Photovoltaic grid-connected cabinet

Abstract

The present invention relates to the technical field of photovoltaic power equipment, and discloses a photovoltaic grid-connected cabinet, including a cabinet support and an outer shell, wherein a plurality of breathing plates are fixedly installed inside the cabinet support, and the plurality of breathing plates divide the inner cavity of the cabinet support into different installation chambers, and the breathing plate includes a base plate and a plurality of heat-conducting blocks, wherein the plurality of heat-conducting blocks are embedded in the inner surface of the base plate, and a flow guide pipe is embedded inside the base plate, and the flow guide pipe passes through the heat-conducting block and is fixedly connected, and a plurality of heat-conducting blocks are connected in series, and a breathing cavity is opened inside the heat-conducting block. The photovoltaic grid-connected cabinet adopts a breathing plate as a cabinet partition, and the opening and closing of the breathing cavity can be adjusted by controlling the expansion and contraction of a telescopic ball, so that the grid-connected cabinet not only has the function of blocking external dust and high temperature, but also has the function of one-way ventilation and heat dissipation. Since a monitoring component is arranged inside the breathing plate, the grid-connected cabinet has the function of discharging internal hot air nearby, reducing heat dissipation energy consumption, and being more environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power equipment, and in particular to a photovoltaic grid-connected cabinet. Background Art

[0002] With the large-scale development of distributed photovoltaic power generation, photovoltaic grid-connected cabinets are being used more and more. In order to improve the heat dissipation performance of photovoltaic grid-connected cabinets, a patent document with announcement number CN117254369A discloses a photovoltaic grid-connected cabinet, including a cabinet body and a heat dissipation component. The cabinet body has an installation cavity. The heat dissipation component includes a heat dissipation piston, a heat dissipation screw, multiple one-way valves 1 and multiple one-way valves 2. The cabinet body is provided with a sealed cavity. The inner wall of the sealed cavity is provided with multiple air outlets. The one-way valve 1 is connected to the inner wall of the air outlet. The inner wall of the sealed cavity away from the air outlet is provided with multiple air inlet holes. The one-way valve 2 is connected to the inner wall of the air inlet. The heat dissipation screw is rotatably connected to the inner wall of the sealed cavity. The heat dissipation piston is threadedly connected to the outer wall of the heat dissipation screw. The rotation of the heat dissipation screw drives the heat dissipation piston to slide on the inner wall of the sealed cavity. In the present application, the heat dissipation screw, one-way valve 1, one-way valve 2 and heat dissipation piston are arranged to perform heat exchange between the air in the installation cavity and the electrical components, thereby achieving cooling of the electrical components, making it less likely for the electrical components to be damaged by operating in a high temperature state for a long time, thereby extending the service life of the photovoltaic grid-connected cabinet.

[0003] The above solution requires a lot of power to work the heat dissipation piston, and it is also necessary to ensure the continuous movement of the heat dissipation piston to discharge the hot air in the cabinet. It is not economical to use. Based on this, the existing photovoltaic grid-connected cabinets still need to rely on high energy consumption for heat dissipation, which is not conducive to widespread promotion and application in the market. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a photovoltaic grid-connected cabinet.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a photovoltaic grid-connected cabinet, comprising a cabinet support and an outer shell, wherein a plurality of breathing plates are fixedly installed inside the cabinet support, and the plurality of breathing plates divide the inner cavity of the cabinet support into different installation chambers, and the outer shell is assembled from a plurality of metal plates, wherein the plurality of metal plates are respectively fixedly installed on the left and right sides, the top and the rear side surface of the cabinet support, and the surface of each metal plate is provided with heat dissipation holes;

