Temperature control anti-static distribution box based on PLC control

Abstract

The invention provides a temperature control anti-static distribution box based on PLC control, and relates to the technical field of distribution boxes. The temperature control anti-static distribution box based on PLC control comprises a distribution box body, a PLC controller, a static detector, a grounding rod and a temperature detection structure. The layered heat dissipation design is adopted, dust-free heat dissipation is achieved through the heat dissipation interlayer in daily life, the TEC module is temporarily started for direct blowing refrigeration at the high temperature, the core cooling requirement is met, meanwhile, the dust accumulation problem caused by traditional continuous direct blowing heat dissipation is greatly reduced, and therefore the electrostatic risk is effectively reduced; by means of the negative pressure dust collection and pulse dust removal technology, efficient cleaning of the filter screen is achieved, the problem that dust flows into the filter screen during manual disassembly and maintenance is solved, and the risk of secondary pollution is remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of distribution box technology, specifically to a temperature-controlled anti-static distribution box based on distribution box control. Background Technology

[0002] As the core equipment for power distribution, power distribution cabinets in power systems typically integrate precision electronic components such as circuit breakers and PLC controllers. In industrial automation scenarios, distribution cabinets need to operate for extended periods in high-temperature, high-humidity, or dusty environments. Traditional designs often employ natural or forced air cooling structures, using ventilation holes to exchange air and maintain stable equipment temperatures. However, this open-type cooling solution has significant limitations when dealing with complex environmental conditions.

[0003] In existing technologies, the anti-static and heat dissipation performance of power distribution cabinets is often difficult to balance: on the one hand, forced air cooling systems need to continuously draw in external air, causing dust particles to accumulate inside the equipment; on the other hand, static charges easily adhere to charged dust surfaces, forming local high-voltage discharge zones. Studies have shown that dust accumulation introduced by the heat dissipation structure is a key factor causing static electricity accumulation inside the power distribution cabinet, especially when dust adheres to insulating components or circuit boards, significantly reducing creepage distance and increasing the risk of breakdown. To reduce dust ingress, the conventional solution is to install filters at the air inlet, but in practice, it has been found that standard filters (such as G4 grade pre-filters) can only intercept particles with a diameter >10μm, while electronic components mainly attract micro-dust particles of 0.5-5μm; more importantly, manual filter maintenance requires disassembling the outer casing, at which point a large amount of accumulated dust will rush into the equipment with the airflow in a short time, forming maintenance pollution. A power equipment testing report shows that a single filter cleaning operation can cause the PM2.5 concentration inside the cabinet to exceed the standard by more than 20 times, which actually exacerbates the static electricity risk. This vicious cycle of dust prevention, maintenance, and pollution, together with the technical paradox of conventional distribution boxes being forced to sacrifice anti-static performance to maintain heat dissipation efficiency under high-temperature conditions, or conversely adopting a sealed structure leading to overheating damage, constitutes an industry problem.

[0004] Therefore, it is necessary to comprehensively optimize and improve the anti-static and temperature control structures of the distribution box in order to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a PLC-controlled temperature-controlled anti-static distribution box, which solves the problem that existing PLC-controlled temperature-controlled anti-static distribution boxes often struggle to balance anti-static and heat dissipation performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a PLC-controlled temperature-controlled anti-static distribution box, comprising a distribution box body, a PLC controller, an electrostatic detector, a grounding rod, and a temperature detection structure. An equipment box is located on the lower wall of the distribution box body, and a base is located on the lower wall of the equipment box. The distribution box body consists of an inner shell layer and an outer shell layer located outside the inner shell layer. The inner shell layer and the outer shell layer are fixedly connected by multiple sets of support columns. The temperature detection structure is located inside the inner shell layer. A heat dissipation interlayer is formed between the inner shell layer and the outer shell layer. A first row of air vents, communicating with the interior of the heat dissipation interlayer, is located on the left and right side walls of the outer shell layer near the upper wall. The outer shell layer is located on the side wall above the first row of air vents. A second row of air vents is provided, with an exhaust pipe fixedly connected to the side of the second row of air vents facing the interior of the heat dissipation interlayer. An air inlet window is snapped onto the right wall of the equipment box, with a filter screen fixedly connected to the inner wall of the air inlet window. A dust collection device for periodically cleaning the filter screen is provided on the right wall of the equipment box. The dust collection device includes a movable base, a dust collection hood, and a negative pressure box. A first heat dissipation structure for supplying air to the heat dissipation interlayer is fixedly connected to the upper inner wall of the equipment box. An air inlet communicating with the first heat dissipation structure is provided on the lower wall of the outer shell. An air inlet pipe for supplying air to the interior of the inner shell is fixedly connected to the upper inner wall of the equipment box, located to the left of the first heat dissipation structure. A second heat dissipation structure for providing cold air to cool the interior of the inner shell is provided on the lower inner wall of the equipment box.

