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 mounting substrate, a first component and a flow guide fan. 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 mounting substrate is arranged in the closed cavity and right corresponds to the heat exchanger in the first direction; the first element is positioned on the leeward side of the mounting substrate; the air inlet end of the flow guide fan faces the inner circulation air outlet, and the air outlet end is aligned with the first element. According to the electrical cabinet provided by the invention, although the first component is arranged on the leeward side of the mounting substrate and is far away from the heat exchanger, part of cold air can be guided by the diversion fan to directly lead to the first component to dissipate heat so as to take away heat of the first component, so that the problem that the first component deviating from the heat exchanger cannot dissipate heat is solved, and the problem of local hot spots is avoided; and the overall heat dissipation effect of the electrical cabinet is improved.

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] Electrical cabinets such as photovoltaic inverters and energy storage converters usually include electrical components such as inverter modules, reactor modules, and capacitor busbar modules. Since such electrical cabinets are usually used in harsh environments such as high temperature, high humidity, and high dust, in order to protect the electrical components inside, the electrical cabinets are required to have high sealing performance and high protection levels, so only closed heat dissipation can be used for the electrical cabinets.

[0003] In the prior art, in order to dissipate heat from electrical components inside a closed cabinet, an air-to-air heat exchanger is installed on the door panel of the electrical cabinet. The air-to-air heat exchanger is used to conduct heat and circulate the air flow inside the cabinet to remove the heat from the cabinet.

[0004] Since a variety of components are usually arranged inside an electrical cabinet, in order to meet the requirements of electrical connection and optimized layout between related components, some components are arranged away from the air outlet of the heat exchanger, which makes it impossible for the component to dissipate heat and creates a hot spot problem, resulting in poor overall heat dissipation effect of the electrical cabinet. Summary of the invention

[0005] The object of the present invention is to provide an electrical cabinet, aiming to solve the technical problems in the prior art that components away from the heat exchanger cannot dissipate heat and the electrical cabinet has hot spots.

[0006] To achieve the above object, the technical solution adopted by the present invention is: to provide an electrical cabinet, comprising: A cabinet having a closed cavity; the cabinet is defined to have a first direction, a second direction and a third direction, wherein the first direction, the second direction and the third direction are orthogonal to each other; 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; the inner circulation air outlet and the inner circulation air return outlet are arranged at intervals along the third direction; A mounting substrate is disposed in the closed cavity and corresponds to the heat exchanger in the first direction; A first element is disposed in the closed cavity and located on the leeward side of the mounting substrate; and A guide fan is arranged in the closed cavity, with its air inlet facing the internal circulation air outlet and its air outlet facing the first gas component; Part of the cold air output from the inner circulation air outlet is directed to the first energy component through the guide fan, and the airflow passing through the first energy component enters the heat exchanger from the inner circulation return air outlet for heat exchange.

[0007] In a possible implementation, a flow channel is provided in the closed cavity, the flow channel is located between the heat exchanger and the mounting substrate, and the flow channel extends along the first direction; the internal circulation air outlet faces the air inlet end of the flow channel, and the air inlet end of the guide fan faces the air outlet end of the flow channel.

[0008] In some embodiments, in the third direction, the flow channel has a first end and a second end, the first end extends outward relative to the first gas component; the internal circulation air outlet is inclined toward the air inlet end of the first end; and the guide fan is located at the air outlet end of the first end.

[0009] In some embodiments, the end surface of the first end portion is blocked by a baffle.

[0010] In a possible implementation, in the third direction, one end of the mounting substrate close to the inner circulation return air outlet extends outward relative to the first element, and an air hole is provided at the extended portion; the air hole faces the inner circulation return air outlet; In the third direction, the flow passage has a first end and a second end, the second end does not protrude from the extended end of the mounting substrate; and the air hole is connected to the second end.

[0011] In some embodiments, the electrical cabinet further comprises: The second element corresponds to the second end in the second direction; the air hole faces the second element.

[0012] In some embodiments, an airflow guide is provided in the closed cavity around the second energy component, and the airflow guide is used to guide part of the cold air output from the internal circulation air outlet to flow around the second energy component.

[0013] In some embodiments, the second sub-element includes an upper sub-element and a lower sub-element spaced apart along the third direction; the air holes face the upper sub-element; and the heat generated by the upper sub-element is greater than that of the lower sub-element.

