Low-voltage cabinet with anti-condensation heating assembly

Abstract

The present application relates to the technical field of low-voltage cabinet, especially to a low-voltage cabinet with anti-condensation heating assembly, comprising: a cabinet body and a heating unit installed in the cabinet body; the heating unit comprises an air inlet frame, a condensation assembly and a heat dissipation assembly, the condensation assembly is installed on the front side of the air inlet frame, the heat dissipation assembly is installed on the front side of the condensation assembly, a bearing position is formed on the front end of the air inlet frame, and the heat dissipation assembly is placed on the bearing position, wherein a communication port for communicating the air inlet frame and the heat dissipation assembly is formed on the end face of the bearing position, air is introduced through the air inlet frame, the air in the cabinet body is condensed by the condensation assembly, and the moisture in the air is effectively removed; since the specific heat capacity of dry air is low, the heat emitted by the back end of the condensation assembly can more efficiently increase the air temperature in the subsequent heating stage; and by adopting the mode of dehumidification first and then heating, the heating efficiency in the cabinet body is also significantly improved.

Description

Technical Field

[0001] This invention relates to the field of low-pressure switchgear technology, and in particular to a low-pressure switchgear with an anti-condensation heating component. Background Technology

[0002] In power systems, low-voltage switchgear, as a key device for carrying and protecting low-voltage electrical appliances, directly affects the reliability of the entire power supply system. However, the internal environment of low-voltage switchgear is complex and easily affected by external climatic conditions. Especially in environments with high humidity or large diurnal temperature differences, moisture in the air inside the switchgear will condense on the surfaces of cooler metal parts or insulating materials, forming dew, a phenomenon known as "condensation."

[0003] Condensation poses a serious threat to the safe operation of low-voltage switchgear. Condensed moisture significantly reduces the insulation performance of insulating materials, increasing the risk of leakage or even short circuits. Simultaneously, moisture accelerates the corrosion process of metal components, affecting conductivity and mechanical strength, and shortening equipment lifespan. Currently, the mainstream technical solution for preventing condensation inside low-voltage switchgear primarily involves installing heaters inside the cabinet to raise the overall temperature of the air. The basic principle is to continuously heat the air inside the cabinet to maintain a temperature above the "dew point" temperature where condensation may occur, thereby preventing water vapor from condensing on cold surfaces.

[0004] While this heating method can help prevent condensation to some extent, its limitations are becoming increasingly apparent. First, air has a relatively high specific heat capacity, and directly heating the air inside the entire cabinet requires a significant amount of electrical energy, especially when the cabinet is large, the initial humidity is high, or the ambient temperature is low. Reaching and maintaining the temperature required to prevent condensation not only requires a long preheating time, but also results in significant energy loss during the heating process, leading to low heating efficiency.

[0005] Based on this, in order to optimize the heating effect of existing heating devices on the cabinet, we propose a low-pressure cabinet with anti-condensation heating components. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as the high energy consumption required for direct heating of the air inside the cabinet, especially when the cabinet is large, the initial humidity is high, or the ambient temperature is low, resulting in significant energy loss during the heating process. This invention proposes a low-pressure cabinet with an anti-condensation heating component.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] Design a low-voltage cabinet with an anti-condensation heating component, including:

[0009] The cabinet and the heating unit installed in the cabinet;

[0010] The heating unit includes an air inlet frame, a condenser assembly, and a heat dissipation assembly. The condenser assembly is installed on the front side of the air inlet frame, and the heat dissipation assembly is installed on the front side of the condenser assembly. A support position is also formed at the front end of the air inlet frame, and the heat dissipation assembly is placed on the support position. A communication port connecting the air inlet frame and the heat dissipation assembly is opened on the end face of the support position.

[0011] Furthermore, the condensation assembly includes a cooling plate and heat dissipation fins attached to the heating end of the cooling plate;

[0012] The air inlet frame has an opening at its front end, the cooling end of the cooling chip is placed in the opening, and the communication port is located below the heat dissipation fins.

