Anti-reflux mechanism for photovoltaic micro-inverse grid connection

Abstract

The utility model relates to an anti-reflux mechanism for photovoltaic micro-inverse grid connection, which belongs to the technical field of photovoltaic power generation grid-connected systems and comprises a cabinet body, a liquid cooling mechanism, a mounting mechanism, an air supply device, a drying bin and a PLC (programmable logic controller). The cabinet body is provided with ventilation holes and heat dissipation holes, and the internal installation mechanism achieves efficient heat dissipation through the liquid cooling groove and the circulating pump. The clamping mechanism adopts the design of an L-shaped fixing block and a spring, so that the inverter is convenient to install and maintain; a temperature and humidity sensor is arranged in the drying bin and cooperates with an air supply device to adjust the environment in the cabinet; the PLC realizes comprehensive control and coordinated operation; according to the utility model, through multiple heat dissipation and countercurrent prevention design, the stability and the service life of the system are improved, and the system is suitable for a photovoltaic micro-inverse grid-connected system.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic power generation grid-connected system technical field, more particularly to a kind of photovoltaic micro-inverter grid-connected with anti-backflow mechanism. BACKGROUND

[0002] As a kind of efficient, environmentally friendly energy utilization mode, photovoltaic power generation has been widely applied, and photovoltaic micro-inverter grid-connected system, as an important part of photovoltaic power generation, can convert the direct current generated by solar panels into alternating current matching the power grid, thereby realizing stable power supply to the power grid. In photovoltaic micro-inverter grid-connected system, when the electrical energy generated by solar panels exceeds the load demand, the excess electrical energy will flow back into the power grid through the inverter, which not only causes voltage fluctuation of the power grid, affecting the stable operation of the power grid, but also may cause damage to the power grid equipment and user equipment. In addition, the reverse flow phenomenon may also cause power grid harmonic pollution, reducing power quality. Moreover, photovoltaic micro-inverter generates a large amount of heat during operation, especially in high-temperature environments, the accumulation of heat will cause the internal temperature of the inverter to rise, and the high temperature will affect the performance and life of the inverter, and may even cause equipment failure.

[0003] In the prior art, a photovoltaic micro-inverter grid-connected anti-backflow mechanism with publication number CN220915248U overcomes the problem of photovoltaic inverter running outdoors and generating a large amount of heat, by setting an installation chamber and a liquid storage bin inside the cabinet, using the circulation of cooling liquid in the cooling tank, the delivery of cold air by the air pump, and the air flow of the heat dissipation assembly, to achieve multiple heat dissipation protection for the inverter, and equipped with temperature sensor and control circuit to intelligently control the cooling process. However, there are deficiencies in the integration and flexibility of the heat dissipation system, and there is a lack of comprehensive control of the entire heat dissipation and anti-backflow system, resulting in that the heat dissipation efficiency and anti-backflow effect cannot be dynamically optimized and adjusted according to the actual operating conditions, making it difficult to meet the dual requirements of efficient heat dissipation and precise anti-backflow of the inverter under complex environmental conditions. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem of overcoming the defects in the prior art and providing a photovoltaic micro-inverter grid-connected anti-backflow mechanism.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The photovoltaic micro-inverter grid-connected anti-backflow mechanism comprises a cabinet, the cabinet is hinged with a cabinet door, a handle is provided on the cabinet door, ventilation holes are provided on both sides of the cabinet, and heat dissipation holes are provided on the back side of the cabinet; an installation mechanism is provided inside the cabinet, liquid cooling mechanisms are provided on both sides of the installation mechanism, a partition is provided above the installation mechanism and the liquid cooling mechanisms, an air supply device and a drying bin are provided above the partition, the air supply device is provided on the inner wall of both sides of the cabinet, and a drying device is provided on the inside of the top of the cabinet.

[0007] The drying bin is provided with drying holes on two sides, and a temperature and humidity sensor is arranged in the interior of the drying bin.

[0008] The interior of the liquid cooling mechanism is provided with a refrigeration device, and the side close to the mounting mechanism is provided with a cooling liquid outlet and a cooling liquid inlet.

[0009] The mounting mechanism comprises a mounting shell, and a plurality of clamping mechanisms are arranged in the interior of the mounting mechanism.

[0010] The clamping mechanism comprises an L-shaped fixing block, and a pair of support blocks are arranged on the back side of the fixing block.

[0011] The interior of the mounting shell is provided with a plurality of mounting holes, and the support blocks and the springs are arranged in the interior of the mounting holes.

[0012] The interior of the shell of the mounting shell is provided with a liquid cooling tank, and an S-shaped liquid cooling pipeline is arranged in the liquid cooling tank.

