An electrical cabinet

Abstract

This invention provides an electrical cabinet, belonging to the field of electrical equipment technology, comprising a cabinet body, a heat exchanger, multiple sets of airflow guides, and electrical component groups. The cabinet body has a closed cavity; the heat exchanger is mounted on the side panel of the cabinet body and has an internal circulation air outlet and an internal circulation air return outlet; multiple sets of airflow guides are respectively disposed within the closed cavity; the cold air output from the internal circulation air outlet forms a multi-stage airflow circulation flow that does not interfere with each other under the action of each set of airflow guides, and the airflow circulation flows at each stage converge at the internal circulation air return outlet and enter the heat exchanger for heat exchange; the paths of each stage of airflow circulation flow are radially distributed outwards from the heat exchanger, with the heat exchanger as the reference point; the electrical component groups are distributed along the paths of each stage of airflow circulation flow. This invention forms a multi-stage airflow circulation flow within the closed cavity, ensuring that each electrical component has airflow passing through, guaranteeing heat dissipation for each electrical component, and avoiding localized hotspots.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, and more specifically, relates to an electrical cabinet. Background Technology

[0002] Some electrical cabinets are used in harsh environments such as high temperature, high humidity, and high dust. In order to protect the power devices inside, the electrical cabinets are required to have high sealing performance and high protection level. Therefore, the only option is to use a closed heat dissipation system for the electrical cabinets.

[0003] In existing technologies, to improve the heat dissipation efficiency of electrical cabinets, an air-to-air heat exchanger is installed on the back of the cabinet door. This air-to-air heat exchanger facilitates heat conduction to remove heat from the inside of the cabinet. However, for electrical cabinets with large spaces, some power devices are far from the air-to-air heat exchanger, leading to localized hot spots and poor overall heat dissipation of the cabinet. Summary of the Invention

[0004] The purpose of this invention is to provide an electrical cabinet that solves the technical problems of local hot spots and poor heat dissipation in existing electrical cabinets with large spaces.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an electrical cabinet, comprising:

[0006] The cabinet has a closed cavity; an electrical component assembly is installed inside the closed cavity;

[0007] A heat exchanger is disposed on the side panel of the cabinet; the heat exchanger has an internal circulation air outlet and an internal circulation air return outlet respectively facing the enclosed cavity; and

[0008] Multiple airflow guides are respectively disposed within the enclosed cavity;

[0009] The cold air output from the internal circulation outlet forms a multi-stage airflow circulation flow that does not interfere with each other under the action of each group of airflow guides, and the airflow circulation flows at each stage converge at the internal circulation return air inlet and enter the heat exchanger for heat exchange.

[0010] The airflow circulation paths at each level are radially distributed outwards from the heat exchanger, with the heat exchanger as the reference point; the electrical component groups are distributed along the airflow circulation paths at each level.

[0011] In one possible implementation, the heat exchanger is located on the upper half of the rear panel of the cabinet; both the internal circulation air outlet and the internal circulation air return outlet face the front panel of the cabinet, and the internal circulation air outlet is located below the internal circulation air return outlet.

[0012] The heat exchanger also has an external circulation air inlet and an external circulation air outlet facing the outside, with the external circulation air inlet located below the external circulation air outlet.

[0013] In one possible implementation, the plurality of airflow guides includes a first airflow guide, which is used to guide airflow to form a first airflow circulation flow;

[0014] The electrical component group includes a first gas element, which is disposed in the upper half of the enclosed cavity and located in front of the heat exchanger;

[0015] The first airflow guide includes a wind guide component and a wind deflector component. The wind deflector component is disposed in front of the first air element. One end of the wind guide component is disposed between the internal circulation air outlet and the internal circulation air return outlet, and the other end extends to the front side of the first air element.

[0016] In some embodiments, the first gas element is distributed in multiple phases at intervals along the left and right direction of the cabinet, and each phase of the first gas element is attached to a heat sink.

[0017] The enclosed cavity is also provided with multiple sets of first air ducts corresponding to the radiator, and the radiator is located in the corresponding first air duct; a flow channel is formed between each pair of adjacent first air ducts; there is a heat dissipation space between the multiple sets of first air ducts and the rear panel of the cabinet.

[0018] The air guiding assembly includes a partition plate horizontally arranged in the heat dissipation space and a plurality of air guiding plates respectively connected to the partition plate; the partition plate is located between the internal circulation air outlet and the internal circulation air return outlet; the plurality of air guiding plates are horizontally arranged in the plurality of flow channels in a one-to-one correspondence.

[0019] In some embodiments, the lower end of the first air duct extends below the first air element and the windbreak assembly;

[0020] The internal circulation air outlet is inclined downward and faces each of the flow channels;

[0021] The multiple sets of airflow guides further include a second airflow guide, which is used to guide the airflow to form a second airflow circulation flow;

[0022] The second airflow guide includes a guide fan; the guide fan is disposed in front of each of the flow channels and below the windbreak assembly; the air inlet of the guide fan faces the rear side panel of the cabinet and is inclined downward, and the air outlet faces the front side panel of the cabinet and is inclined upward.

[0023] The electrical component group also includes a second gas element, which is located in front of the windbreak assembly and directly opposite the air outlet of the guide fan.

[0024] In some embodiments, the windbreak assembly is a mounting base plate for the second air element;

[0025] The lower end of the second gas element is lower than the lower end of the first gas element; the upper end of the first gas element is higher than the upper end of the second gas element.

[0026] The upper end of the mounting base extends upward relative to the upper end of the second gas component and is aligned with the upper end of the first gas component; the lower end of the mounting base is aligned with the lower end of the second gas component; the upwardly extending portion of the mounting base has air passage holes communicating with each of the flow channels.

