Electrical equipment

Abstract

The utility model 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 second 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 and a second cavity, and the turbulent flow fan, the first power device group, the second power device and the third power device are all arranged in the first cavity; the second power device group and the first power device group are distributed at intervals, and the third power device group is located at the downstream of the first power device group; the heat exchange structure is partially arranged in the first cavity and located on the upstream of the first power device set and the downstream of the third power device set, and partially arranged in the second cavity. Heat conduction is formed through the heat exchange structure, and the heat dissipation effect is improved; in addition, the first power device group with relatively low temperature resistance is positioned on the air outlet side of the heat exchange structure, so that the service life of the power devices is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of power electronics, and more specifically, relates to an electrical equipment. Background Art

[0002] For some electrical equipment applied in harsh environments such as high temperature, high humidity, and high dust, in order to protect the power devices inside, it is required that the electrical equipment has high sealing performance and high protection level. When the power devices work, they generate heat and need to be cooled. The conventional cooling method is to continuously optimize the air duct design of the internal cabin of the electrical equipment, evenly distribute the heat generation to the inside of the equipment box body to form a uniform temperature, and finally rely on the side wall of the box body to transfer the heat to the external environment.

[0003] With the continuous increase in the power of power devices, the heat dissipation problem of electrical equipment has become more and more prominent. The effects of only relying on natural convection heat dissipation and radiation heat dissipation from the side wall of the equipment box body to the outside are very limited, resulting in poor heat dissipation of electrical equipment with high protection level. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electrical equipment, aiming to solve the technical problem of poor heat dissipation of electrical equipment with high protection level existing in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: providing an electrical equipment, including:

[0006] A box body having a first direction; the inner cavity of the box body is divided into a first cavity and a second cavity that do not communicate with each other. The first cavity is a closed cavity, and the first cavity and the second cavity are spaced along the first direction;

[0007] A turbulent flow fan is arranged in the first cavity and is used to make the air flow in the first cavity circulate around the first direction;

[0008] A first power device group is arranged in the first cavity;

[0009] A second power device group is arranged in the first cavity and is distributed in parallel with the first power device group along the first direction; the preset temperature resistance of the second power device group is greater than that of the first power device group;

[0010] A third power device group is arranged in the first cavity; in the air flow circulation direction, the third power device group is located downstream of the first power device group and the second power device group, and the heat generation of the third power device group is greater than that of the first power device group and the second power device group; and

[0011] A heat exchange structure is partially disposed in the first cavity and partially disposed in the second cavity; in the direction of the airflow circulating flow, the heat exchange structure is located upstream of the first power device group and also downstream of the third power device group.

[0012] In a possible implementation manner, a partition is provided between the first power device group and the second power device group, and the partition is provided with a first air passing hole and a second air passing hole;

[0013] In the direction of the airflow circulating flow, the first air passing hole is located between the air outlet side of the heat exchange structure and the upstream of the first power device group, and the second air passing hole is located downstream of the first power device group.

[0014] In some embodiments, a deflector is connected to the partition at the first air passing hole, and the deflector extends towards the air outlet side of the heat exchange structure.

[0015] In a possible implementation manner, in the first direction, there is an air passing channel between the third power device group and the cavity wall of the first cavity.

[0016] In a possible implementation manner, the turbulent flow fan includes:

[0017] A first fan, disposed downstream of the first power device group and the second power device group, and the air inlet side faces the first power device group and the second power device group; and

[0018] A second fan, disposed downstream of the third power device group, and the air inlet side faces the third power device group.

[0019] In some embodiments, the turbulent flow fan further includes:

[0020] A third fan, disposed downstream of the second fan, and the air outlet side faces the air inlet side of the heat exchange structure.

[0021] In a possible implementation manner, the heat exchange structure includes:

[0022] A first heat exchanger, disposed in the first cavity, located upstream of the first power device group and also downstream of the third power device group;

[0023] A second heat exchanger, disposed in the second cavity;

[0024] A fixing plate, located between the first heat exchanger and the second heat exchanger, and fixedly disposed in the second cavity; and

[0025] A heat exchange tube group, penetrating between the first heat exchanger, the fixing plate and the second heat exchanger.

