Photovoltaic power generation grid-connected cabinet

Abstract

The utility model provides a photovoltaic power generation grid-connected cabinet. The photovoltaic power generation grid-connected cabinet comprises a cabinet body; the photovoltaic grid-connected equipment is arranged on the inner wall of the cabinet body; a plurality of wire inlet holes, wherein the plurality of wire inlet holes are formed in the cabinet body; a plurality of photovoltaic cables, the plurality of photovoltaic cables are all arranged on the photovoltaic grid-connected equipment, and the plurality of photovoltaic cables are all extended to the outside of the cabinet body; a plurality of grid-connected cables, the plurality of grid-connected cables are all arranged on the photovoltaic grid-connected equipment, and the plurality of grid-connected cables are all extended to the outside of the cabinet body; and the rainproof cover is fixedly installed on the cabinet body, and the installation position of the rainproof cover is corresponding to the plurality of wire inlet holes. The photovoltaic power generation grid-connected cabinet provided by the utility model has the advantages of air drying and cooling functions, convenience in replacement of a drying agent and high practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation grid-connected cabinets, in particular to a photovoltaic power generation grid-connected cabinet. Background Art

[0002] Photovoltaic power generation grid-connected cabinet is a switch cabinet with photovoltaic grid-connected equipment installed. Because it connects photovoltaic panels and power grid system, is equipped with complete grid-connected protection devices, and plays the role of photovoltaic generator grid connection, it is called "photovoltaic grid-connected cabinet".

[0003] However, existing photovoltaic power grid-connected cabinets often do not have air drying and cooling functions. Therefore, after being installed in relatively humid areas, the relatively humid local air will cause the electrical performance of the grid-connected equipment to decline, thereby affecting the service life of the grid-connected equipment and increasing the probability of failure of the grid-connected equipment.

[0004] Therefore, it is necessary to provide a photovoltaic power generation grid-connected cabinet to solve the above technical problems. Utility Model Content

[0005] In order to solve the technical problem that the existing photovoltaic power generation grid-connected cabinets often have no air drying and cooling functions, the utility model provides a photovoltaic power generation grid-connected cabinet.

[0006] The photovoltaic power generation grid-connected cabinet provided by the utility model comprises: a cabinet; a photovoltaic grid-connected device, which is arranged on the inner wall of the cabinet; a plurality of wire inlet holes, which are all opened on the cabinet; a plurality of photovoltaic cables, which are all arranged on the photovoltaic grid-connected device, and which extend to the outside of the cabinet; a plurality of grid-connected cables, which are all arranged on the photovoltaic grid-connected device, and which extend to the outside of the cabinet; a rain cover, which is fixedly installed on the cabinet, and the installation position of the rain cover corresponds to the plurality of wire inlet holes; a cooling mechanism, which is arranged on the cabinet, and which is used to cool the air in the cabinet; a drying mechanism, which is arranged on the cabinet, and which is used to dry the air in the cabinet; an air circulation mechanism, which is arranged on the cabinet, and which is used to circulate the air in the cabinet in the cooling mechanism and the drying mechanism.

[0007] Preferably, the cooling mechanism includes a cooling box, a spiral cooling pipe, a chiller, a water pump and a drain pipe. The cooling box is fixedly installed on the top of the cabinet. Coolant is provided in the cooling box and is arranged on the inner wall of the cooling box through the spiral cooling pipe. The chiller is fixedly installed on the top of the cooling box. The water pump and drain pipe are both arranged on the chiller. The water pump and drain pipe are both connected to the cooling box.

[0008] Preferably, the drying mechanism includes a drying box, a T-shaped plate, a metal woven net bag, granular desiccant and butterfly bolts. The drying box is fixedly mounted on the cabinet. A rectangular groove is provided on the drying box. A T-shaped plate is provided on the rectangular groove. A metal woven net bag is fixedly mounted on one side of the T-shaped plate. Granular desiccant is provided inside the metal woven net bag. A plurality of butterfly bolts are provided on the T-shaped plate. The plurality of butterfly bolts are all threadedly connected to the drying box.

[0009] Preferably, the air circulation mechanism includes a first air duct, a fan, a second air duct, a third air duct and a fourth air duct, the first air duct is arranged on the cabinet, the first air duct is connected to the drying box, the fan is fixedly installed on one side of the cabinet, the second air duct is arranged on the drying box, the second air duct is connected to the air inlet end of the fan, the third air duct is arranged at the air outlet end of the fan, the third air duct is connected to the spiral cooling pipe, the fourth air duct is arranged at one end of the spiral cooling pipe, and the fourth air duct is connected to the cabinet.