[0006] The breathing plate comprises a base plate and a plurality of heat-conducting blocks, wherein the plurality of heat-conducting blocks are embedded in the inner surface of the base plate, a flow guide pipe is embedded in the interior of the base plate, the flow guide pipe passes through the heat-conducting blocks and is fixedly connected, and a plurality of heat-conducting blocks are connected in series, a breathing cavity is provided in the interior of the heat-conducting blocks, an input hole and an output hole are provided on both sides of the heat-conducting blocks, anti-backflow sheets are movably installed in the interior of the input hole and the output hole, and the input hole and the output hole are both connected with the breathing cavity, an exhaust hole is provided on the outer surface of the base plate, the exhaust hole is aligned with the output hole, a telescopic ball is provided in the interior of the breathing cavity, the flow guide pipe connects the inner cavities of the plurality of telescopic balls in series, an intermittent pumping mechanism is fixedly installed in the interior of the cabinet bracket, the intermittent pumping mechanism transports the flow medium to the flow guide pipe, controls the expansion or contraction of the telescopic ball, and has the function of discharging the internal hot air, so that the cabinet made by adopting the breathing plate has a good heat dissipation effect and is more environmentally friendly to use.

[0007] Preferably, a plurality of monitoring components are embedded inside the heat conductive block, and the plurality of monitoring components are arranged in a circular array around the breathing cavity. The telescopic ball is an elliptical capsule structure, and both ends of the long axis of the telescopic ball are respectively fixedly connected to the inner wall of the breathing cavity, and a plurality of magnetic sheets are embedded in the outer wall of the telescopic ball.

[0008] Among them, the monitoring component includes an induction coil. When the telescopic ball expands and contracts, the magnetic sheet moves back and forth, causing the induction coil to cut the magnetic field lines of the magnetic sheet, and the electrodes at both ends of the induction coil generate changing electromotive force.

[0009] The monitoring component also includes a memory metal belt. A sliding groove is provided inside the heat conductive block. One end of the memory metal belt is fixedly connected to the sliding groove. A movable electrode is fixedly installed on the other end of the memory metal belt. A plurality of fixed electrodes are fixedly installed on the surface of the induction coil. The plurality of fixed electrodes are arranged in a straight line to form a conductive slide rail. When the movable electrode slides along the sliding groove, the movable electrode slides in contact with the conductive slide rail, so that the movable electrode is electrically conductive with any fixed electrode. The monitoring component has the function of detecting high temperature and fault location, as well as the function of executing control instructions, providing conditions for remote control and greatly improving the intelligence level of the grid-connected cabinet.

[0010] Preferably, the intermittent pumping mechanism includes a mounting base, on the upper side of which a pumping cylinder and an electric telescopic rod are fixedly mounted, a piston is slidably mounted inside the pumping cylinder, a transmission connecting rod is fixedly mounted on the upper side of the piston, and the electric telescopic rod drives the piston to slide reciprocatingly up and down in the pumping cylinder through the transmission connecting rod, a multi-way joint seat is fixedly mounted on the bottom end of the pumping cylinder, an output joint and a first input joint are fixedly mounted on the surface of the multi-way joint seat, the output joint is connected to the top end of the guide pipe through a first pipe, a liquid storage tank is fixedly mounted inside the cabinet bracket, and the first input joint is connected to the liquid storage tank through a second pipe.

[0011] A second input connector is also fixedly mounted on the surface of the multi-way connector seat, and the mouth of the second input connector is connected to the air supply main pipe. One-way valves are arranged inside the output connector, the first input connector, and the second input connector, so as to intermittently inject coolant and air into the telescopic ball to assist in cooling the telescopic ball. The telescopic ball is affected by the changing internal pressure difference, expands or contracts in the breathing cavity, and achieves the effect of actively discharging hot air.

[0012] Preferably, there are multiple pumping cylinders, the first input connectors on the lower sides of the multiple pumping cylinders are all connected to the second pipeline, the second input connectors on the lower sides of the multiple pumping cylinders are all connected to the air supply main pipe, an assembly plate is fixedly installed on the top of the transmission connecting rods on the upper sides of the multiple pumping cylinders, the telescopic end of the electric telescopic rod is fixedly connected to the assembly plate, and the multi-way connector seats on the lower sides of the multiple pumping cylinders have more output connectors so as to be connected to breathing plates at different positions through the first pipeline.

