A voltage reduction isolation device for domestic photovoltaics

Abstract

The application discloses a voltage reduction isolation device for household photovoltaic, relates to the field of electric control devices of photovoltaic equipment, and comprises a protective shell, a control module and a mounting back plate, the control module is fixedly arranged on the mounting back plate, the mounting back plate and the shell are detachably connected, a matching body is movably connected to the mounting back plate, a docking structure is arranged on the protective shell, the docking structure is used for matching the matching body, when the matching body and the docking structure are matched, the matching body and the mounting back plate are relatively fixed, a fixing assembly is arranged between the protective shell and the matching body, and the fixing assembly is used for relatively fixing the matching body and the protective shell, and the application optimizes the connection mode of the mounting back plate and the protective shell through a simple structure, and improves the convenience of dismounting operation of the mounting back plate relative to the protective shell.

Description

Technical Field

[0001] This application relates to the technical field of electrical control devices for photovoltaic equipment, and more specifically, to a step-down isolation device for residential photovoltaic systems. Background Technology

[0002] Photovoltaic equipment often includes devices that can adjust the voltage, called step-down isolation modules. These modules can convert high-voltage electricity to low-voltage electricity. After the circuit is connected, the internal couplers and transformers start operating, effectively outputting current and maintaining the normal operation of the equipment.

[0003] To facilitate installation and save space, these step-down isolation modules are often integrated into a mounting backplate. The mounting backplate is fixed inside a protective housing, isolating the voltage and current at the output and input, preventing mutual interference or influence. However, these devices are typically secured to the mounting backplate and housing using bolt and screw hole connections. Removing the step-down isolation module for repair or maintenance is time-consuming, making it difficult to quickly remove or assemble the mounting backplate, thus causing considerable inconvenience for maintenance and testing.

[0004] In summary, how to quickly assemble and disassemble the backplate and housing is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a step-down isolation device for residential photovoltaic systems, which effectively improves the ease of installation and removal of the backsheet and enhances the maintenance efficiency of the step-down isolation module.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A step-down isolation device for residential photovoltaic systems includes a protective housing, a control module, and a mounting backplate. The control module is fixedly mounted on the mounting backplate, and the mounting backplate and the housing are detachably connected. A mating body is movably connected to the mounting backplate. A docking structure is provided on the protective housing for the mating body to mate with. When the mating body and the docking structure mate, the mating body and the mounting backplate are relatively fixed. A fixing component is provided between the protective housing and the mating body to fix the mating body and the protective housing relatively.

[0008] Preferably, the mating body is a retaining plate, which is located at the edge of the mounting back plate. The retaining plate is provided with a protruding structure, and the mating structure is a limiting groove, which is for the protruding structure of the retaining plate to be inserted.

[0009] Preferably, the card plate and the mounting back plate are hinged, the hinge axis of the card plate is perpendicular to the groove depth direction of the limiting groove, and the hinge axis of the card plate relative to the mounting back plate is a coil spring axis. In its natural state, the card plate has a flipping tendency to insert the protruding structure into the limiting groove.

[0010] Preferably, the fixing component includes a slide tube and a plug tube. The slide tube and the clamping plate are slidably connected, and the plug tube and the protective housing are fixedly connected. The axis of the plug tube is perpendicular to the depth direction of the limiting groove. After the protruding structure of the clamping plate enters the limiting groove, the plug tube is inserted into the slide tube.

[0011] Preferably, the fixing assembly further includes a spring and a guide rod, the slide tube and the spring are both sleeved on the guide rod, the guide rod and the clamping plate are fixedly connected, one end of the spring is connected to the clamping plate and the other end is connected to the slide tube, and the spring applies a thrust toward the insert to the slide tube.

[0012] Preferably, a sleeve is connected to the mounting back plate, and an insertion rod is connected to the protective housing, with the sleeve for the insertion rod to be coaxially inserted.

[0013] Preferably, the protective housing includes multiple sub-housings, each sub-housing is connected to a mounting backplate, each sub-housing is connected to multiple pins and has multiple slots, a pin on one sub-housing is inserted into a slot on an adjacent sub-housing, and the protective housing is provided with a limiting member for preventing the pin from retracting into the slot.

[0014] Preferably, the plurality of slots on the sub-housing are oriented in a specific direction, the pins are provided with connecting grooves, the limiting member is a screw, the length direction of the screw is parallel to the arrangement direction of the plurality of pins, the screw passes through the connecting grooves of all the pins, one of the connecting grooves is a threaded groove, and the screw is threadedly connected to the pin through the threaded groove.

[0015] Preferably, the protective housing is provided with an assembly base, the assembly base includes a fixing rod and a panel bracket, the fixing rod is connected to the edge of the panel bracket and is connected to the protective housing, and the panel bracket is provided with a wire groove for the wire harness of the control module to pass through.