[0014] In some embodiments, the second component is distributed in multiple phases at intervals along the second direction, and each phase of the second component is closely connected to a heat sink; A plurality of groups of heat dissipation air ducts corresponding to the radiators are also provided in the closed cavity, and the radiators are located in the corresponding heat dissipation air ducts; and the flow passage is formed between every two adjacent groups of heat dissipation air ducts.

[0015] In a possible implementation, the third direction is the height direction of the cabinet, and the internal circulation air outlet is located below the internal circulation air return outlet; and the first direction is the length direction of the cabinet.

[0016] The beneficial effects of the electrical cabinet provided by the present invention are as follows: compared with the prior art, the electrical cabinet of the present invention, the closed cavity can meet the use requirements of the cabinet with high sealing performance and high protection level; the heat exchanger is used to absorb hot air in the closed cavity and output cold air into the closed cavity; although the first gas component is arranged on the leeward side of the mounting substrate, away from the heat exchanger, the air inlet end of the guide fan faces the inner circulation air outlet, and the air outlet end is aimed at the first gas component. Under the guidance of the guide fan, part of the cold air can directly flow to the first gas component for heat dissipation to take away the heat of the first gas component, thereby solving the problem that the first gas component away from the heat exchanger cannot dissipate heat, avoiding local hot spots, and improving the overall heat dissipation effect of the electrical cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic diagram of the structure of an electrical cabinet provided in an embodiment of the present invention Figure 1 (The left side panel of the cabinet is not shown in the figure); Figure 2 A schematic diagram of the structure of an electrical cabinet provided in an embodiment of the present invention Figure 2 (The left side panel of the cabinet is not shown in the figure); Figure 3 A schematic diagram of the structure of an electrical cabinet provided in an embodiment of the present invention Figure 3 (The left side panel of the cabinet is not shown in the figure); Figure 4 A schematic diagram of the structure of an electrical cabinet provided in an embodiment of the present invention Figure 4 (The left side panel of the cabinet is not shown in the figure); Figure 5 A schematic structural diagram of a second component of an electrical cabinet provided in an embodiment of the present invention.

[0019] In the figure: 1. Cabinet; 11. Enclosed cavity; 12. Cooling duct; 13. Flow passage; 14. Baffle; 2. Heat exchanger; 21. Internal circulation air outlet; 22. Internal circulation air return outlet; 23. External circulation air inlet; 24. External circulation air outlet; 25. Air outlet fan; 3. Install the base plate; 31. Air holes; 4. The first vitality piece; 5. Guide fan; 6. Second vitality piece; 61. Upper vitality piece; 62. Lower vitality piece; 7. Air flow guide; 71. Partition plate; 72. Air guide plate. DETAILED DESCRIPTION

[0020] 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.

[0021] To solve the above problems, please also refer to Figures 1 to 4 , the electrical cabinet provided by the present invention is now described. The electrical cabinet includes a cabinet body 1, a heat exchanger 2, a mounting substrate 3, a first component 4 and a guide fan. The cabinet body 1 has a closed cavity 11; the cabinet body 1 is limited to have a first direction, a second direction and a third direction, and the first direction, the second direction and the third direction are orthogonal to each other; the heat exchanger 2 is arranged on the side panel 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; the internal circulation air outlet 21 and the internal circulation air return outlet 22 are arranged at intervals along the third direction; the mounting substrate 3 is arranged in the closed cavity 11, and corresponds to the heat exchanger 2 in the first direction; the first component 4 is arranged in the closed cavity 11, and is located on the leeward side of the mounting substrate 3; the guide fan 5 is arranged in the closed cavity 11, with the air inlet end facing the internal circulation air outlet 21, and the air outlet end aligned with the first component 4; Part of the cold air output from the inner circulation air outlet 21 is directed to the first energy component 4 through the guide fan 5 , and the airflow passing through the first energy component 4 enters the heat exchanger 2 from the inner circulation return air outlet 22 for heat exchange.

[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, an upper side panel, a lower side 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 sealing 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 power device group.

[0023] It should be noted that Figures 1 to 4 Arrow A indicates a first direction, arrow B indicates a second direction, and arrow C indicates a third direction.

[0024] 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.

[0025] The heat exchanger 2 is preferably an air-to-air heat exchanger 2, which has 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 the two will not offset each other.

