Electrical equipment

Abstract

The invention provides electrical equipment, which belongs to the technical field of power electronics and comprises a box body, a turbulent flow fan, a first power device group, a third power device group and a heat exchange structure. An inner cavity of the box body is divided into a first cavity body and a second cavity body, the turbulent flow fan, the first power device set and the third power device set are all arranged in the first cavity body, and the positions and the air inlet and outlet directions of the turbulent flow fan and the heat exchange structure are configured. Therefore, two relatively cold air flows passing through the heat exchange structure preferentially pass through the first power device group with relatively low heat productivity, and after the first power device group collides with the second power device group, the third power device group with high heat productivity and relatively high temperature resistance is cooled, and backflow or local backflow is formed. And the temperature rise problem of the whole inner ring temperature and the local key device is well considered.

Description

Technical Field

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

[0002] For certain electrical equipment used in harsh environments such as high temperature, high humidity, and high dust, high sealing performance and high protection levels are required to protect the internal power devices. Power devices generate heat during operation, necessitating heat dissipation. Conventional heat dissipation methods involve continuously optimizing the airflow design of the internal enclosure of the electrical equipment to distribute the heat evenly within the enclosure, achieving a uniform temperature, and ultimately transferring the heat to the external environment via the enclosure's side walls.

[0003] As the power of power devices continues to increase, the heat dissipation problem of electrical equipment is becoming more and more prominent. The effect of relying solely on the natural convection and radiation heat dissipation from the side wall of the equipment enclosure is very limited, resulting in poor heat dissipation of electrical equipment with high protection levels.

[0004] In existing technologies, a high-protection chamber and a low-protection chamber are typically formed within the equipment. A turbulence fan is used in the high-protection chamber, along with an air-to-air heat exchanger installed in the low-protection chamber, to reduce the internal ambient temperature of the high-protection chamber. However, the high-protection chamber contains a complex and numerous internal component, and the electrical equipment demands high power density, resulting in limited usable space within the high-protection chamber itself. Consequently, it is difficult to determine the appropriate placement of the turbulence fan and heat exchanger to meet the required internal ambient temperature within the high-protection chamber. Summary of the Invention

[0005] The purpose of this invention is to provide an electrical device that solves the technical problem of poor heat dissipation in the internal cavity of electrical devices with high protection levels in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An electrical device is provided, comprising: a housing having a first direction; the inner cavity of the housing being divided into a first cavity and a second cavity that are not interconnected, the first cavity being a closed cavity, and the first cavity and the second cavity being spaced apart along the first direction; a first power device group disposed within the first cavity, having a first temperature resistance and a first heat generation; a third power device group disposed within the first cavity, having a third temperature resistance higher than the first temperature resistance and a third heat generation higher than the first heat generation; the third power device group and the first power device group being spaced apart along a second direction; and turbulence. A fan is disposed within the first cavity and includes a first fan unit and a second fan unit; the first fan unit is disposed corresponding to the first power device group and is used to form two opposing airflows along a third direction within the first cavity; the second fan unit is disposed corresponding to the third power device group and is used to extract the airflow delivered by the first fan unit and return it to the air inlet side of the first fan unit; wherein the first direction, the second direction, and the third direction are perpendicular to each other; and a heat exchange structure is disposed partly within the first cavity and partly within the second cavity; the portion of the heat exchange structure disposed within the first cavity corresponds to the fan of the first fan unit.

[0007] The beneficial effects of the electrical equipment provided by this invention are as follows: The use of a sealed first cavity enables the electrical equipment to possess high sealing performance and a high protection level. Furthermore, compared to existing technologies, it is generally believed that solving the problem of internal ambient temperature within the first cavity requires prioritizing the overall disturbance of the airflow within the first cavity to form a large airflow circulation that traverses all components, avoiding the formation of localized hot spots. However, the inventors of this invention have discovered through research and experimentation that in some electrical equipment, while only considering the formation of airflow circulation can reduce the overall internal ambient temperature and avoid the formation of localized hot spots, it cannot adequately meet the technical specifications for keeping the surface temperature below the temperature resistance of certain power devices with lower temperature resistance, easily damaging these temperature-sensitive devices.

[0008] To address this, the present invention reclassifies and rearranges the devices within the first cavity based on their heat generation and temperature resistance, forming a first group of power devices with lower temperature resistance and a third group of power devices with higher heat generation. Based on this, the positions and airflow directions of the turbulence fan and heat exchange structure are configured so that the two relatively cool airflows passing through the heat exchange structure preferentially pass through the first group of power devices with relatively low heat generation. After colliding with each other and enhancing the heat transfer coefficient, the airflow then dissipates heat from the third group of power devices, which has high heat generation but also high temperature resistance, forming a recirculation or partial recirculation.

