Inverter and energy storage system

Abstract

The utility model discloses an inverter and an energy storage system. The inverter comprises a box body, a first circuit board and a fan, a containing cavity is formed in the box body, the first circuit board is arranged in the containing cavity and connected with the box body, the containing cavity is divided into a first cavity and a second cavity by the first circuit board, the fan is embedded in the first circuit board and comprises a fan body and fan blades, an air guide channel is formed in the fan body, and the fan blades are rotationally connected into the air guide channel. One part of the air guide channel communicates with the first cavity, the other part of the air guide channel communicates with the second cavity, and the fan blades can rotate relative to the air guide channel so as to drive air in the first cavity and the second cavity to flow at the same time. According to the inverter, the fan is arranged in the first circuit board, and the air guide channel is formed by using the fan, so that the air guide channel is communicated with the first cavity and the second cavity at the same time, air flow in the air guide channel can promote air circulation in the first cavity and the second cavity at the same time, and the heat dissipation efficiency in the inverter is improved.

Description

Technical Field

[0001] This application belongs to the field of photovoltaic inverter technology, specifically relating to an inverter and an energy storage system. Background Technology

[0002] As Earth's resources are depleted, people are beginning to value the development and utilization of renewable energy. Solar photovoltaic systems have become a major energy source due to their advantages such as being environmentally friendly, pollution-free, renewable, and having great development potential. The electricity generated by solar power systems is direct current (DC), which must be converted into alternating current (AC) by an inverter before it can be output to the grid-connected power generation system. Therefore, the performance of the photovoltaic grid-connected inverter is a crucial indicator of the success or failure of a photovoltaic power station construction.

[0003] An inverter typically includes a housing, a circuit board, and power devices. The circuit board is housed inside the housing, and the power devices are mounted on the circuit board and electrically connected to it. During operation, the power devices continuously generate heat. When this heat accumulates inside the housing and cannot be dissipated in time, it will cause the internal temperature of the housing to rise, thereby affecting the operational reliability and lifespan of the power devices. Utility Model Content

[0004] This application aims to provide an inverter and energy storage system that can solve the problem in related technologies where heat inside the inverter cannot be dissipated in a timely manner, affecting the operational reliability of power devices.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide an inverter, comprising: a housing, a first circuit board, and a fan;

[0007] The housing is provided with a receiving cavity, the first circuit board is disposed in the receiving cavity and connected to the housing, the first circuit board divides the receiving cavity into a first chamber and a second chamber, and the fan is embedded in the first circuit board;

[0008] The fan includes a fan body and fan blades. An air guide channel is formed in the fan body. The fan blades are rotatably connected to the air guide channel. A part of the air guide channel is connected to the first chamber and another part is connected to the second chamber. The fan blades can rotate relative to the air guide channel to simultaneously drive the air flow in the first chamber and the second chamber.

[0009] Optionally, the inverter further includes a plurality of first components, which are respectively disposed on the side of the first circuit board facing the first chamber, and are electrically connected to the first circuit board; the plurality of first components are arranged at intervals to form a first air duct between two adjacent first components.

[0010] Optionally, the first air duct includes a first sub-air duct extending along a first direction and a second sub-air duct extending along a second direction. The first sub-air duct and the second sub-air duct are interconnected. The first direction and the second direction are both perpendicular to the arrangement direction of the first chamber and the second chamber, and the first direction and the second direction intersect.

[0011] Optionally, the first component includes at least one of an inverter module, a thin-film capacitor, a buck-boost module, an auxiliary power module, an electrolytic capacitor, and a first inductor assembly.

[0012] Optionally, the inverter further includes a second circuit board and a plurality of second components. The second circuit board is disposed in the second cavity and spaced apart from the first circuit board. The plurality of second components are respectively disposed on the side of the second circuit board facing the first circuit board and are electrically connected to the second circuit board. The plurality of second components are arranged at intervals to form a second air duct between two adjacent second components.

