamber 41. The filter disc 4 includes a support ring 42 and a support shaft 43. The support shaft 43 is located at the center of the support ring 42. A filter screen 44 is arranged between the support ring 42 and the support shaft 43. The filter chamber 41 includes a dust removal area 46 and a cleaning area 47. An isolation strip 45 is arranged between the dust removal area 46 and the cleaning area 47. The air inlet hood 322 covers the dust removal area 46. An isolation bin 5 is installed at the top of the cleaning area 47. A water storage tank 51 is installed in the isolation bin 5. A water spray head 53 and a blowing head 54 are installed between the isolation bin 5 and the cleaning area 47. A micro water pump 52 is installed between the water spray head 53 and the water storage tank 51. The water storage tank 51 and the water spray head 53 are both connected to the micro water pump 52 through pipelines. The water storage tank 51 is connected to one end of the drainage pipeline 38 far from the first bin body 311. The end of the fourth air pipe 14 far from the air extraction port 12 is connected to the blowing head 54.

[0042] The isolation strips 45 in this solution are divided into two groups, with two in each group, and the two isolation strips 45 are symmetrically arranged with respect to the support shaft 43. At this time, the isolation strips 45 divide the isolation chamber into a dust removal area 46 and a cleaning area 47. The function of the dust removal area 46 is to prevent suspended particles in the air from entering the air inlet hood 322, while the function of the cleaning area 47 is to clean the filter screen 44 to a certain extent. Therefore, a water storage tank 51 is introduced in this solution. The water storage tank 51 is used to store the condensed water generated in the first bin body 311. When the condensed water reaches a certain amount, the micro water pump 52 is started to send the condensed water in the water storage tank 51 to the water spray head 53, and then the condensed water is sprayed onto the upper surface of the filter screen 44 through the water spray head 53. During this process, the micro water pump 52 pressurizes the condensed water to make it flow at a high speed. At this time, the condensed water will impact the filter screen 44, thereby cleaning the dust accumulated on the filter screen 44. Due to the blocking of the isolation strips 45, the splashing water droplets and dust during cleaning are difficult to affect the dust removal area 46. After the cleaning is completed, we still need to carry out the drying work. Therefore, the air extraction port 12 sends the air in the sealed box 1 to the blowing head 54 through the fourth pipeline and sends it out towards the filter screen 44 through the blowing head 54. Since the air in the sealed box 1 is heated by the electrical components during the working process, the flowing air with a temperature higher than the room temperature will take away the moisture on the filter screen 44 during the process of passing through the filter screen 44. At the same time, it will impact the filter screen 44 again and take away the remaining part of the dust on the filter screen 44, completing the cleaning work of the filter screen 44.

[0043] To facilitate the collection of the condensed water sprayed by the water spray head 53 and the hot air blown by the hair dryer head 54, a collection bin 6 is provided on the side of the cleaning area 47 away from the isolation bin 5. The top of the collection bin 6 covers the cleaning area 47. The bottom of the collection bin 6 is connected to a separation box 61. A second fan 64 is provided between the separation box 61 and the air outlet 22. A fifth pipe 62 is provided between the separation box 61 and the second fan 64. A sixth pipe 65 is provided between the second fan 64 and the air outlet 22. An outlet pipe 63 is provided between the separation box 61 and the outer wall of the support bin.

[0044] After the condensed water sprayed by the water spray head 53 finishes cleaning the filter screen 44, it reaches the separation box 61 through the collection bin 6 and is then discharged to the outside through the outlet pipe 63. The flowing air will sequentially pass through the filter screen 44 - collection bin 6 - separation box 61 - fifth pipe 62 - second fan 64 - sixth pipe 65 and finally be discharged to the outside. During this process, the flowing air will carry away the liquid droplets remaining on the filter screen 44. Some of the heavier liquid droplets will fall into the separation box 61 and be then discharged through the outlet pipe 63; some of the lighter liquid droplets will be discharged through the air outlet 22 following the flowing air current.

[0045] To facilitate the cleaning of the entire filter screen 44, we need to change the position between the cleaning area 47 and the dust removal area 46. For this purpose, a driving motor 7 is installed on the side wall of the isolation bin 5. An annular groove 72 is provided on the outer wall of the support ring 42. A driving wheel 71 is installed at the power end of the driving motor 7. A driving belt 73 is provided between the driving wheel 71 and the annular groove 72. The driving motor 7 drives the support ring 42 to rotate through the driving belt 73. When the support ring 42 rotates, it will drive the filter screen 44 to rotate, which ensures that all areas of the filter screen 44 can be cleaned.