[0016] Preferably, a cover plate is hinged to the panel support, the cover plate is used to cover the wire groove, and the cover plate is provided with a protrusion. When the cover plate covers the wire groove, the protrusion of the cover plate enters into the wire groove.

[0017] The voltage reduction isolation device for residential photovoltaic systems provided in this application involves placing the mounting backplate in the corresponding position on the protective housing, then aligning the mating body with the docking structure to achieve initial positioning and mating between the mounting backplate and the protective housing. The mating body is then fixed to the docking structure of the protective housing by a fixing component. At this point, the mounting backplate is fixed to the protective housing through the mating body. When disassembling, the fixing component can be released from its fixing state on the mating body. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram illustrating the overall structure of a step-down isolation device used in residential photovoltaic systems;

[0020] Figure 2 A top-view sectional view illustrating the internal structure of the protective shell;

[0021] Figure 3 To reflect Figure 2 Enlarged view of part B in the middle;

[0022] Figure 4 To reflect Figure 1 Enlarged view of part A in the middle;

[0023] Figure 5 This is a schematic diagram illustrating the overall structure of the mounting base.

[0024] Figures 1-5 In the accompanying drawings, the reference numerals include:

[0025] 1. Protective housing; 101. Fixing component; 2. Mounting base; 3. Cable tray; 4. Fixing rod; 5. Left housing; 6. Slot; 7. Pin; 8. Right housing; 9. LCD screen; 10. Insert rod; 11. Sleeve sleeve; 12. Operating slot; 13. Card plate; 14. Mounting back plate; 15. Control module; 16. Toggle block; 17. Insert sleeve; 18. Coil spring shaft; 19. Limiting slot; 20. Spring; 21. Guide rod; 22. Slide tube; 23. Screw; 24. Connecting slot; 25. Panel bracket; 26. Cover plate; 27. Cavity. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. An embodiment of this application discloses a step-down isolation device for residential photovoltaic systems.

[0028] The core of this application is to provide a step-down isolation device for residential photovoltaic systems.

[0029] Please refer to Figure 1 and Figure 2 .

[0030] The voltage reduction isolation device for residential photovoltaic systems provided in this application includes a protective housing 1, a control module 15, and a mounting backplate 14. The control module 15 is fixedly connected to one side of the mounting backplate 14. The protective housing 1 and the mounting backplate 14 are detachably connected, and after they are connected, the protective housing 1 provides a protective cover for the control module 15. An LCD screen 9 is optionally provided on the protective housing 1.

[0031] like Figures 1-3 As shown, a mating body is movably connected to the mounting backplate 14, and a docking structure is provided on the protective housing 1. The docking structure is used for the mating body to mate. When the two are mated together, the mating body and the mounting backplate 14 are relatively fixed. A fixing component 101 is provided between the protective housing 1 and the mating body. The fixing component 101 is used to fix the mating body and the protective housing 1 relatively. When the mating body and the protective housing 1 are fixed together, the mating body is also relatively fixed to the mounting backplate 14.

[0032] In one specific implementation, reference is made to... Figure 2 and Figure 3The mating body is a clamping plate 13. There are two clamping plates 13, located on opposite edges of the mounting back plate 14. The clamping plates 13 and the mounting back plate 14 are hinged, with the hinge axis parallel to the length direction of the edge of the mounting back plate 14. The clamping plates 13 are provided with protruding structures, and the mating structure is a limiting groove 19. There are also two limiting grooves 19, located on opposite outer walls of the protective housing 1. The length direction of the limiting grooves 19 is parallel to the hinge axis of the clamping plates 13, and the limiting grooves 19 allow the protruding structures of the clamping plates 13 to be inserted. The hinge axis of the clamping plates 13 relative to the mounting back plate 14 is a coil spring shaft 18. In its natural state, when the mounting back plate 14 and the protective housing 1 are mated, the coil spring shaft 18 causes the clamping plates 13 to have a flipping tendency to insert the protruding structures into the limiting grooves 19, so that the clamping plates 13 can automatically mate with the limiting grooves 19 of the protective housing 1. A sleeve 11 is connected to the mounting back plate 14. The sleeve 11 is located on the same side as the control module 15, and the axis of the sleeve 11 is perpendicular to the plate surface of the mounting back plate 14. A plug rod 10 is connected to the protective housing 1. The sleeve 11 allows the plug rod 10 to be inserted coaxially. The cooperation between the sleeve 11 and the plug rod 10 is used to enable the protective housing 1 and the mounting back plate 14 to be quickly positioned relative to each other, creating conditions for the protruding structure of the clamping plate 13 to be automatically inserted into the limiting groove 19.

