High-efficiency heat dissipation type alternating current low-voltage power distribution cabinet

Abstract

This invention discloses a high-efficiency heat dissipation AC low-voltage distribution cabinet, belonging to the field of distribution cabinets. The high-efficiency heat dissipation AC low-voltage distribution cabinet includes a fixed frame, which is fixedly connected to the cabinet body. There are two fixed frames, and two side frames and two trapezoidal frames are arranged on opposite sides of the two fixed frames. The two side frames and trapezoidal frames are alternately arranged to form a quadrilateral. A middle plate is fixedly connected at the interval between the two side frames. A vertical plate is fixedly connected to the top center of the middle plate. A V-shaped plate is fixedly connected to the top of the vertical plate. A retaining plate is fixedly connected to the side of the side frame near the middle plate. The ventilation component consists of the fixed frame, side frames, and trapezoidal frames forming the basic framework. The U-shaped middle plates are evenly arranged, and their inclined edges near the vertical plates guide airflow smoothly, achieving a flow-guiding structure between the vertical plates and the V-shaped plates. This prevents airflow backflow at the ventilation openings and improves the exchange efficiency between airflow and external air.

Description

Technical Field

[0001] This invention relates to a high-efficiency heat dissipation AC low-voltage distribution cabinet, and pertains to the field of distribution cabinets. Background Technology

[0002] As a core infrastructure device in power systems for power distribution, control, and energy conversion, low-voltage AC switchgear is widely used in various scenarios such as industrial production, commercial buildings, and residential buildings. It undertakes the functions of distributing, protecting, and controlling low-voltage electrical energy, and its operational stability directly affects the safety and reliability of the entire power supply system. With the development of power electronics technology, the power density of various electrical devices is constantly increasing. This has led to an increase in the number and more compact arrangement of components such as circuit breakers, contactors, busbars, and relays integrated within the switchgear, resulting in the continuous generation of a large amount of heat during operation.

[0003] In the prior art, such as a low-voltage distribution cabinet with heat dissipation and dust removal function with patent number CN110544889B, the fans on both sides of the two side frames of the equipment simultaneously draw air, dissipate heat and remove dust inside the cabinet. The air and dust are discharged from several ventilation sleeves set at the same height, which increases the airflow velocity inside the cabinet and greatly improves the efficiency and comprehensiveness of the fans in heat dissipation and dust removal inside the cabinet. However, due to the simple design of the ventilation channels, the flow of cold air inside the cabinet is obstructed, and it cannot fully contact all heat-generating components, especially in high-heat-generating areas such as busbars. Due to insufficient heat exchange, heat accumulation areas are easily formed. Under high-load conditions, the temperature inside the cabinet can easily exceed the safe operating range of the components. In addition, in order to ensure the heat dissipation effect, some distribution cabinets keep the fans running continuously for a long time. Even under normal operating conditions of low load and low temperature, they still maintain high power operation, resulting in a lot of energy waste. At the same time, the long-term operation of the fans will increase mechanical wear, shorten the service life of the equipment, and generate continuous noise pollution. Furthermore, the installation spacing and layout cannot be flexibly adjusted, making it difficult to adapt to different specifications and quantities of distribution components. Summary of the Invention

[0004] To address the aforementioned problems, this invention discloses a high-efficiency heat dissipation AC low-voltage distribution cabinet, comprising a cabinet body and a base fixedly installed at the bottom of the cabinet body. The base has multiple square holes on its outer side, which are evenly distributed on the four sides of the base. A cabinet door is hinged to the front end of the cabinet body, a fan is fixedly connected to the rear end of the cabinet body, and a protective cover is fixedly connected to the outer side of the cabinet body near the fan. Ventilation components are fixedly installed on the side of the cabinet away from the base. The ventilation component includes two fixed frames, each with a side border and a trapezoidal frame on opposite sides. These frames are arranged alternately to form a quadrilateral. A middle plate is fixedly connected between the two side borders. The ventilation component's basic framework consists of the fixed frames, side borders, and trapezoidal frames. The U-shaped middle plates are evenly arranged, and their sloping edges near the uprights guide airflow smoothly. The uprights and V-shaped plates form a flow-guiding structure, preventing airflow backflow at the ventilation openings. Pairs of V-shaped clips on the side borders are positioned between the middle plate and the V-shaped plates. It can both divert the airflow and improve the exchange efficiency between the airflow and the outside air, and block some dust and foreign objects from entering the cabinet, achieving a balance between dust prevention and ventilation. There are multiple middle panels, which are evenly arranged on the frame. A vertical panel is fixedly connected to the top center of the middle panel, and a V-shaped panel is fixedly connected to the top of the vertical panel. The middle panel is U-shaped, and the edge of the middle panel near the vertical panel is inclined. A card plate is fixedly connected to the side of the frame near the middle panel. The card plate is V-shaped, and there are multiple card plates. Two card plates are grouped together, and the two card plates in a group are located inside between the middle panel and the V-shaped panel.

