Power conversion device

Abstract

The utility model discloses a power conversion device, and relates to the technical field of new energy equipment, the power conversion device comprises a cabinet, an electrical part and a first heat dissipation part, the cabinet is internally provided with an accommodating cavity, and the cabinet is provided with a first installation port communicated with the accommodating cavity; the electrical part is arranged in the accommodating cavity; the first heat dissipation piece comprises a cover body and a first fan, the cover body covers the first installation opening, an air channel cavity is formed in the cover body, the cover body is provided with an air outlet communicating with the containing cavity and the air channel cavity, the air outlet faces the electrical piece, the air inlet end of the first fan communicates with the containing cavity, and the air outlet end of the first fan communicates with the air channel cavity. According to the technical scheme, the heat dissipation effect of the power conversion device is improved.

Description

TECHNICAL FIELD

[0001] Embodiments in the present application relate to the technical field of new energy equipment, in particular to a power conversion device. BACKGROUND

[0002] In the related art, the power conversion device usually utilizes a case to form a certain closed environment, so that the components of the power conversion device are stably arranged in the case, a liquid cooling plate or other heat dissipation components are used to contact and conduct heat with the components in the case, and a fan is used to directly blow air to disturb the flow and dissipate heat towards the components in the case, so as to achieve better heat dissipation effect of the power conversion device.

[0003] However, the heat generating components of the power conversion device are distributed relatively dispersedly in the case, and the heat dissipation air flow generated by the fan in the case cannot well flow through the multiple heat generating components, resulting in low heat dissipation efficiency of the power conversion device, and reducing the heat dissipation effect and operation stability of the power conversion device. CONTENT OF THE UTILITY MODEL

[0004] Embodiments in the present application propose a power conversion device, aiming to improve the heat dissipation effect of the power conversion device.

[0005] An embodiment in the present application proposes a power conversion device including a case, an electrical component, and a first heat dissipation component, the case is provided with a receiving cavity, and the case is provided with a first mounting opening communicating with the receiving cavity; the electrical component is arranged in the receiving cavity; the first heat dissipation component includes a cover body and a first fan, the cover body covers the first mounting opening, the cover body is provided with an air duct cavity, the cover body is provided with an exhaust opening communicating with the receiving cavity and the air duct cavity, the exhaust opening is arranged towards the electrical component, an air inlet end of the first fan is in communication with the receiving cavity, and an air outlet end of the first fan is in communication with the air duct cavity.

[0006] In an embodiment, at least one flow guide protrusion is arranged on one side of the cover body facing the electrical component, the flow guide protrusion is arranged in a hollow manner and is in communication with the air duct cavity, and the exhaust opening is arranged on the flow guide protrusion.

[0007] In an embodiment, the first heat dissipation component further includes a first heat dissipation fin, the first heat dissipation fin is connected to the cover body and arranged in the air duct cavity.

[0008] In an embodiment, the first heat dissipation component further includes a second heat dissipation fin, the second heat dissipation fin is connected to one side of the cover body opposite to the case.

[0009] In an embodiment, the first heat dissipation component further includes a first liquid cooling plate, and the first liquid cooling plate is arranged in the air duct cavity.

[0010] In an embodiment, the first heat dissipation member further comprises a third heat dissipation fin connected to the outer side of the first liquid cooling plate.

[0011] In an embodiment, the cover is provided with an air inlet communicating with the air duct cavity at the side of the cover facing the electrical component, and the first fan is connected to the side of the cover facing the electrical component, and the air outlet end of the first fan covers the air inlet.

[0012] In an embodiment, the cover comprises a surrounding plate connected to the side of the cover facing the electrical component and arranged around the air inlet, and the surrounding plate surrounds the periphery of the first fan.

[0013] In an embodiment, the cover comprises an upper cover plate connected to the cabinet and covering the first mounting port, and an air duct plate connected to the side of the upper cover plate facing the electrical component and surrounding the upper cover plate to form the air duct cavity, and the air duct plate is provided with the air outlet.

[0014] In an embodiment, the cabinet is further provided with a second mounting port communicating with the receiving cavity, the first mounting port and the second mounting port are arranged opposite to each other, and the power conversion device further comprises a second heat dissipation member, the second heat dissipation member covers the second mounting port and is in heat conduction connection with the electrical component.

[0015] In an embodiment, the second heat dissipation member is a second liquid cooling plate, the second liquid cooling plate covers the second mounting port, and the second liquid cooling plate is in heat conduction connection with the electrical component.

