Single-phase photovoltaic grid-connected inverter

Abstract

The utility model relates to the technical field of inverters, in particular to a single-phase photovoltaic grid-connected inverter. The LED lamp comprises a radiator, an inductor assembly is arranged on the side, close to the edge, of the inner surface of the radiator, a power plate is arranged on the side, away from the radiator, of the inductor assembly, an HMI plate is arranged on the side, away from the inductor assembly, of the power plate, and an upper cover is connected to the radiator in a sealed mode to form a closed cavity. The inductor assembly and the power board are both integrated on one side of the radiator, the HMI board is integrated on one side of the upper cover, and the inductor assembly, the power board and the HMI board are all located in the closed cavity. The device solves the problem that the mold opening cost of the inductance shell is high.

Description

Technical Field

[0001] The utility model relates to the technical field of inverters, in particular to a single-phase photovoltaic grid-connected inverter. Background Art

[0002] Photovoltaic grid-connected inverters are inverters that convert the DC voltage generated by photovoltaic solar panels into AC power at the mains frequency, which can be fed back to the commercial power transmission system or used for off-grid power grids.

[0003] The single-phase photovoltaic grid-connected inverter is a type of grid-connected inverter. The existing single-phase photovoltaic grid-connected inverter has an external inductor, which has the problems of high mold opening cost and heavy quality. Utility Model Content

[0004] In order to solve the problems in the related art, the utility model provides a single-phase photovoltaic grid-connected inverter, which solves the problem of high cost of inductor shell mold making.

[0005] In order to solve the above problems, the following technical solutions are provided:

[0006] The single-phase photovoltaic grid-connected inverter of the utility model comprises a radiator, an inductor component is arranged on one side of the inner surface of the radiator near the edge, a power board is arranged on the side of the inductor component away from the radiator, an HMI board is arranged on the side of the power board away from the inductor component, an upper cover is sealed and connected to the radiator to form a closed cavity, the inductor component and the power board are integrated on one side of the radiator, the HMI board is integrated on one side of the upper cover, and the inductor component, the power board and the HMI board are all located inside the closed cavity.

[0007] In the above scheme, the inductor component plays a filtering role, and the current is smoothed by the energy storage and freewheeling of the inductor. The power board is used to receive the generated DC power and match the voltage and current to ensure the stability and efficiency of the input power. The HMI board monitors and visualizes important data of the production process, thereby improving the operation efficiency and reliability. The inductor component, power board and HMI board of the single-phase photovoltaic grid-connected inverter are all located inside the closed cavity, thus solving the problem of high cost of inductor shell mold opening.

[0008] An annular groove is arranged around the inner surface of the radiator, and a sealing strip is installed in the annular groove, so that the radiator and the upper cover are matched in a sealed state.

[0009] In the above solution, the sealing strip is provided to improve the sealing between the radiator and the upper cover.

[0010] A switch power supply board is arranged on one side of the power board, and an arc fault control board is arranged on the other side of the power board.

[0011] In the above scheme, the switch power board is set to control the switch state of the inverter, thereby ensuring the normal operation of the inverter and the stability and safety of the output electric energy.

[0012] A display screen is connected to one side of the upper cover, and the inner side of the display screen is fixedly connected to a side of the HMI board close to the upper cover.

[0013] In the above scheme, the display screen is set to view data in real time.

[0014] A back plate is arranged on the outer side of the radiator.

[0015] In the above solution, the back plate is provided to fix the position of the inverter.

[0016] The above solution has the following advantages:

[0017] 1. The single-phase photovoltaic grid-connected inverter of the utility model includes a radiator, an inductor component is arranged on one side of the inner surface of the radiator near the edge, a power board is arranged on the side of the inductor component away from the radiator, an HMI board is arranged on the side of the power board away from the inductor component, an upper cover is sealed and connected to the radiator to form a closed cavity, the inductor component and the power board are integrated on one side of the radiator, the HMI board is integrated on one side of the upper cover, the inductor component, the power board and the HMI board are all located inside the closed cavity, the inductor component plays a filtering role, and the current is smoothed by the energy storage and continuous current of the inductor, the power board is used to receive the generated DC power, and match the voltage and current to ensure the stability and efficiency of the input power, the HMI board monitors and visualizes the important data of the production process, and visually displays it to improve the operation efficiency and reliability, the inductor component, the power board and the HMI board of the single-phase photovoltaic grid-connected inverter are all located inside the closed cavity, and the cost of opening the mold of the inductor shell is reduced.