[0005] Furthermore, the cabinet includes a shell, the bottom of which is fixedly connected to the top of the base. A square plate is fixedly connected to the inner wall of the shell, dividing the interior of the shell into two parts: the upper part is a heat dissipation cavity, and the lower part is used to install electronic components. A square groove is formed on the outer side of the shell away from the base, and a through hole is formed at the bottom of the shell, forming an air intake channel with the square hole in the base. This allows cold air from outside to be directly introduced into the core area of ​​the cabinet, providing continuous cold air supply to the power distribution components. Through grooves are formed between the square plates on the inner wall of the shell, and slots are evenly formed on the trapezoidal blocks on the inner plate below the square plates. These structures allow cold air to circulate unimpeded horizontally and vertically within the cabinet, fully contacting each power distribution component, carrying away operating heat, achieving heat dissipation without dead corners inside the cabinet, and preventing heat buildup due to component accumulation. The structure forms a heat accumulation zone by shielding the airflow. A square groove runs completely through the shell along the direction of the square plate. A fixing frame is located inside the square groove, and the square plate is positioned below it. A heat dissipation plate is fixedly connected to the top of the square plate, closely adhering to the top busbar area of ​​the inner shell to absorb heat conducted through the busbar. When cold air passes vertically through the staggered holes in the heat dissipation plate, turbulence is created, extending the heat exchange path and effectively removing heat from the busbar. There are multiple heat dissipation plates, evenly distributed on the square plate. Circular holes are opened on the outer side of each heat dissipation plate, penetrating it. The heat dissipation plates are perpendicular to the square plates. Through slots are opened on the outer side of each square plate, located at the intervals between adjacent square plates. A guide shroud is fixedly connected to the inner wall of the shell near the fan end. This guide shroud can directionally guide the hot air inside the cabinet, causing it to converge along a fixed path. To prevent airflow turbulence from reducing exhaust efficiency at the fan location, and to ensure hot air is quickly extracted by the fan, shortening its residence time inside the cabinet, the shell contains two inner panels symmetrically arranged inside the shell, located below the square panel. An adjustment assembly is located between the two inner panels, with both ends of the assembly slidably connected to the two inner panels. A limit block is fixedly connected to the side of the inner panel away from the adjustment assembly. A side block is fixedly connected to the inner wall of the shell. A buffer block is located at the end of the limit block away from the inner panel. Extension blocks are fixedly connected to both ends of the buffer block, and spring plates are fixedly connected to the end of the extension block away from the buffer block. The spring plates at both ends of the buffer block are fixedly connected to the side block and the limit block, respectively. The limit block and the side block are connected by spring plates. The extension block connects to the buffer block, forming an elastic buffer structure. When the cabinet is subjected to external vibration or slight deformation, the buffer block absorbs the impact force, and the elastic plate further buffers the vibration by undergoing elastic deformation, preventing the vibration from being directly transmitted to the inner panel and the electrical components installed inside the cabinet. At the same time, the limit block restricts the movement range of the buffer structure to prevent excessive deformation from causing structural damage. A trapezoidal block is fixedly connected to the end of the inner panel away from the limit block. The outer side of the trapezoidal block has a slot. There are multiple trapezoidal blocks, which are evenly arranged on the inner panel. There are also multiple slots, which are evenly arranged on the trapezoidal blocks. A through hole is opened at the bottom of the shell, and a discharge chute is opened below the shell near the ventilation component. A small amount of dust that enters the cabinet during ventilation can be discharged through the discharge chute.To prevent dust accumulation from affecting component heat dissipation.