[0013] Optionally, the second air duct includes a third sub-air duct extending along a first direction and a fourth sub-air duct extending along a second direction. The third sub-air duct and the fourth sub-air duct are interconnected. The first direction and the second direction are both perpendicular to the arrangement direction of the first chamber and the second chamber, and the first direction and the second direction intersect.

[0014] Optionally, the second component includes at least one of a load grid-connected module, a battery module, and a second inductor component.

[0015] Optionally, the ratio of the total heat generation power of the plurality of first components to the total heat generation power of the plurality of second components is a first ratio, and the ratio of the cross-sectional area of ​​the air guide channel connecting the first chamber to the cross-sectional area of ​​the air guide channel connecting the second chamber is a second ratio, wherein the first ratio and the second ratio are positively correlated.

[0016] Optionally, the housing includes a shell and a cover plate, the shell having a receiving groove with an opening, and the cover plate sealing the opening to form the receiving cavity.

[0017] Secondly, embodiments of this application propose an energy storage system including the inverter described in any of the above claims.

[0018] In this embodiment, a fan is installed in the first circuit board to form an air guide channel. Part of the air guide channel is connected to the first chamber inside the housing, and another part is connected to the second chamber inside the housing. The fan blades rotate in the air guide channel to form an airflow. The airflow flows out of the air guide channel to drive the airflow around the fan, thereby promoting air circulation in the first and second chambers, improving the heat dissipation efficiency inside the inverter, ensuring a suitable operating temperature inside the inverter, and improving the reliability and service life of the inverter.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a partial cross-sectional schematic diagram of an inverter according to an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the structure of the first chamber according to an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the structure of the second chamber according to an embodiment of this application;

[0024] Figure 4 This is an exploded view of an inverter according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the structure of a fan according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram illustrating the working principle of the fan inside the housing according to an embodiment of this application.

[0027] Figure label:

[0028] 100: Housing; 110: Receiving cavity; 111: First chamber; 112: Second chamber; 120: Shell; 130: Cover plate; 200: First circuit board; 300: Fan; 310: Fan body; 311: Air guide channel; 320: Fan blade; 400: First component; 410: First air duct; 411: First sub-air duct; 412: Second sub-air duct; 420: Inverter module; 430: Film capacitor; 440: Buck-boost module; 450: Auxiliary power module; 460: Electrolytic capacitor; 470: First inductor assembly; 500: Second component; 510: Second air duct; 511: Third sub-air duct; 512: Fourth sub-air duct; 520: Load grid connection module; 530: Battery module; 540: Second inductor assembly; 600: Second circuit board; X: First direction; Y: Second direction. Detailed Implementation

[0029] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] The inverter and energy storage system provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0034] like Figure 1 and Figure 5 As shown, an inverter according to some embodiments of this application includes: a housing 100, a first circuit board 200, and a fan 300; the housing 100 has a receiving cavity 110, the first circuit board 200 is disposed in the receiving cavity 110 and connected to the housing 100, the first circuit board 200 divides the receiving cavity 110 into a first chamber 111 and a second chamber 112, and the fan 300 is embedded in the first circuit board 200; the fan 300 includes a fan body 310 and a fan blade 320, an air guide channel 311 is formed in the fan body 310, the fan blade 320 is rotatably connected to the air guide channel 311, a part of the air guide channel 311 communicates with the first chamber 111, and another part communicates with the second chamber 112, the fan blade 320 can rotate relative to the air guide channel 311 to simultaneously drive the air flow in the first chamber 111 and the second chamber 112.

[0035] In this embodiment, a fan 300 is installed in the first circuit board 200 to form an air guide channel 311. A portion of the air guide channel 311 is connected to the first chamber 111 inside the housing 100, and another portion is connected to the second chamber 112 inside the housing 100. The fan blades 320 rotate in the air guide channel 311 to form an airflow. The airflow flows out from the air guide channel 311 to drive the airflow around the fan, thereby promoting air circulation in the first chamber 111 and the second chamber 112, improving the heat dissipation efficiency inside the inverter, ensuring a suitable operating temperature inside the inverter, and improving the reliability and service life of the inverter.

