Air-cooled energy storage converter and converter unit

Abstract

The invention provides an air-cooled energy storage converter and a converter unit. According to the air-cooled energy storage converter and the converter unit provided by the invention, on one hand, the flow direction of air can be controlled by optimizing the structural layout and the air duct structure, so that the smoothness of air flow and the high efficiency of cooling can be ensured, heat dissipation can be performed in a targeted manner, and the cooling efficiency can be improved under the condition that a fan is arranged in the converter unit; the air flows according to a set route, so that the purpose of heat dissipation is achieved, and the problem of an external fan or a plurality of internal fans is avoided; on the second aspect, different functional modules are installed at different positions, and heat dissipation paths of the power module and the reactor are separated, so that mutual interference of heat between different modules can be avoided, it is ensured that the heat cannot be gathered in the cabinet body, the overall heat dissipation efficiency can be improved, and the service life of the cabinet body is prolonged. And the special design of the air duct facilitates the disassembly and assembly of the air duct and the internal module, reduces the influence on the whole converter caused by the fault of a single module, and can improve the convenience of maintenance.

Description

Technical Field

[0001] The present application relates to the technical field of converters, and in particular to an air-cooled energy storage converter and a converter unit. Background Art

[0002] As the core component of the energy storage system, the performance and efficiency of the energy storage inverter determine the grid-connected performance of the energy storage system and are related to the reliable and stable operation of the energy storage system.

[0003] In order to improve the heat dissipation efficiency, the current air-cooled energy storage inverter generally has an external fan or multiple fans built in. When the fan is external, it is easily affected by the weather and environment, which reduces the service life of the air-cooled inverter. In addition, when the fan is external, the external size of the cabinet will increase, increasing the risk of damage during transportation and installation. When multiple fans are built in, any failure will cause the cooling system of the entire machine to fail to work normally, thereby causing the inverter to fail to operate due to excessive temperature, increasing the failure rate. Summary of the invention

[0004] In view of this, the present application provides an air-cooled energy storage inverter and inverter unit, which is used to achieve the purpose of efficient heat dissipation by optimizing the internal structure layout and air duct structure while having one built-in fan, so as to avoid the problems caused by an external fan or multiple built-in fans.

[0005] Specifically, the present application is implemented through the following technical solutions: The first aspect of the present application provides an air-cooled energy storage converter, which includes a sealed cabinet, a reactor, a power module, a fan, a control module and an air duct assembly; wherein: The inner cavity of the sealed cabinet is divided into a first cavity and a second cavity by a vertical partition; the first cavity is divided into a first upper installation chamber and a first lower installation chamber by a transverse partition; the second cavity is divided into a second upper installation chamber and a second lower installation chamber by a transverse partition; the first upper installation chamber, the first lower installation chamber, the second upper installation chamber and the second lower installation chamber are sealed and isolated; the first lower installation chamber and the second lower installation chamber are provided with an external air inlet; the first upper installation chamber and the second upper installation chamber are provided with an external air outlet; The control module is installed in the first lower installation chamber; the fan is installed in the second upper installation chamber; the reactor and the power module are installed in the second lower installation chamber, and the power module is located above the reactor; The air duct assembly includes a mixing air duct, and a first dedicated air duct and a second dedicated air duct respectively connected to the mixing air duct; the mixing air duct is arranged behind the power module, and the air outlet of the mixing air duct is connected to the air inlet of the fan; The reactor is sleeved with a first air guide cover, and the air outlet of the first air guide cover is connected with the air inlet of the first dedicated air duct, so that the air is introduced from the lower part of the reactor into the first dedicated air duct through the first air guide cover, and then discharged from the sealed cabinet after passing through the mixing air duct and the fan; The second dedicated air duct is in communication with the heat dissipation air duct of the power module, so that the air entering the power module enters the mixing air duct after passing through the heat dissipation air duct and the second dedicated air duct, and is discharged from the sealed cabinet after passing through the mixing air duct and the fan; The mixing air duct has a first side air inlet and a second side air inlet, the first side air inlet is connected to the first lower installation chamber, and the second side air inlet is connected to the second lower installation chamber, so that the wind entering the first lower installation chamber and the second lower installation chamber enters the mixing air duct through the side air inlet, and is discharged from the sealed cabinet after passing through the mixing air duct and the fan.

[0006] Optionally, the air intake volume of the first side air inlet is adjustable; and / or, The air inlet volume of the second side air inlet is adjustable; and / or, The air inlet volume of the first dedicated air duct is adjustable.