[0006] Furthermore, the adjustment component includes a middle frame with two trapezoidal side slots at the center of each end. The two side slots are symmetrically arranged around the middle frame. A locking groove is located on the outer side of the middle frame. When the middle frame is pushed, the positioning block is pressed by the inclined surface of the trapezoidal block, causing the connecting column to slide inward along the groove, compressing the spring. When the middle frame moves to the target position, the spring returns to its original position, pushing the positioning block into the slot of the trapezoidal block, thus fixing the position of the adjustment component. Multiple sets of symmetrical locking grooves are provided on the middle frame for securing and fixing electrical components. The two ends of the adjustment component are slidably connected to two symmetrical inner plates inside the cabinet, allowing for free lateral movement along the inner plates. Simultaneously, the positioning block of the adjustment component itself cooperates with the multiple slots of the trapezoidal block to achieve multi-level fixed positioning, which can be adjusted according to the power distribution... The specifications, quantity, and installation layout requirements of the components can be flexibly adjusted to adjust the installation position and spacing, adapting to low-voltage power distribution components of different models and arrangements, improving the adaptability and versatility of the cabinet, eliminating the need to replace the cabinet due to changes in component specifications, and reducing usage costs. There are multiple slots, divided into two groups, with the two groups of slots arranged symmetrically vertically. One group of slots is evenly arranged on the middle frame. There are two sliding grooves on the outer side of the middle frame, located at both ends of the middle frame in the vertical direction. A connecting post is slidably connected to the end of the middle frame near the trapezoidal block. A positioning block is fixedly connected to the end of the connecting post near the trapezoidal block, with two positioning blocks symmetrically arranged around the middle frame. A spring is installed on the outer side of the connecting post, with both ends of the spring fixedly connected to the positioning block and the sliding groove, respectively.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: (I) This high-efficiency heat dissipation AC low-voltage distribution cabinet has a ventilation component consisting of a fixed frame, a side frame, and a trapezoidal frame as the basic frame. The U-shaped middle plates are evenly arranged, and their inclined edges near the uprights can guide the airflow smoothly. This achieves a flow guiding structure between the uprights and the V-shaped plates, preventing the airflow from flowing back at the ventilation openings. The V-shaped plates on the side frame are arranged in pairs between the middle plate and the V-shaped plates. This can not only divert the airflow and improve the exchange efficiency between the airflow and the outside air, but also block some dust and foreign objects from entering the cabinet, achieving a balance between dust prevention and ventilation.

[0008] (ii) This high-efficiency heat dissipation AC low-voltage distribution cabinet has through holes at the bottom of the shell, which together with the square holes of the base form an air intake channel, allowing cold air to circulate freely in the horizontal and vertical directions inside the cabinet, fully contacting each power distribution component, carrying away the working heat, achieving heat dissipation without dead corners inside the cabinet, and avoiding heat accumulation areas caused by component accumulation and structural obstruction.

[0009] (III) The high-efficiency heat dissipation AC low-voltage distribution cabinet has a flow guide shroud that can guide the hot air inside the cabinet in a directional manner, so that the hot air can be gathered along a fixed path to the fan, avoiding the reduction of exhaust efficiency caused by airflow turbulence, and at the same time allowing the hot air to be quickly drawn out by the fan, shortening the residence time of the hot air inside the cabinet.

[0010] (iv) The high-efficiency heat dissipation AC low-voltage distribution cabinet has a buffer block connected between the limit block and the side block through a spring plate and an extension block to form an elastic buffer structure. When the cabinet is subjected to external vibration or slight deformation, the buffer block absorbs the vibration impact force, and the spring plate undergoes elastic deformation to further buffer, thus preventing the vibration from being directly transmitted to the inner panel and the power distribution components installed inside the cabinet. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural schematic diagram of another side view of the present invention; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the ventilation component of the present invention; Figure 5 This is a partial structural schematic diagram of the ventilation component of the present invention; Figure 6 This is a schematic diagram of a partial structure of the cabinet of the present invention; Figure 7 This is a schematic diagram of a partial structure of the cabinet of the present invention; Figure 8 This is a cross-sectional structural diagram of the cabinet of the present invention; Figure 9 For the present invention Figure 8 A structural schematic diagram of the enlarged view at point A in the middle; Figure 10 This is a schematic diagram of the structure of the adjustment component of the present invention; Figure 11 This is a partial structural schematic diagram of the adjustment component of the present invention.