[0016] In an embodiment, the second heat dissipation member comprises a current collecting shell, a heat sink and a second fan, the current collecting shell is connected to the cabinet and covers the second mounting port, the current collecting shell is provided with a ventilation cavity, the ventilation cavity is arranged through both sides of the current collecting shell, the heat sink is arranged in the current collecting shell and is in heat conduction connection with the electrical component, the heat sink comprises a fourth heat dissipation fin, the fourth heat dissipation fin is arranged in the ventilation cavity, and the second fan is connected to the current collecting shell and is arranged at one end of the ventilation cavity, and the second fan blows air towards the ventilation cavity.

[0017] In the various embodiments provided in this application, the first heat sink covers the first mounting opening of the chassis, creating a relatively enclosed cavity inside the chassis to house and protect the electrical components, reducing the impact of the external environment on the electrical components. By using a first fan to gather air from the cavity into a duct cavity, and then using the duct cavity to stably blow the cooling airflow through the exhaust port onto the low-heat components of the electrical components, the cooling airflow inside the chassis can stably act on each component of the electrical components for heat dissipation, achieving sufficient heat dissipation of the power conversion device, ensuring stable operation of the power conversion device, and effectively improving the heat dissipation efficiency of the power conversion device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the power conversion device provided in this application;

[0020] Figure 2 for Figure 1 An exploded view of the structure of an embodiment of a power conversion device;

[0021] Figure 3 for Figure 1 A cross-sectional view of an embodiment of a power conversion device;

[0022] Figure 4 for Figure 3 A schematic diagram of the internal airflow direction of an embodiment of a power conversion device;

[0023] Figure 5 A schematic diagram of the structure of an embodiment of the first heat sink of the power conversion device provided in this application;

[0024] Figure 6 for Figure 5 An exploded view of the structure of an embodiment of the first heat sink;

[0025] Figure 7 for Figure 5 An exploded view of another embodiment of the first heat sink;

[0026] Figure 8 for Figure 5 An exploded view of the structure of another embodiment of the first heat sink;

[0027] Figure 9 for Figure 5Structure exploded view of the first heat dissipation member of another embodiment of the power conversion device according to the present application;

[0028] Figure 10 Structure exploded view of the first heat dissipation member of another embodiment of the power conversion device according to the present application;

[0029] Figure 11 Structure exploded view of the first heat dissipation member of another embodiment of the power conversion device according to the present application;

[0030] Figure 12 Structure exploded view of the first heat dissipation member of another embodiment of the power conversion device according to the present application; Figure 11 Structure exploded view of the first heat dissipation member of another embodiment of the power conversion device according to the present application;

[0031] Figure 13 Structure exploded view of the first heat dissipation member of another embodiment of the power conversion device according to the present application; Figure 12 Structure exploded view of the first heat dissipation member of another embodiment of the power conversion device according to the present application.

[0032] Brief Description of the Drawings:

[0033] 100, power conversion device; 10, cabinet; 11, receiving cavity; 13, first mounting port; 15, second mounting port; 30, electrical component; 50, first heat dissipation member; 51, cover body; 511, air duct cavity; 513, upper cover plate; 5131, first heat dissipation fin; 5133, second heat dissipation fin; 515, air duct plate; 5151, surrounding plate; 5153, air inlet; 5155, air outlet; 5157, flow guide protrusion; 53, first fan; 55, first liquid cooling plate; 551, third heat dissipation fin; 70, second heat dissipation member; 70a, second liquid cooling plate; 71, bus shell; 711, ventilation cavity; 73, heat sink; 75, second fan. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] It should be noted that if the directionality indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of the present application, the directionality indication is only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directionality indication also changes accordingly.

[0036] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes include A scheme, or B scheme, or A and B satisfy the scheme at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0037] In the related art, the power conversion device usually utilizes the case to form a certain closed environment, so that the components of the power conversion device are stably arranged in the case. The heat dissipation assembly such as the liquid cooling plate is in contact with the components to conduct heat, and the fan is directly blown to the components in the case to disturb the flow and dissipate heat, so as to achieve better heat dissipation effect of the power conversion device. However, the distribution of the heat generating components of the power conversion device in the case is relatively dispersed, and the heat dissipation airflow generated by the fan in the case cannot well flow through the multiple heat generating components, resulting in low heat dissipation efficiency of the power conversion device, and reducing the heat dissipation effect and operation stability of the power conversion device.

