Photovoltaic inverter

Abstract

The photovoltaic inverter comprises an inverter box body, a fan assembly and an inductance box, the fan assembly and the inductance box are arranged on the inverter box body, the fan assembly comprises a plurality of fans which are linearly arranged in the first direction, and the first direction is parallel to the length direction of the inverter box body; the inductor box is located at an air outlet of at least one fan, the length direction of the inductor box is parallel to the air outlet direction of the fan, the inductor box is arranged on the inverter box body and located at the air outlet of at least one fan, the inductor box comprises a box body and a heat dissipation assembly, and one side, close to the air outlet of the fan, of the box body is provided with a first air guide part; the first air guide part is obliquely arranged towards the fan; the first heat dissipation part extends from the first air guide part to the side part, far away from the inverter box body, of the box body, and the inclined first air guide part is arranged in the inverter box body, so that the possibility of vortex formation at the air outlet of the fan is reduced, air flow smoothly passes through the first heat dissipation part, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic inverter. Background Art

[0002] The inverter is a conversion device that converts the DC power generated by the power generation device into AC power that can be connected to the grid. The transistors, inductors and other electronic components in the inverter will generate a lot of heat during operation. This heat needs to be transferred to the atmosphere in time through heat dissipation devices such as radiators and inductor boxes to avoid failure of electronic components due to excessive temperature.

[0003] However, the inductor box of the prior art only considers the problem of simple mold box construction, and does not fully consider the problem of the impact on the heat dissipation airflow. The wall surface in the air intake direction is almost parallel to the airflow direction, and the airflow is almost blocked and cannot flow normally to the other end of the inductor box. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings, the purpose of the present application is to provide a photovoltaic inverter having a first air guide portion arranged obliquely, so as to reduce the possibility of vortex formation at the fan outlet, and allow the air flow to pass smoothly through the first heat dissipation portion, thereby improving the heat dissipation efficiency.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] A photovoltaic inverter, comprising: an inverter box;

[0007] A fan assembly is arranged on the inverter housing, comprising a plurality of fans, and the plurality of fans are arranged in a straight line along a first direction, wherein the first direction is parallel to a length direction of the inverter housing;

[0008] An inductor box is arranged on the inverter box body and is located at the air outlet of at least one of the fans, and the length direction of the inductor box is parallel to the air outlet direction of the fan. The inductor box includes a box body and a first heat dissipation portion.

[0009] A first air guide portion is provided on one side of the box body close to the air outlet of the fan, and the first air guide portion is arranged obliquely toward the fan;

[0010] The first heat dissipation portion extends from the first air guide portion to a side of the box body away from the inverter box.

[0011] In one embodiment, an included angle between the first air guide portion and a side of the box body away from the inverter box is between 100° and 120°.

[0012] In one embodiment, the wind guiding portion includes a wind guiding inclined surface.

[0013] In one embodiment, a second air guide portion is included, which is arranged on a side of the box body opposite to the first air guide portion.

[0014] The first heat dissipation portion extends from a side portion of the box body away from the inverter box to the second air guide portion.

[0015] In one embodiment, an angle between the first air guide portion and a side surface of the box body away from the inverter box is greater than or equal to an angle between the second air guide portion and a side surface of the box body away from the inverter box.

[0016] In one embodiment, the first heat dissipation portion includes a plurality of first fins arranged in parallel and at intervals, and a first heat dissipation duct is formed between two adjacent first fins.

[0017] In one embodiment, the inductor box further includes a second heat dissipation portion, and the second heat dissipation portion is located on two side portions of the inductor box that are oppositely arranged in the first direction;

[0018] The second heat dissipation portion includes a plurality of second fins arranged in parallel and at intervals, and each of the second fins is configured to extend along the height direction of the box body.

[0019] In one embodiment, the box body, the first heat dissipation portion and the second heat dissipation portion are an integrated structure.

[0020] In one embodiment, the box body is provided with a receiving cavity, and the receiving cavity is used to receive at least two inductors.