[0012] In the diagram: 1. Base; 2. Cabinet; 21. Shell; 22. Square plate; 23. Heat sink; 24. Round hole; 25. Inner panel; 26. Adjustment assembly; 261. Middle frame; 262. Side groove; 263. Slot; 264. Slide; 265. Positioning block; 266. Spring; 267. Connecting column; 27. Through hole; 28. Discharge groove; 29. ​​Through groove; 210. Square groove; 21. 1. Trapezoidal block; 212. Flow guide; 213. Side block; 214. Groove; 215. Spring plate; 216. Limiting block; 217. Buffer block; 218. Extension block; 3. Cabinet door; 4. Ventilation assembly; 41. Fixing frame; 42. Frame; 43. Trapezoidal frame; 44. Middle plate; 45. V-shaped plate; 46. Vertical plate; 47. Card plate; 5. Fan; 6. Protective cover; 7. Square hole. Detailed Implementation

[0013] Example 1, as Figures 1 to 5 As shown, this embodiment discloses a high-efficiency heat dissipation type AC low-voltage distribution cabinet, including a cabinet body 2 and a base 1 fixedly installed at the bottom of the cabinet body 2. The outer side of the base 1 is provided with square holes 7. There are multiple square holes 7, which are evenly distributed on the four sides of the base 1. The front end of the cabinet body 2 is hinged to a cabinet door 3. The rear end of the cabinet body 2 is fixedly connected to a fan 5. The outer side of the cabinet body 2 near the fan 5 is fixedly connected to a protective cover 6. Ventilation component 4 is fixedly installed on the side of the cabinet 2 away from the base 1. The ventilation component 4 includes a fixed frame 41, which is fixedly connected to the cabinet 2. There are two fixed frames 41. A side frame 42 and a trapezoidal frame 43 are provided on opposite sides of the two fixed frames 41. There are two side frames 42 and trapezoidal frames 43, which are alternately arranged to form a quadrilateral. A middle plate 44 is fixedly connected between the two side frames 42. The ventilation component 4 is based on the fixed frame 41, side frame 42, and trapezoidal frame 43. The U-shaped middle plates 44 are evenly arranged, and their inclined edges near the upright plate 46 guide airflow smoothly. The upright plate 46 and the V-shaped plate 45 form a guide structure to prevent airflow backflow at the ventilation opening. V-shaped plates 47 on the side frame 42 are paired on the middle plate 44 and the V-shaped plate 45. Between the panels 45, the airflow can be diverted to improve the efficiency of airflow exchange with the outside air, and some dust and foreign objects can be blocked from entering the cabinet, achieving a balance between dust prevention and ventilation. There are multiple intermediate panels 44, which are evenly arranged on the frame 42. A vertical panel 46 is fixedly connected to the top center of the intermediate panel 44, and a V-shaped panel 45 is fixedly connected to the top of the vertical panel 46. The intermediate panel 44 is U-shaped, and the edge of the intermediate panel 44 near the vertical panel 46 is inclined. A card plate 47 is fixedly connected to the side of the frame 42 near the intermediate panel 44. The card plate 47 is V-shaped, and there are multiple card plates 47. Two card plates 47 are grouped together, and the two card plates 47 in a group are located inside between the intermediate panel 44 and the V-shaped panel 45.

