CN203645554U - Solar photovoltaic power generation system and inverter thereof - Google Patents

Abstract

The utility model discloses a solar photovoltaic power generation system and an inverter thereof. The inverter includes at least two cabinets, each cabinet includes a box body and a box cover, and the opposite outer walls of two adjacent boxes are bonded together. , and/or at least one set of first fastening mechanism and/or at least one set of second fastening mechanism, the first fastening mechanism includes a first fastener and two first connectors, and the two first connections The parts are respectively fixed on the outer surfaces of the two boxes, and are detachably connected by the first fastener; the second fastening mechanism includes a second fastener and a second connecting piece, and the two The outer surface of one of the boxes has a groove, the second connecting piece is fixedly connected in the groove, and is detachably connected with the other box through the second fastener. Compared with the prior art, this solution connects the two boxes through the fastening mechanism of the above structure, avoiding the contact between the disassembly tools and the electronic functional components, the disassembly efficiency is significantly improved, and the disassembly difficulty is significantly reduced.

Description

A solar photovoltaic power generation system and its inverter

technical field

The utility model relates to the technical field of inverters, in particular to a solar photovoltaic power generation system and an inverter thereof. the

Background technique

An inverter is a power adjustment device composed of semiconductor devices, mainly used to convert direct current into alternating current. The chassis of the inverter includes the main box and the combiner box. The main box and the combiner box are respectively equipped with matching male and female terminals. During the installation process, the corresponding electrical functions in the two boxes are realized by plugging the male and female terminals. The electrical connection of the components, and then the main box and the combiner box are fixedly connected by the bolt assembly. the

The inverter with the above structure has the following two deficiencies in the actual assembly and maintenance process:

1. The threaded mounting holes matched with the bolt assembly are respectively opened on the opposite side walls of the main box and the combiner box. The disassembly and assembly of the bolt assembly must be carried out in the box. The space for disassembling and assembling the bolt assembly is narrow and inconvenient to operate, and there are problems of difficulty in disassembling and assembling and low efficiency. the

2. In addition, the main box and the combiner box realize the electrical connection relationship through the matching male and female terminals. The process of alignment is time-consuming, which further increases assembly difficulty and reduces assembly efficiency. In addition, the male and female terminals are expensive, which makes the overall production cost of the inverter high. the

In view of this, those skilled in the art urgently need to provide an inverter to solve the problems of difficulty in disassembling and assembling the two chassis in the existing inverter, low efficiency and high manufacturing cost. the

Utility model content

In view of the above-mentioned defects, the core purpose of the present utility model is to provide an inverter to solve the problems of difficult disassembly and assembly of the chassis in the existing inverter, low efficiency and high manufacturing cost. On this basis, the utility model also provides a solar photovoltaic power generation system comprising the above-mentioned inverter. the

An inverter provided by the utility model includes at least two cabinets, each of which includes a detachably connected box body and a box cover, and the opposite outer walls of two adjacent boxes are fitted together, It also includes at least one set of fastening mechanisms and/or at least one set of second fastening mechanisms, the first fastening mechanism includes a first fastener and two first connectors, and the two first connectors are respectively It is fixedly connected to the outer surfaces of the two boxes and detachably connected by the first fastener. the

The second fastening mechanism includes a second fastener and a second connecting piece, the outer surface of one of the two boxes has a groove, and the second connecting piece is fixedly connected in the groove, And it is detachably connected with the other box body through the second fastener. the

Preferably, the shape of each of the first connecting pieces is "L", the first connecting piece is fixedly connected to the corresponding box body through one side arm, and the other side arm has a Mounting holes for matching fasteners. the

Preferably, the first connecting piece further includes at least one reinforcing rib, and the reinforcing rib is respectively fixedly connected to the two side walls of the first connecting piece. the

Preferably, the box body has an open end, the box cover covers the open end and is detachably connected with the box body, the first connecting piece is connected to the open end, and the box cover There is a space for accommodating the first connecting piece, and the groove is provided on the outer side wall of the corresponding box body. the

Preferably, the electronic functional components respectively installed in the two boxes are electrically connected through cables, and the opposite side walls have openings through which the cables pass. the