[0007] Preferably, the movable seat is slidably connected to the right wall of the equipment box via two sets of slide rails, with the two sets of slide rails located on the upper and lower sides of the air inlet window, respectively. The dust collection hood is slidably connected to the side of the movable seat facing the equipment box via four sets of guide rods. All four sets of guide rods are fixedly connected to the side of the dust collection hood away from the equipment box. The ends of the four guide rods away from the dust collection hood penetrate the inner wall of the movable seat and are slidably connected thereto. A dust collection port is provided on the side of the dust collection hood away from the movable seat, and a sealing layer is provided on the inner wall of the dust collection port. The inner size of the dust collection port is adapted to the outer size of the air inlet window. A connector is fixedly connected to the side of the dust collection hood facing the movable seat. A clearance hole is provided on the inner wall of the movable seat. The end of the connector away from the dust collection hood penetrates the clearance hole and is fixedly connected to a dust collection pipe. The negative pressure box is fixedly connected to the end of the dust collection pipe away from the dust collection hood. A pulse valve is provided on the outer wall of the dust collection pipe. The negative pressure box is equipped with a valve. A fixed plate is fixedly connected inside the negative pressure box, which divides the inside of the negative pressure box into an upper chamber and a lower chamber. The lower chamber forms a sealed space when the cabinet door of the negative pressure box is closed. A negative pressure pump is fixedly connected to the upper wall of the fixed plate near the right side. The suction end of the negative pressure pump passes through the fixed plate and is connected to the interior of the lower chamber. A heat dissipation window is provided on the right wall of the negative pressure box. The interior of the upper chamber is connected to the outer wall of the negative pressure box through the heat dissipation window. A connecting pipe is fixedly connected to the inner wall of the fixed plate to the left of the negative pressure pump. The lower end of the connecting pipe extends into the interior of the lower chamber and is fixedly connected to a dust collection bag by a clamp. The upper end of the connecting pipe extends into the interior of the upper chamber. The end of the suction pipe facing the negative pressure box passes through the right wall of the negative pressure box and is fixedly connected to the upper end of the connecting pipe. A weight detection sensor for monitoring the weight of dust collected in the dust collection bag is fixedly connected to the lower inner wall of the negative pressure box.

[0008] Preferably, a cylinder is fixedly connected to the right wall of the equipment box and between the two sets of slide rails. The cylinder is located in front of the air inlet window. The end of the cylinder's extension shaft is fixedly connected to the front wall of the movable seat. Two sets of electric telescopic rods are fixedly connected to the end of the movable seat away from the equipment box. The extension shaft of the electric telescopic rod passes through the inner wall of the movable seat and is fixedly connected to the side of the dust hood facing the movable seat. The movable seat is driven by the movable seat, and the dust hood is driven by the electric telescopic rods, so that the dust hood is sealed and connected to the air inlet window.

[0009] Preferably, the first heat dissipation structure is a first fan, which is fixedly connected to the upper inner wall of the equipment box. The first fan is positioned corresponding to the air inlet. The first fan is a DC ion fan and includes a housing, a positive discharge needle, a negative discharge needle, and a fan assembly. Each component is connected to the PLC controller through an independent circuit.

[0010] Preferably, the second heat dissipation structure includes a cooling box and multiple TEC modules. The cooling box is fixedly connected to the lower inner wall of the equipment box and close to the left wall of the equipment box. The rear wall of the cooling box abuts against the rear inner wall of the equipment box. The cooling box inlet is located on the front wall of the cooling box and close to the lower wall. The cooling box outlet is located on the upper wall of the cooling box and close to the rear wall. The lower end of the air inlet pipe is fixedly connected to the cooling box outlet. A second fan is fixedly connected to the cooling box inlet. The interior of the cooling box forms an S-shaped airflow channel through multiple partitions. The cross-sectional width of the S-shaped airflow channel is 50-80mm, and the spacing between adjacent partitions (35) is 30-50mm. The multiple TEC modules are respectively fixedly connected to the inner left wall and inner right wall of the S-shaped airflow channel.