[0018] 2. Annular grooves are arranged around the inner surface of the radiator, and sealing strips are installed in the annular grooves, so that the radiator and the upper cover are sealed, thereby improving the sealing between the radiator and the upper cover. A switching power board is arranged on one side of the power board to control the switching state of the inverter, thereby ensuring the normal operation of the inverter and the stability and safety of the output power. A display screen is connected to one side of the upper cover for real-time data viewing, and a back plate is arranged on the outer side of the radiator to fix the position of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional exploded schematic diagram of a single-phase photovoltaic grid-connected inverter;

[0020] Figure 2 This is an enlarged schematic diagram of part A of a single-phase photovoltaic grid-connected inverter;

[0021] Explanation of the reference numerals: 1. Radiator; 2. Inductor assembly; 3. Power board; 4. HMI board; 5. Upper cover; 6. Switching power board; 7. Arc fault control board; 8. Display screen; 9. Back panel. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-2 As shown, the single-phase photovoltaic grid-connected inverter of the utility model includes a radiator 1, an inductor component 2 is arranged on one side of the inner surface of the radiator 1 near the edge, a power board 3 is arranged on the side of the inductor component 2 away from the radiator 1, and an HMI board 4 is arranged on the side of the power board 3 away from the inductor component 2. An annular groove is arranged around the inner surface of the radiator 1, and a sealing strip is installed in the annular groove, so that the radiator 1 and the upper cover 5 are sealed to form a closed cavity, the inductor component 2 and the power board 3 are integrated on one side of the radiator 1, and the HMI board 4 is integrated on one side of the upper cover 5. The inductor component 2, the power board 3 and the HMI board 4 of the single-phase photovoltaic grid-connected inverter are all located inside the closed cavity, so that the cost of opening the mold of the inductor shell is reduced.

[0024] A switch power board 6 is provided on one side of the power board 3 to control the switch state of the inverter, thereby ensuring the normal operation of the inverter and the stability and safety of the output power. An arc fault control board 7 is provided on the other side of the power board 3.

[0025] A display screen 8 is connected to one side of the upper cover 5 , and the inner side of the display screen 8 is fixedly connected to a side of the HMI board 4 close to the upper cover 5 . The display screen 8 is used to view data in real time.

[0026] A back plate 9 is provided on the outer side of the heat sink 1 for fixing the position of the inverter.

[0027] The inductor component 2 in the single-phase photovoltaic grid-connected inverter plays a filtering role, and the current is smoothed by the energy storage and freewheeling of the inductor. The power board 3 is used to receive the generated DC power and match the voltage and current to ensure the stability and efficiency of the input power. The HMI board 4 monitors and visualizes important data of the production process, thereby improving the operating efficiency and reliability, optimizing the inductor arrangement structure of the single-phase photovoltaic grid-connected inverter, thereby greatly reducing the cost and reducing the weight of the inverter.

[0028] In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Single-phase photovoltaic grid-connected inverter, characterized in that: The invention comprises a heat sink (1), wherein an inductor component (2) is arranged on one side of the inner surface of the heat sink (1) near the edge, a power board (3) is arranged on the side of the inductor component (2) away from the heat sink (1), and an HMI board (4) is arranged on the side of the power board (3) away from the inductor component (2). The heat sink (1) is sealed with an upper cover (5) to form a closed cavity, wherein the inductor component (2) and the power board (3) are both integrated on one side of the heat sink (1), and the HMI board (4) is integrated on one side of the upper cover (5), and the inductor component (2), the power board (3) and the HMI board (4) are all located inside the closed cavity.

2. The single-phase photovoltaic grid-connected inverter according to claim 1, characterized in that: The inner surface of the radiator (1) is provided with an annular groove around its periphery, and a sealing strip is installed in the annular groove, so that the radiator (1) and the upper cover (5) are matched in a sealed manner.

3. The single-phase photovoltaic grid-connected inverter according to claim 1, characterized in that: A switch power supply board (6) is arranged on one side of the power board (3), and an arc fault control board (7) is arranged on the other side of the power board (3).

4. The single-phase photovoltaic grid-connected inverter according to claim 1, characterized in that: A display screen (8) is connected to one side of the upper cover (5), and the inner side of the display screen (8) is fixedly connected to a side of the HMI board (4) close to the upper cover (5).

5. The single-phase photovoltaic grid-connected inverter according to claim 1, characterized in that: A back plate (9) is provided on the outer side of the radiator (1).

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