[0007] Optionally, the mixing air duct is an L-shaped air duct; wherein, The L-shaped air duct is composed of a vertical air duct and a horizontal air duct that are interconnected; the lower port of the vertical air duct is connected to the air outlet of the first dedicated air duct; an air inlet is provided at a position where the vertical air duct is directly opposite to the heat dissipation air duct, and the second dedicated air duct is connected to the air outlet of the heat dissipation air duct and the air inlet; The transverse air duct is a groove-like air duct, and the horizontal air outlet of the groove-like air duct is connected to the air inlet of the fan; the first side air inlet is arranged on the first side of the groove-like air duct facing the first lower installation chamber, and the second side air inlet is arranged on the second side of the groove-like air duct facing the second lower installation chamber.

[0008] Optionally, the first dedicated air duct is composed of a cover-shaped air duct and a vertical air duct that are interconnected; the air inlet of the cover-shaped air duct is sealed and connected to the air outlet of the first air guide cover; and the air outlet of the vertical air duct is connected to the mixing air duct.

[0009] Optionally, an air volume regulating valve is provided on the first side air inlet, the second side air inlet and / or the first dedicated air duct to adjust the air intake volume through the air volume regulating valve.

[0010] Optionally, the air-cooled energy storage inverter further includes a backup power supply module, and the backup power supply module is installed in the first upper installation chamber.

[0011] Optionally, two external air inlets are provided on the front door panels of the first lower installation chamber and the second upper installation chamber.

[0012] Optionally, an external air outlet is provided on the front door panel and the back panel of the first upper installation chamber and the second upper installation chamber.

[0013] Optionally, a sealing cover is provided on the fan; a side of the sealing cover facing the front door panel and a side of the sealing cover facing the back panel are hollow structures.

[0014] A second aspect of the present application provides a converter unit, comprising at least two sets of air-cooled energy storage converters as provided in the first aspect of the present application.

[0015] The air-cooled energy storage inverter and inverter unit provided by the present application, on the one hand, can control the direction of wind flow by optimizing the structural layout and the air duct structure, so that the smoothness of air flow and the high efficiency of cooling can be ensured, and the heat dissipation can be carried out in a targeted manner, and it can be ensured that when a fan is built in, the wind flows along the set route to achieve the purpose of heat dissipation, so that the problems existing in external fans and multiple built-in fans can be avoided; on the second hand, by installing different functional modules in different positions and separating the heat dissipation paths of the power module and the reactor, it is possible to avoid mutual interference between the heat of different modules, ensure that the heat will not accumulate inside the cabinet, and improve the overall heat dissipation efficiency; on the third hand, the air-cooled energy storage inverter provided by the present application, each module is independent of each other, and can be independently disassembled and maintained, reducing the impact of a single module failure on the entire inverter, and can improve the convenience of maintenance.

[0016] In addition, the air-cooled energy storage inverter provided in the present application can control the air volume by making the air inlet volume of the first side air inlet adjustable, the air inlet volume of the second side air inlet adjustable, and the air inlet volume of the first dedicated air duct adjustable. In this way, by adjusting the air inlet volume, the air volume can be distributed to control the temperature rise of each area, so that the temperature rise of each area is maintained within the design range to avoid uneven heat dissipation, achieve heat dissipation balance, and further avoid the problem of component damage due to uneven heat dissipation, which can reduce component damage and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of an air-cooled energy storage converter provided for implementation of the present application; Figure 2 A right view of the air-cooled energy storage converter provided in Example 1 of the present application; Figure 3 A left view of the air-cooled energy storage converter provided in Example 1 of the present application; Figure 4 This is an external schematic diagram of the air-cooled energy storage converter provided in Example 1 of the present application; Figure 5 A schematic diagram of a mixing air duct shown as an exemplary embodiment of the present application; Figure 6 A schematic diagram of a power module shown as an exemplary embodiment of the present application; Figure 7 This is a diagram showing the coordination relationship between the reactor and the first dedicated air duct according to an exemplary embodiment of the present application.

[0018] Description of reference numerals: 1: Sealed cabinet; 2: Reactor; 3: Power module; 4: Fan; 5: Control module; 6: Air duct components; 7: The first air guide cover; 8: Backup power module; 11: first cavity; 12: Second cavity; 13: External air inlet; 14: External air outlet; 111: first upper installation chamber; 112: first lower installation chamber; 121: second upper installation chamber; 122: second lower installation chamber; 31: heat dissipation duct; 61: Mixing air duct; 62: first dedicated air duct; 63: second dedicated air duct; 611: first side air inlet; 612: Second side air inlet; 613: air inlet; 614: Horizontal air outlet. DETAILED DESCRIPTION

[0019] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0020] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0021] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0022] As the core component of the energy storage system, the performance and efficiency of the energy storage inverter determine the grid-connected performance of the energy storage system and are related to the reliable and stable operation of the energy storage system. The air-cooled energy storage inverter is compact, generates a lot of heat, and runs for a long time, which reduces the life of the components and affects the overall efficiency and life of the equipment. Therefore, while meeting various requirements, the air-cooled inverter is optimized to effectively improve the high temperature problem in the operation of the inverter. Ensuring the long-term stable operation of the energy storage inverter has become a hot topic in current research.

