Variable frequency cabinet with protection function

Abstract

The application discloses a frequency conversion cabinet with a protection function, and relates to the technical field of parts of conversion devices. The frequency conversion cabinet with the protection function comprises a converter cabinet shell, a cabinet door rotatably installed on the converter cabinet shell, a heat dissipation plate fixedly installed in the converter cabinet shell, a humidity sensor and a temperature sensor arranged in the converter cabinet shell, and an opening adjusting mechanism installed on the converter cabinet shell. When the environmental humidity is low, the heat dissipation opening is moderately opened, good ventilation and heat dissipation are ensured, the parts of the conversion device are prevented from being aged or malfunctioned due to high temperature, and the working efficiency of internal inversion of the equipment is further optimized. When the humidity is high, the opening degree is automatically reduced, the humid air and condensation are reduced from entering the cabinet, the circuit board is prevented from being damp and short-circuited, insulation is prevented from being reduced, and the rusting and electric leakage risks of the parts of the internal conversion device are reduced.

Description

Technical Field

[0001] This invention relates to the field of components technology for conversion devices, specifically to a frequency converter cabinet with protective functions. Background Technology

[0002] As a core supporting equipment for speed regulation and energy-saving control of industrial motors, frequency converter cabinets are widely used in various industrial scenarios such as metallurgy, chemical industry, sewage treatment, mining and outdoor pumping stations. They rely on frequency converters to achieve stepless speed regulation and soft start control of motors, effectively reducing equipment energy consumption and operational impact.

[0003] Existing traditional frequency converter cabinets have limited electrical protection functions, generally lacking multiple protections such as phase loss, overvoltage and undervoltage, surge protection, lightning protection, leakage protection, and module overheating protection. Faced with power grid fluctuations, locked loads, and lightning strikes, they are highly susceptible to power device breakdown and motor burnout. Furthermore, the electromagnetic harmonics generated during frequency conversion are not effectively suppressed, easily interfering with surrounding automated control equipment, causing communication abnormalities, equipment malfunctions, and poor operational stability.

[0004] In terms of physical protection, traditional converter cabinets cannot simultaneously meet the needs of heat dissipation and protection. Ventilation structures are prone to dust and moisture ingress, while sealed structures are prone to overheating. Humidity, salt spray, and corrosive gases can easily cause component corrosion, insulation degradation, and short circuits due to condensation inside the cabinet, significantly shortening the equipment's lifespan. At the same time, conventional converter cabinets lack targeted structures such as anti-electric shock interlocks, seismic reinforcement, and explosion-proof seals, posing significant safety hazards during operation and maintenance. They are also unsuitable for special high-risk operating conditions such as outdoor environments, high corrosion, flammable and explosive environments, and strong vibrations. As industrial safety regulations and protection level standards continue to improve, the requirements for the safety, stability, and environmental adaptability of frequency converter equipment under complex operating conditions are constantly increasing. Existing ordinary frequency converter cabinets have prominent protection shortcomings, resulting in high failure downtime rates and significant safety risks. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a frequency converter cabinet with protective functions, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a frequency converter cabinet with protective function, including a converter cabinet shell, a cabinet door rotatably installed on the converter cabinet shell, a heat sink fixedly installed inside the converter cabinet shell, a humidity sensor and a temperature sensor installed inside the converter cabinet shell, and the frequency converter cabinet with protective function further includes an opening adjustment mechanism installed on the converter cabinet shell and a cleaning mechanism installed on the heat sink. Preferably, the opening adjustment mechanism includes a mounting frame installed on the converter cabinet, a hinge plate installed inside the mounting frame, gears installed on both sides of the hinge plate, a motor installed inside the converter cabinet, a threaded rod fixedly installed on the output end of the motor, a sliding rod installed on the threaded rod, a rack installed on the sliding rod, and a limiting rod installed inside the converter cabinet. The gear meshes with the rack, the rack is slidably embedded in the interior of the converter cabinet, the output end of the motor rotatably penetrates the interior of the converter cabinet, the threaded rod is rotatably connected to the interior of the converter cabinet, the interior of the sliding rod contacts the outer wall of the limiting rod, and the motor is connected to a humidity sensor for controlling the size of the heat dissipation opening of the heat sink.