[0026] In some embodiments, the first heat exchanger includes a plurality of first heat exchange fins that are parallel and spaced apart; the plane of the first heat exchange fin is perpendicular to the first direction;

[0027] In the first direction, the second heat exchanger corresponds to the first heat exchanger; the second heat exchanger includes a plurality of second heat exchange fins that are parallel and spaced apart; the plane of the second heat exchange fin is perpendicular to the first direction;

[0028] Wherein, on both sides of each of the first heat exchange fins in the direction perpendicular to the air flow circulation direction, there are first flanges extending towards the adjacent first heat exchange fins, and the plurality of first flanges are connected in sequence to form a first baffle;

[0029] On both sides of each of the second heat exchange fins, there are second flanges extending towards the adjacent second heat exchange fins, and the plurality of second flanges are connected in sequence to form a second baffle.

[0030] In some embodiments, the heat exchange tube group includes multiple rows of heat exchange tubes, and every two adjacent rows of the heat exchange tubes are arranged in a staggered manner.

[0031] In a possible implementation manner, a heat dissipation component is further provided in the second cavity; the heat dissipation component includes:

[0032] A heat dissipation fan group; and

[0033] A radiator, located on the air outlet side of the heat dissipation fan group;

[0034] Wherein, the heat exchange structure is also located on the air outlet side of the heat dissipation fan group, and in the direction perpendicular to the air outlet direction of the heat dissipation fan group, the heat exchange structure and the radiator are arranged in parallel.

[0035] In some embodiments, the air outlet direction of the heat dissipation fan group is the up and down direction; the bottom wall of the cavity and the lower part of the side wall of the second cavity are provided with air inlets, and the upper part of the side wall of the second cavity is provided with an air outlet.

[0036] The beneficial effects of the electrical equipment provided by the present utility model are as follows: Compared with the prior art, the electrical equipment of the present utility model uses a closed first cavity to endow the electrical equipment with high sealing performance and high protection level; by optimizing the positions of the first power device group, the second power device group, and the third power device group, on the one hand, the third power device group with a large amount of heat generation is located downstream of the first power device group and the second power device group, and the heat exchange structure is used to transfer the heat circulating to the downstream of the third power device group to the second cavity and dissipate it through the second cavity. The heat exchange structure forms heat conduction, which improves the heat dissipation effect compared with the existing heat transfer method through radiation on the side wall of the box body; on the other hand, the first power device group and the second power device group with approximately the same amount of heat generation are arranged at intervals along the first direction, and the first power device group with a lower temperature resistance is located on the air outlet side of the heat exchange structure, that is, at the lowest ambient temperature in the first cavity, which prolongs the service life of the power device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 Structural schematic of the electrical equipment provided by the embodiment of the present utility model Figure 1 (The left side plate of the box body is omitted in the figure);

[0039] Figure 2 Structural schematic of the electrical equipment provided by the embodiment of the present utility model Figure 2 (The front side plate of the box body is omitted in the figure);

[0040] Figure 3 Structural schematic of the electrical equipment provided by the embodiment of the present utility model Figure 3 (The rear side plate of the box body is omitted in the figure);

[0041] Figure 4 Structural schematic of the electrical equipment provided by the embodiment of the present utility model Figure 1 (All side plates of the box body are omitted in the figure);

[0042] Figure 5 Structural schematic of the electrical equipment provided by the embodiment of the present utility model Figure 2 ;

[0043] Figure 6 Structural schematic of the heat exchange structure of the electrical equipment provided by the embodiment of the present utility model.

