A photovoltaic junction box

Abstract

The present invention discloses a photovoltaic junction box, which relates to the technical field of photovoltaic power generation. It includes a box body, a box cover, a terminal assembly, a patch diode, a placement rack and a wiring assembly. The box cover is installed on the box body. A clamping platform is arranged at the bottom end of the box body, and a clamping groove is arranged on the clamping platform. A first clamping head is correspondingly arranged at the bottom end of the placement rack, and the placement rack is clamped in the clamping groove through the first clamping head. An installation groove is arranged on one side of the clamping platform, and the wiring assembly is arranged in the installation groove. A wiring post is arranged on the other side of the clamping platform, and a second clamping head is arranged at the top end of the wiring post. The terminal assembly is clamped at the top end of the placement rack. The terminal assembly is provided with a first wiring head and a second wiring head. The first wiring head is fixedly connected to the wiring assembly, and the second wiring head is clamped on the second clamping head. The patch diode is arranged between adjacent terminal assemblies. The structure of the present invention is simple, the manufacturing cost is low, and the heat resistance performance is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic junction box. Background Art

[0002] A photovoltaic junction box is a connector between a solar cell module that forms a solar cell array and a solar charging control device. Through the junction box, the electricity generated by the solar cell module is connected to an external circuit, that is, the lead-out wire of the module is connected to the internal circuit of the junction box, and the internal circuit of the junction box is then connected to the external circuit. During the operation of the junction box, reverse current will be generated inside the junction box, causing the diode to heat up, resulting in an increase in the temperature inside the junction box. Over time, this will affect the junction box and the components inside the junction box, causing damage to the junction box.

[0003] Therefore, how to provide a photovoltaic junction box that can quickly dissipate heat and avoid the high temperature generated by the diode from burning the box body has become a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a photovoltaic junction box. The structure of the present invention is simple. By suspending the terminal assembly and cooperating with a heat sink for heat dissipation, heat dissipation and rapid heat transfer of the photovoltaic junction box are realized, and the reliability of the junction box is improved.

[0005] To achieve the above object, the present invention adopts the following technical solutions: It includes a box body, a box cover, a terminal assembly, a surface-mounted diode, a placement rack, and a wiring assembly. The box cover is installed on the box body. A clamping platform is provided at the bottom end of the box body, and a clamping groove is provided on the clamping platform. A first clamping head is correspondingly provided at the bottom end of the placement rack, and the placement rack is clamped in the clamping groove through the first clamping head. An installation groove is provided on one side of the clamping platform, and the wiring assembly is arranged in the installation groove. A wiring post is provided on the other side of the clamping platform, and a second clamping head is provided at the top end of the wiring post. The terminal assembly is clamped at the top end of the placement rack. The terminal assembly is provided with a first wiring head and a second wiring head. The first wiring head is fixedly connected to the wiring assembly, and the second wiring head is clamped on the second clamping head. The surface-mounted diode is arranged between adjacent terminal assemblies.

[0006] Further, the wiring assembly includes a clamping box, a wire pressing frame, a compression spring, and a movable pressing plate. The compression spring and the movable pressing plate are arranged in the wire pressing frame. One end of the compression spring is fixedly connected to the wire pressing frame, and the other end of the compression spring is fixedly connected to the movable pressing plate. The wire pressing frame is arranged in the clamping box, and a first wiring hole is provided on the side of the wire pressing frame away from the movable pressing plate.

[0007] Further, L-shaped clamping heads are provided at both ends of the installation groove, and clamping bosses are correspondingly provided at the bottom of both ends of the clamping box.

[0008] Further, through holes in the shape of rectangles are formed in two side plates of the clamping box. A first terminal block mounting groove for cooperating with and mounting the first terminal block is provided on one side of the clamping box close to the movable pressure plate, and a second wiring hole is provided on the side of the clamping box away from the movable pressure plate.

[0009] Further, a clamping plate is provided on one side of the placement rack, and a limiting hole is correspondingly provided on the terminal assembly.