[0009] In other words, this invention considers the balance between the heat generation and temperature resistance of the device, and accordingly designs a first fan unit and a second fan unit for the first power device group and the third power device group, respectively. The first fan unit is equipped with a heat exchange structure that can exchange heat with the outside to form cold air. The large circulation of the prior art is changed to a combination of collision airflow and small circulation. It prioritizes using a cooler airflow to blow over the first power device group with low heat generation and low temperature resistance, and then blows over the third power device group with high heat generation and high temperature resistance after collision.

[0010] This design places the first power device group at the lowest ambient temperature within the first cavity, effectively solving the problem of the first power device group being prone to overheating. Furthermore, since the first power device group itself does not generate much heat, the temperature rise of the airflow passing through it is also very small. Therefore, it will not have a significant impact on the third power device group, which generates more heat. This design achieves a good balance between overall inner ambient temperature and the temperature rise of local key components. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 Simplified structural formula of electrical equipment provided in the embodiments of the present invention Figure 1 (The left side panel of the box is omitted in the picture);

[0013] Figure 2 Simplified structural formula of electrical equipment provided in the embodiments of the present invention Figure 2 (The front panel of the box is omitted in the picture);

[0014] Figure 3 Simplified structural formula of electrical equipment provided in the embodiments of the present invention Figure 3 (The rear panel of the box is omitted in the picture);

[0015] Figure 4 A schematic diagram of the structure of the electrical equipment provided in the embodiments of the present invention. Figure 1 (The side panels of the box are omitted in the picture);

[0016] Figure 2 A schematic diagram of the structure of the electrical equipment provided in the embodiments of the present invention. Figure 5 ;

[0017] Figure 2 This is a schematic diagram of the heat exchange structure of the electrical equipment provided in an embodiment of the present invention;

[0018] Figure 6 A schematic diagram of the structure of an electrical device provided for another embodiment of the present invention (the side panels of the enclosure are omitted in the figure);

[0019] Figure 7 This is a schematic diagram of the heat exchange structure of the electrical equipment provided in an embodiment of the present invention.

[0020] In the picture:

[0021] 1. Housing; 11. First cavity; 12. Second cavity; 13. Air inlet; 14. Air outlet;

[0022] 21. First fan; 22. Second fan; 23. Third fan;

[0023] 31. First power device group; 32. Second power device group; 33. Third power device group; 34. Separator; 35. Guide plate;

[0024] 4. Heat exchange structure; 41. First heat exchanger; 42. Second heat exchanger; 43. Heat exchange tube assembly; 44. Fixing plate; 45. First heat exchange toothed plate; 46. Second heat exchange toothed plate; 47. First baffle; 48. Second baffle;

[0025] 51. Cooling fan unit; 52. Radiator;

[0026] 6. Inductance. Detailed Implementation

[0027] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] It should be noted that the orientation or positional relationship indicated by "front", "rear", "inner", "outer", "upper", and "lower" in this embodiment is based on the orientation of the electrical equipment itself after installation. The front of the electrical equipment represents "front", the back represents "rear", the top represents "upper", the bottom represents "lower", the "inner" side refers to the side facing the inside of the electrical equipment, and the "outer" side refers to the side facing the outside of the electrical equipment.

[0029] Please refer to the following: Figure 8 , Figure 1 and Figure 2 and Figure 4 The electrical equipment provided by this invention will now be described. The electrical equipment in this embodiment is a wall-mounted string photovoltaic inverter. The electrical equipment includes a housing 1, a turbulence fan, a first power device group 31, a second power device group 32, a third power device group 33, and a heat exchange structure 4.

[0030] The housing 1 has a first direction. The inner cavity of the housing 1 is divided into a first cavity 11 and a second cavity 12 that are not connected to each other. The first cavity 11 is a closed cavity, and the first cavity 11 and the second cavity 12 are spaced apart along the first direction.

[0031] The first power device group 31 is disposed within the first cavity 11 and has a first temperature resistance and a first heat generation. In this embodiment, the first power device group consists of the flying capacitor and bus capacitor on the power amplifier board. Its heat generation is relatively small, but its temperature resistance is also relatively low, typically around 85°C. The preset temperature resistance defined here can be understood as the limit temperature at which the power device cannot function properly; that is, when the temperature reaches a certain value, the power device will be damaged and unable to operate within that temperature range.