[0010] Preferably, a temperature and humidity sensor is provided on the top inner wall of the cabinet.

[0011] Preferably, the cabinet body is provided with a cabinet door.

[0012] Preferably, a controller is provided on the cabinet door, and the controller is electrically connected to the chiller, the fan and the temperature and humidity sensor.

[0013] Compared with the related technology, the photovoltaic power generation grid-connected cabinet provided by the utility model has the following advantages:

[0014] Beneficial effects:

[0015] The utility model provides a photovoltaic power generation grid-connected cabinet, which can connect photovoltaic power to the power grid through photovoltaic grid-connected equipment, multiple photovoltaic cables and multiple grid-connected cables, prevent rainwater from entering the cabinet along multiple line inlets through a rainproof cover, cool the air in the cabinet through a cooling mechanism, and thus avoid overheating failure of the photovoltaic grid-connected equipment, dry the air in the cabinet through a drying mechanism, thereby ensuring that the air humidity in the cabinet is lower than a preset threshold, thereby avoiding the problem of electrical performance degradation of the photovoltaic grid-connected equipment due to humid air, and the air circulation mechanism can make the air in the cabinet circulate in the cooling mechanism and the drying mechanism, monitor the temperature and humidity of the air in the cabinet through a temperature and humidity sensor, close the cabinet through a cabinet door, and control the chiller and the fan through a controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A schematic structural diagram of a preferred embodiment of a photovoltaic power generation grid-connected cabinet provided by the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the test cross-sectional structure;

[0018] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the drying mechanism.

[0019] Numbers in the figure: 1. Cabinet; 2. Photovoltaic grid-connected equipment; 3. Cable inlet; 4. Photovoltaic cable; 5. Grid-connected cable; 6. Rain cover; 7. Cooling box; 8. Spiral cooling pipe; 9. Chiller; 10. Suction pipe; 11. Drain pipe; 12. Drying box; 13. T-plate; 14. Metal woven net bag; 15. Granular desiccant; 16. Butterfly bolt; 17. First air duct; 18. Fan; 19. Second air duct; 20. Third air duct; 21. Fourth air duct; 22. Temperature and humidity sensor; 23. Cabinet door; 24. Controller. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0021] Please refer to Figure 1-3 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a photovoltaic power generation grid-connected cabinet provided by the utility model; Figure 2 for Figure 1 Schematic diagram of the test cross-sectional structure; Figure 3 for Figure 1Schematic diagram of the three-dimensional structure of the drying mechanism. The photovoltaic power generation grid-connected cabinet includes: a cabinet 1; a photovoltaic grid-connected device 2, the photovoltaic grid-connected device 2 is arranged on the inner wall of the cabinet 1; a plurality of wire inlet holes 3, the plurality of wire inlet holes 3 are all opened on the cabinet 1; a plurality of photovoltaic cables 4, the plurality of photovoltaic cables 4 are all arranged on the photovoltaic grid-connected device 2, and the plurality of photovoltaic cables 4 are all extended to the outside of the cabinet 1; a plurality of grid-connected cables 5, the plurality of grid-connected cables 5 are all arranged on the photovoltaic grid-connected device 2, and the plurality of grid-connected cables 5 are all extended to the outside of the cabinet 1; a rain cover 6, the rain cover 6 is fixedly installed on the cabinet 1, and the installation position of the rain cover 6 corresponds to the plurality of wire inlet holes 3; a cooling mechanism, the cooling mechanism is arranged on the cabinet 1, and the cooling mechanism is used to cool the air in the cabinet 1; a drying mechanism, the drying mechanism is arranged on the cabinet 1, the drying mechanism is used to dry the air in the cabinet 1; the air circulation mechanism, the air circulation mechanism is arranged on the cabinet 1, the air circulation mechanism is used to circulate the air in the cabinet 1 in the cooling mechanism and the drying mechanism, the photovoltaic power can be connected to the power grid through the photovoltaic grid-connected equipment 2, multiple photovoltaic cables 4 and multiple grid-connected cables 5, the rain cover 6 can prevent rainwater from entering the cabinet 1 along the multiple line inlet holes 3, the air in the cabinet 1 can be cooled by the cooling mechanism, thereby avoiding overheating failure of the photovoltaic grid-connected equipment 2, the air in the cabinet 1 can be dried by the drying mechanism, thereby ensuring that the air humidity in the cabinet 1 is lower than a preset threshold, thereby avoiding the problem of electrical performance degradation of the photovoltaic grid-connected equipment 2 due to humid air, and the air in the cabinet 1 can be circulated in the cooling mechanism and the drying mechanism through the air circulation mechanism.