[0013] Furthermore, the heat dissipation assembly includes at least one fan fixed on the heat dissipation fins, and a grille is fixedly installed at the front end of the heat dissipation fins, the grille being sleeved on the outside of the heat dissipation fins.

[0014] The bottom of the grille cover has a clearance opening, which is arranged opposite to the connecting opening.

[0015] Furthermore, an air inlet is provided at the upper end of the air inlet frame, and an air passage is formed between the air inlet and the connecting port. A water storage cavity is formed at the bottom of the air inlet frame, and a drain outlet is connected to the water storage cavity of the air inlet frame. An air guide and water scraping assembly is also provided inside the air inlet frame, and the air guide and water scraping assembly is used to form multiple air channels on the cooling plate.

[0016] Furthermore, the air guide and wiper assembly includes an upper frame and a lower frame fixed inside the air inlet frame, and a slide is formed between the upper frame and the lower frame.

[0017] The slide rail is equipped with a sliding seat, and the front end of the sliding seat is fixedly connected to a mounting plate by a rod. Several scraper strips are formed at intervals on the end face of the mounting plate. Several scraper strips are in contact with the cooling element, and multiple air ducts are formed between the scraper strips and the cooling end of the cooling element.

[0018] Furthermore, guide posts are fixedly installed on both the upper and lower sides of the sliding seat, and guide grooves are formed on the opposite surfaces of the upper frame and the lower frame, with the guide posts and guide grooves slidably connected.

[0019] The upper frame and the lower frame are fixedly connected by a connecting part, the back end of the sliding seat is formed with a groove, and springs are fixedly installed between the two sides of the connecting part and the two side walls of the groove.

[0020] Furthermore, a motor is fixedly installed on the bent surface of the lower frame, the shaft end of the motor passes through the bent surface of the lower frame, and a cam is fixedly installed on the shaft end of the motor, the cam abutting against the side of the sliding seat.

[0021] Furthermore, the air inlet frame has an installation port at its opening, and a cover plate is fixedly installed at the installation port by fasteners. Two support seats are slidably connected to the inner side of the cover plate, and a demister is fixedly connected to the upper end of the two support seats. The demister is placed below the communication port for water mist separation.

[0022] Furthermore, a guide groove is provided on the end face of the bearing seat, and a guide seat is fixedly installed on the inner end of the cover plate. The guide seat is slidably connected in the guide groove, and a compression spring is fixedly installed between the guide seat and the bottom end of the bearing seat.

[0023] Furthermore, a guide shaft is fixedly installed on the side of the demister, and a wheel is rotatably connected to the outer side of the guide shaft;

[0024] A trigger rod is fixedly installed at the bottom of the sliding seat. The bottom end of the trigger rod is formed with an arc-shaped part. The trigger rod abuts against the wheel through the arc-shaped part to drive the demister to move downward.

[0025] The present invention proposes a low-voltage cabinet with an anti-condensation heating component, which has the following advantages: the present invention introduces air through the air inlet frame and uses the condensation component to condense the air inside the cabinet, effectively removing moisture from the air. Since dry air has a low specific heat capacity, the heat emitted from the back end of the condensation component can more efficiently raise the air temperature in the subsequent heating stage. By adopting the method of dehumidifying before heating, not only is the energy required for heating reduced and the heating power demand decreased, but the heating efficiency inside the cabinet is also significantly improved. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the installation of the heating unit of the present invention inside the cabinet;

[0027] Figure 2 This is a schematic diagram of the heating unit structure of the present invention;

[0028] Figure 3 The heating unit of the present invention exploded. Figure 1 ;

[0029] Figure 4 The heating unit of the present invention exploded. Figure 2 ;

[0030] Figure 5 This is a schematic diagram of the condenser assembly structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the air inlet frame structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the air guide and water wiper assembly structure of the present invention. Figure 1 ;

[0033] Figure 8 This is a schematic diagram of the air guide and water wiper assembly structure of the present invention. Figure 2 ;

[0034] Figure 9 This is a schematic diagram of the cover plate structure of the present invention;

[0035] Figure 10 This is a cross-sectional view of the heating unit of the present invention.

