A grid-connected inverter for controlling a photovoltaic power station

Abstract

The present invention relates to the technical field of inverters, and discloses a grid-connected inverter for controlling a photovoltaic power station, comprising a base, an inverter fixedly mounted on the upper surface of the base, a connecting rod fixedly mounted on the upper surface of the base, a cover body arranged above the base, the other end of the connecting rod fixedly connected to the bottom surface of the cover body, and a slide groove arranged inside the cover body. The present invention arranges an impeller and a cleaning member, utilizes the wind force passing through the impeller, and then causes the impeller to drive the cleaning member to move up and down around the surface of the inverter, so that the bristles brush off the dust attached to the surface of the inverter, thereby avoiding dust attachment and affecting the natural heat dissipation effect of the inverter. At the same time, the cleaning member moving up and down will collide with the contact plate and the cover body, thereby causing the cleaning member to vibrate, causing the dust on the bristles to fall off and leave the device through the through groove, thereby avoiding the reduction of the dust cleaning effect of the bristles and affecting the natural heat dissipation effect of the inverter.

Description

Technical Field

[0001] The present invention relates to the technical field of inverters, and in particular to a grid-connected inverter for controlling a photovoltaic power station. Background Art

[0002] A photovoltaic power station refers to a power generation system that utilizes solar energy and adopts electronic components such as crystalline silicon panels and grid-connected inverters. The function of the grid-connected inverter is to convert the direct current output of the solar cell into alternating current and synchronize the frequency and phase of the output alternating current with the mains.

[0003] When in use, existing grid-connected inverters are usually installed at a high height in an exposed state, so that a large amount of dust will adhere to the surface. When the grid-connected inverter is in operation, a high temperature will be generated inside it, so that the dust will block the natural heat dissipation of the grid-connected inverter, resulting in poor natural heat dissipation effect, thereby causing the electronic components inside the inverter to be affected by the high temperature and damaged. Summary of the invention

[0004] In view of the shortcomings of the existing grid-connected inverters mentioned in the background technology during use, the present invention provides a grid-connected inverter for controlling a photovoltaic power station, which has the advantages of cleaning dust on the surface of the inverter and avoiding affecting the heat dissipation effect of the inverter, thereby solving the technical problems raised in the above background technology.

[0005] The present invention provides the following technical solution: a grid-connected inverter for controlling a photovoltaic power station comprises a base, an inverter is fixedly mounted on the upper surface of the base, a connecting rod is fixedly mounted on the upper surface of the base, a cover body is arranged at an upper position of the base, the other end of the connecting rod is fixedly connected to the bottom surface of the cover body, a slide groove is provided inside the cover body, an impeller is movably mounted in the inner cavity of the slide groove, blades of the impeller extend out of the notch of the slide groove, the blades of the impeller generate friction with the inner wall of the slide groove, a support rod is fixedly mounted on the inner wall of the slide groove, the other end of the support rod is movably connected to the rotating shaft of the impeller, a force guide rod is movably mounted on the surface of the impeller, the other end of the force guide rod passes through the bottom surface of the slide groove, a cleaning member is movably mounted on the outer side of the inverter, the other end of the force guide rod is movably connected to the upper surface of the cleaning member, bristles are mounted on the inner side surface of the cleaning member, and the bristles contact the surface of the inverter.

[0006] Preferably, a through slot is provided inside the base, and a contact plate is fixedly installed inside the through slot.

[0007] Preferably, a heat dissipation film is fixedly mounted on the inner side surface of the cleaning member, and bristles are fixedly mounted on the surface of the heat dissipation film. When the heat dissipation film expands, the bristles on the surface thereof will be deflected.

[0008] Preferably, a lifting chamber is provided inside the cleaning member, a lifting plate is movably installed in the cavity of the lifting chamber, the cavity of the lifting chamber is filled with cooling liquid, a liquid hole is provided inside the cleaning member, and the cavity of the lifting chamber is connected with the inner cavity of the heat dissipation film through the liquid hole.

