Low-voltage power cabinet with enhanced heat dissipation

Abstract

The application relates to the technical field of low-voltage power cabinets, and discloses a low-voltage power cabinet with enhanced heat dissipation, which comprises a cabinet body, a cabinet door rotatably installed on the front of the cabinet body through a hinge, a driving assembly arranged at the top of the cabinet body, a base fixedly installed at the four corners of the bottom of the cabinet body, and a lower air vent formed in the bottom of the cabinet body, wherein the base makes the cabinet body away from the ground; through the layout design of the lower air vent in the bottom of the cabinet body and the upper air vent in the top of the cabinet body, the axial flow fan is positively rotated to realize the rapid discharge of air in the cabinet, the low-temperature air is inhaled, the heat of the hot air flow is absorbed and stored by the heat storage assembly, the axial flow fan is reversely rotated to inhale the warm and dry air in the upper layer when the machine is stopped, the heat storage assembly slowly releases heat, the second filter screen is driven by the sliding frame to switch positions, and double filtration is realized in cooperation with the first filter screen, so that the core demand of the low-voltage power cabinet for preferential heat dissipation is met, the condensation is avoided from the root, and dust and impurities are prevented from entering the cabinet.

Description

Technical Field

[0001] This invention relates to the field of low-voltage power switch technology, and more specifically to a low-voltage power switch with enhanced heat dissipation. Background Technology

[0002] Generally speaking, a low-voltage power cabinet is a power distribution device used in industrial production, building power distribution and other scenarios to provide an installation carrier for various low-voltage electrical equipment and ensure the stable operation of the equipment. During operation, it is necessary to achieve efficient heat dissipation to remove the heat generated by the large current in the copper busbars, circuit breakers, contactors and other components inside the cabinet, so as to avoid the components from overload and aging due to high temperature, and ensure the normal power supply of the low-voltage power system. Heat dissipation is a critical step in the operation of low-voltage power cabinets, as it directly affects the lifespan of the components inside the cabinet and the operational stability of the power distribution system. However, low-voltage power cabinets differ from high-voltage power cabinets. High-voltage power cabinets prioritize insulation and airtightness, with heat dissipation requirements being relatively secondary. In contrast, low-voltage power cabinets must prioritize heat dissipation. Therefore, existing low-voltage power cabinets have all enhanced their heat dissipation design to meet the heat dissipation requirements of high current heating throughout the cabinet. However, in actual operation, the enhanced heat dissipation has brought new problems, especially in summer, particularly during the rainy season, when condensation occurs frequently. Especially when the equipment is shut down at night, the components inside the cabinet lose their continuous heat source, and the temperature drops rapidly. Combined with the enhanced heat dissipation structure, this accelerates the temperature drop inside the cabinet, causing it to quickly fall below the dew point temperature of the ambient air. At this time, when the hot and humid air from outside enters the cabinet, it immediately condenses, forms condensation, and drips upon contact with the cooler metal walls, copper busbars, and component surfaces. These condensed water droplets adhere to the surfaces of electrical components and conductive parts inside the cabinet. Based on this, the present invention aims to provide a low-voltage power cabinet with enhanced heat dissipation that can simultaneously enhance heat dissipation and prevent condensation. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a low-voltage power cabinet with enhanced heat dissipation, thereby solving the technical problems in the prior art.

[0004] The objective of this invention can be achieved through the following technical solutions: A low-voltage power switch with enhanced heat dissipation includes: The cabinet has a door mounted on the front via hinges. A drive assembly is located on the top of the cabinet. Bases are fixedly installed at the four corners of the bottom of the cabinet, which keeps the cabinet off the ground. A lower ventilation opening is provided at the bottom of the cabinet, and a first filter screen is installed at the bottom of the lower ventilation opening. An upper ventilation opening is provided at the top of the cabinet, and a dual-mode axial flow fan is installed inside the upper ventilation opening. When the cabinet is working, the axial flow fan rotates forward to exhaust the air inside the cabinet through the upper ventilation opening. When the cabinet is stopped, the axial flow fan rotates in reverse to deliver external air into the cabinet through the upper ventilation opening. A heat storage component is installed on the top plate inside the cabinet. The heat storage component includes a fixed plate and a phase change heat storage material plate. The fixed plate is fixedly installed on the top plate inside the cabinet, and the phase change heat storage material plate is fixedly installed at the bottom of the fixed plate. When the cabinet is working, the hot air rises and is discharged from the upper vent. The phase change heat storage material plate absorbs and stores the heat from the hot air. When the cabinet is stopped, the phase change heat storage material plate releases the heat. A sliding frame is slidably installed on the top of the cabinet. A second filter screen is fixedly installed on the sliding frame. The sliding frame is driven to move by a drive component. When the cabinet is working, the drive component drives the sliding frame away from the upper ventilation opening, so that the second filter screen is away from the upper ventilation opening. When the cabinet is stopped, the drive component drives the sliding frame closer to the upper ventilation opening, so that the second filter screen covers the upper ventilation opening.