[0023] In order to meet the heat dissipation requirements of components in power cabinets, grid-connected cabinets and other cabinets, existing air-cooled energy storage converters generally have external fans or multiple built-in fans. When the fan is external, the fan is arranged outside the cabinet and is affected by the environment, which makes it easy to break and reduce its service life. In addition, when the fan is external, the external size of the cabinet increases, which is not only unsightly, but also increases the risk of damage during transportation and installation. Furthermore, when multiple fans are built in, on the one hand, multiple fans increase the cost. On the second hand, multiple fans need to be equipped with a multi-duct design, which increases redundant margin and reduces the utilization efficiency of the fans. On the third hand, if any fan fails, the cooling system of the whole machine cannot work normally, which causes the inverter temperature to be too high and cannot operate, increasing the failure rate. Fourthly, when multiple fans are built in, the fan is arranged inside the cabinet. Since the power module and the air duct need to be sealed, the power module needs to be disassembled and installed when maintaining the power module, and even the air duct needs to be disassembled, which not only makes maintenance difficult, but also prone to air leakage. In addition, when multiple fans are built in, the placement of components affects each other, and the heat dissipation of the heat-generating components affects each other, and the overall heat dissipation effect is poor.

[0024] In view of this, the present application provides an air-cooled energy storage inverter and inverter unit, which is used to achieve the purpose of efficient heat dissipation by optimizing the internal structure layout and air duct structure while having one built-in fan, so as to avoid the problems caused by an external fan or multiple built-in fans.

[0025] Specific embodiments are given below to introduce the technical solution of the present application in detail.

[0026] Figure 1 A front view of an air-cooled energy storage converter provided for implementation of this application, Figure 2 This is a right side view of the air-cooled energy storage converter provided in Example 1 of the present application. Figure 3 This is a left view of the air-cooled energy storage converter provided in Example 1 of the present application. Figure 4 This is an external schematic diagram of the air-cooled energy storage converter provided in Example 1 of the present application (wherein, Figure 4 Figure A is the external front view. Figure 4 Figure B is the external rear view). Figure 5 This is a schematic diagram of a mixing air duct according to an exemplary embodiment of the present application. Figures 1 to 5 The air-cooled energy storage converter provided in this embodiment includes a sealed cabinet 1, a reactor 2, a power module 3, a fan 4, a control module 5 and an air duct component 6; wherein, The inner cavity of the sealed cabinet 1 is divided into a first cavity 11 and a second cavity 12 by a vertical partition; the first cavity 11 is divided into a first upper installation chamber 111 and a first lower installation chamber 112 by a transverse partition; the second cavity 12 is divided into a second upper installation chamber 121 and a second lower installation chamber 122 by a transverse partition; the first upper installation chamber 111, the first lower installation chamber 112, the second upper installation chamber 121 and the second lower installation chamber 122 are sealed and isolated; the first lower installation chamber 112 and the second lower installation chamber 122 are provided with an external air inlet 13; the first upper installation chamber 111 and the second upper installation chamber 121 are provided with an external air outlet 14; The control module 5 is installed in the first lower installation chamber 112; the fan 4 is installed in the second upper installation chamber 121; the reactor 2 and the power module 3 are installed in the second lower installation chamber 122, and the power module 3 is located above the reactor 2; The air duct assembly 6 includes a mixing air duct 61, and a first dedicated air duct 62 and a second dedicated air duct 63 respectively connected to the mixing air duct 61; the mixing air duct 61 is arranged behind the power module 3, and the air outlet of the mixing air duct 61 is connected to the air inlet of the fan 4; The reactor 2 is sleeved with a first air guide cover 7, and the air outlet of the first air guide cover 7 is connected with the air inlet of the first dedicated air duct 62, so that the air is introduced from the lower part of the reactor 2 into the first dedicated air duct 62 through the first air guide cover 7, and then discharged from the sealed cabinet 1 after passing through the mixing air duct 61 and the fan 4; The second dedicated air duct 63 is connected to the heat dissipation air duct of the power module 3, so that the air entering the power module 3 enters the mixing air duct 61 after passing through the heat dissipation air duct and the second dedicated air duct 63, and is discharged from the sealed cabinet 1 after passing through the mixing air duct 61 and the fan 4; The mixing air duct 61 has a first side air inlet 611 and a second side air inlet 612, the first side air inlet 611 is connected to the first lower installation chamber 112, and the second side air inlet 612 is connected to the second lower installation chamber 122, so that the wind entering the first lower installation chamber 112 and the second lower installation chamber 122 enters the mixing air duct 61 through the side air inlet, and is discharged from the sealed cabinet 1 after passing through the mixing air duct 61 and the fan 4.

[0027] For details, please refer to Figure 4 The sealed cabinet 1 is a sealed structure, which is used to prevent dust, oil and water vapor from entering the interior of the energy storage inverter cabinet, thereby extending the service life of the air-cooled energy storage inverter and reducing the maintenance cost of the air-cooled energy storage inverter.