[0044] In the figure:

[0045] 1. Cabinet; 11. First cavity; 12. Second cavity; 13. Air inlet; 14. Air outlet;

[0046] 21. First fan; 22. Second fan; 23. Third fan;

[0047] 31. First power device group; 32. Second power device group; 33. Third power device group; 34. Partition; 35. Flow guide plate;

[0048] 4. Heat exchange structure; 41. First heat exchanger; 42. Second heat exchanger; 43. Heat exchange tube group; 44. Fixed plate; 45. First heat exchange fin; 46. Second heat exchange fin; 47. First baffle; 48. Second baffle;

[0049] 51. Heat dissipation fan group; 52. Radiator;

[0050] 6. Inductor. Detailed implementation manners

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model 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 only used to explain the present utility model and are not used to limit the present utility model.

[0052] It should be noted that the orientation or positional relationship indicated by "front", "rear", "inner", "outer", "upper", "lower", etc. 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.

[0053] Please refer to Figure 1 、 Figure 2 and Figure 4, the electrical equipment provided by the present utility model will be described below. The electrical equipment includes a box body 1, a turbulent flow 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. The box body 1 has a first direction; the inner cavity of the box body 1 is divided into a first cavity 11 and a second cavity 12 that are not communicated with each other. The first cavity 11 is a closed cavity, and the first cavity 11 and the second cavity 12 are spaced along the first direction; the turbulent flow fan is arranged in the first cavity 11 and is used to make the air flow in the first cavity 11 circulate around the first direction; the first power device group 31 is arranged in the first cavity 11; the second power device group 32 is arranged in the first cavity 11 and is distributed in parallel with the first power device group 31 along the first direction; the preset temperature resistance of the second power device group 32 is greater than that of the first power device group 31; the third power device group 33 is arranged in the first cavity 11; in the air flow circulation direction, the third power device group 33 is located downstream of the first power device group 31 and the second power device group 32, and the heat generation amount 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 heat exchange structure 4 is partially placed in the first cavity 11 and partially placed in the second cavity 12; in the air flow circulation direction, the heat exchange structure 4 is located upstream of the first power device group 31 and also downstream of the third power device group 33.

[0054] It should be noted that the box body 1 is generally a regular hexahedron structure with three directions: front and back, up and down, and left and right. The above-defined first direction is any one of the front and back direction, up and down direction, and left and right direction. The first cavity 11 and the second cavity 12 are spaced along the first direction, and the air flow in the first cavity 11 circulates around the first direction. It can be understood that any flow plane of the air flow circulation is perpendicular to the spacing direction of the first cavity 11 and the second cavity 12.

[0055] The first cavity 11 is a closed cavity with a high protection level and is used to place power devices to ensure that when the electrical equipment is applied in harsh environments such as high temperature, high humidity, and high dust, the power devices will not be eroded and interfered by the external environment, etc.; the second cavity 12 is an open cavity and can place power devices with low environmental requirements, and a heat dissipation component can be arranged in the second cavity 12, and the heat dissipation component corresponds to the power devices in the first cavity 11 and is used to absorb the heat of the power devices.

[0056] The first cavity 11 and the second cavity 12 can be separated by an intermediate partition. In this embodiment, the specific separation structure between the first cavity 11 and the second cavity 12 is not limited, as long as the first cavity 11 and the second cavity 12 can be separated and not communicated with each other.

[0057] The spoiler fan is used to promote forced convection of the air flow in the first cavity 11. The air flow circulates, which can not only carry heat to the heat exchange structure 4, but also accelerate the air flow velocity, reduce the temperature, and radiate heat outward through the side wall of the box body 1. By using the dual heat dissipation methods of forced convection and heat conduction, the heat dissipation effect of the electrical equipment is further improved.

[0058] The power devices in 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 arranged side by side with the first power device group 31 along the first direction, and the third power device group 33 is located downstream of the first power device group 31 and the second power device group 32. It should be noted that Figure 1 and Figure 2 do not show the specific structures of the first power device group 31, the second power device group 32, and the third power device group 33, but only show the installation positions of the first power device group 31, the second power device group 32, and the third power device group 33.

