A heat dissipation structure of a frequency converter power distribution cabinet

Abstract

The utility model relates to a kind of heat dissipation structure of frequency converter switchboard, belong to electrical equipment heat dissipation technical field, the heat dissipation structure of frequency converter switchboard includes: cabinet, electrical bin and ventilation bin. Ventilation bin two sides are respectively set outer vent and inner vent, and outer heat dissipation port is set on cabinet. Multiple ventilation bin is set in the periphery of the electrical bin along circulation direction. Heat dissipation fan is set on outer heat dissipation port, and air inlet guide plate is set on inner vent, and air inlet guide plate extends along circulation direction. The multiple ventilation bin of peripheral encircling arrangement and the air inlet guide plate on each ventilation bin of the application, so that the airflow enters electrical bin and forms the airflow path of "encircling-vortex", realizes cabinet temperature field homogenization, significantly reduces local hot spot, improves overall heat dissipation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of heat dissipation technology of electrical equipment, and particularly relates to a heat dissipation structure for a frequency converter distribution cabinet. Background Technology

[0002] Variable frequency drive (VFD) distribution cabinets are widely used electrical devices in industrial and commercial sectors. They are primarily used to control and regulate the operation of VFDs, while also providing an integrated installation platform for other power distribution equipment. VFDs generate a significant amount of heat during operation, especially under high loads. This heat accumulation can lead to overheating, affecting the equipment's performance and lifespan. Therefore, a well-designed heat dissipation system is crucial for the stable operation of VFD distribution cabinets.

[0003] Currently, the heat dissipation structure of inverter distribution cabinets is mainly air cooling. Air cooling usually involves setting a heat dissipation hole at one end of the distribution cabinet to allow air to enter the cabinet and then exhaust it through the heat dissipation hole at the other end. At the same time, a cooling fan is installed on the heat dissipation hole at one end to enhance airflow and thus improve heat dissipation efficiency.

[0004] While current air-cooled structures have improved heat dissipation efficiency to some extent, their design still has significant shortcomings. Due to the limited airflow path, air cannot fully circulate throughout the entire space within the distribution cabinet, resulting in uneven heat dissipation. Especially in localized areas of critical equipment such as frequency converters, heat cannot be dissipated in time, easily forming hot spots, which in turn affects the stability and reliability of the equipment. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, one aspect of this application proposes a heat dissipation structure for a frequency converter distribution cabinet, comprising:

[0007] Cabinet;

[0008] An electrical compartment, located within the cabinet, is used to install electrical equipment;

[0009] A ventilation chamber is disposed inside the cabinet.

[0010] The ventilation chamber is provided in multiple ways, and the multiple ventilation chambers are arranged around the periphery of the electrical chamber along the circulation direction;

[0011] An external ventilation opening is provided on the side of the ventilation chamber away from the electrical compartment to connect the ventilation chamber to the external space of the cabinet; multiple internal ventilation openings are provided on the side of the ventilation chamber closer to the electrical compartment to connect the ventilation chamber to the electrical compartment.

[0012] The cabinet is provided with an external heat dissipation vent to connect the electrical compartment to the space outside the cabinet; the external heat dissipation vent is provided with a heat dissipation fan;

[0013] Each of the internal ventilation openings is equipped with an air inlet guide plate; the two ends of the internal ventilation opening are respectively designated as end A and end B, and end A and end B are arranged sequentially along the circulation direction; one end of the air inlet guide plate is connected to end A of the internal ventilation opening, and the other end of the air inlet guide plate extends towards end B on the side closer to the electrical compartment.

[0014] In this technical solution, the structural design utilizes multiple ventilation chambers arranged in a surrounding pattern and air intake guide plates on each chamber to create a "surrounding-vortex" airflow path after the air enters the electrical compartment. This achieves uniform temperature distribution within the cabinet, significantly reduces localized hot spots, and improves overall heat dissipation efficiency. Furthermore, the incoming airflow is concentrated in one ventilation chamber and then diverted into the electrical compartment through multiple internal vents, ensuring uniform airflow distribution within the electrical compartment and effectively cooling all areas, thus further enhancing overall heat dissipation efficiency.

