Heat dissipation structure of photovoltaic inverter

Abstract

The utility model relates to the field of heat dissipation of photovoltaic inverters, and discloses a heat dissipation structure of a photovoltaic inverter, which is characterized by comprising a heat dissipation protection outer box and an active heat dissipation mechanism, the heat dissipation protection outer box comprises a box bottom plate, a box rear plate, a box top plate and box side plates. A box door plate is hinged to the front sides of the box side plates. A plurality of side heat dissipation holes are formed in the box side plates in a penetrating manner; the active heat dissipation mechanism comprises at least two parallel fixing plates and a plurality of small heat dissipation fans, the rear sides of the fixing plates are fixedly connected with the front side of the box rear plate, each small heat dissipation fan comprises a fan body, a bendable connecting rod and a mounting clamp, and one end of each mounting clamp is detachably connected to the front side of the corresponding fixing plate in a clamped mode. The other end of the mounting clamp is connected with one end of the bendable connecting rod, the other end of the bendable connecting rod is connected with the fan body, and the fan body is adjusted through the positions of the bendable connecting rod and the mounting clamp, so that the airflow acting direction of the fan body is aligned to the target heat dissipation electric device; the fixing plate is a net frame type plate body.

Description

Technical Field

[0001] The utility model relates to the field of heat dissipation of photovoltaic inverters, and more specifically, to a heat dissipation structure of a photovoltaic inverter. Background Art

[0002] A photovoltaic inverter, also known as a power conditioner, converts the variable DC voltage generated by photovoltaic solar panels into AC power at the mains frequency. Composed of a boost circuit and an inverter bridge circuit, a photovoltaic inverter can be used in commercial power transmission systems and off-grid power grids. It primarily consists of switching elements such as transistors, which repeatedly switch on and off to convert DC input into AC output.

[0003] During the actual operation of a photovoltaic inverter, various electrical components generate heat. If this heat cannot be dissipated promptly, the components can easily be damaged in a continuously high-temperature operating environment. To avoid this, heat dissipation holes are typically provided on the inverter's housing to facilitate natural heat dissipation. For higher heat dissipation requirements, fans are also installed within the inverter, corresponding to the heat dissipation holes or core electrical components. This actively induces airflow within the housing, improving the efficiency of air exchange between the inside and outside of the housing. However, with the upgrading of products, it is necessary to pursue more efficient and effective heat dissipation technologies. For example, the above-mentioned heat dissipation method, when using ordinary cooling fans, has a limited effective heat dissipation area. For relatively complex connection angles between electrical components, the cooling fan only actively exchanges air at the periphery. The heat in the angle between the electrical components is essentially dissipated by natural cooling and a very small amount of passive air circulation. Compared to the area directly blown by the fan, the heat dissipation efficiency is not as high. Therefore, existing ordinary cooling fans cannot effectively dissipate the heat of most electrical components within the photovoltaic inverter. Therefore, it is necessary to further upgrade the heat dissipation structure of the photovoltaic inverter. Utility Model Content

[0004] The purpose of the utility model is to provide a heat dissipation structure for a photovoltaic inverter, which can flexibly dissipate heat to multiple target positions, thereby greatly improving the heat dissipation efficiency.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: A heat dissipation structure of a photovoltaic inverter, comprising: a heat dissipation protection outer box, an active heat dissipation mechanism;

[0006] The heat dissipation protection outer box includes a box bottom plate, a box rear plate, a box top plate and two box side plates that are fixedly connected to each other, and a box door plate is hinged on the front side of one of the box side plates;

[0007] The side panels of the box are provided with a plurality of side heat dissipation holes;

[0008] The active heat dissipation mechanism includes at least two parallel fixing plates and a plurality of small heat dissipation fans, the rear side of the fixing plate is fixedly connected to the front side of the box rear plate, the small heat dissipation fan includes a fan body, a bendable connecting rod, and a mounting clip, one end of the mounting clip is detachably clamped to the front side of the fixing plate, the other end of the mounting clip is connected to one end of the bendable connecting rod, and the other end of the bendable connecting rod is connected to the fan body, the fan body is adjusted by the bending angle of the bendable connecting rod and the position of the mounting clip on the fixing plate, so that the airflow direction of the fan body is aligned with the target heat dissipation electrical component of the photovoltaic inverter;

[0009] The fixed plate is a grid-type plate.

