String type inverter capable of rapidly dissipating heat

Abstract

The utility model discloses a quick heat dissipation string type inverter, which comprises an inverter case, an inverter body and a square tube, the top end and the front side of the inverter case are open, a rectangular notch is arranged between the left side and the right side of the inverter case, the bottom end of the inverter case is provided with an opening matched with the rectangular notch, and the square tube is connected with the inverter body. A U-shaped folded plate is fixedly installed in a rectangular opening of the inverter case, two vertical sections of the U-shaped folded plate are both provided with a plurality of exhaust holes, a bearing frame is fixedly installed at the top end of the U-shaped folded plate, the inverter body is fixedly installed on the side wall of the bearing frame, and an end face plate matched with a front side opening of the inverter case is fixedly installed at the bottom end of the square pipe. A square tube is arranged on the end face plate, a butt joint block is arranged at the bottom end of the square tube, the butt joint block and the inverter case are arranged in a sliding and clamping mode, a plurality of first cooling fins are fixedly installed on the inverter case, a plurality of second cooling fins are arranged on one side of the end face plate, and a wiring terminal assembly is fixedly installed at the bottom end of the inverter case. The LED lamp is better in overall heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of inverters, and particularly relates to a string inverter with fast heat dissipation. Background Art

[0002] A string inverter is an inverter based on the modular concept, mainly used to convert the direct current generated by solar cell modules into alternating current and output it to the power grid. Each photovoltaic string works through an inverter. Such a design enables the string inverter to have the function of maximum power peak tracking at the DC end and is connected in parallel at the AC end. This kind of inverter is mainly applied to relatively small-scale distributed photovoltaic power stations to ensure the continuous and stable operation of the photovoltaic power station. At the same time, due to its small size, light weight, easy installation and other characteristics, it is often used in places with complex terrain and is generally installed outdoors for use.

[0003] Chinese Patent (CN218335773U) discloses a string inverter with heat dissipation performance, including an inverter base box and a front panel. A plurality of internal threaded holes are opened at the edge of the front surface of the inverter base box, and the front panel is connected to the internal threaded holes through bolts. A connection terminal is fixedly installed on the lower surface of the inverter base box, and an interface protective cover is fixedly installed on the lower surface of the inverter base box around the connection terminal. The exhaust fan can cooperate with the exhaust air duct to discharge the heat inside the inverter base box to the outside of the inverter base box along the exhaust air duct by using gas as a carrier.

[0004] However, there are some drawbacks in the above related technologies. For example, when the string inverter works in harsh outdoor environments such as high temperature, dust, and rain, the exhaust fan and the exhaust air duct dissipate heat from the inverter. Since the positions of the exhaust fan and the exhaust air duct are adjacent, the probability of air convection in the inverter chassis is high, the air flow distribution is uneven, the heat dissipation effect is not good enough, and the connection terminal is exposed outside the inverter chassis and is prone to moisture, so the moisture-proof performance of the inverter is not good enough. Summary of the Utility Model

[0005] To solve the above problems existing in the prior art, the utility model provides a string inverter with fast heat dissipation, which can achieve the purpose of fast heat dissipation.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A string inverter with fast heat dissipation, comprising an inverter chassis, an inverter body and a square tube. The top and the front side of the inverter chassis are open. A rectangular notch is provided between the left and right sides of the inverter chassis. An open port matching the rectangular notch is provided at the bottom of the inverter chassis. A U-shaped folding plate is fixedly installed in the rectangular notch of the inverter chassis. A plurality of exhaust holes distributed in an array are provided on both vertical sections of the U-shaped folding plate. A bearing frame is fixedly installed at the top of the U-shaped folding plate. The inverter body is fixedly installed on the side wall of the bearing frame through fasteners. A front panel matching the front open port of the inverter chassis is fixedly installed at the bottom of the square tube. A docking block is provided at the bottom of the square tube. The docking block is slidably clamped with the inverter chassis. A plurality of first heat sinks distributed in an array are fixedly installed on the inner walls of the left and right sides and the rear inner wall of the inverter chassis. A plurality of second heat sinks distributed in an array are provided on the side of the front panel close to the inverter body. A wiring terminal assembly electrically connected to the inverter body is fixedly installed at the bottom of the inverter chassis. A card wire strip for wire management is fixedly installed at the bottom of the inverter chassis. An air-cooled fan is fixedly installed through and at the bottom of the square tube. A temperature and humidity sensor is fixedly installed through and at the bottom wall of the square tube. Filter structures for filtering dust are provided in both open ports of the square tube. Two drying structures symmetrically arranged with respect to the air-cooled fan are provided in the square tube. The side-open inverter box body facilitates the disassembly, installation and maintenance of the inverter. The card wire strip cooperates with the front panel to comb and fix the wires, facilitating the maintenance of the inverter. The air-cooled fan draws external air from the square tube into the inverter chassis. The filter structure filters the dust in the air. The drying structure in the square hole of the bearing frame dries the filtered moisture. Cooperating with the first heat sink and the second heat sink, the air flow carries the heat in the inverter chassis out through the exhaust holes of the U-shaped folding plate. The double-row symmetrical distribution of the exhaust holes on the U-shaped folding plate allows the air flow to flow from top to bottom, reducing the probability of convection occurrence. Cooperating with the inverter chassis, the flow distribution of the cooling air flow is more uniform, and the overall heat dissipation effect is better.