[0015] In some embodiments, a plurality of the internal vents on the ventilation chamber extend sequentially toward another adjacent ventilation chamber along the circulation direction.

[0016] In the technical solution, the structural design arranges the internal ventilation openings along the flow direction of the vortex, which can accelerate the formation of the vortex. Furthermore, the airflow of adjacent ventilation chambers induces each other, further enhancing the vortex intensity, improving air volume utilization, and reducing fan power consumption.

[0017] In some embodiments, an air intake cooling fan is provided on the external vent.

[0018] In the technical solution, the structural design enhances the active intake of external cold air by adding an air intake cooling fan to the external ventilation opening, increases the pressure difference between the ventilation chamber and the electrical chamber, ensures sufficient air volume in the electrical chamber, and prevents electrical equipment from overheating and shutting down.

[0019] In some embodiments, the circulation direction is located on a vertical plane, and the external heat dissipation vent is located at the top of the cabinet.

[0020] In the technical solution, the structural design enables the formation of airflow vortices in the vertical plane and utilizes the principle of natural rise of hot air to form a "chimney effect," which accelerates the discharge of hot air, reduces the load on the heat dissipation fan, and achieves low-energy and high-efficiency heat dissipation.

[0021] In some embodiments, it further includes:

[0022] A radiator is mounted on the cabinet and located on the periphery of the cabinet.

[0023] A heat-conducting copper pipe, one end of which is connected to the heat sink, and the other end of which is connected to the electrical equipment.

[0024] In the technical solution, the structural design can quickly dissipate the heat from the key heat-generating components in electrical equipment. Combined with the fins of the heat sink, it achieves localized enhanced heat dissipation by combining "point-to-surface" approaches, further reducing the temperature rise of key components.

[0025] In some embodiments, it further includes:

[0026] An external heat dissipation chamber is disposed on the cabinet body and located on the periphery of the cabinet body;

[0027] The external heat dissipation chamber is provided with an external air inlet and an external air outlet at both ends, which are used to connect the external heat dissipation chamber to the space outside the cabinet.

[0028] The radiator is disposed in the heat dissipation chamber and is located between the external air inlet and the external air outlet;

[0029] At least one of the external air inlet and the external air outlet is equipped with an external cooling fan.

[0030] In the technical solution, the structural design places the heat sink in an independent external heat dissipation chamber. The external heat dissipation chamber is equipped with external air inlets / outlets at both ends and external cooling fans, forming an "external circulation" heat dissipation channel that is isolated from the air duct inside the cabinet, thereby improving the heat dissipation efficiency of key components.

[0031] In some embodiments, the external air inlet and the external air outlet are arranged vertically in sequence.

[0032] In the technical solution, the structural design arranges the external air inlet and outlet vertically, utilizing the natural convection of hot air rising and cold air sinking to reduce fan running time, noise, and energy consumption.

[0033] In some embodiments, the external heat dissipation chamber is located at the top of the cabinet, and the external heat dissipation vent is located below the external heat dissipation chamber.

[0034] In the technical solution, the structural design achieves a three-dimensional heat dissipation layout of "top heat exhaust and side air intake", which reduces hot air recirculation, improves heat dissipation efficiency and saves installation space.

[0035] In some embodiments, it further includes:

[0036] An internal heat dissipation chamber is disposed inside the cabinet and located on the periphery of the electrical compartment;

[0037] The inner heat dissipation chamber has multiple internal heat dissipation vents on the side closest to the electrical compartment to connect the inner heat dissipation chamber to the electrical compartment; the outer heat dissipation vent is located on the side of the inner heat dissipation chamber away from the electrical compartment.

[0038] Each of the internal heat dissipation vents is equipped with an air outlet guide plate; the two ends of the internal heat dissipation vent are respectively designated as end C and end D, and end C and end D are arranged sequentially along the circulation direction; one end of the air outlet guide plate is connected to end D of the internal heat dissipation vent, and the other end of the air outlet guide plate extends towards end C on the side closer to the electrical compartment.

[0039] In the technical solution, the structural design allows hot air inside the electrical compartment to enter the heat dissipation compartment in a designated direction and be discharged through the external heat dissipation vents; this increases the heat dissipation speed and reduces the average temperature inside the cabinet.