[0010] As an optimal technical solution of the present invention, the active heat dissipation mechanism also includes a suspended mounting mesh plate, which is parallel to the rear plate of the box, and the rear side of the edge of the suspended mounting mesh plate is fixedly connected to the body of the fixed plate. The suspended mounting mesh plate is used to install electrical components of the photovoltaic inverter, and an airflow cavity is formed between the suspended mounting mesh plate and the rear plate of the box.

[0011] As a preferred technical solution of the present invention, the bendable connecting rod only supports the fan body and maintains the current bent state.

[0012] As a preferred technical solution of the present invention, threaded rods are respectively provided at both ends of the bendable connecting rod, and threaded sleeves matching the threaded rods are respectively provided on the mounting clamp and the fan body, and the bendable connecting rod and the mounting clamp, as well as the bendable connecting rod and the fan body are detachably connected through the threaded sleeves and the threaded rods respectively.

[0013] As a preferred technical solution of the present invention, a plurality of fan mounting holes are provided through the fixing plate, the fan mounting holes correspond to the positions of the side heat dissipation holes, and internal and external drainage fans are arranged in the fan mounting holes.

[0014] As a preferred technical solution of the present invention, a plurality of rear heat dissipation holes are provided through the rear plate of the box, and a plurality of bottom heat dissipation holes are even provided through the bottom plate of the box.

[0015] As a preferred technical solution of the present invention, dust-proof meshes are detachably attached to the outer sides of the box side panels at positions corresponding to the side heat dissipation holes, the rear side of the box rear panel at positions corresponding to the rear heat dissipation holes, and the bottom surface of the box bottom panel at positions corresponding to the bottom heat dissipation holes.

[0016] In summary, the present invention has the following beneficial effects: after the electrical components inside the actual photovoltaic inverter are installed, the mounting clips are clamped on the fixed plate according to the positions of the electrical components, and then the angle and shape of the bendable connecting rod are adjusted so that the airflow side of the fan body can be aligned with the target position; since the mounting clips in the active heat dissipation mechanism can be moved, the bendable connecting rod can be freely bent, thereby greatly increasing the target airflow range of the fan body, and focusing on the heat dissipation of the target electrical components, even at the angle position, the airflow arrangement can be focused. In actual application, as long as there is enough space in the heat dissipation protection box and enough position on the fixed plate, multiple target positions can be flexibly cooled, thereby greatly improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the box rear panel, box side panels and box bottom panel of the utility model;

[0019] Figure 3 It is a schematic diagram of the fixing plate of the present utility model;

[0020] Figure 4 It is a schematic diagram of the small heat dissipation fan of the present utility model.

[0021] In the figure: 1. Box bottom plate; 2. Box back plate; 3. Box side plate; 4. Box top plate; 5. Side heat dissipation holes; 6. Fixing plate; 7. Fan body; 8. Bendable connecting rod; 9. Mounting clamp; 10. Suspended mounting mesh plate; 11. Threaded sleeve; 12. Internal and external drainage fan; 13. Rear heat dissipation holes; 14. Bottom heat dissipation holes. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] like Figure 1-4 As shown, the utility model provides a heat dissipation structure of a photovoltaic inverter, comprising: a heat dissipation protection outer box, an active heat dissipation mechanism;

[0024] like Figure 2 As shown, the heat dissipation protection outer box includes a box bottom plate 1, a box rear plate 2, a box top plate 4 and two box side plates 3 that are fixedly connected to each other. The front side of one box side plate 3 is hinged with a box door plate, and a lock is provided between the box door plate and the front side of the other box side plate 3 to realize the locking and opening and closing control of the box door plate;

[0025] The side panels 3 of the box are provided with a number of side heat dissipation holes 5 for exchanging airflow inside and outside the box;