[0036] In the diagram: 1. Cabinet; 2. Heating unit; 21. Air inlet frame; 211. Air inlet; 212. Water storage chamber; 213. Drain outlet; 22. Condensation assembly; 221. Cooling element; 222. Heat dissipation fins; 23. Heat dissipation assembly; 231. Fan; 232. Grille cover; 233. Clearance opening; 24. Support position; 25. Connecting opening; 26. Air guide and water scraper assembly; 261. Upper frame; 262. Lower frame; 2 63. Slide rail; 264. Sliding seat; 265. Mounting plate; 266. Scraper; 267. Guide post; 268. Guide groove; 269. Connecting part; 2610. Spring; 2611. Motor; 2612. Cam; 27. Cover plate; 271. Bearing seat; 272. Demister; 273. Guide groove; 274. Guide seat; 275. Compression spring; 276. Guide shaft; 277. Wheel; 278. Trigger rod. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Reference Figures 1-10 In one embodiment of the present invention, a low-pressure cabinet with an anti-condensation heating component is disclosed. Specifically, the low-pressure cabinet includes a cabinet body 1 and a heating unit 2 installed in the cabinet body 1. Specifically, in this embodiment, the heating unit 2 is installed on the lower inner side of the cabinet body 1. The heating unit 2 can be configured as one or two, with the two heating units 2 symmetrically distributed inside the cabinet body 1. By continuously heating the inside of the cabinet body 1, the heating unit 2 increases the air temperature inside the cabinet, reduces the relative humidity, and thereby increases the temperature of the inner wall surface of the cabinet, making it higher than the air dew point, thus preventing condensation inside.

[0039] The heating unit 2 includes an air inlet frame 21, a condenser assembly 22, and a heat dissipation assembly 23. The condenser assembly 22 is installed on the front side of the air inlet frame 21, and the air inlet frame 21 is attached to the end face of the cabinet 1. The heat dissipation assembly 23 is installed on the front side of the condenser assembly 22. A support position 24 is also formed at the front end of the air inlet frame 21, and the heat dissipation assembly 23 is placed on the support position 24. The end face of the support position 24 is provided with a connecting port 25 that connects the air inlet frame 21 and the heat dissipation assembly 23. The connecting port 25 is used to output air upward. In this embodiment, a sealing ring can also be added at the support position 24 to ensure the sealing of the connection between the grille cover 232 and its bottom.

[0040] In other words, by adopting the design of the air inlet frame 21 in this invention, the air inside the cabinet 1 is condensed and cooled by the condensing component 22 during operation to reduce the moisture in the gas. Then, the heat emitted from the back end of the condensing component 22 heats the air. Since dry air has a low specific heat capacity, less energy is required for heating. Therefore, by dehumidifying and then heating the air, the heating power requirement can be reduced, and the heating efficiency inside the cabinet 1 can be improved. The specific operation method will be described in detail later, and will not be elaborated here.

[0041] In some embodiments, the condensation assembly 22 of the present invention includes a cooling plate 221 and heat dissipation fins 222 attached to the heating end of the cooling plate 221. Specifically, in this embodiment, mounting holes are provided on both sides of the heat dissipation fins 222. The heat dissipation fins 222 can be connected and fixed to the inner wall of the cabinet 1 through the mounting holes. Of course, the heat dissipation fins 222 of the present invention include a base and a plurality of fins connected to the base. Heat is conducted through the base and the heat is dissipated by the fins. This method is a conventional method for those skilled in the art and will not be described in detail here.

