Electrical cabinet

Abstract

The invention provides an electrical cabinet, which belongs to the technical field of electrical equipment and comprises a cabinet body, a heat exchanger, a plurality of groups of airflow guide pieces and an electrical element group. The cabinet body is provided with a closed cavity; the heat exchanger is arranged on a side plate of the cabinet body and is provided with an internal circulation air outlet and an internal circulation air return opening; the plurality of groups of airflow guide pieces are respectively arranged in the closed cavity; cold air output by the internal circulation air outlet forms non-interfering multi-stage airflow circulation flow under the action of the airflow guide pieces, and the airflow circulation flow of all stages converges in the internal circulation air return opening and enters the heat exchanger for heat exchange. The circular flowing path of each stage of airflow is radially expanded and distributed towards the periphery of the heat exchanger by taking the heat exchanger as a reference; and the electrical element groups are distributed on the circular flowing path of each stage of airflow. Multi-stage airflow circulation flow is formed in the closed cavity, it can be ensured that airflow passes through all the electrical elements, it is ensured that all the electrical elements are cooled, and the problem of local hot spots is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment, and more specifically, relates to an electrical cabinet. Background Art

[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, only closed heat dissipation can be used for the electrical cabinets.

[0003] In the prior art, in order to improve the heat dissipation efficiency of the electrical cabinet, an air-to-air heat exchanger is installed on the door panel of the electrical cabinet to conduct heat to remove the heat inside the electrical cabinet. However, for electrical cabinets with larger spaces, some power devices are far away from the air-to-air heat exchanger, which may cause local hot spots and result in poor overall heat dissipation of the electrical cabinet. Summary of the invention

[0004] The object of the present invention is to provide an electrical cabinet, aiming to solve the technical problems existing in the prior art that electrical cabinets with a larger space have local hot spots and poor heat dissipation effect.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide an electrical cabinet, comprising: The cabinet has a closed cavity; an electrical component group is arranged in the closed cavity; A heat exchanger is arranged on a side plate of the cabinet; the heat exchanger has an inner circulation air outlet and an inner circulation air return outlet facing the closed cavity respectively; and A plurality of groups of airflow guides are respectively arranged in the closed cavity; Wherein, the cold air outputted from the inner circulation air outlet forms a multi-stage airflow circulation flow that does not interfere with each other under the action of each group of the airflow guides, and the airflow circulation flows of each stage converge at the inner circulation return air outlet and enter the heat exchanger for heat exchange; The paths of the airflow circulation at each level are based on the heat exchanger and are radially expanded toward the periphery of the heat exchanger; the electrical component groups are distributed on the paths of the airflow circulation at each level.

[0006] In a possible implementation, the heat exchanger is arranged on the upper half of the rear side plate of the cabinet; the internal circulation air outlet and the internal circulation air return outlet are both facing the front side plate of the cabinet, and the internal circulation air outlet is located below the internal circulation air return outlet; The heat exchanger also has an external circulation air inlet and an external circulation air outlet facing the outside respectively, and the external circulation air inlet is located below the external circulation air outlet.

[0007] In a possible implementation, the plurality of groups of airflow guides include a first airflow guide, and the first airflow guide is used to guide the airflow to form a first airflow circulation flow; The electrical component group includes a first component, which is arranged in the upper half of the closed cavity and in front of the heat exchanger; The first airflow guide includes an air guide component and a wind shield component, and the wind shield component is arranged in front of the first energy component; one end of the air guide component is arranged 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 energy component.

[0008] In some embodiments, the first energy components are distributed in multiple phases at intervals along the left-right direction of the cabinet, and each phase of the first energy components is closely connected to a radiator; The closed cavity is further provided with a plurality of first air ducts corresponding to the radiators one by one, and the radiators are located in the corresponding first air ducts; a flow passage is formed between each two adjacent groups of the first air ducts; and a heat dissipation space is provided between the plurality of first air ducts and the rear side plate of the cabinet; The air guide assembly includes a partition plate horizontally arranged in the heat dissipation space and a plurality of air guide 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 guide plates are horizontally arranged one by one in the plurality of flow channels.

[0009] In some embodiments, the lower end of the first air duct extends to below the first gas component and the wind shielding assembly; The inner circulation air outlet is arranged obliquely downward and toward each of the flow passages; The plurality of groups of airflow guides further include a second airflow guide, wherein the second airflow guide is used to guide the airflow to form a second airflow circulation flow; The second airflow guide comprises a guide fan; the guide fan is arranged in front of each of the flow passages and below the wind shielding assembly; the air inlet end of the guide fan faces the rear side plate of the cabinet and is inclined downward, and the air outlet end faces the front side plate of the cabinet and is inclined upward; The electrical component group also includes a second gas component, which is located in front of the wind shield assembly and directly faces the air outlet end of the guide fan.

[0010] In some embodiments, the windshield assembly is a mounting substrate for the second element; The lower end of the second element is lower than the lower end of the first element; the upper end of the first element is higher than the upper end of the second element; The upper end of the mounting substrate extends upward relative to the upper end of the second component and is aligned with the upper end of the first component, and the lower end of the mounting substrate is aligned with the lower end of the second component; the upwardly extending portion of the mounting substrate has air holes connected to each of the flow channels.

[0011] In some embodiments, the first component includes an upper sub-component and a lower sub-component, the upper sub-component is located above the air guide plate and corresponds to the front and rear of the air hole; the heat generated by the upper sub-component is greater than the heat generated by the lower sub-component.