[0013] Preferably, a heat dissipation fan is installed in the upper end or / and the lower end of the cabinet support, and the heat dissipation fan conveys air to the installation room of the grid-connected cabinet to dissipate heat for the grid-connected cabinet.

[0014] The present invention has the following beneficial effects:

[0015] 1. The photovoltaic grid-connected cabinet adopts a breathing plate as a cabinet partition, and the opening and closing of the breathing cavity can be adjusted by controlling the expansion and contraction of the telescopic ball, so that the grid-connected cabinet not only has the function of blocking external dust and high temperature, but also has the function of one-way ventilation and heat dissipation, achieving a good heat dissipation effect.

[0016] 2. The photovoltaic grid-connected cabinet generates a lot of heat because the electrical components in the cabinet are relatively concentrated or near the electrical components running at high load, so the temperature in the cabinet is uneven. If the air in the high-temperature area is not discharged nearby in time, the flow of air will cause the overall temperature in the cabinet to rise, increasing the difficulty and cost of heat dissipation.

[0017] A number of heat-conducting blocks are arranged on the breathing plate, and a monitoring component is arranged in each heat-conducting block. The memory metal belt near the heat source becomes longer due to the heat, and pushes the movable electrode to slide along the conductive slide rail. That is, after the movable electrode is connected to the fixed electrode, the number of turns of the conductive induction coil increases, and the measured electromotive force value of the induction coil becomes larger, so as to judge and determine the heat-conducting block near the heat source. The induction coil in the heat-conducting block at the non-heat source position is energized, and the induction coil generates magnetic force to adsorb the telescopic ball. The telescopic ball expands and blocks the breathing cavity, so that the heat-conducting block at this location is in an exhaust closed state. The exhaust capacity here is reduced, so that the air in the low-temperature area of ​​the cabinet flows to the high-temperature area, and the heat diffusion is suppressed. The air in the cabinet is discharged only by the heat-conducting blocks near the heat source. That is, the grid-connected cabinet has the function of discharging the internal hot air nearby, reducing the heat dissipation energy consumption and being more environmentally friendly. The monitoring component has the function of detecting and executing control instructions, providing conditions for remote control.

[0018] 3. The photovoltaic grid-connected cabinet is provided with an intermittent pumping mechanism and a liquid storage tank. The intermittent pumping mechanism can pump the coolant and air into the telescopic ball at a fixed frequency in the order of liquid first and air later. The coolant introduced first accelerates the cooling of the telescopic ball and drives the telescopic ball to expand at the same time. The air introduced later can discharge the coolant in the telescopic ball so that the telescopic ball shrinks and becomes smaller, so that the telescopic ball can expand and contract at a certain frequency, thereby improving the ability to actively discharge hot air in the cabinet. Since the frequency of the expansion and contraction of the telescopic ball is positively correlated with the pumping frequency of the intermittent pumping mechanism, the efficiency of the grid-connected cabinet to exhaust heat nearby can be controlled by controlling the pumping frequency of the intermittent pumping machine, thereby providing the hardware basic conditions for intelligent remote control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention (I);

[0020] Figure 2 This is a partially enlarged three-dimensional structural diagram of the breathing plate;

[0021] Figure 3 This is a schematic diagram of the partial rear section structure of the breathing plate;

[0022] Figure 4 for Figure 3 A schematic diagram of a local enlarged structure;

[0023] Figure 5 It is a schematic diagram of the top-down section (and partial enlargement) structure of the heat conducting block;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the present invention (II);

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the intermittent pumping mechanism and the liquid storage tank;

[0026] Figure 8 It is a schematic diagram of the side section structure of the intermittent pumping mechanism;

[0027] Fig. 9 A schematic diagram of the pipe connection between the breathing plate, the intermittent pumping mechanism and the liquid storage tank;

[0028] Fig.10 It is a schematic diagram of the rear section of the breathing board (schematic diagram of the telescopic ball changes).

