Heat dissipation structure for photovoltaic inverter

Abstract

The invention provides a heat dissipation structure for a photovoltaic inverter, and the structure comprises a heat dissipation fan assembly disposed in a photovoltaic inverter body, the heat dissipation fan assembly is located between an air inlet and an air outlet, and the heat dissipation fan assembly, the air inlet and the air outlet form a heat dissipation channel which is used for discharging heat in a housing of the photovoltaic inverter body. The heat dissipation fan assembly comprises two installation seats installed in the photovoltaic inverter body shell, a supporting piece is arranged between the two installation seats, an impeller is rotationally connected between the two installation seats, a driving motor is installed on the face, away from the impeller, of one installation seat, the driving motor is connected with one end of the impeller, and the other end of the impeller is connected with the supporting piece. An air channel is formed between the supporting piece and the two mounting bases, the impeller is located in the air channel, and the driving motor is located outside the air channel. Dust carried by wind power does not pass through the driving motor, damage of the dust to the driving motor is reduced, and therefore the motor which is lower in cost and simpler in design can be selected as the driving motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic inverter heat dissipation, in particular to a heat dissipation structure for photovoltaic inverter. BACKGROUND

[0002] In the photovoltaic power generation system, the photovoltaic inverter as the core component, its role is to convert the direct current generated by photovoltaic module into alternating current, for power grid use or direct power supply for load; The heat dissipation structure commonly used in the prior art photovoltaic inverter adopts axial flow fan for air cooling, and the traditional axial flow fan design usually sets the motor channel in the air duct, that is, the motor and the impeller are in the channel of air flow together. Since the wind force will carry the dust in the environment during the flow process, the dust will pass through the motor with the airflow. In order to deal with the influence of dust on the motor, the prior art has to use a higher dustproof grade motor, which increases the cost of the motor. Therefore, we make improvements and propose a heat dissipation structure for photovoltaic inverter. SUMMARY

[0003] The present application provides a heat dissipation structure for photovoltaic inverter, the shell of the photovoltaic inverter body is provided with an air inlet and an air outlet, comprising a heat dissipation fan assembly installed in the photovoltaic inverter body, the heat dissipation fan assembly is located between the air inlet and the air outlet, and the heat dissipation fan assembly and the air inlet and the air outlet form a heat dissipation channel for discharging heat in the shell of the photovoltaic inverter body; the heat dissipation fan assembly comprises two mounting seats installed in the shell of the photovoltaic inverter body, a support is arranged between the two mounting seats, and an impeller is rotatably connected between the two mounting seats, one side of one of the mounting seats away from the impeller is provided with a driving motor, the driving motor is connected with one end of the impeller, the support and the two mounting seats form an air duct, the impeller is located in the air duct, and the driving motor is located outside the air duct.

[0004] As a preferred technical solution of the present application, the two ends of the impeller are rotatably connected with the two mounting seats through bearings.

[0005] As a preferred technical solution of the present application, the driving motor is installed on the mounting seat through bolts, and the output shaft of the driving motor and one end of the impeller are connected through a shaft coupling.

[0006] As a preferred technical solution of the present application, the support comprises a first connecting plate and a second connecting plate connected between the two mounting seats, the second connecting plate is arranged in an L shape, and the air duct formed between the mounting seat, the first connecting plate and the second connecting plate is an L-shaped air duct.

[0007] As a preferred technical solution of the present application, the air inlet end of the L-shaped air duct is close to the air inlet, and the air outlet end of the L-shaped air duct is close to the air outlet.

[0008] As a preferred technical solution of this application, the corner of the second connecting plate is arc-shaped.

[0009] As a preferred technical solution of this application, the support includes a third connecting plate and a fourth connecting plate connected between two mounting seats, and the air duct formed between the mounting seats, the third connecting plate and the fourth connecting plate is a straight air duct.

[0010] As a preferred technical solution of this application, the air inlet end of the straight air duct is close to the air inlet, and the air outlet end of the straight air duct is close to the air outlet.