[0012] In a possible implementation, the internal circulation air outlet is arranged to be inclined downward; The plurality of groups of airflow guides include a third airflow guide, and the third airflow guide is used to guide the airflow to form a third airflow circulation flow; The third airflow guide comprises an air supply fan and a first air exhaust fan; the air supply fan is arranged at the front lower part of the internal circulation air outlet, and the air outlet end faces the lower side plate of the cabinet; the first air exhaust fan is arranged at the front lower corner point of the closed cavity; the air inlet end of the first air exhaust fan faces the rear side plate of the cabinet; The electrical component group includes a third component and a fourth component; the third component is located in the rear half of the closed cavity and is opposite to the air outlet of the air supply fan; the fourth component is located in the front half of the closed cavity and is aligned with the air inlet of the first exhaust fan.

[0013] In some embodiments, a sealing plate is provided on the inner side of the front side plate of the cabinet, and the sealing plate and the front side plate of the cabinet form a vertical channel; The air inlet end of the vertical channel is connected to the air outlet end of the first exhaust fan; the air outlet end of the vertical channel is located above the air inlet end of the vertical channel; The hot air flowing through the vertical channel can exchange heat through the front side plate of the cabinet.

[0014] In some embodiments, the third air flow guide also includes a second exhaust fan, which is arranged in the front half of the closed cavity and above the first exhaust fan; the air inlet end of the second exhaust fan is aligned with the air outlet end of the vertical channel, and the air outlet end faces the internal circulation return air outlet.

[0015] The beneficial effect of the electrical cabinet provided by the present invention is that: compared with the prior art, the electrical cabinet of the present invention is provided with multiple groups of airflow guides in the closed cavity of the cabinet body, which are used to guide the airflow to form a multi-stage airflow circulation flow in the closed cavity. Since the electrical component groups are distributed on the paths of the airflow circulation flows at each stage, it can be ensured that each electrical component has airflow passing through, thereby ensuring the heat dissipation of each electrical component; in addition, the airflow circulation flows at each stage are based on the heat exchanger and are radially expanded toward the periphery of the heat exchanger, thereby ensuring that the airflow can pass through the entire closed cavity, avoiding local hot spot problems, and improving the heat dissipation effect of the electrical cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of an electrical cabinet provided in an embodiment of the present invention (the left side panel of the cabinet is not shown in the figure); Figure 2 for Figure 1 The main view of (the three dotted lines in the figure represent the paths of multi-stage airflow circulation); Figure 3 A schematic structural diagram of an electrical component group and an airflow guide corresponding to a first airflow circulation flow of an electrical cabinet provided in an embodiment of the present invention; Figure 4 A schematic structural diagram of an electrical component group and an airflow guide corresponding to a second airflow circulation flow of an electrical cabinet provided by an embodiment of the present invention; Figure 5 A schematic diagram of the structure of an electrical component group and an airflow guide corresponding to the third airflow circulation flow of an electrical cabinet provided by an embodiment of the present invention; Figure 6 A schematic structural diagram of an air guide assembly of an electrical cabinet provided in an embodiment of the present invention.

[0018] In the figure: 1. Cabinet; 11. Enclosed cavity; 12. First air duct; 13. Closing plate; 14. Vertical channel; 15. Second air duct; 2. Heat exchanger; 21. Internal circulation air outlet; 22. Internal circulation air return outlet; 23. External circulation air inlet; 24. External circulation air outlet; 3. first airflow guide; 31. air guide assembly; 311. partition plate; 312. air guide plate; 32. wind shield assembly; 321. air hole; 4. A second airflow guide; 41. A guide fan; 5. a third air flow guide; 51. an air supply fan; 52. a first air exhaust fan; 53. a second air exhaust fan; 61. The first sub-vitamin component; 611. The upper sub-vitamin component; 612. The lower sub-vitamin component; 62. The second sub-vitamin component; 63. The third sub-vitamin component; 64. The fourth sub-vitamin component. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] Please also read Figure 1 and Figure 2 The electrical cabinet provided by the present invention is now described. The electrical cabinet comprises a cabinet body 1, a heat exchanger 2, a plurality of airflow guides and an electrical component group. The cabinet body 1 has a closed cavity 11; the heat exchanger 2 is arranged on a side plate of the cabinet body 1; the heat exchanger 2 has an inner circulation air outlet 21 and an inner circulation air return port 22 facing the closed cavity 11 respectively. The plurality of airflow guides are respectively arranged in the closed cavity 11.

[0021] Among them, the cold air output from the internal circulation air 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 and enter the heat exchanger 2 for heat exchange; the path of the airflow circulation flow of each level is based on the heat exchanger 2 and expands radially toward the periphery of the heat exchanger 2; the electrical component groups are distributed on the path of the airflow circulation flow of each level.

[0022] The cabinet 1 is a rectangular parallelepiped structure, which is composed of a front side panel, a rear side panel, a left side panel, a rear side panel, a top panel, a bottom panel, and a support frame connecting and supporting the above panels. The cabinet 1 has a closed cavity 11, which can be understood as the above six panels of the cabinet 1 can enclose the closed cavity 11, or the above six panels of the cabinet 1 cooperate with other panels in the cabinet 1 to enclose the closed cavity 11. The closed cavity 11 is not connected to the outside world, so that the closed cavity 11 has high sealing performance and high protection level, which can enable the electrical cabinet to be used in harsh environments such as high temperature, high humidity, and high dust, and meet the use requirements of the electrical component group.