[0013] The PLC controller is electrically connected with the air supply device, the drying device, the temperature and humidity sensor, the refrigeration device and the circulating pump.

[0014] The utility model has the following beneficial effects:

[0015] 1、The hinged structure of the cabinet body and the cabinet door and the handle facilitate the maintenance and overhaul of the equipment by the operating personnel, and the overall structure of the cabinet body enhances the protection performance of the equipment and can effectively resist the interference of the external environment.

[0016] 2、The liquid cooling mechanism circulates the cooling liquid in the liquid cooling tank and the liquid cooling pipeline of the mounting mechanism through the refrigeration device and the circulating pump, can quickly absorb the heat generated by the inverter and discharge it, significantly improves the heat dissipation efficiency, and ensures the stable operation of the inverter in a high-temperature environment.

[0017] 3、The package clamping mechanism adopts L-shaped fixing blocks, supporting blocks and springs, can quickly fix and disassemble the inverter, simplifies the installation and maintenance process, reduces the maintenance cost, and can adapt to inverters of different sizes, has good universality and adaptability, and the elastic support of the spring can effectively buffer the vibration generated by the inverter during operation, improve the operation stability of the equipment.

[0018] 4、The combination of the air supply device and the drying bin can effectively adjust the temperature and humidity environment in the cabinet body, the air supply device assists heat dissipation through air flow, and the temperature and humidity sensor in the drying bin can monitor the humidity in the cabinet body in real time, so that the equipment can run in a suitable environment, and equipment failure caused by high humidity is avoided.

[0019] 5、The PLC controller is electrically connected with the air supply device, the drying device, the temperature and humidity sensor, the refrigeration device and the circulating pump, intelligent control of the entire anti-backflow mechanism is realized, the PLC controller can automatically adjust the operation state of each equipment according to the real-time monitoring data through the preset control logic, and the system can run in the optimal working condition. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view of the utility model;

[0021] Figure 2 It is a back view of the utility model;

[0022] Figure 3 It is a schematic view of internal structure view one of the utility model;

[0023] Figure 4 It is a schematic view of internal structure view two of the utility model;

[0024] Figure 5 It is a schematic view of the drying bin;

[0025] Figure 6 It is a schematic view of internal structure of the utility model;

[0026] Figure 7 It is a schematic view of the package clamping mechanism;

[0027] Figure 8 It is a schematic view of the mounting mechanism;

[0028] Figure 9 It is a schematic view of the mounting mechanism;

[0029] Figure 10 It is a schematic view of the liquid cooling mechanism;

[0030] Figure 11 It is a schematic view of the electrical connection of the utility model.

[0031] Wherein: 1, cabinet; 2, cabinet door; 3, handle; 4, ventilation hole; 5, heat dissipation hole; 6, mounting mechanism; 7, liquid cooling mechanism; 8, air supply device; 9, drying bin; 10, drying device; 11, drying hole; 12, temperature and humidity sensor; 13, refrigeration device; 14, cooling liquid outlet; 15, cooling liquid inlet; 16, circulating pump; 17, clamping mechanism; 18, inverter; 19, fixed block; 20, support block; 21, spring; 22, mounting hole; 23, liquid cooling tank; 24, S-shaped liquid cooling pipeline; 25, liquid outlet. DETAILED DESCRIPTION

[0032] As Figures 1 to 11 shown, the anti-backflow mechanism for photovoltaic micro-inverter grid connection, including cabinet 1, cabinet 1 hinged with cabinet door 2, cabinet door 2 is equipped with handle 3, both sides of cabinet 1 is equipped with ventilation hole 4, the back side of cabinet 1 is equipped with heat dissipation hole 5;The inside of cabinet 1 is equipped with mounting mechanism 6, both sides of mounting mechanism 6 are equipped with liquid cooling mechanism 7, the upper side of mounting mechanism 6 and liquid cooling mechanism 7 is equipped with baffle, the upper side of baffle is equipped with air supply device 8 and drying bin 9, air supply device 8 is arranged on the inner wall of both sides of cabinet 1, the top inside of cabinet 1 is equipped with drying device 10.

[0033] Both sides of drying bin 9 are equipped with drying hole 11, the inside of drying bin 9 is equipped with temperature and humidity sensor 12.

[0034] The inside of liquid cooling mechanism 7 is equipped with refrigeration device 13, the side of liquid cooling mechanism 7 close to mounting mechanism 6 is equipped with cooling liquid outlet 14 and cooling liquid inlet 15, cooling liquid outlet 14 is arranged below cooling liquid inlet 15, cooling liquid outlet 14 is connected with circulating pump 16.