[0026] like Figure 4 As shown, the active heat dissipation mechanism includes at least two parallel fixed plates 6 and several small heat dissipation fans. The rear side of the fixed plate 6 is fixedly connected to the front side of the box rear plate 2. The heat dissipation fan includes a fan body 7, a bendable connecting rod 8, and a mounting clip 9. One end of the mounting clip 9 is detachably clamped on the front side of the fixed plate 6, and the other end of the mounting clip 9 is connected to one end of the bendable connecting rod 8. The other end of the bendable connecting rod 8 is connected to the fan body 7. The fan body 7 is adjusted by the bending angle of the bendable connecting rod 8 and the position of the mounting clip 9 on the fixed plate 6, so that the airflow direction of the fan body 7 is aligned with the target heat dissipation electrical device of the photovoltaic inverter; wherein the bendable connecting rod 8 can adjust the length and direction according to the position of the target heat dissipation electrical device, which is convenient for adjusting and controlling the airflow direction of the fan body 7.

[0027] In actual applications, the number of electrical components in a photovoltaic inverter is limited, so generally setting up six to eight small cooling fans can complete the airflow exchange inside and outside the entire box while acting on the target parts. In actual photovoltaic inverters, after the cooling fans are connected to the power supply, they will continue to be turned on until the equipment is repaired or shut down, ensuring that the heat dissipation work continues.

[0028] like Figure 3 As shown, the fixing plate 6 is a grid-type plate, which does not affect the passage of airflow and facilitates heat dissipation.

[0029] The working principle, use process and technical advantages of the heat dissipation structure of the present invention are as follows: after the electrical components inside the actual photovoltaic inverter are installed, the mounting clip 9 is clamped on the fixed plate 6 according to the positions between the various electrical components, and then the angle and shape of the bendable connecting rod 8 are adjusted so that the airflow side of the fan body 7 can be aligned with the target position; since the mounting clip 9 in the active heat dissipation mechanism can be moved, the bendable connecting rod 8 can be freely bent, so that the target airflow range of the fan body 7 can be greatly increased, and the heat dissipation effect can be focused on the target electrical components, and the airflow arrangement can be focused even at the angle position. In actual application, as long as the space in the heat dissipation protection outer box is sufficient and the position on the fixed plate 6 is sufficient, multiple target positions can be flexibly cooled, thereby greatly improving the heat dissipation efficiency.

[0030] As an embodiment of the present invention, the active heat dissipation mechanism also includes a suspended mounting mesh panel 10, which is parallel to the rear plate 2 of the box. The rear side of the edge of the suspended mounting mesh panel 10 is fixedly connected to the body of the fixed plate 6. The suspended mounting mesh panel 10 is used to install electrical components of the photovoltaic inverter. An air flow cavity is formed between the suspended mounting mesh panel 10 and the rear plate 2 of the box. Through the suspended mounting mesh panel 10, the rear sides of the electrical components of the photovoltaic inverter can be hollowed out and can directly contact the air flow cavity, so that the rear of the electrical components can also dissipate heat quickly.

[0031] Specifically, a plurality of fan mounting holes are provided through the fixing plate 6, and the positions of the fan mounting holes correspond to the side heat dissipation holes 5. Internal and external drainage fans 12 are arranged in the fan mounting holes, which can enhance the air exchange efficiency inside and outside the box, thereby making the heat dissipation efficiency higher.

[0032] There are a number of rear heat dissipation holes 13 running through the rear panel 2 of the box, and there are even a number of bottom heat dissipation holes 14 running through the bottom panel 1 of the box, which increase the range of the air circulation channel, thereby achieving a better air flow exchange effect.

[0033] As an embodiment of the present invention, the bendable connecting rod 8 maintains its current bent state when only supporting the fan body 7. That is, in actual application, after the position of the fan body 7 is adjusted, its position can be maintained to ensure that the airflow action position remains unchanged.

[0034] Threaded rods are provided at both ends of the bendable connecting rod 8, and threaded sleeves 11 matching the threaded rods are provided on the mounting clamp 9 and the fan body 7. The bendable connecting rod 8 and the mounting clamp 9, as well as the bendable connecting rod 8 and the fan body 7 are detachably connected through the threaded sleeves 11 and the threaded rods, respectively. It is convenient to select the bendable connecting rod 8 of corresponding length according to the size of the actual internal space of the heat dissipation protection outer box and the actual position where the fan body 7 is to be arranged, so as to facilitate better heat dissipation arrangement.