[0023] Since the airflow needs to form an air circulation flow in the closed cavity 11 and the airflow needs to pass through the heat exchanger 2 for heat exchange, in order to increase the path of the air circulation flow and reasonably allocate the layout position of the electrical component group, the sequential flow generally flows through the length direction and the up and down direction of the closed cavity 11.

[0024] The heat exchanger 2 is mounted on the side panel of the cabinet 1. In order to cooperate with the circulation of air flow, 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 port 22. The circulating air flows of each level in the closed cavity 11 enter the heat exchanger 2 through the internal circulation air return port 22 respectively, and after heat exchange and cooling by the heat exchange core, enter the closed cavity 11 from the internal circulation air outlet 21.

[0025] The heat exchanger 2 is preferably an air-to-air heat exchanger having a heat exchange core. The heat exchanger 2 can introduce cold air from the outside and can also recover hot air from the closed cavity 11. After passing through the heat exchange core, the cold air from the outside takes away the heat of the hot air in the closed cavity 11 passing through the heat exchange core, 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 counteract each other.

[0026] The multiple groups of airflow guides are used to guide the airflow to form a multi-stage airflow circulation flow in the closed cavity 11. The multi-stage airflow guides can be in the form of a fan combination, or in the form of a wind guide plate combination to isolate the air guide channel, or in the form of a fan combination plus a wind guide plate combination. The specific form of the multi-stage airflow guide is not limited in this embodiment, as long as it can form a multi-stage airflow circulation flow in the closed cavity 11. The airflows of the airflow circulation flow at each level do not interfere with each other, and each can lead to the heat exchanger 2, and after heat exchange in the heat exchanger 2, enter the closed cavity 11 again.

[0027] The multi-stage airflow circulation flow is based on the heat exchanger 2 and is radially expanded toward the periphery of the heat exchanger 2. It can be understood that the path of the secondary airflow circulation flow is located outside the path of the primary airflow circulation flow, and the path of the tertiary airflow circulation flow is located outside the path of the secondary airflow circulation flow; the airflow circulation flows at each stage do not interfere with each other, and even if any set of airflow guides are removed, it will not affect the airflow circulation flows at other stages. Therefore, this embodiment can flexibly arrange the internal electrical components according to the functions of the electrical cabinet.

[0028] The electrical component group is generally a power device with a high protection level, and it will emit heat when working. In addition, some power devices have high heat generation, and the heat cannot be dissipated by the heat conduction of the cabinet 1 itself, so the heat needs to be taken away by air flow. The electrical component group is determined according to the functional model of the electrical cabinet. When arranging, the electrical component group needs to be distributed on the path of the circulation flow of each level of air flow.

[0029] Compared with the prior art, the electrical cabinet provided by the present invention has multiple groups of airflow guides arranged in the closed cavity 11 for guiding the airflow to form a multi-stage airflow circulation flow. Since the electrical component groups are distributed on the paths of the airflow circulation flows at each stage, it can be ensured that airflow passes through each electrical component to ensure heat dissipation of each electrical component. In addition, the airflow circulation flows at each stage are based on the heat exchanger 2 and are radially expanded toward the periphery of the heat exchanger 2, which can ensure that the airflow can pass through the entire closed cavity 11, avoid local hot spots, and improve the heat dissipation effect of the electrical cabinet.

[0030] In some embodiments, the heat exchanger 2 may be used as follows: Figure 1 , Figure 3 and Figure 4 The structure shown, see Figure 1 , Figure 3 and Figure 4 The heat exchanger 2 is arranged in the upper half of the rear side plate of the cabinet 1; the internal circulation air outlet 21 and the internal circulation return air outlet 22 are both facing the front side plate of the cabinet 1, and the internal circulation air outlet 21 is located below the internal circulation return air 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.

[0031] It should be noted that the above-mentioned limitations on the front, back, left, and right directions are based on the front door panel of the cabinet 1 after installation. Generally, the cabinet 1 is provided with a front door panel (i.e., a front side panel), which can be opened to maintain the electrical components. An operation panel is also provided on the front door panel.

[0032] Since the heat exchanger 2 is preferably mounted on a side panel parallel to the width direction, it can be understood that the surface of the rear side panel is perpendicular to the length direction of the cabinet 1 , and the surface of the left and right side panels are perpendicular to the width direction of the cabinet 1 .

[0033] The heat exchanger 2 of this embodiment is arranged on the rear side plate and can be shielded by the cabinet 1, and the external circulation air inlet 23 and the external circulation air outlet 24 are both facing the rear of the cabinet 1, which will not affect the operation of the front control panel.

[0034] The internal circulation air outlet 21 and the internal circulation air return outlet 22 are both facing the front side plate of the cabinet 1 , and there is only one internal circulation air return outlet 22 and only one internal circulation air outlet 21 .

[0035] Specifically, the circulating airflows at each level in the closed cavity 11 enter the heat exchanger 2 through the inner circulation return air port 22, and after heat exchange and cooling in the core, enter the closed cavity 11 from the inner circulation air outlet 21. The external airflow enters the heat exchanger 2 from the outer circulation air inlet 23, takes away the heat after passing through the core to reduce the temperature of the core, and then flows out of the heat exchanger 2 from the outer circulation air outlet 24.

[0036] The inner circulation return air vent 22 is located above the inner circulation air outlet 21, which is in line with the natural downward flow trend of cold air. The outer circulation air inlet 23 is located below the outer circulation air outlet 24, which is in line with the natural upward flow trend of hot air.