[0032] The second power device group 32 is disposed within the first cavity 11 and is spaced apart from the first power device group 31 along the first direction. The second power device group 32 has a second temperature resistance higher than the first temperature resistance and a second heat generation lower than the third heat generation. In this embodiment, the second power device group mainly includes devices on the auxiliary power board and the main control board, which also have relatively low heat generation but high temperature resistance, typically above 120°C.

[0033] The third power device group 33 is disposed within the first cavity 11 and has a third temperature resistance higher than the first temperature resistance and a third heat generation higher than the first heat generation. The third power device group 33, the first power device group 31, and the second power device group are distributed at intervals along a second direction. In this embodiment, the second power device group mainly includes filter capacitors and filter inductors on a filter board. Its heat generation is relatively high among the high-protection devices in the string photovoltaic inverter, but its temperature resistance is relatively high, typically above 150°C.

[0034] A turbulence fan is disposed within the first cavity 11 and includes a first fan unit and a second fan unit. The first fan unit is disposed corresponding to the first power device group 31 to cool the first power device group 31 and to form two opposing airflows along a third direction within the first cavity 11. The second fan unit is disposed corresponding to the third power device group 33 to cool the second power device group 32 and to extract the airflow from the first fan unit and return it to the air inlet side of the first fan unit. The first direction, the second direction, and the third direction are perpendicular to each other. It is understood that the first fan unit needs to include two fans, and the second fan unit can have two fans or one fan. Specifically, the airflow directions of the two fans included in the first fan unit can be as follows: Figure 7 The parallel and relative arrangement shown can also be as follows: Figure 7The vertical arrangement shown utilizes the walls of the first cavity 11 to direct airflow in a third direction to achieve airflow collision.

[0035] The heat exchange structure 4 is partially placed inside the first cavity 11 and partially placed inside the second cavity 12, so as to utilize the cold air in the second cavity 12 for heat exchange. The portion of the heat exchange structure 4 placed in the first cavity 11 corresponds to the fan setting of the first fan unit. It can be understood that the portion of the heat exchange structure 4 placed in the first cavity 11 can be located on the air inlet side or the air outlet side of the corresponding fan. In this embodiment, the portions of the heat exchange structure 4 placed in the first cavity 11 are all located on the air outlet side of the corresponding fan.

[0036] It should be noted that the box 1 is generally a regular hexahedral structure with three directions: front-back, up-down, and left-right. The first direction defined above can be any one of the front-back, up-down, and left-right directions. The first cavity 11 and the second cavity 12 are distributed at intervals along the first direction.

[0037] The first cavity 11 is a closed cavity with a high protection level, used to house power devices to ensure that when the electrical equipment is used in harsh environments such as high temperature, high humidity, and high dust, the power devices will not be corroded or interfered with by the external environment. The second cavity 12 is an open cavity that can house power devices with low environmental requirements. Moreover, a heat dissipation component can be installed in the second cavity 12, which corresponds to the power devices in the first cavity 11 and is used to absorb the heat of the power devices.

[0038] The first cavity 11 and the second cavity 12 can be separated by a partition plate. This embodiment does not limit the specific separation structure between the first cavity 11 and the second cavity 12, as long as the first cavity 11 and the second cavity 12 can be separated and not connected to each other.

[0039] The turbulence fan is used to force convection of airflow within the first chamber 11, which not only carries heat to the heat exchange structure 4 but also accelerates the airflow velocity, lowers the temperature, and radiates heat outward through the side wall of the housing 1. Utilizing both forced convection and heat conduction for heat dissipation further enhances the heat dissipation effect of the electrical equipment.

[0040] The power devices within the first cavity 11 can be divided into a first power device group 31, a second power device group 32, and a third power device group 33. The second power device group 32 is distributed along a first direction at intervals from the first power device group 31 along a front-back direction, and the third power device group 33 is located above the first power device group 31 and the second power device group 32. It should be noted that... Figure 4 and Figure 1The specific structures of the first power device group 31, the second power device group 32, and the third power device group 33 are not shown; only their installation positions are shown.

[0041] The first power device group 31 and the second power device group 32 are both low-heat-generating devices, and they are spaced apart along the front-to-back direction, which optimizes the layout of power devices in the first cavity 11 and reduces the overall size of the electrical equipment. The third power device group 33 is a high-heat-generating device, located above the first power device group 31 and the second power device group 32. Under the action of each turbulence fan, the airflow passes sequentially through the overlapping part of the first power device group 31 and the second power device group 32, and then through the third power device group 33. Since the heat generation of the third power device group 33 is greater than that of the first power device group 31 and the second power device group 32, the temperature at the location of the third power device group 33 is high, and the airflow temperature after passing through the third power device group 33 is the highest under the action of the turbulence fan. Since the preset temperature resistance of the first power device group 31 is low, the first power device group 31 is placed on the air outlet side of the heat exchange structure 4 to minimize the temperature at the location of the first power device group 31.