Preferably, one of the two cabinets is placed above the other, the lower box has an outer peripheral wall, the upper box has an inner peripheral wall, and the inner peripheral wall is sleeved on the outer peripheral wall; the outer peripheral wall is composed of The edges of the corresponding openings are formed by extending to the outside of the lower box, and the inner peripheral walls are formed by extending the edges of the corresponding openings to the inside of the upper box. the

Preferably, the outer peripheral surface of the outer peripheral wall is a guiding slope to guide the inner peripheral wall to fit on the outer peripheral wall. the

Preferably, a sealing part is also included, the sealing part is located between the two boxes, and the sealing part has a through hole for the cable to pass through. the

Preferably, one of the two boxes is placed above the other, and the groove is provided on the lower box. the

The inverter provided by the utility model includes at least two cabinets, each cabinet includes a detachably connected box body and a box cover, the opposite outer walls of two adjacent boxes are attached, and at least one set of A fastening mechanism and/or at least one set of second fastening mechanisms, the first fastening mechanism includes a first fastening member and two first connecting pieces, and the two first connecting pieces are respectively fixedly connected to the two boxes The outer surface of the box body is detachably connected by the first fastener; the second fastening mechanism includes a second fastener and a second connecting piece, and the outer surface of one of the two boxes has a groove, the second connecting piece is fixedly connected in the groove, and is detachably connected to the other box body through the second fastening piece. the

Compared with the prior art, in this solution, the first fastening mechanism and the second fastening mechanism connecting the two boxes are located outside the box, and the interference with the electronic functional components inside the box is avoided during the disassembly and assembly of the box. , so the efficiency of disassembly and assembly is significantly improved, and the difficulty of disassembly and assembly is significantly reduced. In addition, the second fastening mechanism is hidden in the groove of the box body, which avoids the abrupt feeling of the fastening mechanism protruding from the outer surface of the box, thereby improving the appearance of the inverter. the

In a preferred solution of the present utility model, the above-mentioned case includes a case body and a case cover, the case body has an open end, the case cover covers the open end and is detachably connected with the case, the first connecting piece is connected to the open end, The box cover has a space for accommodating the first connecting piece. During the assembly process, the two boxes are first connected by the fastening mechanism, and then the box cover is connected to the box. the

Obviously, this solution creates a space for accommodating the first connector on the case cover, so that the fastening mechanism is hidden in the case cover, avoiding the abrupt feeling that the fastening mechanism protrudes from the outer surface of the case, thereby improving the efficiency of the inverter. The aesthetics of the appearance of the device. the

In yet another preferred solution of the present utility model, the electronic functional components respectively installed in the two boxes are electrically connected through cables, and the opposite side walls of the two boxes have openings for the cables to pass through. the

This solution connects the two boxes through the fastening mechanism of the above structure, and opens an opening structure on the two boxes, so that the cables electrically connected to the inverter circuit module and the heating function element pass through the opening, eliminating the need for existing The male and female terminals in the technology not only reduce the manufacturing cost of the inverter, but also avoid the alignment problem during the assembly process, and further improve the disassembly efficiency. the

The utility model also provides a solar photovoltaic power generation system, including a solar photovoltaic module, a junction box and an inverter, wherein the junction box is installed on the back plate of the solar photovoltaic module, and the electrical signal input end of the inverter and the junction box The electrical signal output end is connected, and the inverter is specifically an inverter with the above-mentioned structure. the

Since the above-mentioned inverter has the above-mentioned technical effects, the solar photovoltaic power generation system including the inverter should also have the same technical effects, which will not be repeated here. the

Description of drawings

Fig. 1 shows the structural representation of the inverter provided by the utility model;

Fig. 2 shows the partially enlarged schematic diagram of A place of Fig. 1;

Fig. 3 shows the structural representation of the inverter (without case cover) shown in Fig. 1;

Fig. 4 shows the schematic structural diagram of the chassis (excluding the case cover) of the inverter shown in Fig. 1;

Fig. 5 shows the partially enlarged schematic diagram of place B in Fig. 4;

Fig. 6 shows the schematic diagram of the exploded structure of the chassis described in Fig. 4;

Fig. 7 shows the schematic diagram of the three-dimensional structure of the upper box shown in Fig. 4;