[0014] Example 2, based on Example 1, combined with... Figures 6 to 9It can be seen that the cabinet 2 includes a shell 21, the bottom of which is fixedly connected to the top of the base 1. A square plate 22 is fixedly connected to the inner wall of the shell 21, which divides the interior of the shell 21 into two parts: the upper part is a heat dissipation cavity, and the lower part is used to install electronic components. A square groove 210 is opened on the outer side of the shell 21 away from the base 1. A through hole 27 is opened at the bottom of the shell 21, which forms an air intake channel with the square hole 7 of the base 1, allowing cold air from the outside to be directly introduced into the core area of ​​the cabinet 2, providing continuous cold air supply for the power distribution components. A through groove 29 is opened between the square plates 22 on the inner wall of the shell 21. The trapezoidal blocks 211 on the inner plate 25 below the square plates 22 have evenly spaced slots 214. These structures allow cold air to flow horizontally without obstruction inside the cabinet. The vertical flow ensures full contact with all electrical components, carrying away working heat and achieving heat dissipation without dead corners inside the cabinet. This avoids heat accumulation areas caused by component stacking or structural obstruction. The square channel 210 completely penetrates the shell 21 along the direction of the square plate 22. The fixing frame 41 is located inside the square channel 210, and the square plate 22 is located below the square channel 210. A heat dissipation plate 23 is fixedly connected to the top of the square plate 22. The heat dissipation plate is in close contact with the busbar area at the top of the inner shell, absorbing the heat conducted by the busbar. When the cold air passes vertically through the staggered holes of the heat dissipation plate, it forms turbulence, extending the heat exchange path and fully carrying away the heat from the busbar. There are multiple heat dissipation plates 23, which are evenly distributed on the square plate 22. Circular holes 24 are opened on the outer side of the heat dissipation plate 23, penetrating the heat dissipation plate 23. The heat dissipation plate 23 and the square plate... The square plate 22 is vertically arranged, and a through groove 29 is opened on the outer side of the square plate 22. The through groove 29 is located at the interval between two adjacent square plates 22. A guide hood 212 is fixedly connected to the inner wall of the housing 21 near the fan 5. The guide hood 212 can guide the hot air inside the cabinet 2 in a specific direction, so that the hot air converges to the fan 5 along a fixed path, avoiding airflow turbulence that would reduce exhaust efficiency. At the same time, it allows the hot air to be quickly extracted by the fan 5, shortening the residence time of the hot air inside the cabinet 2. The housing 21 has two inner plates 25, which are symmetrically arranged inside the housing 21 and located below the square plate 22. An adjustment component 26 is provided at the interval between the two inner plates 25. The end is slidably connected to two inner plates 25. A limit block 216 is fixedly connected to the side of the inner plate 25 away from the adjustment component 26. A side block 213 is fixedly connected to the inner wall of the shell 21. A buffer block 217 is provided at the end of the limit block 216 away from the inner plate 25. An extension block 218 is fixedly connected to both ends of the buffer block 217. A spring plate 215 is fixedly connected to the end of the extension block 218 away from the buffer block 217. The spring plates 215 at both ends of the buffer block 217 are fixedly connected to the side block 213 and the limit block 216, respectively. The limit block 216 and the side block 213 are connected to the buffer block 217 through the spring plate 215 and the extension block 218, forming an elastic buffer structure. When the cabinet 2 is subjected to external vibration or slight deformation, the buffer block 217 absorbs the vibration impact force.The elastic plate 215 undergoes further cushioning during elastic deformation, preventing vibrations from being directly transmitted to the inner plate 25 and the electrical components installed inside the cabinet 2. Simultaneously, the limiting block 216 restricts the movement range of the cushioning structure, preventing excessive deformation and structural damage. A trapezoidal block 211 is fixedly connected to the end of the inner plate 25 away from the limiting block 216. The outer side of the trapezoidal block 211 has a slot 214. Multiple trapezoidal blocks 211 are evenly arranged on the inner plate 25. Multiple slots 214 are also evenly arranged on the trapezoidal blocks 211. A through hole 27 is provided at the bottom of the housing 21. A discharge groove 28 is provided below the housing 21 near the ventilation component 4. A small amount of dust entering the cabinet 2 during ventilation can be discharged through the discharge groove 28, preventing dust accumulation from affecting component heat dissipation.