[0036] In addition, by embedding the fan 300 in the first circuit board 200, the air guide channel formed by the fan 300 can simultaneously promote air circulation in the first chamber 111 and the second chamber 112. This reduces the number of fans 300 used, thereby reducing production costs and simplifying the inverter assembly work, and improving production efficiency.

[0037] Specifically, the inverter includes a housing 100, a first circuit board 200, and a fan 300. The housing 100 has an internal cavity 110. The first circuit board 200 is installed inside the cavity 110 and connected to the housing 100. The first circuit board 200 divides the cavity 110 into a first chamber 111 and a second chamber 112. Figure 5 As shown, the fan 300 includes a fan body 310, fan blades 320, and a motor (not shown). An air guide channel 311 is formed in the fan body 310. The fan blades 320 are rotatably connected within the air guide channel 311. The air guide channel 311 has an air inlet and an air outlet. The motor is connected to the fan blades 320. When the motor is energized, it drives the fan blades 320 to rotate. The fan blades 320 cause the air flowing in from the air inlet to move rapidly, thus forming an airflow. The airflow flows out from the air outlet, thereby driving the airflow around the fan. Furthermore, the extension direction of the air guide channel 311 is perpendicular to the arrangement direction of the first chamber 111 and the second chamber 112, so that a portion of the air guide channel 311 communicates with the first chamber 111, and another portion communicates with the second chamber 112. This allows the airflow in the air guide channel 311 to simultaneously promote air circulation within both chambers.

[0038] It is understood that in the inverter of this application, the housing 110 inside the enclosure 100 can be a closed chamber. The heat in the closed chamber is exchanged with the outside through the side wall of the enclosure for heat dissipation. This heat dissipation method has low heat dissipation efficiency, and the heat generated by the different power of the components in the housing 110 is also different, which will lead to uneven heat distribution in the housing 110.

[0039] To address this, this application incorporates a fan 300 within the housing 110. The airflow generated by the fan 300 in the air guide channel 311 simultaneously promotes air circulation in both the first chamber 111 and the second chamber 112, thereby improving the uniformity of heat distribution within the first chamber 111 and the second chamber 112. This allows the heat in the first chamber 111 and the second chamber 112 to be quickly dissipated through the side walls of the housing, improving heat dissipation efficiency. Furthermore, the sealed chambers prevent external impurities from entering the housing 100 and contaminating components or circuit boards, thus affecting the normal operation of the inverter.

[0040] Optionally, such as Figure 2 As shown, the inverter also includes a plurality of first components 400, which are respectively disposed on the side of the first circuit board 200 facing the first chamber 111, and are electrically connected to the first circuit board 200. The plurality of first components 400 are arranged at intervals to form a first air duct 410 between two adjacent first components 400.

[0041] In this embodiment, by arranging multiple first components 400 at intervals to form a first air duct 410 between adjacent first components 400, the flow path of airflow from the air guide channel 311 can be guided, allowing more airflow to pass through the first components 400, promoting air circulation around each first component 400, thereby reducing heat accumulation near the first components 400 and improving the heat dissipation efficiency of each first component 400. Furthermore, by utilizing the arrangement structure of the first components 400 to form the first air duct 410, this application can save on the installation of air duct baffles, reduce production costs, and simplify the inverter assembly process, thereby improving production efficiency.

[0042] Specifically, the inverter includes a plurality of first components 400, which are respectively disposed on the side of the first circuit board 200 facing the first chamber 111, and are electrically connected to the first circuit board 200 so that the first components 400 can operate; the plurality of first components 400 are arranged in a row at intervals on the first circuit board 200, and a first air duct 410 is formed between two adjacent first components 400, and the airflow from the air guide channel 311 flows in the first air duct 410.