[0005] As a further embodiment of the present invention: the thermal storage component further includes a fixing frame and a honeycomb panel. The fixing frame is wrapped around the phase change thermal storage material plate and is fixedly installed at the bottom of the fixing plate. The fixing frame is in contact with the inner wall of the cabinet. The honeycomb panel is fixedly installed at the bottom of the phase change thermal storage material plate. Both the fixing plate and the fixing frame are made of thermal insulation material.

[0006] As a further embodiment of the present invention: the fixing plate is provided with an installation groove, and a heating plate is fixedly installed in the installation groove. The bottom of the heating plate faces the phase change thermal storage material plate, and a heating wire group is provided at the bottom of the heating plate. A temperature and humidity sensor is provided inside the cabinet. When the temperature and humidity inside the cabinet are lower than the threshold, the heating wire group is activated to heat the phase change thermal storage material plate.

[0007] As a further embodiment of the present invention: the drive assembly includes a slide groove, a reciprocating lead screw and a servo motor. The slide groove is opened on the top of the cabinet. One end of the sliding frame is slidably installed in the slide groove. The reciprocating lead screw is rotatably installed in the slide groove. The reciprocating lead screw is threadedly connected to one end of the sliding frame. The reciprocating lead screw is driven to rotate by the servo motor.

[0008] As a further embodiment of the present invention: a storage groove is provided in the top plate of the cabinet, the storage groove surrounds the upper ventilation opening, and a copper ring is slidably installed in the storage groove. The outer surface of the copper ring is slidably engaged with the inner ring of the phase change thermal storage material plate. The copper ring is driven to rise and fall by a linkage component, which is connected to a sliding frame. When the sliding frame approaches the upper ventilation opening, the sliding frame drives the copper ring to rise through the linkage component, at which time the copper ring is stored in the storage groove. When the sliding frame moves away from the upper ventilation opening, the sliding frame drives the copper ring to fall through the linkage component, at which time the outer surface of the copper ring is in contact with the inner ring of the phase change thermal storage material plate.

[0009] As a further embodiment of the present invention: the linkage assembly includes a lifting frame, a connecting rod, a roller, a wedge block, and a spring. The connecting rod is slidably installed on the top of the cabinet, and its bottom end penetrates the top of the cabinet and extends into the storage slot. The bottom end of the connecting rod is fixedly connected to the top of the copper ring. The lifting frame is fixedly installed on the top of the connecting rod, and its bottom is connected to the top of the cabinet via a spring. The preload of the spring causes the lifting frame to descend. The roller is rotatably installed on the top of the lifting frame. The wedge block is fixedly installed on one side of the sliding frame. The horizontal height of the end of the wedge block near the roller is lower than the horizontal height of the end of the wedge block away from the roller. The wedge block and the roller roll in cooperation.

[0010] As a further aspect of the present invention: two symmetrically arranged limiting baffles are fixedly installed at the bottom of the cabinet, and the first filter screen is slidably installed on the limiting baffles.

[0011] As a further aspect of the present invention: an electric louver assembly is provided inside the lower ventilation opening, and the electric louver assembly adjusts the ventilation volume of the lower ventilation opening.

[0012] The beneficial effects of this invention are: 1. In this invention, the layout design of the bottom ventilation port and the top ventilation port of the cabinet, combined with the forward and reverse switching of the dual-mode axial flow fan, enables the axial flow fan to quickly exhaust the air inside the cabinet and draw in low-temperature air during operation. The heat of the hot airflow is absorbed and stored by the heat storage component. When the machine is stopped, the axial flow fan reverses to draw in warm and dry air from the upper layer. The heat storage component slowly releases heat. At the same time, the sliding frame drives the second filter to switch positions, which, together with the first filter, achieves dual filtration. This not only meets the core requirement of priority heat dissipation of the low-voltage power cabinet, but also prevents the temperature inside the cabinet from falling below the ambient dew point temperature, thus eliminating condensation. At the same time, it prevents dust and impurities from entering the cabinet, ensuring stable operation of the cabinet and avoiding component failures caused by condensation and impurities. 2. In this invention, the heat storage component uses a fixed plate and frame made of heat-insulating material to prevent rapid heat loss. Combined with a honeycomb panel to increase the heat exchange area, it achieves efficient heat storage and uniform heat release. At the same time, the heating plate is linked with the temperature and humidity sensor to actively replenish the heat of the phase change heat storage material plate under extreme low temperature and high humidity weather, forming a heat storage, heat release and heat replenishment anti-condensation system. This significantly improves the anti-condensation reliability of the device under various complex working conditions, which not only meets the priority heat dissipation requirements of the low voltage power cabinet, but also effectively avoids condensation problems and ensures stable operation of the equipment. 3. In this invention, the linkage component and the sliding frame are synchronized. When the sliding frame moves away from the upper ventilation opening, the spring preload pulls the lifting frame down, and the connecting rod drives the copper ring to descend from the storage groove, tightly fitting the inner ring of the phase change thermal storage material plate. Utilizing the excellent thermal conductivity of the copper ring, it quickly absorbs the heat from the rising hot airflow inside the cabinet and transfers it to the phase change thermal storage material plate, significantly improving the thermal storage efficiency. When the sliding frame approaches the upper ventilation opening, the wedge block pushes the roller to roll, causing the lifting frame to rise. The copper ring is stored in the storage groove and separated from the phase change thermal storage material plate, preventing the rapid loss of stored heat when low-temperature air flows through the copper ring at night. This ensures efficient thermal storage during operation and also ensures that the phase change thermal storage material plate slowly releases heat after shutdown, continuously maintaining the cabinet temperature above the ambient dew point temperature. Attached Figure Description