[0029] In the figure: 1 cabinet bracket, 2 outer shell, 3 breathing plate, 4 base plate, 5 heat conductive block, 6 guide tube, 7 breathing chamber, 8 input hole, 9 output hole, 10 anti-backflow sheet, 11 exhaust hole, 12 telescopic ball, 13 liquid storage tank, 14 mounting base, 15 pumping cylinder, 16 electric telescopic rod, 17 piston, 18 transmission connecting rod, 19 multi-way joint seat, 20 output joint, 21 first input joint, 22 first pipeline, 23 second pipeline, 24 second input joint, 25 gas supply main pipe, 26 one-way valve, 27 overflow pipe, 28 exhaust pipe, 29 return pipe joint, 30 third pipeline, 31 magnetic sheet, 32 induction coil, 33 memory metal belt, 34 movable electrode, 35 fixed electrode. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Reference Figure 1-10 A photovoltaic grid-connected cabinet includes a cabinet support 1 and an outer shell 2. A plurality of breathing plates 3 are fixedly installed inside the cabinet support 1. The plurality of breathing plates 3 divide the inner cavity of the cabinet support 1 into different installation chambers. The outer shell 2 is assembled from a plurality of metal plates. The plurality of metal plates are respectively fixedly installed on the left and right sides, the top and the rear surface of the cabinet support 1, and the surface of each metal plate is provided with heat dissipation holes.

[0033] A heat dissipation fan is installed in the upper end or / and the lower end of the cabinet support 1, which is a conventional arrangement and is not shown in the drawings. The heat dissipation fan delivers air to the installation room of the grid-connected cabinet.

[0034] The breathing plate 3 includes a base plate 4 and a plurality of heat-conducting blocks 5, wherein the plurality of heat-conducting blocks 5 are embedded in the inner surface of the base plate 4, a flow guide tube 6 is embedded inside the base plate 4, the flow guide tube 6 passes through the heat-conducting block 5 and is fixedly connected to connect the plurality of heat-conducting blocks 5 in series, the heat-conducting block 5 and the flow guide tube 6 can be made of copper or aluminum, a breathing cavity 7 is provided inside the heat-conducting block 5, an input hole 8 and an output hole 9 are provided on both sides of the heat-conducting block 5, anti-backflow sheets 10 are movably installed inside the input hole 8 and the output hole 9, and the input hole 8 and the output hole 9 are both connected to the breathing cavity 7, an exhaust hole 11 is provided on the outer surface of the base plate 4, the exhaust hole 11 is aligned with the output hole 9, a telescopic ball 12 is provided inside the breathing cavity 7, the flow guide tube 6 connects the inner cavities of the plurality of telescopic balls 12 in series, an intermittent pumping mechanism is fixedly installed inside the cabinet bracket 1, and the intermittent pumping mechanism transports a flowing medium (water or coolant, etc.) to the flow guide tube 6.

[0035] Under normal conditions, the telescopic ball 12 is in a contracted state, and the heat dissipation fan delivers air to the installation room of the grid-connected cabinet, forming an air pressure difference inside and outside the cabinet. The air inside the cabinet pushes the anti-backflow sheet 10 in the input hole 8 and enters the breathing cavity 7. The fluid medium is delivered to the telescopic ball 12 through the guide pipe 6. The internal pressure of the telescopic ball 12 is maximized, and the expanded telescopic ball 12 fits the inner wall of the breathing cavity 7, squeezing the air in the breathing cavity 7 out from the output hole 9. Figure 4 .

