Photovoltaic inverter

Abstract

The utility model provides a photovoltaic inverter, which comprises a box body, a first air duct arranged in the box body, a second air duct arranged in the box body, at least one first fan, heat dissipation fins and a first inductor, the first fan, the heat dissipation fins and the first inductor are all arranged in the first air duct, and the first fan is used for cooling the heat dissipation fins and the first inductor; the air conditioner further comprises at least one second fan and a second inductor, the second fan and the second inductor are both arranged in the second air channel, and the second fan is used for cooling the second inductor. According to the scheme, the two sets of independent air channels are arranged, the corresponding fans are arranged in each set of air channels, the inversion inductors are arranged in one set of air channels, the cooling fins and the large boost inductors are arranged in the other set of air channels, and the independent air cooling channels and the fans are arranged for the inversion inductors with large heat productivity; and meanwhile, the large boost inductor and the heat dissipation fins are placed in a group of heat dissipation air channels for heat dissipation, so that the overall heat dissipation efficiency of the photovoltaic inverter is improved.

Description

Technical Field

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

[0002] Inverters are widely used as equipment in the photovoltaic power generation industry. The existing fans in photovoltaic inverters only perform air cooling on the heat dissipation fins. There are unreasonable parts in the internal structure layout of the photovoltaic inverter. No corresponding air cooling treatment is carried out for the inverter inductance, resulting in the inability of the inverter inductance with large heat generation to dissipate heat in time, and the heat dissipation efficiency is low. Content of the Utility Model

[0003] The purpose of the utility model is to provide a photovoltaic inverter to solve the problem of low heat dissipation efficiency caused by the unreasonable internal structure layout of the existing photovoltaic inverter.

[0004] To achieve the above purpose, the following technical solutions are provided in the utility model:

[0005] The utility model provides a photovoltaic inverter, including:

[0006] A box body,

[0007] A first air duct arranged in the box body and a second air duct arranged in the box body,

[0008] Heat dissipation fins, a first inductor and at least one first fan, wherein,

[0009] The first fan, the heat dissipation fins and the first inductor are all arranged in the first air duct, and the first fan is used to cool the heat dissipation fins and the first inductor;

[0010] It further includes at least one second fan and a second inductor, wherein,

[0011] The second fan and the second inductor are both arranged in the second air duct, and the second fan is used to cool the second inductor.

[0012] Further, it further includes a third inductor, and the third inductor is arranged in the box body and is not located in the first air duct and the second air duct.

[0013] Further, the first inductor includes a first boost inductor, the second inductor includes an inverter inductor, and the third inductor includes a second boost inductor.

[0014] Further, the first fan is arranged on the upstream side of the first air duct, the heat dissipation fins are close to the first fan, and the first inductor is close to the heat dissipation fins.

[0015] Further, the second fan is arranged on the upstream side of the second air duct.

[0016] Further, the box body includes a mounting plate and a wind shield. The first air duct and the second air duct are located in the internal area formed by the mounting plate and the wind shield. A duct partition is provided on the wind shield. The first air duct is located on the first side of the duct partition, and the second air duct is located on the second side of the duct partition.

[0017] Further, it further includes a housing. An openable cover plate is provided on the housing. The first fan and the second fan are both arranged in the housing.

[0018] Further, the housing further includes a housing base. The housing base is hinged to the cover plate. The first fan and the second fan are arranged in the internal area formed by the cover plate and the housing base.

[0019] Further, it further includes screws. The end of the wind shield is detachably connected to the housing through the screws.

[0020] The advantages of the present utility model are as follows: The photovoltaic inverter designed by the present utility model is provided with two sets of separate air ducts, and corresponding fans are arranged in each air duct. An inverter inductor is placed in one air duct, and heat dissipation fins and a large boost inductor are placed in the other air duct. A separate air-cooling channel and fan are provided for the inverter inductor with relatively large heat generation. At the same time, the large boost inductor and the heat dissipation fins are placed in a group of heat dissipation air ducts for heat dissipation. Through the reasonable structural layout inside the photovoltaic inverter and the dual-air-duct design, the overall heat dissipation efficiency of the photovoltaic inverter is improved. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a layout diagram of the internal structure of a traditional photovoltaic inverter.

[0023] Figure 2 It is a layout diagram of the internal structure of the photovoltaic inverter in an embodiment of the present utility model.

[0024] Figure 3 It is a disassembled schematic diagram of the structure of the photovoltaic inverter in an embodiment of the present utility model.