[0010] Further, a heat dissipation groove is formed at the top end of the box cover, and a waterproof and breathable film is covered on the heat dissipation groove.

[0011] Further, heat dissipation fins are installed below the heat dissipation groove. Elastic components are arranged at four corners of the heat dissipation fins. The elastic components include a first sleeve, a second sleeve, and a flexible spring. The first sleeve is fixedly connected to the box cover. One end of the second sleeve is slidably sleeved in the first sleeve, the other end of the second sleeve is fixedly connected to the heat dissipation fin, and the flexible spring is arranged in the first sleeve and the second sleeve.

[0012] Further, stepped drainage holes are provided at the bottom corners of the box body.

[0013] Further, a limiting groove is provided on one side of the box body, and a pressing block is arranged in the limiting groove.

[0014] Further, a sealing groove is formed at the edge of the box body, and a sealing strip is correspondingly arranged at the edge of the box cover.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The structure of the present invention is simple. The support frame and the wiring assembly are both installed at the bottom end of the box body in a clamping manner, which is convenient for automatic assembly and maintenance.

[0017] 2. By suspending the terminal assembly in the junction box, the present invention can achieve a good heat dissipation effect, avoid short circuits of the circuit caused by water entering the junction box, and only the placement rack that fits the terminal assembly needs to be made of heat-resistant materials, reducing the cost of the junction box and facilitating cost control.

[0018] 3. The waterproof and breathable film and the heat dissipation fins on the box cover are beneficial to the heat dissipation of the terminal assembly and the patch diode. The elastic components can not only ensure the fitting of the heat dissipation fins with the patch diode and the terminal assembly, further improving the heat dissipation of the junction box, but also prevent the heat dissipation fins from expanding due to heat when directly attached to the patch diode, squeezing the terminal assembly and deforming it, resulting in a gap between the heat dissipation fins and the patch diode and affecting heat dissipation. The waterproof and breathable film and the sealing strip can also achieve a good waterproof effect, and the stepped drainage holes facilitate the drainage of the junction box.

[0019] 4. The arrangement of the wiring component, which connects the movable baffle and the terminal component through a spring, facilitates the installation of the bus bar and the connection of the circuit. Description of the Drawings

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal assembly of the box body of the present invention.

[0022] Figure 3 This is a schematic diagram of the box body structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the assembly of the clamping box of the present invention.

[0024] Figure 5 This is a schematic diagram of the assembly of the placement rack of the present invention.

[0025] Figure 6 This is a schematic diagram of the structure of the wire pressing frame of the present invention.

[0026] Figure 7 This is a schematic diagram of the structure of the placement rack of the present invention.

[0027] Figure 8 This is a cross-sectional view of the stepped drain hole of the present invention.

[0028] Figure 9 This is a schematic diagram of the structure of the box cover of the present invention.

[0029] Figure 10 This is a cross-sectional view of the elastic component of the box cover of the present invention.

[0030] Among them, 1 - box body; 2 - box cover; 3 - terminal component; 4 - surface mount diode; 5 - placement rack; 6 - sealing groove; 7 - sealing strip; 8 - waterproof and breathable film; 9 - heat sink; 10 - first sleeve; 11 - second sleeve; 12 - flexible spring; 13 - wiring hole; 14 - limiting groove; 15 - pressing block; 16 - stepped drain hole; 17 - clamping platform; 18 - clamping groove; 19 - first clamping head; 20 - installation groove; 21 - wiring post; 22 - second clamping head; 23 - first wiring head; 24 - second wiring head; 25 - clamping box; 26 - wire pressing frame; 27 - compression spring; 28 - movable pressing plate; 29 - L-shaped clamping head; 30 - clamping boss; 31 - rectangular groove; 32 - first wiring head installation groove; 33 - first wiring hole; 34 - second wiring hole; 35 - clamping plate. Detailed Embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "horizontal", "inner", "outer", "one side", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 should not be construed as a limitation to the present invention. The terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Embodiment 1