[0038] It can be understood that the power conversion device can include but is not limited to an inverter, a wind power converter, an energy storage converter and the like, and can realize the conversion and adjustment of the voltage, current, power and the like of electric energy, and has a wide application in the field of new energy such as photovoltaic, wind power and energy storage. In the power conversion device, IGBT (Insulate-Gate Bipolar Transistor), electric reactor, relay, contactor and the like can be installed, and the operation of the electrical components is used to realize the adjustment of electric energy and ensure the stable operation of the power conversion device. Since the IGBT, electric reactor and the like have a large amount of heat, a liquid cooling plate or a forced air cooling device is usually used to conduct heat and dissipate heat for the high-heat devices in the power conversion device; and for the low-heat devices such as capacitors, inductors, relays and contactors, a fan is usually arranged in the case of the power conversion device, and the fan directly disturbs the air in the case to make the air in the case flow to dissipate heat for the low-heat devices. However, the low-heat devices in the power conversion device are relatively dispersed, and the cooling air flow cannot flow through each device well, resulting in poor heat dissipation effect of part of the devices; the current power conversion device generally increases the number of fans in the case to achieve more comprehensive air disturbance and heat dissipation in the case, and increasing the number of fans increases the production cost and operating energy consumption of the power conversion device, and increases the weight and volume of the whole machine, reducing the practicability of the power conversion device. In view of the above problems, the power conversion device 100 is provided.

[0039] Please refer to Figures 1 to 13 In an embodiment of the present application, the power conversion device 100 includes a case 10, an electrical component 30 and a first heat dissipation component 50, the case 10 is provided with a receiving cavity 11, and the case 10 is provided with a first mounting port 13 communicating with the receiving cavity 11; the electrical component 30 is arranged in the receiving cavity 11; the first heat dissipation component 50 includes a cover body 51 and a first fan 53, the cover body 51 covers the first mounting port 13, the cover body 51 is provided with an air duct cavity 511, and the cover body 51 is provided with an exhaust port 5155 communicating with the receiving cavity 11 and the air duct cavity 511, the exhaust port 5155 is arranged towards the electrical component 30, and the air inlet end of the first fan 53 communicates with the receiving cavity 11, and the air outlet end of the first fan 53 communicates with the air duct cavity 511.

[0040] In the present application, the cabinet 10 can be provided as a hollow box structure, so that a receiving cavity 11 with a certain accommodation space can be formed inside the cabinet 10, so that the electrical components 30 of the power conversion device 100 can be stably arranged in the receiving cavity 11, avoiding the influence of the external environment on the power conversion device 100. The first mounting port 13 and the second mounting port 15 can be provided on the cabinet 10, respectively, which can be located on opposite sides of the cabinet, and the electrical components 30 can be more conveniently assembled into the receiving cavity 11 through the first mounting port 13 and the second mounting port 15. At this time, the first heat dissipation member 50 is used to cover the first mounting port 13 of the cabinet 10, and the second heat dissipation member 70 is used to cover the second mounting port 15 of the cabinet 10, or a bottom plate can be provided to cover the second mounting port 15, so that the receiving cavity 11 of the cabinet 10 forms a relatively closed environment, realizes the whole machine packaging of the power conversion device 100, and guarantees the stable operation of the power conversion device 100.

[0041] The electrical components 30 can be arranged close to the first mounting port 13 in the cabinet 10, and the first heat dissipation member 50 is used to cover the first mounting port 13, so that the first heat dissipation member 50 can be used to disturb the airflow in the cabinet 10 to achieve heat dissipation of the electrical components 30. The first heat dissipation member 50 can include a cover body 51 and a first fan 53. The cover body 51 can be provided as a hollow structure or a double-layered cover plate structure, so that the cover body 51 can have a certain space air duct cavity 511 inside. The air inlet end of the first fan 53 is communicated with the receiving cavity 11 in the cabinet 10, and the air outlet end of the first fan 53 is communicated with the air duct cavity 511. At the same time, the cover body 51 is provided with an exhaust port 5155 on the side facing the electrical components 30, which communicates the receiving cavity 11 and the air duct cavity 511. The first fan 53 can disturb the air in the receiving cavity 11 and drive the airflow to gather in the air duct cavity 511. At this time, the exhaust port 5155 of the cover body 51 can be arranged corresponding to the heating devices such as capacitors, inductors and relays of the electrical components 30, so that the cover body 51 can guide the heat dissipation airflow through the exhaust port 5155 to blow on the multiple heating devices of the electrical components 30 through the air duct cavity 511, effectively guaranteeing the stable heat dissipation of each device of the electrical components 30, realizing the directional ventilation and heat dissipation design in the power conversion device 100, effectively improving the heat dissipation efficiency and heat dissipation effect of the power conversion device 100, so that the power conversion device 100 can realize more stable and reliable operation.