[0011] Preferably, both sides of the refrigeration box are fixedly connected to air guide shrouds. The two sets of air guide shrouds are U-shaped with their openings facing each other. The rear end of the air guide shrouds penetrates through the rear wall of the equipment box and communicates with the outside of the equipment box. Multiple sets of third fans are fixedly connected to the inner side wall of the air guide shrouds near the front end. The hot ends of the multiple sets of TEC modules penetrate through the left and right sides of the refrigeration box and extend into the two sets of air guide shrouds respectively. The heat from the hot ends of the TEC modules is blown to the outside of the equipment box by the third fans.

[0012] Preferably, the end of the exhaust pipe away from the second exhaust window penetrates the side wall of the inner shell and extends into the interior of the inner shell, and is 50-100mm away from the top of the inner shell. The upper end of the air inlet pipe penetrates the upper wall of the equipment box, the lower wall of the outer shell, and the lower wall of the inner shell in sequence and extends into the interior of the inner shell.

[0013] Preferably, valve plates are rotatably connected to the inner walls of both the exhaust pipe and the inlet pipe, and motors for driving the valve plates to rotate are provided on the outer walls of both the exhaust pipe and the inlet pipe.

[0014] Preferably, the temperature detection structure includes five sets of temperature sensors, all of which are disposed inside the inner shell and located on the upper inner wall, lower inner wall, left inner wall, right inner wall, and rear inner wall of the inner shell, respectively.

[0015] Preferably, the front wall of the distribution box is provided with a door, the PLC controller and the electrostatic detector are both located on the front wall of the door, and the grounding rod is electrically connected to the distribution box through a wire.

[0016] This invention provides a temperature-controlled anti-static distribution box based on PLC control. It has the following beneficial effects:

[0017] 1. Compared with existing technologies, this PLC-controlled temperature-controlled anti-static distribution box adopts a layered heat dissipation design. Normally, it achieves dust-free heat dissipation through the heat dissipation interlayer. When the temperature is high, the TEC module is briefly activated for direct cooling. While ensuring the core cooling needs, it greatly reduces the dust accumulation problem caused by traditional continuous direct cooling, thereby effectively reducing the risk of static electricity.

[0018] 2. Compared with existing technologies, this PLC-controlled temperature-controlled anti-static distribution box uses a vacuuming device that combines a negative pressure pump and a dust collection hood under PLC control. By utilizing negative pressure vacuuming and pulse cleaning technology, it achieves efficient cleaning of the filter screen, avoids the problem of dust entering during manual disassembly and maintenance, and significantly reduces the risk of secondary pollution. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the connection structure between the inner shell layer, the outer shell layer, and the exhaust pipe of the present invention;

[0021] Figure 3 This is a schematic diagram of the connection structure of the exhaust pipe, motor, and valve plate of the present invention;

[0022] Figure 4 This is a schematic diagram of the connection structure between the movable seat and the dust collection cover of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection structure between the dust collection hood and the sealing layer of the present invention;

[0024] Figure 6 This is a partial cross-sectional view of the connection structure between the inner shell layer, outer shell layer, and equipment box of the present invention;

[0025] Figure 7 This is a partial sectional view of the internal structure of the equipment box of the present invention;

[0026] Figure 8 This is a side sectional view of the internal structure of the refrigeration box of the present invention;

[0027] Figure 9 This is a cross-sectional schematic diagram of the internal structure of the negative pressure box of the present invention.

[0028] The components include: 1. Base; 2. Equipment box; 3. Power distribution box; 301. Inner shell; 302. Outer shell; 4. Door; 5. Static electricity detector; 6. PLC controller; 7. Air inlet; 8. Filter screen; 9. Slide rail; 10. Movable seat; 11. Cylinder; 12. Negative pressure box; 13. Heat dissipation window; 14. Dust suction pipe; 15. First exhaust window; 16. Second exhaust window; 17. Support column; 18. Exhaust pipe; 19. Motor; 20. Valve plate; 21. 1. Electric telescopic pole; 22. Dust hood; 23. Guide rod; 24. Connector; 25. Pulse valve; 26. Sealing layer; 27. Air inlet pipe; 28. Air inlet; 29. ​​First fan; 30. Temperature sensor; 31. Refrigeration box; 32. Second fan; 33. Air guide cover; 34. Third fan; 35. Partition; 36. TEC module; 37. Fixing plate; 38. Connecting pipe; 39. Dust collection bag; 40. Negative pressure pump; 41. Weight detection sensor. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example:

[0031] like Figures 1 to 9 As shown, this embodiment of the invention provides a temperature-controlled anti-static distribution box based on PLC control, including a distribution box body 3, a PLC controller 6, an electrostatic detector 5, a grounding rod, and a temperature detection structure. An equipment box 2 is provided on the lower wall of the distribution box body 3, and a base 1 is provided on the lower wall of the equipment box 2. A door 4 is provided on the front wall of the distribution box body 3. The PLC controller 6 and the electrostatic detector 5 are both located on the front wall of the door 4. The grounding rod is electrically connected to the distribution box body 3 through a wire.