[0007] Preferably, the cleaning mechanism includes a movable plate mounted on the threaded rod, a rotating rod mounted inside the movable plate, a brush mounted on the rotating rod, and a rubber wheel mounted on the rotating rod, for cleaning the heat sink.

[0008] Preferably, the interior of the movable plate contacts the outer wall of the limiting rod, the movable plate contacts the interior of the converter cabinet, the outer wall of the rubber wheel contacts the outer wall of the heat sink, and the brush cylinder contacts the outer wall of the heat sink.

[0009] Preferably, the frequency converter cabinet with protective function further includes a protective mechanism installed on the converter cabinet shell for extending protection during maintenance or overheating. The protective mechanism includes an explosion-proof motor mounted on the converter cabinet, a threaded rod II mounted on the output end of the explosion-proof motor, a movable rod mounted on the threaded rod II, a sliding plate mounted on the movable rod, a take-up drum mounted on the converter cabinet, a protective strip mounted on the take-up end of the take-up drum, and a limiting rod II mounted on the converter cabinet. The interior of the sliding plate contacts the outer wall of the limiting rod II. The side of the protective strip away from the take-up drum is fixedly connected to the sliding plate. The output end of the explosion-proof motor rotatably penetrates the outer wall of the converter cabinet. The threaded rod II is rotatably connected to the outer wall of the converter cabinet. The explosion-proof motor is connected to a humidity sensor and a temperature sensor.

[0010] Preferably, the inverter cabinet with protective function further includes a tapping mechanism installed on the movable plate for shaking off dust from the heat sink plate; The striking mechanism includes a connecting shell mounted on the movable plate, a movable column mounted on the connecting shell, a striking block mounted on the movable column, and a trapezoidal block mounted on the heat sink.

[0011] Preferably, a spring is provided between the connecting shell and the moving column, the striking end of the striking block contacts the outer wall of the heat sink, and an inclined surface is provided on the trapezoidal block.

[0012] Preferably, the frequency converter cabinet with protective function further includes an auxiliary mechanism installed on the sliding plate to prevent rainwater from entering the heat dissipation plate; The auxiliary mechanism includes an extension rod mounted on the sliding plate, a positioning block mounted on the converter cabinet, a spiral rod mounted inside the positioning block, and a baffle plate mounted on the spiral rod. The extension rod contacts the outer wall of the converter cabinet, and a movable block is provided inside the extension rod. A spiral groove is formed on the outer wall of the spiral rod, and the movable block is slidably embedded in the spiral groove. The extension rod contacts the outer wall of the limiting rod, and the baffle plate contacts the inside of the extension rod and the outer wall of the converter cabinet.

[0013] Preferably, the frequency converter cabinet with protective function further includes a damping mechanism installed on the shield to prevent the shield from loosening during operation; The damping mechanism includes a pull rod mounted on the baffle plate, a hinge block mounted on the pull rod, an elastic telescopic rod mounted on the hinge block, a pulley mounted on the elastic telescopic end of the elastic telescopic rod, a damping block mounted on the converter cabinet, and a limiting frame mounted on the converter cabinet.

