String type inverter cabinet waterproof structure

Abstract

The utility model relates to the technical field of inverters, in particular to a string type inverter case waterproof structure, which comprises a base, a case square tube and a cover plate, the case square tube is fixedly arranged on the front side of the base, the length of the cover plate in the vertical direction is the same as the length of the base in the vertical direction, and the case square tube is fixedly arranged on the base. The length of the cover plate in the horizontal direction is equal to the distance between the outer walls of the left side and the right side of the case square pipe, a fixing structure used for fixing the cover plate is arranged at the top end of the case square pipe, a bearing frame is fixedly installed on the front side of the base, and a plurality of heat dissipation holes distributed in an array mode are formed in the plate body, away from the base, of the bearing frame. And the bottom end of the case square tube penetrates through and is fixedly provided with a wiring terminal assembly. According to the utility model, a protection structure is arranged at a wiring position, the overall rainproof effect of the case is improved, and a dehumidification structure is arranged, so that the corrosion of humid air to circuits and components in the case is reduced.

Description

Technical Field

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

[0002] The string inverter is a modular inverter, which is mainly used to convert the DC power generated by the solar cell module into AC power and output it to the power grid. Each photovoltaic string works through an inverter. This design enables the string inverter to have the maximum power peak tracking function at the DC end and parallel grid connection at the AC end. This inverter is mainly used in relatively small-scale distributed photovoltaic power stations to ensure the continuous and stable power generation of photovoltaic power stations. At the same time, due to its small size, light weight, and easy installation, it is often used in places with complex terrain and is generally installed outdoors.

[0003] When the string inverter is used outdoors, since the side wall of the chassis is generally provided with multiple holes for heat dissipation, rain or humid air may enter the chassis, accelerating the corrosion of components and circuits, and even causing a short circuit. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a waterproof structure of a string inverter chassis, which can overcome the above problems.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A waterproof structure for a string inverter chassis, comprising a base, a chassis square tube and a cover plate, wherein the chassis square tube is fixedly installed on the front side of the base, the vertical length of the cover plate is the same as the vertical length of the base, the horizontal length of the cover plate is set to be equal to the spacing between the left and right outer walls of the chassis square tube, the top of the chassis square tube is provided with a fixing structure for fixing the cover plate, a bearing frame is fixedly installed on the front side of the base, and a plate body of the bearing frame away from the base is provided with a plurality of heat dissipation holes distributed in an array, a terminal assembly is penetrated and fixedly installed on the bottom end of the chassis square tube, a protective structure for protecting the terminal assembly is provided between the cover plate and the base, the base, the chassis square tube and the cover plate constitute the main body of the inverter chassis, a plurality of two L-shaped plates cooperate with the cover plate and the base to surround the terminal assembly, which has a rainproof effect, the drainage cover forms a flow exchange channel for air inside and outside the chassis, and other positions are in a sealed state, and the opening of the drainage cover faces downward, thereby improving the waterproof effect of the chassis.

[0007] A plurality of square holes distributed in an array are provided on both sides of the square tube of the chassis, a plurality of drainage covers for rain protection are provided on both sides of the square tube of the chassis, the drainage covers and the square holes on the same side of the square tube of the chassis are distributed at intervals, a support plate is installed on one side of the square tube of the chassis, a plurality of through holes distributed in an array are provided on the side wall of the support plate, the drainage covers are located in the through holes, three dehumidification boxes distributed in an array are fixedly installed on one side of the support plate close to the square tube of the chassis, the dehumidification boxes are slidably installed in the square holes, the dehumidification boxes are located between the carrier frame and the base, a desiccant is provided in the dehumidification box, and two sets of blowing mechanisms are provided on the top wall of the square tube of the chassis, which blow to accelerate the air flow in the chassis, and the air inside and outside the chassis is exchanged through the heat dissipation holes of the carrier frame and the drainage covers. At the same time, the airflow passes through the surface of the dehumidification box, and the desiccant in the dehumidification box absorbs moisture carried by the airflow.

[0008] Preferably, the fixing structure comprises a support block, and the support block is fixedly installed on the top end of the square tube of the chassis, and two bolts penetrate and are installed between the support block and the cover plate.

[0009] Preferably, a reinforcement frame is fixedly mounted on one side of the cover plate close to the base, the reinforcement frame is slidably sleeved with the square tube of the chassis, and a rubber layer is provided on the outer wall of the reinforcement frame.