[0036] Specifically, the intermittent pumping mechanism includes a mounting base 14, on the upper side of which a pumping cylinder 15 and an electric telescopic rod 16 are fixedly mounted, a piston 17 is slidably mounted inside the pumping cylinder 15, a transmission connecting rod 18 is fixedly mounted on the upper side of the piston 17, and the electric telescopic rod 16 drives the piston 17 to slide reciprocatingly up and down in the pumping cylinder 15 through the transmission connecting rod 18, a multi-way joint seat 19 is fixedly mounted on the bottom end of the pumping cylinder 15, an output joint 20 and a first input joint 21 are fixedly mounted on the surface of the multi-way joint seat 19, the output joint 20 is connected to the top end of the guide pipe 6 through a first pipe 22, a liquid storage tank 13 is fixedly mounted inside the cabinet bracket 1, and the first input joint 21 is connected to the liquid storage tank 13 through a second pipe 23, refer to Figure 8 , Fig. 9 .

[0037] The surface of the multi-way connector seat 19 is also fixedly mounted with a second input connector 24, the mouth of which is connected to a gas supply main pipe 25, and the insides of the output connector 20, the first input connector 21 and the second input connector 24 are all provided with a one-way valve 26, and the one-way valve 26 is one-way. Figure 8As shown by the dotted arrow, an overflow pipe 27 is fixedly installed on the upper end surface of the pumping cylinder 15, and the overflow pipe 27 is connected to the upper space of the piston 17. An exhaust pipe 28 and a return pipe joint 29 are fixedly installed on the upper end surface of the liquid storage tank 13, and the return pipe joint 29 is connected to the lower end of the guide pipe 6 through a third pipe 30. Fig. 9 shown.

[0038] refer to Figure 8 When the piston 17 moves upward, a certain proportion of air and coolant are sucked into the pumping cylinder 15. When the piston 17 moves downward, the coolant and air are pumped into the telescopic ball 12 through the first pipe 22. Finally, the coolant and air flow back to the liquid storage tank 13 through the third pipe 30.

[0039] There are multiple pumping cylinders 15, and the first input connectors 21 on the lower sides of the multiple pumping cylinders 15 are all connected to the second pipeline 23, and the second input connectors 24 on the lower sides of the multiple pumping cylinders 15 are all connected to the air supply main 25. An assembly plate is fixedly installed on the top of the transmission connecting rod 18 on the upper side of the multiple pumping cylinders 15, and the telescopic end of the electric telescopic rod 16 is fixedly connected to the assembly plate. The multi-way connector seat 19 on the lower side of the multiple pumping cylinders 15 has more output connectors 20, so as to be connected to the breathing plates 3 at different positions through the first pipeline 22.

[0040] By providing an intermittent pumping mechanism and a liquid storage tank 13, the intermittent pumping mechanism can pump the coolant and air into the telescopic ball 12 at a fixed frequency in the order of liquid first and air later. The coolant introduced first accelerates the cooling of the telescopic ball 12 and drives the telescopic ball 12 to expand. The air introduced later can discharge the coolant in the telescopic ball 12, and the emptied telescopic ball 12 is easy to shrink, so that the telescopic ball 12 shrinks and becomes smaller, so that the telescopic ball 12 can expand and contract at a certain frequency. Fig.10 As shown in (a→b→c), the ability to actively discharge hot air in the cabinet is improved. Since the frequency of the expansion and contraction of the telescopic ball 12 is positively correlated with the pumping frequency of the intermittent pumping mechanism, the efficiency of active heat discharge of the grid-connected cabinet can be controlled by controlling the pumping frequency of the intermittent pumping machine, providing the hardware basis for intelligent remote control.

[0041] In this embodiment, Figure 5 As shown, a plurality of monitoring components are embedded in the interior of the heat conductive block 5, and the plurality of monitoring components are arranged in a ring array around the breathing cavity 7. The telescopic ball 12 is an elliptical capsule structure, and both ends of the long axis of the telescopic ball 12 are respectively fixedly connected to the inner wall of the breathing cavity 7, and a plurality of magnetic sheets 31 are embedded in the outer wall of the telescopic ball 12.