[0032] To achieve the dual goals of dust-free heat dissipation and rapid cooling, the housing of the distribution box 3 consists of an inner shell layer 301 and an outer shell layer 302 located outside the inner shell layer 301. The inner shell layer 301 and the outer shell layer 302 are fixedly connected by multiple sets of support columns 17, forming a heat dissipation interlayer between the inner shell layer 301 and the outer shell layer 302. The left and right side walls of the outer shell layer 302, near the upper wall, are provided with a first row of air windows 15 that communicate with the interior of the heat dissipation interlayer. The upper inner wall of the equipment box 2 is fixedly connected to a first heat dissipation structure for supplying air to the heat dissipation interlayer. The lower wall of the outer shell layer 302 is provided with an air inlet 28 that communicates with the first heat dissipation structure. The first heat dissipation structure is a first fan 29, which is fixedly connected to the upper inner wall of the equipment box 2. The position of the first fan 29 corresponds to that of the air inlet 28. The first fan 29 is a DC ion fan. The first fan 29 includes a housing, a positive discharge needle, a negative discharge needle, and a fan assembly. Each component is connected to the PLC controller 6 through an independent circuit.

[0033] During normal operation, the first fan 29 drives external air to enter the heat dissipation interlayer through the air inlet 28, forming an airflow circulation from bottom to top. The interlayer space is used to isolate dust and electrical components, while ion discharge neutralizes the static electricity of the cabinet.

[0034] In order to achieve accurate multidimensional temperature monitoring, the temperature detection structure is set inside the inner shell 301. The temperature detection structure includes five sets of temperature sensors 30. All five sets of temperature sensors 30 are set inside the inner shell 301 and are respectively located on the upper inner wall, lower inner wall, left inner wall, right inner wall and rear inner wall of the inner shell 301.

[0035] Five sets of temperature sensors 30 monitor the temperature data of various parts of the cabinet in real time. When the temperature at any point exceeds the preset safety value, the PLC controller 6 automatically starts the graded heat dissipation strategy, giving priority to natural heat dissipation through the heat dissipation layer. If this is ineffective, it switches to the TEC module 36 for forced cooling to avoid local overheating and equipment failure.

[0036] To enable cleaning of the filter 8 without disassembly, an air inlet 7 is snapped onto the right wall of the equipment box 2. The filter 8 is fixedly connected to the inner wall of the air inlet 7. A vacuuming device for periodically cleaning the filter 8 is installed on the right wall of the equipment box 2. The vacuuming device includes a movable base 10, a vacuum hood 22, and a negative pressure box 12. The movable base 10 is slidably connected to the right wall of the equipment box 2 via two sets of slide rails 9, which are located on the upper and lower sides of the air inlet 7, respectively. The vacuum hood 22 is slidably connected to the movable base 10 facing the equipment box via four sets of guide rods 23. On one side of box 2, four sets of guide rods 23 are fixedly connected to the side of dust hood 22 away from equipment box 2. The ends of the four sets of guide rods 23 away from dust hood 22 all penetrate the inner wall of movable seat 10 and are slidably connected thereto. A dust suction port is provided on the side of dust hood 22 away from movable seat 10. A sealing layer 26 is provided on the inner wall of the dust suction port. The inner cavity size of the dust suction port is adapted to the outer size of the air inlet window 7. A connector 24 is fixedly connected on the side of dust hood 22 facing movable seat 10. A clearance hole is provided on the inner wall of movable seat 10.

[0037] The PLC controller 6 periodically drives the cylinder 11 to push the movable seat 10 along the slide rail 9, so that the dust hood 22 is aligned with the air inlet window 7. The electric telescopic rod 21 drives the dust hood 22 to press the filter screen 8 to form a sealed space. The sealing layer 26 ensures that no dust leaks out when vacuuming under negative pressure, thus completely solving the problem of secondary pollution caused by traditional manual disassembly and maintenance.