[0015] Example 3, based on Examples 1 and 2, combined with... Figures 10 to 11It can be seen that the adjustment component 26 includes a middle frame 261, and a side groove 262 is provided at the middle of the end of the middle frame 261. The side groove 262 is trapezoidal and there are two side grooves 262. The two side grooves 262 are symmetrically arranged with the middle frame 261 as the center. A slot 263 is provided on the outer side of the middle frame 261. When the middle frame 261 is pushed, the positioning block 265 is squeezed by the inclined surface of the trapezoidal block 211, which drives the connecting column 267 to slide inward along the slide groove 264. The spring 266 is compressed. When the middle frame 261 moves to the target position... When set, spring 266 returns to its original position, pushing positioning block 265 into slot 214 of trapezoidal block 211, thus fixing the position of adjustment component 26. Multiple sets of symmetrical slots 263 are provided on the middle frame 261 for securing and fixing electrical components. The two ends of adjustment component 26 are slidably connected to two symmetrical inner plates 25 inside cabinet 2, allowing for free lateral movement along the inner plates 25. Simultaneously, the positioning block 265 of adjustment component 26 engages with the multiple slots 214 of trapezoidal block 211 to achieve multi-level fixing. The cabinet can flexibly adjust its installation position and spacing according to the specifications, quantity, and installation layout requirements of the power distribution components. It adapts to different models and arrangements of low-voltage power distribution components, improving the cabinet's adaptability and versatility. This eliminates the need to replace the cabinet due to changes in component specifications, reducing operating costs. Multiple slots 263 are provided, divided into two groups. These two groups are symmetrically arranged vertically. One group of slots 263 is evenly arranged on the middle frame 261. A sliding groove 264 is provided on the outer side of the middle frame 261. There are two of the four types of slides 264. Two slides 264 are set at both ends of the middle frame 261 in the vertical direction. A connecting post 267 is slidably connected to the end of the middle frame 261 near the trapezoidal block 211. A positioning block 265 is fixedly connected to one end of the connecting post 267 near the trapezoidal block 211. There are two positioning blocks 265. The two positioning blocks 265 are symmetrically arranged with the middle frame 261 as the center. A spring 266 is set on the outside of the connecting post 267. The two ends of the spring 266 are fixedly connected to the positioning block 265 and the slide 264 respectively.

[0016] In normal use, external cold air enters the bottom of the housing 21 through the square holes 7 on the four sides of the base 1, flows upward through the circuit breaker, contactor and other components inside the housing, and carries away the heat. The hot air in the lower part of the space enters the independent heat dissipation cavity through the through slot 29. At the same time, air enters through the square slot 210 on one side of the heat dissipation cavity at the top of the housing 21, mixes with the cold air entering from one side of the cavity, and washes the heat dissipation plate 23 with openings on the lower inner wall of the cavity. Then the hot air mixed in the cavity is naturally discharged from the square slot 210 on the other side of the heat dissipation cavity. The rear fan 5 is in a stopped state. The entire process relies on the natural convection of hot air to achieve heat dissipation, which is energy-saving and quiet.

[0017] Under high temperature conditions, the rear fan 5 starts, and external cold air is simultaneously introduced in three directions. The square holes 7 on the four sides of the base supply air to the inner shell, and the square slots on the left and right sides of the top heat dissipation cavity supply air inward at the same time, doubling the supply of cold air. The cold air from both sides of the top inner cavity directly impacts the perforated heat dissipation plate 23, forming a strong crossflow cooling on the high-heat area of ​​the busbar. The cold air from the shell 21 carries away the heat from the components and enters the top inner cavity upward, where it merges with the cold air from both sides. Under the negative pressure of the rear fan 5, the airflow quickly sweeps across the heat dissipation plate and the busbar area, completing efficient heat exchange. All the hot air in the top inner cavity is strongly sucked by the rear fan 5 and guided by the guide shroud 212 before being uniformly discharged from the rear of the cabinet 2.

Claims

1. A high-efficiency heat dissipation type AC low-voltage distribution cabinet, characterized in that: include The cabinet (2) and the base (1) fixedly installed at the bottom of the cabinet (2) have square holes (7) on the outside of the base (1). There are multiple square holes (7) evenly distributed on the four sides of the base (1). The front end of the cabinet (2) is hinged to a cabinet door (3). The rear end of the cabinet (2) is fixedly connected to a fan (5). The outer side of the cabinet (2) near the fan (5) is fixedly connected to a protective cover (6). Ventilation assembly (4), the ventilation assembly (4) is fixedly installed on the side of the cabinet (2) away from the base (1); The ventilation component (4) includes a fixed frame (41), which is fixedly connected to the cabinet (2). There are two fixed frames (41). A frame (42) and a trapezoidal frame (43) are provided on opposite sides of the two fixed frames (41). There are two frame (42) and trapezoidal frame (43). The two frame (42) and trapezoidal frame (43) are alternately arranged to form a quadrilateral. A middle plate (44) is fixedly connected at the interval between the two frame (42). There are multiple middle plates (44). Multiple middle plates (44) are evenly arranged on the frame (42). A vertical plate (46) is fixedly connected at the top center of the middle plate (44). A V-shaped plate (45) is fixedly connected at the top of the vertical plate (46). The middle plate (44) is U-shaped, and the edge of the middle plate (44) near the vertical plate (46) is inclined.