[0046] To prevent the isolation strip 45 from rotating with the filter screen 44, the isolation strip 45 includes a fixed arm 451 and a rubber strip 452. A bearing sleeve 48 is arranged around the wall of the support shaft 43. One end of the fixed arm 451 is connected to the inner wall of the filter chamber 41, and the other end of the fixed arm 451 is connected to the outer wall of the bearing sleeve 48. The rubber strip 452 contacts the filter net 44. This design makes the isolation sleeve stationary during the rotation of the support shaft 43, thereby preventing the cleaning area 47 from communicating with the dust removal area 46.

[0047] In summary, the advantages of this solution are as follows: First, the sealed box 1 is sealed separately, and the air needs to be dried and cooled by the cooling and dehumidification mechanism 3 before it can be sent into the sealed box 1. This avoids the problem of water vapor entering the distribution cabinet due to direct air convection in the traditional distribution cabinet technology, and then causing a short circuit due to humidity. Second, after the air enters the cooling and dehumidification mechanism 3, it is first heated by the heating end 332 in the second bin 312, and then enters the first bin 311 and is cooled by the cooling end 331 to condense moisture. In this process, the flowing air takes the heat away from the heating end 332, which accelerates the cooling efficiency of the cooling end 331; at the same time, due to the high air temperature, the temperature of the air drops suddenly after entering the first bin 311, which accelerates the condensation rate of water vapor.

[0048] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A waterproof and moisture-proof AC low-voltage power distribution cabinet, characterized in that: It includes a sealed box (1) and a support box (2). The support box (2) is located at the bottom of the sealed box (1). An air inlet (21) is provided on one side of the support box (2), and an air outlet (22) is provided on the other side of the support box (2). A cooling and dehumidifying mechanism (3) is installed in the support box (2). The cooling and dehumidifying mechanism (3) includes a first fan (32) and a dehumidifying chamber (31). The dehumidifying chamber (31) includes a first chamber body (311) and a second chamber body (312). The first chamber body (311) is located inside the second chamber body (312). A number of semiconductor refrigeration chips (33) are installed on the side wall of the first chamber body (311). The semiconductor refrigeration chip (33) includes a refrigeration end (331) and a heating end (332). The refrigeration end (331) faces the inside of the first chamber body (311), and the heating end (332) faces the side wall of the second chamber body (312). A first air duct (34) is provided between the first fan (32) and the top of the second chamber body (312). A number of ventilation holes (35) are provided at the bottom of the first chamber body (311). One end of the ventilation hole (35) is connected to the first chamber body (311), and the other end of the ventilation hole (35) is connected to the second chamber body (312). A number of air outlets (11) and a number of air extraction ports (12) are provided on the inner wall of the sealed box (1). The air outlets (11) and the air extraction ports (12) are arranged opposite to each other. A third air duct (13) is provided between the air outlet (11) and the first chamber body (311). The air extraction port (12) is connected to a fourth air duct (14). The end of the fourth air duct (14) far away from the sealed box (1) is connected to the air outlet (22).

2. The waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 1, characterized in that: The dehumidifying chamber (31) further includes a third chamber body (313). The third chamber body (313) is arranged around the second chamber body (312). The heating end (332) is connected to a heat pipe (333). The heat pipe (333) extends towards the third chamber body (313), and at least part of the heat pipe (333) is located inside the third chamber body (313). A multi-way valve (23) is provided between the third chamber body (313) and the first fan (32). An air inlet pipe (232) is provided between the multi-way valve (23) and the first fan (32). One end of the first air duct (34) is connected to the multi-way valve (23), and the other end of the first air duct (34) is connected to the second chamber body (312). A second air duct (231) is provided between the multi-way valve (23) and the top of the third chamber body (313). An air outlet (314) is provided at the bottom of the third chamber body (313).

3. The waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 2, characterized in that: The heat pipe (333) is a U-shaped heat pipe (333). A heat conducting sheet (334) is provided between the middle region of the U-shaped heat pipe (333) and the heating end (332). The heat conducting sheet (334) is thermally connected to the U-shaped heat pipe (333), and a heat conducting adhesive (335) is filled between the heat conducting sheet (334) and the heating end (332).