[0026] Specifically, the heat exchanger 2 has only one internal circulation air outlet 21 and one internal circulation air return outlet 22, and both the internal circulation air outlet 21 and the internal circulation air return outlet 22 face the first direction, or are slightly inclined relative to the first direction. The airflow passing through the first element 4 enters the heat exchanger 2 from the internal circulation air return outlet 22, and after heat exchange and cooling in the core, enters the closed cavity 11 from the internal circulation air outlet 21. The heat exchanger 2 also has an external circulation air inlet 23 and an external circulation air outlet 24 facing the outside world respectively. The external airflow enters the heat exchanger 2 from the external 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 external circulation air outlet 24.

[0027] The mounting substrate 3 is used to assemble the first component 4. The mounting positions of the mounting substrate 3 and the first component 4 are determined according to the positions of other components inside the electrical cabinet. In order to meet the electrical connection requirements with other components, optimize the cable layout, and reasonably utilize the space of the closed cavity 11, in the first direction, the mounting substrate 3 is arranged on one side of the heat exchanger 2, and the first component 4 is arranged on the leeward side of the mounting substrate 3. The side of the first component 4 facing away from the mounting substrate 3 is electrically connected to other components through a copper bus or a wiring harness.

[0028] Since the first energy component 4 is arranged on the leeward side of the mounting substrate 3, the cold air outputted from the inner circulation air outlet 21 will be blocked by the mounting substrate 3 and cannot directly pass through the first energy component 4, resulting in the problem that the first energy component 4 cannot dissipate heat. In order to solve the above layout problem, a guide fan 5 is arranged in the closed cavity 11, with the air inlet end of the guide fan 5 facing the inner circulation air outlet 21 and the air outlet end facing the first energy component 4.

[0029] The guide fan 5 is used to guide part of the cold air output from the inner circulation air outlet 21. Since the air outlet of the guide fan 5 is toward the first energy element 4, the guide fan 5 can directly direct part of the cold air to the first energy element 4 to take away the heat generated by it. In addition, due to the structural limitations of the heat exchanger 2 itself, the airflow passing through the first energy element 4 can flow back to the inner circulation return air outlet 22 and finally enter the heat exchanger 2 for heat exchange.

[0030] Compared with the prior art, the electrical cabinet provided by the present invention has a closed cavity 11 that can meet the use requirements of high sealing performance and high protection level of the cabinet; the heat exchanger 2 is used to absorb hot air in the closed cavity 11 and output cold air to the closed cavity 11; although the first energy component 4 is arranged on the leeward side of the mounting substrate 3, away from the heat exchanger 2, the air inlet end of the guide fan 5 faces the inner circulation air outlet 21, and the air outlet end is aimed at the first energy component 4. Under the guidance of the guide fan 5, part of the cold air can directly flow to the first energy component 4 for heat dissipation to take away the heat of the first energy component 4, thereby solving the problem that the first energy component 4 away from the heat exchanger 2 cannot dissipate heat, avoiding local hot spots, and improving the overall heat dissipation effect of the electrical cabinet.

[0031] There is a space between the mounting base plate 3 and the heat exchanger 2 so that the cold air outputted from the inner circulation air outlet 21 can flow into the closed cavity 11. Since the guide fan 5 needs to guide part of the cold air to the first energy component 4, in order to accumulate the cold air and avoid the loss of cold, in some embodiments, the electrical cabinet can also be used as follows Figure 3 The structure shown, see Figure 3 A flow channel 13 is provided in the closed cavity 11, the flow channel 13 is located between the heat exchanger 2 and the mounting substrate 3, and the flow channel 13 extends along the first direction; the internal circulation air outlet 21 faces the air inlet end of the flow channel 13, and the air inlet end of the guide fan 5 faces the air outlet end of the flow channel 13.

[0032] The flow channel 13 extends along the first direction, and its air inlet end is completely aligned with the internal circulation air outlet 21. Most of the cold air output from the internal circulation air outlet 21 can be accumulated in the flow channel, thereby avoiding the airflow from being dispersed and diffused into the closed cavity 11 after being output from the internal circulation air outlet 21, causing cold loss.

[0033] The air inlet end of the guide fan 5 faces the air outlet end of the flow passage 13 , that is, the air inlet end of the guide fan 5 faces the inner circulation air outlet 21 through the flow passage 13 .

[0034] Preferably, in order to increase the air collection volume and air passing speed of the flow passage 13, at least two flow passages 13 may be distributed at intervals along the second direction.