[0037] Preferably, in order to ensure air outlet efficiency, an air outlet fan is provided at the internal circulation air outlet 21 .

[0038] In some embodiments, the airflow guide and the electrical component group may be configured as follows: Figure 3 The structure shown, see Figure 3 The multiple groups of airflow guides include a first airflow guide 3, and the first airflow guide 3 is used to guide the airflow to form a first airflow circulation flow.

[0039] Specifically, the electrical component group includes a first air component 61, which is arranged in the upper half of the closed cavity 11 and in front of the heat exchanger 2; the first air flow guide 3 includes an air guide component 31 and a wind shield component 32, and the wind shield component 32 is arranged in front of the first air component 61; one end of the air guide component 31 is arranged between the internal circulation air outlet 21 and the internal circulation return air outlet 22, and the other end extends to the front side of the first air component 61.

[0040] In the front-to-back direction of the cabinet 1, the first energy component 61 is directly opposite to the internal circulation air outlet 21 and the internal circulation air return outlet 22, and the cold air flowing out of the internal circulation air outlet 21 can directly flow to the first energy component 61 to dissipate heat. Preferably, the upper end of the first energy component 61 is slightly higher than the internal circulation air return outlet 22, and the lower end is roughly aligned with the internal circulation air outlet 21.

[0041] The wind guide component 31 is arranged between the internal circulation air outlet 21 and the internal circulation air return port 22, and the wind shield component 32 is arranged in front of the first energy component 61. The two cooperate to enable the airflow to complete the forward-upward-backward flow process.

[0042] Specifically, the cold air from the inner circulation air outlet 21 first flows forward through the first energy component 61, takes away the heat of the first energy component 61, and dissipates the heat. After hitting the wind shield component 32, the hot air flows upward and is affected by the heat exchanger 2, and then flows backward through the first energy component 61, takes away the heat of the first energy component 61 again, and dissipates the heat, and finally enters the inner circulation return air outlet 22, enters the core body for heat exchange, and completes a cycle.

[0043] The wind guide assembly 31 is used to form a barrier between the internal circulation return air port 22 and the internal circulation air outlet 21, so that the cold air can circulate instead of directly flowing back upward, so as to increase the air flow path and improve the heat dissipation efficiency. The wind shield assembly 32 is used to change the direction of the air flow so that the air flow returns and flows backward. Since the first energy component 61 has a large heat generation, the wind shield assembly 32 cooperates with the wind guide assembly 31 to ensure that the first airflow circulates only through the first energy component 61, thereby improving the heat dissipation efficiency of the first energy component 61.

[0044] In some embodiments, the first energy member 61 and the air guide assembly 31 may be configured as follows: Figure 1 and Figure 6 The structure shown, see Figure 1 and Figure 6 The first energy components 61 are distributed in multiple phases at intervals along the left and right directions of the cabinet 1, and each phase of the first energy components 61 is closely connected to a radiator; a plurality of groups of first air ducts 12 corresponding to the radiators are also provided in the closed cavity 11, and the radiators are located in the corresponding first air ducts 12; a flow channel is formed between each two adjacent groups of first air ducts 12; and a heat dissipation space exists between the plurality of first air ducts 12 and the rear side panel of the cabinet 1.

[0045] 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; and the plurality of air guide plates 312 are horizontally arranged one by one in a plurality of flow channels.

[0046] The first energy component 61 is the main power device for realizing the function of the electrical cabinet. It is provided with multiple phases to increase the output power of the electrical cabinet. In order to adapt to the circulation of the first airflow, the multi-phase first energy components 61 are distributed at intervals along the left and right directions of the cabinet 1, and the main heat-generating outer surface of each phase first energy component 61 is parallel to the front and rear directions of the cabinet 1.

[0047] Since the multi-phase first energy components 61 are distributed at intervals, a flow channel can be formed between every two adjacent first air ducts 12. In addition, there is a ventilation gap between the first energy component 61 located on the far left and the left side plate of the cabinet 1. Each flow channel is connected to the internal circulation air outlet 21 and the internal circulation return air outlet 22 respectively. Part of the cold air output from the internal circulation air outlet 21 blows on the heat-generating outer surface of each phase first energy component 61 through each flow channel and the ventilation gap to take away the heat and ensure uniform heat dissipation of each phase first energy component 61.

[0048] Since the first component 61 is a main power device, it generates a large amount of heat. In order to further improve its heat dissipation efficiency, the first component 61 is equipped with a separate heat sink. The heat sink is fitted to the first component 61 and can take away the heat generated by the first component 61.

[0049] Specifically, the radiator includes a plurality of heat dissipation fins arranged at intervals. The radiator is generally a low protection level device and does not need to be arranged in the closed cavity 11. Moreover, the radiator needs to continuously flow cold air to absorb heat. Therefore, the radiator is arranged in the first air duct 12. The first air duct 12 is also located in the closed cavity 11, but is connected to the outside world (the air inlet and the air outlet of the first air duct 12 are respectively arranged on the side panels of the cabinet 1). The outside cold air enters the first air duct 12 and blows directly to the radiator to take away the heat of the first vital energy component 61.

[0050] Preferably, the air inlet of the first air duct 12 is opened on the rear side plate of the cabinet 1, and the air outlet is opened on the top plate and / or the front side plate of the cabinet 1. Moreover, the air inlet of the first air duct 12 is located below the heat exchanger 2.