[0034] As Figure 1-6 shown, the present invention discloses a photovoltaic junction box, which includes a box body 1, a box cover 2, a terminal assembly 3, a surface mount diode 4, a placement rack 5 and a wiring assembly. A sealing groove 6 is provided at the edge of the box body 1, and a sealing strip 7 is correspondingly provided at the edge of the box cover 2. The box cover 2 is installed on the box body 1. A heat dissipation groove is provided at the top of the box cover 2, and a waterproof breathable film 8 is covered on the heat dissipation groove. A heat sink 9 is installed below the heat dissipation groove. Heat dissipation fins are provided on one side of the heat sink 9 close to the heat dissipation groove. Elastic components are provided at the four corners of the heat sink 9. The elastic components include a first sleeve 10, a second sleeve 11 and a flexible spring 12. The first sleeve 10 is fixedly connected to the box cover 2. One end of the second sleeve 11 is slidably sleeved in the first sleeve 10, and the other end of the second sleeve 11 is fixedly connected to the heat sink 9. The flexible spring 12 is arranged in the first sleeve 10 and the second sleeve 11. Through the arrangement of the elastic components, it is not only convenient for the heat sink 9 to fit with the terminal assembly 3 in the box body 1, absorb the heat generated by the terminal assembly 3, and dissipate the heat through the heat dissipation groove, but also avoid that when the heat sink 9 is directly attached to the surface mount diode 4, the heat sink 9 expands due to heat, squeezes the terminal assembly 3 to deform, resulting in a gap between the heat sink 9 and the surface mount diode 4, affecting heat dissipation. The waterproof breathable film 8 can not only keep the air permeability of the junction box, but also play a good waterproof effect.

[0035] On one side of the outer wiring of the box body, there is a wiring hole 13. At the wiring hole 13, there is a limiting groove 14. Inside the limiting groove 14, there is a pressing block 15. The pressing block 15 is used to fix the outer wiring to prevent the outer wiring from separating from the junction box under the action of external force. At the bottom corner of the box body 1, there is a stepped drain hole 16, which is convenient for quickly draining water after the box body 1 is filled with water. At the bottom of the box body 1, there is a clamping platform 17. On the clamping platform 17, there is a clamping groove 18. Correspondingly, at the bottom of the placement rack 5, there is a first clamping head 19. The placement rack 5 is clamped in the clamping groove 18 through the first clamping head 19. On one side of the clamping platform 17, there is an installation groove 20, and the wiring component is arranged in the installation groove 20. On the other side of the clamping platform 17, there is a wiring post 21. At the top of the wiring post 21, there is a second clamping head 22. On one side of the placement rack 5, there is a clamping plate 35. The terminal component 3 is correspondingly provided with a limiting hole. The terminal component 3 is clamped at the top of the placement rack 5 through the limiting hole. The terminal component 3 is provided with a first wiring head 23 and a second wiring head 24. The first wiring head 23 is fixedly connected to the wiring component, and the second wiring head 24 is clamped on the second clamping head 22. The patch diode 4 is arranged between adjacent terminal components 3. The patch diode 4 and the terminal component 3 are coated with a thermally conductive insulating glue, which is convenient for fitting with the heat sink 9. In this embodiment, the placement rack 5 is made of modified polyphenylene ether material, with high strength, outstanding electrical insulation and heat resistance, and is not prone to thermal deformation. The terminal component 3 is suspended by the placement rack 5, which not only avoids the contact between the terminal component 3 and the bottom of the junction box, can achieve a good heat dissipation effect, but also can avoid the short circuit of the circuit caused by the water ingress of the junction box.