[0042] The portion of the heat exchange structure 4 located within the first cavity 11 is upstream of the first power device group 31 and downstream of the third power device group 33. In other words, the heat exchange structure 4 is located at the point of highest ambient temperature within the first cavity 11. After the electrical equipment is operating normally, the ambient temperature within the first cavity 11 is much higher than that within the second cavity 12 (with a temperature difference of 35-40°C). The heat within the first cavity 11 is guided to the heat exchange structure 4 by the turbulence fan and dissipated from the first cavity 11 through the heat exchange structure 4. This results in the lowest temperature at the outlet side of the heat exchange structure 4, i.e., upstream of the first power device group 31. In other words, the first power device group 31 is located at the point of lowest ambient temperature within the first cavity 11.

[0043] Specifically, there are two heat exchange structures 4, with portions of them located on either side of the first power device group 31 along the left-right direction. The first fan unit includes two first turbulence fans, 21 and 23, arranged opposite each other along the third direction. These two fans are located on the left and right sides of the portions of the two heat exchange structures 4 located in the first cavity 11, with their outlet sides directly facing one of the heat exchange structures 4 located in the first cavity 11. The second fan unit includes a second turbulence fan 22, which is spaced apart from one of the first turbulence fans 21 along the second direction and located on the left side of the third power device group 33. The inlet side of the second turbulence fan faces the third power device group 33.

[0044] The electrical equipment of the present invention utilizes a closed first cavity 11 to enable the electrical equipment to have high sealing performance and high protection level. Furthermore, the inventors of the present invention have discovered through research and experimentation that in some electrical equipment, if only the formation of airflow circulation is considered, although the overall internal temperature can be reduced and the formation of local hot spots can be avoided, it cannot well meet the technical specifications for keeping the surface temperature below the temperature resistance of certain power devices with low temperature resistance, and it is easy to damage the temperature-sensitive device.

[0045] To address this, the present invention reclassifies and rearranges the devices within the first cavity 11 based on their heat generation and temperature resistance, resulting in at least a first power device group 31 with lower temperature resistance and a third power device group 33 with higher heat generation. Based on this, the positions and airflow directions of the turbulence fan and heat exchange structure 4 are configured so that the two relatively cool airflows passing through the heat exchange structure 4 preferentially pass through the first power device group 31, which has relatively low heat generation. After colliding with each other and enhancing the heat transfer coefficient, the airflow then dissipates heat to the third power device group 33, which has high heat generation but also high temperature resistance, forming a recirculation or partial recirculation.

[0046] In other words, the present invention takes into account the balance between the heat generation and temperature resistance of the device, and designs a first fan unit and a second fan unit for the first power device group 31 and the third power device group 33, respectively. The first fan unit is provided with a heat exchange structure that can exchange heat with the outside to form cold air. The large circulation of the prior art is changed to a combination of collision airflow and small circulation. It prioritizes blowing the colder airflow over the first power device group 31 with low heat generation and low temperature resistance, and then blowing it over the third power device group 33 with high heat generation and high temperature resistance after collision.

[0047] In this way, the first power device group 31 is located at the lowest ambient temperature in the first cavity 11, which effectively solves the problem that the first power device group 31 is prone to overheating. Since the first power device group 31 itself does not generate much heat, the temperature rise of the airflow passing through it is also very small. Therefore, it will not have a significant impact on the third power device group 33, which generates more heat. It has a good balance between the overall inner ambient temperature and the temperature rise of local key devices.

[0048] Based on airflow characteristics, hot air rises and cold air sinks below it. To prevent the heat generated by the third power device group 33 from affecting the first power device group 31 and the second power device group 32, in this embodiment, the third power device group 33, which generates more heat, is located in the upper half of the first cavity 11, while the first power device group 31 and the second power device group 32, which generate less heat, are located in the lower half of the first cavity 11. Furthermore, to reduce the footprint of the electrical equipment and facilitate assembly with fixed objects, the housing 1 is placed vertically; that is, the height of the housing 1 is vertical. Moreover, for ease of maintenance, the power devices are generally positioned facing forward and the heat dissipation components facing backward. Figure 2 ,as well as Figures 1 to 5 This defines the orientation of the electrical equipment after installation.