[0038] To improve the cleaning effect of the filter 8, the end of the connector 24 away from the dust cover 22 passes through the clearance hole and is fixedly connected to the suction pipe 14. The negative pressure box 12 is fixedly connected to the end of the suction pipe 14 away from the dust cover 22. A pulse valve 25 is provided on the outer wall of the suction pipe 14. A fixing plate 37 is fixedly connected inside the negative pressure box 12. The inside of the negative pressure box 12 is divided into an upper chamber and a lower chamber by the fixing plate 37. The lower chamber forms a sealed space after the cabinet door of the negative pressure box 12 is closed. A negative pressure pump 40 is fixedly connected to the upper wall of the fixing plate 37 near the right side. The suction end of the negative pressure pump 40 passes through the fixing plate 37 and is connected to the lower chamber. A heat dissipation window 13 is provided on the right wall of the negative pressure box 12. The upper chamber is connected to the outer wall of the negative pressure box 12 through the heat dissipation window 13. A connecting pipe 38 is fixedly connected to the inner wall of the fixing plate 37 to the left of the negative pressure pump 40. The lower end of the connecting pipe 38 extends into the lower chamber and is connected to the lower chamber. A dust collection bag 39 is fixedly connected by a clamp. The upper end of the connecting pipe 38 extends into the upper chamber. The end of the suction pipe 14 facing the negative pressure box 12 passes through the right wall of the negative pressure box 12 and is fixedly connected to the upper end of the connecting pipe 38. A weight detection sensor 41 for monitoring the weight of dust collected by the dust collection bag 39 is fixedly connected to the lower inner wall of the negative pressure box 12. A cylinder 11 is fixedly connected to the right wall of the equipment box 2 and between two sets of slide rails 9. The cylinder 11 is located in front of the air inlet window 7. The end of the cylinder 11's extension shaft is fixedly connected to the front wall of the movable seat 10. Two sets of electric telescopic rods 21 are fixedly connected to the end of the movable seat 10 away from the equipment box 2. The extension shaft of the electric telescopic rod 21 passes through the inner wall of the movable seat 10 and is fixedly connected to the side of the dust hood 22 facing the movable seat 10. The movable seat 10 is driven by the movable seat 10, and the dust hood 22 is driven by the electric telescopic rods 21, so that the dust hood 22 is sealed and connected to the air inlet window 7.

[0039] The negative pressure pump 40 generates negative pressure to draw dust into the dust collection bag 39 through the suction pipe 14. The pulse valve 25 periodically generates airflow pulses to vibrate the filter screen 8, causing deep dust to fall off the surface of the filter screen 8. The weight detection sensor 41 monitors the amount of dust collected in real time and feeds it back to the PLC controller 6 to realize intelligent dust removal management.

[0040] To achieve efficient cooling and heat dissipation, a second air vent 16 is provided on the side wall of the outer shell 302 above the first air vent 15. An exhaust pipe 18 is fixedly connected to the side of the second air vent 16 facing the interior of the heat dissipation interlayer. An air inlet pipe 27 for supplying air to the interior of the shell 301 is fixedly connected to the upper inner wall of the equipment box 2 to the left of the first heat dissipation structure. A second heat dissipation structure for providing cold air to cool the interior of the inner shell 301 is provided on the lower inner wall of the equipment box 2. The second heat dissipation structure includes a cooling box 31 and multiple TEC modules 36. The cooling box 31 is fixedly connected to the lower inner wall of the equipment box 2 and close to the equipment box. 2. The left wall of the refrigeration box 31 and the rear wall of the equipment box 2 are in contact with each other. The inlet of the refrigeration box 31 is located on the front wall of the refrigeration box 31 and near the lower wall. The outlet of the refrigeration box 31 is located on the upper wall of the refrigeration box 31 and near the rear wall. The lower end of the air inlet pipe 27 is fixedly connected to the outlet of the refrigeration box 31. A second fan 32 is fixedly connected to the inlet of the refrigeration box 31. The interior of the refrigeration box 31 forms an S-shaped airflow channel through multiple sets of partitions 35. The cross-sectional width of the S-shaped airflow channel is 50-80mm. The spacing between adjacent partitions 35 is 30-50mm. Multiple sets of TEC modules 36 are fixedly connected to the inner left wall and inner right wall of the S-shaped airflow channel respectively.

[0041] The second fan 32 introduces external air into the S-shaped airflow channel. The cold end of the TEC module 36 rapidly cools the airflow. The cold air is delivered to the interior of the inner shell 301 through the air inlet pipe 27. The heat generated at the hot end is discharged through the guide shroud 33. The S-shaped channel design extends the contact time between the airflow and the cooling module, significantly improving the cooling efficiency.