[0059] Both the first power device group 31 and the second power device group 32 are low-heat-generating devices. They are arranged side by side along the first direction, which can optimize the layout of the power devices in the first cavity 11 and reduce the overall volume of the electrical equipment. The third power device group 33 is a high-heat-generating device.

[0060] Under the action of the spoiler fan, the air flow sequentially passes through the overlapping parts of the first power device group 31 and the second power device group 32, and then passes 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 position where the third power device group 33 is located is high, and under the action of the spoiler fan, the temperature at the downstream position of the third power device group 33 is the highest.

[0061] The part of the heat exchange structure 4 placed in the first cavity 11 is located upstream of the first power device group 31 and also downstream of the third power device group 33. That is to say, the heat exchange structure 4 is located at the highest ambient temperature in the first cavity 11. After the electrical equipment works normally, the ambient temperature in the first cavity 11 is much higher than that in the second cavity 12 (with a temperature difference of 35 - 40 °C). The heat in the first cavity 11 is guided to the heat exchange structure 4 by the spoiler fan and dissipated from the first cavity 11 through the heat exchange structure 4, so that the temperature at the air outlet side of the heat exchange structure 4, that is, upstream of the first power device group 31, is the lowest. That is to say, the first power device group 31 is at the lowest ambient temperature in the first cavity 11.

[0062] The preset temperature tolerance of the second power device group 32 is greater than that of the first power device group 31. The preset temperature tolerance defined here can be understood as the limit temperature value at which the power device cannot work properly, that is, when the temperature reaches a certain value, the power device will be damaged and unable to work within this temperature. Since the preset temperature tolerance of the first power device group 31 is small, the first power device group 31 is arranged on the air outlet side of the heat exchange structure 4 so that the temperature at the position where the first power device group 31 is located is the lowest.

[0063] Compared with the prior art, the electrical equipment of the present utility model uses the enclosed first cavity 11 to enable the electrical equipment to have high sealing performance and high protection level; by optimizing the positions of the first power device group 31, the second power device group 32 and the third power device group 33, on the one hand, the third power device group 33 with large heat generation is located downstream of the first power device group 31 and the second power device group 32, and the heat exchange structure 4 transfers the heat circulating to the downstream of the third power device group 33 to the second cavity 12 and dissipates it through the second cavity 12. The heat exchange structure 4 forms heat conduction, which improves the heat dissipation effect compared with the existing heat transfer method by radiation through the side wall of the box body 1; on the other hand, the first power device group 31 and the second power device group 32 with approximately the same heat generation are arranged side by side along the first direction, and the first power device group 31 with lower temperature resistance is located on the air outlet side of the heat exchange structure 4, that is, at the lowest ambient temperature in the first cavity 11, which prolongs the service life of the power device.

[0064] According to the air flow characteristics, hot air will float upward and cold air will settle below the hot air. In order to avoid the heat generated by the third power device group 33 affecting the first power device group 31 and the second power device group 32, in this embodiment, the third power device group 33 with high heat generation is arranged in the upper half of the first cavity 11, and the first power device group 31 and the second power device group 32 with low heat generation are arranged in the lower half of the first cavity 11.

[0065] In addition, in order to reduce the occupied area of the electrical equipment and facilitate the assembly with the fixture, the box body 1 is placed in the up-down direction, which can be understood as the height direction of the box body 1 is the up-down direction. And for the convenience of maintenance, generally the power device is facing forward and the heat dissipation component is facing backward. Figures 1 to 5 The orientation of the electrical equipment after installation is defined.

[0066] According to the position definitions of the third power device group 33, the second power device group 32, and the first power device group 31, and the definition of the air flow circulation direction, the above-mentioned first direction is specifically the front-back direction of the box body 1; the first cavity 11 is located in front of the second cavity 12, and the second power device group 32 is located in front of the first power device group 31.

[0067] In some embodiments, the above-mentioned first power device group 31 and the second power device group 32 may adopt a structure as shown in Figure 1 and Figure 4 . Referring to Figure 1 and Figure 4 , a partition 34 is provided between the first power device group 31 and the second power device group 32. The partition 34 is provided with a first air passing hole and a second air passing hole. In the air flow circulation direction, the first air passing hole is located between the air outlet side of the heat exchange structure 4 and the upstream of the first power device group 31, and the second air passing hole is located downstream of the first power device group 31.