[0033] like Figure 2 and Figure 3 As shown, the fixing assembly 101 includes a slide tube 22, a plug 17, a spring 20, and a guide rod 21. The slide tube 22 and the clamping plate 13 are slidably connected, and the sliding direction is perpendicular to the axis of the coil spring shaft 18. The guide rod 21 and the clamping plate 13 are fixedly connected, and the slide tube 22 and the spring 20 are coaxially sleeved on the guide rod 21. The insert 17 is located on the groove wall of the limiting groove 19 and is fixedly connected to the protective housing 1. The axis of the insert 17 is perpendicular to the groove depth direction of the limiting groove 19. After the protruding structure of the clamping plate 13 enters the limiting groove 19, the slide tube 22 and the insert 17 are coaxially aligned. The spring 20 always applies a pushing force to the slide tube 22 toward the insert 17 so that the end of the slide tube 22 automatically inserts into the opening of the insert 17. After the end of the slide tube 22 is inserted into the opening of the insert 17, the protruding structure of the clamping plate 13 cannot be withdrawn from the limiting groove 19 and the clamping plate 13 cannot be flipped, thereby achieving the relative fixation of the clamping plate 13, the mounting back plate 14 and the protective housing 1.

[0034] like Figure 2 and Figure 3 As shown, each clamping plate 13 has two guide rods 21. A cavity 27 is provided inside the clamping plate 13 for the guide rods 21 and the slide tube 22. When disassembling the clamping plate 13, the slide tube 22 needs to be removed from the insert 17. To improve ease of disassembly, an operating groove 12 is provided on the outer side of the clamping plate 13, and a lever 16 is movably connected to the operating groove 12. The lever 16 is fixedly connected to the side wall of the slide tube 22. The operator can control the sliding of the slide tube 22 by applying force to the lever 16, thereby easily controlling the position of the slide tube 22.

[0035] The aforementioned step-down isolation device for residential photovoltaic systems effectively solves the problem of cumbersome installation and disassembly of the backplate 14 and protective housing 1, and improves the ease of operation during the maintenance of the control module 15.

[0036] The voltage reduction isolation device for residential photovoltaic systems provided in this application will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0037] In one specific implementation, reference is made to... Figure 1 and Figure 4 .

[0038] Specifically, a set of step-down isolation device control modules 15 consists of numerous components. The protective housing 1 includes multiple sub-housings, each corresponding to an independent mounting backplate 14. The multiple sub-housings are arranged horizontally. Each sub-housing has multiple pins 7 and multiple slots 6. The pins 7 and slots 6 are used to engage adjacent sub-housings. Taking a pair of adjacent sub-housings as an example, one sub-housing is the left housing 5, and the other is the right housing 8. The left housing 5 has four slots 6 on its right side, and the right housing 8 has four pins 7 fixedly connected to its left side. All slots 6 and pins 7 are arranged vertically, and the axes of the pins 7 and slots 6 are horizontal. Each slot 6 allows one pin 7 to be coaxially inserted. The protective housing 1 is equipped with a limiting component to prevent the pin 7 from retracting into the slot 6.

[0039] like Figure 1 and Figure 4 As shown, the limiting component is a screw 23, and the pin 7 has a connecting groove 24. The operating groove 12 of the connecting groove 24 is vertical. The screw 23 passes vertically through the left housing 5. At the same time, the screw 23 also passes through the connecting grooves 24 of each pin 7 from top to bottom. At this time, the pin 7 cannot be withdrawn from the slot 6. The uppermost connecting groove 24 is a threaded groove. The screw 23 is threadedly connected to the uppermost pin 7 through the threaded groove, thereby achieving relative fixation of the screw 23, the pin 7, and the protective housing 1. The left housing 5 and the right housing 8 are thus connected and fixed.

[0040] Based on any of the above embodiments, refer to Figure 1 and Figure 5 .

[0041] Specifically, the protective housing 1 is provided with multiple mounting bases 2, with two mounting bases 2 on each sub-housing. Each mounting base 2 includes a fixing rod 4 and a panel bracket 25. There are two fixing rods 4, located at the upper and lower edges of the panel bracket 25 respectively. The fixing rods 4 and the protective housing 1 are connected by bolts, which pass through the fixing rods 4 and are screwed into the outer wall of the protective housing 1. The panel bracket 25 is provided with wire grooves 3 for the wiring harness of the control module 15 to pass through. There are six wire grooves 3 on each panel bracket 25.

