CN219478393U

CN219478393U - Miniature photovoltaic inverter

Info

Publication number: CN219478393U
Application number: CN202223327853.5U
Authority: CN
Inventors: 乐伟泽; 夏金锁
Original assignee: NINGBO DEYE FREQUENCY CONVERSION TECHNOLOGY CO LTD
Current assignee: NINGBO DEYE FREQUENCY CONVERSION TECHNOLOGY CO LTD
Priority date: 2022-12-10
Filing date: 2022-12-10
Publication date: 2023-08-04
Anticipated expiration: 2032-12-10

Abstract

The miniature photovoltaic inverter comprises a shell, a cover plate and a circuit board fixedly arranged in the shell, wherein a heating piece which can generate heat when the circuit board is electrified is arranged on the bottom surface of the circuit board; the miniature photovoltaic inverter has good heat radiation performance, compact and reasonable structural layout, convenient assembly and manufacture, convenient operation and use, and reasonable solutions for the problems of hanging, moisture and dust prevention, installation and fixation of a circuit board and the like of the miniature photovoltaic inverter are provided.

Description

Miniature photovoltaic inverter

Technical Field

The utility model belongs to the technical field of solar photovoltaic power generation, and relates to a miniature photovoltaic inverter, in particular to a heat dissipation structure thereof.

Background

Along with the gradual shortage of energy and the gradual aggravation of environmental pollution, clean energy and renewable energy become the fields of important development of various countries in the world at present, wherein the photovoltaic power generation technology is more and more valued and welcome by people because of the advantages of green, environmental protection, renewable and the like. In the photovoltaic power generation technology, an inverter for converting direct-current electric energy generated by a photovoltaic module into alternating-current electric energy is a key component of the whole photovoltaic power generation technology.

The numerous heating devices in the photovoltaic inverter circuit are a difficult problem for the design of the photovoltaic inverter in terms of how to reduce the heating of the photovoltaic inverter and improve the heat dissipation efficiency. Current photovoltaic inverter products pursue higher energy densities while requiring smaller size and lighter weight inverters. Under such conditions, there are higher demands placed on the design of the heat sink. The back of the photovoltaic inverter with common size is specially provided with a radiator which is equivalent to the body volume of the photovoltaic inverter, the micro photovoltaic inverter is usually smaller in size and lighter in weight and is required to have the power of below 2000W, the photovoltaic inverter is not suitable for specially arranging the radiator, and the micro photovoltaic inverter circuit has the same device with heating temperature which is not allowed to exceed the rated value although the heating device is relatively less and the heating value is relatively less, so that the heat dissipation problem is also required to be solved.

In order to achieve more efficient heat dissipation, the existing micro photovoltaic inverter generally adopts an increased heat dissipation area, or adopts a space in the micro photovoltaic inverter to be increased so as to accelerate heat dissipation, and adopts a fan with higher performance to solve the heat dissipation problem. However, the above method causes problems such as increased size and cost of the product, troublesome installation, etc.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present utility model is to provide a miniature photovoltaic inverter with compact and reasonable structure, good heat dissipation and convenient assembly and use.

The technical scheme adopted by the miniature photovoltaic inverter is as follows:

the utility model provides a miniature photovoltaic inverter, includes casing and apron and fixed mounting circuit board in the casing, and the bottom surface of circuit board has the piece that generates heat that can generate heat of circular telegram during operation, its characterized in that is provided with the boss on the diapire in the casing, during the equipment the piece that generates heat of circuit board with laminate mutually on the diapire in the casing.

The further scheme is as follows:

and heat conduction silicone grease is arranged between the heating part of the circuit board and the boss on the bottom wall in the shell during assembly.

The heating element comprises a first heating element, a second heating element, a third heating element and a fourth heating element, and correspondingly, the boss on the bottom wall in the shell comprises a first boss, a second boss, a third boss and a fourth boss, the first heating element, the second heating element, the third heating element, the fourth heating element, the first boss, the second boss, the third boss and the fourth boss are at least 1, and the first heating element, the second heating element, the third heating element, the fourth heating element and the corresponding first boss, the second boss, the third boss and the fourth boss are sequentially attached to each other during assembly.

The shell is provided with frames around, each side frame is provided with at least 1 threaded hole, and the corresponding positions of the cover plate close to the edges are provided with connecting holes and are connected by configuration screws.

The shell is provided with a reinforcing block below the frame where the threaded holes are located, and the threaded holes are formed downwards along the reinforcing block.

The shell frame is provided with a groove along the inner circumference of the shell frame, and a sealing strip is embedded in the groove.