[0028] It is understandable that the sealed cabinet 1 may include an external shell and a frame supporting the external shell, and the external shell may be a rectangular parallelepiped structure surrounded by six rectangular plates. Further, the inner cavity of the sealed cabinet 1 is divided into four parts by vertical partitions and horizontal partitions, namely, a first upper installation chamber 111, a first lower installation chamber 112, a second upper installation chamber 121, and a second lower installation chamber 122, and each installation chamber is sealed and isolated.

[0029] Specifically, the vertical partition may be a rectangular plate, which is placed vertically, and whose length is the same as the height of the sealed cabinet 1, and whose width is the same as the width of the sealed cabinet 1 (it should be noted that the vertical partition may be a rectangular plate, which is placed vertically, and whose length is the same as the height of the sealed cabinet 1, and whose width is the same as the width of the sealed cabinet 1). Figure 1The length in the front-to-back direction is the width of the sealed cabinet 1, the length in the left-to-right direction is the length of the sealed cabinet 1, and the length in the up-down direction is the height of the sealed cabinet). It divides the inner cavity into two left and right installation chambers. For the convenience of explanation, the installation chamber on the left is recorded as the first cavity 11, and the installation chamber on the right is recorded as the second cavity 12. Furthermore, the transverse partition is also a rectangular plate, which is placed horizontally. Its length is the same as the length of the sealed cabinet 1, and its width is the width of the sealed cabinet 1. It divides the first cavity 11 and the second cavity 12 into two upper and lower installation chambers. For the convenience of explanation, the upper installation chamber is recorded as the upper installation chamber, and the upper installation chamber is recorded as the lower installation chamber. It should be noted that the four surfaces of the vertical partition and the transverse partition can be in close contact with the inner cavity surface of the sealed cabinet 1 to achieve a sealing effect.

[0030] Optional, see Figure 4 In a possible implementation, two external air inlets 13 are disposed on the front door panels of the first lower installation chamber 112 and the second upper installation chamber 121. An external air outlet 14 is disposed on the front door panels and back panels of the first upper installation chamber 111 and the second upper installation chamber 121.

[0031] Specifically, the specific morphology of the external air inlet 13 and the external air outlet 14 is set according to actual needs, and is not limited in this embodiment. For example, in one embodiment, the external air inlet 13 and the external air outlet 14 are both grille-shaped air outlets; for another example, in another embodiment, the external air inlet 13 and the external air outlet 14 can also be grid-shaped air outlets.

[0032] For details, please continue to refer to Figures 1 to 3 , the control module 5 is installed in the first lower installation chamber 112, the fan 4 is installed in the second upper installation chamber 121, and the reactor 2 and the power module 3 are installed in the second lower installation chamber 122 in order from bottom to top. In addition, please refer to Figure 2 It can be understood that the reactor 2 is installed behind the power module 3, that is, the reactor 2 is installed at a position close to the back plate, and the power module 3 is installed at a position close to the front door plate.

[0033] It should be noted that, in a possible implementation, the control module 5 may be a revolving door structure, which can be rotated 90° to facilitate maintenance of other modules behind the control module 5. Figure 3 In a possible implementation, a DC pre-charging component may be installed behind the control module 5; further, a circuit breaker may be installed behind the DC pre-charging component.

[0034] Please refer to Figure 1Optionally, in a possible implementation, a sealing cover is provided on the fan 4; a side of the sealing cover facing the front door panel and a side of the sealing cover facing the back panel are hollow structures.

[0035] Specifically, a sealing cover is set on the fan 4. On the one hand, it can play a certain protective role on the fan 4 and extend the service life of the fan 4. On the other hand, the sealing cover can limit the flow direction of the wind and make the wind flow out in the set direction. For example, in this example, the side of the sealing cover facing the front door panel and the side facing the back panel are set as hollow structures, and air outlets are set at corresponding positions behind the front door panel and at the back panel. In this way, the normal air outlet of the fan 4 can be guaranteed, the air outlet of the fan 4 is smoother, and the heat dissipation effect and working efficiency of the fan 4 are guaranteed.

[0036] The air duct structure of the air-cooled energy storage converter provided in this embodiment is introduced below: Specifically, Figure 6 This is a schematic diagram of a power module according to an exemplary embodiment of the present application. Figure 6 Figure A is a schematic diagram of the power module at a certain angle. Figure 6 Figure B is a schematic diagram of the power module from another angle. Please also refer to Figure 2 and reference Figure 6 The power module 3 has a heat dissipation air duct 31 , and cold air enters the heat dissipation air duct 31 through the lower end of the power module 3 and flows from the heat dissipation air duct 31 to the second dedicated air duct 63 .