[0049] exist Figure 7 and Figure 4 In the middle, the heat exchange structure 4 on the right side and the first turbulence fan corresponding to it are located on one side of the second power device group 32 along the third direction to directly supply airflow for heat dissipation to the second power device group 32. The heat exchange structure 4 on the left side and the first turbulence fan corresponding to it are located below the second power device group 32. Correspondingly, in some embodiments, the first power device group 31 and the second power device group 32 can be connected by a... Figure 7 as well as Figure 4 As shown in the structure, a partition 34 is provided between the first power device group 31 and the second power device group 32. The partition 34 has a first air passage and a second air passage. The first air passage is located on the outlet side of another heat exchange structure 4 that does not directly supply air to cool the second power device group 32, i.e., the heat exchange structure 4 and the first turbulence fan on the left side of the figure. The second air passage is located to the right of the first air passage, i.e., closer to the other first turbulence fan. In the first direction, the partition 34 is located on one side of the heat exchange structure 4. The partition 34 serves to separate the first power device group 31 and the second power device group 32, facilitating the phased assembly of the first power device group 31 and the second power device group 32. The first and second air passages allow airflow to pass through, ensuring that the airflow distribution to the first power device group 31 and the second power device group 32 is approximately uniform. It should be noted that, in addition to the first and second air passages, multiple other air passages can be provided on the partition 34. These multiple air passages are also used to allow airflow to pass through, further ensuring the smoothness and uniformity of airflow.

[0050] Preferably, the partition 34 is an insulating plate, which also serves to insulate the first power device group 31 and the second power device group 32. Please refer to [link / reference]. Figure 7 and Figure 1Based on the above embodiment, a guide plate 35 is connected to the first and second air passages on the partition 34. The guide plate 35 extends towards the air outlet side of the heat exchange structure 4. The first air passage is located downstream of the heat exchange structure 4. In the airflow direction, one end of the guide plate 35 is connected to the rear sidewall of the first air passage, and the other end extends obliquely towards the air outlet side of the heat exchange structure 4. The guide plate 35 guides part of the airflow towards the second power device group 32, further ensuring that the flow rate distributed to the first power device group 31 and the second power device group 32 is approximately uniform. In addition, a guide plate 35 can also be provided at the second air passage, and guide plates 35 can also be provided at other air passages. The position and guiding direction of the guide plate 35 are determined according to the airflow velocity and flow rate. Thus, through the arrangement of each air passage and guide plate, the airflow between the partition 34 and the first power device group 31 is allowed to dissipate heat to the second power device group 32 through the guide plate 35 and the air passage. This is mainly because there are too many devices inside the photovoltaic inverter in this embodiment, and it is not possible to set large turbulence fans on both sides. Therefore, it is necessary to set up a partition 34, air passage holes and a guide plate 35 to ensure that there is enough airflow to dissipate heat from the second power device group 32.

[0051] In some embodiments, the first power device group 31 has a local hotspot device, the heat generated by which the local hotspot device is higher than that of other devices in the first power device group 31, or the temperature resistance of the local hotspot device is lower than that of other devices in the first power device group 31. The two first turbulence fans 21 and 23 have different air volumes, and their air volumes are configured such that the collision position of the two opposing airflows along the third direction corresponds to the location of the local hotspot device.

[0052] In some embodiments, an air passage exists between the third power device group 33 and the cavity wall of the first cavity 11. The air passage can accelerate airflow speed, thereby increasing the amount of cold air passing through the third power device group 33. The cold airflow passes quickly through the air passage without obstruction, rapidly carrying away the heat dissipated by the third power device group 33 and improving the heat dissipation effect of the first cavity 11. Preferably, the air passage can be formed between the third power device group 33 and the cavity wall of the first cavity 11 by raising the third power device group 33. In the first direction, the front side of the third power device group 33 is approximately aligned with the front side of the second power device group 32, and the rear side is spaced apart from the cavity wall of the first cavity 11 to form the air passage.

[0053] In some embodiments, a shroud (located at the position of reference numeral 33) is also provided corresponding to the third power device group 33, which has an air inlet and an air outlet opposite to each other in the left and right directions; the air inlet side of the second turbulence fan 22 is provided corresponding to the air outlet of the shroud.

[0054] In some embodiments, the heat exchange structure 4 described above can be as follows: Figure 4 The structure shown is described in the following document. Figure 6 The heat exchange structure 4 includes a first heat exchanger 41, a second heat exchanger 42, a heat exchange tube assembly 43, and a fixing plate 44. The first heat exchanger 41 is disposed in the first cavity 11, located upstream of the first power device assembly 31 and downstream of the third power device assembly 33; the second heat exchanger 42 is disposed in the second cavity 12; the fixing plate 44 is located between the first heat exchanger 41 and the second heat exchanger 42 and is fixed in the second cavity 12; the heat exchange tube assembly 43 contains a phase change heat exchange medium and passes through the first heat exchanger 41, the fixing plate 44, and the second heat exchanger 42.