An extension plate is additionally arranged on one side frame of the shell, and the extension plate is provided with hanging holes for hanging or fixing the micro photovoltaic inverter on a photovoltaic plate or other objects.

The circuit board is characterized in that at least 1 reinforcing column is arranged at the side close to each side of the inner bottom surface of the shell, each reinforcing column is provided with a threaded hole, connecting holes are formed in corresponding positions of the periphery of the circuit board, the connecting holes are connected by the screws, and the screws penetrate through the connecting holes of the circuit board and are screwed into the threaded holes, so that the circuit board is fixedly installed in the shell.

The miniature photovoltaic inverter shell is formed by die casting metal aluminum, and because the metal aluminum has good heat conduction performance, the aluminum die casting shell is utilized to have good heat dissipation performance, and the boss is arranged on the bottom wall in the shell, so that the heating piece of the circuit board is attached to the boss on the bottom wall in the shell during assembly, and the heat of the heating piece of the circuit board is dissipated through the outer surface of the shell. The miniature photovoltaic inverter has good heat radiation performance. The miniature photovoltaic inverter has compact and reasonable structural layout, is convenient to assemble and manufacture, and is convenient for users to operate and use. In addition, the miniature photovoltaic inverter also provides a reasonable solution for the problems of hanging, moisture and dust prevention, circuit board installation and fixation and the like of the photovoltaic inverter. The radiator scheme of the photovoltaic inverter is particularly suitable for miniature photovoltaic inverters with power of 300W to 600 kw.

Drawings

Fig. 1 is a schematic perspective view of the entire back side of the micro photovoltaic inverter of the present utility model.

Fig. 2 is a schematic perspective view of the whole cover plate of the micro photovoltaic inverter.

Fig. 3 is a front perspective view of a hidden cover plate and a circuit board of the micro photovoltaic inverter of the present utility model.

Fig. 4 is a schematic front perspective view of the housing.

Fig. 5 is a schematic rear perspective view of the housing.

Fig. 6 is a schematic front perspective view of a circuit board.

Fig. 7 is a schematic perspective view of the back side of the circuit board.

Fig. 8 is a schematic front perspective view of the cover plate.

Fig. 9 is a schematic rear perspective view of the cover plate.

Reference numerals in the drawings: 1. a housing; 2. a cover plate; 3. a circuit board; 4. a first heat generating member; 5. a second heat generating member; 6. a third heat generating member; 7. a fourth heat generating member; 8. a first boss; 9. a second boss; 10. a third boss; 11. a fourth boss; 12. a frame; a screw hole; 14. a connection hole; 15. a screw; 16. a reinforcing block; 17. a groove; 18. an extension plate; 19. a hanging hole; 20. and (5) reinforcing the column.

Detailed Description

Specific embodiments of the present utility model will be described below with reference to fig. 1 to 9.

The miniature photovoltaic inverter comprises a shell, a cover plate thereof and a circuit board 3 fixedly arranged in the shell 1, wherein the bottom surface of the circuit board 3 is provided with a heating piece which can generate heat when the circuit board is electrified, the inner bottom wall of the shell 1 is provided with a boss, and the heating piece of the circuit board 3 is attached to the boss on the inner bottom wall of the shell 1 when the miniature photovoltaic inverter is assembled, as shown in fig. 1, 2 and 3. During assembly, heat conduction silicone grease can be arranged between the heating element of the circuit board 3 and the boss on the inner bottom wall of the shell 1 so as to enhance the heat conduction performance of the circuit board. The housing 1 may be die cast from metallic aluminum. Because metal aluminum has good heat conduction performance, the aluminum die-casting shell body has good heat dissipation performance, and the boss is arranged on the inner bottom wall of the shell body, so that the heating piece of the circuit board is attached to the boss on the inner bottom wall of the shell body during assembly, and the heat of the heating piece of the circuit board is dissipated out through the outer surface of the shell body. The miniature photovoltaic inverter has good heat radiation performance.

The heat generating components of the circuit board 3 are disposed on the back surface of the circuit board 3, and as shown in fig. 6 and 7, the heat generating components of the circuit board 3 include a first heat generating component 4, a second heat generating component 5, a third heat generating component 6, and a fourth heat generating component 7. Correspondingly, as shown in fig. 3 and 4, the boss on the inner bottom wall of the shell 1 comprises a first boss 8, a second boss 9, a third boss 10 and a fourth boss 11, wherein the first heating element 4, the second heating element 5, the third heating element 6 and the fourth heating element 7 are at least 1 with the first boss 8, the second boss 9, the third boss 10 and the fourth boss 11, and the first heating element 4, the second heating element 5, the third heating element 6 and the fourth heating element 7 are sequentially attached to the corresponding first boss 8, the second boss 9, the third boss 10 and the fourth boss 11 during assembly.