[0043] Optionally, such as Figure 2 As shown, the first air duct 410 includes a first sub-air duct 411 extending along a first direction X and a second sub-air duct 412 extending along a second direction Y. The first sub-air duct 411 and the second sub-air duct 412 are interconnected. The first direction X and the second direction Y are both perpendicular to the arrangement direction of the first chamber 111 and the second chamber 112, and the first direction X and the second direction Y intersect.

[0044] In this embodiment of the application, by setting a first sub-air duct 411 extending along the first direction X and a second sub-air duct 412 extending along the second direction Y, and the first sub-air duct 411 and the second sub-air duct 412 being interconnected, the airflow flowing out of the air guide channel 311 can be guided to circulate along different paths, making the heat distribution in the inverter more uniform, and thus enabling faster and smoother exhaust from the inverter housing 100, thereby further improving the heat dissipation efficiency.

[0045] Specifically, the inverter includes multiple first components 400. For example, the multiple first components 400 can be first component A, first component B, and first component C. With the airflow direction of the air duct 311 as the first direction X, first components A and B are arranged at intervals along the second direction Y, thereby forming a first sub-air duct 411 extending along the first direction X between first components A and B. Furthermore, first component C is disposed on one side of first components A and first component B along the first direction X, and first component C is arranged at intervals with first components A and B, thereby forming a second sub-air duct 412 extending along the second direction Y between first component C and first components A and B. In this way, the formed second sub-air duct 412 is connected to the first sub-air duct 411, so that the airflow from the air guide channel 311 can circulate between the first sub-air duct 411 and the second sub-air duct 412, thereby promoting air circulation around the first component A, the first component B, and the first component C. The first direction X and the second direction Y are both perpendicular to the arrangement direction of the first chamber 111 and the second chamber 112, and the first direction X intersects the second direction Y; for example, the first direction X and the second direction Y can be perpendicular.

[0046] It should also be noted that the number of the first sub-air duct 411 extending along the first direction X and the second sub-air duct 412 extending along the second direction Y may be multiple. The number of the first sub-air duct 411 and the second sub-air duct 412 can be set according to the number and arrangement of the first components 400, and this embodiment does not limit it.

[0047] Optionally, such as Figure 2 As shown, the first component 400 includes at least one of the following: inverter module 420, thin film capacitor 430, buck-boost module 440, auxiliary power module 450, electrolytic capacitor 460, and first inductor assembly 470.

[0048] In this embodiment of the application, by providing at least one of the following components in the first circuit board 200: inverter module 420, thin film capacitor 430, buck-boost module 440, auxiliary power module 450, electrolytic capacitor 460, and first inductor component 470, the inverter is able to convert direct current into alternating current.

[0049] The inverter module 420 is the core component of the inverter, mainly responsible for power conversion. The inverter module 420 includes switching elements, a control circuit, and a filter circuit. Driven by the control circuit, the switching elements open and close at high speed, converting DC power into high-frequency AC power. The filter circuit removes harmonic components from the high-frequency AC power, resulting in a smooth AC output. During the conversion of DC power to AC power by the inverter module 420, large surge voltages can easily be generated. The thin-film capacitor 430 can smooth, suppress, and remove these surge voltages, thus ensuring the stability of the inverter's output voltage. The buck-boost module 440 can boost or buck the input voltage, enabling the inverter to operate normally within different input voltage ranges.

[0050] The auxiliary power supply module 450 converts the DC power supply voltage into a suitable value to provide to the drive and control circuits in the inverter, thereby enhancing the stability of the inverter's operation. The electrolytic capacitor 460 not only effectively filters noise from the inverter's input power supply, ensuring the stability and purity of the inverter's output, but also smooths the output pulse signal, thus improving the stability of the inverter's output voltage.

[0051] The first inductor component 470 can filter the DC input signal, thereby improving the stability and smoothness of the AC output by the inverter.