[0042] The monitoring component includes an induction coil 32. According to the electromagnetic induction phenomenon, during the expansion and contraction of the telescopic ball 12, the magnetic sheet 31 moves back and forth, causing the induction coil 32 to cut the magnetic field lines of the magnetic sheet 31. The electrodes at both ends of the induction coil 32 generate a changing electromotive force. By testing the electromotive force value of the induction coil 32, it is possible to remotely monitor whether the exhaust of each heat-conducting block 5 is smooth. For example, if the tested electromotive force value is abnormal, it can be determined whether the exhaust of each heat-conducting block 5 is blocked. Alternatively, since the blockage in the breathing cavity 7 hinders the expansion of the telescopic ball 12, the movement range of the magnetic sheet 31 is limited, and the induction coil 32 cannot cut the magnetic field lines of the magnetic sheet 31. The electromotive force value tested for the induction coil 32 is small, and it can be determined that one or more heat-conducting blocks 5 at the abnormal location are blocked. In summary, by detecting the electromotive force value of the induction coil 32, the exhaust condition of the heat-conducting block 5 can be monitored, and the position of the blocked heat-conducting block 5 can be accurately determined, which is convenient for later maintenance.

[0043] In this embodiment, Figure 5 As shown, the monitoring component also includes a memory metal belt 33, which is made of a memory metal material and is in a compressed belt-shaped structure. When heated, the memory metal belt 33 returns to its original length, that is, it has the characteristics of shrinking when cooled and expanding when heated. A sliding groove is opened inside the heat conductive block 5, one end of the memory metal belt 33 is fixedly connected to the sliding groove, and a movable electrode 34 is fixedly installed on the other end of the memory metal belt 33. A plurality of fixed electrodes 35 are fixedly installed on the surface of the induction coil 32, and the plurality of fixed electrodes 35 are arranged in a straight line to form a conductive slide rail. When the memory metal belt 33 expands due to heat and pushes the movable electrode 34 to slide along the sliding groove, the movable electrode 34 slides in contact with the conductive slide rail, so that the movable electrode 34 is electrically conductive with any fixed electrode 35.

[0044] According to Faraday's law of electromagnetic induction, E = nΔΦ / Δt (E: induced electromotive force (V), n: number of turns of the induction coil, ΔΦ / Δt: rate of change of magnetic flux), refer to Figure 5 As shown, when the movable electrode 34 moves upward and is connected to the fixed electrode 35 at different positions, the number of turns n of the induction coil 32 increases, and the induced electromotive force between the bottom end of the induction coil 32 and the movable electrode 34 also increases accordingly. By measuring the induced electromotive force, the temperature change in the breathing chamber 7 can be monitored.

[0045] Because more heat is generated in places where electrical components are relatively concentrated in the cabinet, or near electrical components running at high load, the temperature in the cabinet is uneven. If the air in the high-temperature area is not discharged nearby in time, the flow of air will cause the overall temperature in the cabinet to rise, increasing the difficulty and cost of heat dissipation.

[0046] A plurality of heat-conducting blocks 5 are arranged on the breathing plate 3, and a monitoring component is arranged in each heat-conducting block 5. The memory metal belt 33 near the heat source position becomes longer due to heat, and pushes the movable electrode 34 to slide along the conductive slide rail, that is, after the movable electrode 34 is connected to the fixed electrode 35, the number of turns of the conductive induction coil 32 increases, and the electromotive force value of the induction coil 32 becomes larger, so as to judge and determine the heat-conducting block 5 near the heat source position, and energize the induction coil 32 in the heat-conducting block 5 at the non-heat source position, and the induction coil 32 in the heat-conducting block 5 generates a magnetic force to attract and stretch. The telescopic ball 12 expands and fits the inner wall of the breathing cavity 7, blocking the breathing cavity 7, so that the heat conductive block 5 at this location is in an exhaust closed state. The exhaust capacity here is reduced, while the telescopic ball 12 in the breathing cavity 7 near the high-temperature area expands and contracts normally to exhaust air, so that the air in the low-temperature area of ​​the cabinet flows to the high-temperature area, inhibiting heat diffusion, and achieving the goal of exhausting the air in the cabinet only by using the heat conductive block 5 close to the heat source. That is, the grid-connected cabinet has the function of exhausting the internal hot air nearby, reducing heat dissipation energy consumption, and being more environmentally friendly.