Fig. 8 shows the schematic diagram of the three-dimensional structure of the lower box shown in Fig. 4;

Fig. 9 shows the schematic diagram of the two-dimensional main view structure of the lower box shown in Fig. 8;

Fig. 10 shows a right view structural diagram of the lower box body shown in Fig. 9 . the

Correspondence between the reference signs and the names of the various parts in Figures 1 to 6:

11 upper box body, 111 upper opening, 112 inner peripheral wall, 12 upper box cover, 13 lower box body, 131 lower opening, 132 outer peripheral wall, 133 groove, 14 lower box cover, 2 first connector, 21 installation hole, 22 Reinforcing Rib, 3 First Bolt Assembly, 4 Second Connector, 5 Second Bolt Assembly, 6 Inverter Circuit Module, 7 Heating Functional Element, 8 Cable, 9 Sealing Part, 91 Through Hole. the

Detailed ways

The core of the utility model is to provide an inverter, which can detachably connect the two chassis through the fastening mechanism arranged outside the chassis, avoiding the problem of contact with the electronic components in the chassis during the disassembly process, thereby improving the inverter. Disassembly and assembly efficiency, reducing the difficulty of disassembly and assembly. On this basis, the utility model also provides a solar photovoltaic power generation system comprising the above-mentioned inverter. the

The specific structural schematic diagram of the inverter provided by the utility model will now be described in conjunction with the accompanying drawings. It should be noted that the orientation words "upper" and "lower" involved in this article are set based on the drawings in the specification, so the appearance of the above orientation words does not limit the scope of protection of the present utility model. the

Please refer to Fig. 1 to Fig. 5, among them, Fig. 1 shows the structural diagram of the inverter provided by the utility model, Fig. 2 shows the partially enlarged schematic diagram of A in Fig. 1, Fig. 3 shows The schematic diagram of the structure of the inverter shown in Fig. 4 (without the case cover), Fig. 4 shows the schematic diagram of the structure of the inverter case (without the case cover) shown in Fig. Partial enlarged schematic diagram. the

As shown in Figure 4, the inverter provided in this solution includes two chassis, and one of the two chassis is placed above the other. distinguish. Both the upper case and the lower case include a detachably connected case body and a case cover, and the opposite outer walls of the upper case body 11 and the lower case body 13 are fitted together, and also include two sets of first fastening mechanisms and two sets of second fastening mechanisms. mechanism. the

Wherein, the first fastening mechanism includes two first connecting parts 2 and a first bolt assembly 3, and the two first connecting parts 2 are respectively located on the outer surfaces of the upper box body 11 and the lower box body 13, and pass through the first bolt assembly 3 Detachable connection; the shape of the first connecting piece 2 is "L" shape, one side arm is welded and connected to the corresponding box body, and the other side arm extension has a mounting hole 21 suitable for the first bolt assembly 3 . the

The second fastening mechanism includes a second fastener 5 and a second connecting piece 4. The outer surface of the lower box body 13 has a groove 133 provided in the vertical direction, and the upper opening end of the groove 133 is fixedly connected with a horizontally arranged The second connecting plate 4 , the second connecting plate 4 and the upper box body 11 are connected through the second bolt assembly 5 . In order to facilitate understanding of the specific structure of the chassis, please refer to FIG. 5 and FIG. 6 together, wherein FIG. 6 shows a schematic diagram of an exploded structure of the chassis in FIG. 4 . the

Compared with the prior art, in this solution, the first fastening mechanism and the second fastening mechanism connecting the two boxes are located outside the box, avoiding contact with the electronic functional components inside the box during disassembly and assembly of the box Therefore, the efficiency of disassembly and assembly has been significantly improved, and the difficulty of disassembly and assembly has been significantly reduced. In addition, the second connecting member and the second bolt assembly 5 of the second fastening mechanism are both hidden in the groove 133, thereby improving the appearance of the chassis while enhancing the reliability of the connection between the chassis. the