[0013] The invention will now be further described with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure at the bottom of the cabinet in this invention; Figure 3 This is a schematic diagram of the thermal storage component in this invention; Figure 4 This is a schematic diagram of the disassembled thermal storage component in this invention; Figure 5 This is a schematic diagram of the structure of the second filter screen covering the ventilation opening in this invention; Figure 6 In this invention Figure 5 Enlarged structural diagram of part A in the middle; Figure 7 This is a cross-sectional structural diagram of the cabinet in this invention. Figure 8 In this invention Figure 7 Enlarged structural diagram of part B Figure 9 This is a schematic diagram of the structure of the wedge block and roller in this invention.

[0015] In the diagram: 1. Cabinet body; 101. Storage slot; 2. Cabinet door; 3. Base; 4. Lower vent; 5. Upper vent; 6. Axial flow fan; 7. Thermal storage component; 701. Fixing plate; 702. Phase change thermal storage material plate; 703. Fixing frame; 704. Honeycomb panel; 705. Mounting slot; 8. Heating plate; 801. Heating wire assembly; 9. Copper ring; 10. First filter screen; 11. Limiting baffle; 12. Sliding frame; 13. Second filter screen; 14. Slide groove; 15. Reciprocating lead screw; 16. Servo motor; 17. Lifting frame; 18. Connecting rod; 19. Roller; 20. Wedge block; 21. Spring; 22. Electric louver assembly. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1-9 As shown, the present invention is a low-voltage power cabinet with enhanced heat dissipation, comprising: Cabinet 1, with cabinet door 2 mounted on the front via hinges, a drive assembly on the top of cabinet 1, and bases 3 fixedly mounted at the four corners of the bottom of cabinet 1, the bases 3 keeping cabinet 1 off the ground, a lower ventilation opening 4 at the bottom of cabinet 1, a first filter screen 10 at the bottom of the lower ventilation opening 4, and an upper ventilation opening 5 at the top of cabinet 1, with a dual-mode axial flow fan 6 installed inside the upper ventilation opening 5. When cabinet 1 is working, the axial flow fan 6 rotates forward to exhaust air from inside cabinet 1 through the upper ventilation opening 5, and when cabinet 1 is stopped, the axial flow fan 6 rotates in reverse to deliver external air into cabinet 1 through the upper ventilation opening 5. A heat storage component 7 is installed on the top plate inside the cabinet 1. The heat storage component 7 includes a fixing plate 701 and a phase change heat storage material plate 702. The fixing plate 701 is fixedly installed on the top plate inside the cabinet 1, and the phase change heat storage material plate 702 is fixedly installed at the bottom of the fixing plate 701. When the cabinet 1 is working, the hot air rises and is discharged from the upper vent 5. The phase change heat storage material plate 702 absorbs and stores the heat from the hot air. When the cabinet 1 is stopped, the phase change heat storage material plate 702 releases the heat. A sliding frame 12 is slidably installed on the top of the cabinet 1. A second filter screen 13 is fixedly installed on the sliding frame 12. The sliding frame 12 is driven to move by a drive assembly. When the cabinet 1 is working, the drive assembly drives the sliding frame 12 away from the upper ventilation opening 5, so that the second filter screen 13 is away from the upper ventilation opening 5. When the cabinet 1 is stopped, the drive assembly drives the sliding frame 12 closer to the upper ventilation opening 5, so that the second filter screen 13 covers the upper ventilation opening 5.