[0042] The first fan 53 can continuously disturb the air in the accommodation cavity 11 to make the air flow circulate in the accommodation cavity 11, the first fan 53 and the air duct cavity 511. At this time, the heat generated by the electrical component 30 can be taken away by the air flow flowing towards the electrical component 30 through the air outlet 5155, and the heat can be transferred to the cover body 51 when the cooling air flow flows in the air duct cavity 511 of the cover body 51, and then released outward, so that the cooling air flow with low temperature can continuously flow in the case 10. Alternatively, a radiator 73 or a liquid cooling device can be arranged in the air duct cavity 511 to conduct heat and dissipate heat, so that the cover body 51 can better discharge the cooling air flow with low temperature through the air outlet 5155 to act on the electrical component 30 for heat dissipation, and the power conversion device 100 can have better heat dissipation effect. Of course, the first heat dissipation component 50 can also be cooled by other ways, and the cooling method of the first heat dissipation component 50 is not limited in the application, as long as the heat dissipation air flow can be cooled.

[0043] In one embodiment of the application, the first heat dissipation component 50 covers the first mounting port 13 of the case 10, so that the accommodation cavity 11 in the case 10 can be formed to accommodate the protective electrical component 30, and the influence of the external environment on the electrical component 30 is reduced. The air in the accommodation cavity 11 is gathered into the air duct cavity 511 by the first fan 53 of the first heat dissipation component 50, and then the cooling air flow is stably blown to the low-heat component of the electrical component 30 through the air outlet 5155 of the air duct cavity 511, so that the cooling air flow in the case 10 can stably act on each component of the electrical component 30 for heat dissipation, the power conversion device 100 can be fully cooled, the stable operation of the power conversion device 100 is ensured, and the heat dissipation efficiency of the power conversion device 100 is effectively improved.

[0044] In some embodiments, when the power conversion device 100 is provided with the second heat dissipation member 70, the electrical component 30 can be provided with components such as IGBT, reactor, etc. with high heat generation close to the second mounting port 15, and the second heat dissipation member 70 is in thermal conductive connection with the electrical component 30 at the second mounting port 15. The electrical component 30 can be in direct contact with the second heat dissipation member 70 for heat conduction, so that the heat generated by the electrical component 30 can be transferred to the second heat dissipation member 70 for heat dissipation. Alternatively, a heat conduction pad, heat conduction pipe or heat conduction silica gel or other heat conduction material can be arranged between the electrical component 30 and the second heat dissipation member 70, so that the heat generated by the electrical component 30 can be stably transferred to the second heat dissipation member 70 for heat dissipation. Of course, the second heat dissipation member 70 and the electrical component 30 can also be in thermal conductive connection in other ways, which are not limited in the present application, as long as the electrical component 30 can stably transfer heat to the second heat dissipation member 70 for heat dissipation. In addition, the second heat dissipation member 70 can be a liquid cooling plate, a heat sink 73 and a fan combination forced cooling assembly, etc. The structure of the second heat dissipation member 70 is not limited in the present application, as long as it can achieve good heat dissipation effect.

[0045] Referring to Figure 2 、 Figure 5 and Figure 10 In an embodiment of the present application, at least one flow guide protrusion 5157 is arranged on the side of the cover 51 facing the electrical component 30. The flow guide protrusion 5157 is hollow and communicates with the air duct cavity 511. The flow guide protrusion 5157 is provided with an air outlet 5155.

[0046] In the present embodiment, at least one flow guide protrusion 5157 is arranged on the side of the cover 51 facing the electrical component 30. The number of flow guide protrusions 5157 can correspond to the number of low heat generating devices of the electrical component 30, so that several flow guide protrusions 5157 can be arranged to correspond to several low heat generating devices of the electrical component 30, respectively. By arranging the air outlet 5155 on the flow guide protrusion 5157 and making the inner cavity of the flow guide protrusion 5157 communicate with the air duct cavity 511, the flow of cooling air in the air duct cavity 511 can be better guided and blown to the heat generating devices under the action of the flow guide protrusion 5157, so that each device of the electrical component 30 can be subjected to more concentrated cooling air flow, achieving better heat dissipation effect of the power conversion device 100.

[0047] The shape of the flow guide protrusion 5157 can be set to correspond to the shape of the heat generating device of the electrical component 30, and the size of the exhaust port can be set to correspond to the size of the heat generating device, so that the flow guide protrusion 5157 can more fully act on the heat dissipation airflow on the electrical component 30, reduce the heat dissipation blind area, and further improve the heat dissipation effect and practicability of the power conversion device 100. The flow guide protrusion 5157 and the cover body 51 can be integrally cast, or the flow guide protrusion 5157 can be welded on the cover body 51 by welding process, or the flow guide protrusion 5157 can be installed and fixed on the cover body 51 by using fasteners such as bolts and screws. The application does not limit the connection mode of the flow guide protrusion 5157 and the cover body 51, as long as the stable connection of the two can be realized.

[0048] Referring to Figure 7 In an embodiment of the application, the first heat dissipation member 50 further comprises a first heat dissipation fin 5131 connected to the cover body 51 and arranged in the air duct cavity 511.