[0009] Preferably, an upper air film is fixedly mounted on the upper surface of the cleaning member, a lower air film is fixedly mounted on the lower surface of the cleaning member, piston rods are fixedly mounted on the upper and lower surfaces of the lifting plate, and the lifting plate is transmission-connected with the upper and lower air films via the piston rods.

[0010] Preferably, a clamping piece is movably installed inside the cleaning piece, a clamping groove is provided inside the piston rod, and the clamping piece and the clamping groove are clamped together.

[0011] Preferably, the clamping force between the clamp and the slot is twice the elastic force of the heat dissipation film. When the force guiding rod moves upward to the extreme position, the upper air film and the lower surface of the cover body are squeezed against each other. When the force guiding rod moves downward to the extreme position, the lower air film and the upper surface of the contact plate are squeezed against each other.

[0012] Preferably, the cleaning member is made of heat-conducting material, and generally the wind force passing through the impeller is 1.5 times the friction force between the impeller and the slide groove.

[0013] The present invention has the following beneficial effects:

[0014] 1. The present invention utilizes the wind force passing through the impeller through the arrangement of the impeller and drives the cleaning member to move up and down around the surface of the inverter, so that the bristles can brush off the dust attached to the surface of the inverter, thereby avoiding dust adhesion and affecting the natural heat dissipation effect of the inverter. At the same time, the cleaning member moving up and down will collide with the contact plate and the cover body, thereby causing the cleaning member to vibrate, causing the dust on the bristles to fall off and leave the device through the through groove, thereby avoiding a reduction in the cleaning effect of the bristles and affecting the natural heat dissipation effect of the inverter.

[0015] 2. The present invention arranges a lifting plate and a heat dissipation film. When the cleaning member collides with the contact plate, the lifting plate will move upward, causing the coolant in the lifting chamber to enter the heat dissipation film, causing the heat dissipation film to expand. The expanded heat dissipation film drives the bristles to deflect. Afterwards, as the cleaning member moves upward, the expanded heat dissipation film will contact the surface of the inverter, causing part of the heat in the inverter to enter the coolant in the heat dissipation film. Through the above process, the heat dissipation effect of the inverter is further improved. In addition, in the process of the coolant in the lifting chamber entering the heat dissipation film, it will impact the heat dissipation film, causing the heat dissipation film to drive the bristles to further vibrate, thereby preventing dust from being trapped on the bristles and affecting its cleaning effect on the inverter.

[0016] 3. The present invention arranges a lifting plate and a heat dissipation film. When the cleaning member collides with the cover body, the coolant in the heat dissipation film returns to the lifting cavity. The coolant entering the lifting cavity passes through the side wall of the cleaning member and then transfers its own heat to the external environment. Through the above process, the coolant in the heat dissipation film is prevented from contacting the inverter for a long time, causing the coolant to heat up, thereby reducing its cooling effect on the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structural contact plate of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the cleaning element of the present invention;

[0020] Figure 4 For the present invention Figure 3 A partial enlarged schematic diagram of the structure at center A;

[0021] Figure 5 This is a schematic diagram of the cleaning member of the present invention in a downward moving state;

[0022] Figure 6 For the present invention Figure 5 A partial enlarged schematic diagram of the structure at point B in the middle.