[0018] Cabinet 1 is a low-voltage power cabinet.

[0019] In one embodiment, it should be noted that the axial flow fan 6 and the phase change thermal storage material plate 702 described in this invention are both prior art. This invention does not improve them. Therefore, it is not necessary to disclose their specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0020] It is important to note that Cabinet 1 has two states: working and shutdown. During the day, most factories, workshops, and production lines are operating at full capacity, with machines, motors, frequency converters, lighting, and equipment all running. At this time, Cabinet 1 is in working condition, and all low-voltage power cabinets, incoming line cabinets, distribution cabinets, and control cabinets at the back end are operating normally. The copper busbars, circuit breakers, and components inside the cabinet generate a lot of heat due to the large current. At night, when factories stop production, work stops, or the entire production line stops, all low-voltage power cabinets, incoming line cabinets, distribution cabinets, and control cabinets at the back end also stop. There is no load current, and the copper busbars, circuit breakers, and components inside Cabinet 1 no longer generate heat. The metal walls of Cabinet 1 and the internal components cool down rapidly. In addition, during the rainy season, the air is extremely humid at night, and the water vapor level is extremely high. The cold metal will directly condense and form water droplets when it comes into contact with the high humidity air, which can lead to the failure of the components inside the cabinet.

[0021] The working principle of this invention is as follows: The lower vent 4 is located at the bottom of the cabinet 1, and the upper vent 5 is located at the top of the cabinet 1. Utilizing the physical principle that cold air sinks and hot air rises, during daytime operation of the cabinet 1, the axial flow fan 6 is controlled to rotate forward, rapidly expelling air from the cabinet 1 through the upper vent 5. Low-temperature ambient air near the ground is drawn into the cabinet 1 through the lower vent 4. As the air rises, it flows past various components such as copper busbars and circuit breakers within the cabinet, carrying away the heat generated by these components and converting it into hot air. When the hot air accumulates at the top of the cabinet 1, the heat is absorbed and stored by the phase change heat storage material plate 702 of the heat storage component 7. The stored heat is far higher than the exposed ambient air temperature. The hot air is then discharged from the upper vent 5 to achieve efficient heat dissipation and meet the priority heat dissipation requirements of the low-voltage power cabinet. When the cabinet 1 is stopped, the axial flow fan 6 is controlled to change direction and draw relatively warm and dry air from the upper part of the cabinet 1 through the upper vent 5 and deliver it into the cabinet 1. After the air in the cabinet 1 reaches saturation, it is slowly discharged through the lower vent 4. As the ambient temperature decreases at night, when the ambient air temperature is lower than the heat stored in the heat storage component 7, the phase change heat storage material plate 702 begins to slowly release heat, thereby maintaining the temperature inside the cabinet 1 and preventing the temperature inside the cabinet 1 from falling below the ambient air dew point temperature, thus eliminating condensation at the source. Furthermore, the second filter 13 can cover the upper ventilation port 5 when the axial fan 6 reverses and air enters from the upper ventilation port 5. Together with the first filter 10 of the lower ventilation port 4, it can ensure that the ambient air entering the cabinet 1 can be filtered when air enters the cabinet, preventing dust and impurities from entering the cabinet and avoiding impurities from adhering to the surface of components and affecting operation. At the same time, it reduces the risk of impurities mixing with condensed water droplets to form conductive sludge, further ensuring the stable operation of the cabinet 1.

[0022] like Figures 1-4 As shown, in a preferred embodiment of the present invention, the heat storage component 7 further includes a fixing frame 703 and a honeycomb panel 704. The fixing frame 703 is wrapped around the phase change heat storage material plate 702. The fixing frame 703 is fixedly installed at the bottom of the fixing plate 701. The fixing frame 703 is in contact with the inner wall of the cabinet 1. The honeycomb panel 704 is fixedly installed at the bottom of the phase change heat storage material plate 702. Both the fixing plate 701 and the fixing frame 703 are made of heat insulation material.

[0023] In practical application, the fixing plate 701 and fixing frame 703 are made of heat-insulating material, which can prevent the phase change heat storage material plate 702 from directly contacting the cabinet wall of the cabinet 1. Because the cabinet wall of the cabinet 1 is made of metal, its cooling rate is much greater than the cooling rate of the ambient temperature. By blocking the fixing plate 701 and fixing frame 703, the heat stored in the phase change heat storage material plate 702 can be effectively prevented from being quickly absorbed by the cabinet wall, ensuring that the phase change heat storage material plate 702 can uniformly absorb and release heat through the honeycomb plate 704. When cabinet 1 is working, hot air rises to the top, and the honeycomb panel 704 increases the contact area with the hot air, enabling the phase change thermal storage material plate 702 to quickly and evenly absorb the heat of the hot air, thereby improving the thermal storage efficiency and effect. When cabinet 1 is stopped, the honeycomb panel 704 allows the heat released by the phase change thermal storage material plate 702 to be evenly diffused to all areas inside cabinet 1, avoiding condensation caused by localized low temperatures, and extending the heat release time to ensure that the temperature inside cabinet 1 can be continuously maintained above the ambient air dew point temperature.