[0021] In one embodiment, a heat dissipation component is further included, which is arranged on the inverter housing and located at the air outlet side of the fan component.

[0022] The heat dissipation assembly includes a plurality of heat dissipation fins, which are arranged at intervals and parallel to the air outlet direction of the fan.

[0023] Beneficial Effects

[0024] In the present application, a first heat dissipation portion is provided on the box body of the inductor box, which is beneficial to exporting the heat of the inductor inside the box body and can rectify the airflow output by the fan. At the same time, a first air guide portion is provided on the side of the box body close to the fan outlet and is inclined toward the fan, which is beneficial to guiding the airflow output by the fan to the first heat dissipation portion, reducing the obstruction of the airflow by the side of the box body close to the fan outlet, and reducing the possibility of forming vortices for the fan outlet, so that the airflow output by the fan can smoothly pass through the first heat dissipation portion, thereby improving the heat dissipation efficiency. Furthermore, the present application provides an independent air duct and fan for the inductor box, and the first heat dissipation portion directly exports the hot air to the outside of the inductor box, thereby improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide an understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the content of the present application.

[0026] Figure 1 A schematic diagram of a partially disassembled photovoltaic inverter provided in an embodiment of the present application;

[0027] Figure 2 A cross-sectional schematic diagram of a photovoltaic inverter provided in an embodiment of the present application;

[0028] Figure 2a for Figure 2 A partial enlarged view of point a in the middle;

[0029] Figure 3 A schematic diagram of the structure of the inductor box provided in an embodiment of the present application;

[0030] Figure 4 A schematic cross-sectional view of an inductor box provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted as the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in conventional experiments.

[0032] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this article, "electrical connection" includes the situation where the constituent elements are connected together through an element with some electrical function. "Elements with some electrical function" are not particularly limited as long as they can transfer electrical signals between the connected constituent elements. "Elements with some electrical function" can be, for example, electrodes or wiring, or switching elements such as transistors, or other functional elements such as resistors, inductors or capacitors. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0033] In this application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0034] The present application discloses a photovoltaic inverter, which includes an inverter case and a fan assembly and an inductor box arranged on the inverter case, the fan assembly including a plurality of fans arranged in a straight line along a first direction; the first direction is parallel to the length direction of the inverter case, the inductor box is arranged on the inverter case and located at the air outlet of at least one fan, and the length direction of the inductor box is parallel to the air outlet direction of the fan, the inductor box includes a box body and a heat dissipation assembly, the box body has a first air guide portion on one side close to the air outlet of the fan, and the air guide portion is inclined toward the fan; the first heat dissipation portion extends from the first air guide portion to a side of the box body away from the inverter case, and the inclined first air guide portion is arranged in the present application to reduce the possibility of vortex formation at the fan outlet, so that the airflow passes smoothly through the first heat dissipation portion, thereby improving the heat dissipation efficiency.

[0035] Next join Figure 1-Figure 4 To describe a photovoltaic inverter provided in an embodiment of the present application.

[0036] The photovoltaic inverter has a first air guide portion that is arranged obliquely, thereby reducing the possibility of eddy currents being formed at the fan outlet, allowing the airflow to pass through the first heat dissipation portion smoothly, thereby improving heat dissipation efficiency.

[0037] The photovoltaic inverter includes an inverter case 10, a fan assembly 20 and an inductor box 30. The fan assembly 20 is arranged on the inverter case 10. The fan assembly 20 includes a plurality of fans 21, which are arranged in a straight line along a first direction, and the first direction is parallel to the length direction (X direction) of the inverter case; the inductor box 30 is arranged on the inverter case 10 and is located at the air outlet of at least one fan 21, and the length direction (Y direction) of the inductor box 30 is parallel to the air outlet direction of the fan. The inductor box 30 includes a box body 31 and a first heat dissipation portion 32. The box body 31 has a first air guide portion 311 on one side close to the air outlet of the fan 21, and the first air guide portion 311 is inclined toward the fan 21; the first heat dissipation portion 32 extends from the first air guide portion 311 to a side of the box body 31 away from the inverter case 00.