[0042] To optimize the heat dissipation path, guide shrouds 33 are fixedly connected to both the left and right side walls of the refrigeration box 31. The two sets of guide shrouds 33 are U-shaped with their openings facing each other. The rear end of the guide shrouds 33 penetrates the rear wall of the equipment box 2 and communicates with the outside of the equipment box 2. Multiple sets of third fans 34 are fixedly connected to the inner side wall of the guide shrouds 33 and near the front end. The hot ends of multiple sets of TEC modules 36 penetrate the left and right side walls of the refrigeration box 31 and extend into the two sets of guide shrouds 33 respectively. The heat from the hot ends of the TEC modules 36 is blown to the outside of the equipment box 2 by the third fans 34.

[0043] The third fan 34 forces the heat generated by the hot end of the TEC module 36 out of the enclosure. The U-shaped air guide shroud 33 forms a directional airflow channel to prevent hot air backflow from affecting cooling efficiency, while also reducing the internal ambient temperature of the equipment enclosure 2.

[0044] In order to precisely control the airflow path, the end of the exhaust pipe 18 away from the second exhaust window 16 passes through the side wall of the inner shell 301 and extends into the interior of the inner shell 301, and is 50-100mm away from the top of the inner shell 301. The upper end of the air inlet pipe 27 passes through the upper wall of the equipment box 2, the lower wall of the outer shell 302, and the lower wall of the inner shell 301 in sequence and extends into the interior of the inner shell 301.

[0045] The air inlet duct 27 sends cold air into the inner shell 301 from the bottom, and the air outlet duct 18 discharges hot air from the top, forming a bottom-up convection to ensure that the cold air preferentially cools electrical components with high heat generation, while avoiding airflow short circuit.

[0046] In order to achieve intelligent switching of airflow channels, valve plates 20 are rotatably connected to the inner walls of exhaust pipe 18 and air inlet pipe 27, and motors 19 for driving the valve plates 20 to rotate are provided on the outer walls of exhaust pipe 18 and air inlet pipe 27.

[0047] The PLC controller 6 controls the motor 19 to rotate the valve plate 20 based on the data from the temperature sensor 30. In natural cooling mode, the air inlet pipe 27 and the air outlet pipe 18 are closed to prevent gas and dust from entering. In forced cooling mode, the air outlet pipe 18 and the air inlet pipe 27 are opened to ensure that the airflow path is strictly matched with the heat dissipation requirements.

[0048] Working principle: Working principle of the heat dissipation system

[0049] Dust-free cooling mode

[0050] The first fan 29 (DC ion fan) introduces external air into the heat dissipation interlayer through the air inlet 28, and the airflow is discharged through the first exhaust window 15. The positive and negative discharge needles ionize the air, neutralizing the static electricity of the enclosure, while the interlayer space isolates the inner shell 301 from external dust.

[0051] Forced cooling mode

[0052] When the temperature sensor 30 detects that the temperature of the inner shell 301 exceeds the threshold, the PLC controller 6 opens the valve plate 20 and starts the TEC module 36. The second fan 32 introduces air into the S-shaped airflow channel of the refrigeration box 31, and the cold air blows directly into the interior of the inner shell 301 through the air inlet pipe 27. The heat from the hot end is discharged by the third fan 34 through the guide shroud 33.

[0053] Dust prevention and maintenance working principle

[0054] Automatic dust removal process

[0055] The PLC controller 6 periodically drives the cylinder 11 to push the movable seat 10 along the slide rail 9, so that the dust suction hood 22 is aligned with the air inlet window 7. The electric telescopic rod 21 presses the sealing layer 26 to form a negative pressure chamber. The negative pressure pump 40 draws dust from the surface of the filter screen 8 through the dust suction pipe 14, and the pulse valve 25 generates airflow pulses to vibrate the filter screen 8.

[0056] Dust collection management

[0057] Dust enters the dust collection bag 39 through the connecting pipe 38, and the weight detection sensor 41 monitors the dust collection amount in real time. When the preset value is reached, the PLC controller 6 triggers a maintenance alarm to avoid secondary pollution caused by manual disassembly.

[0058] Temperature control principle

[0059] Five sets of temperature sensors 30 monitor the temperature data of the inner shell 301 in real time from all directions, and the PLC controller 6 provides graded control according to preset thresholds:

[0060] Normal temperature: 29°C with only the first fan on for natural cooling;

[0061] Medium to high temperature: Open valve plate 20 to start TEC module 36 for cooling;

[0062] Extremely high temperature: Simultaneously activate the third fan 34 to enhance heat dissipation at the hot end;

[0063] Electrostatic protection principle

[0064] The DC ion fan continuously releases positive and negative ions to neutralize the static electricity in the chamber.