[0037] For details, please refer to Figure 6 It can be understood that the power module 3 includes a heat sink and an IGBT, wherein the heat sink has a heat dissipation duct 31, and the IGBT is located in front of the heat dissipation duct 31. Further, the heat dissipation duct 31 is vertically arranged and connected to the second dedicated duct 63.

[0038] For further information, please also refer to Figure 2 , Figure 5 and Figure 6 Optionally, in a possible implementation, the mixing air duct 61 is an L-shaped air duct; wherein, The L-shaped air duct is composed of a vertical air duct and a horizontal air duct that are interconnected; the lower end of the vertical air duct is connected to the air outlet of the first dedicated air duct 62; an air inlet 613 is provided at a position where the vertical air duct is directly opposite to the heat dissipation air duct 31, and the second dedicated air duct 63 is connected to the air outlet of the heat dissipation air duct 31 and the air inlet 613; The transverse air duct is a groove-like air duct, and the horizontal air outlet 614 of the groove-like air duct is connected to the air inlet of the fan 4; the first side air inlet 611 is arranged on the first side of the groove-like air duct facing the first lower installation chamber 112, and the second side air inlet 612 is arranged on the second side of the groove-like air duct facing the second lower installation chamber 122.

[0039] For details, please refer to Figure 2 and Figure 5 The mixing air duct 61 is an L-shaped air duct, which is composed of a vertical air duct and a transverse air duct that are interconnected. The lower port of the vertical air duct constitutes the air inlet of the mixing air duct 61, which is used to connect the mixing air duct 61 with the first dedicated air duct 62; the upper port of the transverse air duct constitutes the horizontal air outlet 614 of the mixing air duct 61, which is used to connect the mixing air duct 61 with the air inlet of the fan 4.

[0040] For further information, please also refer to Figure 2 , Figure 5 and Figure 6 An air inlet 613 matching the heat dissipation duct 31 is arranged at a position where the vertical air duct of the mixing air duct 61 is directly opposite to the heat dissipation duct 31 of the power module 3, and a second dedicated air duct 63 is arranged between the air inlet 613 and the heat dissipation duct 31 to connect the air outlet of the heat dissipation duct 31 with the air inlet 613 of the vertical air duct.

[0041] It is understandable that the second dedicated air duct 63 may be a hollow columnar body, and its cross section may be circular or rectangular, which is not limited in this embodiment. The air inlet of the second dedicated air duct 63 is provided with a mounting portion connected to the air outlet of the heat dissipation air duct 31, and the air outlet of the second dedicated air duct 63 is provided with a mounting portion connected to the air inlet 613. The connection method of the air inlet of the second dedicated air duct 63 and the air outlet of the heat dissipation air duct 31, and the connection method of the air outlet of the second dedicated air duct 63 and the air inlet 613 may be fixedly connected by bolts / screws, or fixedly connected by bonding, which is not limited in this embodiment.

[0042] Furthermore, the transverse air duct is a groove-like air duct, and a horizontal air outlet 614 of the groove-like air duct is fixedly connected to an air inlet of the fan 4; a first side air inlet 611 is provided on a first side of the groove-like air duct toward the first lower installation chamber 112, so that the hot air in the first lower installation chamber 112 enters the mixing air duct 61; a second side air inlet 612 is provided on a second side of the groove-like air duct toward the second lower installation chamber 122, so that the hot air in the second lower installation chamber 122 enters the mixing air duct 61; finally, the air in the mixing air duct 61 is discharged out of the sealed cabinet 1 through the fan 4.

[0043] Specifically, the shapes of the first side air inlet 611 and the second side air inlet 612 are set according to actual needs, and are not limited in this embodiment. For example, in one embodiment, the first side air inlet 611 and the second side air inlet 612 have the same shape, both of which are rectangular openings; for another example, in another embodiment, the first side air inlet 611 is in the shape of a rectangular opening, and the second side air inlet 612 is in the shape of a side air inlet composed of a plurality of circular holes.

[0044] In addition, the fixing method of the mixing air duct 61 and the first dedicated air duct 62, and the fixing method of the mixing air duct 61 and the air inlet of the fan 4 are also set according to actual needs, and are not limited in this embodiment. For example, in specific implementation, they can be fixedly connected by bolts / screws, or by adhesive fixing.

[0045] Furthermore, Figure 7 This is a diagram showing the coordination relationship between the reactor and the first dedicated air duct, which is an exemplary embodiment of the present application. Please also refer to Figure 2 and Figure 7 The reactor 2 is provided with a first air guide cover 7 that matches the size of the reactor 2, and the air outlet of the first air guide cover 7 matches the air inlet of the first dedicated air duct 62, so that the wind enters the first dedicated air duct 62 from the lower part of the reactor 2 through the first air guide cover 7, and then passes through the mixing air duct 61 and the fan 4 to be discharged from the sealed cabinet. It should be noted that the first air guide cover 7 and the first dedicated air duct 62 can be fixedly connected by bolts / screws, or can be fixedly connected by bonding. In this embodiment, it is not limited thereto.