[0068] In the first direction, the partition 34 is located on one side of the heat exchange structure 4. The partition 34 functions to separate the first power device group 31 and the second power device group 32, so as to facilitate the separate assembly of the first power device group 31 and the second power device group 32. The first air passing hole and the second air passing hole are used to allow air flow through, so as to ensure that the air flow rates distributed to the first power device group 31 and the second power device group 32 are substantially uniform.

[0069] It should be noted that in addition to the first air passing hole and the second air passing hole, a plurality of other air passing holes may also be provided on the partition 34. The plurality of air passing holes are also used to allow air flow through, further ensuring the smoothness and uniformity of the air flow circulation.

[0070] Preferably, the partition 34 is an insulating board, and it also functions to insulate the first power device group 31 and the second power device group 32.

[0071] Please refer to Figure 1 and Figure 4 . On the basis of the above-mentioned embodiment, a guide plate 35 is connected to the partition 34 at the first air passing hole, and the guide plate 35 extends towards the air outlet side of the heat exchange structure 4.

[0072] The first air passing hole is located downstream of the heat exchange structure 4. In the air flow direction, one end of the guide plate 35 is connected to the rear side wall of the first air passing hole, and the other end extends obliquely towards the air outlet side of the heat exchange structure 4. The guide plate 35 functions to guide a part of the air flow towards the second power device group 32, further ensuring that the air flow rates distributed to the first power device group 31 and the second power device group 32 are substantially uniform.

[0073] In addition, a guide plate 35 may also be provided at the second air passing hole, and a guide plate 35 may also be provided at other air passing holes. The position and guiding direction of the guide plate 35 are determined according to the air flow velocity and flow rate.

[0074] In some embodiments, there is an air passage between the third power device group 33 and the cavity wall of the first cavity 11. The air passage can accelerate the air flow velocity, thereby increasing the amount of cold air passing through the third power device group 33. The cold air flow quickly passes through the air passage without obstruction, and can quickly take away the heat dissipated by the third power device group 33, improving the heat dissipation effect of the first cavity 11.

[0075] Preferably, the third power device group 33 can be lifted to form an air passage between the third power device group 33 and the cavity wall of the first cavity 11. In the first direction, the front side of the third power device group 33 is substantially aligned with the front side of the second power device group 32, and the rear side is spaced from the cavity wall of the first cavity 11 to form an air passage.

[0076] In some embodiments, the above-mentioned turbulence blower can adopt the structure as Figure 2 and Figure 4 shown, see Figure 2 and Figure 4 , the turbulence blower includes a first blower 21 and a second blower 22. The first blower 21 is arranged downstream of the first power device group 31 and the second power device group 32, and the air inlet side faces the first power device group 31 and the second power device group 32; the second blower 22 is arranged downstream of the third power device group 33, and the air inlet side faces the third power device group 33.

[0077] Both the first blower 21 and the second blower 22 are exhaust blowers. The air inlet side of the first blower 21 faces the first power device group 31 and the second power device group 32, extracting the air flow passing through the first power device group 31 and the second power device group 32. The air inlet side of the second blower 22 faces the third power device group 33, extracting the air flow passing through the third power device group 33, making the air flow in the first cavity 11 form a circulating flow, and taking the heat to the heat exchange structure 4.

[0078] In some embodiments, the above-mentioned turbulence blower can also adopt the structure as Figure 1 and Figure 4 shown, see Figure 1 and Figure 4 , the turbulence blower further includes a third blower 23. The third blower 23 is arranged downstream of the second blower 22, and the air outlet side faces the air inlet side of the heat exchange structure 4.