[0008] Preferably, the opening of the U-shaped folding plate is downward, and the bottom end of the U-shaped folding plate is flush with the bottom end of the inverter chassis, which has a supporting effect.

[0009] Preferably, sliding grooves are provided on both the left and right sides of the front panel. Two folded edges are formed at the front side of the inverter chassis through the open port. A rubber layer is provided on the surface of the folded edge of the inverter chassis. The sliding grooves of the front panel are slidably connected with the folded edges of the inverter chassis. The front panel cooperates with the folded edges to cover the inverter chassis.

[0010] Preferably, a groove is provided at the bottom of the square tube. The docking block is fixedly installed in the groove of the square tube. The clamped part of the docking block and the inverter chassis is fixedly connected through fasteners.

[0011] Preferably, a notch matching the card line is provided at the bottom end of the end panel. A plurality of wire management holes distributed in an array are provided between the top end of the card line and the top wall of the notch of the end panel. The wires connected to the terminal block assembly are matched with the wire management holes. The card line cooperates with the end panel to comb and fix the wires, facilitating the maintenance of the inverter. Moreover, the terminal block is placed inside the inverter chassis, extending the service life of the terminal block.

[0012] Preferably, the filtering structure includes a filter plate. Support frames are provided on the inner walls of the two open ends of the square tube. The filter plate is fixedly installed on the side wall of the support frame by screws, and the filter plate filters dust in the air.

[0013] Preferably, the drying structure includes a carrier frame. The carrier frame penetrates and is slidably installed at the top end of the square tube. The top end of the carrier frame is fixedly connected to the square tube through a fastener. The cross-section of the carrier frame is T-shaped. A square hole is provided in the vertical section of the carrier frame. Two filter meshes are installed in the square hole of the carrier frame through fasteners. A gap is left between the two filter meshes, and quicklime desiccant is filled between the two filter meshes. The two filter meshes in the square hole of the carrier frame cooperate with the quicklime desiccant to dry the filtered moisture.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. By providing the inverter chassis and the U-shaped folding plate, the air-cooling fan draws external air from the square tube into the inverter chassis. The filter plate filters dust in the air. The two filter meshes in the square hole of the carrier frame cooperate with the quicklime desiccant to dry the filtered moisture. In combination with the first heat sink and the second heat sink, the airflow carries the heat in the inverter chassis and discharges it from the exhaust holes of the U-shaped folding plate. The double-row symmetric distribution of the exhaust holes on the U-shaped folding plate allows the airflow to flow from top to bottom, reducing the probability of convection. In combination with the inverter chassis, the flow distribution of the cooling airflow is more uniform, and the overall heat dissipation effect is better.

[0016] 2. By providing the inverter chassis and the end panel, the inverter box with open sides facilitates the disassembly and maintenance of the inverter. The card line cooperates with the end panel to comb and fix the wires, facilitating the maintenance of the inverter. Moreover, the terminal block is placed inside the inverter chassis, extending the service life of the terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 It is an installation structure diagram of the carrier frame in the present utility model;

[0020] Figure 3 It is the installation structure diagram of the inverter body in the present utility model;

[0021] Figure 4 It is the installation structure diagram of the second heat sink in the present utility model;

[0022] Figure 5 It is the installation structure diagram of the carrier in the present utility model;

[0023] Figure 6 It is the cross-sectional view of the carrier in the present utility model.

[0024] Main element symbol description:

[0025] In the figure: 1. Inverter chassis; 2. Inverter body; 3. U-shaped folding plate; 4. Carrier frame; 5. Square tube; 6. End panel; 7. Docking block; 8. First heat sink; 9. Second heat sink; 10. Wiring terminal assembly; 11. Card wire; 12. Air-cooled fan; 13. Temperature and humidity sensor; 14. Support frame; 15. Filter plate; 16. Carrier; 17. Filter screen; 18. Quicklime desiccant. Specific implementation manners

[0026] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following describes in clear and complete detail the specific implementation manners, structures, features and their effects of the present utility model in conjunction with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "inside" and "outside" is based on the orientation or position shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and thus should not be construed as a limitation to the present application.