[0010] Preferably, the protective structure includes two L-shaped plates, the L-shaped plates include a long plate and a short plate distributed vertically, one end of the long plate of the L-shaped plate is fixedly connected to the side wall of the cover plate, and the short plate of the L-shaped plate is penetrated and threadedly connected with a screw, and the screw is threadedly connected to the base.

[0011] Preferably, the bottom end of the drainage cover and the end close to the square tube of the chassis are both open, and the left and right sides of the square tube of the chassis are provided with a plurality of circular holes with semicircular cross-sections, and the drainage cover matches the circular holes of the square tube of the chassis.

[0012] Preferably, the dehumidification box includes a box body, the top end of the box body is open, a box cover is provided at the open position of the box body, a fastener is provided between the box cover and the box body, the bottom ends of the box cover and the box body are both provided with a plurality of ventilation holes distributed in an array, and the desiccant in the dehumidification box is bagged.

[0013] Preferably, three L-shaped blocks distributed in an array are fixedly mounted on the front side of the base, and the L-shaped blocks are slidably connected to the box body.

[0014] Preferably, the air blowing mechanism comprises an air cooling fan, two support frames are fixedly mounted on the top wall of the square tube of the chassis, and the air cooling fan is mounted on the bottom end of the support frame.

[0015] The beneficial effects of the utility model are:

[0016] 1. The base and the chassis square tube are arranged, and the base, the chassis square tube and the cover plate constitute the main body of the inverter chassis. Two L-shaped plates cooperate with the cover plate and the base to surround the terminal assembly, which has a rainproof effect. The drainage cover forms a flow exchange channel for the air inside and outside the chassis. Other positions are in a sealed state, and the opening of the drainage cover faces downward, which improves the waterproof effect of the chassis.

[0017] 2. By setting up a dehumidification box and blowing the air cooling fan, the air flow in the chassis is accelerated. The air inside and outside the chassis is exchanged through the heat dissipation holes and the drainage cover of the support frame. At the same time, the air flow passes through the surface of the dehumidification box, and the desiccant in the dehumidification box absorbs the moisture carried by the air flow, thus forming a dehumidification structure to reduce the corrosion of humid air to the circuits and components in the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is the installation structure diagram of the L-shaped plate in the utility model;

[0021] Figure 3 This is a diagram of the installation structure of the carrier frame in the utility model;

[0022] Figure 4 This is a diagram of the installation structure of the support plate in the utility model;

[0023] Figure 5 This is the installation structure diagram of the box body in the utility model;

[0024] Description of main component symbols:

[0025] In the figure: 1. base; 2. chassis square tube; 3. cover plate; 4. support block; 5. bolt; 6. L-shaped plate; 7. screw; 8. reinforcement frame; 9. carrier frame; 10. terminal block assembly; 11. square hole; 12. drainage cover; 13. support plate; 14. through hole; 15. dehumidification box; 1501. box body; 1502. box cover; 1503. ventilation hole; 16. L-shaped block; 17. support frame; 18. air-cooling fan. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside" or "outside" etc. is based on the orientation or position described 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 therefore cannot be understood as a limitation on the present application.

[0028] Reference Figure 1-Figure 3 , which is a waterproof structure of a string inverter chassis disclosed by the utility model, including a base 1, a chassis square tube 2 and a cover plate 3. The chassis square tube 2 is fixedly installed on the front side of the base 1 to have a supporting function. The vertical length of the cover plate 3 is the same as the vertical length of the base 1. The horizontal length of the cover plate 3 is set to be equal to the distance between the left and right outer walls of the chassis square tube 2. A fixing structure for fixing the cover plate 3 is provided on the top of the chassis square tube 2. The fixing structure includes a supporting block 4. The supporting block 4 is fixedly installed on the top of the chassis square tube 2 to have a supporting function. Two bolts 5 are penetrated and installed between the supporting block 4 and the cover plate 3 to have a fixed connection function of the cover plate 3 and the chassis square tube 2. A reinforcement frame 8 is fixedly installed on one side of the cover plate 3 close to the base 1. The reinforcement frame 8 is slidably sleeved with the chassis square tube 2 to reinforce The outer wall of the frame 8 is provided with a rubber layer, which improves the sealing between the cover plate 3 and the chassis square tube 2. A carrier frame 9 is fixedly installed on the front side of the base 1. The carrier frame 9 is used to install inverter components. A plurality of heat dissipation holes distributed in an array are provided on the plate body of the carrier frame 9 away from the base 1. A terminal assembly 10 is penetrated and fixedly installed at the bottom end of the chassis square tube 2. A protective structure for protecting the terminal assembly 10 is provided between the cover plate 3 and the base 1. The protective structure includes two L-shaped plates 6. The L-shaped plate 6 includes a long plate and a short plate that are vertically distributed. One end of the long plate of the L-shaped plate 6 is fixedly connected to the side wall of the cover plate 3. A screw 7 is penetrated and threadedly connected to the short plate of the L-shaped plate 6. The screw 7 is threadedly connected to the base 1. The two L-shaped plates 6 cooperate with the cover plate 3 and the base 1 to surround the terminal assembly 10, which has a rainproof effect.