[0052] Optionally, such as Figure 3 As shown, the inverter also includes a second circuit board 600 and a plurality of second components 500. The second circuit board 600 is disposed in the second chamber 112 and is spaced apart from the first circuit board 200. The plurality of second components 500 are respectively disposed on the side of the second circuit board 600 facing the first circuit board 200 and are electrically connected to the second circuit board 600. The plurality of second components 500 are arranged at intervals to form a second air duct 510 between two adjacent second components 500.

[0053] In this embodiment of the application, by setting the second circuit board 600 in the second chamber 112 and setting multiple second components 500 at intervals on the second circuit board 600, a second air duct 510 can be formed. The airflow flowing into the second chamber 112 from the air guide channel 311 drives the air circulation near the second components 500, thereby improving the heat dissipation efficiency in the second chamber 112.

[0054] Specifically, a second circuit board 600 is disposed within the second chamber 112 and connected to the housing 100. The second circuit board 600 is spaced apart from the first circuit board 200. Multiple second components 500 are spaced apart on the second circuit board 600 and electrically connected to it, enabling the second components 500 to operate normally. A second air duct 510 is formed between adjacent second components 500. For example, an inverter may include two second components 500, which are arranged opposite each other along a second direction Y to form a second air duct 510. Airflow from the air guide channel 311 flows within the second air duct 510.

[0055] Optionally, such as Figure 3 As shown, the second air duct 510 includes a third sub-air duct 511 extending along the first direction X and a fourth sub-air duct 512 extending along the second direction Y, and the third sub-air duct 511 and the fourth sub-air duct 512 are interconnected.

[0056] In this embodiment, by setting a third sub-air duct 511 extending along the first direction X and a fourth sub-air duct 512 extending along the second direction Y, and by connecting the third sub-air duct 511 and the fourth sub-air duct 512 to each other, the airflow flowing out of the air guide channel 311 can be guided to circulate along the paths of the first direction X and the second direction Y, promoting the flow of air at different positions in the second chamber 112, thereby making the heat distribution in the second chamber 112 more uniform. This allows the heat to be discharged from the inverter housing 100 more quickly and smoothly, thereby further improving the heat dissipation efficiency.

[0057] Specifically, the second chamber 112 of the inverter includes a plurality of second components 500. For example, the plurality of second components 500 can be second component A, second component B, and second component C, with second components A and B arranged at intervals along the second direction Y, thereby forming a third sub-air duct 511 extending along the first direction X between second components A and B. Furthermore, second component C is disposed on one side of second components A and B along the first direction X, and second component C is arranged at intervals with second components A and B, thereby forming a fourth sub-air duct 512 extending along the second direction Y between second component C and second components A and B. The third sub-air duct 511 and the fourth sub-air duct 512 are connected, so that the airflow flowing out of the air guide channel 311 can circulate between the third sub-air duct 511 and the fourth sub-air duct 512, thereby promoting air circulation around second components A, B, and C.

[0058] It should also be noted that the number of the third sub-air duct 511 extending along the first direction X and the fourth sub-air duct 512 extending along the second direction Y may be multiple. The number of the third sub-air duct 511 and the fourth sub-air duct 512 can be set according to the number and arrangement of the second components 500. This embodiment does not limit them.

[0059] Optionally, such as Figure 3 As shown, the second component 500 includes at least one of a load grid-connected module 520, a battery module 530, and a second inductor assembly 540.

[0060] In this embodiment of the application, by providing at least one of the load grid-connected module 520, battery module 530 and second inductor component 540 in the second circuit board 600, the AC power output by the inverter can be connected to the power grid.

[0061] It should be noted that the load grid connection module 520 is a key component of the inverter. The load grid connection module 520 can not only connect the AC power output of the inverter to the power grid to ensure that the AC power can be successfully connected to the power grid, but also regulate the voltage, frequency and other parameters of the AC power output of the inverter to ensure that the converted AC power meets the requirements of the power grid.