As shown in fig. 3, 4 and 5, a frame 12 is provided around the housing 1, and at least 1 screw hole 13 is provided in each side frame 12. In order to strengthen the fixed connection strength between the cover plate 2 and the housing 1, the housing 1 may be provided with a reinforcing block 16 below the frame 12 where the threaded hole 13 is located, and the threaded hole 13 may be opened downward along the reinforcing block 16. In order to strengthen the dampproof and dustproof effects of the circuit board 3 in the shell 1, the frame 12 of the shell 1 is provided with grooves 17 along the inner circumference of the frame, and sealing strips are embedded in the frame. As shown in fig. 8 and 9, the corresponding position of the side of the cover plate 2 is provided with a connecting hole 14, and is connected by a configuration screw 15, and the cover plate 2 is fixedly connected with the shell 1 during assembly. At least 1 reinforcing column 20 is arranged at the side close to each side of the inner bottom surface of the shell 1, each reinforcing column 20 is provided with a threaded hole 13, the corresponding position of the periphery of the circuit board 3 is provided with a connecting hole 14, the connecting holes are connected by a configuration screw 15, and the screw 15 penetrates through the connecting hole 14 of the circuit board 3 to be screwed into the threaded hole 13, so that the circuit board 3 is fixedly arranged in the shell 1.

In order to facilitate the mounting of the micro photovoltaic inverter, as shown in fig. 1, 2 and 3, an extension plate 18 is additionally arranged on one side frame 12 of the casing 1, and the extension plate 18 is provided with a hanging hole 19 for mounting or fixing the micro photovoltaic inverter on a photovoltaic panel or other objects.

The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the utility model, which is defined by the claims, but rather by the claims.

Claims

1. The utility model provides a miniature photovoltaic inverter, includes casing (1) and apron (2) and fixed mounting circuit board (3) in casing (1), and the bottom surface of circuit board (3) has the piece that generates heat that can generate heat when circular telegram work, its characterized in that is provided with the boss on the diapire in casing (1), during the equipment the piece that generates heat of circuit board (3) with laminate mutually on the diapire in casing (1).

2. The micro photovoltaic inverter according to claim 1, wherein a heat conductive silicone grease is provided between the heat generating member of the circuit board (3) and the boss on the inner bottom wall of the housing (1) when assembled.

3. The micro photovoltaic inverter according to claim 1, wherein the heating elements comprise a first heating element (4), a second heating element (5), a third heating element (6) and a fourth heating element (7), and correspondingly, the boss on the inner bottom wall of the shell (1) comprises a first boss (8), a second boss (9), a third boss (10) and a fourth boss (11), the first heating element (4), the second heating element (5), the third heating element (6) and the fourth heating element (7) are at least 1, and the first heating element (4), the second heating element (5), the third heating element (6) and the fourth heating element (7) are sequentially attached to the corresponding first boss (8), the second boss (9), the third boss (10) and the fourth boss (11) during assembly.

4. The miniature photovoltaic inverter according to claim 1, characterized in that the housing (1) is provided with a frame (12) at the periphery, each side frame (12) is provided with at least 1 threaded hole (13), and the corresponding position of the side of the cover plate (2) is provided with a connecting hole (14) and is connected by a configuration screw (15).

5. The micro photovoltaic inverter according to claim 4, wherein the housing (1) is provided with a reinforcement block (16) under the frame (12) where the threaded hole (13) is located, and the threaded hole (13) is opened downwards along the reinforcement block (16).

6. The micro photovoltaic inverter according to claim 4, wherein the frame (12) of the housing (1) is provided with a groove (17) along the inner circumference thereof, and is embedded with a sealing strip.

7. The micro photovoltaic inverter according to claim 4, wherein an extension plate (18) is additionally arranged on one side frame (12) of the housing (1), and the extension plate (18) is provided with a hanging hole (19) for hanging or fixing the micro photovoltaic inverter on a photovoltaic panel or other objects.

8. The micro photovoltaic inverter according to claim 4, wherein at least 1 reinforcing column (20) is arranged at the side of each side of the inner bottom surface of the housing (1), each reinforcing column (20) is provided with a threaded hole (13), the corresponding position of the periphery of the circuit board (3) is provided with a connecting hole (14) and is connected by a screw (15), the screw (15) penetrates through the connecting hole (14) of the circuit board (3) and is screwed into the threaded hole (13), and the circuit board (3) is fixedly installed in the housing (1).