[0035] It should be noted that the flow channel 13 is a spatial structure, which can be formed by enclosing multiple partitions arranged in the closed cavity 11, or by means of a ventilation duct or a heat dissipation duct 12 in the closed cavity 11. This embodiment does not limit the specific structure of the flow channel 13, as long as the flow channel 13 extends along the first direction and can accumulate cold air.

[0036] In some embodiments, in the third direction, the flow channel 13 has a first end and a second end, the first end extends outward relative to the first component 4; the internal circulation air outlet 21 is inclined toward the air inlet end of the first end; and the guide fan 5 is located at the air outlet end of the first end.

[0037] The inner circulation air outlet 21 is inclined toward the first end, and the cold air is outputted at an inclination relative to the first direction, so that part of the cold air will be concentrated to pass through the first end, and the air inlet end of the guide fan 5 is toward the air outlet end of the first end (that is, the air inlet end of the guide fan 5 is toward the inner circulation air outlet 21 through the first end), and the guide fan 5 just absorbs the cold air at the first end and blows it directly toward the first energy component 4 to dissipate heat for the first energy component 4.

[0038] It should be noted that the above-mentioned first end portion extends outward relative to the first energy component 4, which only refers to extending and protruding in the third direction. For example, the flow channel 13 is arranged along the up and down direction of the cabinet 1, that is, the third direction is the up and down direction of the cabinet 1, then the lower end of the flow channel 13 extends downward relative to the first energy component 4.

[0039] In addition, in addition to providing a support base for the first energy component 4, the mounting substrate 3 is also arranged in close contact with the first energy component 4. The lower end of the mounting substrate 3 is aligned with the lower end of the first energy component 4, and the mounting substrate 3 corresponds to the first end in the first direction, so part of the cold wind passing through the first end will directly hit the mounting substrate 3, and the mounting substrate 3 can also absorb part of the cold wind, so the mounting substrate 3 can be used as a heat sink for the first energy component 4, and heat is exchanged with the first energy component 4 to increase the heat dissipation mode of the first energy component 4, thereby improving the heat dissipation efficiency of the first energy component 4.

[0040] In some embodiments, the above-mentioned flow passage 13 can also be used as follows Figure 3 The structure shown, see Figure 3 In the third direction, the end surface of the first end is blocked by a baffle plate 14.

[0041] Specifically, the end of the first end facing the heat exchanger 2 is the air inlet end, and the end facing away from the heat exchanger 2 is the air outlet end. When the airflow flows through the first end, it preferably flows along the air inlet end of the first end to the air outlet end.

[0042] By blocking the baffle plate 14 at the end face of the first end, the flow channel 13 is blocked in the third direction, so that the cold air can only flow to the air outlet end of the flow channel 13, thereby preventing the cold air from flowing away from other parts of the first end and causing cooling loss.

[0043] In some embodiments, the mounting substrate 3 may also be Figure 4 The structure shown, see Figure 4 One end of the mounting substrate 3 close to the inner circulation return air outlet 22 extends outward relative to the first energy component 4, and an air hole 31 is provided at the extending portion; the air hole 31 faces the inner circulation return air outlet 22; in the third direction, the flow channel 13 has a first end and a second end, and the second end does not protrude from the extending end of the mounting substrate 3; the air hole 31 is connected to the second end.

[0044] It should be noted that the one end of the above-mentioned mounting substrate 3 extending outward relative to the first component 4 only refers to extending and protruding in the third direction. For example, the first component 4 is arranged along the up and down direction of the cabinet 1, then the upper end of the mounting substrate 3 extends upward relative to the first component 4.

[0045] The air hole 31 is provided at the extended part of the mounting base plate 3, so that the airflow passing through the first element 4 can pass through and return to the inner circulation return air port 22 through the second end. With the above arrangement, the airflow path passing through the first element 4 can be optimized, and the airflow can be ensured to form a circulation flow based on the heat exchanger 2. In addition, the airflow accumulates in the second end during the reflux process, which can also prevent the hot airflow from diffusing into the closed cavity 11 and affecting the heat dissipation of other components.

[0046] In some embodiments, the electrical cabinet may also be used as follows Figures 1 to 4 The structure shown, see Figures 1 to 4 The electrical cabinet further includes a second component 6, which corresponds to the second end in the second direction; the air hole 31 faces the second component 6. In the second direction, both ends of the mounting substrate 3 extend to the periphery of the second component 6 respectively.