[0029] Reference Figure 1 and Figure 3-Figure 4A plurality of square holes 11 distributed in an array are arranged on the left and right sides of the square tube 2 of the chassis, and a plurality of drainage covers 12 for rain protection are arranged on the left and right sides of the square tube 2 of the chassis. The drainage covers 12 on the same side of the square tube 2 of the chassis are spaced apart from the square holes 11. The bottom end of the drainage cover 12 and the end close to the square tube 2 of the chassis are both open. A plurality of circular holes with semicircular cross-sections are arranged on the left and right sides of the square tube 2 of the chassis. The drainage cover 12 matches the circular holes of the square tube 2 of the chassis. The drainage cover 12 forms a flow exchange channel for air inside and outside the chassis. A support plate 13 is installed on one side of the square tube 2 of the chassis, which has a supporting function. A plurality of through holes 14 distributed in an array are arranged on the side wall of the support plate 13. The drainage cover 12 is located in the through hole 14 and has a ventilation function. The support plate 13 is close to the chassis. Three dehumidification boxes 15 distributed in an array are fixedly installed on one side of the square tube 2. The dehumidification boxes 15 are slidably installed in the square hole 11. The dehumidification box 15 is located between the support frame 9 and the base 1. A desiccant is arranged in the dehumidification box 15. Two sets of blowing mechanisms are arranged on the top wall of the square tube 2 of the chassis. The blowing mechanism includes an air-cooling fan 18. Two support frames 17 are fixedly installed on the top wall of the square tube 2 of the chassis. The air-cooling fan 18 is installed at the bottom of the support frame 17 and has a blowing function. The air-cooling fan 18 blows to accelerate the air flow in the chassis. The air inside and outside the chassis is exchanged through the heat dissipation holes of the support frame 9 and the drainage cover 12. At the same time, the air flow passes through the surface of the dehumidification box 15, and the desiccant in the dehumidification box 15 absorbs moisture carried by the air flow, thereby reducing the corrosion of humid air to the circuits and components in the chassis.

[0030] Reference Figure 3-Figure 5 The dehumidification box 15 includes a box body 1501, the top of the box body 1501 is open, a box cover 1502 is provided at the open position of the box body 1501, a fastener is provided between the box cover 1502 and the box body 1501, and the bottom ends of the box cover 1502 and the box body 1501 are provided with a plurality of ventilation holes 1503 distributed in an array. The desiccant in the dehumidification box 15 is bagged, and three L-shaped blocks 16 distributed in an array are fixedly installed on the front side of the base 1. The L-shaped block 16 is slidably connected to the box body 1501 and has a limiting function. The L-shaped block 16 improves the stability of the sliding process of the dehumidification box 15, and the ventilated box body 1501 and the box cover 1502 are convenient for dehumidification by the desiccant.

[0031] The working principle and use process of the utility model are as follows: the base 1, the chassis square tube 2 and the cover plate 3 constitute the main body of the inverter chassis, and two L-shaped plates 6 cooperate with the cover plate 3 and the base 1 to surround the terminal assembly 10, which has a rainproof effect. The drainage cover 12 forms a flow exchange channel for the air inside and outside the chassis, and the other positions are in a sealed state. The opening of the drainage cover 12 faces downward, which improves the waterproof effect of the chassis. The air-cooling fan 18 blows to accelerate the air flow in the chassis. The air inside and outside the chassis is exchanged through the heat dissipation holes of the support frame 9 and the drainage cover 12. At the same time, the airflow passes through the surface of the dehumidification box 15, and the desiccant in the dehumidification box 15 absorbs the moisture carried by the airflow, thereby reducing the corrosion of the humid air to the circuits and components in the chassis.