[0065] The grounding rod conducts the residual charge into the earth;

[0066] The electrostatic detector 5 monitors the potential of the enclosure in real time, and triggers an alarm on the PLC controller 6 when an abnormality occurs.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temperature-controlled anti-static distribution box based on PLC control, characterized in that: The system includes a distribution box (3), a PLC controller (6), an electrostatic detector (5), a grounding rod, and a temperature detection structure. The lower wall of the distribution box (3) is equipped with an equipment box (2), and the lower wall of the equipment box (2) is equipped with a base (1). The housing of the distribution box (3) consists of an inner shell layer (301) and an outer shell layer (302) located outside the inner shell layer (301). The inner shell layer (301) and the outer shell layer (302) are fixedly connected by multiple sets of support columns (17). The temperature detection structure is located inside the inner shell layer (301). A heat dissipation interlayer is formed between the inner shell layer (301) and the outer shell layer (302). The left and right side walls of the outer shell layer (302), near the upper wall, are each provided with a first row of air vents (15) that communicate with the interior of the heat dissipation interlayer. A second row of air vents (16) is provided on the side wall of the outer shell layer (302) above the first row of air vents (15). The second row of air vents (16) is fixedly connected to an exhaust pipe (18) on the side facing the interior of the heat dissipation interlayer. An air inlet window (7) is snapped onto the right wall of the equipment box (2). A filter screen (8) is fixedly connected to the inner wall of the air inlet window (7). A dust collection device for regularly cleaning the filter screen (8) is provided on the right wall of the equipment box (2). The dust collection device includes a movable seat (10), a dust collection hood (22), and a negative pressure box (12). A first heat dissipation structure for supplying air to the heat dissipation interlayer of the equipment box (2) is fixedly connected to the upper inner wall of the equipment box (2). An air inlet (28) communicating with the first heat dissipation structure is provided on the lower wall of the outer shell layer (302). An air inlet pipe (27) for supplying air to the interior of the inner shell layer (301) is fixedly connected to the upper inner wall of the equipment box (2) and located to the left of the first heat dissipation structure. A second heat dissipation structure for providing cold air to cool the interior of the inner shell layer (301) is provided on the lower inner wall of the equipment box (2).

2. The temperature-controlled anti-static distribution box based on PLC control according to claim 1, characterized in that: The movable seat (10) is slidably connected to the right wall of the equipment box (2) via two sets of slide rails (9). The two sets of slide rails (9) are located on the upper and lower sides of the air inlet window (7), respectively. The dust hood (22) is slidably connected to the side of the movable seat (10) facing the equipment box (2) via four sets of guide rods (23). The four sets of guide rods (23) are all fixedly connected to the side of the dust hood (22) away from the equipment box (2). The ends of the four sets of guide rods (23) away from the dust hood (22) all penetrate the inner wall of the movable seat (10) and are slidably connected to it. The dust hood (22) is away from the movable seat (10) A suction port is provided on one side of the 10), and a sealing layer (26) is provided on the inner wall of the suction port. The inner cavity size of the suction port is adapted to the outer size of the air inlet window (7). A connector (24) is fixedly connected to the side of the suction hood (22) facing the movable seat (10). A clearance hole is provided on the inner wall of the movable seat (10). The end of the connector (24) away from the suction hood (22) passes through the clearance hole and is fixedly connected to the suction pipe (14). The negative pressure box (12) is fixedly connected to the end of the suction pipe (14) away from the suction hood (22). A pulse is provided on the outer wall of the suction pipe (14). A flush valve (25) is provided. A fixed plate (37) is fixedly connected inside the negative pressure box (12). The negative pressure box (12) is divided into an upper chamber and a lower chamber by the fixed plate (37). The lower chamber forms a sealed space after the cabinet door of the negative pressure box (12) is closed. A negative pressure pump (40) is fixedly connected to the upper wall of the fixed plate (37) near the right side. The suction end of the negative pressure pump (40) passes through the fixed plate (37) and is connected to the lower chamber. A heat dissipation window (13) is provided on the right wall of the negative pressure box (12). The upper chamber is connected to the negative pressure box (12) by the heat dissipation window (13). 2) The outer wall is open, and the inner wall of the fixed plate (37) and the left side of the negative pressure pump (40) are fixedly connected to the connecting pipe (38). The lower end of the connecting pipe (38) extends into the lower chamber and is fixedly connected to the dust collection bag (39) by a clamp. The upper end of the connecting pipe (38) extends into the upper chamber. The end of the suction pipe (14) facing the negative pressure box (12) passes through the right wall of the negative pressure box (12) and is fixedly connected to the upper end of the connecting pipe (38). The lower inner wall of the negative pressure box (12) is fixedly connected to a weight detection sensor (41) for monitoring the weight of dust collected by the dust collection bag (39).