[0027] In some embodiments, the first gas element includes an upper gas element and a lower gas element, the upper gas element being located above the air guide plate and corresponding to the front and rear of the air passage; the heat generation of the upper gas element is greater than that of the lower gas element.

[0028] In one possible implementation, the internal circulation air outlet is tilted downwards;

[0029] The multiple sets of airflow guides include a third airflow guide, which is used to guide airflow to form a third airflow circulation flow;

[0030] The third airflow guide includes a supply fan and a first exhaust fan; the supply fan is located in front of and below the internal circulation air outlet, with its outlet facing the lower side panel of the cabinet; the first exhaust fan is located at the lower front corner of the enclosed cavity; the inlet of the first exhaust fan faces the rear side panel of the cabinet.

[0031] The electrical component group includes a third gas element and a fourth gas element; the third gas element is located in the rear half of the enclosed cavity and faces the air outlet of the blower; the fourth gas element is located in the front half of the enclosed cavity and faces the air inlet of the first exhaust fan.

[0032] In some embodiments, a sealing plate is provided on the inner side of the front panel of the cabinet, and the sealing plate and the front panel of the cabinet form a vertical channel;

[0033] The air inlet of the vertical channel is connected to the air outlet of the first exhaust fan; the air outlet of the vertical channel is located above the air inlet of the vertical channel.

[0034] The hot air flowing through the vertical channel can exchange heat through the front panel of the cabinet.

[0035] In some embodiments, the third airflow guide further includes a second exhaust fan, which is disposed in the front half of the enclosed cavity and located above the first exhaust fan; the air inlet of the second exhaust fan is aligned with the air outlet of the vertical channel, and the air outlet faces the internal circulation return air port.

[0036] The beneficial effects of the electrical cabinet provided by this invention are as follows: Compared with the prior art, the electrical cabinet of this invention has multiple sets of airflow guides in the closed cavity of the cabinet to guide the airflow to form a multi-level airflow circulation within the closed cavity. Since the electrical components are distributed on the paths of each level of airflow circulation, it can be ensured that each electrical component has airflow passing through, thus ensuring heat dissipation for each electrical component. In addition, the airflow circulation at each level is based on the heat exchanger and expands radially outward from the periphery of the heat exchanger, which can ensure that the airflow can pass through the entire closed cavity, avoid local hot spots, and improve the heat dissipation effect of the electrical cabinet. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A schematic diagram of the electrical cabinet provided in an embodiment of the present invention (the left side panel of the cabinet is not shown in the figure).

[0039] Figure 2 for Figure 1 The front view (the three dashed lines in the figure represent the path of multi-stage airflow circulation);

[0040] Figure 3 A schematic diagram of the electrical component group and airflow guide corresponding to the first airflow circulation flow of the electrical cabinet provided in an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of the electrical component group and airflow guide corresponding to the second airflow circulation flow of the electrical cabinet provided in an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of the electrical component group and airflow guide corresponding to the third airflow circulation flow of the electrical cabinet provided in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the air guide assembly of the electrical cabinet provided in an embodiment of the present invention.

[0044] In the picture:

[0045] 1. Cabinet; 11. Enclosed cavity; 12. First air duct; 13. Sealing plate; 14. Vertical passage; 15. Second air duct;

[0046] 2. Heat exchanger; 21. Internal circulation air outlet; 22. Internal circulation air return outlet; 23. External circulation air inlet; 24. External circulation air outlet;

[0047] 3. First airflow guide; 31. Air guide assembly; 311. Partition plate; 312. Air guide plate; 32. Windproof assembly; 321. Air passage hole;

[0048] 4. Second airflow guide; 41. Airflow guide fan;

[0049] 5. Third airflow guide; 51. Supply fan; 52. First exhaust fan; 53. Second exhaust fan;

[0050] 61. First element; 611. Upper element; 612. Lower element; 62. Second element; 63. Third element; 64. Fourth element. Detailed Implementation

[0051] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0052] Please refer to the following: Figure 1 and Figure 2 The electrical cabinet provided by the present invention will now be described. The electrical cabinet includes a cabinet body 1, a heat exchanger 2, multiple sets of airflow guides, and an electrical component assembly. The cabinet body 1 has a closed cavity 11; the heat exchanger 2 is disposed on a side plate of the cabinet body 1; the heat exchanger 2 has an internal circulation air outlet 21 and an internal circulation air return outlet 22 facing the closed cavity 11 respectively. Multiple sets of airflow guides are respectively disposed within the closed cavity 11.

[0053] The cold air output from the internal circulation outlet 21 forms a multi-level airflow circulation flow that does not interfere with each other under the action of each group of airflow guides, and the airflow circulation flows of each level converge at the internal circulation return air outlet 22 to enter the heat exchanger 2 for heat exchange; the path of each level of airflow circulation flow is based on the heat exchanger 2 and expands outward in a radial pattern to the periphery of the heat exchanger 2; the electrical component group is distributed on the path of each level of airflow circulation flow.

[0054] Cabinet 1 has a rectangular parallelepiped structure, consisting of a front panel, a rear panel, a left side panel, a top panel, a bottom panel, and a supporting frame connecting and supporting these panels. Cabinet 1 has a closed cavity 11, which can be understood as the six panels of cabinet 1 forming a closed cavity 11, or the six panels of cabinet 1 cooperating with other panels within cabinet 1 to form a closed cavity 11. The closed cavity 11 is not connected to the outside, thus providing high sealing performance and a high protection level, enabling the electrical cabinet to be used in harsh environments such as high temperature, high humidity, and high dust, and meeting the usage requirements of electrical component groups.