[0049] In this embodiment, the first heat dissipation member 50 can include a plurality of first heat dissipation fins 5131 arranged in the air duct cavity 511. The air flow entering the air duct cavity 511 can be in contact with the first heat dissipation fins 5131 driven by the first fan 53, so that the temperature carried by the air flow can be conducted to the first heat dissipation fins 5131. The air duct cavity 511 can act on the electrical component 30 by the exhaust port 5155 to achieve better heat dissipation effect of the first heat dissipation member 50 on the power conversion device 100, and further improve the heat dissipation efficiency and practicability of the power conversion device 100.

[0050] The cover body 51 of the first heat dissipation member 50 can be made of heat conductive material, so that the first heat dissipation fins 5131 can transfer heat to the cover body 51, and the heat can be radiated outward to achieve heat dissipation. Alternatively, the first heat dissipation fins 5131 can be in heat conductive connection with the liquid cooling device or air cooling device outside the cover body 51, so that the first heat dissipation fins 5131 can transfer heat to the outside of the cover body 51 for heat dissipation. Of course, the first heat dissipation member 50 has many heat dissipation modes for the first heat dissipation fins 5131, and the application does not limit this, as long as the first heat dissipation fins 5131 can conduct heat to the air flow in the air duct cavity 511.

[0051] Referring to Figure 8 In an embodiment of the application, the first heat dissipation member 50 further comprises a second heat dissipation fin 5133 connected to the side of the cover body 51 opposite to the case 10.

[0052] In the embodiment, the first heat dissipation member 50 can also be provided with a plurality of second heat dissipation fins 5133 on the outer side of the cover 51 opposite to the cabinet 10. The airflow in the air duct cavity 511 can transfer heat to the second heat dissipation fins 5133, and the heat on the second heat dissipation fins 5133 can be taken away by the airflow in the environment where the power conversion device 100 is located, so as to realize stable heat conduction and dissipation of the first heat dissipation member 50 to the electrical component 30, realize more stable and reliable heat dissipation effect of the power conversion device 100, and further improve the heat dissipation efficiency and practicability of the power conversion device 100.

[0053] In the embodiment, the first heat dissipation member 50 can also be provided with a plurality of second heat dissipation fins 5133 on the outer side of the cover 51 opposite to the cabinet 10. The airflow in the air duct cavity 511 can transfer heat to the second heat dissipation fins 5133, and the heat on the second heat dissipation fins 5133 can be taken away by the airflow in the environment where the power conversion device 100 is located, so as to realize stable heat conduction and dissipation of the first heat dissipation member 50 to the electrical component 30, realize more stable and reliable heat dissipation effect of the power conversion device 100, and further improve the heat dissipation efficiency and practicability of the power conversion device 100.

[0054] Referring to Figure 9 In an embodiment of the present application, the first heat dissipation member 50 further comprises a first liquid cooling plate 55, and the first liquid cooling plate 55 is arranged in the air duct cavity 511.

[0055] In the embodiment, the first heat dissipation member 50 can also be provided with a plurality of second heat dissipation fins 5133 on the outer side of the cover 51 opposite to the cabinet 10. The airflow in the air duct cavity 511 can transfer heat to the second heat dissipation fins 5133, and the heat on the second heat dissipation fins 5133 can be taken away by the airflow in the environment where the power conversion device 100 is located, so as to realize stable heat conduction and dissipation of the first heat dissipation member 50 to the electrical component 30, realize more stable and reliable heat dissipation effect of the power conversion device 100, and further improve the heat dissipation efficiency and practicability of the power conversion device 100.

[0056] The first liquid cooling plate 55 can include an outer plate with high thermal conductivity and a liquid flow pipe arranged inside the outer plate and in thermal contact with the outer plate. By continuously flowing a high-thermal-conductivity liquid in the liquid flow pipe, the liquid can continuously carry away the heat of the outer plate, so that the first liquid cooling plate 55 can achieve high thermal conductivity and heat dissipation. Of course, the first liquid cooling plate 55 can also be provided with an outer plate with good sealing effect. By continuously flowing the liquid into and out of the outer plate to carry away the heat of the outer plate, the first liquid cooling plate 55 can achieve thermal conductivity and heat dissipation. The structure of the first liquid cooling plate 55 has many forms, and the present application does not limit it. The heat of the first liquid cooling plate 55 can be stably carried away by the liquid.

[0057] In addition, the cover 51 can also be provided with two pipes connected with the liquid inlet and outlet of the first liquid cooling plate 55, so that the cooling liquid circulation system outside the power conversion device 100 can better supply cooling liquid to the first liquid cooling plate 55, and return the liquid carrying heat in the first liquid cooling plate 55, to ensure the stable heat dissipation operation of the first liquid cooling plate 55. When the second heat dissipation member 70 is a liquid cooling plate, the liquid supply pipe and the liquid discharge pipe of the second heat dissipation member 70 can be connected in parallel with the liquid supply pipe and the liquid discharge pipe of the first liquid cooling plate 55, so that the power conversion device 100 can use one set of cooling liquid circulation system to supply cooling liquid to the first heat dissipation member 50 and the second heat dissipation member 70, and better ensure the stable operation of the power conversion device 100.