[0047] The second component 6 and the second end portion are in direct correspondence with each other in the second direction, so it can be understood that the second component 6 is arranged on the windward side of the mounting substrate 3, and the second component 6 and the heat exchanger 2 are in direct correspondence with each other in the first direction. Part of the cold air outputted from the internal circulation air outlet 21 can be directly directed to the second end portion, blown across the surface of the second component 6, so as to dissipate heat from the second component.

[0048] Moreover, there is an installation substrate 3 between the second energy component 6 and the first energy component 4. The airflow passing through the second energy component 6 will be turned back and flow to the internal circulation return air port 22 after hitting the installation substrate 3. On the one hand, the installation substrate 3 can form a partition for the hot air passing through the second energy component 6 to prevent the hot air passing through the second energy component 6 from passing to the first energy component 4; on the other hand, the installation substrate 3 can also reduce the distance between the first energy component 4 and the second energy component 6, making the two more concentrated, that is, the space of the closed cavity 11 can be fully utilized, and it is convenient to implement electrical connection between the second energy component 6 and the first energy component 4, thereby optimizing the cable layout.

[0049] It should be noted that, although the inner circulation air outlet 21 is inclined toward the first end, not all cold air can only flow to the first end. The cold air must be diffused, with part of it flowing toward the first end and part of it flowing toward the second end. The cold air flowing toward the first end is directly blown toward the first element 4 under the action of the guide fan 5 to take away the heat of the first element 4; the cold air flowing toward the second end is directly blown toward the second element 6 to take away the heat of the second element 6. Therefore, the airflow flowing through the second element 6 and the airflow flowing through the first element 4 will not interfere with each other. Moreover, due to the structural limitations of the heat exchanger 2 itself, the airflow passing through the second element 6 can flow back to the inner circulation return air outlet 22, and the airflow passing through the first element 4 can also flow back to the inner circulation return air outlet 22. The two airflows finally enter the heat exchanger 2 for heat exchange.

[0050] Since cold air directly circulates through the second energy component 6 and the first energy component 4, local hot spots can be avoided and the overall heat dissipation effect of the electrical cabinet can be improved.

[0051] By optimizing the positions of the heat dissipation duct 12 and the second energy component 6, the heat dissipation duct 12 and the internal circulation air outlet 21, and the heat dissipation duct 12 and the guide fan 5, on the basis of adapting the heat exchanger 2, the second energy component 6, the mounting substrate 3 and the first energy component 4 to be arranged in a positive correspondence along the first direction, the cold air output from the internal circulation air outlet 21 can be naturally divided into two streams without interfering with each other, thereby meeting the respective heat dissipation requirements of the first energy component 4 and the second energy component 6.

[0052] It should be noted that the heat generated by the second component 6 is greater than that of the first component 4. The air hole 31 faces the second component 6, so the airflow passing through the first component 4 will also enter the second end through the air hole 31, blow through the second component 6, and further dissipate heat for the second component 6.

[0053] Preferably, an airflow guide 7 is provided around the second energy component 6 in the closed cavity 11 , and the airflow guide 7 is used to guide part of the cold air output from the internal circulation air outlet 21 to flow around the second energy component 6 .

[0054] In order to ensure the flow efficiency of the airflow, an airflow guide 7 may be provided on the periphery of the second gas element 6 to guide the airflow to form an independent circulation flow around the second gas element 6 without interfering with the airflow passing through the guide fan 5. The airflow guide 7 may be in the form of a fan combination, or in the form of a baffle combination to isolate the air guide channel, or in the form of a fan combination plus a baffle combination.

[0055] Specifically, the airflow guide 7 can be a plate structure arranged in the flow passage 13, including a partition plate 71 and an air guide plate 72. Figure 5 The partition plate 71 is transversely arranged in the gap between the first end and the heat exchanger 2 to separate the internal circulation air outlet 21 from the internal circulation air return outlet 22 ; the air guide plate 72 is connected to the partition plate 71 and transversely arranged in the flow passage 12 .