[0042] In addition, the front opening of the air inlet frame 21, the cooling chip 221 in this embodiment is a semiconductor cooling chip, and a sealing ring can be provided between the cooling end of the semiconductor cooling chip and the opening to improve the sealing capability;

[0043] The cooling end of the cooling element 221 is placed in the opening, and the connecting port 25 is located below the heat dissipation fins 222. That is to say, in this invention, the cooling and heating characteristics of the cooling element 221 on both sides are used to achieve the purpose of dehumidifying the air and heating it at the same time. In actual operation, since the cooling end of the cooling element 221 is placed in the front opening of the air inlet frame 21, when the air enters the interior of the air inlet frame 21, it will come into contact with the cooling surface of the cooling element 221. The low temperature of the surface of the cooling element 221 will condense the water vapor in the air into water droplets, thus achieving the purpose of dehumidifying the air in the cabinet 1. Of course, the dehumidified air moves upward along the connecting port 25 and enters the heat dissipation component 23. After being heated by the heat dissipation component 23, it is discharged into the cabinet 1. This cycle is repeated to achieve the dehumidification and heating of the air in the cabinet 1, so as to avoid condensation inside the cabinet 1.

[0044] Based on the above embodiments, the heat dissipation component 23 of the present invention includes at least one fan 231 fixed on the heat dissipation fins 222. Of course, in this embodiment, the fan 231 can be configured as two. A grille cover 232 is also fixedly installed at the front end of the heat dissipation fins 222, and the grille cover 232 is sleeved on the outside of the heat dissipation fins 222.

[0045] The bottom of the grille cover 232 has a clearance opening 233, which is arranged opposite to the connecting opening 25.

[0046] Specifically, in this invention, the air circulation is maintained by a fan 231. When the fan 231 is working, it will draw the air out of the connection port 25, heat it on the heat dissipation fins 222, and then discharge it into the cabinet 1 along the front end of the fan 231.

[0047] The negative pressure suction at the back of the fan 231 draws in the air inside the cabinet 1 through the air inlet 211 on the air inlet frame 21. The air is then condensed and dehumidified by the cooling plate 221. After condensation, the air continues to enter the heat dissipation fins 222 through the connecting port 25. Due to the heating characteristics of the back of the cooling plate 221, the heat dissipated by the cooling plate 221 can heat the dehumidified air. The heated air is then discharged into the cabinet 1. This cycle repeats, thus heating the inside of the cabinet 1 to achieve the purpose of preventing condensation inside.

[0048] Furthermore, the upper end of the air inlet frame 21 in this invention is provided with an air inlet 211, and the air inlet 211 and the connecting port 25 form an air passage. Of course, this air passage is connected to the heat dissipation component 23. A water storage cavity 212 is formed at the bottom of the air inlet frame 21, and a drain outlet 213 is connected to the water storage cavity 212. The drain outlet 213 extends to the outside of the cabinet 1 to discharge condensate. An air guide and water scraper assembly 26 is also provided inside the air inlet frame 21. The air guide and water scraper assembly 26 is used to form multiple air channels on the cooling plate 221.

[0049] In this invention, an air inlet 211 is provided at the top to allow air to enter the cabinet 1. A water storage chamber 212 is provided to collect the dripping condensate. The collected condensate is then discharged to the outside of the cabinet 1 through a drain outlet 213. In addition, a wind guide and water scraper assembly 26 is provided to improve the dehumidification effect after the air enters, thereby reducing the humidity in the air and facilitating subsequent heating operations.

[0050] Based on the above embodiments, the air guide and wiper assembly 26 of the present invention includes an upper frame 261 and a lower frame 262 fixed inside the air inlet frame 21. In this embodiment, both the upper frame 261 and the lower frame 262 can be fixed inside the air inlet frame 21 by bolts. At the same time, the upper frame 261 and the lower frame 262 are symmetrically designed. In this embodiment, the upper frame 261 is bent in a U-shape. The upper end of the upper frame 261 is formed with an air guide slope. The air guide slope is used to guide air to the end face of the cooling chip 221. A slide 263 is formed between the upper frame 261 and the lower frame 262.

[0051] The slide rail 263 is equipped with a sliding seat 264. The front end of the sliding seat 264 is fixedly connected to a mounting plate 265 by a rod. A plurality of scraper strips 266 are formed at intervals on the end face of the mounting plate 265. The scraper strips 266 are in contact with the cooling chip 221, and multiple air ducts are formed between the scraper strips 266 and the cooling end of the cooling chip 221.