[0047] It should be noted that the temperature of the heat conductive block 5 near the heat source is high, the induction coil 32 near this place is not energized, the telescopic ball 12 is not attracted by the electromagnetic field of the induction coil 32, and the intermittent pumping mechanism controls its normal contraction and expansion changes. The breathing cavity 7 at this place is in an open state, and the induction coil 32 in other ranges of the heat conductive block 5 is introduced with current, and the telescopic ball 12 in its breathing cavity 7 is attracted by the electromagnetic field of the induction coil 32 and expands. The breathing cavity 7 at this place is blocked by the telescopic ball 12 and is in a closed state. The air in the cabinet is discharged from the open breathing cavity 7 with small resistance, so the function of discharging hot air nearby is realized to prevent hot air from diffusing in the cabinet.

[0048] The photovoltaic grid-connected cabinet adopts a breathing plate 3 provided with a monitoring component as a cabinet partition, and can adjust the opening and closing of the breathing chamber 7 by controlling the expansion and contraction of the telescopic ball 12, so that the grid-connected cabinet not only has the function of blocking external dust and high temperature, but also has the function of one-way ventilation and heat dissipation, thereby achieving a good heat dissipation effect. By detecting the induced electromotive force of the induction coil 32, the position of the high-temperature area of ​​the grid-connected cabinet can be conveniently determined, and then a control current is introduced into the induction coil 32 in the non-high-temperature area to close the exhaust path of the non-high-temperature area, thereby realizing nearby exhaust and heat dissipation through the breathing chamber 7 near the high-temperature area. The monitoring component has the function of detecting high temperature and fault location, as well as the function of executing control instructions, thereby providing conditions for remote control, greatly improving the intelligence level of the grid-connected cabinet, and making it more convenient to use.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A photovoltaic grid-connected cabinet, comprising a cabinet support (1) and an outer shell (2), characterized in that: A plurality of breathing plates (3) are fixedly installed inside the cabinet support (1), and the plurality of breathing plates (3) divide the inner cavity of the cabinet support (1) into different installation chambers. The outer shell (2) is assembled from a plurality of metal plates, and the plurality of metal plates are respectively fixedly installed on the left and right sides, the top and the rear surface of the cabinet support (1), and the surface of each metal plate is provided with heat dissipation holes; The breathing plate (3) comprises a base plate (4) and a plurality of heat-conducting blocks (5), wherein the plurality of heat-conducting blocks (5) are embedded in the inner surface of the base plate (4), a flow guide tube (6) is embedded in the interior of the base plate (4), the flow guide tube (6) passes through the heat-conducting blocks (5) and is fixedly connected, so that the plurality of heat-conducting blocks (5) are connected in series, a breathing cavity (7) is provided in the interior of the heat-conducting blocks (5), an input hole (8) and an output hole (9) are respectively provided on both sides of the heat-conducting blocks (5), and the interior of the input hole (8) and the output hole (9) are The cabinet frame (1) is provided with an anti-backflow sheet (10) movably mounted therein, the input hole (8) and the output hole (9) are both connected to the breathing chamber (7), an exhaust hole (11) is provided on the outer surface of the base plate (4), the exhaust hole (11) is aligned with the output hole (9), a telescopic ball (12) is arranged inside the breathing chamber (7), the guide pipe (6) connects the inner cavities of a plurality of telescopic balls (12) in series, and an intermittent pumping mechanism is fixedly mounted inside the cabinet frame (1), and the intermittent pumping mechanism transports the flow medium to the guide pipe (6).

2. A photovoltaic grid-connected cabinet according to claim 1, characterized in that: A plurality of monitoring components are embedded in the interior of the heat conductive block (5), and the plurality of monitoring components are arranged in a ring array around the breathing cavity (7). The telescopic ball (12) is an elliptical capsule structure, and the two ends of the long axis of the telescopic ball (12) are respectively fixedly connected to the inner wall of the breathing cavity (7), and a plurality of magnetic sheets (31) are embedded in the outer wall of the telescopic ball (12).