[0040] In some embodiments, it further includes:

[0041] The bottom of the cabinet is mounted on the bottom support.

[0042] In the technical solution, the structural design raises the cabinet, creating a natural air intake channel underneath, increasing the air intake area and reducing the intake of dust from the ground; on the other hand, it facilitates forklift handling and on-site installation and maintenance.

[0043] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0044] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0045] Figure 1 This is a schematic diagram of the heat dissipation structure of the inverter distribution cabinet according to an embodiment of this application. Figure 1 ;

[0046] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0047] Figure 3 This is a schematic diagram of the heat dissipation structure of the inverter distribution cabinet according to an embodiment of this application. Figure 2 ;

[0048] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0049] Figure 5This is a schematic diagram of the heat dissipation structure of the inverter distribution cabinet according to an embodiment of this application. Figure 3 ;

[0050] Figure 6 This is a schematic diagram of the airflow and internal structure of the heat dissipation structure of the inverter distribution cabinet according to an embodiment of this application.

[0051] In the picture:

[0052] 1. Cabinet; 11. Electrical compartment; 12. Ventilation compartment; 121. External vent; 122. Internal vent; 1221. End A; 1222. End B; 123. Air inlet guide plate; 13. Internal heat dissipation compartment; 131. External heat dissipation vent; 132. Internal heat dissipation vent; 1321. End C; 1322. End D; 133. Air outlet guide plate; 14. External heat dissipation compartment; 141. External air inlet; 142. External air outlet;

[0053] 2. Electrical equipment; 3. Circulation direction; 4. Exhaust cooling fan; 5. Intake cooling fan; 6. Radiator; 7. Thermal conductive copper pipe; 8. External cooling fan; 9. Bottom bracket. Detailed Implementation

[0054] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0055] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 utility model 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 utility model.

[0056] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0057] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0058] In existing technologies, the heat dissipation structure of inverter distribution cabinets is air-cooled. Ventilation holes are provided at both ends of the cabinet, allowing airflow to enter the cabinet through one end, carrying away heat from the electrical equipment, and exiting the cabinet through the other end. At least one end of the ventilation holes is fitted with a cooling fan to enhance airflow and improve heat dissipation efficiency. However, airflow inside the cabinet typically follows the line connecting the two ventilation holes. Even if the ventilation holes are positioned diagonally across the cabinet, air cannot fully circulate throughout the entire space inside the distribution cabinet. The heat generated by electrical equipment not located along the line connecting the two ventilation holes cannot be efficiently carried away by the airflow, resulting in uneven heat dissipation. This is particularly problematic in areas where critical equipment such as the inverter generates significant heat; if this heat cannot be dissipated in time, it will affect the stability and reliability of the equipment.

[0059] like Figures 1 to 6 As shown in an illustrative embodiment of the heat dissipation structure of the inverter distribution cabinet of this utility model, the heat dissipation structure of the inverter distribution cabinet includes a cabinet 1, and an electrical compartment 11 and a ventilation compartment 12 are arranged inside the cabinet 1. Electrical equipment 2, such as inverters, is installed in the electrical compartment 11. A circulation direction 3 is set inside the cabinet 1, which is a closed path direction that circles around the center of the internal space of the cabinet 1 in a clockwise or counterclockwise direction. Multiple ventilation compartments 12 are arranged around the electrical compartment 11 along the circulation direction 3. A partition is usually set inside the cabinet 1 to separate the ventilation compartments 12 in the internal space of the cabinet 1. The outer side of the ventilation compartment 12 is the side plate, top plate or bottom plate of the cabinet 1.

[0060] like Figure 6 As shown, the ventilation chamber 12 has an external ventilation opening 121 on the side away from the electrical compartment 11, thereby connecting the ventilation chamber 12 to the external space of the cabinet 1. The ventilation chamber 12 has multiple internal ventilation openings 122 on the side closer to the electrical compartment 11, thereby connecting the ventilation chamber 12 to the electrical compartment 11. The cabinet 1 has an external heat dissipation vent 131, on which a heat dissipation fan 4 is installed. The external heat dissipation vent 131 is typically located in the portion of the cabinet 1 where the ventilation chamber 12 is not located, allowing the electrical compartment 11 to connect to the external space of the cabinet 1 through the external heat dissipation vent 131.