[0028] Refer to Figure 1-4, a string inverter with fast heat dissipation disclosed by the present utility model, includes an inverter chassis 1, an inverter body 2 and a square tube 5. The top and the front side of the inverter chassis 1 are open. A rectangular notch is provided between the left and right sides of the inverter chassis 1. An open port matching the rectangular notch is provided at the bottom end of the inverter chassis 1. A U-shaped folding plate 3 is fixedly installed in the rectangular notch of the inverter chassis 1. The opening of the U-shaped folding plate 3 faces downward, and the bottom end of the U-shaped folding plate 3 is flush with the bottom end of the inverter chassis 1, which has a supporting effect. A plurality of exhaust holes are arranged in an array on both vertical sections of the U-shaped folding plate 3. The two groups of symmetrically arranged exhaust holes cooperate with the inverter chassis 1 to make the flow distribution of the cooling air flow more uniform and the heat dissipation effect better. A bearing frame 4 is fixedly installed at the top end of the U-shaped folding plate 3, which has a supporting effect. The inverter body 2 is fixedly installed on the side wall of the bearing frame 4 through fasteners. An end panel 6 matching the front open port of the inverter chassis 1 is fixedly installed at the bottom end of the square tube 5. Sliding grooves are provided on both the left and right sides of the end panel 6. Two flanges are formed at the front side of the inverter chassis 1 through the open port. A rubber layer is provided on the surface of the flange of the inverter chassis 1. The sliding groove of the end panel 6 is slidably connected with the flange of the inverter chassis 1, which has a covering effect. A docking block 7 is provided at the bottom end of the square tube 5. The docking block 7 is slidably clamped with the inverter chassis 1. A groove is provided at the bottom end of the square tube 5. The docking block 7 is fixedly installed in the groove of the square tube 5. The clamping part of the docking block 7 and the inverter chassis 1 is fixedly connected through fasteners, which has a docking effect. A plurality of first heat sinks 8 are fixedly installed on the inner walls of the left and right sides and the rear inner wall of the inverter chassis 1 in an array. A plurality of second heat sinks 9 are arranged in an array on the side of the end panel 6 close to the inverter body 2, which has the function of assisting in heat transfer and dissipation. The inverter box body 1 with both sides open is convenient for disassembly, installation and maintenance of the inverter. The double-row symmetric distribution of the exhaust holes on the U-shaped folding plate 3 makes the air flow from top to bottom, reducing the probability of convection, and cooperating with the inverter chassis 1 to make the flow distribution of the cooling air flow more uniform and the overall heat dissipation effect better.

[0029] Refer to Figure 1 and Figure 3-4, a wiring terminal assembly 10 electrically connected to the inverter body 2 is fixedly installed at the bottom end of the inverter chassis 1. A card wire strip 11 for wire management is fixedly installed at the bottom end of the inverter chassis 1. A notch matching the card wire strip 11 is provided at the bottom end of the end panel 6. A plurality of wire management holes are arranged in an array between the top end of the card wire strip 11 and the top wall of the notch of the end panel 6. The wires connected to the wiring terminal assembly 10 match the wire management holes. The card wire strip 11 cooperates with the end panel 6 to comb and fix the wires, and the wiring terminal is placed inside the inverter chassis, extending the service life of the wiring terminal. An air-cooling fan 12 is fixedly installed through and at the bottom end of the square tube 5, which has an air-cooling function. A temperature and humidity sensor 13 is fixedly installed through and at the bottom wall of the square tube 5, which has the function of monitoring the temperature and humidity inside the inverter chassis 1. When the humidity exceeds the warning value, the data is uploaded to the controller terminal.

[0030] Refer to Figure 1 and Figure 5-6 , filter structures for filtering dust are arranged in both open ports of the square tube 5. The filter structure includes a filter plate 15. Support frames 14 are arranged on the inner walls of both open ports of the square tube 5, which have a supporting function. The filter plate 15 is fixedly installed on the side wall of the support frame 14 by screws, which has the function of filtering dust in the air. Two drying structures symmetrically arranged with respect to the air-cooling fan 12 are arranged in the square tube 5. The drying structure includes a carrier frame 16. The carrier frame 16 is installed through and slidably at the top end of the square tube 5. The top end of the carrier frame 16 is fixedly connected to the square tube 5 through a fastener, which has a supporting function. The cross-section of the carrier frame 16 is T-shaped. Square holes are arranged in the vertical section of the carrier frame 16. Two filter meshes 17 are installed in the square holes of the carrier frame 16 through fasteners. A gap is left between the two filter meshes 17. Quicklime desiccant 18 is filled between the two filter meshes 17, which has the function of drying the air.