2. The high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 1, characterized in that: A card plate (47) is fixedly connected to the side of the frame (42) near the middle plate (44). The card plate (47) is V-shaped. There are multiple card plates (47). Two card plates (47) are divided into a group. The two card plates (47) in a group are located inside between the middle plate (44) and the V-shaped plate (45).

3. The high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 1, characterized in that: The cabinet (2) includes a shell (21), the bottom of the shell (21) is fixedly connected to the top of the base (1), a square plate (22) is fixedly connected to the inner wall of the shell (21), a square groove (210) is provided on the outer side of the shell (21) away from the base (1), the square groove (210) completely penetrates the shell (21) along the direction of the square plate (22), the fixing frame (41) is located inside the square groove (210), and the square plate (22) is located below the square groove (210).

4. The high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 3, characterized in that: A heat sink (23) is fixedly connected to the top of the square plate (22). There are multiple heat sinks (23), which are evenly distributed on the square plate (22). A circular hole (24) is opened on the outer side of the heat sink (23), and the circular hole (24) penetrates the heat sink (23). The heat sink (23) is perpendicular to the square plate (22). A through groove (29) is opened on the outer side of the square plate (22), and the through groove (29) is located at the interval between two adjacent square plates (22). A flow guide (212) is fixedly connected to the inner wall of the housing (21) near the fan (5). An inner plate (25) is provided inside the housing (21).

5. The high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 4, characterized in that: There are two inner plates (25), which are symmetrically arranged inside the shell (21). The inner plates (25) are located below the square plate (22). An adjustment component (26) is provided at the interval between the two inner plates (25). The two ends of the adjustment component (26) are slidably connected to the two inner plates (25). A limit block (216) is fixedly connected to the side of the inner plate (25) away from the adjustment component (26). A side block (213) is fixedly connected to the inner wall of the shell (21).

6. The high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 5, characterized in that: The limiting block (216) is provided with a buffer block (217) at one end away from the inner plate (25). The two ends of the buffer block (217) are fixedly connected to an extension block (218). The end of the extension block (218) away from the buffer block (217) is fixedly connected to a spring plate (215). The spring plates (215) located at both ends of the buffer block (217) are fixedly connected to the side block (213) and the limiting block (216) respectively. The end of the inner plate (25) away from the limiting block (216) is fixedly connected to a trapezoidal block (211).

7. The high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 6, characterized in that: The trapezoidal block (211) has a slot (214) on its outer side. There are multiple trapezoidal blocks (211) and multiple trapezoidal blocks (211) are evenly arranged on the inner plate (25). There are multiple slots (214) and multiple slots (214) are evenly arranged on the trapezoidal blocks (211). The bottom of the housing (21) has a through hole (27). The housing (21) has a discharge trough (28) near the ventilation component (4).

8. The high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 5, characterized in that: The adjustment component (26) includes a middle frame (261), and a side groove (262) is provided at the middle of the end of the middle frame (261). The side groove (262) is trapezoidal and there are two side grooves (262). The two side grooves (262) are symmetrically arranged with the middle frame (261) as the center. A slot (263) is provided on the outer side of the middle frame (261). There are multiple slots (263). The multiple slots (263) are divided into two groups. The two groups of slots (263) are symmetrically arranged vertically. One group of slots (263) is evenly arranged on the middle frame (261). A sliding groove (264) is provided on the outer side of the middle frame (261).

9. The high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 8, characterized in that: There are two slides (264), and the two slides (264) are set at both ends of the middle frame (261) in the vertical direction. The middle frame (261) is slidably connected to the end near the trapezoidal block (211) with a connecting post (267), and the end of the connecting post (267) near the trapezoidal block (211) is fixedly connected to a positioning block (265).

10. A high-efficiency heat dissipation AC low-voltage distribution cabinet according to claim 9, characterized in that: There are two positioning blocks (265), and the two positioning blocks (265) are symmetrically arranged with the middle frame (261) as the center. A spring (266) is provided on the outside of the connecting column (267), and the two ends of the spring (266) are fixedly connected to the positioning block (265) and the slide (264) respectively.

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