[0046] For details, please continue to refer to Figure 7 In a possible implementation, the first dedicated air duct 62 is composed of a cover-shaped air duct and a vertical air duct that are interconnected; the air inlet of the cover-shaped air duct is sealed and connected to the air outlet of the first air guide cover 7; and the air outlet of the vertical air duct is connected to the mixing air duct 61.

[0047] It should be noted that in order to ensure that the air duct assembly 6 maintains good stability in a complex environment, the air duct assembly 6 is usually made of materials with good mechanical strength, high temperature resistance and corrosion resistance. Therefore, the material of the air duct assembly 6 is set according to actual needs, and is not limited in this embodiment. For example, in one embodiment, the material of the air duct assembly 6 can be aluminum, aluminum alloy, copper-aluminum composite material, etc. It should be noted that the materials of the mixed air duct 61, the first dedicated air duct 62 and the second dedicated air duct 63 can be the same or different, and the materials can be selected according to actual needs. In this embodiment, they are not limited.

[0048] The heat dissipation principle of the radiator provided in this application is introduced below: For details, please continue to refer to Figure 2 , through the external air inlet 13 of the sealed cabinet 1, the air enters the first cavity 11 and the second cavity 12 from the sealed cabinet 1, the entire cabinet is sealed, and the cold air will flow along the designed route, as follows: Specifically, in the first cavity 11 (in the first cavity 11, components are evenly arranged, and there are no components that generate significant heat), wind enters the first lower installation chamber 112 from the external air inlet 13 on the front door panel of the first lower installation chamber 112. The control module 5 is installed in the first lower installation chamber 112. The wind enters from the bottom of the first lower installation chamber 112 and flows from bottom to top. When it reaches the top of the first lower installation chamber 112, the heat generated by the components in the first lower installation chamber 112 converts the cold air into hot air. Furthermore, the hot air enters the mixing air duct 61 through the first side air inlet 611 of the mixing air duct 61. The mixing air duct 61 is sealed and connected to the fan 4. Finally, the hot air is discharged from the external air outlet 14 to the outside of the sealed cabinet 1 through the fan 4.

[0049] It should be noted that, in a possible implementation, the air intake volume of the first side air inlet 611 is adjustable, and the first side air inlet 611 and the mixing air duct 61 are sealed and connected. By adjusting the air intake volume of the first side air inlet 611, the air volume inside the first cavity 11 can be controlled, thereby adjusting the heat dissipation temperature inside the first cavity 11 and improving the efficiency of the fan.

[0050] Furthermore, in the second cavity 12, after the cold air enters from the external air inlet 13 of the second lower installation chamber 122, it is divided into three winds, that is, there are three flow paths, as follows: First flow path: see Figure 2 and Figure 6 , Figure 6 The red arrow in the figure indicates the flow path of the wind inside the power module 3. Specifically, the wind flows into the heat dissipation duct 31 of the power module 3 from the bottom of the heat dissipation duct 31 of the power module 3. For further information, please refer to Figure 2 The heat dissipation air duct 31 is connected to the mixing air duct 61 through the second dedicated air duct 63. In this way, after the wind enters the heat dissipation air duct 31, it passes through the second dedicated air duct 63 and is finally discharged outside the sealed cabinet 1 through the mixing air duct 61 and the fan 4.

[0051] It should be noted that the heat dissipation air duct 31, the second dedicated air duct 63, and the mixing air duct 61 are sealed and connected. In addition, the power module 3 is fixed separately by bolts, and the second dedicated air duct 63 and the mixing air duct 61 will not be affected when the power module 3 is disassembled and maintained.

[0052] Second flow path: Please also refer to Figure 2 and Figure 7The wind flows in from the bottom of the reactor 2 , passes through the first wind guide cover 7 and enters the first dedicated air duct 62 , and finally enters the mixing air duct 61 , and is discharged from the external air outlet 14 through the fan 4 .

[0053] It should be noted that the first air guide cover 7 and the first dedicated air duct 62, and the first dedicated air duct 62 and the mixing air duct 61 are connected by bolts. In this way, when maintaining the reactor 2, it is only necessary to remove the connection between the first air guide cover 7 and the first dedicated air duct 62, and other air ducts will not be affected.

[0054] In addition, in a possible implementation, the air intake volume of the first dedicated air duct 62 is adjustable, so that the air intake volume of the first air guide cover 7 can be controlled, and the temperature of the reactor 2 can be adjusted more efficiently through the fan.

[0055] Third flow path: It should be noted that the third flow path is used to remove the heat of other components in the second lower installation chamber 122. Specifically, the wind in the second lower installation chamber 122 enters the mixing air duct 61 from the second side air inlet 612 of the mixing air duct 61, and is discharged from the external air outlet 14 through the fan 4.