[0031] The working principle and usage process of the present utility model: The inverter box body 1 with both sides open facilitates the disassembly, installation, and maintenance of the inverter. The card wire strip 11 cooperates with the end panel 6 to comb and fix the wires, facilitating the maintenance of the inverter, and the wiring terminal is placed inside the inverter chassis, extending the service life of the wiring terminal. During the use of the inverter body 2, the air-cooling fan 12 sucks the outside air from the square tube 5 into the inverter chassis 1. The filter plate 15 filters the dust in the air. The two filter meshes 17 in the square holes of the carrier frame 16 cooperate with the quicklime desiccant 18 to dry the filtered moisture. Cooperating with the first heat sink 8 and the second heat sink 9, the air flow carries the heat inside the inverter chassis 1 out through the exhaust holes of the U-shaped folding plate 3. The exhaust holes on the U-shaped folding plate 3 are symmetrically distributed in two rows. The air flow is from top to bottom, reducing the probability of convection occurring. Cooperating with the inverter chassis 1 makes the flow distribution of the cooling air flow more uniform, and the overall heat dissipation effect is better.

[0032] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments of equivalent changes by using the above-disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A string inverter with rapid heat dissipation, comprising an inverter chassis (1), an inverter body (2) and a square tube (5), characterized in that: The top and front side of the inverter case (1) are open, a rectangular notch is provided between the left and right sides of the inverter case (1), an open opening matching the rectangular notch is provided at the bottom of the inverter case (1), a U-shaped folding plate (3) is fixedly installed in the rectangular notch of the inverter case (1), two vertical sections of the U-shaped folding plate (3) are provided with a plurality of exhaust holes distributed in an array, a bearing frame (4) is fixedly installed at the top of the U-shaped folding plate (3), the inverter body (2) is fixedly installed on the side wall of the bearing frame (4) by fasteners, an end panel (6) matching the front open opening of the inverter case (1) is fixedly installed at the bottom of the square tube (5), a docking block (7) is provided at the bottom of the square tube (5), the docking block (7) is slidably engaged with the inverter case (1), and the The left and right side inner walls and the rear side inner wall of the inverter case (1) are both fixedly mounted with a plurality of first heat sinks (8) distributed in an array; a side of the end panel (6) close to the inverter body (2) is provided with a plurality of second heat sinks (9) distributed in an array; a terminal block assembly (10) electrically connected to the inverter body (2) is fixedly mounted at the bottom end of the inverter case (1); a cable clip (11) for wiring is fixedly mounted at the bottom end of the inverter case (1); an air cooling fan (12) is passed through and fixedly mounted at the bottom end of the square tube (5); a temperature and humidity sensor (13) is passed through and fixedly mounted at the bottom wall of the square tube (5); filtering structures for filtering dust are provided in both open openings of the square tube (5); and two groups of drying structures symmetrically arranged with respect to the air cooling fan (12) are provided in the square tube (5).

2. A string inverter with rapid heat dissipation according to claim 1, characterized in that: The opening of the U-shaped folded plate (3) is arranged downward, and the bottom end of the U-shaped folded plate (3) is arranged flush with the bottom end of the inverter chassis (1).

3. The fast heat dissipation string inverter according to claim 1, characterized in that: The left and right sides of the end panel (6) are both provided with sliding grooves, the front side of the inverter chassis (1) forms two folded edges through an open mouth, the folded edge surface of the inverter chassis (1) is provided with a rubber layer, and the sliding groove of the end panel (6) is slidably connected to the folded edge of the inverter chassis (1).

4. The fast heat dissipation string inverter according to claim 1, characterized in that: The bottom end of the square tube (5) is provided with a groove, the docking block (7) is fixedly installed in the groove of the square tube (5), and the docking block (7) and the clamping part of the inverter chassis (1) are fixedly connected by a fastener.

5. The fast heat dissipation string inverter according to claim 1, characterized in that: The bottom end of the end panel (6) is provided with a notch matching the card line (11), a plurality of wire management holes distributed in an array are provided between the top end of the card line (11) and the top wall of the notch of the end panel (6), and the wires connected to the terminal assembly (10) match the wire management holes.

6. The fast heat dissipation string inverter according to claim 1, characterized in that: The filtering structure comprises a filter plate (15), and the inner walls of the two open openings of the square tube (5) are both provided with a support frame (14), and the filter plate (15) is fixedly mounted on the side wall of the support frame (14) by means of screws.

7. The fast heat dissipation string inverter according to claim 1, characterized in that: The drying structure comprises a carrier frame (16), the carrier frame (16) penetrates through and is slidably mounted on the top end of the square tube (5), the top end of the carrier frame (16) is fixedly connected to the square tube (5) via a fastener, the cross section of the carrier frame (16) is T-shaped, a square hole is arranged in the vertical section of the carrier frame (16), two filter screens (17) are installed in the square hole of the carrier frame (16) via a fastener, a spacing is left between the two filter screens (17), and quicklime desiccant (18) is filled between the two filter screens (17).

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