[0014] Preferably, the hinge block contacts the interior of the limiting frame, and the elastic telescopic rod contacts the outer wall of the converter cabinet.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, when the converter cabinet is in operation, the motor drives the threaded rod to rotate, which in turn drives the rack to move. The rack then drives the hinge plate to rotate, controlling the size of the heat dissipation vents. This significantly improves equipment reliability. When the ambient humidity is low, the heat dissipation vents open appropriately to ensure good ventilation and heat dissipation, preventing the components of the converter from aging or malfunctioning due to high temperatures. This further optimizes the working efficiency of the inverter inside the equipment. When the humidity is high, the opening automatically decreases to reduce the entry of humid air and condensation into the cabinet, preventing the circuit boards from getting damp and short-circuiting, and reducing insulation degradation. At the same time, it can meet the requirements for dust prevention and corrosion prevention, reducing the intrusion of dust and corrosive gases, and lowering the risk of corrosion and leakage of the internal converter components. When the hinge plate opens and closes, the threaded rod drives the moving plate to move. The moving plate drives the brush to clean the outer wall of the heat dissipation plate, effectively removing attached dust, lint, and oil, ensuring unobstructed heat dissipation channels and normal heat exchange efficiency. This prevents heat accumulation that could cause the core components of the frequency converter to overheat. Timely cleaning can prevent the equipment from triggering high-temperature protection, automatic frequency reduction, or even unexpected shutdown due to overheating, and improves the insulation performance of the components of the converter inside the converter cabinet.

[0016] 2. In this invention, during rainy or sunny weather, the explosion-proof motor drives the threaded rod two to rotate, which in turn extends the protective strip on the sliding plate. This significantly improves the rain protection capability of the frequency converter cabinet without affecting heat dissipation. When it rains, the baffle unfolds outward, effectively preventing rainwater and splashing water droplets from directly entering the heat dissipation vents or gaps in the converter cabinet shell. It also effectively blocks direct sunlight and external high-temperature radiation, reducing the surface and internal ambient temperature of the converter cabinet shell, alleviating the burden on the heat dissipation system, and preventing the internal temperature from exceeding the standard due to external overheating. When cleaning the heat dissipation plate, the moving plate moves the connecting shell, which in turn moves the moving column. The moving column then drives the striking block to strike the heat dissipation plate, ensuring both heat dissipation and protection. During long-term operation of the frequency converter cabinet, the heat dissipation plate easily accumulates dust, lint, and even damp clumps, which are difficult to remove with simple ventilation. This invention shakes off the dust adhering to the heat dissipation plate, keeping the heat dissipation channels unobstructed, improving heat exchange efficiency, and preventing overheating, frequency reduction, or shutdown of components due to dust accumulation. It also reduces the risk of condensation and corrosion.

[0017] 3. In this invention, when the protective strip extends to shield from rain, the moving rod drives the extension rod to move, and the extension rod drives the shield to open. The opening of the shield will shield both sides of the converter cabinet, preventing rainwater from entering the heat dissipation plate. At the same time, it can prevent rainwater from carrying mud, sand, and debris to adhere to the heat dissipation plate and component surfaces, reducing the amount of cleaning and maintenance work later. In outdoor, humid, or open-air conditions, this structure can significantly reduce the risk of converter cabinet corrosion and electrical failure, ensure stable operation of equipment in rainy weather, and further improve the overall protection level and service life of the frequency converter cabinet. When the shield rotates open, the pulley and damping block dampen the shield, preventing rapid shaking and impact noise due to inertia or wind impact, reducing mechanical wear and component fatigue, effectively resisting external vibration, gusts of wind, and other interference, preventing accidental displacement or shaking of the shield, and ensuring that it remains in a stable protective position under high temperature and rainy conditions without affecting heat dissipation and rain protection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the position and structure of the heat sink and motor in this invention; Figure 3 This is a schematic diagram showing the positional structure of the movable plate and rotating rod of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structural position at point A in the middle; Figure 5 This is a schematic diagram showing the position and structure of the winding drum and protective belt of the present invention; Figure 6 This is a schematic diagram showing the positional structure of the connecting shell and the trapezoidal block in this invention; Figure 7 For the present invention Figure 6 Enlarged view of the structural position at point B in the middle; Figure 8 This is a schematic diagram showing the position and structure of the spiral rod and the baffle plate of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of the structural position at point C.