[0051] The air guide 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 air return port 22. The airflow is cut off upward and can only flow forward after flowing out of the internal circulation air outlet 21. The air guide plate 312 is horizontally arranged in the flow passage to block the flow passage up and down so that the airflow can flow forward-upward-backward, increase the airflow flow path, and improve the heat dissipation efficiency of the first energy component 61.

[0052] Preferably, the air guide plate 312 is arranged at the center of the first energy member 61 in the vertical direction, and the horizontal direction of the air guide plate 312 and the partition plate 311 is substantially parallel to the air outlet direction of the internal circulation air outlet 21. If the air outlet direction is inclined downward, the air guide plate 312 and the partition plate 311 are arranged to be inclined downward from back to front.

[0053] In some embodiments, the airflow guide and the electrical component group may also be used as follows: Figure 4 The structure shown, see Figure 4 The lower end of the first air duct 12 extends to below the first gas component 61 and the wind shield component 32; the internal circulation air outlet 21 is arranged to be inclined downward and toward each flow channel.

[0054] The multiple groups of 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 shield assembly 32; the air inlet end of the guide fan 41 is toward the rear side panel of the cabinet 1 and is inclined downward, and the air outlet end is toward the front side panel of the cabinet 1 and is inclined upward.

[0055] The electrical component group further includes a second component 62 , which is located in front of the wind shield assembly 32 and directly faces the air outlet end of the guide fan 41 .

[0056] Since the first energy component 61 is arranged in the middle and rear position of the upper half of the closed cavity 11, and the wind shield component 32 is arranged in front of the first energy component 61, the circulating flow of the first airflow is blocked by the wind shield component 32 and does not flow forward. In order to avoid space in front of the first energy component 61, the second energy component 62 is arranged in front of the first energy component 61 to make full use of the space of the closed cavity 11.

[0057] Since the second component 62 is located in front of the wind shield assembly 32, and the wind shield assembly 32 blocks the circulation of the first airflow, the circulation of the first airflow will not pass through the second component 62. On the basis of only the circulation of the first-level airflow, the second component 62 cannot dissipate heat. Therefore, in order to adapt to the position of the second component 62 and solve its heat dissipation problem, a guide fan 41 is set in front of each flow channel and below the wind shield assembly 32, and the guide fan 41 is used to make the airflow form a second airflow circulation to dissipate heat for the second component 62.

[0058] Preferably, the lower end of the second gas component 62 is slightly lower than the lower end of the first gas component 61, but higher than the first air duct 12; the upper end of the second gas component 62 is slightly lower than the upper end of the first gas component 61. The outlet end of the guide fan 41 faces the lower end surface of the second gas component 62.

[0059] Specifically, the internal circulation air outlet 21 is inclined downward, the cold air is outputted inclined downward, and part of the cold air will be concentrated in the lower part of each flow channel (i.e., the part extending to the bottom of the first energy component 61) and pass through. The guide fan 41 is also inclined to absorb the cold air passing through the lower part of each flow channel and blow it directly upward to the second energy component 62 to dissipate the heat of the second energy component 62.

[0060] In addition, under the action of the heat exchanger 2, the second airflow circulates and flows backward through the upper part of each flow channel (i.e., the part above the wind shield component 32). That is to say, the airflow passing through the second energy component 62 will also pass through the first energy component 61, further dissipating the heat of the first energy component 61.

[0061] It should be noted that the heat generated by the second energy component 62 is less than the heat generated by the first energy component 61 , and the first energy component 61 is a high heat generation module.

[0062] The second component 62 is arranged right in front of the first component 61, so that the space of the closed cavity 11 can be fully utilized and it is convenient to realize electrical connection with the first component 61 and other power devices or electrical components; moreover, the second component 62 uses the guide fan 41 to dissipate heat, which can solve the problem that the second component 62 cannot dissipate heat when it is facing away from the first airflow circulation; the guide fan 41 is arranged at an angle, and the air inlet and the air outlet are not facing the first component 61, which can avoid the interference of the second airflow circulation with the first airflow circulation.

[0063] In some embodiments, the windshield assembly 32 may be configured as follows: Figure 2 and Figure 3 The structure shown, see Figure 2 and Figure 3 The windshield assembly 32 is a mounting substrate for the second component 62; the lower end of the second component 62 is lower than the lower end of the first component 61; 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 substrate extends upward relative to the upper end of the second component 62 and is aligned with the upper end of the first component 61, and the lower end of the mounting substrate is aligned with the lower end of the second component 62; the upwardly extending portion of the mounting substrate has an air hole 321 connected to each flow channel.

[0064] The windshield assembly 32 is an installation substrate, which can be combined with the second component 62 to provide a support basis for installing the second component 62 and reduce the space occupied by the windshield assembly 32, so as to facilitate the electrical connection between the second component 62 and the first component 61 or other electrical components, so that the layout of the electrical component group is reasonable.

[0065] In addition, the mounting substrate is fitted with the second component 62, and the lower end of the mounting substrate is aligned with the lower end of the second component 62, that is, the lower end of the mounting substrate also extends downward relative to the lower end of the first component 61, and the mounting substrate corresponds to the lower extending portion of each flow channel front to back, then part of the cold air passing through the lower portion of each flow channel (i.e., the portion extending from the first component 61) will directly hit the lower portion of the mounting substrate, and the lower portion of the mounting substrate can also absorb part of the cold air, then the mounting substrate can serve as a heat sink for the second component 62, to exchange heat with the second component 62, so as to increase the heat dissipation mode of the second component 62, thereby improving the heat dissipation efficiency of the second component 62.