[0062] Among them, the battery module 530 is an energy storage element in the inverter, which can store electrical energy from solar panels or other DC power sources. In cases of insufficient sunlight or wind power, the battery module 530 can release the stored electrical energy to continuously power the inverter.

[0063] The second inductor component 540 can store energy and release energy when needed. When the switching element is on or off, the inductor stores energy, and when the on or off state of the switching element changes, the inductor releases energy.

[0064] Optionally, the ratio of the total heating power of the multiple first components 400 to the total heating power of the multiple second components 500 is a first ratio, and the ratio of the cross-sectional area of ​​the air guide channel 311 to the first chamber 111 and the cross-sectional area of ​​the air guide channel 311 to the second chamber 112 is a second ratio, and the first ratio and the second ratio are positively correlated.

[0065] In this embodiment of the application, by determining the second ratio of the cross-sectional area of ​​the air guide channel 311 in the first chamber 111 and the second chamber 112 through the first ratio of the total heat generation power of the first component 400 in the first chamber 111 and the second component 500 in the second chamber 112, the air guide channel 311 can be utilized more fully and rationally, thereby effectively improving the heat dissipation effect of the first chamber 111 and the second chamber 112.

[0066] It should be noted that, as Figure 1and Figure 6 As shown, the fan 300 is embedded in the first circuit board 200, and an air guide channel 311 is formed in the fan body 310 of the fan 300, such as... Figure 6 As shown, the upper part of the air guide channel 311 (i.e. Figure 6 Part A shown in the diagram is connected to the first chamber 111, and the lower half of the air guide channel 311 (i.e. Figure 6 Part B shown in the diagram is connected to the second chamber 112.

[0067] Furthermore, the cross-sectional area connecting the air guide channel 311 and the first chamber 111 refers to the cross-sectional area of ​​the part where the air outlet of the fan 300 connects to the first chamber 111, that is, Figure 6 The cross-sectional area of ​​the portion of the central air duct 311 connected to the first chamber 111.

[0068] The cross-sectional area connecting the air guide duct 311 and the second chamber 112 refers to the cross-sectional area of ​​the part where the air outlet of the fan 300 connects to the second chamber 112, that is, Figure 6 The cross-sectional area of ​​the portion of the central air duct 311 connected to the second chamber 112.

[0069] In other words, when the total heat generation power of the first component 400 is greater than the total heat generation power of the second component 500, the heat in the first chamber 111 is higher than the heat in the second chamber 112. In this case, the cross-sectional area of ​​the portion A of the air guide channel 311 connecting to the first chamber 111 needs to be set larger than the cross-sectional area of ​​the portion B of the air guide channel 311 connecting to the second chamber 112. This allows more airflow in the air guide channel 311 to pass through the first chamber 111, promoting air circulation and thus improving the heat dissipation effect of the first chamber 111. The reverse is also true.

[0070] For example, the second ratio can be set to 0.5, 1, 1.5, 2, 2.5, 3, etc., and can be flexibly set according to the size of the first ratio. This embodiment does not limit it.

[0071] Optionally, such as Figure 4 As shown, the housing 100 includes a shell 120 and a cover plate 130. The shell 120 is provided with a receiving groove with an opening. The cover plate 130 covers the opening to form a receiving cavity 110.

[0072] In this embodiment, by covering the groove of the housing 120 with a cover plate 130, a receiving cavity 110 is formed. This allows the first circuit board 200, the second circuit board 600, the first component 400, and the second component 500 to be installed in the receiving cavity 110. The cover plate 130 and the housing 120 together form a sealed space, which can prevent external impurities from entering the housing 120 and contaminating the components or circuit boards in the receiving cavity 110, thus affecting the normal operation of the inverter.

[0073] Optionally, embodiments of this application also provide an energy storage system, including the inverter described above.