[0056] The partition plate 71 and the plurality of air guide plates 72 are integrally formed structures, and the plate surfaces of the partition plate 71 and the air guide plates 72 are perpendicular to the flow direction of the airflow output from the internal circulation air outlet 21. The partition plate 71 is used to block the internal circulation air outlet 21 and the internal circulation return air outlet 22, ensuring that the airflow directly returns to the circuit and can only flow to the second energy component 6 after passing through the internal circulation air outlet 21. The air guide plate 72 is horizontally arranged in the flow passage 12, and is used to block the flow passage 12, so that the airflow can flow in the flow passage to form a cycle, increase the airflow flow path, and improve the heat dissipation efficiency of the second energy component 6.

[0057] In some embodiments, the second element 6 may be Figure 1 and Figure 4 The structure shown, see Figure 1 and Figure 4 The second component 6 includes an upper sub-component 61 and a lower sub-component 62 spaced apart along the third direction; the air hole 31 faces the upper sub-component 61; and the heat generated by the upper sub-component 61 is greater than the heat generated by the lower sub-component 62.

[0058] For the second component 6, the airflow circulating through the flow channel 13 blows on its entire heat-generating outer surface, while the airflow through the air holes 31 blows on part of its surface. Therefore, the part of the second component 6 corresponding to the air holes 31 receives a larger amount of air than other parts. In order to rationally utilize the airflow in different spaces, the second component 6 is divided into an upper sub-component 61 and a lower sub-component 62 in this embodiment, and the upper sub-component 61 with a larger heat generation corresponds to the air holes 31 front and back. Then, the upper sub-component 61 can accept the airflows of the two circulating airflows. Although the upper sub-component 61 has a large heat generation, the air volume it receives is also large, thereby ensuring uniform heat dissipation of the second component 6 as a whole.

[0059] In some embodiments, the second element 6 may also be Figure 3 and Figure 5 The structure shown, see Figure 3 and Figure 5 The second component 6 is distributed in multiple phases at intervals along the second direction, and each phase of the second component 6 is closely connected to a radiator; a plurality of heat dissipation ducts 12 corresponding to the radiators are also provided in the closed cavity 11, and the radiators are located in the corresponding heat dissipation ducts 12; a flow channel 13 is formed between each two adjacent groups of heat dissipation ducts 12.

[0060] The second component 6 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. The multi-phase second component 6 is distributed at intervals along the second direction, and the main heat-generating outer surface of each phase second component 6 is parallel to the first direction.

[0061] Since the multi-phase second component parts 6 are distributed at intervals, a flow channel 13 can be formed between every two adjacent heat dissipation ducts 12. In addition, there is a ventilation gap between the outermost second component part 6 and the side panel of the cabinet 1. Each flow channel 13 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 second component part 6 through each flow channel 13 and the ventilation gap to take away the heat and ensure uniform heat dissipation of each phase second component part 6.

[0062] Since the second component 6 is a main power device, it generates a large amount of heat. In order to further improve its heat dissipation efficiency, the second component 6 is equipped with a separate radiator. The radiator is fitted to the second component 6 and can take away the heat generated by the second component 6.

[0063] 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 pass cold air to absorb heat. Therefore, the radiator is arranged in the heat dissipation duct 12. The heat dissipation duct 12 is also located in the closed cavity 11, but is connected to the outside world (the air inlet and air outlet of the heat dissipation duct 12 are respectively arranged on the side panels of the cabinet 1). The outside cold air passes into the heat dissipation duct 12 and blows directly to the radiator to take away the heat of the second element 6. It should be noted that since the radiator is hidden in the heat dissipation duct 12, the specific structure and position of the radiator are not shown in the figure.

[0064] This embodiment rationally utilizes the heat dissipation structure of the second component 6, so that a plurality of spaced heat dissipation ducts 12 form a plurality of flow channels 13. No additional baffles are required to form the flow channels 13, which simplifies the layout of the components inside the cabinet and avoids interference with the components.

[0065] In some embodiments, the cabinet 1 may be configured as follows: Figures 1 to 4 The structure shown, see Figure 1 and Figure 4 The third direction is the height direction of the cabinet 1 , and the internal circulation air outlet 21 is located below the internal circulation air return outlet 22 ; the first direction is the length direction of the cabinet 1 , and the second direction is the width direction of the cabinet 1 .

[0066] Since the airflow needs to form a circulating 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 circulating flow of the airflow, the sequential flow generally flows through the length direction and the up and down direction of the closed cavity 11. Then, in order to adapt to the structure of the closed cavity 11 and the path of the circulating flow of the airflow, the heat exchanger 2, the second element 6 and the first element 4 are spaced apart along the length direction of the cabinet 1, the heat exchanger 2 is back mounted on a side panel perpendicular to the width direction of the cabinet 1, and the heat exchanger 2 is arranged along the height direction of the cabinet 1.