[0055] Since the airflow needs to form a circulating flow within the closed cavity 11, and the airflow needs to exchange heat through the heat exchanger 2, in order to increase the path of the circulating flow and to reasonably allocate the layout of the electrical component group, the sequential flow generally flows through the length direction and the vertical direction of the closed cavity 11.

[0056] The heat exchanger 2 is mounted on the side panel of the cabinet 1. To facilitate airflow circulation, the heat exchanger 2 is mounted on the side panel parallel to the width direction. The heat exchanger 2 has only one internal circulation air outlet 21 and one internal circulation air return outlet 22. The various levels of circulating airflow in the enclosed cavity 11 enter the heat exchanger 2 through the internal circulation air return outlet 22, and after being cooled by heat exchange core, they enter the enclosed cavity 11 through the internal circulation air outlet 21.

[0057] The heat exchanger 2 is preferably an air-to-air heat exchanger with a heat exchange core. The heat exchanger 2 can introduce cold air from the outside and also recover hot air from the closed cavity 11. After passing through the heat exchange core, the cold air from the outside carries away the heat from the hot air in the closed cavity 11, thereby reducing the temperature of the hot air. It should be noted that the cold air from the outside and the hot air circulating in the closed cavity 11 are separated and will not clash.

[0058] Multiple sets of airflow guides are used to guide airflow to form multi-stage airflow circulation within the enclosed cavity 11. These multi-stage airflow guides can be in the form of fan combinations, air guide plate combinations to isolate airflow channels, or a combination of fan combinations and air guide plates. This embodiment does not limit the specific form of the multi-stage airflow guides, as long as they enable multi-stage airflow circulation within the enclosed cavity 11. The airflows in each stage of circulation do not interfere with each other, and each can lead to the heat exchanger 2. After heat exchange in the heat exchanger 2, the airflow re-enters the enclosed cavity 11.

[0059] The multi-stage airflow circulation takes heat exchanger 2 as the reference and expands radially outward from the heat exchanger 2. It can be understood that the path of the second-stage airflow circulation is located outside the path of the first-stage airflow circulation, and the path of the third-stage airflow circulation is located outside the path of the second-stage airflow circulation. The airflow circulation at each stage does not interfere with each other. Even if any set of airflow guides is removed, it will not affect the airflow circulation at other stages. Therefore, this embodiment can flexibly arrange the internal electrical components according to the function of the electrical cabinet.

[0060] Electrical component assemblies typically consist of high-protection-level power devices that generate heat during operation. Some of these devices generate excessive heat, which cannot be dissipated through the cabinet's own heat conduction; therefore, airflow is necessary to remove the heat. The specific type of electrical component assembly depends on the function and model of the electrical cabinet. During installation, the electrical component assemblies should be distributed along the paths of various airflow circulation levels.

[0061] Compared with the prior art, the electrical cabinet provided by the present invention has multiple sets of airflow guides in the closed cavity 11 to guide the airflow to form a multi-level airflow circulation. Since the electrical components are distributed on the path of each level of airflow circulation, it can be ensured that each electrical component has airflow passing through, thus ensuring heat dissipation for each electrical component. In addition, the airflow circulation at each level is based on the heat exchanger 2 and expands radially to the periphery of the heat exchanger 2, which can ensure that the airflow can pass through the entire closed cavity 11, avoid local hot spot problems, and improve the heat dissipation effect of the electrical cabinet.

[0062] In some embodiments, the heat exchanger 2 described above may be as follows: Figure 1 , Figure 3 and Figure 4 The structure shown is described in the following document. Figure 1 , Figure 3 and Figure 4 The heat exchanger 2 is located on the upper half of the rear side panel of the cabinet 1; the internal circulation air outlet 21 and the internal circulation air return outlet 22 both face the front side panel of the cabinet 1, and the internal circulation air outlet 21 is located below the internal circulation air return outlet 22; the heat exchanger 2 also has an external circulation air inlet 23 and an external circulation air outlet 24 facing the outside respectively, and the external circulation air inlet 23 is located below the external circulation air outlet 24.

[0063] It should be noted that the aforementioned front, back, left, and right directions are based on the front door panel of cabinet 1 after installation. Generally, cabinet 1 is equipped with a front door panel (i.e., front side panel), which can be opened to allow maintenance of electrical components. An operation panel is also installed on the front door panel.

[0064] Since the heat exchanger 2 is preferably mounted on a side plate parallel to the width direction, it can be understood that the surface of the rear side plate is perpendicular to the length direction of the cabinet 1, and the surfaces of the left and right side plates are perpendicular to the width direction of the cabinet 1.

[0065] In this embodiment, the heat exchanger 2 is installed on the rear panel and can be shielded by the cabinet 1. Furthermore, both the external circulation air inlet 23 and the external circulation air outlet 24 face the rear of the cabinet 1, so they will not affect the operation of the front control panel.

[0066] Both the internal circulation air outlet 21 and the internal circulation return air outlet 22 face the front panel of the cabinet 1, and there is only one internal circulation return air outlet 22 and only one internal circulation air outlet 21.

[0067] Specifically, the circulating airflows at each stage within the enclosed cavity 11 enter the heat exchanger 2 through the inner circulation return air inlet 22, and after being cooled by heat exchange in the core, they enter the enclosed cavity 11 again through the inner circulation outlet 21. The external airflow enters the heat exchanger 2 through the outer circulation inlet 23, carries away heat after passing through the core to lower the core temperature, and then flows out of the heat exchanger 2 through the outer circulation outlet 24.

[0068] The internal circulation return air vent 22 is located above the internal circulation air outlet 21, conforming to the natural downward flow trend of cold air. The external circulation air inlet 23 is located below the external circulation air outlet 24, conforming to the natural upward flow trend of hot air.

[0069] Preferably, in order to ensure air outlet efficiency, an air outlet fan is provided at the internal circulation air outlet 21.