[0061] like Figure 2 As shown, each internal ventilation opening 122 is equipped with an air inlet guide plate 123. The two ends of each internal ventilation opening 122 are designated as end A 1221 and end B 1222, respectively, and end A 1221 and end B 1222 are arranged sequentially along the circulation direction 3. One end of each air inlet guide plate 123 is connected to end A 1221 of the internal ventilation opening 122, and the other end of each air inlet guide plate 123 extends towards end B 1222 on the side closer to the electrical compartment 11.

[0062] The heat generated by the operation of electrical equipment 2 is dissipated into electrical compartment 11. The heat dissipation fan 4 operates, expelling the hot air from electrical compartment 11 to the outside of cabinet 1 through external vent 131, thus cooling electrical equipment 2. Simultaneously, the expulsion of hot air creates a slight negative pressure inside electrical compartment 11, generating a pressure difference between electrical compartment 11 and ventilation compartment 12. This causes external air to enter ventilation compartment 12 through external vent 121, and then enter electrical compartment 11 through internal vent 122. After absorbing the heat generated by electrical equipment 2, the air is expelled through external vent 131, continuously cooling electrical equipment 2.

[0063] like Figure 6 As shown, each ventilation chamber 12 simultaneously draws in outside air through its external vent 121 and sends it into the electrical chamber 11 through its respective internal vent 122. After passing through the internal vent 122, the outside air contacts the surface of the air inlet guide plate 123 away from the electrical chamber 11 and flows along the air inlet guide plate 123 into the electrical chamber 11. Since the air inlet guide plate 123 extends from end A 1221 to end B 1222 near the electrical chamber 11, the airflow entering the electrical chamber 11 flows along the circulation direction 3. The airflow flowing into the electrical chamber 11 through each ventilation chamber 12 flows along the circulation direction 3, thereby forming a circulating airflow in the electrical chamber 11. The airflow can flow through various locations within the electrical chamber 11, carrying away heat from each location, and then is discharged through the external heat dissipation vent 131.

[0064] This structural design guides airflow into the electrical chamber 11 through multiple surrounding ventilation chambers 12 and air inlet guide plates 123 on each ventilation chamber 12. This airflow flows along the circulation direction 3 within the electrical chamber 11, creating a "surrounding-vortex" airflow path. The airflow reaches all locations within the electrical chamber 11, effectively removing heat from all electrical devices 2 and preventing localized overheating, thus improving overall heat dissipation efficiency. Furthermore, the airflow from the ventilation chambers 12 is delivered into the electrical chamber 11 through multiple internal ventilation openings 122, ensuring uniform airflow distribution within the electrical chamber 11. The cooler air surrounds the electrical devices 2, quickly removing the heat generated by the devices and effectively cooling all locations within the electrical chamber 11, further improving overall heat dissipation efficiency.

[0065] In some embodiments, a plurality of internal ventilation openings 122 on the ventilation chamber 12 extend sequentially toward an adjacent ventilation chamber 12 along the circulation direction 3. This structural design arranges the internal ventilation openings 122 on the same ventilation chamber 12 along the direction of airflow circulation within the electrical chamber 11. Airflow passes through one internal ventilation opening 122 and is guided by the air inlet guide plate 123, flowing along the circulation direction 3 in the electrical chamber 11. When it reaches an adjacent internal ventilation opening 122, it contacts and merges with the airflow flowing in through the other internal ventilation opening 122. This causes the airflow to be continuously pushed in the circulation direction 3 by the newly merged airflow within the electrical chamber 11, accelerating the formation of vortices within the electrical chamber 11. Furthermore, the airflows in adjacent ventilation chambers 12 mutually induce each other, further enhancing the vortex intensity. This results in rapid airflow circulation, quickly removing heat and improving airflow utilization. Simultaneously, it allows hot air to circulate rapidly and be discharged to the external heat dissipation port 131, reducing the power consumption of the heat dissipation fan 4.