[0035] Mounting mechanism 6 includes mounting shell, the inside of mounting mechanism 6 is equipped with several clamping mechanisms 17, the inside of clamping mechanism 17 is installed with inverter 18.

[0036] Clamping mechanism 17 includes L-shaped fixed block 19, the back side of fixed block 19 is equipped with a pair of support blocks 20, the end of support block 20 away from fixed block is equipped with spring 21.

[0037] The inside of mounting shell is equipped with several mounting holes 22, support block 20 and spring 21 are arranged in the inside of mounting hole 22.

[0038] The inside of shell of mounting shell is equipped with liquid cooling tank 23, S-shaped liquid cooling pipeline 24 is arranged in liquid cooling tank 23, one end of liquid cooling pipeline 24 is connected with circulating pump 16, the other end is liquid outlet 25, liquid outlet 25 is connected with cooling liquid inlet 15 on liquid cooling mechanism 7.

[0039] It also includes PLC controller, PLC controller is electrically connected with air supply device 8, drying device 10, temperature and humidity sensor 12, refrigeration device 13, circulating pump 16.

[0040] Specifically, the cabinet body 1 is made of metal material and has good protection performance; the cabinet body 1 is provided with ventilation holes 4 on both sides and heat dissipation holes 5 on the back side, which can effectively promote the air circulation in the cabinet body, timely discharge heat and prevent overheating of the equipment; the cabinet body 1 is provided with a cabinet door 2 in a hinged manner, and the cabinet door 2 is provided with a handle 3, which facilitates the operation personnel to open the cabinet door for installation, maintenance and repair of the equipment.

[0041] Specifically, the cabinet body 1 is provided with an installation mechanism 6 inside, and the installation mechanism 6 is provided with a liquid cooling mechanism 7 on both sides; the installation mechanism 6 comprises an installation shell, and a plurality of clamping mechanisms 17 are arranged inside the installation shell for fixing inverters 18; the clamping mechanism 17 adopts an L-shaped fixing block 19, and a pair of support blocks 20 are arranged on the back side of the fixing block 19, and a spring 21 is arranged on the end of the support block 20 away from the fixing block 19, so that the inverter 18 can be quickly fixed and disassembled, and the clamping mechanism 17 can adapt to inverters of different sizes and has good universality and stability.

[0042] Specifically, the liquid cooling mechanism 7 is provided with a refrigeration device 13 inside, a cooling liquid outlet 14 and a cooling liquid inlet 15 are arranged on the side close to the installation mechanism 6, and the cooling liquid outlet 14 is connected with a circulating pump 16; a liquid cooling tank 23 is arranged inside the shell of the installation shell, an S-shaped liquid cooling pipeline 24 is arranged in the liquid cooling tank 23, one end of the liquid cooling pipeline 24 is connected with the circulating pump 16, the other end is an outlet 25, and the outlet 25 is connected with the cooling liquid inlet 15 of the liquid cooling mechanism 7; through the action of the refrigeration device 13 and the circulating pump 16, the cooling liquid circulates in the liquid cooling pipeline 24, absorbs the heat generated by the inverter 18 and discharges it, and high-efficiency heat dissipation is realized.

[0043] Specifically, a partition plate is arranged above the installation mechanism 6 and the liquid cooling mechanism 7, an air supply device 8 and a drying bin 9 are arranged above the partition plate; the air supply device 8 is arranged on the inner wall of both sides of the cabinet body 1, and air flow is used to assist heat dissipation, so as to further reduce the temperature in the cabinet body; the drying bin 9 is provided with drying holes 11 on both sides and is provided with a temperature and humidity sensor 12 inside, which can monitor the humidity in the cabinet body in real time; through the cooperation of the air supply device 8 and the drying bin 9, the temperature and humidity environment in the cabinet body can be effectively adjusted to prevent equipment failure caused by high humidity.

[0044] Specifically, the top inner side of the cabinet body 1 is provided with a drying device 10 for drying the inside of the cabinet body in a humid environment, further ensuring the operation environment of the equipment; in addition, a PLC controller is further included, and the PLC controller is electrically connected with the air supply device 8, the drying device 10, the temperature and humidity sensor 12, the refrigeration device 13 and the circulating pump 16. Through the intelligent control of the PLC controller, the operating state of each equipment can be automatically adjusted according to the real-time monitoring data, so as to ensure that the system operates in the optimal working condition.