[0019] The meanings of the labels in the diagram are as follows: 1. Converter cabinet; 2. Cabinet door; 3. Heat sink; 4. Mounting frame; 5. Hinge plate; 6. Gear; 7. Motor; 8. Threaded rod one; 9. Sliding rod; 10. Limiting rod one; 11. Rack; 12. Moving plate; 13. Rotating rod; 14. Brush cylinder; 15. Rubber wheel; 16. Protective mechanism; 161. Explosion-proof motor; 162. Threaded rod two; 163. Moving rod; 164. Sliding plate; 165. Rewinding mechanism 166. Cylinder; 167. Protective belt; 168. Limiting rod II; 169. Connecting shell; 1610. Moving column; 1611. Striking block; 1612. Trapezoidal block; 17. Auxiliary mechanism; 171. Extension rod; 172. Positioning block; 173. Helical rod; 174. Baffle plate; 175. Pull rod; 176. Hinge block; 177. Elastic telescopic rod; 178. Pulley; 179. Damping block; 1710. Limiting frame. Detailed Implementation

[0020] 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. Example

[0021] Please see Figures 1-4 One embodiment of the present invention is: a frequency converter cabinet with protective function, including a converter cabinet shell 1, a cabinet door 2 rotatably installed on the converter cabinet shell 1, a heat sink 3 fixedly installed inside the converter cabinet shell 1, a humidity sensor and a temperature sensor installed inside the converter cabinet shell 1, and the frequency converter cabinet with protective function also includes an opening adjustment mechanism installed on the converter cabinet shell 1 and a cleaning mechanism installed on the heat sink 3. The opening adjustment mechanism includes a mounting frame 4 installed on the converter cabinet 1, a hinge plate 5 installed inside the mounting frame 4, gears 6 installed on both sides of the hinge plate 5, a motor 7 installed inside the converter cabinet 1, a threaded rod 8 fixedly installed on the output end of the motor 7, a sliding rod 9 installed on the threaded rod 8, a rack 11 installed on the sliding rod 9, and a limiting rod 10 installed inside the converter cabinet 1. The gear 6 meshes with the rack 11, and the rack 11 is slidably embedded in the interior of the converter cabinet 1. The output end of the motor 7 rotates through the interior of the converter cabinet 1. The threaded rod 8 is rotatably connected to the interior of the converter cabinet 1. The interior of the sliding rod 9 contacts the outer wall of the limiting rod 10. The motor 7 is connected to a humidity sensor to control the size of the heat dissipation opening of the heat sink 3.

[0022] The cleaning mechanism includes a movable plate 12 mounted on a threaded rod 8, a rotating rod 13 mounted inside the movable plate 12, a brush cylinder 14 mounted on the rotating rod 13, and a rubber wheel 15 mounted on the rotating rod 13, for cleaning the heat sink 3.

[0023] The interior of the movable plate 12 contacts the outer wall of the limiting rod 10, the movable plate 12 contacts the interior of the converter cabinet 1, the outer wall of the rubber wheel 15 contacts the outer wall of the heat sink 3, and the brush cylinder 14 contacts the outer wall of the heat sink 3.