[0038] It should be noted that in the present application, by providing a first heat dissipation portion 32 on the box body 31 of the inductor box 30, it is beneficial to export the heat of the inductor 60 inside the box body 31 and to rectify the airflow output by the fan 21. At the same time, by providing a first air guide portion 311 inclined toward the fan 21 on the side of the box body 31 close to the air outlet of the fan 21, it is beneficial to guide the airflow output by the fan 21 to the first heat dissipation portion 32, thereby reducing the obstruction of the airflow on the side of the box body 31 close to the air outlet of the fan 21, and reducing the possibility of vortex formation for the air outlet of the fan 21, so that the airflow output by the fan 21 can pass smoothly through the first heat dissipation portion 32, thereby improving the heat dissipation efficiency. Furthermore, the present application provides an independent air duct and fan for the inductor box 30, and the first heat dissipation portion 32 directly exports the hot air to the outside of the inductor box 30, thereby improving the heat dissipation efficiency.

[0039] refer to Figure 4 In a specific embodiment, the angle a between the first air guide portion 311 and the side of the box body 31 away from the inverter box body 10 is between 100-120° (such as the angle is 100°, 110°, 120°). This design allows the airflow to be guided smoothly through the first heat dissipation portion on the box body 31, reducing the obstruction of the airflow by the side of the box body 31, and reducing the possibility of forming vortices for the air outlet of the fan 21, so that the airflow can smoothly pass through the first heat dissipation portion and the second heat dissipation portion, thereby improving the heat dissipation efficiency. Preferably, the angle a between the first air guide portion 311 and the side of the box body 31 away from the inverter box body 10 is 105°. Furthermore, the air guide portion may specifically include an air guide slope.

[0040] refer to Figure 3-Figure 4In a specific embodiment, the second air guide portion 312 is further included, and the second air guide portion 312 is arranged on a side of the box body 31 opposite to the first air guide portion 311. The first heat dissipation portion 32 extends from a side of the box body 31 away from the inverter box body 10 to the second air guide portion 312, that is, the first heat dissipation portion 32 is simultaneously arranged on the first air guide portion 311, a side of the box body 31 away from the inverter box body 10, and the second air guide portion 312. Further, in one case, the first air guide portion 311 and the second air guide portion 312 are arranged on the box body 31. The inductor box 31 is symmetrically arranged about the midline m, that is, the angle a between the first air guide portion 311 and the side surface of the box body 31 away from the inverter box body 10 is equal to the angle b between the second air guide portion 312 and the side surface of the box body 31 away from the inverter box body 10. In another case, the angle a between the first air guide portion 311 and the side surface of the box body 31 away from the inverter box body 10 is greater than the angle b between the second air guide portion 312 and the side surface of the box body 31 away from the inverter box body 10. This design further reduces the material usage of the entire inductor box and saves material costs.

[0041] refer to Figure 3 In a specific embodiment, the first heat dissipation portion 32 includes a plurality of first fins 321 arranged in parallel and spaced apart, and a first heat dissipation duct is formed between two adjacent first fins 321. The airflow blown out from the fan 21 flows through the inductor box 30 along the first heat dissipation duct, thereby cooling the inductor box 30.

[0042] refer to Figure 3 In a specific embodiment, the inductor box 30 further includes a second heat dissipation portion 33, which is located on two sides of the inductor box 30 that are relatively arranged in the first direction (X direction); the second heat dissipation portion 33 includes a plurality of second fins 331 that are arranged in parallel and spaced apart, and each second fin 331 is configured to extend along the height direction of the box body 31. By arranging the second fins 331, heat is dissipated from the two sides of the inductor box 30 that are relatively arranged in the width direction (Z direction), thereby conducting heat away from the inductor 60 inside the inductor box 30.