3. A temperature-controlled anti-static distribution box based on PLC control according to claim 2, characterized in that: A cylinder (11) is fixedly connected to the right wall of the equipment box (2) between two sets of slide rails (9). The cylinder (11) is located in front of the air inlet window (7). The end of the cylinder (11) is fixedly connected to the front wall of the movable seat (10). Two sets of electric telescopic rods (21) are fixedly connected to the end of the movable seat (10) away from the equipment box (2). The extension shaft of the electric telescopic rod (21) passes through the inner wall of the movable seat (10) and is fixedly connected to the side of the dust hood (22) facing the movable seat (10). The movable seat (10) is driven by the movable seat (10), and the dust hood (22) is driven by the electric telescopic rod (21), so that the dust hood (22) is sealed and connected to the air inlet window (7).

4. A temperature-controlled anti-static distribution box based on PLC control according to claim 3, characterized in that: The first heat dissipation structure is a first fan (29). The first fan (29) is fixedly connected to the upper inner wall of the equipment box (2). The first fan (29) corresponds to the air inlet (28). The first fan (29) is a DC ion fan. The first fan (29) includes a housing, a positive discharge needle, a negative discharge needle and a fan assembly. Each component is connected to the PLC controller (6) through an independent circuit.

5. A temperature-controlled anti-static distribution box based on PLC control according to claim 4, characterized in that: The second heat dissipation structure includes a cooling box (31) and multiple TEC modules (36). The cooling box (31) is fixedly connected to the lower inner wall of the equipment box (2) and close to the left wall of the equipment box (2). The rear wall of the cooling box (31) abuts against the rear inner wall of the equipment box (2). The inlet of the cooling box (31) is located on the front wall of the cooling box (31) and close to the lower wall. The outlet of the cooling box (31) is located on the upper wall of the cooling box (31) and close to the rear wall. The lower end of the air inlet pipe (27) is fixedly connected to the outlet of the cooling box (31). A second fan (32) is fixedly connected to the inlet of the cooling box (31). The interior of the cooling box (31) forms an S-shaped airflow channel through multiple partitions (35). The cross-sectional width of the S-shaped airflow channel is 50-80mm, and the spacing between adjacent partitions (35) is 30-50mm. The multiple TEC modules (36) are fixedly connected to the inner left wall and inner right wall of the S-shaped airflow channel, respectively.

6. A temperature-controlled anti-static distribution box based on PLC control according to claim 5, characterized in that: The left and right side walls of the refrigeration box (31) are fixedly connected with flow guides (33). The two sets of flow guides (33) are in the shape of a U with their openings facing each other. The rear end of the flow guide (33) penetrates the rear wall of the equipment box (2) and communicates with the outside of the equipment box (2). Multiple sets of third fans (34) are fixedly connected to the inner side wall of the flow guide (33) and near the front end. The hot ends of the multiple sets of TEC modules (36) penetrate the left and right side walls of the refrigeration box (31) and extend into the two sets of flow guides (33). The heat from the hot ends of the TEC modules (36) is blown to the outside of the equipment box (2) by the third fans (34).

7. A temperature-controlled anti-static distribution box based on PLC control according to claim 6, characterized in that: The end of the exhaust pipe (18) away from the second exhaust window (16) passes through the side wall of the inner shell (301) and extends into the interior of the inner shell (301), and is 50-100mm away from the top of the inner shell (301). The upper end of the air inlet pipe (27) passes through the upper wall of the equipment box (2), the lower wall of the outer shell (302), and the lower wall of the inner shell (301) in sequence and extends into the interior of the inner shell (301).

8. A temperature-controlled anti-static distribution box based on PLC control according to claim 7, characterized in that: The inner walls of the exhaust pipe (18) and the air inlet pipe (27) are rotatably connected to valve plates (20), and the outer walls of the exhaust pipe (18) and the air inlet pipe (27) are provided with motors (19) for driving the valve plates (20) to rotate.

9. A temperature-controlled anti-static distribution box based on PLC control according to claim 8, characterized in that: The temperature detection structure includes five sets of temperature sensors (30), all of which are located inside the inner shell (301) and are respectively located on the upper inner wall, lower inner wall, left inner wall, right inner wall and rear inner wall of the inner shell (301).

10. A temperature-controlled anti-static distribution box based on PLC control according to claim 9, characterized in that: The front wall of the distribution box (3) is provided with a door (4), and the PLC controller (6) and the electrostatic detector (5) are both located on the front wall of the door (4). The grounding rod is electrically connected to the distribution box (3) through a wire.

Images