[0011] As a preferred technical solution in this application, the photovoltaic inverter body is also provided with mounting holes.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: This application uses a cooling fan assembly with the drive motor located outside the air duct and the impeller located inside the air duct. This design prevents dust carried by the wind from passing through the drive motor, reducing the damage caused by dust to the drive motor. Therefore, a lower-cost and simpler motor can be selected for the drive motor. Since the wind does not pass through the drive motor, noise can be reduced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of one embodiment of the heat dissipation structure for a photovoltaic inverter provided in this application; Figure 2 This is a schematic diagram of the internal structure of the photovoltaic inverter body provided in this application; Figure 3 A schematic diagram of the structure of the second connecting plate provided in this application; Figure 4 A schematic diagram of the L-shaped air duct provided in this application; Figure 5 A schematic diagram of another embodiment of the heat dissipation structure for a photovoltaic inverter provided in this application; Figure 6 This is a schematic diagram of another internal structure of the photovoltaic inverter body provided in this application; Figure 7 A structural schematic diagram of the fourth connecting plate provided in this application; Figure 8 A schematic diagram of the straight air duct provided in this application.

[0014] The image shows: 1. Photovoltaic inverter body; 101. Air inlet; 102. Air outlet; 103. Mounting hole; 2. Cooling fan assembly; 201. Mounting base; 202. First connecting plate; 203. Second connecting plate; 204. Drive motor; 205. Impeller; 206. Third connecting plate; 207. Fourth connecting plate. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0016] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] Example 1, please refer to Figures 1-8 A heat dissipation structure for a photovoltaic inverter is disclosed. The photovoltaic inverter body 1 has an air inlet 101 and an air outlet 102 on its housing. The photovoltaic inverter body 1 also has mounting holes 103. A heat dissipation fan assembly 2 is installed inside the photovoltaic inverter body 1, located between the air inlet 101 and the air outlet 102. The heat dissipation fan assembly 2, together with the air inlet 101 and the air outlet 102, forms a heat dissipation channel to expel heat from the photovoltaic inverter body 1 housing. The heat dissipation fan assembly 2 includes two mounting bases 201 installed inside the photovoltaic inverter body 1 housing. The mounting bases 201 are bolted to the photovoltaic inverter. Inside the housing of the main body 1, a support is provided between two mounting bases 201, and an impeller 205 is rotatably connected between the two mounting bases 201. A drive motor 204 is mounted on the side of one of the mounting bases 201 away from the impeller 205. The drive motor 204 is connected to one end of the impeller 205. An air duct is formed between the support and the two mounting bases 201. The impeller 205 is located inside the air duct, and the drive motor 204 is located outside the air duct. This design prevents dust carried by the wind from passing through the drive motor 204, reducing the damage of dust to the drive motor 204. Therefore, the drive motor 204 can be a lower-cost and simpler-designed motor. Since the wind does not pass through the drive motor, noise can be reduced. In the prior art, the motor is located inside the air duct, and the wind directly impacts the motor and the vibration generated by the motor interacts with the wind, which will produce a lot of noise. However, in this application, the drive motor 204 is located outside the air duct, and the wind does not pass through the drive motor 204, which reduces the direct impact of the wind on the drive motor 204 and the interaction with the wind, thereby reducing the generation of noise.

[0019] Furthermore, the two ends of the impeller 205 are rotatably connected to the two mounting seats 201 by bearings respectively. The drive motor 204 is mounted on the mounting seat 201 by bolts, and the output shaft of the drive motor 204 is connected to one end of the impeller 205 by a coupling. The drive motor 204 is used to drive the impeller 205 to rotate.

[0020] Example 2 further optimizes the heat dissipation structure for photovoltaic inverters provided in Example 1, specifically, as follows: Figures 1-4 As shown, the support includes a first connecting plate 202 and a second connecting plate 203 connected between two mounting bases 201. The second connecting plate 203 is L-shaped, and the air duct formed between the mounting bases 201, the first connecting plate 202, and the second connecting plate 203 is an L-shaped air duct. The first connecting plate 202 and the second connecting plate 203 are connected to the mounting bases 201 by bolts. The L-shaped air duct allows the air outlet direction to be located on the front or back of the photovoltaic inverter body 1. Figure 1 and Figure 2 The air outlet direction shown is at the front. The specific direction can be set according to the actual situation. If there is an object blocking the back of the photovoltaic inverter body 1, it can be set at the front. If there is no obstruction, it can be set at the front or the back.

[0021] Furthermore, the air inlet end of the L-shaped air duct is close to the air inlet 101, and the air outlet end of the L-shaped air duct is close to the air outlet 102.