[0023] In the figure: 1. base; 2. through groove; 3. contact plate; 4. inverter; 5. connecting rod; 6. cover; 7. slide groove; 8. impeller; 9. support rod; 10. guide rod; 11. cleaning part; 12. heat dissipation film; 13. bristles; 14. lifting chamber; 15. lifting plate; 16. liquid hole; 17. upper air film; 18. lower air film; 19. clamp; 20. clamping slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1A grid-connected inverter for controlling a photovoltaic power station comprises a base 1, an inverter 4 is fixedly installed at the middle position on the upper surface of the base 1, a cable hole is provided inside the base 1 below the inverter 4 for connecting a cable, a connecting rod 5 is fixedly installed at the outer position on the upper surface of the base 1, a cover body 6 is provided above the base 1, the other end of the connecting rod 5 is fixedly connected to the bottom surface of the cover body 6, a slide groove 7 is provided in the middle position inside the cover body 6, an impeller 8 is slidably installed in the inner cavity of the slide groove 7, the blades of the impeller 8 extend out of the notch of the slide groove 7, the blades of the impeller 8 generate friction with the inner wall of the slide groove 7, a support rod 9 is fixedly installed on the inner wall of the slide groove 7, the other end of the support rod 9 is rotatably connected to the rotating shaft of the impeller 8, a guide rod 10 is eccentrically hinged on the surface of the impeller 8, and the other end of the guide rod 10 passes through the bottom of the slide groove 7. The outer side of the inverter 4 is movably sleeved with a cleaning piece 11, and the other end of the guide rod 10 is hinged to the upper surface of the cleaning piece 11. The inner side of the cleaning piece 11 is installed with bristles 13, and the bristles 13 are in contact with the surface of the inverter 4. When the wind passing through the impeller 8 blows the impeller 8, the impeller 8 drives the guide rod 10 to move, so that the cleaning piece 11 moves up and down around the surface of the inverter 4, and then the bristles 13 on its inner side brush off the dust attached to the surface of the inverter 4, thereby avoiding dust adhesion and affecting the natural heat dissipation effect of the inverter 4. At the same time, the cleaning piece 11 moving up and down will collide with the base 1 and the cover 6, and then the cleaning piece 11 will vibrate, causing the dust on the bristles 13 to fall off, thereby avoiding dust accumulation on the bristles 13, resulting in reduced cleaning effect and affecting the natural heat dissipation effect of the inverter 4.

[0026] See also Figure 2 A through groove 2 is longitudinally penetrated inside the base 1, and a contact plate 3 is fixedly installed inside the through groove 2. When the cleaning member 11 moves downward, the cleaning member 11 will extend into the through groove 2 and collide with the contact plate 3, causing the bristles 13 to vibrate, causing the dust retained thereon to fall off and leave the device from the through groove 2, thereby preventing the fallen dust from remaining inside the device and affecting the heat dissipation of the inverter 4.

[0027] See also Figure 3 A heat dissipation film 12 is fixedly mounted on the inner side of the cleaning member 11 , and bristles 13 are fixedly mounted on the surface of the heat dissipation film 12 . When the heat dissipation film 12 expands subsequently, the bristles 13 on its surface will deflect and will not contact the surface of the inverter 4 .

[0028] See also Figure 4A lifting chamber 14 is provided inside the cleaning member 11, a lifting plate 15 is slidably installed in the cavity of the lifting chamber 14, a cavity in the lifting chamber 14 located above the lifting plate 15 is filled with cooling liquid, a liquid hole 16 is provided inside the cleaning member 11 between the lifting chamber 14 and the heat dissipation film 12, one side of the liquid hole 16 is connected to the cavity in the lifting chamber 14 located above the lifting plate 15, and the other side of the liquid hole 16 is connected to the inner cavity of the heat dissipation film 12, when the lifting plate 15 moves upward relative to the lifting chamber 14, the cooling liquid in the lifting chamber 14 is squeezed, so that the cooling liquid The liquid enters the heat dissipation film 12 through the liquid hole 16, causing the heat dissipation film 12 to expand. In the subsequent process, the expanded heat dissipation film 12 will contact the surface of the inverter 4, so that part of the heat in the inverter 4 enters the cooling liquid in the heat dissipation film 12. Through the above process, the heat dissipation effect of the inverter 4 is further improved. In addition, in the process of the cooling liquid in the lifting chamber 14 entering the heat dissipation film 12, it will impact the heat dissipation film 12, causing the heat dissipation film 12 to drive the bristles 13 to further vibrate, thereby preventing dust from being trapped on the bristles 13 and affecting its cleaning effect on the inverter 4.