3. A photovoltaic grid-connected cabinet according to claim 2, characterized in that: The monitoring component comprises an induction coil (32). During the expansion and contraction process of the telescopic ball (12), the magnetic sheet (31) moves back and forth, causing the induction coil (32) to cut the magnetic field lines of the magnetic sheet (31), and electrodes at both ends of the induction coil (32) generate changing electromotive forces.

4. A photovoltaic grid-connected cabinet according to claim 3, characterized in that: The monitoring component further comprises a memory metal belt (33), a sliding groove is provided inside the heat conductive block (5), one end of the memory metal belt (33) is fixedly connected to the sliding groove, a movable electrode (34) is fixedly mounted on the other end of the memory metal belt (33), a plurality of fixed electrodes (35) are fixedly mounted on the surface of the induction coil (32), the plurality of fixed electrodes (35) are arranged in a straight line to form a conductive slide rail, and when the movable electrode (34) slides along the sliding groove, the movable electrode (34) slides in contact with the conductive slide rail, so that the movable electrode (34) is electrically conductive to any fixed electrode (35).

5. A photovoltaic grid-connected cabinet according to claim 4, characterized in that: The intermittent pumping mechanism comprises a mounting base (14), a pumping cylinder (15) and an electric telescopic rod (16) are fixedly mounted on the upper side of the mounting base (14), a piston (17) is slidably mounted inside the pumping cylinder (15), a transmission connecting rod (18) is fixedly mounted on the upper side of the piston (17), the electric telescopic rod (16) drives the piston (17) to slide reciprocatingly up and down inside the pumping cylinder (15) through the transmission connecting rod (18), a multi-way joint seat (19) is fixedly mounted on the bottom end of the pumping cylinder (15), an output joint (20) and a first input joint (21) are fixedly mounted on the surface of the multi-way joint seat (19), the output joint (20) is connected to the top end of the guide pipe (6) through a first pipe (22), a liquid storage tank (13) is fixedly mounted inside the cabinet bracket (1), and the first input joint (21) is connected to the liquid storage tank (13) through a second pipe (23).

6. A photovoltaic grid-connected cabinet according to claim 5, characterized in that: A second input connector (24) is also fixedly mounted on the surface of the multi-way connector seat (19); the mouth of the second input connector (24) is connected to a gas supply main pipe (25); and one-way valves (26) are provided inside the output connector (20), the first input connector (21) and the second input connector (24).

7. A photovoltaic grid-connected cabinet according to claim 6, characterized in that: There are a plurality of pumping barrels (15), the first input connectors (21) at the lower sides of the plurality of pumping barrels (15) are all in communication with the second pipe (23), the second input connectors (24) at the lower sides of the plurality of pumping barrels (15) are all in communication with the gas supply main pipe (25), an assembly plate is fixedly mounted on the top ends of the transmission connecting rods (18) at the upper sides of the plurality of pumping barrels (15), and the telescopic ends of the electric telescopic rods (16) are fixedly connected to the assembly plate.

8. A photovoltaic grid-connected cabinet according to claim 7, characterized in that: An overflow pipe (27) is fixedly mounted on the upper end surface of the pumping cylinder (15), and the overflow pipe (27) is in communication with the space above the piston (17). An exhaust pipe (28) and a return pipe joint (29) are respectively fixedly mounted on the upper end surface of the liquid storage tank (13), and the return pipe joint (29) is in communication with the lower end of the guide pipe (6) via a third pipe (30).

9. A photovoltaic grid-connected cabinet according to any one of claims 1 to 8, characterized in that: A heat dissipation fan is installed in the upper end or / and the lower end of the cabinet support (1), and the heat dissipation fan delivers air to the installation room of the grid-connected cabinet.

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