[0024] like Figures 1-4 As shown, in a preferred embodiment of the present invention, the fixing plate 701 is provided with an installation groove 705, and a heating plate 8 is fixedly installed in the installation groove 705. The bottom of the heating plate 8 faces the phase change thermal storage material plate 702, and a heating wire group 801 is provided at the bottom of the heating plate 8. A temperature and humidity sensor is provided in the cabinet 1. When the temperature and humidity in the cabinet 1 are lower than the threshold, the heating wire group 801 is activated to heat the phase change thermal storage material plate 702.

[0025] In one embodiment, it should be noted that the heating wire assembly 801 and the temperature and humidity sensor described in this invention are both prior art. This invention does not improve them. Therefore, it is not necessary to disclose their specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0026] In practical application, this embodiment takes into account the long nights during the summer rainy season and the possibility of extreme low temperature and high humidity. When the passive heat storage of the phase change heat storage material plate 702 is completely released, the cabinet 1 is still in a shutdown state. At this time, the passive heat release of the phase change heat storage material plate 702 alone is not enough to maintain the temperature inside the cabinet 1 above the ambient air dew point temperature, and condensation is very likely to occur. The temperature and humidity data inside the cabinet 1 are monitored in real time by temperature and humidity sensors. When the temperature inside the cabinet 1 is lower than the ambient air dew point temperature and the humidity is higher than the preset threshold, the heating wire group 801 on the heating plate 8 is automatically triggered to start. The heat generated by the heating wire group 801 is transferred to the phase change thermal storage material plate 702 to actively heat the phase change thermal storage material plate 702, replenish the heat stored in the phase change thermal storage material plate 702, and ensure that the phase change thermal storage material plate 702 can continuously release heat to maintain the temperature stability inside the cabinet 1. When the temperature and humidity sensors detect that the temperature and humidity inside the cabinet 1 have returned to the safe threshold, the heating wire group 801 is automatically controlled to turn off to avoid overheating and energy waste, and at the same time to prevent the temperature inside the cabinet 1 from being too high and affecting the performance of the components inside the cabinet. Through this automatic control method, the condensation problem caused by insufficient heat of the phase change thermal storage material plate 702 under extreme weather conditions is solved, further improving the anti-condensation reliability of the device and ensuring that the cabinet 1 can operate stably under various complex working conditions.

[0027] like Figures 1-5As shown, in a preferred embodiment of the present invention, the drive assembly includes a slide groove 14, a reciprocating lead screw 15, and a servo motor 16. The slide groove 14 is formed on the top of the cabinet 1. One end of the sliding frame 12 is slidably installed in the slide groove 14. The reciprocating lead screw 15 is rotatably installed in the slide groove 14. The reciprocating lead screw 15 is threadedly connected to one end of the sliding frame 12. The reciprocating lead screw 15 is driven to rotate by the servo motor 16.

[0028] In practical application, when cabinet 1 is in operation, the axial fan 6 needs to rotate forward for efficient exhaust and heat dissipation. At this time, the servo motor 16 starts, driving the reciprocating screw 15 to rotate clockwise. Through the threaded engagement between the reciprocating screw 15 and the sliding frame 12, the sliding frame 12 is driven to slide along the slide groove 14 away from the upper ventilation opening 5, so that the second filter screen 13 moves away from the upper ventilation opening 5 simultaneously. This prevents the second filter screen 13 from blocking the exhaust of hot air, ensuring that the exhaust efficiency of the axial fan 6 is not affected and guaranteeing the heat dissipation effect. When cabinet 1... When the machine is in a stopped state, the axial flow fan 6 needs to reverse to draw in external air, and the second filter screen 13 needs to filter the air. At this time, the servo motor 16 starts in reverse and drives the reciprocating screw 15 to rotate counterclockwise. Through the threaded engagement, the sliding frame 12 slides along the slide groove 14 towards the upper ventilation port 5 until the second filter screen 13 completely covers the upper ventilation port 5, thereby filtering the drawn-in air. This ensures that the cabinet 1 does not affect the heat dissipation efficiency and can guarantee the cleanliness of the intake air under both working conditions, indirectly reducing the risk of failure caused by condensation.