[0022] Furthermore, the corner of the second connecting plate 203 is arc-shaped, so that an arc is also formed at the corner of the L-shaped air duct, which facilitates the flow of air.

[0023] In use, the drive motor 204 drives the impeller 205 to rotate to generate airflow. The air enters through the inlet 101, passes above the impeller 205, enters through the top of the L-shaped air duct, and then exits through the side of the L-shaped air duct and is discharged through the outlet 102.

[0024] Example 3 further optimizes the heat dissipation structure for photovoltaic inverters provided in Example 1, specifically, as follows: Figures 5-8As shown, the support includes a third connecting plate 206 and a fourth connecting plate 207 connected between two mounting bases 201. The air duct formed between the mounting bases 201, the third connecting plate 206, and the fourth connecting plate 207 is a straight air duct, i.e. Figure 8 As shown, the air outlet direction is downward, and the mounting base 201, the third connecting plate 206, and the fourth connecting plate 207 are fixed together with bolts.

[0025] Furthermore, the air inlet end of the straight air duct is close to the air inlet 101, and the air outlet end of the straight air duct is close to the air outlet 102.

[0026] The dust prevention methods at the air inlet 101 and air outlet 102 are existing technologies, such as adding filters.

[0027] In use, the drive motor 204 drives the impeller 205 to rotate to generate airflow. The air enters through the top of the straight air duct from the inlet 101, passes above the impeller 205, and then exits through the bottom of the straight air duct and is discharged from the outlet 102.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A heat dissipation structure for a photovoltaic inverter, wherein the housing of the photovoltaic inverter body (1) is provided with an air inlet (101) and an air outlet (102), characterized in that, The device includes a heat dissipation fan assembly (2) installed inside the photovoltaic inverter body (1). The heat dissipation fan assembly (2) is located between the air inlet (101) and the air outlet (102), and the heat dissipation fan assembly (2), the air inlet (101) and the air outlet (102) form a heat dissipation channel to dissipate heat from the housing of the photovoltaic inverter body (1). The heat dissipation fan assembly (2) includes two mounting seats (201) installed inside the housing of the photovoltaic inverter body (1). A support is provided between the two mounting seats (201), and an impeller (205) is rotatably connected between the two mounting seats (201). A drive motor (204) is installed on the side of one of the mounting seats (201) away from the impeller (205). The drive motor (204) is connected to one end of the impeller (205). An air duct is formed between the support and the two mounting seats (201). The impeller (205) is located inside the air duct, and the drive motor (204) is located outside the air duct.

2. The heat dissipation structure for a photovoltaic inverter according to claim 1, characterized in that, The two ends of the impeller (205) are rotatably connected to two mounting bases (201) via bearings.

3. The heat dissipation structure for a photovoltaic inverter according to claim 1, characterized in that, The drive motor (204) is bolted to the mounting base (201), and the output shaft of the drive motor (204) is connected to one end of the impeller (205) by a coupling.

4. The heat dissipation structure for a photovoltaic inverter according to any one of claims 1-3, characterized in that, The support includes a first connecting plate (202) and a second connecting plate (203) connected between two mounting bases (201). The second connecting plate (203) is L-shaped, and the air duct formed between the mounting base (201), the first connecting plate (202) and the second connecting plate (203) is an L-shaped air duct.

5. The heat dissipation structure for a photovoltaic inverter according to claim 4, characterized in that, The air inlet end of the L-shaped air duct is close to the air inlet (101), and the air outlet end of the L-shaped air duct is close to the air outlet (102).

6. The heat dissipation structure for a photovoltaic inverter according to claim 5, characterized in that, The corner of the second connecting plate (203) is arc-shaped.

7. The heat dissipation structure for a photovoltaic inverter according to any one of claims 1-3, characterized in that, The support includes a third connecting plate (206) and a fourth connecting plate (207) connected between two mounting bases (201), and the air duct formed between the mounting bases (201), the third connecting plate (206) and the fourth connecting plate (207) is a straight air duct.

8. The heat dissipation structure for a photovoltaic inverter according to claim 7, characterized in that, The air inlet end of the straight air duct is close to the air inlet (101), and the air outlet end of the straight air duct is close to the air outlet (102).

9. The heat dissipation structure for a photovoltaic inverter according to claim 1, characterized in that, The photovoltaic inverter body (1) is also provided with mounting holes (103).

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