[0070] In some embodiments, the above-described airflow guide and electrical component assembly may employ, as follows: Figure 3 The structure shown is described in the following document. Figure 3 The multiple airflow guides include a first airflow guide 3, which is used to guide the airflow to form a first airflow circulation flow.

[0071] Specifically, the electrical component group includes a first air supply component 61, which is disposed in the upper half of the enclosed cavity 11 and located in front of the heat exchanger 2; the first airflow guide component 3 includes a wind guide assembly 31 and a wind baffle assembly 32, which is disposed in front of the first air supply component 61; one end of the wind guide assembly 31 is disposed between the internal circulation air outlet 21 and the internal circulation air return outlet 22, and the other end extends to the front side of the first air supply component 61.

[0072] In the front-to-back direction of the cabinet 1, the first air supply component 61 is directly opposite the internal circulation air outlet 21 and the internal circulation return air outlet 22. The cold air flowing out of the internal circulation air outlet 21 can directly reach the first air supply component 61 to dissipate heat. Preferably, the upper end of the first air supply component 61 is slightly higher than the internal circulation return air outlet 22, and the lower end is roughly aligned with the internal circulation air outlet 21.

[0073] The air guide assembly 31 is located between the internal circulation air outlet 21 and the internal circulation air return outlet 22, and the wind deflector assembly 32 is located in front of the first air element 61. The two work together to enable the airflow to complete the forward-upward-backward flow process.

[0074] Specifically, the cold air from the internal circulation outlet 21 first flows forward through the first air element 61, carrying away the heat of the first air element 61 and dissipating it. After encountering the wind deflector 32, the hot air flows upward and, under the action of the heat exchanger 2, flows backward through the first air element 61 again, carrying away the heat of the first air element 61 and dissipating it. Finally, it enters the internal circulation return air outlet 22 and enters the core for heat exchange, completing one cycle.

[0075] The air guide assembly 31 acts as a barrier between the internal circulation return air inlet 22 and the internal circulation air outlet 21, allowing the cool air to circulate instead of flowing directly upwards, thereby increasing the airflow path and improving heat dissipation efficiency. The air deflector assembly 32 changes the airflow direction, causing the airflow to turn back and flow backwards. Because the first air element 61 generates a large amount of heat, the air deflector assembly 32 works in conjunction with the air guide assembly 31 to ensure that the first airflow only passes through the first air element 61, thus improving the heat dissipation efficiency of the first air element 61.

[0076] In some embodiments, the first air element 61 and the air guide assembly 31 described above can be adopted as follows: Figure 1 and Figure 6 The structure shown is described in the following document. Figure 1 and Figure 6 The first air supply component 61 is distributed in multiple phases along the left and right directions of the cabinet 1, and each phase of the first air supply component 61 is attached to a heat sink; the enclosed cavity 11 is also provided with multiple sets of first air ducts 12 corresponding to the heat sinks, and the heat sinks are located in the corresponding first air ducts 12; a flow channel is formed between each pair of adjacent sets of first air ducts 12; there is a heat dissipation space between the multiple sets of first air ducts 12 and the rear panel of the cabinet 1.

[0077] The air guide assembly 31 includes a partition plate 311 horizontally arranged in the heat dissipation space and a plurality of air guide plates 312 respectively connected to the partition plate 311; the partition plate 311 is located between the internal circulation air outlet 21 and the internal circulation air return outlet 22; the plurality of air guide plates 312 are horizontally arranged in a plurality of flow channels in a corresponding manner.

[0078] The first gas element 61 is the main power device for realizing the function of the electrical cabinet. It is multi-phase, which can increase the output power of the electrical cabinet. In order to adapt to the circulation of the first airflow, the multi-phase first gas element 61 is distributed at intervals along the left and right directions of the cabinet body 1, and the main heating surface of each phase first gas element 61 is parallel to the front and back directions of the cabinet body 1.

[0079] Since the multiphase first air element 61 is distributed at intervals, a flow channel can be formed between each two adjacent first air ducts 12. In addition, there is also a ventilation gap between the leftmost first air element 61 and the left side panel of the cabinet 1. Each flow channel is connected to the internal circulation air outlet 21 and the internal circulation air return outlet 22 respectively. Part of the cold air output from the internal circulation air outlet 21 blows the heat-generating outer surface of each phase first air element 61 through each flow channel and ventilation gap, taking away the heat and ensuring uniform heat dissipation for each phase first air element 61.

[0080] Since the first gas component 61 is the main power device, it generates a lot of heat. In order to further improve its heat dissipation efficiency, the first gas component 61 is equipped with a separate heat sink. The heat sink is attached to the first gas component 61 and can remove the heat generated by the first gas component 61.

[0081] Specifically, the heat sink includes multiple spaced heat dissipation fins. The heat sink is generally a low-protection-level device and does not need to be installed in the closed cavity 11. Moreover, the heat sink needs to be constantly circulated with cold air to absorb heat. Therefore, the heat sink is installed in the first air duct 12, which is also located in the closed cavity 11, but is connected to the outside (the air inlet and air outlet of the first air duct 12 are respectively installed on the side panel of the cabinet 1). The outside cold air is introduced into the first air duct 12 and blows directly onto the heat sink to remove the heat from the first component 61.

[0082] Preferably, the air inlet of the first air duct 12 is located on the rear side panel of the cabinet 1, and the air outlet is located on the top panel and / or front side panel of the cabinet 1. Moreover, the air inlet of the first air duct 12 is located below the heat exchanger 2.