[0025] Figure 4 It is a schematic diagram of the structure of the fan module in an embodiment of the present utility model.

[0026] The components in the figures are represented as follows:

[0027] 1. Heat dissipation fin; 2. Boost inductor; 3. Inverter inductor; 4. Fan; 5. First air duct; 6. Second air duct; 21. Large boost inductor; 22. Small boost inductor; 7. Mounting plate; 8. Air isolation cover; 9. Air duct partition; 10. Housing; 101. Cover plate; 102. Housing base; 41. First fan; 42. Second fan. Detailed implementation manners

[0028] The preferred embodiments of the present utility model are introduced below with reference to the accompanying drawings of the specification, demonstrating that the present utility model can be implemented. The embodiments of the present utility model can fully introduce the present utility model to those skilled in the art, making its technical content clearer and easier to understand. The present utility model can be embodied in many different forms of utility model embodiments, and the protection scope of the present utility model is not limited to the embodiments mentioned in the text.

[0029] In the drawings, components with the same structure are denoted by the same reference numerals, and components with similar structures or functions are denoted by similar reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present utility model does not limit the size and thickness of each component. To make the drawings clearer, the thickness of some components is appropriately exaggerated in the drawings.

[0030] In addition, the following descriptions of the embodiments of the present utility model refer to the additional drawings, which are used to illustrate specific utility model embodiments in which the present utility model can be implemented. The directional terms mentioned in the present utility model, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are only references to the directions in the additional drawings. Therefore, the directional terms used are for better and clearer illustration and understanding of the present utility model, 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 thus cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] When some components are described as "on" another component, the component can be directly placed on the other component; there can also be an intermediate component, the component is placed on the intermediate component, and the intermediate component is placed on another component. When a component is described as "mounted to" or "connected to" another component, the two can be understood as directly "mounted" or "connected", or a component is indirectly "mounted to" or "connected to" another component through an intermediate component.

[0032] Overview

[0033] As described in the background art, as Figure 1As shown, in the existing internal structure layout of a photovoltaic inverter, there is only one set of air-cooling channels inside the inverter. The fan 4 of the air-cooling channel faces the heat dissipation fins 1. The heat dissipation fins 1 are installed on the power board. The boost inductor 2 is located on one side of the edge and has no air-cooling structure. The inverter inductor 3 is arranged at the air intake of the front end of the fan 4. When the inverter inductor 3 operates, it will generate a large amount of heat. This structure will cause the fan 4 to inhale the high-temperature hot air heated by the inverter inductor 3 during the operation of the inverter, thereby reducing the cooling effect of the fan 4 on the heat dissipation fins 1 and also affecting the service life of the fan 4.

[0034] In view of the above problems, the inventor has improved the internal structure layout of the photovoltaic inverter, set two separate air ducts, and a corresponding fan 4 is arranged in each air duct. One group is used to cool the inverter inductor 3, and the other group is used to cool the heat dissipation fins 1 and the large boost inductor 21. Through such a design, the electronic devices with large heat generation during operation are cooled / dissipated (such as cooling / dissipating the inverter inductor 3 and the large boost inductor 21), thereby improving the overall heat dissipation efficiency of the photovoltaic inverter.

[0035] Based on the above concept, the present application will be described exemplarily in conjunction with the accompanying drawings below.

[0036] Exemplary structure

[0037] This embodiment provides a photovoltaic inverter, as Figure 2 shown, the photovoltaic inverter includes:

[0038] The first air duct 5 and the second air duct 6 opened in the inverter box body, wherein:

[0039] A first fan 41 is arranged in the first air duct 5. The first fan 41 is located at the air intake of the end of the first air duct 5. At the same time, the heat dissipation fins 1 and the large boost inductor 21 are arranged in sequence in the first air duct 5. The air flow generated by the first fan 41 first performs air-cooling treatment on the heat dissipation fins 1, and the large boost inductor 21 is close to the air outlet of the first air duct 5. The heat generated by the large boost inductor 21 can be directly taken away by the air flow generated by the first fan 41, so as to realize the function of simultaneously performing air-cooling treatment on the heat dissipation fins 1 and the large boost inductor 21.

[0040] A second fan 42 is arranged in the second air duct 6. The second fan 42 is located at the air intake of the end of the second air duct 6. Multiple inverter inductors 3 are arranged in a straight line in the second air duct 6. The air flow generated by the second fan 42 can perform air-cooling treatment on the inverter inductors 3, thereby improving the heat dissipation efficiency of the air-cooled inductors.