[0066] The upper end of the mounting substrate extends upward relative to the upper end of the second energy component 62, and the extending portion has an air hole 321 connected to each flow channel. Then, the airflow of the second air circulation will also be concentrated into the upper part of each flow channel (that is, the part above the wind shield component 32), blow through the first energy component 61, and further dissipate the heat of the first energy component 61.

[0067] In some embodiments, the first energy component 61 may be Figure 3 The structure shown, see Figure 3 The first element 61 includes an upper element 611 and a lower element 612. The upper element 611 is located above the air guide plate 312 and corresponds to the air hole 321 in front and back. The upper element 611 generates more heat than the lower element 612.

[0068] For the first energy component 61, the first airflow circulates and blows on its entire heat-generating outer surface, and the second airflow circulates and blows on its upper surface through the air holes 321. Therefore, the air volume received by the upper half of the first energy component 61 is greater than the air volume received by the lower half. In order to rationally utilize the air volume in different spaces, the first energy component 61 is divided into an upper sub-element component 611 and a lower sub-element component 612 in this embodiment, and the upper sub-element component 611 with a large heat generation is made to correspond to the air holes 321 front and back. Then, the upper sub-element component 611 can receive the airflow of the first airflow circulation and the airflow of the second airflow circulation. Although the upper sub-element component 611 has a large heat generation, the air volume it receives is also large, thereby ensuring that the first energy component 61 has uniform heat dissipation as a whole.

[0069] In some embodiments, the airflow guide and the electrical component group may also be used as follows: Figure 5 The structure shown, see Figure 5 , multiple groups of air flow guides include a third air flow guide 5, the third air flow guide 5 is used to guide the air flow to form a third air flow circulation flow; the internal circulation air outlet 21 is arranged obliquely downward; the third air flow guide 5 includes an air supply fan 51 and a first exhaust fan 52; the air supply fan 51 is arranged at the front and lower part of the internal circulation air outlet 21, and the air outlet end faces the lower side plate of the cabinet 1; the first exhaust fan 52 is arranged at the front lower corner point of the closed cavity 11; the air inlet end of the first exhaust fan 52 faces the rear side plate of the cabinet 1.

[0070] The electrical component group includes a third component 63 and a fourth component 64; the third component 63 is located in the rear half of the closed cavity 11 and is opposite to the air outlet of the air supply fan 51; the fourth component 64 is located in the front half of the closed cavity 11 and is aligned with the air inlet of the first exhaust fan 52.

[0071] The air outlet end of the air supply fan 51 faces the lower side panel of the cabinet 1, so the air supply fan 51 is used to supply air to the bottom of the cabinet 1. The first exhaust fan 52 is set at the front bottom of the closed cavity 11, and the air inlet end faces the rear side panel of the cabinet 1, so the first exhaust fan 52 is used to exhaust air to the front of the cabinet 1.

[0072] Specifically, the air supply fan 51 is arranged directly below the multiple first air ducts 12, and the cold air inclined downwardly output by the internal circulation air outlet 21 is gathered in each flow channel. Part of the cold air flows downward in the rear half of the closed cavity 11 under the action of the air supply fan 51, and is drawn to the front lower half of the closed cavity 11 under the action of the first exhaust fan 52. According to the natural rising law of hot air flow and the action of the heat exchanger 2, the airflow reaching the front lower half of the closed cavity 11 will also flow upward and backward, and finally flow back to the internal circulation return air outlet 22.

[0073] The third airflow circulates through the rear lower half, front lower half, front upper half and the first energy component 61 of the closed cavity 11, and especially can fully flow 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 local hot spot problem.

[0074] In addition, when the third airflow circulates back to the inner circulation return air port 22, it will also pass through the second energy component 62 and the first energy component 61, and can also dissipate heat for the second energy component 62 and the first energy component 61 to improve the heat dissipation efficiency.

[0075] On the path of the third air flow circulation, since the third gas component 63 is located upstream of the fourth gas component 64 , the heat generated by the third gas component 63 is smaller than that of the fourth gas component 64 .

[0076] The third gas component 63 is directly opposite to the air outlet of the air supply fan 51, and the cold air can directly flow to the third gas component 63. Since the heat generation of the third gas component 63 is relatively small, the temperature rise range of the cold air after passing through is small; the fourth gas component 64 is directly opposite to the air inlet of the first exhaust fan 52, and the fourth gas component 64 can also receive the cold air with relatively low temperature.

[0077] In addition, since the first exhaust fan 52 is located in front of the guide fan 41, the exhaust of the first exhaust fan 52 can form a negative pressure in the lower half of the closed cavity 11, which can absorb part of the cold air on the circulating flow of the second airflow, increase the amount of cold air passing through the fourth gas component 64, and improve the heat dissipation efficiency.

[0078] It should be noted that the air supply fan 51 is a speed-adjustable fan, and the air volume can be adjusted according to the temperature at the second air component 62 and the temperature at the third air component 63 and the fourth air component 64. Specifically, a temperature sensor is provided at each of the second air component 62, the third air component 63 and the fourth air component 64, for real-time monitoring of the temperature at each air component, and transmitting the monitoring data to the control system of the electrical cabinet; the control system controls the air speed of the air supply fan 51 according to the temperature monitoring value.