[0055] The first heat exchanger 41 is used to absorb heat in the first cavity 11, and the heat exchange tube assembly 43 is used to transfer heat. The temperature difference between the two ends of the heat exchange tube assembly 43 is less than 3°C. Since the heat exchange tube assembly 43 is installed between the first heat exchanger 41 and the second heat exchanger 42, the heat of the first heat exchanger 41 can be dissipated to the second heat exchanger 42 through the heat exchange tube assembly 43, thereby dissipating heat out of the first cavity 11.

[0056] It should be noted that, in order to optimize the heat exchange effect, the heat exchange tube assembly 43 includes multiple heat exchange tubes. Figure 6 The chamber has eight heat exchange tubes, which can be straight or curved. To improve heat exchange efficiency and reduce the thickness of the chamber 1 in the front-to-back direction, the heat exchange tubes are preferably straight. The multiple heat exchange tubes have the same structure, with one end of each heat exchange tube close to the partition plate 34 and the other end close to the rear side plate of the chamber 1.

[0057] The fixing plate 44 is fixed on the front cavity wall of the second cavity 12, which serves to fix the heat exchange structure 4, thereby simplifying the fixing method of the heat exchange structure 4 and making it easier to assemble.

[0058] Preferably, based on the above embodiments, the first heat exchanger 41 includes a plurality of parallel and spaced-apart first heat exchanger blades 45; the surface of the first heat exchanger blades 45 is perpendicular to the first direction; in the first direction, the second heat exchanger 42 is directly opposite to the first heat exchanger 41; the second heat exchanger 42 includes a plurality of parallel and spaced-apart second heat exchanger blades 46; the surface of the second heat exchanger blades 46 is perpendicular to the first direction.

[0059] The heat exchange structure 4 adopts the form of heat exchange fins. The heat exchange fins have a large heat dissipation area and ventilation gaps, which is conducive to the rapid dissipation of heat. In addition, multiple first heat exchange fins 45 and multiple second heat exchange fins 46 are connected by multiple heat exchange tubes, eliminating the need to add connection structures for each of the multiple first heat exchange fins 45 and multiple second heat exchange fins 46. This not only simplifies the overall heat exchange structure but also facilitates the assembly of heat exchange tubes.

[0060] The design of the number of teeth and the tooth spacing of the first heat exchanger 45 and the second heat exchanger 46 can be combined with parameters such as total heat and internal and external temperature difference.

[0061] In addition, in the direction perpendicular to the airflow direction, each first heat exchange tooth 45 has a first flange extending to its adjacent first heat exchange tooth 45 on both sides, and multiple first flanges are connected in sequence to form a first baffle 47; each second heat exchange tooth 46 has a second flange extending to its adjacent second heat exchange tooth 46 on both sides, and multiple second flanges are connected in sequence to form a second baffle 48.

[0062] Each of the first heat exchanger 45 has a first flange on both sides, and multiple first flanges form a first baffle 47. That is, the first heat exchanger 41 has a first baffle 47 on both sides. The surface of the first baffle 47 is perpendicular to the airflow direction, which serves to prevent the airflow from spreading outward. Two first baffles 47 can form a channel, so that the airflow can only pass through the first heat exchanger 41, thereby improving the heat exchange efficiency.

[0063] Similarly, each of the second heat exchanger 46 has a second flange on both sides, and multiple second flanges form a second baffle 48. That is to say, the second heat exchanger 42 has a second baffle 48 on both sides. The surface of the second baffle 48 is perpendicular to the airflow direction, which serves to prevent the airflow from spreading outward. The two second baffles 48 can form a channel, so that the airflow can only pass through the second heat exchanger 42, thereby improving the heat exchange efficiency.

[0064] In some embodiments, the heat exchange tube assembly 43 described above can be adopted as follows: Figure Six The structure shown is described in the following document. Figure 6 The heat exchange tube group 43 includes multiple rows of heat exchange tubes, with each pair of adjacent rows of heat exchange tubes staggered.

[0065] Multiple rows of heat exchange tubes are spaced apart along the airflow direction. Because each pair of adjacent heat exchange tubes is staggered, the airflow can rush towards the windward side of each heat exchange tube, increasing the windward area and turbulence effect of each heat exchange tube, thereby enhancing turbulent heat transfer.

[0066] like Figure 6 As shown, the airflow direction defined by the plurality of first heat exchanger teeth 45 is a third direction, and the airflow direction defined by the plurality of second heat exchanger teeth 46 is a second direction. This is mainly because the airflow direction in the first cavity 11 is mainly a third direction, and the airflow direction in the second cavity 12 is mainly a second direction.