[0045] Specifically, in actual operation, the inverter 18 is installed in the clamping mechanism 17 of the mounting mechanism 6; the refrigeration device 13 in the liquid cooling mechanism 7 is started, and the cooling liquid enters the liquid cooling pipeline 24 through the cooling liquid outlet 14 under the driving of the circulating pump 16, absorbs the heat generated by the inverter 18, and returns to the liquid cooling mechanism 7 from the liquid outlet 25 to complete a cycle; the air supply device 8 operates according to the instruction of the PLC controller, and cools through air flow; the temperature and humidity sensor 12 monitors the humidity in the cabinet in real time, and when the humidity exceeds the set value, the drying device 10 is started to dry the inside of the cabinet; the PLC controller automatically adjusts the operating state of the refrigeration device 13, the circulating pump 16, the air supply device 8 and the drying device 10 according to the feedback signal of each sensor, to ensure stable and efficient operation of the whole system.

[0046] Specifically, the air supply device 8, the drying device 10, the refrigeration device 13 and the circulating pump 16 are all arranged in pairs, and under the control of the PLC controller, reasonable work distribution can be made according to the overall situation, for example, by setting a temperature threshold value through the PLC controller, when the temperature signal detected by the temperature and humidity sensor 12 is lower than the set threshold value, the PLC controller controls the refrigeration device 13 and the circulating pump 16 on one side to work, when the temperature signal detected by the temperature and humidity sensor 12 is higher than the set threshold value, the PLC controller controls the refrigeration device 13 and the circulating pump 16 on both sides to work, and the same way is used to control the air supply device 8 and the drying device 10 when detecting humidity, which can not only provide a double-layer redundant mechanism to ensure the smooth operation of the equipment, but also save energy consumption under the corresponding circumstances.

Claims

1. A photovoltaic micro-inverter grid-connected anti-backflow mechanism, comprising a cabinet body (1), characterized in that, The cabinet body (1) is hinged with a cabinet door (2), the cabinet door (2) is provided with a handle (3), both sides of the cabinet body (1) are provided with ventilation holes (4), the back side of the cabinet body (1) is provided with a heat dissipation hole (5); the inside of the cabinet body (1) is provided with a mounting mechanism (6), both sides of the mounting mechanism (6) are provided with a liquid cooling mechanism (7), the top of the mounting mechanism (6) and the liquid cooling mechanism (7) is provided with a partition, the top of the partition is provided with a air supply device (8) and a drying bin (9), the air supply device (8) is arranged on the inner wall of both sides of the cabinet body (1), the top inside of the cabinet body (1) is provided with a drying device (10).

2. The anti-inrush mechanism for photovoltaic micro-inverter grid connection according to claim 1, characterized in that, Both sides of the drying bin (9) are provided with drying holes (11), the inside of the drying bin (9) is provided with a temperature and humidity sensor (12).

3. The anti-inrush mechanism for photovoltaic micro-inverter grid connection according to claim 2, characterized in that, The inside of the liquid cooling mechanism (7) is provided with a refrigeration device (13), one side of the liquid cooling mechanism (7) close to the mounting mechanism is provided with a cooling liquid outlet (14) and a cooling liquid inlet (15), the cooling liquid outlet (14) is arranged below the cooling liquid inlet (15), the cooling liquid outlet (14) is connected with a circulating pump (16).

4. The anti-inrush mechanism for photovoltaic micro-inverter grid connection according to claim 3, characterized in that, The mounting mechanism (6) comprises a mounting shell, the inside of the mounting mechanism (6) is provided with a plurality of clamping mechanisms (17), the inside of the clamping mechanism (17) is mounted with an inverter (18).

5. The anti-inrush mechanism for photovoltaic micro-inverter grid connection according to claim 4, characterized in that, The clamping mechanism (17) comprises an L-shaped fixing block (19), the back side of the fixing block (19) is provided with a pair of support blocks (20), one end of the support block (20) away from the fixing block (19) is provided with a spring (21).

6. The anti-inrush mechanism for photovoltaic micro-inverter grid connection according to claim 5, characterized in that, The inside of the mounting shell is provided with a plurality of mounting holes (22), the support block (20) and the spring (21) are arranged in the mounting hole (22).

7. The anti-inrush mechanism for photovoltaic micro-inverter grid connection according to claim 4, characterized in that, The inside of the shell of the mounting shell is provided with a liquid cooling tank (23), the liquid cooling tank (23) is provided with an S-shaped liquid cooling pipeline (24), one end of the liquid cooling pipeline (24) is connected with the circulating pump (16), the other end is a liquid outlet (25), the liquid outlet (25) is connected with the cooling liquid inlet (15) of the liquid cooling mechanism (7).

8. The anti-inrush mechanism for photovoltaic micro-inverter grid connection according to claim 3, characterized in that, It also includes a PLC controller, the PLC controller is electrically connected with the air supply device (8), the drying device (10), the temperature and humidity sensor (12), the refrigeration device (13) and the circulating pump (16).

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