[0079] The air outlet side of the third blower 23 faces the air inlet side of the heat exchange structure 4. That is to say, the third blower 23 is used to quickly pump all the hot air flow passing through the third power device group 33 to the heat exchange structure 4, increasing the flow velocity of the hot air flow to the heat exchange structure 4, achieving the purpose of rapid heat exchange, and improving the heat dissipation efficiency of the first cavity 11.

[0080] In some embodiments, the above-mentioned heat exchange structure 4 can adopt the structure asFigure 6 The structure shown, refer to Figure 6 , the heat exchange structure 4 includes a first heat exchanger 41, a second heat exchanger 42, a heat exchange tube group 43 and a fixing plate 44. The first heat exchanger 41 is disposed in the first cavity 11, upstream of the first power device group 31 and also downstream of the third power device group 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 group 43 is penetrated between the first heat exchanger 41, the fixing plate 44 and the second heat exchanger 42.

[0081] The first heat exchanger 41 is used to absorb the heat in the first cavity 11, the heat exchange tube group 43 is used to transfer heat, and the temperature difference at both ends of the heat exchange tube group 43 is less than 3 °C. Since the heat exchange tube group 43 is penetrated 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 group 43, so that the heat is dissipated from the first cavity 11.

[0082] It should be noted that, in order to optimize the heat exchange effect, the heat exchange tube group 43 includes multiple heat exchange tubes, Figure 6 there are eight heat exchange tubes in, the heat exchange tubes can be straight tubes or bent tubes. In order to improve the heat exchange efficiency and reduce the thickness of the box 1 in the front-rear direction, the heat exchange tubes are preferably straight tubes. The structures of the multiple heat exchange tubes are the same, and one end of each heat exchange tube is close to the partition 34 and the other end is close to the rear side plate of the box 1.

[0083] The fixing plate 44 is fixed on the front side wall of the second cavity 12, which plays a role in fixing the heat exchange structure 4, so as to simplify the fixing method of the heat exchange structure 4 and make it convenient for assembly.

[0084] Preferably, on the basis of the above embodiment, the first heat exchanger 41 includes a plurality of first heat exchange teeth 45 that are parallel and spaced apart; the plane of the first heat exchange teeth 45 is perpendicular to the first direction; in the first direction, the second heat exchanger 42 corresponds exactly to the first heat exchanger 41; the second heat exchanger 42 includes a plurality of second heat exchange teeth 46 that are parallel and spaced apart; the plane of the second heat exchange teeth 46 is perpendicular to the first direction.

[0085] The heat exchange structure 4 adopts the form of heat exchange teeth. The heat exchange teeth have a large heat dissipation area and there is a ventilation space, which is conducive to rapid heat dissipation; in addition, the plurality of first heat exchange teeth 45 and the plurality of second heat exchange teeth 46 are connected by a plurality of heat exchange tubes, and there is no need to add a connection structure to each of the plurality of first heat exchange teeth 45 and the plurality of second heat exchange teeth 46. This not only simplifies the overall heat exchange structure, but also facilitates the assembly of the heat exchange tubes.

[0086] The design of the number of teeth and the tooth pitch of the first heat exchange teeth 45 and the second heat exchange teeth 46 can be combined with parameters such as the total heat and the internal and external temperature difference.

[0087] In addition, on both sides of each first heat exchange fin 45 in the direction perpendicular to the air flow circulation direction, there are first flanges extending towards the adjacent first heat exchange fins 45, and a plurality of first flanges are connected in sequence to form a first baffle 47; on both sides of each second heat exchange fin 46, there are second flanges extending towards the adjacent second heat exchange fins 46, and a plurality of second flanges are connected in sequence to form a second baffle 48.

[0088] On both sides of each first heat exchange fin 45, there are first flanges, and a plurality of first flanges form a first baffle 47. That is to say, on both sides of the first heat exchange body 41, there are first baffles 47 respectively. The plate surface of the first baffle 47 is perpendicular to the air flow circulation direction, playing a role in blocking the outward diffusion of the air flow. The two first baffles 47 can enclose a channel, enabling the air flow to only pass through the first heat exchange body 41 to improve the heat exchange efficiency.