[0083] The air guiding assembly 31 includes a partition plate 311 and an air guide plate 312. The partition plate 311 is horizontally arranged in the heat dissipation space to block the internal circulation air outlet 21 and the internal circulation return air outlet 22, cutting off the upward airflow path and allowing the airflow to flow forward only after exiting the internal circulation air outlet 21. The air guide plate 312 is horizontally arranged in the flow channel to vertically block the flow channel, allowing the airflow to flow forward, upward, and backward, increasing the airflow path and improving the heat dissipation efficiency of the first air element 61.

[0084] Preferably, the air guide plate 312 is located at the center of the first air element 61 in the vertical direction, and the horizontal direction of the air guide plate 312 and the partition plate 311 is approximately parallel to the air outlet direction of the internal circulation air outlet 21. If the air outlet direction is inclined downward, then the air guide plate 312 and the partition plate 311 are inclined downward from back to front.

[0085] In some embodiments, the airflow guide and electrical component assembly described above may also employ, for example... Figure 4 The structure shown is described in the following document. Figure 4The lower end of the first air duct 12 extends to the bottom of the first air element 61 and the wind baffle assembly 32; the internal circulation air outlet 21 is inclined downward and faces each flow channel.

[0086] The multiple airflow guides also include a second airflow guide 4, which is used to guide the airflow to form a second airflow circulation flow; the second airflow guide 4 includes a guide fan 41; the guide fan 41 is arranged in front of each flow channel and below the wind baffle assembly 32; the air inlet of the guide fan 41 faces the rear side panel of the cabinet 1 and is inclined downward, and the air outlet faces the front side panel of the cabinet 1 and is inclined upward.

[0087] The electrical component group also includes a second air supply component 62, which is located in front of the wind deflector assembly 32 and directly opposite the air outlet of the guide fan 41.

[0088] Since the first air element 61 is located in the upper part of the enclosed cavity 11, slightly towards the middle and rear, and the wind baffle assembly 32 is located in front of the first air element 61, the first airflow circulation is blocked by the wind baffle assembly 32 and will not flow forward. In order to avoid empty space in front of the first air element 61, a second air element 62 is set in front of the first air element 61 to make full use of the space of the enclosed cavity 11.

[0089] Since the second air element 62 is located in front of the wind deflector assembly 32, and the wind deflector assembly 32 blocks the first airflow circulation, the first airflow circulation will not pass through the second air element 62. Therefore, with only the first-stage airflow circulation, the second air element 62 cannot dissipate heat. To accommodate the position of the second air element 62 and solve its heat dissipation problem, a guide fan 41 is installed in front of each flow channel and below the wind deflector assembly 32. The guide fan 41 is used to create a second airflow circulation to dissipate heat from the second air element 62.

[0090] Preferably, the lower end of the second air element 62 is slightly lower than the lower end of the first air element 61, but higher than the first air duct 12; the upper end of the second air element 62 is slightly lower than the upper end of the first air element 61. The air outlet of the guide fan 41 is directly opposite the lower end face of the second air element 62.

[0091] Specifically, the internal circulation air outlet 21 is tilted downwards, and the cold air is output tilted downwards. Some of the cold air will be concentrated in the lower part of each flow channel (i.e. the part extending to the lower part of the first air element 61) and pass through. The guide fan 41 is also tilted, which can absorb the cold air passing through the lower part of each flow channel and blow it upwards directly to the second air element 62 to dissipate heat from the second air element 62.

[0092] In addition, under the action of heat exchanger 2, the second airflow will also flow backward through the upper part of each flow channel (that is, the part located above the wind baffle assembly 32). In other words, the airflow passing through the second air element 62 will also pass through the first air element 61, further dissipating heat from the first air element 61.

[0093] It should be noted that the heat generated by the second gas component 62 is less than that of the first gas component 61, which is a high-heat-generating module.

[0094] By placing the second air element 62 directly in front of the first air element 61, the space of the enclosed cavity 11 can be fully utilized, and it is also convenient to make electrical connections with the first air element 61 and other power devices or electrical components. Moreover, the second air element 62 uses the guide fan 41 for heat dissipation, which can solve the problem that the second air element 62 cannot dissipate heat when it is facing away from the first airflow circulation. The guide fan 41 is set at an angle, and the air inlet and outlet do not face the first air element 61, which can avoid interference between the second airflow circulation and the first airflow circulation.

[0095] In some embodiments, the windbreak assembly 32 may employ, for example... Figure 2 and Figure 3 The structure shown is described in the following document. Figure 2 and Figure 3 The wind deflector assembly 32 is a mounting base for the second air element 62; the lower end of the second air element 62 is lower than the lower end of the first air element 61; the upper end of the first air element 61 is higher than the upper end of the second air element 62; the upper end of the mounting base extends upward relative to the upper end of the second air element 62 and is aligned with the upper end of the first air element 61, and the lower end of the mounting base is aligned with the lower end of the second air element 62; the upwardly extending part of the mounting base has air passage holes 321 that communicate with each flow channel.

[0096] The windbreak assembly 32 serves as a mounting base, which can be combined with the second air element 62 to provide a supporting foundation for the installation of the second air element 62 and reduce the space occupied by the windbreak assembly 32, so as to facilitate the electrical connection between the second air element 62 and the first air element 61 or other electrical components, and make the layout of the electrical component group reasonable.

[0097] In addition, the mounting substrate is attached to the second gas component 62, and the lower end of the mounting substrate is aligned with the lower end of the second gas component 62. That is to say, the lower end of the mounting substrate also extends downward relative to the lower end of the first gas component 61. The mounting substrate and the lower extension of each flow channel are aligned front and back. Then, some of the cold air passing through the lower part of each flow channel (i.e. the part extending out of the first gas component 61) will directly impact the lower part of the mounting substrate. The lower part of the mounting substrate can also absorb some of the cold air. Thus, the mounting substrate can serve as a heat sink for the second gas component 62, exchanging heat for the second gas component 62, thereby increasing the heat dissipation method of the second gas component 62 and improving the heat dissipation efficiency of the second gas component 62.