[0024] In this embodiment, when the device is in operation, the operator closes cabinet door 2, and the power frequency AC power is connected through the input terminal of converter cabinet 1. The power is first absorbed by the lightning protection and surge protection module to absorb instantaneous overvoltages such as lightning strikes and voltage surges, so as to avoid damage to internal components. The current then enters the filtering and rectification unit, converting AC to DC. The inverter circuit, according to control commands, then converts the DC to AC output with adjustable frequency and voltage, achieving energy saving and precise control. When the converter cabinet 1 is working, the interior of the cabinet 1 is cooled by the heat sink 3. When it rains outside the cabinet 1, a humidity sensor detects this. Upon detection, the humidity sensor activates the motor 7. The motor 7 rotates through its output end, driving the threaded rod 8 to rotate. The rotation of the threaded rod 8, through the spiral groove on its circumferential surface, moves the sliding rod 9. The sliding rod 9 moves the rack 11 upwards, moving it along the teeth of the gear 6. The rack 11 meshes with the gear 6, and the movement of the rack 11 drives the gear 6 to rotate. The rotation of the gear 6 drives the hinge plate 5 to rotate along the interior of the mounting frame 4, rotating towards the heat sink 3. The rotation of hinge plate 5 will reduce the opening of the mounting frame 4, thus preventing rainwater from entering the heat sink 3 during rain. When the humidity decreases, the reverse rotation of motor 7 will drive the threaded rod 8 to reverse, which in turn drives the sliding rod 9 to reverse. The sliding rod 9 drives the rack 11 to descend along the limit rod 10. The rack 11 will drive the gear 6 to reverse, which in turn drives the hinge plate 5 to open, thus opening the heat sink vent of the heat sink 3. This allows the frequency converter cabinet to achieve a dynamic balance between heat dissipation and protection, significantly improving equipment reliability. When the ambient humidity is low, the heat sink vent opens moderately to ensure good ventilation and heat dissipation, preventing the components of the conversion device from aging or malfunctioning due to high temperature, further optimizing the working efficiency of the internal inverter. When the humidity is high, the opening automatically decreases to reduce the entry of humid air and condensation into the cabinet, preventing the circuit board from getting damp and short-circuiting, and reducing insulation degradation. At the same time, it can meet the requirements of dust prevention and corrosion prevention, reducing the intrusion of dust and corrosive gases, and reducing the risk of corrosion and leakage of internal conversion device components. When the hinge plate 5 is opened and closed, the rotation of the threaded rod 8 will drive the moving plate 12 to move. The movement of the moving plate 12 will drive the rotating rod 13 to move back and forth. The rotating rod 13 will drive the rubber wheel 15 to move back and forth. The rubber wheel 15 will contact the outer wall of the heat sink 3 through the outer rubber wall. Thus, the rubber wheel 15 will rotate while moving. The rubber wheel 15 will rotate while driving the rotating rod 13 to move. The rotating rod 13 will rotate while driving the brush cylinder 14 to move up and down. Thus, the brush cylinder 14 will clean the outer wall of the heat sink 3, effectively removing the attached dust, lint and oil, ensuring that the heat dissipation channel is unobstructed and the heat exchange efficiency is normal. It will prevent the heat from accumulating and causing the temperature of the core components of the frequency converter to be too high. Timely cleaning can prevent the equipment from triggering high temperature protection, automatic frequency reduction or even accidental shutdown due to overheating. It can ensure continuous and stable production, greatly reduce electrical faults and safety hazards, and improve the insulation performance inside the converter cabinet 1. Example

[0025] Please see Figures 5-7 Based on the above embodiments, in another embodiment of the present invention, the frequency converter cabinet with protective function further includes a protective mechanism 16 installed on the converter cabinet 1, for extending protection during maintenance or overheating. The protective mechanism 16 includes an explosion-proof motor 161 mounted on the converter cabinet 1, a threaded rod 162 mounted on the output end of the explosion-proof motor 161, a moving rod 163 mounted on the threaded rod 162, a sliding plate 164 mounted on the moving rod 163, a take-up drum 165 mounted on the converter cabinet 1, a protective belt 166 mounted on the take-up end of the take-up drum 165, and a limiting rod 167 mounted on the converter cabinet 1. The interior of the sliding plate 164 contacts the outer wall of the limiting rod 167. The side of the protective belt 166 away from the take-up drum 165 is fixedly connected to the sliding plate 164. The output end of the explosion-proof motor 161 rotatably penetrates the outer wall of the converter cabinet 1. The threaded rod 162 is rotatably connected to the outer wall of the converter cabinet 1. The explosion-proof motor 161 is connected to a humidity sensor and a temperature sensor.

[0026] The frequency converter cabinet with protective functions also includes a knocking mechanism installed on the movable plate 12 to shake off the dust on the heat sink 3; The striking mechanism includes a connecting shell 168 mounted on the movable plate 12, a movable column 169 mounted on the connecting shell 168, a striking block 1610 mounted on the movable column 169, and a trapezoidal block 1611 mounted on the heat sink 3.

[0027] A spring is provided between the connecting shell 168 and the moving column 169. The striking end of the striking block 1610 contacts the outer wall of the heat sink 3. An inclined surface is provided on the trapezoidal block 1611.