4. A waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 3, characterized in that: A fixing plate (336) is connected to the outer wall of the U-shaped heat pipe (333). The fixing plate (336) is located inside the third chamber (313). A limiting spring (337) is arranged between the fixing plate (336) and the side wall of the second chamber (312). A first threaded hole (338) is arranged on the fixing plate (336), and a second threaded hole (339) matching the first threaded hole (338) is arranged on the side wall of the second chamber (312). The first threaded hole (338) and the second threaded hole (339) are connected by a bolt (340).

5. The waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 4, characterized in that: A number of heat dissipation fins (3331) are arranged on the side wall of the U-shaped heat pipe (333). A part of the heat dissipation fins (3331) is located inside the second chamber (312), and another part of the heat dissipation fins (3331) is located inside the third chamber (313).

6. A waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 1, characterized in that: A number of fixing holes are arranged on the side wall of the first chamber (311). One end of the fixing hole faces the inside of the first chamber (311), and the other end of the fixing hole extends towards the second chamber (312). The semiconductor refrigeration sheet (33) is installed in the fixing hole. A number of condensation meshes (37) are arranged inside the first chamber (311). The semiconductor refrigeration sheet (33) is arranged around the condensation meshes (37), and the refrigeration end (331) is thermally connected to the condensation meshes (37).

7. A waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 1, characterized in that: A collection tank (3111) is arranged at the bottom of the first chamber (311), and a drainage pipe (38) is connected to the bottom of the collection tank (3111).

8. A waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 7, characterized in that: The cooling and dehumidifying mechanism (3) further includes a filter disc (4). The first fan (32) includes an air inlet hood (322). A suction pipe (321) is arranged between the air inlet hood (322) and the first fan (32). The filter disc (4) covers the air inlet hood (322).

9. The waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 8, wherein: A filter chamber (41) is further installed inside the support box (2). The filter disc (4) is located in the filter chamber (41). The filter disc (4) includes a support ring (42) and a support shaft (43). The support shaft (43) is located at the center of the support ring (42). A filter screen (44) is arranged between the support ring (42) and the support shaft (43). The filter chamber (41) includes a dust removal area (46) and a cleaning area (47). An isolation strip (45) is arranged between the dust removal area (46) and the cleaning area (47). The air inlet hood (322) covers the dust removal area (46). An isolation bin (5) is installed at the top of the cleaning area (47). A water storage tank (51) is installed inside the isolation bin (5). A water spray head (53) and a blowing head (54) are installed between the isolation bin (5) and the cleaning area (47). A micro water pump (52) is installed between the water spray head (53) and the water storage tank (51). The water storage tank (51) and the water spray head (53) are both connected to the micro water pump (52) through pipes. The water storage tank (51) is connected to one end of the drainage pipe (38) far away from the first chamber (311). The end of the fourth air pipe (14) far away from the air suction port (12) is connected to the blowing head (54).

10. A waterproof and moisture-proof AC low-voltage power distribution cabinet according to claim 9, characterized in that: On one side of the cleaning area (47) away from the isolation bin (5), a collecting bin (6) is provided. The top of the collecting bin (6) covers the cleaning area (47). The bottom of the collecting bin (6) is connected to a separation box (61). A second fan (64) is provided between the separation box (61) and the air outlet (22). A fifth pipe (62) is provided between the separation box (61) and the second fan (64). A sixth pipe (65) is provided between the second fan (64) and the air outlet (22). A water outlet pipe (63) is provided between the separation box (61) and the outer wall of the support bin; A driving motor (7) is installed on the side wall of the isolation bin (5). An annular groove (72) is provided on the outer wall of the support ring (42). The power end of the driving motor (7) is equipped with a driving wheel (71). A driving belt (73) is provided between the driving wheel (71) and the annular groove (72); The isolation strip (45) includes a fixed arm (451) and a rubber strip (452). A bearing sleeve (48) is arranged around the wall of the support shaft (43). One end of the fixed arm (451) is connected to the inner wall of the filter chamber (41). The other end of the fixed arm (451) is connected to the outer wall of the bearing sleeve (48). The rubber strip (452) contacts the filter net (44).

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