[0066] In some embodiments, an intake cooling fan 5 is provided on the external vent 121. This structural design enables the intake cooling fan 5 to actively draw external air into the ventilation chamber 12, thereby enhancing the active intake of external cold air, increasing the air pressure in the ventilation chamber 12, and thus increasing the air pressure difference between the ventilation chamber 12 and the electrical chamber 11. This allows cold air to enter the electrical chamber 11 more quickly, ensuring sufficient airflow in the electrical chamber 11, effectively removing heat, and preventing the electrical equipment 2 from overheating and shutting down.

[0067] In some embodiments, the circulation direction 3 is located on the vertical plane, that is, on the side of the cabinet 1. The airflow in the electrical compartment 11 flows clockwise or counterclockwise, causing the circulating airflow in the electrical compartment 11 to flow upward on one side in the horizontal direction. The external heat dissipation vent 131 is provided at the top of the cabinet 1 to allow hot air to rise and be exhausted. The external heat dissipation vent 131 is usually provided on the side where the circulating airflow in the electrical compartment 11 flows upward. This structural design allows the circulating airflow to fully absorb heat in the electrical compartment 11, then flow upward and toward the external heat dissipation vent 131. Utilizing the principle of natural rising of hot air to form a "chimney effect," it accelerates the exhaust through the external heat dissipation vent 131, improves heat dissipation efficiency, and reduces the load on the heat dissipation fan 4, achieving low-energy and high-efficiency heat dissipation.

[0068] In some embodiments, the heat dissipation structure of the inverter distribution cabinet further includes a heat sink 6 and a heat-conducting copper pipe 7. The heat sink 6 is disposed on the cabinet body 1 and located on the periphery of the cabinet body 1, so that the heat sink 6 is in the external space of the cabinet body 1. One end of the heat-conducting copper pipe 7 is connected to the heat sink 6, and the other end is connected to the electrical equipment 2, so that the heat of the electrical equipment 2 is efficiently transferred to the heat sink 6 through the heat-conducting copper pipe 7. The heat sink 6 is usually made of aluminum alloy with high thermal conductivity and is a finned structure with a large contact area with the external air of the cabinet body 1, thereby dissipating the heat transferred from the electrical equipment 2 through the heat-conducting copper pipe 7 to the external air of the cabinet body 1.

[0069] This structural design targets key heat-generating components such as frequency converters in electrical equipment 2, which generate a large amount of heat. The heat is quickly conducted to the outside of the cabinet 1 through the heat-conducting copper pipe 7, and then efficiently dissipated to the outside air through the fins of the heat sink. This achieves localized enhanced heat dissipation by combining "point-surface" methods, which enhances the heat dissipation of high-heat equipment, reduces the temperature rise of key components, and further ensures that all electrical equipment 2 is adequately cooled.

[0070] In some embodiments, the heat dissipation structure of the inverter distribution cabinet further includes an external heat dissipation chamber 14. The external heat dissipation chamber 14 is disposed on the cabinet body 1 and located on the periphery of the cabinet body 1, such that the external heat dissipation chamber 14 is located in the outer space of the cabinet body 1. An external air inlet 141 and an external air outlet 142 are respectively provided at both ends of the external heat dissipation chamber 14, so that the external heat dissipation chamber 14 is connected to the space outside the cabinet body 1. At least one of the external air inlet 141 and the external air outlet 142 is provided with an external cooling fan 8, so that the external cooling fan 8 can introduce external airflow into the external heat dissipation chamber 14 through the external air inlet 141 and then exhaust it through the external air outlet 142. A radiator 6 is disposed in the heat dissipation chamber and located between the external air inlet 141 and the external air outlet 142, so that when external airflow flows from the external air inlet 141 to the external air outlet 142, it flows over the radiator 6, carrying away the heat from the radiator 6.

[0071] The structural design places the heat sink 6 in an independent external heat dissipation chamber 14. The external heat dissipation chamber 14 is equipped with external air inlets / outlets at both ends and external cooling fans 8, forming a separate airflow heat dissipation channel outside the cabinet 1, which specifically accelerates the heat dissipation of the heat sink 6 and improves the heat dissipation efficiency of key components.