[0058] Referring to Figure 9 In an embodiment of the present application, the first heat dissipation member 50 further includes a third heat dissipation fin 551 connected to the outer side of the first liquid cooling plate 55.

[0059] In the present embodiment, the first heat dissipation member 50 can be provided with a third heat dissipation fin 551 on the outer side of the first liquid cooling plate 55, which can more quickly conduct the heat in the air duct cavity 511 to the first liquid cooling plate 55, thereby better improving the thermal conductivity and heat dissipation efficiency of the first heat dissipation member 50 and further improving the heat dissipation effect and practicability of the power conversion device 100. The first heat dissipation member 50 can be arranged with a plurality of third heat dissipation fins 551 around the first liquid cooling plate 55, so as to achieve faster thermal conductivity by using more third heat dissipation fins 551.

[0060] In addition, the first heat dissipation member 50 can be provided with the first liquid cooling plate 55 corresponding to the outlet end of the first fan 53, and the third heat dissipation fin 551 can be arranged on the surface of the first liquid cooling plate 55 facing the first fan 53, so that the airflow blown into the air duct cavity 511 by the first fan 53 can more quickly act on the third heat dissipation fin 551 and the first liquid cooling plate 55, thereby further improving the heat dissipation effect and practicability of the power conversion device 100.

[0061] Referring to Figure 6 , Figure 7 and Figure 9 , in one embodiment of the present application, the side of the cover 51 facing the electrical component 30 is provided with an air inlet 5153 communicating with the air duct cavity 511, and the first fan 53 is connected to the side of the cover 51 facing the electrical component 30, and the air outlet end cover of the first fan 53 covers the air inlet 5153.

[0062] In this embodiment, the first fan 53 can be mounted on the side of the cover 51 facing the electrical component 30, so that the first fan 53 can be accommodated in the receiving cavity 11. Compared with the way of arranging the first fan 53 in the air duct cavity 511, the structural thickness of the cover 51 can be reduced, and the miniaturization design of the power conversion device 100 can be better realized, and the structural stability and reliability of the power conversion device 100 can be further improved.

[0063] At this time, by arranging the air inlet 5153 communicating with the air duct cavity 511 on the side of the cover 51 facing the electrical component 30, and covering the air inlet 5153 with the air inlet end cover of the first fan 53, the airflow disturbed by the first fan 53 can be gathered from the air outlet end of the first fan 53 and flow into the air duct cavity 511 through the air inlet 5153, effectively reducing the leakage of the heat dissipation airflow between the first fan 53 and the cover 51, realizing the sufficient heat conduction and dissipation of the airflow by the first heat dissipation component 50, guaranteeing better heat dissipation effect of the power conversion device 100, and further improving the practicality and structural reliability of the power conversion device 100.

[0064] Referring to Figure 9 and Figure 10 , in one embodiment of the present application, the cover 51 comprises a surrounding plate 5151 connected to the side of the cover 51 facing the electrical component 30 and arranged around the air inlet 5153, and the surrounding plate 5151 surrounds the peripheral side of the first fan 53.

[0065] In the embodiment, the cover plate can be provided with a surrounding plate 5151 surrounding the air inlet 5153 on the side facing the electrical component 30, and the surrounding plate 5151 can form a receiving groove structure with the plate surface of the cover plate, so that the first fan 53 can be accommodated in the receiving groove, and the outer periphery of the first fan 53 is surrounded by the cover plate. Under the action of the surrounding plate 5151, the converging effect of the disturbed airflow of the first fan 53 can be better achieved, so that the first fan 53 can more concentratedly guide the airflow into the air duct cavity 511 through the air inlet 5153, thereby realizing better heat dissipation airflow circulation of the first heat dissipation component 50, so that the airflow for heat conduction of the electrical component 30 in the accommodation cavity 11 can be more stably and fully flowed into the air duct cavity 511 for heat dissipation under the action of the first fan 53, and better heat dissipation effect of the power conversion device 100 is realized, and the practicability and structural reliability of the power conversion device 100 are further improved.

[0066] Referring to Figures 5 to 10 In an embodiment of the present application, the cover body 51 includes an upper cover plate 513 and an air duct plate 515. The upper cover plate 513 is connected to the cabinet 10 and covers the first mounting port 13. The air duct plate 515 is connected to the side of the upper cover plate 513 facing the electrical component 30 and forms the air duct cavity 511 together with the upper cover plate 513. The air duct plate 515 is provided with an air outlet 5155.