[0028] In this embodiment, during rainy or sunny weather, the humidity or temperature sensor inside the converter cabinet 1 will activate the explosion-proof motor 161. The operation of the explosion-proof motor 161 will rotate the threaded rod 162 via its output end. The rotation of the threaded rod 162 will then move the moving rod 163 via its threaded groove. The moving rod 163 will cause the sliding plate 164 to move along the outer wall of the limiting rod 167. The movement of the limiting rod 167 will extend the protective belt 166, pulling out the wound portion of the winding drum 165. This provides shelter for maintenance personnel during high-temperature or rainy weather. Simultaneously, it can... On hot days, the shielding blocks sunlight to prevent the outer wall temperature of the converter cabinet 1 from becoming too high. When the temperature drops at night, the explosion-proof motor 161 drives the threaded rod 162 to reverse, which in turn drives the sliding plate 164 to reset. The sliding plate 164 then drives the protective belt 166 to work with the winding drum 165 to wind up the belt. This can significantly improve the rain protection capability of the frequency converter cabinet without affecting heat dissipation. When it rains, the baffle opens outward to effectively block rainwater and splashing water droplets from directly entering the heat dissipation vents or gaps in the converter cabinet 1. It can also effectively block direct sunlight and external high-temperature radiation, reduce the surface and internal ambient temperature of the converter cabinet 1, reduce the burden on the heat dissipation system, and prevent the internal temperature from exceeding the standard due to external overheating. When cleaning the heat sink 3, the movement of the movable plate 12 will cause the connecting shell 168 to move, the connecting shell 168 will cause the movable column 169 to move, the movable column 169 will cause the striking block 1610 to move, the striking block 1610 will move along the outer wall of the heat sink 3, and the striking block 1610 will slide along the movement trajectory of the trapezoidal block 1611. The moving striking block 1610 will contact the inclined surface of the trapezoidal block 1611 through the inclined surface. After the striking block 1610 leaves the trapezoidal block 1611, the striking block 1610 will be reset by the spring between the movable column 169 and the connecting shell 168. The reset of the striking block 1610 will strike the heat sink 3 to ensure the heat dissipation and protection effect. During long-term operation of the frequency converter cabinet, the heat sink 3 is prone to accumulating dust, lint, or even moisture and clumps, which are difficult to remove with simple ventilation. The dust attached to the heat sink 3 can be shaken off, keeping the heat dissipation channel unobstructed, improving heat exchange efficiency, avoiding overheating, frequency reduction or shutdown of the device due to dust insulation, and reducing the risk of condensation and corrosion. Example

[0029] Please see Figures 8-9 Based on the above embodiments, in another embodiment of the present invention, the frequency converter cabinet with protective function further includes an auxiliary mechanism 17 installed on the sliding plate 164 to prevent rainwater from entering the heat dissipation plate 3. The auxiliary mechanism 17 includes an extension rod 171 mounted on a sliding plate 164, a positioning block 172 mounted on a converter cabinet 1, a spiral rod 173 mounted inside the positioning block 172, and a baffle plate 174 mounted on the spiral rod 173. The extension rod 171 contacts the outer wall of the converter cabinet 1, and a movable block is provided inside the extension rod 171. A spiral groove is provided on the outer wall of the spiral rod 173, and the movable block is slidably embedded in the spiral groove. The extension rod 171 contacts the outer wall of the limiting rod 167, and the baffle plate 174 contacts the interior of the extension rod 171 and the outer wall of the converter cabinet 1.

[0030] The frequency converter cabinet with protective functions also includes a damping mechanism installed on the shield 174 to prevent the shield 174 from loosening during operation; The damping mechanism includes a pull rod 175 mounted on the baffle plate 174, a hinge block 176 mounted on the pull rod 175, an elastic telescopic rod 177 mounted on the hinge block 176, a pulley 178 mounted on the elastic telescopic end of the elastic telescopic rod 177, a damping block 179 mounted on the converter cabinet 1, and a limit frame 1710 mounted on the converter cabinet 1.