[0074] In this embodiment, a fan 300 is installed in the first circuit board 200 to form an air guide channel 311. A portion of the air guide channel 311 is connected to the first chamber 111 inside the housing 100, and another portion is connected to the second chamber 112 inside the housing 100. The fan blades 320 rotate in the air guide channel 311 to form an airflow. The airflow flows out from the air guide channel 311 to drive the airflow around the fan, thereby promoting air circulation in the first chamber 111 and the second chamber 112, improving the heat dissipation efficiency inside the inverter, ensuring a suitable operating temperature inside the inverter, and improving the reliability and service life of the inverter.

[0075] In addition, by embedding the fan 300 in the first circuit board 200, the air guide channel 311 formed by the fan 300 can simultaneously promote air circulation in the first chamber 111 and the second chamber 112. This can reduce the number of fans 300 used, thereby reducing production costs and simplifying the assembly of the inverter, and improving production efficiency.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An inverter, characterized by comprising: The inverter comprises: a box, a first circuit board and a fan; a containing cavity is arranged in the box, the first circuit board is arranged in the containing cavity and connected with the box, the first circuit board divides the containing cavity into a first chamber and a second chamber, and the fan is embedded in the first circuit board; the fan comprises a fan body and a fan blade, a wind guide channel is formed in the fan body, the fan blade is rotationally connected in the wind guide channel, a part of the wind guide channel is communicated with the first chamber, and another part of the wind guide channel is communicated with the second chamber, and the fan blade can rotate relative to the wind guide channel to simultaneously drive the air in the first chamber and the second chamber to flow.

2. The inverter of claim 1, wherein, a plurality of first components are arranged on one side of the first circuit board facing the first chamber, and the plurality of first components are electrically connected with the first circuit board; and the plurality of first components are arranged at intervals to form a first air duct between adjacent two first components.

3. The inverter of claim 2, wherein, The first air duct comprises a first sub-air duct extending in a first direction and a second sub-air duct extending in a second direction, the first sub-air duct and the second sub-air duct are communicated with each other, the first direction and the second direction are both perpendicular to the arrangement direction of the first chamber and the second chamber, and the first direction intersects with the second direction.

4. The inverter of claim 2, wherein, The first component comprises at least one of an inverter module, a film capacitor, a boost-buck module, an auxiliary source module, an electrolytic capacitor and a first inductor assembly.

5. The inverter according to any one of claims 2 or 4, characterized by a second circuit board and a plurality of second components are further arranged, the second circuit board is arranged in the second chamber and spaced apart from the first circuit board, the plurality of second components are arranged on one side of the second circuit board facing the first circuit board, and the plurality of second components are electrically connected with the second circuit board; and the plurality of second components are arranged at intervals to form a second air duct between adjacent two second components.

6. The inverter of claim 5, wherein, The second air duct comprises a third sub-air duct extending in a first direction and a fourth sub-air duct extending in a second direction, the third sub-air duct and the fourth sub-air duct are communicated with each other, the first direction and the second direction are both perpendicular to the arrangement direction of the first chamber and the second chamber, and the first direction intersects with the second direction.

7. The inverter of claim 5, wherein, The second component comprises at least one of a load grid-connected module, a battery module and a second inductor assembly.

8. The inverter of claim 5, wherein, The ratio of the total heat generation power of the plurality of first components to the total heat generation power of the plurality of second components is a first ratio, the ratio of the communication cross-sectional area of the wind guide channel and the first chamber to the communication cross-sectional area of the wind guide channel and the second chamber is a second ratio, and the first ratio is positively correlated with the second ratio.

9. The inverter of claim 1, wherein, The box comprises a shell and a cover plate, the shell is provided with a containing groove, the containing groove has a groove opening, and the cover plate covers the groove opening to form the containing cavity.

10. An energy storage system characterized by, The inverter comprises at least one of claims 1-9. The inverter comprises at least one of claims 1-9.

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