[0022] The cooling mechanism includes a cooling box 7, a spiral cooling pipe 8, a chiller 9, a water pumping pipe 10 and a drain pipe 11. The cooling box 7 is fixedly installed on the top of the cabinet 1. Cooling liquid is arranged in the cooling box 7 and is arranged on the inner wall of the cooling box 7 through the spiral cooling pipe 8. The chiller 9 is fixedly installed on the top of the cooling box 7. The water pumping pipe 10 and the drain pipe 11 are both arranged on the chiller 9. The water pumping pipe 10 and the drain pipe 11 are both connected to the cooling box 7. The air in the cabinet 1 can be cooled by the cooling mechanism, thereby avoiding overheating failure of the photovoltaic grid-connected equipment 2.

[0023] The drying mechanism includes a drying box 12, a T-shaped plate 13, a metal woven net bag 14, a granular desiccant 15 and a butterfly bolt 16. The drying box 12 is fixedly installed on the cabinet 1. A rectangular groove is opened on the drying box 12, and a T-shaped plate 13 is arranged on the rectangular groove. A metal woven net bag 14 is fixedly installed on one side of the T-shaped plate 13. Granular desiccant 15 is arranged inside the metal woven net bag 14. A plurality of butterfly bolts 16 are arranged on the T-shaped plate 13, and the plurality of butterfly bolts 16 are threadedly connected to the drying box 12. The air in the cabinet 1 can be dried by the drying mechanism, so as to ensure that the air humidity in the cabinet 1 is lower than a preset threshold value, thereby avoiding the problem of electrical performance degradation of the photovoltaic grid-connected device 2 due to humid air.

[0024] The air circulation mechanism includes a first air duct 17, a fan 18, a second air duct 19, a third air duct 20 and a fourth air duct 21. The first air duct 17 is arranged on the cabinet 1, and the first air duct 17 is connected to the drying box 12. The fan 18 is fixedly installed on one side of the cabinet 1. The second air duct 19 is arranged on the drying box 12, and the second air duct 19 is connected to the air inlet end of the fan 18. The third air duct 20 is arranged at the air outlet end of the fan 18, and the third air duct 20 is connected to the spiral cooling pipe 8. The fourth air duct 21 is arranged at one end of the spiral cooling pipe 8, and the fourth air duct 21 is connected to the cabinet 1. The air in the cabinet 1 can be circulated in the cooling mechanism and the drying mechanism through the air circulation mechanism.

[0025] A temperature and humidity sensor 22 is disposed on the top inner wall of the cabinet 1 , and the temperature and humidity of the air in the cabinet 1 can be monitored by the temperature and humidity sensor 22 .

[0026] The cabinet body 1 is provided with a cabinet door 23 , through which the cabinet body 1 can be closed.

[0027] The cabinet door 23 is provided with a controller 24 , and the controller 24 is electrically connected to the water chiller 9 , the fan 18 and the temperature and humidity sensor 22 . The water chiller 9 and the fan 18 can be controlled by the controller 24 .

[0028] The working principle of the photovoltaic power generation grid-connected cabinet provided by the utility model is as follows:

[0029] The photovoltaic grid-connected device 2 can be connected to the multiple photovoltaic panels through multiple photovoltaic cables 4, so that the electric energy converted by the photovoltaic panels is transmitted to the photovoltaic grid-connected device 2 for boosting and inversion, and then connected to the power grid through multiple grid-connected cables 5;

[0030] The air temperature and humidity in the cabinet 1 are monitored by the temperature and humidity sensor 22. When the air temperature in the cabinet 1 is too high, the chiller 9 is started. The chiller 9 extracts the coolant in the cooling box 7 through the pumping pipe 10 and re-injects it into the cooling box 7 through the drain pipe 11, thereby cooling the coolant in the cooling box 7. The fan 18 is started. The air in the cabinet 1 enters the spiral cooling pipe 8 along the first air duct 17, the drying box 12, the second air duct 19 and the third air duct 20 through the operation of the fan 18. When the air enters the spiral cooling pipe 8 with a lower temperature, the temperature of the air will drop. The cooled air is re-discharged into the cabinet 1 along the fourth air duct 21, thereby cooling the air in the cabinet 1, thereby avoiding overheating failure of the photovoltaic grid-connected device 2. At the same time, when the airflow in the cabinet 1 passes through the drying box 12, the granular desiccant 15 in the metal woven mesh bag 14 can dry the air, thereby ensuring that the air humidity in the cabinet 1 is lower than the preset threshold, thereby avoiding the problem of electrical performance degradation of the photovoltaic grid-connected device 2 due to humid air.