[0029] See also Figure 5 An upper air film 17 is fixedly installed on the upper surface of the cleaning member 11, and a lower air film 18 is fixedly installed on the lower surface of the cleaning member 11. Piston rods are fixedly installed on the upper and lower surfaces of the lifting plate 15. The upper end of the piston rod at the upper side position passes through the upper side surface of the lifting chamber 14 and is fixedly connected to the upper air film 17. The lower end of the piston rod at the lower side position passes through the lower side surface of the lifting chamber 14 and is fixedly connected to the lower air film 18. Through the arrangement of the upper air film 17, the lower air film 18 and the piston rod, during the collision between the cleaning member 11 and the cover body 6 and the contact plate 3, the upper and lower air films will drive the lifting plate 15 to move through the piston rod, thereby enabling the above-mentioned functions to be smoothly realized.

[0030] See also Figure 6 , the cleaning member 11 is internally provided with clips 19 slidably mounted at the upper and lower sides of the lifting chamber 14, and the piston rods at the upper and lower positions are provided with clip grooves 20, and the clips 19 at the upper and lower positions correspond to and engage with the clip grooves 20 at the upper and lower positions. By setting the clips 19 and the clip grooves 20, in the process of the upper and lower air films driving the piston rod to move, the piston rod drives the clip grooves 20 to engage with the corresponding clips 19, thereby limiting the piston rod to prevent the heat dissipation film 12 from shrinking and affecting the realization of the above-mentioned heat dissipation function.

[0031] The clamping force between the clamp 19 and the clamping slot 20 is twice the elastic force of the heat dissipation film 12. When the force guiding rod 10 moves up to the extreme position, the upper air film 17 and the lower surface of the cover body 6 are squeezed against each other. When the force guiding rod 10 moves down to the extreme position, the lower air film 18 and the upper surface of the contact plate 3 are squeezed against each other.

[0032] The cleaning member 11 is made of a heat-conducting material (such as copper). Generally, the wind force passing through the impeller 8 is 1.5 times the friction between the impeller 8 and the slide groove 7. Through the material setting of the cleaning member 11, when the cleaning member 11 collides with the cover body 6, the coolant in the heat dissipation film 12 returns to the lifting chamber 14. The coolant entering the lifting chamber 14 passes through the side wall of the cleaning member 11, and then transfers its own heat to the external environment. Through the above process, the coolant in the heat dissipation film 12 is prevented from contacting the inverter 4 for a long time, causing the coolant to heat up, thereby reducing its cooling effect on the inverter 4. In addition, the general wind force is slightly greater than the friction between the impeller 8 and the slide groove 7, thereby preventing the impeller 8 from rotating too fast, resulting in the above function cannot be effectively realized.

[0033] The method of use (working principle) of the present invention is as follows:

[0034] During operation, when the wind contacts the impeller 8, it will drive the impeller 8 to rotate, causing the guide rod 10 to move accordingly. The moving guide rod 10 drives the cleaning member 11 to move up and down around the inverter 4. When the cleaning member 11 moves downward, it will drive the bristles 13 to contact the surface of the inverter 4, so that the dust adhered to the surface of the inverter 4 is brushed off. Afterwards, when the cleaning member 11 moves down to the extreme position, the lower air film 18 contacts and hits the contact plate 3 at the lower position, so that the dust attached to the bristles 13 falls off. At the same time, the lower air film 18 drives the lifting plate 15 to move upward relative to the lifting chamber 14 through the piston rod at the lower position, so that the coolant in the lifting chamber 14 enters the heat dissipation film 12 through the liquid hole 16, causing the heat dissipation film 12 to expand and drive the bristles 13 to deflect. In addition, the upward lifting plate 15 drives the upper air film 17 to stretch through the piston rod at the upper position, and then moves to the lower side. When the slot 20 on the piston rod at the upper position is engaged with the card member 19 at the lower position, the lifting plate 15 stops moving. Thereafter, when the cleaning member 11 moves upward, it will drive the expanded heat dissipation film 12 to contact the surface of the inverter 4, so that part of the heat inside the inverter 4 enters the coolant in the heat dissipation film 12. Then, when the cleaning member 11 moves up to the extreme position, the upper air film 17 contacts and hits the cover body 6 with the piston rod at the upper position, so that the lifting plate 15 moves downward relative to the lifting chamber 14, so that the coolant in the heat dissipation film 12 returns to the lifting chamber 14 through the liquid hole 16, causing the heat dissipation film 12 to shrink and drive the bristles 13 to reset. In addition, the downwardly moved lifting plate 15 passes through the piston rod at the lower side, thereby driving the lower air film 18 to stretch. When the slot 20 on the piston rod at the upper side is engaged with the card member 19 at the upper side, the lifting plate 15 stops moving. This is one working cycle.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grid-connected inverter for controlling a photovoltaic power station, comprising a base (1), characterized in that: An inverter (4) is fixedly mounted on the upper surface of the base (1), a connecting rod (5) is fixedly mounted on the upper surface of the base (1), a cover body (6) is arranged above the base (1), the other end of the connecting rod (5) is fixedly connected to the bottom surface of the cover body (6), a slide groove (7) is provided inside the cover body (6), an impeller (8) is movably mounted in the inner cavity of the slide groove (7), the blades of the impeller (8) extend out of the notch of the slide groove (7), the blades of the impeller (8) generate friction with the inner wall of the slide groove (7), and the inner wall of the slide groove (7) is provided with a plurality of impellers (8). A support rod (9) is fixedly mounted on the wall, the other end of the support rod (9) is movably connected to the rotating shaft of the impeller (8), a force guide rod (10) is movably mounted on the surface of the impeller (8), the other end of the force guide rod (10) passes through the bottom surface of the slide groove (7), a cleaning member (11) is movably mounted on the outer side of the inverter (4), the other end of the force guide rod (10) is movably connected to the upper surface of the cleaning member (11), bristles (13) are mounted on the inner side surface of the cleaning member (11), and the bristles (13) are in contact with the surface of the inverter (4); A heat dissipation film (12) is fixedly mounted on the inner side surface of the cleaning member (11), and bristles (13) are fixedly mounted on the surface of the heat dissipation film (12); when the heat dissipation film (12) expands, the bristles (13) on the surface thereof are deflected; The cleaning member (11) has a lifting chamber (14) formed inside, a lifting plate (15) is movably installed in the body of the lifting chamber (14), the body of the lifting chamber (14) is filled with cooling liquid, a liquid hole (16) is formed inside the cleaning member (11), and the body of the lifting chamber (14) is connected to the inner cavity of the heat dissipation film (12) through the liquid hole (16).

2. A grid-connected inverter for controlling a photovoltaic power station according to claim 1, characterized in that: A through slot (2) is provided inside the base (1), and a contact plate (3) is fixedly installed inside the through slot (2).

3. A grid-connected inverter for controlling a photovoltaic power station according to claim 1, characterized in that: An upper air membrane (17) is fixedly mounted on the upper surface of the cleaning member (11), a lower air membrane (18) is fixedly mounted on the lower surface of the cleaning member (11), piston rods are fixedly mounted on the upper and lower surfaces of the lifting plate (15), and the lifting plate (15) is transmission-connected to the upper air membrane (17) and the lower air membrane (18) via the piston rod.

4. A grid-connected inverter for controlling a photovoltaic power station according to claim 3, characterized in that: A clamping piece (19) is movably installed inside the cleaning piece (11), a clamping groove (20) is provided inside the piston rod, and the clamping piece (19) and the clamping groove (20) are clamped together.

5. A grid-connected inverter for controlling a photovoltaic power station according to claim 4, characterized in that: The clamping force between the clamping member (19) and the clamping slot (20) is twice the elastic force of the heat dissipation film (12); when the force guiding rod (10) moves upward to the extreme position, the upper air film (17) and the lower surface of the cover body (6) are pressed against each other; when the force guiding rod (10) moves downward to the extreme position, the lower air film (18) and the upper surface of the contact plate (3) are pressed against each other.

6. A grid-connected inverter for controlling a photovoltaic power station according to claim 1, characterized in that: The cleaning member (11) is made of heat-conducting material, and the wind force passing through the impeller (8) is 1.5 times the friction force between the impeller (8) and the slide groove (7).

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