[0052] Specifically, in this embodiment of the invention, a sliding seat 264 is installed between the upper frame 261 and the lower frame 262. Since the front end of the sliding seat 264 is equipped with several scrapers 266, multiple air ducts are formed between the cooling element 221, the upper frame 261 and the lower frame 262 by means of the scrapers 266. When the air inside the cabinet 1 enters the air inlet frame 21, the contact effect with the cooling element 221 can be optimized through the design of multiple air ducts, thereby improving the dehumidification stability.

[0053] In a further embodiment, guide posts 267 are fixedly installed on both the upper and lower sides of the sliding seat 264 of the present invention, and guide grooves 268 are formed on the opposite surfaces of the upper frame 261 and the lower frame 262, and the guide posts 267 and the guide grooves 268 are slidably connected.

[0054] Specifically, the guide groove 268 described in this invention is a straight groove, and two guide posts 267 are fixed on the upper and lower sides of the sliding seat 264. The guide posts 267 and the guide groove 268 are slidably adapted to achieve sliding guidance of the entire sliding seat 264. Of course, the guide posts 267 described in this embodiment can be set as bolts to achieve the purpose of convenient disassembly and assembly.

[0055] A connecting part 269 is fixedly connected between the upper frame 261 and the lower frame 262. A groove is formed on the back end of the sliding seat 264. Springs 2610 are fixedly installed between the two sides of the connecting part 269 and the two side walls of the groove. The springs 2610 are used to reset the sliding seat 264. In this way, the sliding seat 264 can be driven to slide by the driving structure, so that the entire sliding seat 264 drives the scraper 266 to move back and forth on the end face of the cooling plate 221 to scrape the surface of the cooling plate 221. This can promote the faster falling of water droplets. The specific method can be referred to the following scheme, which will not be elaborated here.

[0056] Based on the above embodiments, in this invention, a motor 2611 is fixedly installed on the bent surface of the lower frame 262, the shaft end of the motor 2611 passes through the bent surface of the lower frame 262, and a cam 2612 is fixedly installed on the shaft end of the motor 2611, the cam 2612 abuts against the side of the sliding seat 264.

[0057] In other words, during actual operation, after prolonged dehumidification and heating, water droplets will condense on the surface of the cooling element 221, thus affecting its contact with the air. At this time, the motor 2611 mentioned above can be turned on. When the motor 2611 is working, it will drive the cam 2612 to rotate. When the cam 2612 moves against the sliding seat 264, the entire sliding seat 264 will move the scraper 266 to scrape the water off the surface of the cooling element 221 and promote the water droplets to fall off.

[0058] Of course, when the cam 2612 rotates and resets, the entire sliding seat 264 resets under the resistance of the spring 2610. Thus, when the cam 2612 rotates back and forth, it works with the spring 2610 to drive the sliding seat 264 to move back and forth, scraping off water droplets on the cooling plate 221 and causing them to fall into the water storage chamber 212 for collection, thereby preventing the water droplets from affecting the dehumidification effect of the cooling plate 221.

[0059] In some embodiments, the air inlet frame 21 of the present invention has an installation port at its opening. A cover plate 27 is fixedly installed at the installation port by fasteners. In this embodiment, the cover plate 27 can be fixedly installed at the front installation port of the air inlet frame 21 by bolts and sealing rings. Two bearing seats 271 are slidably connected on the inner side of the cover plate 27. Specifically, in this embodiment, a guide groove 268 can also be opened on the end face of the bearing seat 271, and a guide post 267 is fixedly installed on the back end of the cover plate 27. In this way, the design of the guide post 267 and the guide groove 268 ensures the stable sliding of the bearing seat 271. The specific connection method can be referred to the sliding method of the sliding seat 264, the upper frame 261 and the lower frame 262 described above, which will not be elaborated here.