[0035] As an embodiment of the present invention, dust-proof meshes are detachably attached to the outer sides of the box side panels 3 at positions corresponding to the side heat dissipation holes 5, the rear side of the box rear panel 2 at positions corresponding to the rear heat dissipation holes 13, and the bottom surface of the box bottom panel 1 at positions corresponding to the bottom heat dissipation holes 14, respectively. These meshes can prevent external dust and insects from entering, and are also convenient for disassembly and replacement when a lot of dust is intercepted, thereby ensuring smooth airflow.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heat dissipation structure for a photovoltaic inverter, characterized by: include: Heat dissipation protection outer box, active heat dissipation mechanism; The heat dissipation protection outer box comprises a box bottom plate (1), a box rear plate (2), a box top plate (4) and two box side plates (3) that are fixedly connected to each other, and a box door plate is hinged on the front side of one of the box side plates (3); The box side plate (3) is provided with a plurality of side heat dissipation holes (5); The active heat dissipation mechanism comprises at least two parallel fixed plates (6) and a plurality of small heat dissipation fans, the rear side of the fixed plate (6) is fixedly connected to the front side of the box rear plate (2), the small heat dissipation fan comprises a fan body (7), a bendable connecting rod (8), and a mounting clamp (9), one end of the mounting clamp (9) is detachably clamped to the front side of the fixed plate (6), the other end of the mounting clamp (9) is connected to one end of the bendable connecting rod (8), and the other end of the bendable connecting rod (8) is connected to the fan body (7), and the fan body (7) is adjusted by the bending angle of the bendable connecting rod (8) and the position of the mounting clamp (9) on the fixed plate (6), so that the airflow action direction of the fan body (7) is aligned with the target heat dissipation electrical device of the photovoltaic inverter; The fixed plate (6) is a grid-type plate.

2. The heat dissipation structure of a photovoltaic inverter according to claim 1, characterized in that: The active heat dissipation mechanism further comprises a suspended mounting mesh plate (10), the suspended mounting mesh plate (10) being parallel to the box rear plate (2), the rear side of the edge of the suspended mounting mesh plate (10) being fixedly connected to the plate body of the fixed plate (6), the suspended mounting mesh plate (10) being used to mount electrical components of the photovoltaic inverter, and an airflow cavity being formed between the suspended mounting mesh plate (10) and the box rear plate (2).

3. The heat dissipation structure of a photovoltaic inverter according to claim 2, characterized in that: The bendable connecting rod (8) only supports the fan body (7) and maintains the current bent state.

4. The heat dissipation structure of a photovoltaic inverter according to claim 3, characterized in that: Threaded rods are respectively provided at both ends of the bendable connecting rod (8); threaded sleeves (11) matching the threaded rods are respectively provided on the mounting clamp (9) and the fan body (7); the bendable connecting rod (8) and the mounting clamp (9), and the bendable connecting rod (8) and the fan body (7) are detachably connected via the threaded sleeves (11) and the threaded rods, respectively.

5. The heat dissipation structure of a photovoltaic inverter according to claim 4, characterized in that: The fixing plate (6) is provided with a plurality of fan mounting holes, the positions of the fan mounting holes corresponding to the side heat dissipation holes (5), and internal and external drainage fans (12) are arranged in the fan mounting holes.

6. The heat dissipation structure of a photovoltaic inverter according to claim 5, characterized in that: The box rear plate (2) is provided with a plurality of rear heat dissipation holes (13) penetrating therethrough, and the box bottom plate (1) is even provided with a plurality of bottom heat dissipation holes (14) penetrating therethrough.

7. The heat dissipation structure of a photovoltaic inverter according to claim 6, characterized in that: Dust-proof screens are detachably attached to the outer sides of the box side panels (3) at positions corresponding to the side heat dissipation holes (5), the rear side of the box rear panel (2) at positions corresponding to the rear heat dissipation holes (13), and the bottom surface of the box bottom panel (1) at positions corresponding to the bottom heat dissipation holes (14).

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