[0041] In some embodiments, as Figure 2As shown in the figure, a small step-up inductor 22 is arranged in the space of the inverter box away from the second air duct 6. Since the heat generated by the small step-up inductor 22 is not large, a separate air-cooling structure does not need to be designed. It only needs to keep the small step-up inductor 22 away from the inverter inductor 3 with a larger heat generation, and the small step-up inductor 22 can dissipate heat by itself.

[0042] It should be noted that the number of the first fan 41 and the second fan 42 can be one or more, and multiple fans 4 are arranged side by side in a straight line at the air inlet.

[0043] In some embodiments, as Figure 3 shown, the box body includes a mounting plate 7 and a wind isolation cover 8. The first air duct 5 and the second air duct 6 are located in the internal area formed by the mounting plate 7 and the wind isolation cover 8. A duct partition 9 is arranged on the wind isolation cover 8. The first air duct 5 is located on one side of the duct partition 9, and the second air duct 6 is located on the other side of the duct partition 9. The internal area formed by the mounting plate 7 and the wind isolation cover 8 is divided into the first air duct 5 and the second air duct 6 by the duct partition 9.

[0044] In some embodiments, as Figure 4 shown, the first fan 41 and the second fan 42 in the photovoltaic inverter can form an entire fan module. The fan module includes a housing 10. An openable cover plate 101 is arranged on the housing 10. The first fan 41 and the second fan 42 are arranged in a row in the housing 10. In the inverter, the fan is a vulnerable part and needs to be maintained or replaced regularly. This structure can facilitate the disassembly of the fan. Only by opening the cover plate 101 on the housing 10 can the fan be disassembled, and there is no need to additionally remove the wind isolation cover 8 and the inverter housing.

[0045] In addition, as Figure 4 shown, the housing 10 further includes a housing base 102. The housing base 102 is hinged to the cover plate 101. When the fan needs to be disassembled, the cover plate 101 can be turned over.

[0046] The end of the wind isolation cover 8 is connected to the housing 10 of the fan module by screws. Only by disassembling the screws can the entire fan module be removed from the inverter.

[0047] Although the present invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed, as long as they do not depart from the spirit and scope of the present invention defined by the appended claims. It should be understood that the different dependent claims and the features described herein can be combined in a manner different from that described in the original claims. It should also be understood that the features described in connection with a single embodiment can be used in other described embodiments.

Claims

1. A photovoltaic inverter, characterized in that, Comprising: A box body, A first air duct provided inside the box body and a second air duct provided inside the box body, Heat dissipation fins, a first inductor and at least one first fan, wherein, The first fan, the heat dissipation fins and the first inductor are all arranged in the first air duct, and the first fan is used for cooling the heat dissipation fins and the first inductor; It further comprises at least one second fan and a second inductor, wherein, The second fan and the second inductor are both arranged in the second air duct, and the second fan is used for cooling the second inductor, The first fan is arranged on the upstream side of the first air duct, the heat dissipation fins are close to the first fan, and the first inductor is close to the heat dissipation fins; The second fan is arranged on the upstream side of the second air duct.

2. The photovoltaic inverter according to claim 1, characterized in that, It further comprises a third inductor, and the third inductor is arranged inside the box body and is not located in the first air duct and the second air duct.

3. The photovoltaic inverter according to claim 2, characterized in that, The first inductor includes a first boost inductor, the second inductor includes an inverter inductor, and the third inductor includes a second boost inductor.

4. The photovoltaic inverter according to claim 1, characterized in that, The box body includes a mounting plate and a wind shield, the first air duct and the second air duct are located in the internal area formed by the mounting plate and the wind shield, a duct partition is provided on the wind shield, the first air duct is located on the first side of the duct partition, and the second air duct is located on the second side of the duct partition.

5. The photovoltaic inverter according to claim 4, characterized in that, It further comprises a housing, an openable cover plate is provided on the housing, and the first fan and the second fan are both arranged inside the housing.

6. The photovoltaic inverter according to claim 5, characterized in that, The housing further includes a housing base, the housing base is hinged to the cover plate, and the first fan and the second fan are arranged in the internal area formed by the cover plate and the housing base.

7. The photovoltaic inverter according to claim 5, characterized in that, It further comprises screws, and the end of the wind shield is detachably connected to the housing through the screws.

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