[0098] The upper end of the mounting base extends upward relative to the upper end of the second air element 62, and the extended part has air holes 321 that communicate with each flow channel. Then the airflow of the second airflow circulation will also concentrate in the upper part of each flow channel (that is, the part located above the wind baffle assembly 32), blow over the first air element 61, and further dissipate heat from the first air element 61.

[0099] In some embodiments, the first gas component 61 described above can be as follows: Figure 3 The structure shown is described in the following document. Figure 3 The first air element 61 includes an upper air element 611 and a lower air element 612. The upper air element 611 is located above the air guide plate 312 and corresponds to the air passage 321. The heat generation of the upper air element 611 is greater than that of the lower air element 612.

[0100] For the first air element 61, the first airflow circulates and blows on its entire heated outer surface, while the second airflow circulates and blows on its upper surface through the air passage 321. Therefore, the airflow received by the upper part of the first air element 61 is greater than that received by the lower part. In order to make reasonable use of the airflow in different spaces, this embodiment divides the first air element 61 into an upper sub-air element 611 and a lower sub-air element 612, and makes the upper sub-air element 611, which generates more heat, correspond to the air passage 321. Then the upper sub-air element 611 can receive the airflow of the first airflow circulation and the airflow of the second airflow circulation. Although the upper sub-air element 611 generates more heat, it also receives more airflow, thereby ensuring that the first air element 61 dissipates heat evenly as a whole.

[0101] In some embodiments, the airflow guide and electrical component assembly described above may also employ, for example... Figure 5 The structure shown is described in the following document. Figure 5The system includes multiple airflow guides, including a third airflow guide 5, which guides the airflow to form a third airflow circulation. The internal circulation air outlet 21 is inclined downward. The third airflow guide 5 includes a supply fan 51 and a first exhaust fan 52. The supply fan 51 is located in front of and below the internal circulation air outlet 21, with its outlet facing the lower side panel of the cabinet 1. The first exhaust fan 52 is located at the lower front corner of the enclosed cavity 11. The inlet of the first exhaust fan 52 faces the rear side panel of the cabinet 1.

[0102] The electrical component group includes a third air element 63 and a fourth air element 64; the third air element 63 is located in the rear half of the enclosed cavity 11 and is directly opposite the air outlet of the blower 51; the fourth air element 64 is located in the front half of the enclosed cavity 11 and is aligned with the air inlet of the first exhaust fan 52.

[0103] The air supply fan 51 has its outlet facing the lower side panel of the cabinet 1, so the air supply fan 51 is used to supply air to the lower part of the cabinet 1. The first exhaust fan 52 is located at the lower front part of the enclosed cavity 11, and its inlet faces the rear side panel of the cabinet 1, so the first exhaust fan 52 is used to exhaust air to the front part of the cabinet 1.

[0104] Specifically, the air supply fan 51 is located directly below the multiple first air ducts 12. The downward-sloping cold air output from the internal circulation air outlet 21 is collected in each flow channel. Under the action of the air supply fan 51, some of the cold air flows downward in the rear half of the closed cavity 11. Under the action of the first exhaust fan 52, it is drawn to the lower front half of the closed cavity 11. According to the natural upward law of hot air flow and the action of the heat exchanger 2, the air flow that reaches the lower front half of the closed cavity 11 will also flow upward and backward, and finally return to the internal circulation return air outlet 22.

[0105] The third airflow circulation flows through the lower rear half, lower front half, upper front half and first air element 61 of the closed cavity 11. In particular, it can flow fully through the lower half of the closed cavity 11. Therefore, other power devices can be arranged in the lower half of the closed cavity 11 to make full use of the space of the closed cavity 11 and solve the problem of local hot spots.

[0106] In addition, when the airflow of the third airflow circulation flows back to the internal circulation return air port 22, it will also pass through the second air element 62 and the first air element 61, which can also dissipate heat from the second air element 62 and the first air element 61 to improve the heat dissipation efficiency.

[0107] In the path of the third airflow circulation, since the third air element 63 is located upstream of the fourth air element 64, the heat generated by the third air element 63 is less than the heat generated by the fourth air element 64.

[0108] The third air element 63 is directly opposite the air outlet of the blower 51, and cold air can be directly directed to the third air element 63. Since the third air element 63 generates less heat, the temperature rise range after the cold air passes through it is small; the fourth air element 64 is directly opposite the air inlet of the first exhaust fan 52, and the fourth air element 64 can also receive cold air at a relatively low temperature.

[0109] In addition, since the first exhaust fan 52 is located in front of the guide fan 41, the exhaust fan 52 can create a negative pressure in the lower half of the closed cavity 11, which can absorb some of the cold air in the second airflow circulation, increase the amount of cold air passing through the fourth air element 64, and improve the heat dissipation efficiency.

[0110] It should be noted that the air supply fan 51 is a speed-regulating fan, which can adjust the air volume according to the temperature at the second air element 62 and the temperatures at the third and fourth air elements 63 and 64. Specifically, each of the second air element 62, the third air element 63, and the fourth air element 64 is equipped with a temperature sensor to monitor the temperature at each air element in real time and transmit the monitoring data to the control system of the electrical cabinet; the control system controls the air supply fan 51's air speed based on the temperature monitoring values.

[0111] If the temperature at the second air element 62 is higher than the preset value, the control system controls the exhaust speed of the blower 51 to decrease, and correspondingly, the airflow of the second airflow circulation will increase to increase the air volume passing through the second air element 62; if the temperature at the third air element 63 and / or the fourth air element 64 is higher than the preset value, the control system controls the exhaust speed of the blower 51 to increase, and correspondingly, the airflow of the third airflow circulation will increase to increase the air volume passing through the third air element 63 and the fourth air element 64.