It should be noted that one of the two chassis in this solution is placed above the other. This arrangement can reduce the requirements for installation site space. It can be understood that on the basis of satisfying the detachable connection relationship between the two , the two chassis can also be arranged side by side. In addition, the shape of the first connector 2 in this solution is specifically "L", which has the advantages of simple structure and low manufacturing cost. Of course, the first connector 2 can also be other structural forms. In addition, the fastener in this solution is specifically the first bolt assembly 3. On the basis of meeting the requirements of the function, processing and assembly process of the first connecting piece 2, the fastener can also be a detachable pin shaft or other Structures commonly used by those skilled in the art. the

As shown in Figure 5, the above-mentioned first connector 2 also includes two reinforcing ribs 21, and the two reinforcing ribs 21 are respectively placed at both ends of the first connector 2 and fixed to the two inner side walls of the first connector 2 respectively. connect. Apparently, the arrangement of the ribs 21 can enhance the deformation resistance of the first connecting member 2, thereby ensuring the reliability of the connection of the chassis. It can be understood that, on the basis of satisfying the functional, processing and assembly process requirements of enhancing the deformation resistance of the first connector 2 , the number of the above-mentioned reinforcing ribs 21 can be specifically 1, 3 or other values. the

As mentioned above, the upper case includes an upper case body 11 and an upper case cover 12. The upper case body 11 has an open end, and the upper case cover 12 covers the open end and is detachably connected to the upper case body 11 by a bolt assembly. superior. Wherein, the first connecting piece 2 is fixedly connected to the open end, and the upper case cover 12 has a space for accommodating the first connecting piece 2 . The lower case also includes a lower case body 13 and a lower case cover 14, which will not be repeated here. In this solution, the two first connectors 2 are respectively fixedly connected to the opening ends of the upper box body 11 and the lower box body 13 and the first connectors 2 are hidden in the box cover, which avoids fastening The abruptness of the mechanism protruding from the outer surface of the chassis not only makes the overall appearance and structure of the inverter beautiful, but also avoids the problem of touching due to the protruding fastening mechanism during installation. the

As shown in Figure 3, the electronic functional elements installed in the upper box body 11 and the lower box body 13 are electrically connected through cables 8, specifically, in this solution, on the opposite side walls of the upper box body 11 and the lower box body 13 An upper opening 111 and a lower opening 131 for the cables 8 to pass through are opened respectively. the

This scheme connects the two boxes through the fastening mechanism of the above structure, and provides an opening structure on the two boxes, so that the cables 8 connected to the electronic functional components pass through the upper and lower openings, which saves the prior art The male and female terminals in the inverter not only reduce the manufacturing cost of the inverter, but also avoid alignment problems during the assembly process and further improve the efficiency of disassembly and assembly. In order to facilitate the understanding of the specific structure of the upper box and the lower box, please refer to Figure 7 and Figure 8 together, wherein, Figure 7 shows a schematic diagram of the three-dimensional structure of the upper box shown in Figure 4, and Figure 8 shows the diagram The schematic diagram of the three-dimensional structure of the lower box shown in 4. the

In order to improve the IP protection level of the chassis, the lower box 13 of the two boxes in this scheme has an outer peripheral wall 132, and the upper box 11 has an inner peripheral wall 112, and the inner peripheral wall 112 is set on the outer peripheral wall 132; the outer peripheral wall 132 is opened by the lower The edge of 131 is formed by extending to the outside of the lower box body 13 , and the inner peripheral wall 112 is formed by extending the edge of the upper opening 111 to the inside of the box body 11 . Obviously, the surrounding wall structure of the above structure can play a role of water blocking. When the inverter is installed outdoors, it can prevent rainwater from flowing into the inside of the chassis and damage the electronic components contained therein, thereby improving the reliability of the inverter. sex and safety. the

In addition, as shown in FIG. 9 , which shows a schematic diagram of the two-dimensional front structure of the lower box shown in FIG. 8 , the outer peripheral surface of the outer peripheral wall 132 is a guiding slope, and the guiding inner peripheral wall is sleeved on the outer peripheral wall. superior. During the installation process, the inner peripheral wall 112 of the upper box body 11 is easily fitted on the outer peripheral wall 132 of the lower box body 13 , so that the assembly process of the upper and lower box bodies 13 can be completed quickly and efficiently. In order to facilitate understanding of the specific structure of the peripheral wall 132 , please also refer to FIG. 10 , which shows a right view structural diagram of the lower box shown in FIG. 9 . Of course, on the basis of meeting the requirements of waterproof function, processing and assembly technology, the outer surface of the peripheral wall 132 can also be arranged perpendicular to the outer wall of the chassis. the