[0060] Demisters 272 are fixedly connected to the upper ends of the two bearing seats 271. It should be noted that the demister 272 in this invention is a baffle plate demister, whose working principle is based on inertial separation and collision trapping. When gas containing mist droplets passes through the baffle plate, the airflow is forced to change direction, generating turbulence and vortex effects. The mist droplets collide with the baffle plate under inertial force, thus being separated and removed from the airflow. Its design purpose is for water mist separation. Of course, the specific structure of the baffle plate demister is a well-known solution to those skilled in the art and will not be elaborated here. The demister 272 is placed below the connecting port 25 for water mist separation. Alternatively, the demister 272 in this invention can also be fixed to the bearing seat 271 by bolts or other fasteners for subsequent disassembly and maintenance.

[0061] Optionally, in this embodiment, a guide groove 273 is provided on the end face of the bearing seat 271, and a guide seat 274 is fixedly installed on the inner end of the cover plate 27. The guide seat 274 is slidably connected in the guide groove 273. A compression spring 275 is fixedly installed between the guide seat 274 and the bottom end of the bearing seat 271. Specifically, in this embodiment of the invention, the guide seat 274 is designed with a slidable connection structure. The purpose is to press the demister 272 downward during installation so that it can be inserted along the installation port. After insertion, the entire demister 272 can be moved upward to abut against the bottom of the communication port 25 by means of the resistance of the compression spring 275, so as to facilitate water mist separation. Of course, in subsequent maintenance, the cover plate 27 can be removed and the entire demister 272 can be disassembled.

[0062] It should be noted that the support seat 271 described in this embodiment is configured as an L-shaped structure, and the two support seats 271 are arranged horizontally.

[0063] In a further embodiment, considering that water droplets may condense on the surface of the demister 272 after prolonged operation, the reason is that since the water storage chamber 212 and the connecting port 25 are connected, when the air is circulating, water droplets may splash in the water storage chamber 212 when they drip. After a long time, water droplets may adhere to the demister 272. Therefore, in this invention, a guide shaft 276 is fixedly installed on the side of the demister 272, and a wheel 277 is rotatably connected to the outside of the guide shaft 276.

[0064] A trigger rod 278 is fixedly installed at the bottom of the sliding seat 264. The bottom end of the trigger rod 278 is formed with an arc-shaped part. The trigger rod 278 abuts against the wheel 277 through the arc-shaped part to drive the demister 272 to move downward.

[0065] When the sliding seat 264 moves the scraper 266 to scrape the surface of the cooling plate 221 to promote the dripping of water droplets, the movement of the sliding seat 264 also moves the trigger rod 278. When the trigger rod 278 moves, it will abut against the wheel 277 to drive the entire demister 272 to move downward. At the same time, when the trigger rod 278 moves back to its original position following the sliding seat 264, the demister 272 will start to move upward to its original position under the push of the compression spring 275. This creates a shaking effect so that the water droplets at the bottom of the demister 272 can fall off quickly to avoid affecting the demisting performance.

[0066] Specifically, when the trigger rod 278 described in this invention moves, its lower arc-shaped portion always contacts the wheel 277, and this process is repeated to achieve up-and-down movement control of the wheel 277.

[0067] In summary, this invention introduces air through the air inlet frame 21 and uses the condenser assembly 22 to condense the air inside the cabinet 1, effectively removing moisture from the air. Since dry air has a low specific heat capacity, the heat emitted from the back of the condenser assembly 22 can more efficiently raise the air temperature during the subsequent heating stage. By adopting the method of dehumidifying before heating, not only is the energy required for heating reduced and the heating power demand decreased, but the heating efficiency inside the cabinet 1 is also significantly improved.