[0067] In some embodiments, a heat dissipation component may also be provided within the second cavity 12, see [reference]. Figure 8 and Figure 3The heat dissipation components include a cooling fan unit 51 and a radiator 52. The radiator 52 is located on the air outlet side of the cooling fan unit 51; the heat exchange structure 4 is also located on the air outlet side of the cooling fan unit 51. In the direction perpendicular to the air outlet direction of the cooling fan unit 51, the heat exchange structure 4 and the radiator 52 are arranged side by side.

[0068] Specifically, the cooling fan unit 51 has an up-down airflow direction and is located in the lower half of the second cavity 12. The radiator 52 is located on the airflow outlet side of the cooling fan unit 51. In the left-right direction, the heat exchange structure 4 is also located outside the radiator 52. The radiator 52 corresponds to the power device in the first cavity 11 and is used to absorb and dissipate the heat of the power device.

[0069] The heat exchange structure 4 is located on the outside of the radiator 52, specifically, to... Figure 5 For example, the heat exchange structure 4 (i.e., the second heat exchanger 42) is located on the left side of the radiator 52. In addition, an inductor 6 is provided above the second heat exchanger 42, above the radiator 52, and on the outside of the radiator 52.

[0070] Since the heat sink 52 is quite sensitive and does not have high temperature resistance, the heat exchange structure 4 is staggered from the heat sink 52 in the left and right directions to avoid the heat exchanged heat being blown onto the heat sink 52 and affecting the heat dissipation effect on the power devices in the first cavity 11.

[0071] Please see Figure 3 Figure 5 The air outlet direction of the cooling fan unit 51 is up and down; the bottom wall and the lower part of the side wall of the second cavity 12 are provided with air inlets 13, and the upper part of the side wall of the second cavity 12 is provided with air outlets 14.

[0072] Based on the characteristics of airflow, hot air rises and cold air sinks below hot air. Furthermore, to reduce the footprint of this electrical equipment and facilitate assembly with fixed objects, the enclosure 1 is placed vertically; that is, the height of enclosure 1 is vertical. After installation on site, the air inlet 13 is typically located at the bottom, and the air outlet 14 is located at the top.

[0073] Specifically, the air inlet 13 is located on the bottom plate of the enclosure 1, directly below the cooling fan unit 51, and the air outlet 14 is located on the upper half of the rear side plate, the upper half of the left side plate, and the upper half of the right side plate of the enclosure 1, and above the radiator 52. In other words, there are no openings on the top plate of the enclosure 1, which can effectively prevent foreign objects from falling from the top and improve the protection level of the electrical equipment.

[0074] 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 within the protection scope of the present invention.

Claims

1. An electrical device, characterized by The electric device comprises: a box (1) having a first direction; an inner cavity of the box (1) is divided into a first cavity (11) and a second cavity (12) which are not connected to each other, the first cavity (11) is a closed cavity, and the first cavity (11) and the second cavity (12) are spaced apart along the first direction; a first power device group (31) arranged in the first cavity (11), having a first temperature resistance and a first heat generation; a third power device group (33) arranged in the first cavity (11), having a third temperature resistance higher than the first temperature resistance and a third heat generation higher than the first heat generation; the third power device group (33) is distributed along a second direction away from the first power device group (31); a turbulence fan arranged in the first cavity (11) and comprising a first fan unit and a second fan unit; the first fan unit is arranged corresponding to the first power device group (31) and is used to form two air flows colliding along a third direction in the first cavity (11); the second fan unit is arranged corresponding to the third power device group (33) and is used to extract the air flow sent by the first fan unit and make it backflow to the air inlet side of the first fan unit; wherein the first direction, the second direction and the third direction are perpendicular to each other; and a heat exchange structure (4) partially arranged in the first cavity (11) and partially arranged in the second cavity (12); the part of the heat exchange structure (4) arranged in the first cavity (11) corresponds to the fan of the first fan unit.

2. The electric device of claim 1, wherein: the number of the heat exchange structure (4) is two, and the parts of the heat exchange structure (4) arranged in the first cavity (11) are respectively located on both sides of the first power device group (31) along the third direction; the first fan unit comprises two first turbulence fans arranged opposite to each other along the third direction, and the two first turbulence fans are respectively located on both sides of the parts of the heat exchange structure (4) arranged in the first cavity (11) along the third direction, and the air outlet sides of the two first turbulence fans respectively face the parts of the heat exchange structure (4) arranged in the first cavity (11); the second fan unit comprises a second turbulence fan, the second turbulence fan is arranged away from one of the first turbulence fans along the second direction, and is located on one side of the third power device group (33) along the third direction; the air inlet side of the second turbulence fan faces the third power device group (33).