In order to improve the IP protection level of the above-mentioned case, this solution also includes a sealing part 9, which is arranged between the two boxes and has a through hole 91 for the cable 8 to pass through. the

In addition to the above-mentioned inverter, the utility model also provides a solar photovoltaic power generation system, which includes a solar photovoltaic module, a junction box and an inverter, wherein the junction box is installed on the back plate of the solar photovoltaic module, and the inverter The electrical signal input end of the junction box is connected to the electrical signal output end of the junction box, and the inverter is specifically an inverter with the above-mentioned structure. It can be understood that the internal functional elements constituting the solar photovoltaic power generation system are exactly the same as those of the prior art, and those skilled in the art can realize them based on the prior art, so details will not be repeated here. the

The above descriptions are only preferred embodiments of the present utility model, and do not constitute a limitation to the protection scope of the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in the protection scope of the claims of the present utility model. the

Claims (10)

1. An inverter, comprising at least two casings, each of which includes a detachably connected casing and a casing cover, and the relative outer side walls of two adjacent casings are bonded together, characterized in that, Also comprising at least one set of first fastening mechanisms and/or at least one set of second fastening mechanisms; The first fastening mechanism includes a first fastener (3) and two first connectors (2), and the two first connectors (2) are fixedly connected to the outer surfaces of the two boxes respectively. surface, and is detachably connected by said first fastener (3); The second fastening mechanism includes a second fastener (5) and a second connecting piece (4), the outer surface of one of the two boxes has a groove (133), and the second connecting piece (4) fixedly connected in the groove (133), and detachably connected with the other box body through the second fastener (5). 2. The inverter according to claim 1, characterized in that, the shape of each first connecting piece (2) is "L", and the first connecting piece (2) passes through a side arm It is fixedly connected to the corresponding box body, and the other side arm has a mounting hole (21) adapted to the first fastener (3). 3. The inverter according to claim 2, characterized in that, the first connecting member (2) further comprises at least one reinforcing rib (22), and the reinforcing ribs (22) are respectively connected to the first The two side walls of part (2) are fixedly connected. 4. The inverter according to any one of claims 1 to 3, wherein the box body has an open end, and the box cover fits on the open end and can be connected with the box body The connection is disassembled, the first connector (2) is connected to the open end, the cover has a space for accommodating the first connector (2), and the groove (133) is located in the corresponding the outer wall of the box. 5. The inverter according to any one of claims 1 to 3, characterized in that the electronic functional components respectively installed in the two boxes are electrically connected by cables (8), opposite to the side walls Each has an opening for the cable (8) to pass through. 6. The inverter according to claim 5, characterized in that, one of the two casings is placed above the other, the lower casing (13) has a peripheral wall (132), and the upper casing ( 11) It has an inner peripheral wall (112), and the inner peripheral wall (112) is sleeved on the outer peripheral wall (132); the outer peripheral wall (132) extends from the edge of the corresponding opening (131) to the lower box (13) formed by extending from the outside, and the inner peripheral wall (112) is formed by extending from the edge of the corresponding opening (111) to the inside of the upper box (11). 7. The inverter according to claim 6, characterized in that, the outer peripheral surface of the outer peripheral wall (132) is a guiding slope to guide the inner peripheral wall (112) to be fitted on the outer peripheral wall (132) . 8. The inverter according to claim 6, characterized in that it further comprises a sealing member (9), the sealing member (9) is located between the two boxes, and the sealing member (9) has A through hole (91) for the cable (8) to pass through. 9. The inverter according to claim 4 or 5, characterized in that one of the two boxes is placed above the other, and the groove (133) is provided on the lower box. 10. A solar photovoltaic power generation system, comprising a solar photovoltaic module, a junction box and an inverter, the junction box is fixedly connected to the back plate of the solar photovoltaic module, the electrical signal input terminal of the inverter and the The electrical signal output end of the junction box is connected, and the characteristic is that the inverter is specifically the inverter according to any one of claims 1-9.

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