[0036] The wiring component includes a clamping box 25, a wire pressing frame 26, a compression spring 27 and a movable pressing plate 28. At both ends of the installation groove 20 of the junction box, there are L-shaped clamping heads 29. At the corresponding positions at the bottoms of both ends of the clamping box 25, there are clamping bosses 30. The clamping box 25 is installed in the installation groove 20 of the junction box through the clamping bosses 30. A wire pressing frame 26 is installed in the clamping box 25. Through rectangular slots 31 are opened on the two side plates of the clamping box 25. On one side of the clamping box 25 close to the movable pressing plate 28, there is a first wiring head installation groove 32. The first wiring head 23 is arranged in the first wiring head installation groove 32 and is fixedly connected to the wire pressing frame 26. A compression spring 27 and a movable pressing plate 28 are arranged in the wire pressing frame 26. One end of the compression spring 27 is fixedly connected to the wire pressing frame 26, and the other end of the compression spring 27 is fixedly connected to the movable pressing plate 28. The setting of the rectangular slot 31 is convenient for the installation of the bus bar. The setting of the compression spring 27 is convenient for fixing the bus bar. On the side of the wire pressing frame 26 away from the movable pressing plate 28, there is a first wiring hole 33. Correspondingly, on the side of the clamping box 25 away from the movable pressing plate 28, there is a second wiring hole 34, which is convenient for connecting the circuit.

[0037] The above are only the preferred embodiments of the present invention, and do not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A photovoltaic junction box, characterized in that: It includes a box body, a box cover, a terminal component, a surface-mounted diode, a placement rack and a wiring component. The box cover is installed on the box body. A clamping platform is provided at the bottom end of the box body, and a clamping groove is provided on the clamping platform. A first clamping head is correspondingly provided at the bottom end of the placement rack, and the placement rack is clamped in the clamping groove through the first clamping head. An installation groove is provided on one side of the clamping platform, and the wiring component is arranged in the installation groove. A wiring post is provided on the other side of the clamping platform, and a second clamping head is provided at the top end of the wiring post. The terminal component is clamped at the top end of the placement rack. The terminal component is provided with a first wiring head and a second wiring head. The first wiring head is fixedly connected to the wiring component, and the second wiring head is clamped on the second clamping head. The surface-mounted diode is arranged between adjacent terminal components; The wiring component includes a clamping box, a wire pressing frame, a compression spring and a movable pressing plate. The compression spring and the movable pressing plate are arranged in the wire pressing frame. One end of the compression spring is fixedly connected to the wire pressing frame, and the other end of the compression spring is fixedly connected to the movable pressing plate. The wire pressing frame is arranged in the clamping box, and a first wiring hole is provided on the side of the wire pressing frame away from the movable pressing plate; L-shaped clamping heads are provided at both ends of the installation groove, and clamping bosses are correspondingly provided at the bottom of both ends of the clamping box.

2. The photovoltaic junction box according to claim 1, wherein Rectangular grooves penetrating through are provided on the two side plates of the clamping box. A first wiring head installation groove for cooperating with the first wiring head is provided on the side of the clamping box close to the movable pressing plate, and a second wiring hole is provided on the side of the clamping box away from the movable pressing plate.

3. A photovoltaic junction box according to claim 1, characterized in that, A clamping plate is provided on one side of the placement rack, and a limiting hole is correspondingly provided on the terminal component.

4. A photovoltaic junction box according to claim 1, characterized in that, A heat dissipation groove is provided at the top end of the box cover, and a waterproof and breathable film covers the heat dissipation groove.

5. The photovoltaic junction box according to claim 4, wherein A heat sink is installed below the heat dissipation groove. Elastic components are provided at the four corners of the heat sink. The elastic component includes a first sleeve, a second sleeve and a flexible spring. The first sleeve is fixedly connected to the box cover. One end of the second sleeve is slidably sleeved in the first sleeve, and the other end of the second sleeve is fixedly connected to the heat sink. The flexible spring is arranged in the first sleeve and the second sleeve.

6. A photovoltaic junction box according to claim 1, characterized in that, Step drainage holes are provided at the bottom corners of the box body.

7. A photovoltaic junction box according to claim 1, characterized in that, A limiting groove is provided on one side of the box body, and a pressing block is arranged in the limiting groove.

8. A photovoltaic junction box according to claim 1, characterized in that, A sealing groove is provided at the edge of the box body, and a sealing strip is correspondingly provided at the edge of the box cover.

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