[0042] like Figure 5 As shown, a cover plate 26 is hinged to the panel bracket 25. When a wire groove 3 does not pass through the bundle, the cover plate 26 is used to cover the wire groove 3 to prevent foreign objects from entering the wire groove 3. The hinge axis of the cover plate 26 is horizontal. The cover plate 26 is provided with a protrusion. When the cover plate 26 covers the wire groove 3, the protrusion of the cover plate 26 enters the wire groove 3 and abuts against the groove wall of the wire groove 3. Friction is generated between the groove wall of the wire groove 3 and the protrusion of the cover plate 26, so that the covering state of the wire groove 3 by the cover plate 26 can maintain a certain stability.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0044] The above provides a detailed description of a voltage reduction isolation device for residential photovoltaic systems provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A step-down isolation device for household photovoltaic, comprising a protective shell (1), a control module (15) and a mounting back plate (14), the control module (15) is fixedly arranged on the mounting back plate (14), and the mounting back plate (14) and the shell are detachably connected, characterized in that, A mating body is movably connected to the mounting back plate (14), and a docking structure is provided on the protective shell (1). The docking structure is used for the mating body to mate. When the mating body and the docking structure mate, the mating body and the mounting back plate (14) are relatively fixed. A fixing component (101) is provided between the protective shell (1) and the mating body. The fixing component (101) is used to fix the mating body and the protective shell (1) relatively.

2. A voltage reduction isolation device for domestic photovoltaics according to claim 1, characterised in that, The mating body is a clamping plate (13), which is located at the edge of the mounting back plate (14). The clamping plate (13) is provided with a protruding structure, and the docking structure is a limiting groove (19), which is used for the protruding structure of the clamping plate (13) to be inserted.

3. A voltage reduction isolation device for domestic photovoltaics according to claim 2, characterised in that, The card plate (13) and the mounting back plate (14) are hinged together. The hinge axis of the card plate (13) is perpendicular to the groove depth direction of the limiting groove (19). The hinge axis of the card plate (13) relative to the mounting back plate (14) is a coil spring shaft (18). In its natural state, the card plate (13) has a flipping tendency to insert the protruding structure into the limiting groove (19).

4. Voltage reduction isolation device for domestic photovoltaics according to claim 2 or 3, characterized in that The fixing component (101) includes a slide tube (22) and a plug (17). The slide tube (22) and the clamping plate (13) are slidably connected. The plug (17) and the protective shell (1) are fixedly connected. The axis of the plug (17) is perpendicular to the groove depth direction of the limiting groove (19). After the protrusion structure of the clamping plate (13) enters the limiting groove (19), the plug (17) is used for the slide tube (22) to be inserted.

5. A voltage reduction isolation device for domestic photovoltaics according to claim 4, characterised in that, The fixing assembly (101) also includes a spring (20) and a guide rod (21). The slide tube (22) and the spring (20) are both sleeved on the guide rod (21). The guide rod (21) and the clamping plate (13) are fixedly connected. One end of the spring (20) is connected to the clamping plate (13), and the other end is connected to the slide tube (22). The spring (20) applies a thrust toward the insert (17) to the slide tube (22).

6. A voltage reducing isolation device for domestic photovoltaics according to claim 2 or 3, characterised in that, A sleeve tube (11) is connected to the mounting back plate (14), and an insertion rod (10) is connected to the protective shell (1). The sleeve tube (11) is for the insertion rod (10) to be inserted coaxially.

7. A voltage reducing isolation device for domestic photovoltaics according to any of claims 1-3, characterized in that, The protective housing (1) includes multiple sub-housings, each sub-housing is connected to a mounting backplate (14), and multiple pins (7) are connected to the sub-housings and multiple slots (6) are provided. The pin (7) on one of the sub-housings is inserted into the slot (6) on the adjacent sub-housing. The protective housing (1) is provided with a limiting member, which is used to stop and limit the pin (7) entering the slot (6).

8. A voltage reduction isolation device for domestic photovoltaics according to claim 7, characterised in that, The multiple slots (6) on the sub-shell are oriented and arranged in a specific direction. The pin (7) is provided with a connecting groove (24). The limiting member is a screw (23). The length direction of the screw (23) is parallel to the arrangement direction of the multiple pins (7). The screw (23) passes through the connecting grooves (24) of all the pins (7). One of the connecting grooves (24) is a threaded groove. The screw (23) is threadedly connected to the pin (7) through the threaded groove.

9. A voltage reducing isolation device for domestic photovoltaics according to any of claims 1-3, characterized in that, The protective housing (1) is provided with an assembly base (2), which includes a fixing rod (4) and a panel bracket (25). The fixing rod (4) is connected to the edge of the panel bracket (25) and is connected to the protective housing (1). The panel bracket (25) is provided with a wire groove (3) for the wire harness of the control module (15) to pass through.

10. The voltage reduction isolation device for residential photovoltaics of claim 9, wherein, A cover plate (26) is hinged to the panel support (25). The cover plate (26) is used to cover the wire groove (3). The cover plate (26) has a protrusion. When the cover plate (26) covers the wire groove (3), the protrusion of the cover plate (26) enters the wire groove (3).

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