[0067] In the embodiment, by making the cover body 51 include the upper cover plate 513 and the air duct plate 515, the upper cover plate 513 with a larger size can be used to cover the first mounting port 13 of the cabinet 10, and the air duct plate 515 is connected to the plate surface of the upper cover plate 513 facing the electrical component 30, so that the air duct plate 515 and the upper cover plate 513 can be connected to form the air duct cavity 511. The air outlet 5155 can be arranged on the side of the air duct plate 515 facing away from the upper cover plate 513, so that the cover body 51 can stably blow the airflow in the air duct cavity 511 to the electrical component 30 through the air outlet 5155. By connecting the upper cover plate 513 and the air duct plate 515 to form the air duct cavity 511, the production and installation difficulty of the cover body 51 can be better reduced, and the production cost of the cover body 51 can be reduced. At the same time, it is convenient to disassemble and assemble the upper cover plate 513 and the air duct plate 515 to clean or maintain the air duct cavity 511, reduce the dust accumulation in the airflow converging air duct, and further improve the practicability and structural reliability of the power conversion device 100.

[0068] Referring to Figure 1 and Figure 2 In an embodiment of the present application, the second heat dissipation component 70 is a second liquid cooling plate 70a, the second liquid cooling plate 70a covers the second mounting port 15, and the second liquid cooling plate 70a is in heat conduction connection with the electrical component 30.

[0069] In the embodiment, the second heat dissipation member 70 can adopt the structure of the second liquid cooling plate 70a, and the plate surface of the second liquid cooling plate 70a can be connected to the upper cover of the cabinet 10 to cover the second mounting port 15. At this time, the electrical component 30 can abut against the plate surface of the second liquid cooling plate 70a through the second mounting port 15 to conduct heat, or can be in contact with the plate surface of the second liquid cooling plate 70a through a heat-conducting silicone grease, a heat-conducting gasket, or a heat-conducting pipe to conduct heat. In this way, the high heat generated by the electrical component 30 can be conducted to the second liquid cooling plate 70a for rapid heat dissipation, so that the power conversion device 100 can have better heat dissipation effect, and the heat dissipation efficiency and practicability of the power conversion device 100 can be further improved.

[0070] The second liquid cooling plate 70a can include an outer plate member with high heat conduction performance and a liquid flow pipe arranged inside the outer plate member and in heat-conducting connection with the outer plate member. By continuously flowing the heat-conducting fluid with high heat conduction effect in the liquid flow pipe, the heat-conducting fluid can continuously take away the heat of the outer plate member, so that the second liquid cooling plate 70a can have high heat conduction and heat dissipation effect. Of course, the second liquid cooling plate 70a can also be provided with an outer plate member with good sealing effect. By continuously flowing the heat-conducting fluid into and out of the outer plate member to take away the heat of the outer plate member, the heat conduction and heat dissipation effect of the second liquid cooling plate 70a can be achieved. The structure of the second liquid cooling plate 70a can be various, and the present application does not limit it. As long as the heat-conducting fluid can stably take away the heat of the second liquid cooling plate 70a, it is acceptable.

[0071] In addition, the second heat dissipation member 70 can also be provided with two pipes connected to the liquid inlet and liquid outlet of the second liquid cooling plate 70a, so that the cooling liquid circulating system outside the power conversion device 100 can better supply cooling liquid to the second liquid cooling plate 70a, and return the liquid carrying heat in the second liquid cooling plate 70a, so as to ensure the stable heat dissipation operation of the second liquid cooling plate 70a. When the first heat dissipation member 50 also includes the first liquid cooling plate 55, the liquid supply pipe and the liquid discharge pipe of the second liquid cooling plate 70a can be connected in parallel with the liquid supply pipe and the liquid discharge pipe of the first liquid cooling plate 55, so that the power conversion device 100 can use one set of cooling liquid circulating system to supply cooling liquid to the first heat dissipation member 50 and the second heat dissipation member 70, and better ensure the stable operation of the power conversion device 100.

[0072] Referring to Figures 11 to 13In an embodiment of the present application, the second heat-dissipating member 70 comprises a converging shell 71, a heat-dissipating device 73 and a second fan 75, the converging shell 71 is connected with the cabinet 10 and covers the second installation opening 15, the converging shell 71 is provided with a ventilation cavity 711 which penetrates through two sides of the converging shell 71; the heat-dissipating device 73 is arranged in the converging shell 71 and is in heat-conducting connection with the electrical member 30, the heat-dissipating device 73 comprises fourth heat-dissipating fins which are arranged in the ventilation cavity 711; the second fan 75 is connected with the converging shell 71 and is arranged at one end of the ventilation cavity 711, the second fan 75 blows air towards the ventilation cavity 711.