[0079] If the monitored temperature value at the second air component 62 is higher than the preset value there, the control system controls the exhaust speed of the air supply fan 51 to decrease, and accordingly, the air flow rate of the second air circulation will increase to increase the air volume passing through the second air component 62; if the monitored temperature at the third air component 63 and / or the fourth air component 64 is higher than the preset value there, the control system controls the exhaust speed of the air supply fan 51 to increase, and accordingly, the air flow rate of the third air circulation will increase to increase the air volume passing through the third air component 63 and the fourth air component 64.

[0080] In some embodiments, the cabinet 1 can also be used as follows Figure 1 The structure shown, see Figure 1 A sealing plate 13 is provided on the inner side of the front side plate of the cabinet 1, and the sealing plate 13 and the front side plate of the cabinet 1 form a vertical channel 14; the air inlet end of the vertical channel 14 is connected to the air outlet end of the first exhaust 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.

[0081] The sealing plate 13 is located behind the front side plate of the cabinet 1. A vertical channel 14 can be formed by means of the sealing plate 13 and the front side plate of the cabinet 1. 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.

[0082] Due to the exhaustion of the first exhaust fan 52, a negative pressure is formed in the lower space of the cabinet 1, so that the airflow in the lower half flows forward. The first exhaust fan 52 can also send part of the heated airflow into the vertical channel 14. Since the front side panel of the cabinet 1 directly faces the outside, the airflow can transfer heat to the outside through the front side panel when passing through the vertical channel 14, so as to reduce the temperature of the airflow return.

[0083] After cooling down through the vertical channel 14, the airflow flows back to the inner circulation return air port 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 position of the air outlet of the vertical channel 14.

[0084] Specifically, the position of the air outlet end of the vertical channel 14 is determined according to the heat generation of the second energy component 62. If the heat generation of the second energy component 62 is small, and the airflow of the second air circulation is sufficient to dissipate the heat of the second energy component 62, then the position of the air outlet of the vertical channel 14 can be increased, and the air outlet is directly facing the first energy component 61, and the return air path of the third air circulation does not pass through the second energy component 62; if the heat generation of the second energy component 62 is large, and the heat dissipation effect of the second air circulation on the second energy component 62 cannot reach the preset target, then the position of the air outlet of the vertical channel 14 can be lowered, and the air outlet is facing the second energy component 62; if the heat generation of the second energy component 62 is between the above two situations, then the air outlet of the vertical channel 14 can be directed toward the upper half of the second energy component 62.

[0085] During the process, the heat source passes through the upper part of the second energy component 62 and the upper part of the first energy component 61 , and can also dissipate heat for the second energy component 62 and the first energy component 61 .

[0086] Correspondingly, for the first energy component 61, the first air circulation flows and blows on its entire heat-generating outer surface, and the second air circulation flows and the third air circulation flows blow on its heat-generating upper surface. The three-level air circulation flows can all dissipate heat for the first energy component 61, thereby improving its heat dissipation effect.

[0087] For the second energy component 62, the first air circulation flow hits the wind shield component 32, and the wind shield component 32 can serve as a heat exchange matrix for the second energy component 62. The second air circulation flow and the third air circulation flow pass through the second energy component 62. The three-level air circulation flow can dissipate heat for the second energy component 62, thereby improving its heat dissipation effect.

[0088] Since the airflow exchanges heat after passing through the vertical channel 14 , the heat generated by the second component 62 can be smaller than that of the fourth component 64 . Therefore, the second component 62 is not restricted by the fourth component 64 , and the device corresponding to the second component 62 can be reasonably selected based on the electrical connection relationship with the first component 61 .

[0089] In some embodiments, the third airflow guide 5 may also be configured as follows: Figure 5 The structure shown, see Figure 5 The third air flow guide 5 also includes a second exhaust fan 53, which is arranged in the front half of the closed cavity 11 and above the first exhaust fan 52; the air inlet end of the second exhaust fan 53 is aligned with the air outlet end of the vertical channel 14, and the air outlet end of the second exhaust fan 53 faces the inner circulation return air outlet 22.

[0090] The second exhaust fan 53 is located directly in front of the second energy component 62 and is inclined relative to the second energy component 62, so as to supply air to the second energy component 62 and the first energy component 61; the second exhaust fan 53 can accelerate the air flow velocity in the vertical channel 14 and the closed cavity 11, thereby improving the heat dissipation efficiency of the third sequential flow.

[0091] In some embodiments, the electrical component group can also be used as follows Figure 1 The structure shown, see Figure 1 A second air duct 15 is also provided in the closed cavity 11 . The second air duct 15 is located in the lower half of the closed cavity 11 , and the second air duct 15 is connected to the outside. The electrical component group also includes a low-protection component arranged in the second air duct 15 .

[0092] Low-protection components are generally modules with large volume and heavy weight. They usually generate a lot of heat, but the protection requirements are not high. There is no need 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 a second air duct 15 is provided on the outside to reasonably utilize the load-bearing structure of the entire cabinet 1 and increase the stability of the low-protection components inside the cabinet 1.

[0093] The above description is only 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 in the protection scope of the present invention.