[0056] It should be noted that the air intake volume of the second side air inlet 612 is adjustable. By adjusting the air intake volume, the top components of the second cavity 12 can be cooled so that there are no ventilation dead corners in the second cavity 12.

[0057] Referring to the previous description, optionally, in a possible implementation, the air intake volume of the first side air inlet 611 is adjustable, and / or the air intake volume of the second side air inlet 612 is adjustable, and / or the air intake volume of the first dedicated air duct 62 is adjustable.

[0058] In a specific implementation, for example, in one possible implementation, an air volume regulating valve is provided on the first side air inlet 611, the second side air inlet 612 and / or the first dedicated air duct 62 to adjust the air intake volume through the air volume regulating valve.

[0059] The air-cooled energy storage inverter provided in the present embodiment makes the air inlet volume of the first side air inlet adjustable, the air inlet volume of the second side air inlet adjustable, and the air inlet volume of the first dedicated air duct adjustable. In this way, the air volume of each cavity can be adjusted by adjusting the air inlet volume, so that the air volume of each cavity is controlled. In this way, in actual use, the temperature of each area can be monitored through temperature control monitoring, and then the air volume can be distributed by adjusting the air inlet volume to control the temperature rise of each area, so that the temperature rise of each area is maintained within the design range, and uneven heat dissipation will not occur, thereby reducing damage to components and reducing maintenance costs.

[0060] In summary, after the cold air enters the sealed cabinet, it passes through various heat-generating components, especially important heat-generating components such as power modules and reactors. The air outlets of the first cavity and the second cavity are all merged into the mixed air duct and then all discharged from the cabinet through the fan. Referring to the previous introduction, it can be seen that the converter provided in this embodiment only needs to be configured with one fan to solve the heat dissipation problem of the converter, which can save space and cost; in addition, by making the air inlet volume of the first side air inlet adjustable, the air inlet volume of the second side air inlet adjustable, and the air inlet volume of the first dedicated air duct adjustable, this is equivalent to adding the adjustable function of the cavity air volume, so that the wind direction and air volume are controlled. In this way, the temperature of each area can be obtained through temperature control monitoring, and then the air volume can be distributed by adjusting the air inlet volume to control the temperature rise of each area, so that the temperature rise of each area is maintained within the design range, and there will be no uneven heat dissipation phenomenon, thereby reducing component damage and reducing maintenance costs.

[0061] In addition, fans can be selected accurately to maximize fan efficiency, reduce redundancy, reduce costs and save space. There will also be no situation where a failure in one cooling system in a multi-fan system causes all of them to malfunction, which can reduce the failure rate.

[0062] The air-cooled energy storage inverter provided by the present application, on the one hand, can control the direction of wind flow by optimizing the structural layout and the air duct structure, thus ensuring the smoothness of air flow and the high efficiency of cooling, and can carry out heat dissipation in a targeted manner, and can ensure that when a fan is built in, the wind flows along the set route to achieve the purpose of heat dissipation, thus avoiding the problems existing in external fans and multiple built-in fans; on the second hand, by installing different functional modules in different positions and separating the heat dissipation paths of the power module and the reactor, it is possible to avoid mutual interference between heat from different modules, ensure that heat does not accumulate inside the cabinet, and improve the overall heat dissipation efficiency; on the third hand, the air-cooled energy storage inverter provided by the present application, each module is independent of each other, and can be independently disassembled and maintained, reducing the impact of a single module failure on the entire inverter, and can improve the convenience of maintenance.

[0063] In addition, the air-cooled energy storage inverter provided in the present application can control the air volume by making the air inlet volume of the first side air inlet adjustable, the air inlet volume of the second side air inlet adjustable, and the air inlet volume of the first dedicated air duct adjustable. In this way, by adjusting the air inlet volume, the air volume can be distributed to control the temperature rise of each area, so that the temperature rise of each area is maintained within the design range to avoid uneven heat dissipation, achieve heat dissipation balance, and further avoid the problem of component damage due to uneven heat dissipation, which can reduce component damage and reduce maintenance costs.

[0064] It should be noted that, referring to the previous description, the air-cooled energy storage inverter provided by the present application has modules that are independent of each other and can be independently disassembled, assembled and maintained. By replacing the mixing air duct, the purpose of adjusting the air intake volume of the first side air inlet and / or the air intake volume of the second side air inlet can be achieved; in addition, by replacing the first dedicated air duct, the purpose of adjusting the air intake volume of the first dedicated air duct can be achieved.

[0065] Optional, please continue to refer to Figure 1 The air-cooled energy storage converter also includes a backup power supply module 8 , and the backup power supply module 8 is installed in the first upper installation chamber 111 .