[0031] The hinge block 176 is in contact with the inside of the limit frame 1710, and the elastic telescopic rod 177 is in contact with the outer wall of the converter cabinet 1.

[0032] In this embodiment, when the protective strip 166 extends to provide rain protection, the movement of the moving rod 163 will drive the extension rod 171 to move. The extension rod 171 will contact the spiral groove of the spiral rod 173 through the internal movable block, thereby causing the extension rod 171 to drive the spiral rod 173 to rotate. The spiral rod 173 drives the baffle plate 174 to open along the axis of the positioning block 172. The opening of the baffle plate 174 will cover both sides of the converter cabinet 1, preventing rainwater from entering the heat sink 3. At the same time, it can prevent rainwater from carrying mud, sand and debris to adhere to the heat sink 3 and the surface of components, reducing the amount of cleaning and maintenance work in the later stage. In outdoor, humid or open-air conditions, this structure can significantly reduce the risk of corrosion and electrical failure of the converter cabinet 1, ensure stable operation of the equipment in rainy weather, and further improve the overall protection level and service life of the frequency converter cabinet. When the baffle 174 rotates open, the rotation of the baffle 174 will pull the lever 175 to move. The lever 175 will cause the hinge block 176 to slide along the limit frame 1710. The hinge block 176 will cause the elastic telescopic rod 177 to move. The movement of the elastic telescopic rod 177 will cause the pulley 178 to move. The movement of the pulley 178 will cause it to contact the arc surface of the damping block 179 through its circumferential surface. The movement of the pulley 178 will cause it to press against the arc surface of the damping block 179. The pulley 178 will then exert pressure on the elastic telescopic rod 177. After the elastic telescopic end retracts and moves away from the damping block 179, the pulley 178 will be reset through the elastic telescopic end of the elastic telescopic rod 177. Thus, the pulley 178, together with the damping block 179, dampens the baffle 174, preventing rapid shaking and impact noise due to inertia or wind impact, reducing mechanical wear and component fatigue, effectively resisting external vibration, gusts of wind and other interference, preventing the baffle 174 from accidentally shifting or shaking, and ensuring that it remains in a stable protective position under high temperature, rainy weather and other working conditions without affecting heat dissipation and rainproof effect.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] 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 frequency converter cabinet with protective function, comprising a converter cabinet housing (1), a cabinet door (2) rotatably mounted on the converter cabinet housing (1), a heat sink (3) fixedly mounted inside the converter cabinet housing (1), and a humidity sensor and a temperature sensor disposed inside the converter cabinet housing (1), characterized in that, The frequency converter cabinet with protective function also includes an opening adjustment mechanism installed on the converter cabinet shell (1) and a cleaning mechanism installed on the heat sink (3); The opening adjustment mechanism includes a mounting frame (4) installed on the converter cabinet (1), a hinge plate (5) installed inside the mounting frame (4), gears (6) installed on both sides of the hinge plate (5), a motor (7) installed inside the converter cabinet (1), a threaded rod (8) fixedly installed on the output end of the motor (7), a sliding rod (9) installed on the threaded rod (8), a rack (11) installed on the sliding rod (9), and a limiting rod (10) installed inside the converter cabinet (1). The gear (6) meshes with the rack (11), the rack (11) slides and is embedded in the interior of the converter cabinet (1), the output end of the motor (7) rotates through the interior of the converter cabinet (1), the threaded rod (8) is rotatably connected to the interior of the converter cabinet (1), the interior of the sliding rod (9) contacts the outer wall of the limiting rod (10), and the motor (7) is connected to a humidity sensor to control the size of the heat dissipation area of ​​the heat sink (3).

2. The frequency converter cabinet with protective function according to claim 1, characterized in that: The cleaning mechanism includes a movable plate (12) mounted on the threaded rod (8), a rotating rod (13) mounted inside the movable plate (12), a brush cylinder (14) mounted on the rotating rod (13), and a rubber wheel (15) mounted on the rotating rod (13), for cleaning the heat sink (3).