3. The electric device of claim 2, wherein: the first power device group (31) has a local hot spot device, the local hot spot device has a heat generation higher than other devices in the first power device group (31), or the local hot spot device has a temperature resistance lower than other devices in the first power device group (31); the air volumes of the two first turbulence fans are different, and the air volumes are configured so that the collision position of the two air flows colliding along the third direction corresponds to the position of the local hot spot device.

4. The electrical device of claims 1-3, wherein: The second power device group (32) is arranged in the first cavity (11) and is spaced apart from the first power device group (31) along the first direction; the second power device group (32) has a second temperature resistance higher than the first temperature resistance and a second heat generation amount lower than the third heat generation amount; One of the heat exchange structures (4) and one of the first turbulence fans corresponding to the heat exchange structure (4) are located on one side of the second power device group (32) along the third direction to directly supply air to the second power device group (32) for heat dissipation.

5. The electrical device of claim 4, wherein, The first power device group (31) and the second power device group (32) are provided with a partition plate (34), the partition plate (34) is provided with at least one air passing hole, and a flow guide plate (35) is arranged at the air passing hole; at least one air passing hole is arranged on the air outlet side of another heat exchange structure (4) which does not directly supply air to the second power device group (32) for heat dissipation, and the flow guide plate (35) is arranged to extend to the air outlet side of the heat exchange structure (4), so as to allow the airflow between the partition plate (34) and the first power device group (31) to pass through the flow guide plate (35) and the air passing hole to dissipate heat for the second power device group (32).

6. The electrical device of claim 1, wherein, A wind collecting hood corresponding to the third power device group (33) is further arranged, the wind collecting hood has an air inlet and an air outlet opposite along the third direction; the air inlet side of the second turbulence fan is arranged corresponding to the air outlet of the wind collecting hood; In the first direction, there is an air passing channel between the third power device group (33) and the cavity wall of the first cavity (11).

7. The electrical device of claim 1, wherein, The heat exchange structure (4) comprises: A first heat exchange body (41) arranged in the first cavity (11); A second heat exchange body (42) arranged in the second cavity (12); A fixed plate (44) located between the first heat exchange body (41) and the second heat exchange body (42) and fixedly arranged in the second cavity (12); and A heat exchange pipe group (43) provided with phase change heat exchange working medium and arranged between the first heat exchange body (41), the fixed plate (44) and the second heat exchange body (42).

8. The electrical device of claim 7, wherein, The first heat exchange body (41) comprises a plurality of first heat exchange fins (45) arranged in parallel and spaced apart; the fin surface of the first heat exchange fin (45) is perpendicular to the first direction; In the first direction, the second heat exchange body (42) corresponds to the first heat exchange body (41); the second heat exchange body (42) comprises a plurality of second heat exchange fins (46) arranged in parallel and spaced apart; the fin surface of the second heat exchange fin (46) is perpendicular to the first direction; In the first direction, the second heat exchange body (42) corresponds to the first heat exchange body (41); the second heat exchange body (42) comprises a plurality of second heat exchange fins (46) arranged in parallel and spaced apart; the fin surface of the second heat exchange fin (46) is perpendicular to the first direction; Two sides of each of the first heat exchange fins (45) are provided with first flanges extending to the adjacent first heat exchange fins (45), and a plurality of the first flanges are sequentially connected to form a first baffle (47) for collecting wind; two sides of each of the second heat exchange fins (46) are provided with second flanges extending to the adjacent second heat exchange fins (46), and a plurality of the second flanges are sequentially connected to form a second baffle (48) for collecting wind. The air passing direction defined by the plurality of first heat exchange fins (45) is a third direction, and the air passing direction defined by the plurality of second heat exchange fins (46) is a second direction.

9. The electrical device of claim 7, wherein, The heat exchange pipe group (43) comprises a plurality of columns of heat exchange pipes, and each two adjacent columns of the heat exchange pipes are distributed in a staggered manner.

10. The electrical device of claim 1, wherein, The second cavity (12) is further provided with a heat dissipation assembly; the heat dissipation assembly comprises: a heat dissipation fan group (51); and a radiator (52) located at the air outlet side of the heat dissipation fan group (51); Wherein, the heat exchange structure (4) is located at the air outlet side of the heat dissipation fan group (51) in the second cavity (12), and the heat exchange structure (4) and the radiator (52) are arranged side by side in the vertical direction of the air outlet direction of the heat dissipation fan group (51).

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