[0068] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A low voltage cabinet with anti-condensation heating assembly, characterized in that, Include: Cabinet (1) and install in the cabinet (1) heating unit (2); The heating unit (2) includes an air inlet frame (21), a condensing assembly (22) and a heat dissipation assembly (23), the condensing assembly (22) is installed on the front side of the air inlet frame (21), the heat dissipation assembly (23) is installed on the front side of the condensing assembly (22), a bearing position (24) is further formed on the front end of the air inlet frame (21), the heat dissipation assembly (23) is placed on the bearing position (24), wherein the end face of the bearing position (24) is provided with a communication port (25) communicating with the air inlet frame (21) and the heat dissipation assembly (23); The condensing assembly (22) includes a refrigeration fin (221) and a heat dissipation fin (222) attached to the heating end of the refrigeration fin (221); The front end of the air inlet frame (21) is opened, the refrigeration end of the refrigeration fin (221) is placed in the opening, and the communication port (25) is located below the heat dissipation fin (222); The upper end of the air inlet frame (21) is provided with an air inlet (211), and the air inlet (211) and the communication port (25) constitute a wind path, the bottom of the air inlet frame (21) is formed with a water storage cavity (212), the air inlet frame (21) is further communicated with a drain port (213) at the water storage cavity (212), and the inside of the air inlet frame (21) is further provided with a wind guide and water scraping assembly (26), the wind guide and water scraping assembly (26) is used for forming a plurality of air ducts on the refrigeration fin (221); The wind guide and water scraping assembly (26) includes an upper frame (261) fixed in the inside of the air inlet frame (21) and a lower frame (262), and the upper frame (261) and the lower frame (262) constitute a slide (263); Wherein, the slide (263) is installed with a sliding seat (264), the front end of the sliding seat (264) is fixedly connected with a mounting plate (265) through a rod, the end face of the mounting plate (265) is formed with a plurality of scraping strips (266) at intervals, a plurality of scraping strips (266) and the refrigeration fin (221) are in contact, and a plurality of air ducts are formed between a plurality of scraping strips (266) and the refrigeration end of the refrigeration fin (221); The open end of the air inlet frame (21) has a mounting port, the mounting port is fixedly installed with a cover plate (27) through a fastener, two bearing seats (271) are slidingly connected on the inner side of the cover plate (27), the upper ends of the two bearing seats (271) are fixedly connected with a demister (272), and the demister (272) is placed below the communication port (25) for water mist separation; The end face of the bearing seat (271) is provided with a guide groove (273), the inner end of the cover plate (27) is fixedly installed with a guide seat (274), and the guide seat (274) is slidingly connected in the guide groove (273), wherein a compression spring (275) is fixedly installed between the guide seat (274) and the bottom end of the bearing seat (271). A guide shaft (276) is fixedly installed at the side of the demister (272), and a wheel (277) is rotatably connected to the outer side of the guide shaft (276); A trigger rod (278) is fixedly installed at the bottom of the sliding seat (264), the bottom end of the trigger rod (278) is shaped as an arc-shaped part, the trigger rod (278) abuts against the wheel (277) through the arc-shaped part, so as to drive the demister (272) to move downward.

2. The low voltage cabinet with anti-condensation heating assembly as claimed in claim 1, wherein: The heat dissipation assembly (23) comprises at least one fan (231) fixed on the heat dissipation fins (222), and a grille cover (232) is also fixedly installed at the front end of the heat dissipation fins (222), the grille cover (232) is sleeved on the outer side of the heat dissipation fins (222); The bottom of the grille cover (232) is provided with an avoiding opening (233), and the avoiding opening (233) is oppositely arranged with the communicating opening (25).

3. The low voltage cabinet with anti-condensation heating assembly as claimed in claim 1, wherein: The upper and lower sides of the sliding seat (264) are both fixedly installed with guide columns (267), and guide grooves (268) are formed on the opposite surfaces of the upper frame (261) and the lower frame (262), the guide columns (267) and the guide grooves (268) are in sliding connection; The upper frame (261) and the lower frame (262) are fixedly connected with a connecting part (269), the back end of the sliding seat (264) is shaped as a recess, and springs (2610) are fixedly installed between the two sides of the connecting part (269) and the two side walls of the recess.

4. The low voltage cabinet with anti-condensation heating assembly according to claim 3, characterized in that: A motor (2611) is fixedly installed on the bent surface of the lower frame (262), the shaft end of the motor (2611) penetrates through the bent surface of the lower frame (262), a cam (2612) is fixedly installed on the shaft end of the motor (2611), and the cam (2612) abuts against the side of the sliding seat (264).

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