[0029] like Figures 1-8 As shown in a preferred embodiment of the present invention, the cabinet 1 has a storage groove 101 on its inner top plate, which surrounds the upper ventilation opening 5. A copper ring 9 is slidably installed in the storage groove 101. The outer surface of the copper ring 9 is slidably engaged with the inner ring of the phase change heat storage material plate 702. The copper ring 9 is driven to rise and fall by a linkage component, which is connected to a sliding frame 12. When the sliding frame 12 approaches the upper ventilation opening 5, the sliding frame 12 drives the copper ring 9 to rise through the linkage component, at which time the copper ring 9 is stored in the storage groove 101. When the sliding frame 12 moves away from the upper ventilation opening 5, the sliding frame 12 drives the copper ring 9 to fall through the linkage component, at which time the outer surface of the copper ring 9 is in contact with the inner ring of the phase change heat storage material plate 702.

[0030] In practical application, the copper ring 9 is made of copper with excellent thermal conductivity, which can quickly conduct heat. The copper ring 9 is located near the upper ventilation opening 5. When the cabinet 1 is in operation, the sliding frame 12, driven by the drive assembly, moves away from the upper ventilation opening 5. The sliding frame 12, through the linkage assembly, drives the copper ring 9 to descend from the storage slot 101 until the outer surface of the copper ring 9 is tightly fitted with the inner ring of the phase change heat storage material plate 702. At this time, the hot airflow rises and gathers at the top of the cabinet 1 and is discharged through the upper ventilation opening 5. When the hot airflow flows through the copper ring 9, the copper ring 9 quickly absorbs the heat from the hot airflow and efficiently transfers the absorbed heat to the phase change heat storage material plate 702, significantly improving the heat absorption efficiency and effect of the phase change heat storage material plate 702. This allows the phase change heat storage material plate 702 to store more heat, providing sufficient heat support for anti-condensation after shutdown. When the unit 1 is in the off state, the copper ring 9 rises and is completely stored in the storage groove 101, so that the copper ring 9 is completely separated from the phase change heat storage material plate 702. Since the axial flow fan 6 reverses at night to draw the external ambient air into the unit 1, the drawn ambient air will cause the copper ring 9 to cool down rapidly when it flows through the storage groove 101. If the copper ring 9 continues to be in contact with the phase change heat storage material plate 702, it will quickly absorb the heat stored in the phase change heat storage material plate 702 and dissipate it into the air, causing the phase change heat storage material plate 702 to lose heat too quickly and fail to maintain the anti-condensation requirement throughout the night. After the copper ring 9 is stored in the storage groove 101, it avoids contact with the phase change heat storage material plate 702, prevents the phase change heat storage material plate 702 from losing heat quickly, ensures that the phase change heat storage material plate 702 can release heat slowly, and at the same time takes into account the heat storage efficiency in the working state.

[0031] like Figures 1-9 As shown in a preferred embodiment of the present invention, the linkage assembly includes a lifting frame 17, a connecting rod 18, a roller 19, a wedge block 20, and a spring 21. The connecting rod 18 is slidably installed on the top of the cabinet 1, and the bottom end of the connecting rod 18 passes through the top of the cabinet 1 and extends into the storage slot 101. The bottom end of the connecting rod 18 is fixedly connected to the top of the copper ring 9. The lifting frame 17 is fixedly installed on the top of the connecting rod 18. The bottom of the lifting frame 17 is connected to the top of the cabinet 1 through the spring 21. The preload of the spring 21 causes the lifting frame 17 to descend. The roller 19 is rotatably installed on the top of the lifting frame 17. The wedge block 20 is fixedly installed on one side of the sliding frame 12. The horizontal height of the end of the wedge block 20 near the roller 19 is lower than the horizontal height of the end of the wedge block 20 away from the roller 19. The wedge block 20 and the roller 19 are in rolling cooperation.

[0032] In practical applications, this embodiment, such as Figure 9As shown, when the cabinet 1 is in the working state, the sliding frame 12 is in a position away from the upper ventilation opening 5. At this time, the wedge block 20 is away from the roller 19, and the spring 21 pulls the lifting frame 17 down to the lowest position under the action of the pre-tightening force. The lifting frame 17 drives the copper ring 9 down through the connecting rod 18, so that the copper ring 9 is tightly attached to the phase change heat storage material plate 702. According to Figure 9 The upper dotted line indicates that the horizontal height of the wedge block 20 near the roller 19 is lower than that of the other end, ensuring that when the sliding frame 12 moves the wedge block 20 closer to the roller 19, the roller 19 can smoothly roll on the inclined side of the wedge block 20. When the cabinet 1 stops, the drive assembly drives the sliding frame 12 closer to the upper ventilation opening 5. The sliding frame 12 moves the wedge block 20 toward the roller 19, and the inclined side of the wedge block 20 contacts the roller 19, pushing the roller 19 to roll upward along the inclined side. The roller 19 drives the lifting frame 17 to rise synchronously. The lifting frame 17 stretches the spring 21 and stores elastic potential energy. At the same time, the lifting frame 17 drives the copper ring 9 to rise through the connecting rod 18 until the copper ring 9 is completely retracted into the storage groove 101, realizing the separation of the copper ring 9 from the phase change heat storage material plate 702, preventing the phase change heat storage material plate 702 from losing heat rapidly. The entire linkage process is stable and smooth, without manual intervention, realizing the automatic switching of the position of the copper ring 9 under two working conditions, which not only ensures the heat storage efficiency in the working state, but also ensures the anti-condensation effect in the shutdown state.