[0066] The energy storage inverter provided in this embodiment is provided with a backup power module in the first upper installation room. Thus, when the main power fails or the power supply is unstable, the backup power module can be used to provide continuous power support for the air-cooled energy storage inverter, thereby improving the reliability and stability of the system. Furthermore, when the main power supply is maintained and repaired, it is not necessary to shut down completely, which can shorten the maintenance time and improve the availability of the equipment.

[0067] The present application also provides a converter unit, which includes at least two sets of any air-cooled energy storage converter provided in the first aspect of the present application.

[0068] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An air-cooled energy storage converter, characterized in that: The air-cooled energy storage converter includes a sealed cabinet, a reactor, a power module, a fan, a control module and an air duct assembly; wherein, The inner cavity of the sealed cabinet is divided into a first cavity and a second cavity by a vertical partition; the first cavity is divided into a first upper installation chamber and a first lower installation chamber by a transverse partition; the second cavity is divided into a second upper installation chamber and a second lower installation chamber by a transverse partition; the first upper installation chamber, the first lower installation chamber, the second upper installation chamber and the second lower installation chamber are sealed and isolated; the first lower installation chamber and the second lower installation chamber are provided with an external air inlet; the first upper installation chamber and the second upper installation chamber are provided with an external air outlet; The control module is installed in the first lower installation chamber; the fan is installed in the second upper installation chamber; the reactor and the power module are installed in the second lower installation chamber, and the power module is located above the reactor; The air duct assembly includes a mixing air duct, and a first dedicated air duct and a second dedicated air duct respectively connected to the mixing air duct; the mixing air duct is arranged behind the power module, and the air outlet of the mixing air duct is connected to the air inlet of the fan; The reactor is sleeved with a first air guide cover, and the air outlet of the first air guide cover is connected with the air inlet of the first dedicated air duct, so that the air is introduced from the lower part of the reactor into the first dedicated air duct through the first air guide cover, and then discharged from the sealed cabinet after passing through the mixing air duct and the fan; The second dedicated air duct is in communication with the heat dissipation air duct of the power module, so that the air entering the power module enters the mixing air duct after passing through the heat dissipation air duct and the second dedicated air duct, and is discharged from the sealed cabinet after passing through the mixing air duct and the fan; The mixing air duct has a first side air inlet and a second side air inlet, the first side air inlet is connected to the first lower installation chamber, and the second side air inlet is connected to the second lower installation chamber, so that the wind entering the first lower installation chamber and the second lower installation chamber enters the mixing air duct through the side air inlet, and is discharged from the sealed cabinet after passing through the mixing air duct and the fan.

2. The air-cooled energy storage converter according to claim 1, characterized in that: The air inlet volume of the first side air inlet is adjustable; and / or, The air inlet volume of the second side air inlet is adjustable; and / or, The air inlet volume of the first dedicated air duct is adjustable.

3. The air-cooled energy storage converter according to claim 1, characterized in that: The mixing air duct is an L-shaped air duct; wherein, The L-shaped air duct is composed of a vertical air duct and a horizontal air duct that are interconnected; the lower port of the vertical air duct is connected to the air outlet of the first dedicated air duct; an air inlet is provided at a position where the vertical air duct is directly opposite to the heat dissipation air duct, and the second dedicated air duct is connected to the air outlet of the heat dissipation air duct and the air inlet; The transverse air duct is a groove-like air duct, and the horizontal air outlet of the groove-like air duct is connected to the air inlet of the fan; the first side air inlet is arranged on the first side of the groove-like air duct facing the first lower installation chamber, and the second side air inlet is arranged on the second side of the groove-like air duct facing the second lower installation chamber.

4. The air-cooled energy storage converter according to claim 1, characterized in that: The first dedicated air duct is composed of a cover-shaped air duct and a vertical air duct which are interconnected; the air inlet of the cover-shaped air duct is sealed and connected to the air outlet of the first air guide cover; and the air outlet of the vertical air duct is connected to the mixing air duct.

5. The air-cooled energy storage converter according to claim 2, characterized in that: The first side air inlet, the second side air inlet and / or the first dedicated air duct are provided with an air volume regulating valve so as to adjust the air intake volume through the air volume regulating valve.

6. The air-cooled energy storage converter according to claim 1, characterized in that: The air-cooled energy storage converter also includes a backup power supply module, which is installed in the first upper installation chamber.

7. The air-cooled energy storage converter according to claim 1, characterized in that: Two external air inlets are arranged on the front door panels of the first lower installation chamber and the second upper installation chamber.

8. The air-cooled energy storage converter according to claim 7, characterized in that: An external air outlet is disposed on the front door plate and the back plate of the first upper installation chamber and the second upper installation chamber.

9. The air-cooled energy storage converter according to claim 8, characterized in that: A sealing cover is sleeved on the fan; a side of the sealing cover facing the front door plate and a side of the sealing cover facing the back plate are hollow structures.

10. A converter unit, characterized in that: It comprises at least two sets of air-cooled energy storage converters as described in any one of claims 1 to 9.

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