[0043] refer to Figure 2-Figure 3 In a specific embodiment, the box body 31, the first heat dissipation portion 32 and the second heat dissipation portion 33 are an integrated structure.

[0044] refer to Figure 2 and Figure 3 In a specific embodiment, the box body 31 is provided with a accommodating cavity (not marked in the drawings), and the accommodating cavity is used to accommodate at least two inductors 60. The box body 31 in the present application has an all-in-one structure, and at least two inductors 60 can be accommodated in the box body 31. Therefore, by providing a first air guide portion 311 on one side of the box body 31 close to the air outlet of the fan 21, the inductor in the box body can be effectively dissipated.

[0045] refer to Figure 1 and Figure 2 In a specific embodiment, the photovoltaic inverter includes a heat dissipation component 40, which is arranged on the inverter box 10 and located at the air outlet side of the fan component 20. The heat dissipation component 40 includes a plurality of heat sinks 41 (see Figure 2a ), the heat sink 41 is arranged at intervals and parallel to the air outlet direction of the fan 21, and a wind shield 50 is further provided on the side of the heat dissipation component 40 and the inductor box away from the inverter box 10. By providing the wind shield 50, the wind blown out by the fan component 20 can be guided to better flow through the heat dissipation component 40 and the inductor box 30.

[0046] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with the technology to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit of the present application shall be included in the protection scope of the present application.

Claims

1. A photovoltaic inverter, characterized in that: include: Inverter box; A fan assembly is arranged on the inverter housing, comprising a plurality of fans, and the plurality of fans are arranged in a straight line along a first direction, wherein the first direction is parallel to a length direction of the inverter housing; An inductor box is arranged on the inverter box body and is located at the air outlet of at least one of the fans, and the length direction of the inductor box is parallel to the air outlet direction of the fan. The inductor box includes a box body and a first heat dissipation portion. A first air guide portion is provided on one side of the box body close to the air outlet of the fan, and the first air guide portion is arranged obliquely toward the fan; The first heat dissipation portion extends from the first air guide portion to a side of the box body away from the inverter box.

2. The photovoltaic inverter according to claim 1, characterized in that: An included angle between the first air guide portion and a side of the box body away from the inverter box body is between 100° and 120°.

3. The photovoltaic inverter according to claim 1, characterized in that: The wind guiding portion includes a wind guiding inclined surface.

4. The photovoltaic inverter according to claim 1, characterized in that: comprising a second air guide portion, which is arranged on a side of the box body opposite to the first air guide portion, The first heat dissipation portion extends from a side portion of the box body away from the inverter box to the second air guide portion.

5. The photovoltaic inverter according to claim 4, characterized in that: An angle between the first air guide portion and a side surface of the box body away from the inverter box is greater than or equal to an angle between the second air guide portion and a side surface of the box body away from the inverter box.

6. The photovoltaic inverter according to claim 1, characterized in that: The first heat dissipation portion includes a plurality of first fins arranged in parallel and at intervals, and a first heat dissipation duct is formed between two adjacent first fins.

7. The photovoltaic inverter according to claim 1, characterized in that: The inductor box further includes a second heat dissipation portion, and the second heat dissipation portion is located on two side portions of the inductor box that are oppositely arranged in the first direction; The second heat dissipation portion includes a plurality of second fins arranged in parallel and at intervals, and each of the second fins is configured to extend along the height direction of the box body.

8. The photovoltaic inverter according to claim 7, characterized in that: The box body, the first heat dissipation part and the second heat dissipation part are an integrated structure.

9. The photovoltaic inverter according to claim 1, characterized in that: The box body is provided with a receiving cavity, and the receiving cavity is used to receive at least two inductors.

10. The photovoltaic inverter according to claim 1, characterized in that: It also includes a heat dissipation component, which is arranged on the inverter box and located at the air outlet side of the fan component. The heat dissipation assembly includes a plurality of heat dissipation fins, which are arranged at intervals and parallel to the air outlet direction of the fan.

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