[0031] Compared with the related technology, the photovoltaic power generation grid-connected cabinet provided by the utility model has the following advantages:

[0032] Beneficial effects:

[0033] The utility model provides a photovoltaic power generation grid-connected cabinet, which can connect photovoltaic power to the power grid through photovoltaic grid-connected equipment 2, multiple photovoltaic cables 4 and multiple grid-connected cables 5, prevent rainwater from entering the cabinet 1 along multiple line inlets 3 through a rain cover 6, cool the air in the cabinet 1 through a cooling mechanism, and thus avoid overheating of the photovoltaic grid-connected equipment 2, dry the air in the cabinet 1 through a drying mechanism, thereby ensuring that the air humidity in the cabinet 1 is lower than a preset threshold, thereby avoiding the problem of electrical performance degradation of the photovoltaic grid-connected equipment 2 due to humid air, and circulate the air in the cabinet 1 in the cooling mechanism and the drying mechanism through an air circulation mechanism, monitor the temperature and humidity of the air in the cabinet 1 through a temperature and humidity sensor 22, close the cabinet 1 through a cabinet door 23, and control the chiller 9 and the fan 18 through a controller 24.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A photovoltaic power generation grid-connected cabinet, characterized in that: include: Cabinet; Photovoltaic grid-connected equipment, the photovoltaic grid-connected equipment is arranged on the inner wall of the cabinet; A plurality of wire inlet holes, wherein the plurality of wire inlet holes are all provided on the cabinet body; A plurality of photovoltaic cables, wherein the plurality of photovoltaic cables are arranged on the photovoltaic grid-connected device, and the plurality of photovoltaic cables extend to the outside of the cabinet; A plurality of grid-connected cables, wherein the plurality of grid-connected cables are all arranged on the photovoltaic grid-connected equipment, and the plurality of grid-connected cables are all extended to the outside of the cabinet; A rain cover, the rain cover is fixedly mounted on the cabinet, and the mounting position of the rain cover corresponds to the plurality of wire inlet holes; A cooling mechanism, the cooling mechanism is arranged on the cabinet, and the cooling mechanism is used to cool the air in the cabinet; A drying mechanism, the drying mechanism is arranged on the cabinet, and the drying mechanism is used to dry the air in the cabinet; An air circulation mechanism is arranged on the cabinet and is used to circulate the air in the cabinet in the cooling mechanism and the drying mechanism.

2. The photovoltaic power generation grid-connected cabinet according to claim 1, characterized in that: The cooling mechanism includes a cooling box, a spiral cooling pipe, a chiller, a water pump and a drain pipe. The cooling box is fixedly installed on the top of the cabinet. Coolant is arranged in the cooling box and is arranged on the inner wall of the cooling box through the spiral cooling pipe. The chiller is fixedly installed on the top of the cooling box. The water pump and the drain pipe are both arranged on the chiller. The water pump and the drain pipe are both connected to the cooling box.

3. The photovoltaic power generation grid-connected cabinet according to claim 2, characterized in that: The drying mechanism includes a drying box, a T-shaped plate, a metal woven net bag, granular desiccant and butterfly bolts. The drying box is fixedly installed on the cabinet. A rectangular groove is opened on the drying box, and a T-shaped plate is arranged on the rectangular groove. A metal woven net bag is fixedly installed on one side of the T-shaped plate, and granular desiccant is arranged inside the metal woven net bag. A plurality of butterfly bolts are arranged on the T-shaped plate, and the plurality of butterfly bolts are all threadedly connected to the drying box.

4. The photovoltaic power generation grid-connected cabinet according to claim 3, characterized in that: The air circulation mechanism includes a first air duct, a fan, a second air duct, a third air duct and a fourth air duct, wherein the first air duct is arranged on the cabinet, the first air duct is connected to the drying box, the fan is fixedly installed on one side of the cabinet, the second air duct is arranged on the drying box, the second air duct is connected to the air inlet end of the fan, the third air duct is arranged at the air outlet end of the fan, the third air duct is connected to the spiral cooling pipe, the fourth air duct is arranged at one end of the spiral cooling pipe, and the fourth air duct is connected to the cabinet.

5. The photovoltaic power generation grid-connected cabinet according to claim 4, characterized in that: A temperature and humidity sensor is arranged on the top inner wall of the cabinet.

6. The photovoltaic power generation grid-connected cabinet according to claim 5, characterized in that: The cabinet body is provided with a cabinet door.

7. The photovoltaic power generation grid-connected cabinet according to claim 6, characterized in that: A controller is provided on the cabinet door, and the controller is electrically connected to the chiller, the fan and the temperature and humidity sensor.

Images