[0032] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A string inverter chassis waterproof structure, comprising a base (1), a chassis square tube (2) and a cover plate (3), characterized in that: The chassis square tube (2) is fixedly mounted on the front side of the base (1); the vertical length of the cover plate (3) is the same as the vertical length of the base (1); the horizontal length of the cover plate (3) is set to be equal to the distance between the left and right outer walls of the chassis square tube (2); a fixing structure for fixing the cover plate (3) is arranged at the top of the chassis square tube (2); a bearing frame (9) is fixedly mounted on the front side of the base (1); a plate body of the bearing frame (9) away from the base (1) is provided with a plurality of heat dissipation holes distributed in an array; a terminal assembly (10) is passed through and fixedly mounted on the bottom end of the chassis square tube (2); a protective structure for protecting the terminal assembly (10) is arranged between the cover plate (3) and the base (1); A plurality of square holes (11) distributed in an array are provided on both the left and right sides of the chassis square tube (2); a plurality of drainage covers (12) for rain protection are provided on both the left and right sides of the chassis square tube (2); the drainage covers (12) and the square holes (11) on the same side of the chassis square tube (2) are distributed at intervals; a support plate (13) is installed on one side of the chassis square tube (2); a plurality of through holes (14) distributed in an array are provided on the side wall of the support plate (13); ), the drainage cover (12) is located in the through hole (14), three dehumidification boxes (15) distributed in an array are fixedly installed on one side of the support plate (13) close to the chassis square tube (2), the dehumidification box (15) is slidably installed in the square hole (11), the dehumidification box (15) is located between the support frame (9) and the base (1), a desiccant is arranged in the dehumidification box (15), and two sets of air blowing mechanisms are arranged on the top wall of the chassis square tube (2).

2. The waterproof structure of a string inverter chassis according to claim 1, characterized in that: The fixing structure comprises a support block (4), the support block (4) being fixedly mounted on the top end of the chassis square tube (2), and two bolts (5) passing through and mounted between the support block (4) and the cover plate (3).

3. The waterproof structure of a string inverter chassis according to claim 1, characterized in that: A reinforcement frame (8) is fixedly mounted on one side of the cover plate (3) close to the base (1); the reinforcement frame (8) is slidably sleeved with the chassis square tube (2); and a rubber layer is provided on the outer wall of the reinforcement frame (8).

4. The waterproof structure of a string inverter chassis according to claim 1, characterized in that: The protective structure comprises two L-shaped plates (6), wherein the L-shaped plates (6) comprise a long plate and a short plate which are vertically distributed, wherein one end of the long plate of the L-shaped plate (6) is fixedly connected to the side wall of the cover plate (3), and a screw (7) is passed through and threadedly connected to the short plate of the L-shaped plate (6), and the screw (7) is threadedly connected to the base (1).

5. The waterproof structure of a string inverter chassis according to claim 1, characterized in that: The bottom end of the drainage cover (12) and one end close to the chassis square tube (2) are both open, and a plurality of circular holes with semicircular cross-sections are provided on the left and right sides of the chassis square tube (2), and the drainage cover (12) matches the circular holes of the chassis square tube (2).

6. The waterproof structure of a string inverter chassis according to claim 1, characterized in that: The dehumidification box (15) comprises a box body (1501), the top end of the box body (1501) is open, a box cover (1502) is provided at the open position of the box body (1501), a fastener is provided between the box cover (1502) and the box body (1501), and the bottom ends of the box cover (1502) and the box body (1501) are provided with a plurality of ventilation holes (1503) distributed in an array, and the desiccant in the dehumidification box (15) is provided in a bag.

7. The waterproof structure of a string inverter chassis according to claim 6, characterized in that: Three L-shaped blocks (16) distributed in an array are fixedly mounted on the front side of the base (1), and the L-shaped blocks (16) are slidably connected to the box body (1501).

8. The waterproof structure of a string inverter chassis according to claim 1, characterized in that: The air blowing mechanism comprises an air cooling fan (18), two support frames (17) are fixedly mounted on the top wall of the chassis square tube (2), and the air cooling fan (18) is mounted on the bottom end of the support frame (17).

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