[0112] In some embodiments, the cabinet 1 described above may also adopt the following: Figure 1 The structure shown is described in the following document. Figure 1 The inner side of the front panel of the cabinet 1 is provided with a sealing plate 13, which together with the front panel of the cabinet 1 forms a vertical channel 14. The air inlet of the vertical channel 14 is connected to the air outlet of the first exhaust fan 52. The air outlet of the vertical channel 14 is located above the air inlet of the vertical channel 14. The hot air flowing through the vertical channel 14 can exchange heat through the front panel of the cabinet 1.

[0113] The sealing plate 13 is located behind the front side panel of the cabinet 1. With the help of the sealing plate 13 and the front side panel of the cabinet 1, a vertical channel 14 can be formed. The vertical channel 14 has air intake at the bottom and air outlet at the top, which conforms to the natural trend of hot air flowing upward.

[0114] As the first exhaust fan 52 draws air, a negative pressure is formed in the lower space of the cabinet 1, causing the airflow in the lower half to flow forward. The first exhaust fan 52 can also send some of the heated airflow into the vertical channel 14. Since the front panel of the cabinet 1 faces the outside directly, the airflow can transfer heat outward through the front panel when passing through the vertical channel 14, thereby reducing the temperature of the airflow return.

[0115] After the airflow is cooled by passing through the vertical channel 14, it flows back to the internal circulation return air inlet 22. Since the air outlet of the vertical channel 14 is located above the air inlet of the vertical channel 14, the return air path of the third airflow circulation can be changed by reasonably determining the height of the air outlet of the vertical channel 14.

[0116] Specifically, the position of the air outlet of the vertical channel 14 is determined according to the heat generated by the second air element 62. If the heat generated by the second air element 62 is small, and the airflow of the second air circulation is sufficient to dissipate heat from the second air element 62, then the position of the air outlet of the vertical channel 14 can be increased, and the air outlet directly faces the first air element 61, and the return air path of the third air circulation does not pass through the second air element 62. If the heat generated by the second air element 62 is large, and the heat dissipation effect of the second air circulation on the second air element 62 does not reach the preset target, then the position of the air outlet of the vertical channel 14 can be lowered, and the air outlet faces the second air element 62. If the heat generated by the second air element 62 is between the above two cases, then the air outlet of the vertical channel 14 can be directed towards the upper part of the second air element 62.

[0117] During this journey, it passes through the upper part of the second gas element 62 and the upper part of the first gas element 61, and can also dissipate heat from the second gas element 62 and the first gas element 61.

[0118] Accordingly, for the first gas element 61, the first airflow circulates and blows on its entire heated outer surface, while the second and third airflow circulate and blow on its heated upper surface. All three airflow circulations can dissipate heat from the first gas element 61, thereby improving its heat dissipation effect.

[0119] For the second air element 62, the first airflow circulates and impacts the windshield assembly 32, which can serve as a heat exchange substrate for the second air element 62. The second and third airflow circulates through the second air element 62, and all three airflow circulates can dissipate heat from the second air element 62, thereby improving its heat dissipation effect.

[0120] Since the airflow exchanges heat after passing through the vertical channel 14, the heat generated by the second air element 62 can be less than that of the fourth air element 64. Therefore, the second air element 62 is not limited by the fourth air element 64, and the device corresponding to the second air element 62 can be reasonably selected according to the electrical connection relationship with the first air element 61.

[0121] In some embodiments, the third airflow guide 5 may also employ, for example... Figure 5 The structure shown is described in the following document. Figure 5 The third airflow guide 5 also includes a second exhaust fan 53, which is located in the front half of the enclosed cavity 11 and above the first exhaust fan 52. The air inlet of the second exhaust fan 53 is aligned with the air outlet of the vertical channel 14, and the air outlet of the second exhaust fan 53 faces the internal circulation return air port 22.

[0122] The second exhaust fan 53 is located directly in front of the second air element 62 and is inclined relative to the second air element 62. It can deliver air to the second air element 62 and the first air element 61. The second exhaust fan 53 can accelerate the airflow speed in the vertical channel 14 and the enclosed cavity 11, and improve the heat dissipation efficiency of the third sequential flow.

[0123] In some embodiments, the above-described electrical component group may also employ, for example... Figure 1 The structure shown is described in the following document. Figure 1 The enclosed cavity 11 is also provided with a second air duct 15, which is located in the lower half of the enclosed cavity 11 and is connected to the outside. The electrical component group also includes low-protection components installed in the second air duct 15.

[0124] Low-protection components are generally large and heavy modules that generate a lot of heat, but their protection requirements are not high. Therefore, it is not necessary to put the low-protection components into the closed cavity 11. Instead, the low-protection components are placed at the bottom of the cabinet 1 and covered with a second air duct 15 to make reasonable use of the load-bearing structure of the entire cabinet 1 and increase the stability of the low-protection components inside the cabinet 1.