[0089] Similarly, on both sides of each second heat exchange fin 46, there are second flanges, and a plurality of second flanges form a second baffle 48. That is to say, on both sides of the second heat exchange body 42, there are second baffles 48 respectively. The plate surface of the second baffle 48 is perpendicular to the air flow circulation direction, playing a role in blocking the outward diffusion of the air flow. The two second baffles 48 can enclose a channel, enabling the air flow to only pass through the second heat exchange body 42 to improve the heat exchange efficiency.

[0090] In some embodiments, the above heat exchange tube group 43 can adopt the structure as Figure 6 shown, see Figure 6 , the heat exchange tube group 43 includes multiple rows of heat exchange tubes, and every two adjacent rows of heat exchange tubes are staggeredly distributed.

[0091] The multiple rows of heat exchange tubes are spaced apart along the air flow direction. Since every two adjacent rows of heat exchange tubes are staggeredly distributed, the air flow can rush towards the windward surface of each heat exchange tube, increasing the windward area and the turbulence effect of each heat exchange tube, thereby enhancing the turbulent heat exchange.

[0092] In some embodiments, a heat dissipation component can also be arranged in the above second cavity 12, see Figure 3 and Figure 5 , the heat dissipation component includes a heat dissipation fan group 51 and a radiator 52. The radiator 52 is located on the air outlet side of the heat dissipation fan group 51; the heat exchange structure 4 is also located on the air outlet side of the heat dissipation fan group 51. In the direction perpendicular to the air outlet direction of the heat dissipation fan group 51, the heat exchange structure 4 and the radiator 52 are arranged in parallel.

[0093] Specifically, the air outlet direction of the heat dissipation fan unit 51 is the up-down direction, the heat dissipation fan unit 51 is located in the lower half of the second cavity 12, the radiator 52 is located on the air outlet side of the heat dissipation fan unit 51, and in the left-right direction, the heat exchange structure 4 is also arranged on the outside of 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.

[0094] The heat exchange structure 4 is arranged outside the radiator 52. Figure 3 For example, the heat exchange structure 4 (ie, the second heat exchange body 42 ) is located on the left side of the radiator 52 . In addition, an inductor 6 is disposed above the second heat exchange body 42 , above the radiator 52 , and outside the radiator 52 .

[0095] Since the radiator 52 is relatively sensitive and does not have a high temperature resistance, the heat exchange structure 4 and the radiator 52 are staggered in the left and right directions to prevent the heat from being blown onto the radiator 52 and affecting the heat dissipation effect on the power devices in the first cavity 11.

[0096] See also Figure 5 The air outlet direction of the heat dissipation fan unit 51 is the up and down direction; the bottom wall of the second cavity 12 and the lower part of the cavity side wall are provided with an air inlet 13, and the upper part of the cavity side wall of the second cavity 12 is provided with an air outlet 14.

[0097] According to the air flow characteristics, hot air will float upwards, and cold air will settle below the hot air. In order to reduce the occupied area of ​​the electrical equipment and facilitate assembly with fixed objects, the box 1 is placed in the up-down direction. It can be understood that the height direction of the box 1 is the up-down direction. After the electrical equipment is installed on site, the air inlet 13 is generally located at the bottom and the air outlet 14 is located at the top.

[0098] Specifically, the air inlet 13 is arranged on the bottom plate of the box body 1, directly below the heat dissipation fan unit 51, and the air outlet 14 is arranged on the upper half of the rear side panel, the upper half of the left side panel and the upper half of the right side panel of the box body 1, and is located above the radiator 52. In other words, there is no opening on the top plate of the box body 1, which can effectively prevent foreign objects from falling from the top and improve the protection level of the electrical equipment.