[0072] In some embodiments, the external air inlet 141 and the external air outlet 142 are arranged vertically in sequence, such that the external air outlet 142 is located above the external air inlet 141. This structural design utilizes the natural convection of hot air rising and cold air sinking, allowing hot air to be more efficiently discharged upwards through the external air outlet 142 into the external heat dissipation chamber 14. This eliminates the need for excessive airflow guidance by the external cooling fan 8, ensuring heat dissipation efficiency and reducing the energy consumption and operating noise of the external cooling fan 8.

[0073] In some embodiments, the external heat dissipation chamber 14 is disposed at the top of the cabinet 1, and the external heat dissipation vent 131 is located below the external heat dissipation chamber 14. Because the electrical equipment 2, which transfers heat to the radiator 6 in the external heat dissipation chamber 14, generates a large amount of heat, the temperature of the radiator 6 is higher than the temperature of the hot air discharged through the external heat dissipation vent 131. The hot air discharged through the external heat dissipation vent 131 rises and passes through the radiator 6 in the external heat dissipation chamber 14, still efficiently carrying away the heat from the radiator 6. This structural design concentrates the high-heat areas around the radiator 6 and around the external heat dissipation vent 131 at the top, achieving a three-dimensional heat dissipation layout with heat dissipation at the top of the cabinet 1 and air intake at the bottom and sides. After the hot air is discharged, it rises away from the cabinet 1, and the air entering the cabinet 1 is all cold air, preventing hot air from flowing back into the cabinet 1 and improving heat dissipation efficiency.

[0074] In some embodiments, the heat dissipation structure of the inverter distribution cabinet further includes an inner heat dissipation chamber 13. The inner heat dissipation chamber 13 is disposed inside the cabinet 1 and is located on the periphery of the electrical compartment 11. The internal space of the cabinet 1 is usually divided into the inner heat dissipation chamber 13 by a partition, and the outer side of the inner heat dissipation chamber 13 is the side plate, top plate or bottom plate of the cabinet 1.

[0075] The inner heat dissipation chamber 13 has multiple internal heat dissipation vents 132 on the side near the electrical compartment 11, thereby connecting the inner heat dissipation chamber 13 to the electrical compartment 11 through the internal heat dissipation vents 132. The outer heat dissipation vent 131 is located on the side of the inner heat dissipation chamber 13 away from the electrical compartment 11, thereby connecting the inner heat dissipation chamber 13 to the external space of the cabinet 1 through the outer heat dissipation vent 131.

[0076] like Figure 4As shown, each of the inner heat dissipation vents 132 is equipped with an air outlet guide plate 133. The two ends of the inner heat dissipation vent 132 are respectively designated as end C 1321 and end D 1322, which are arranged sequentially along the circulation direction 3. One end of the air outlet guide plate 133 is connected to end D 1322 of the inner heat dissipation vent 132, and the other end of the air outlet guide plate 133 extends towards end C 1321 towards the side near the electrical compartment 11.

[0077] This structural design causes the surface of the air outlet guide plate 133 near the inner heat dissipation chamber 13 to a certain extent meet the circulating airflow inside the electrical compartment 11, thereby guiding the airflow through the inner heat dissipation port 132 into the inner heat dissipation chamber 13, and then concentrating it for discharge, increasing the heat dissipation speed and reducing the temperature inside the cabinet. On the other hand, the airflow flowing into the inner heat dissipation chamber 13 guided by the air outlet guide plate 133 is not directed directly towards the outer heat dissipation port 131, but towards the inner wall of the inner heat dissipation chamber 13, thereby forming a small vortex in the inner heat dissipation chamber 13, accelerating the generation of negative pressure, and thus speeding up the discharge of hot air.

[0078] In some embodiments, the heat dissipation structure of the inverter distribution cabinet is further supported by a bottom bracket 9. The bottom of the cabinet 1 is mounted on the bottom bracket 9, separating the bottom surface of the cabinet 1 from the ground. When the circulation direction 3 is in a vertical plane and the external heat dissipation vent 131 is located at the top of the cabinet 1, the ventilation chamber 12 is typically located at the top, bottom, and both sides in the horizontal direction of the cabinet 1. The bottom ventilation chamber 12 typically has an external air inlet 141 on the bottom surface of the cabinet 1, and the space between the cabinet 1 and the ground facilitates the entry of external cold air into the bottom ventilation chamber 12. This structural design raises the cabinet 1, creating a natural air intake channel below the cabinet 1, increasing the air intake area, and reducing the intake of ground dust; on the other hand, it facilitates forklift handling and on-site installation and maintenance.