[0033] like Figures 1-2 As shown, in a preferred embodiment of the present invention, two symmetrically arranged limiting baffles 11 are fixedly installed at the bottom of the cabinet 1, and the first filter screen 10 is slidably installed on the limiting baffles 11.

[0034] In practical application, the limiting baffle 11 in this embodiment serves to limit and guide the first filter screen 10, such as... Figure 2 As shown, when the first filter 10 is installed in place, it is located below the lower ventilation port 4. It filters the air drawn in through the lower ventilation port 4 when the cabinet 1 is working, preventing dust and impurities from entering the cabinet. When the first filter 10 has been used for a long time and too much dust and impurities have accumulated on its surface, affecting the filtration effect and ventilation efficiency, and it needs to be cleaned, the operator can manually pull the first filter 10 outward along the guide direction of the limiting baffle 11. After cleaning, the first filter 10 can be slid back into place along the limiting baffle 11 to restore the filtration function.

[0035] like Figures 1-2 As shown, in a preferred embodiment of the present invention, an electric louver assembly 22 is provided inside the lower ventilation opening 4, and the electric louver assembly 22 adjusts the ventilation volume of the lower ventilation opening 4.

[0036] In one embodiment of this invention, it should be noted that the electric louver assembly 22 described in this invention is prior art. This invention does not improve upon it. Therefore, it is not necessary to disclose its specific mechanical and circuit structures, and this does not affect the integrity of this invention.

[0037] In practical application, the electric louver assembly 22 is used to flexibly adjust the ventilation volume of the lower vent 4. When the cabinet 1 is working during the day, it needs to enhance heat dissipation. At this time, the electric louver assembly 22 adjusts the louvers to fully open, so that the ventilation volume of the lower vent 4 reaches the maximum, which can draw in more low-temperature ambient air, accelerate the air convection inside the cabinet, improve heat dissipation efficiency, and meet the priority heat dissipation requirements of the low-voltage power cabinet. At night, after the cabinet 1 is shut down, the electric louver assembly 22 adjusts the louvers to close to a small opening, reducing the ventilation volume of the lower vent 4. At this time, the heat released by the heat storage component 7 is mixed with the air inside the cabinet 1 and can be slowly discharged from the lower vent 4, realizing the pressure and back pressure effect inside the cabinet 1, effectively maintaining the temperature stability inside the cabinet 1, and preventing the temperature inside the cabinet 1 from dropping rapidly below the ambient air dew point temperature. Meanwhile, the small opening of the electric louver assembly 22 can reduce the backflow of cold and humid air from the outside into the cabinet 1 through the lower ventilation opening 4, further reducing the risk of condensation.

[0038] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A low-voltage power switch with enhanced heat dissipation, characterized in that, include: Cabinet (1), the front of the cabinet (1) is fitted with a cabinet door (2) by hinges, the top of the cabinet (1) is fitted with a drive assembly, and the four corners of the bottom of the cabinet (1) are fixedly fitted with bases (3), the bases (3) make the cabinet (1) away from the ground, the bottom of the cabinet (1) is provided with a lower ventilation port (4), the bottom of the lower ventilation port (4) is provided with a first filter screen (10), the top of the cabinet (1) is provided with an upper ventilation port (5), the upper ventilation port (5) is provided with a dual-mode axial flow fan (6), when the cabinet (1) is working, the axial flow fan (6) rotates forward to exhaust the air inside the cabinet (1) through the upper ventilation port (5), when the cabinet (1) is stopped, the axial flow fan (6) rotates in reverse to deliver external air into the cabinet (1) through the upper ventilation port (5); The heat storage component (7) is installed on the top plate inside the cabinet (1). The heat storage component (7) includes a fixing plate (701) and a phase change heat storage material plate (702). The fixing plate (701) is fixedly installed on the top plate inside the cabinet (1). The phase change heat storage material plate (702) is fixedly installed at the bottom of the fixing plate (701). When the cabinet (1) is working, the hot air rises and is discharged from the upper vent (5). The phase change heat storage material plate (702) absorbs and stores the heat of the hot air. When the cabinet (1) is stopped, the phase change heat storage material plate (702) releases heat. A sliding frame (12) is slidably installed on the top of the cabinet (1). A second filter screen (13) is fixedly installed on the sliding frame (12). The sliding frame (12) is driven to move by a drive assembly. When the cabinet (1) is working, the drive assembly drives the sliding frame (12) away from the upper ventilation opening (5), so that the second filter screen (13) is away from the upper ventilation opening (5). When the cabinet (1) is stopped, the drive assembly drives the sliding frame (12) closer to the upper ventilation opening (5), so that the second filter screen (13) covers the upper ventilation opening (5).