Claims

1. An electrical cabinet, characterized in that: include: The cabinet (1) has a closed cavity (11); an electrical component group is arranged in the closed cavity (11); A heat exchanger (2) is arranged on a side plate of the cabinet (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; and A plurality of groups of airflow guides are respectively arranged in the closed cavity (11); Wherein, the cold air output from the inner circulation air outlet (21) forms a multi-stage air circulation flow that does not interfere with each other under the action of each group of the air flow guides, and the air circulation flows of each stage converge at the inner circulation air return port (22) and enter the heat exchanger (2) for heat exchange; The paths of the airflow circulation at each stage are based on the heat exchanger (2) and are radially expanded toward the periphery of the heat exchanger (2); the electrical component groups are distributed on the paths of the airflow circulation at each stage.

2. The electrical cabinet according to claim 1, characterized in that: The heat exchanger (2) is arranged on the upper half of the rear side plate of the cabinet (1); the internal circulation air outlet (21) and the internal circulation air return outlet (22) are both facing the front side plate 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) further comprises 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).

3. The electrical cabinet according to claim 2, characterized in that: The plurality of groups of airflow guides include a first airflow guide (3), wherein the first airflow guide (3) is used to guide the airflow to form a first airflow circulation flow; The electrical component group comprises a first component (61), wherein the first component (61) is arranged in the upper half of the closed cavity (11) and is located in front of the heat exchanger (2); The first airflow guide (3) comprises an air guide component (31) and a wind shield component (32), wherein the wind shield component (32) is arranged in front of the first energy component (61); one end of the air guide component (31) is arranged 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 energy component (61).

4. The electrical cabinet according to claim 3, characterized in that: The first energy components (61) are distributed in multiple phases at intervals along the left-right direction of the cabinet (1), and each phase of the first energy components (61) is closely connected to a radiator; The closed cavity (11) is further provided with a plurality of groups of first air ducts (12) corresponding one to one with the radiator, and the radiator is located in the corresponding first air duct (12); a flow passage is formed between each two adjacent groups of the first air ducts (12); and a heat dissipation space exists between the plurality of groups of the first air ducts (12) and the rear side plate of the cabinet (1); The air guide assembly (31) comprises a partition plate (311) arranged horizontally 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); and the plurality of air guide plates (312) are arranged horizontally in the plurality of flow passages in a one-to-one correspondence.

5. The electrical cabinet according to claim 4, characterized in that: The lower end of the first air duct (12) extends to below the first gas component (61) and the wind shielding component (32); The inner circulation air outlet (21) is arranged obliquely downward and faces each of the flow passages; The plurality of groups of airflow guides further include a second airflow guide (4), wherein the second airflow guide (4) is used to guide the airflow to form a second airflow circulation flow; The second airflow guide (4) comprises a guide fan (41); the guide fan (41) is arranged in front of each of the flow passages and below the wind shielding assembly (32); the air inlet end of the guide fan (41) faces the rear side plate of the cabinet (1) and is inclined downward, and the air outlet end faces the front side plate of the cabinet (1) and is inclined upward; The electrical component group further comprises a second gas component (62), wherein the second gas component (62) is located in front of the wind shield assembly (32) and directly faces the air outlet end of the guide fan (41).

6. The electrical cabinet according to claim 5, characterized in that: The windshield assembly (32) is a mounting base plate for the second element (62); The lower end of the second energy component (62) is lower than the lower end of the first energy component (61); the upper end of the first energy component (61) is higher than the upper end of the second energy component (62); The upper end of the mounting substrate extends upward relative to the upper end of the second gas component (62) and is aligned with the upper end of the first gas component (61), and the lower end of the mounting substrate is aligned with the lower end of the second gas component (62); the upwardly extending portion of the mounting substrate has air holes (321) connected to each of the flow channels.

7. The electrical cabinet according to claim 6, characterized in that: The first energy component (61) comprises an upper sub-energy component (611) and a lower sub-energy component (612); the upper sub-energy component (611) is located above the air guide plate (312) and corresponds to the air hole (321) in front and back; the heat generated by the upper sub-energy component (611) is greater than the heat generated by the lower sub-energy component (612).

8. The electrical cabinet according to claim 2, characterized in that: The internal circulation air outlet (21) is arranged to be inclined downward; The plurality of groups of airflow guides include a third airflow guide (5), wherein the third airflow guide (5) is used to guide the airflow to form a third airflow circulation flow; The third air flow guide (5) comprises an air supply fan (51) and a first air exhaust fan (52); the air supply fan (51) is arranged at the front lower part of the internal circulation air outlet (21), and the air outlet end faces the lower side plate of the cabinet (1); the first air exhaust fan (52) is arranged at the front lower corner point of the closed cavity (11); the air inlet end of the first air exhaust fan (52) faces the rear side plate of the cabinet (1); The electrical component group comprises a third gas component (63) and a fourth gas component (64); the third gas component (63) is located in the rear half of the closed cavity (11) and is directly opposite to the air outlet end of the air supply fan (51); and the fourth gas component (64) is located in the front half of the closed cavity (11) and is aligned with the air inlet end of the first exhaust fan (52).

9. The electrical cabinet according to claim 8, characterized in that: A sealing plate (13) is provided on the inner side of the front side plate of the cabinet body (1), and the sealing plate (13) and the front side plate of the cabinet body (1) form a vertical channel (14); The air inlet end of the vertical channel (14) is in communication with the air outlet end of the first exhaust 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 according to claim 9, characterized in that The third air flow guide (5) further comprises a second exhaust fan (53), the second exhaust fan (53) being arranged in the front half of the closed cavity (11) and being located above the first exhaust fan (52); the air inlet end of the second exhaust fan (53) is aligned with the air outlet end of the vertical channel (14), and the air outlet end faces the internal circulation return air outlet (22).

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