3. The frequency converter cabinet with protective function according to claim 2, characterized in that: The interior of the movable plate (12) is in contact with the outer wall of the limiting rod (10), the movable plate (12) is in contact with the interior of the converter cabinet (1), the outer wall of the rubber wheel (15) is in contact with the outer wall of the heat sink (3), and the brush cylinder (14) is in contact with the outer wall of the heat sink (3).

4. The frequency converter cabinet with protective function according to claim 1, characterized in that: The frequency converter cabinet with protective function also includes a protective mechanism (16) installed on the converter cabinet (1) for extending protection during maintenance or overheating. The protective mechanism (16) includes an explosion-proof motor (161) mounted on the converter cabinet (1), a threaded rod (162) mounted on the output end of the explosion-proof motor (161), a moving rod (163) mounted on the threaded rod (162), a sliding plate (164) mounted on the moving rod (163), a winding drum (165) mounted on the converter cabinet (1), a protective strip (166) mounted on the winding end of the winding drum (165), and a protective strip (166) mounted on the converter cabinet (1). 1) Limiting rod two (167) on the upper part, the interior of the sliding plate (164) is in contact with the outer wall of the limiting rod two (167), the protective belt (166) is fixedly connected to the sliding plate (164) on the side away from the winding drum (165), the output end of the explosion-proof motor (161) is rotatably connected to the outer wall of the converter cabinet (1), the threaded rod two (162) is rotatably connected to the outer wall of the converter cabinet (1), the explosion-proof motor (161) is connected to the humidity sensor, and the explosion-proof motor (161) is connected to the temperature sensor.

5. The frequency converter cabinet with protective function according to claim 3, characterized in that: The frequency converter cabinet with protective function also includes a knocking mechanism installed on the movable plate (12) for shaking off the dust on the heat sink plate (3); The striking mechanism includes a connecting shell (168) mounted on the movable plate (12), a movable column (169) mounted on the connecting shell (168), a striking block (1610) mounted on the movable column (169), and a trapezoidal block (1611) mounted on the heat sink (3).

6. The frequency converter cabinet with protective function according to claim 5, characterized in that: A spring is provided between the connecting shell (168) and the moving column (169), the striking end of the striking block (1610) contacts the outer wall of the heat sink (3), and an inclined surface is provided on the trapezoidal block (1611).

7. The frequency converter cabinet with protective function according to claim 4, characterized in that: The frequency converter cabinet with protective function also includes an auxiliary mechanism (17) installed on the sliding plate (164) to prevent rainwater from entering the heat dissipation plate (3); The auxiliary mechanism (17) includes an extension rod (171) mounted on the sliding plate (164), a positioning block (172) mounted on the converter cabinet (1), a spiral rod (173) mounted inside the positioning block (172), and a baffle plate (174) mounted on the spiral rod (173). The extension rod (171) contacts the outer wall of the converter cabinet (1). A movable block is provided inside the extension rod (171). A spiral groove is provided on the outer wall of the spiral rod (173). The movable block is slidably embedded in the spiral groove. The extension rod (171) contacts the outer wall of the limiting rod (167). The baffle plate (174) contacts the inside of the extension rod (171) and the outer wall of the converter cabinet (1).

8. The frequency converter cabinet with protective function according to claim 7, characterized in that: The frequency converter cabinet with protective function also includes a damping mechanism installed on the shield (174) to prevent the shield (174) from loosening during operation; The damping mechanism includes a pull rod (175) mounted on the baffle plate (174), a hinge block (176) mounted on the pull rod (175), an elastic telescopic rod (177) mounted on the hinge block (176), a pulley (178) mounted on the elastic telescopic end of the elastic telescopic rod (177), a damping block (179) mounted on the converter cabinet (1), and a limiting frame (1710) mounted on the converter cabinet (1).

9. The frequency converter cabinet with protective function according to claim 8, characterized in that: The hinge block (176) contacts the interior of the limiting frame (1710), and the elastic telescopic rod (177) contacts the outer wall of the converter cabinet (1).

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