2. A low-voltage power switch with enhanced heat dissipation according to claim 1, characterized in that, The heat storage component (7) also includes a fixing frame (703) and a honeycomb panel (704). The fixing frame (703) is wrapped around the phase change heat storage material plate (702). The fixing frame (703) is fixedly installed at the bottom of the fixing plate (701). The fixing frame (703) is in contact with the inner wall of the cabinet (1). The honeycomb panel (704) is fixedly installed at the bottom of the phase change heat storage material plate (702). Both the fixing plate (701) and the fixing frame (703) are made of heat insulation material.

3. A low-voltage power switch with enhanced heat dissipation according to claim 1, characterized in that, The fixing plate (701) has an installation groove (705) and a heating plate (8) is fixedly installed in the installation groove (705). The bottom of the heating plate (8) faces the phase change heat storage material plate (702) and a heating wire group (801) is provided at the bottom of the heating plate (8). A temperature and humidity sensor is provided in the cabinet (1). When the temperature and humidity in the cabinet (1) are lower than the threshold, the heating wire group (801) is activated to heat the phase change heat storage material plate (702).

4. A low-voltage power switch with enhanced heat dissipation according to claim 1, characterized in that, The drive assembly includes a slide groove (14), a reciprocating screw (15), and a servo motor (16). The slide groove (14) is located on the top of the cabinet (1). One end of the sliding frame (12) is slidably installed in the slide groove (14). The reciprocating screw (15) is rotatably installed in the slide groove (14). The reciprocating screw (15) is threadedly connected to one end of the sliding frame (12). The reciprocating screw (15) is driven to rotate by the servo motor (16).

5. A low-voltage power switch with enhanced heat dissipation according to claim 1, characterized in that, The cabinet (1) has a storage groove (101) on the top plate. The storage groove (101) surrounds the upper ventilation opening (5). A copper ring (9) is slidably installed in the storage groove (101). The outer surface of the copper ring (9) is slidably engaged with the inner ring of the phase change heat storage material plate (702). The copper ring (9) is driven to rise and fall by a linkage component. The linkage component is connected to the sliding frame (12). When the sliding frame (12) is close to the upper ventilation opening (5), the sliding frame (12) drives the copper ring (9) to rise through the linkage component. At this time, the copper ring (9) is stored in the storage groove (101). When the sliding frame (12) is away from the upper ventilation opening (5), the sliding frame (12) drives the copper ring (9) to fall through the linkage component. At this time, the outer surface of the copper ring (9) is in contact with the inner ring of the phase change heat storage material plate (702).

6. A low-voltage power switch with enhanced heat dissipation according to claim 5, characterized in that, The linkage assembly includes a lifting frame (17), a connecting rod (18), a roller (19), a wedge block (20), and a spring (21). The connecting rod (18) is slidably installed on the top of the cabinet (1). The bottom end of the connecting rod (18) passes through the top of the cabinet (1) and extends into the storage slot (101). The bottom end of the connecting rod (18) is fixedly connected to the top of the copper ring (9). The lifting frame (17) is fixedly installed on the top of the connecting rod (18). The bottom of the lifting frame (17) The part is connected to the top of the cabinet (1) by a spring (21). The preload of the spring (21) causes the lifting frame (17) to descend. The roller (19) is rotatably installed on the top of the lifting frame (17). The wedge block (20) is fixedly installed on one side of the sliding frame (12). The horizontal height of the end of the wedge block (20) near the roller (19) is lower than the horizontal height of the end of the wedge block (20) away from the roller (19). The wedge block (20) and the roller (19) roll together.

7. A low-voltage power switch with enhanced heat dissipation according to claim 1, characterized in that, The cabinet (1) has two symmetrically arranged limiting baffles (11) fixedly installed at the bottom, and the first filter screen (10) is slidably installed on the limiting baffles (11).

8. A low-voltage power switch with enhanced heat dissipation according to claim 1, characterized in that, An electric louver assembly (22) is provided inside the lower ventilation opening (4), and the electric louver assembly (22) adjusts the ventilation volume of the lower ventilation opening (4).

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