[0125] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electrical cabinet, characterized in that The application relates to a cabinet body (1) with a closed cavity (11), an electric element group arranged in the closed cavity (11), the electric element group comprising a first electric element (61) and a second electric element (62), a heat exchanger (2) arranged on the upper half of the rear side plate of the cabinet body (1), the heat exchanger (2) having an inner circulation air outlet (21) and an inner circulation air return (22) respectively facing the closed cavity (11), and a plurality of groups of air flow guides arranged in the closed cavity (11) respectively, the air flow guides comprising a first air flow guide (3) and a second air flow guide (4), the first air flow guide (3) comprising a wind blocking assembly (32), and the second air flow guide (4) comprising a flow guide fan (41). The first electric element (61) is arranged in the upper half of the closed cavity (11) and located in front of the heat exchanger (2), the wind blocking assembly (32) is arranged in front of the first electric element (61), the flow guide fan (41) is arranged below the wind blocking assembly (32) and in front of and below the first electric element (61), and the second electric element (62) is located in front of the wind blocking assembly (32) and opposite to the air outlet end of the flow guide fan (41). The cold air output by the inner circulation air outlet (21) forms a plurality of stages of air flow circulation flows which do not interfere with each other under the action of the air flow guides, and the air flow circulation flows are combined into the heat exchanger (2) for heat exchange at the inner circulation air return (22), the first air flow guide (3) is used for guiding air flow to form a first air flow circulation flow, the first electric element (61) is distributed on the path of the first air flow circulation flow, the second air flow guide (4) is used for guiding air flow to form a second air flow circulation flow, and the second electric element (62) is distributed on the path of the second air flow circulation flow. The inner circulation air outlet (21) and the inner circulation air return (22) are both towards the front side plate of the cabinet body (1), and the inner circulation air outlet (21) is located below the inner circulation air return (22). The heat exchanger (2) further has an outer circulation air inlet (23) and an outer circulation air outlet (24) respectively facing the outside, and the outer circulation air inlet (23) is located below the outer circulation air outlet (24). The first air flow guide (3) further comprises a wind guide assembly (31), one end of the wind guide assembly (31) is arranged between the inner circulation air outlet (21) and the inner circulation air return (22), and the other end of the wind guide assembly (31) extends to the front side of the first electric element (61).

2. The electrical cabinet of claim 1, wherein, The first electric element (61) is distributed in a plurality of phases along the left-right direction of the cabinet body (1), and a radiator is connected to each phase of the first electric element (61). ​ 3. The electrical cabinet of claim 2, wherein, ​ 4. The electrical cabinet of claim 3, wherein, ​ A plurality of first air ducts (12) corresponding to the heat sinks are arranged in the closed cavity (11), and the heat sinks are arranged in the corresponding first air ducts (12); a flow passage is formed between every two adjacent first air ducts (12); and a heat dissipation space is formed between the plurality of first air ducts (12) and the rear side plate of the cabinet (1); The air guide assembly (31) comprises a partition plate (311) horizontally arranged in the heat dissipation space and a plurality of air guide plates (312) respectively connected to the partition plate (311); the partition plate (311) is arranged between the inner circulation air outlet (21) and the inner circulation air return (22); and the plurality of air guide plates (312) are horizontally arranged in the plurality of flow passages one by one.

5. The electrical cabinet of claim 4, wherein, The lower end of the first air duct (12) extends below the first component (61) and the air blocking assembly (32); The inner circulation air outlet (21) is arranged obliquely downward and faces each flow passage; The air guide fan (41) is further arranged in front of each flow passage; the air inlet end of the air guide fan (41) faces the rear side plate of the cabinet (1) and is obliquely downward, and the air outlet end faces the front side plate of the cabinet (1) and is obliquely upward.

6. The electrical cabinet of claim 5, wherein, The air blocking assembly (32) is a mounting base plate of the second component (62); The lower end of the second component (62) is lower than the lower end of the first component (61); and the upper end of the first component (61) is higher than the upper end of the second component (62); The upper end of the mounting base plate extends upward relative to the upper end of the second component (62) and is aligned with the upper end of the first component (61); the lower end of the mounting base plate is aligned with the lower end of the second component (62); and the upward extending part of the mounting base plate has a wind passage hole (321) communicating with each flow passage.

7. The electrical cabinet of claim 6, wherein, The first component (61) comprises an upper sub-component (611) and a lower sub-component (612); the upper sub-component (611) is arranged above the air guide plate (312) and corresponds to the wind passage hole (321) in front and behind; and the heat generation of the upper sub-component (611) is greater than that of the lower sub-component (612).

8. The electrical cabinet of claim 2, wherein, The inner circulation air outlet (21) is arranged obliquely downward; The plurality of airflow guides comprise a third airflow guide (5) for guiding airflow to form a third airflow circulation flow; The third airflow guide (5) comprises a supply fan (51) and a first exhaust fan (52); the supply fan (51) is arranged below and in front of the inner circulation air outlet (21) and has an air outlet end facing the lower side plate of the cabinet (1); the first exhaust fan (52) is arranged at the lower front corner of the closed cavity (11); and the air inlet end of the first exhaust fan (52) faces the rear side plate of the cabinet (1). The electrical element group comprises a third electrical element (63) and a fourth electrical element (64); the third electrical element (63) is located at the rear half of the closed cavity (11) and faces the air outlet end of the air supply fan (51); the fourth electrical element (64) is located at the front half of the closed cavity (11) and is aligned with the air inlet end of the first air extraction fan (52).

9. The electrical cabinet of claim 8, wherein, The inner side of the front side plate of the cabinet (1) is provided with a sealing plate (13), which forms a vertical channel (14) with the front side plate of the cabinet (1); The air inlet end of the vertical channel (14) is communicated with the air outlet end of the first air extraction fan (52); the air outlet end of the vertical channel (14) is located above the air inlet end of the vertical channel (14); The hot air flowing through the vertical channel (14) can exchange heat through the front side plate of the cabinet (1).

10. The electrical cabinet of claim 9, wherein, The third air flow guide (5) further comprises a second air extraction fan (53), which is arranged at the front half of the closed cavity (11) and above the first air extraction fan (52); the air inlet end of the second air extraction fan (53) is aligned with the air outlet end of the vertical channel (14), and the air outlet end faces the inner circulating return air outlet (22).

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