[0073] In the embodiment, the second heat-dissipating member 70 can also connect the converging shell 71 with the cabinet 10 and cover the second installation opening 15 with a side wall of the converging shell 71, at this time, the heat-dissipating device 73 can be arranged on the side wall of the converging shell 71, so that the devices with large heat generation on the electrical member 30 can be in abutment and heat conduction with the heat-dissipating device 73 through the second installation opening 15, or can be in contact and heat conduction with the heat-dissipating device 73 by using heat-conducting silicone grease, heat-conducting gasket or heat-conducting pipe, so that the high heat generated by the electrical member 30 can be stably conducted to the heat-dissipating device 73. By arranging the fourth heat-dissipating fins of the heat-dissipating device 73 in the ventilation cavity 711 of the converging shell 71 and arranging the second fan 75 to disturb the airflow to flow through the ventilation cavity 711, the second fan 75 can drive the airflow to take away the heat on the fourth heat-dissipating fins in the ventilation cavity 711, that is, the heat generated by the electrical member 30 can be conducted to the fourth heat-dissipating fins through the heat-dissipating device 73 and taken away by the airflow flowing in the ventilation cavity 711, so as to realize the stable heat dissipation of the second heat-dissipating member 70 to the electrical member 30, which is conducive to taking away the heat generated by the electrical member 30 more quickly by using the forced air cooling heat dissipation mode of the second heat-dissipating member 70, and further improves the heat dissipation effect and efficiency of the power conversion device 100.

[0074] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A power conversion device, characterized by, The utility model relates to a power conversion device, including: A cabinet is internally provided with a receiving cavity, and the cabinet is provided with a first installation opening communicating with the receiving cavity; An electrical component is arranged in the receiving cavity; A first heat dissipation component includes a cover and a first fan, the cover covers the first installation opening, the cover is internally provided with an air duct cavity, the cover is provided with an exhaust opening communicating with the receiving cavity and the air duct cavity, the exhaust opening is arranged towards the electrical component, the air inlet end of the first fan communicates with the receiving cavity, and the air outlet end of the first fan communicates with the air duct cavity.

2. The power conversion device of claim 1, wherein, At least one flow guide protrusion is arranged on the side of the cover facing the electrical component, the flow guide protrusion is hollow and communicates with the air duct cavity, and the flow guide protrusion is provided with the exhaust opening.

3. The power conversion device of claim 1, wherein, The first heat dissipation component further includes first heat dissipation fins connected to the cover and arranged in the air duct cavity.

4. The power conversion device of claim 1, wherein, The first heat dissipation component further includes second heat dissipation fins connected to the side of the cover opposite to the cabinet.

5. The power conversion device of claim 1, wherein, The first heat dissipation component further includes a first liquid cooling plate arranged in the air duct cavity.

6. The power conversion device of claim 5, wherein, The first heat dissipation component further includes third heat dissipation fins connected to the outer side of the first liquid cooling plate.

7. The power conversion device of any one of claims 1 to 6, wherein, The side of the cover facing the electrical component is provided with an air inlet opening communicating with the air duct cavity, the first fan is connected to the side of the cover facing the electrical component, and the air outlet end of the first fan covers the air inlet opening.

8. The power conversion device of claim 7, wherein, The cover includes a surrounding plate connected to the side of the cover facing the electrical component and arranged around the air inlet opening, and the surrounding plate surrounds the circumferential side of the first fan.

9. The power conversion device of any one of claims 1 to 6, wherein, The cover includes: An upper cover plate connected to the cabinet and covering the first installation opening; An air duct plate connected to the side of the upper cover plate facing the electrical component and surrounding the upper cover plate to form the air duct cavity, and the air duct plate is provided with the exhaust opening.

10. The power conversion device of any one of claims 1 to 6, wherein the cabinet is further provided with a second installation opening communicating with the receiving cavity, the first installation opening and the second installation opening are oppositely arranged, and the power conversion device further includes a second heat dissipation component covering the second installation opening and being in heat conduction connection with the electrical component.

11. The power conversion device of claim 10, wherein, The second heat dissipation component is a second liquid cooling plate covering the second installation opening, and the second liquid cooling plate is in heat conduction connection with the electrical component.

12. The power conversion device of claim 10, wherein, The second heat dissipation component includes: A current collection shell connected with the cabinet and covering the second installation opening, the current collection shell is provided with a ventilation cavity penetrating through both sides of the current collection shell; A heat sink arranged in the current collection shell and being in heat conduction connection with the electrical component, the heat sink includes fourth heat dissipation fins arranged in the ventilation cavity; A second fan connected to the current collection shell and arranged in the ventilation cavity.

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