[0099] 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 device, characterized in that, Comprising: A box body (1) having a first direction; the inner cavity of the box body (1) is partitioned into a first cavity (11) and a second cavity (12) that do not communicate with 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 turbulent flow fan disposed in the first cavity (11) for causing the air flow in the first cavity (11) to circulate around the first direction. A first power device group (31) disposed in the first cavity (11). A second power device group (32) disposed in the first cavity (11) and spaced apart from the first power device group (31) along the first direction; the preset temperature resistance of the second power device group (32) is greater than the preset temperature resistance of the first power device group (31). A third power device group (33) disposed in the first cavity (11); in the air flow circulation direction, the third power device group (33) is located downstream of the first power device group (31) and the second power device group (32), and the heat generation of the third power device group (33) is greater than the heat generation of the first power device group (31) and the second power device group (32). And A heat exchange structure (4) with a part disposed in the first cavity (11) and a part disposed in the second cavity (12); in the air flow circulation direction, the heat exchange structure (4) is located upstream of the first power device group (31) and also downstream of the third power device group (33).

2. The electrical device according to claim 1, wherein A partition plate (34) is provided between the first power device group (31) and the second power device group (32), and the partition plate (34) is provided with a first air passing hole and a second air passing hole. In the air flow circulation direction, the first air passing hole is located between the air outlet side of the heat exchange structure (4) and the upstream of the first power device group (31), and the second air passing hole is located downstream of the first power device group (31).

3. The electrical device according to claim 2, wherein, A flow guide plate (35) is connected to the partition plate (34) at the first air passing hole, and the flow guide plate (35) extends towards the air outlet side of the heat exchange structure (4).

4. The electrical device according to claim 1, characterized in that, 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).

5. The electrical device according to claim 1, characterized in that, The turbulent flow fan includes: A first fan (21) disposed downstream of the first power device group (31) and the second power device group (32), with the air inlet side facing the first power device group (31) and the second power device group (32); and A second fan (22) disposed downstream of the third power device group (33), with the air inlet side facing the third power device group (33).

6. The electrical device according to claim 5, characterized in that, The turbulent flow fan further includes: A third fan (23) disposed downstream of the second fan (22), and the air outlet side faces the air inlet side of the heat exchange structure (4).

7. The electrical device according to claim 1, wherein, The heat exchange structure (4) includes: The first heat exchanger (41) is disposed in the first cavity (11), upstream of the first power device group (31) and also downstream of the third power device group (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 fixedly disposed in the second cavity (12); and The heat exchange tube group (43) is arranged to pass through the first heat exchanger (41), the fixing plate (44) and the second heat exchanger (42).

8. The electrical device according to claim 7, characterized in that, The first heat exchanger (41) includes a plurality of first heat exchange fins (45) that are parallel and spaced apart; the plane of the first heat exchange fin (45) is perpendicular to the first direction; In the first direction, the second heat exchanger (42) corresponds exactly to the first heat exchanger (41); the second heat exchanger (42) includes a plurality of second heat exchange fins (46) that are parallel and spaced apart; the plane of the second heat exchange fin (46) is perpendicular to the first direction; Wherein, on both sides of each of the first heat exchange fins (45) in the direction perpendicular to the air flow circulation direction, there are first flanges extending towards the adjacent first heat exchange fins (45), and the plurality of first flanges are connected in sequence to form a first baffle (47); On both sides of each of the second heat exchange fins (46), there are second flanges extending towards the adjacent second heat exchange fins (46), and the plurality of second flanges are connected in sequence to form a second baffle (48).

9. The electrical device according to claim 7, characterized in that, The heat exchange tube group (43) includes multiple columns of heat exchange tubes, and every two adjacent columns of the heat exchange tubes are arranged in a staggered manner.

10. The electrical device according to claim 1, characterized in that, A heat dissipation assembly is further disposed in the second cavity (12); the heat dissipation assembly includes: A heat dissipation fan group (51); and A radiator (52), located on the air outlet side of the heat dissipation fan group (51); Wherein, the heat exchange structure (4) is also located on the air outlet side of the heat dissipation fan group (51), and in the direction perpendicular to the air outlet direction of the heat dissipation fan group (51), the heat exchange structure (4) and the radiator (52) are arranged side by side.

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