[0079] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0080] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A heat dissipation structure for a frequency converter distribution cabinet, characterized in that, include: Cabinet; An electrical compartment, located within the cabinet, is used to install electrical equipment; A ventilation chamber is disposed inside the cabinet. The ventilation chamber is provided in multiple ways, and the multiple ventilation chambers are arranged around the periphery of the electrical chamber along the circulation direction; An external ventilation opening is provided on the side of the ventilation chamber away from the electrical compartment to connect the ventilation chamber to the external space of the cabinet; multiple internal ventilation openings are provided on the side of the ventilation chamber closer to the electrical compartment to connect the ventilation chamber to the electrical compartment. The cabinet is provided with an external heat dissipation vent to connect the electrical compartment to the space outside the cabinet; the external heat dissipation vent is provided with a heat dissipation fan; Each of the internal ventilation openings is equipped with an air inlet guide plate; the two ends of the internal ventilation opening are respectively designated as end A and end B, and end A and end B are arranged sequentially along the circulation direction; one end of the air inlet guide plate is connected to end A of the internal ventilation opening, and the other end of the air inlet guide plate extends towards end B on the side closer to the electrical compartment.

2. The heat dissipation structure of the frequency converter distribution cabinet according to claim 1, characterized in that, The plurality of internal ventilation openings on the ventilation chamber extend sequentially into another adjacent ventilation chamber along the circulation direction.

3. The heat dissipation structure of the frequency converter distribution cabinet according to claim 1, characterized in that, An air intake cooling fan is installed on the external ventilation opening.

4. The heat dissipation structure of the frequency converter distribution cabinet according to claim 1, characterized in that, The circulation direction is located on a vertical plane, and the external heat dissipation vent is located at the top of the cabinet.

5. The heat dissipation structure of the frequency converter distribution cabinet according to claim 1, characterized in that, Further includes: A radiator is mounted on the cabinet and located on the periphery of the cabinet. A heat-conducting copper pipe, one end of which is connected to the heat sink, and the other end of which is connected to the electrical equipment.

6. The heat dissipation structure of the frequency converter distribution cabinet according to claim 5, characterized in that, Further includes: An external heat dissipation chamber is disposed on the cabinet body and located on the periphery of the cabinet body; The external heat dissipation chamber is provided with an external air inlet and an external air outlet at both ends, which are used to connect the external heat dissipation chamber to the space outside the cabinet. The radiator is disposed in the heat dissipation chamber and is located between the external air inlet and the external air outlet; At least one of the external air inlet and the external air outlet is equipped with an external cooling fan.

7. The heat dissipation structure of the frequency converter distribution cabinet according to claim 6, characterized in that, The external air inlet and the external air outlet are arranged vertically in sequence.

8. The heat dissipation structure of the frequency converter distribution cabinet according to claim 7, characterized in that, The external heat dissipation chamber is located at the top of the cabinet, and the external heat dissipation vent is located below the external heat dissipation chamber.

9. The heat dissipation structure of the frequency converter distribution cabinet according to claim 1, characterized in that, Further includes: An internal heat dissipation chamber is disposed inside the cabinet and located on the periphery of the electrical compartment; The inner heat dissipation chamber has multiple internal heat dissipation vents on the side closest to the electrical compartment to connect the inner heat dissipation chamber to the electrical compartment; the outer heat dissipation vent is located on the side of the inner heat dissipation chamber away from the electrical compartment. Each of the internal heat dissipation vents is equipped with an air outlet guide plate; the two ends of the internal heat dissipation vent are respectively designated as end C and end D, and end C and end D are arranged sequentially along the circulation direction; one end of the air outlet guide plate is connected to end D of the internal heat dissipation vent, and the other end of the air outlet guide plate extends towards end C on the side closer to the electrical compartment.

10. The heat dissipation structure of the frequency converter distribution cabinet according to claim 1, characterized in that, Further includes: The bottom of the cabinet is mounted on the bottom support.

Images