[0067] It should be noted that Figures 1 to 4 Arrow A indicates a first direction, arrow B indicates a second direction, and arrow C indicates a third direction.

[0068] Specifically, the heat exchanger 2 in this embodiment is arranged on the rear side panel of the cabinet 1 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 of the cabinet 1.

[0069] 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 .

[0070] 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.

[0071] Preferably, in order to ensure air outlet efficiency, an air outlet fan 25 is provided at the internal circulation air outlet 21 .

[0072] 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: A cabinet (1) having a closed cavity (11); the cabinet (1) is defined to have a first direction, a second direction and a third direction, wherein the first direction, the second direction and the third direction are orthogonal to each other; 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; the internal circulation air outlet (21) and the internal circulation air return outlet (22) are arranged at intervals along the third direction; A mounting substrate (3) disposed in the closed cavity (11) and directly corresponding to the heat exchanger (2) in the first direction; A first element (4) is arranged in the closed cavity (11) and is located on the leeward side of the mounting substrate (3); as well as A guide fan (5) is arranged in the closed cavity (11), with its air inlet end facing the internal circulation air outlet (21) and its air outlet end facing the first energy element (4); Part of the cold air output from the internal circulation air outlet (21) is directed to the first energy component (4) through the guide fan (5), and the airflow passing through the first energy component (4) enters the heat exchanger (2) from the internal circulation air return outlet (22) for heat exchange.

2. The electrical cabinet according to claim 1, characterized in that: A flow passage (13) is provided in the closed cavity (11); the flow passage (13) is located between the heat exchanger (2) and the mounting substrate (3), and the flow passage (13) extends along the first direction; the internal circulation air outlet (21) faces the air inlet end of the flow passage (13), and the air inlet end of the guide fan (5) faces the air outlet end of the flow passage (13).

3. The electrical cabinet according to claim 2, characterized in that: In the third direction, the flow passage (13) has a first end and a second end, the first end protruding outward relative to the first gas component (4); the internal circulation air outlet (21) is inclined toward the air inlet end of the first end; and the guide fan (5) is located at the air outlet end of the first end.

4. The electrical cabinet according to claim 3, characterized in that: The end surface of the first end portion is blocked by a baffle plate (14).

5. The electrical cabinet according to claim 2, characterized in that: In the third direction, one end of the mounting substrate (3) close to the inner circulation return air outlet (22) protrudes outward relative to the first energy component (4), and an air hole (31) is provided at the protruding portion; the air hole (31) faces the inner circulation return air outlet (22); In the third direction, the flow passage (13) has a first end and a second end, the second end does not protrude from the extended end of the mounting substrate (3); and the air hole (31) is in communication with the second end.

6. The electrical cabinet according to claim 5, characterized in that: The electrical cabinet also includes: The second element (6) corresponds to the second end in the second direction; the air hole (31) faces the second element (6).

7. The electrical cabinet according to claim 6, characterized in that: An airflow guide (7) is provided in the closed cavity (11) around the second energy component (6), and the airflow guide (7) is used to guide part of the cold air output from the internal circulation air outlet (21) to flow around the second energy component (6).

8. The electrical cabinet according to claim 7, characterized in that: The second energy component (6) comprises an upper sub-energy component (61) and a lower sub-energy component (62) which are spaced apart along the third direction; the air passage hole (31) faces the upper sub-energy component (61); and the heat generation of the upper sub-energy component (61) is greater than the heat generation of the lower sub-energy component (62).

9. The electrical cabinet according to claim 6, characterized in that: The second energy component (6) is distributed in multiple phases at intervals along the second direction, and each phase of the second energy component (6) is fitted and connected to a heat sink; A plurality of groups of heat dissipation air ducts (12) corresponding one to one with the radiators are also provided in the closed cavity (11); the radiators are located in the corresponding heat dissipation air ducts (12); and the flow passage (13) is formed between every two adjacent groups of heat dissipation air ducts (12).

10. The electrical cabinet according to claim 1, characterized in that: The third direction is the height direction of the cabinet (1), and the internal circulation air outlet (21) is located below the internal circulation air return outlet (22); the first direction is the length direction of the cabinet (1).

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