Photovoltaic junction box

Abstract

The utility model relates to a photovoltaic junction box, and relates to the technical field of photovoltaic accessories, the photovoltaic junction box comprises a wiring shell, a photovoltaic module and a wiring end cover, the wiring shell comprises a shell main body, a wiring part connected with the shell main body and a wiring board installed at the bottom of the wiring part; the shell main body is provided with an arrangement cavity for arranging a photovoltaic module; a wiring ring groove is formed between the wiring part and the wiring board; a sealing structure is arranged between the shell main body and the wiring end cover; the sealing structure comprises a sealing groove formed in the opening of the shell body, a sealing ring arranged in the sealing groove and used for being matched with the wiring end cover in an abutting mode, and abutting protruding edges arranged on the inner side wall of the arrangement cavity in the circumferential direction at intervals and used for abutting against the inner side of the sealing ring. The wiring end cover is provided with an abutting face used for being matched with the top of the sealing ring in an abutting mode. The photovoltaic junction box has the effect of improving the sealing degree of the photovoltaic junction box.

Description

Technical Field

[0001] This application relates to the field of photovoltaic accessory technology, and in particular to a photovoltaic junction box. Background Technology

[0002] Photovoltaic junction boxes are an important component for protecting photovoltaic modules. In practical applications, photovoltaic junction boxes need to be exposed to harsh environmental conditions for extended periods, such as high temperature, high humidity, dust, and salt spray. Therefore, both the photovoltaic junction box and the photovoltaic module require sealing treatment.

[0003] In existing technology, a photovoltaic junction box includes a junction housing, a photovoltaic module, and a terminal cover. The junction housing has an opening at the top for arranging the photovoltaic module and a terminal ring groove for the photovoltaic cables connecting the module to pass through. Typically, the photovoltaic module is first installed in the arrangement chamber, then the junction housing is installed on the photovoltaic panel; then, adhesive is injected into the arrangement chamber to encapsulate the photovoltaic module; finally, the terminal cover closes the junction housing, thereby sealing the photovoltaic module inside the junction housing.

[0004] Regarding the aforementioned technologies, the inventors believe that the sealing performance of photovoltaic junction boxes needs to be improved when facing harsher marine environments. Utility Model Content

[0005] To improve the sealing performance of photovoltaic junction boxes, this application provides a photovoltaic junction box.

[0006] The photovoltaic junction box provided in this application adopts the following technical solution:

[0007] A photovoltaic junction box includes a junction housing, a photovoltaic module installed within the junction housing, and a terminal cover for closing the junction housing. The junction housing has an arrangement chamber for arranging the photovoltaic module and a terminal ring groove communicating with the arrangement chamber and for allowing cables connecting the photovoltaic module to pass through. A sealing structure is provided between the housing body and the terminal cover. The sealing structure includes a sealing groove formed at an opening in the housing body, a sealing ring arranged in the sealing groove and for abutting against the terminal cover, and abutting protrusions circumferentially spaced on the inner sidewall of the arrangement chamber and for abutting against the inner side of the sealing ring. The terminal cover has an abutting surface for abutting against the top of the sealing ring.

[0008] By adopting the above technical solution, a sealing structure is set between the terminal housing and the terminal cover. When the sealing ring is arranged in the sealing groove, the abutting ridge can support the inner wall of the sealing ring. When the terminal cover closes the terminal housing, the abutting surface of the terminal cover can abut against the top surface of the sealing ring arranged in the sealing groove, pressing the sealing ring tightly in the sealing groove, thereby achieving a seal between the terminal housing and the terminal cover, which helps to improve the sealing degree of the photovoltaic junction box.

[0009] Optionally, the sealing ring includes a sealing body, a first sealing ridge arranged circumferentially on the top surface of the sealing body, and a second sealing ridge arranged circumferentially on the bottom surface of the sealing body.

[0010] By adopting the above technical solution, the specific structure of the sealing ring is disclosed. When the contact surface of the terminal cover abuts against the sealing ring, the first sealing ridge and the second sealing ridge are simultaneously compressed and deformed, thereby ensuring that the second sealing ridge and the bottom surface of the sealing groove are fully in contact, and the first sealing ridge and the contact surface of the terminal cover are fully in contact, thus further improving the sealing degree of the photovoltaic junction box.

[0011] Optionally, the top surface of the sealing ring is provided with two first sealing ridges spaced apart circumferentially; the bottom surface of the sealing ring is provided with two second sealing ridges spaced apart circumferentially.

[0012] By adopting the above technical solution, the two first sealing protrusions provide a double sealing effect when they abut against the contact surface. Even if one of the first sealing protrusions fails due to damage, the other first sealing protrusion can still maintain contact with the contact surface. Similarly, the two second sealing protrusions provide a double sealing effect when they abut against the bottom surface of the sealing groove. Even if one of the second sealing protrusions fails due to damage, the other second sealing protrusion can still maintain contact with the bottom surface of the sealing groove. This further improves the sealing degree of the photovoltaic junction box.

[0013] Optionally, the bottom of the wiring part is symmetrically provided with abutment blocks on both sides of the wiring ring groove, and the abutment blocks have abutment slopes; the wiring plate is provided with abutment blocks for abutting and cooperating with the abutment blocks, and abutment slopes are provided on the abutment blocks for abutting and cooperating with the abutment slopes.

[0014] By adopting the above technical solution, by setting an abutment block in the wiring part and an abutment stop block in the wiring plate, when the wiring plate is installed at the bottom of the wiring part, the abutment bevel and the abutment bevel can abut, so that the sealing effect between the wiring plate and the wiring part is better.

[0015] Optionally, the wiring housing has a sealing ring groove at the wiring ring groove and a second sealing ring is installed in the sealing ring groove.

[0016] By adopting the above technical solution, when the cable passes through the terminal ring groove, the second sealing ring is fitted on the outer wall of the cable and abuts against the sealing ring groove, thereby achieving a seal between the cable and the terminal ring groove, thus improving the sealing degree of the photovoltaic junction box.

[0017] Optionally, the bottom of the wiring housing is provided with a glue flow channel that extends through the upper and lower surfaces and communicates with the arrangement chamber.

[0018] By adopting the above technical solution, and by setting a glue flow channel in the wiring housing, when glue is injected into the arrangement cavity of the wiring housing, some of the glue can flow along the glue flow channel to the photovoltaic panel, and form a glue layer between the bottom surface of the wiring housing and the photovoltaic panel, thereby achieving a seal between the wiring housing and the photovoltaic panel.

[0019] Optionally, the bottom surface of the wiring housing is provided with a glue flow groove in the circumferential direction, and glue flow through holes penetrating the upper and lower surfaces are spaced apart on the bottom surface of the glue flow groove.

[0020] By adopting the above technical solution, the setting of the glue flow channel and glue flow through hole allows the glue in the arrangement chamber to flow to the photovoltaic panel more quickly and form a ring of glue layer in the glue flow channel. It can also reduce the probability of unfilled glue areas between the bottom surface of the wiring housing and the photovoltaic panel, thereby further improving the sealing effect between the wiring housing and the photovoltaic panel.

[0021] Optionally, the wiring housing and the wiring end cover are connected by a snap-fit ​​structure. The snap-fit ​​structure includes a snap-fit ​​protrusion disposed on the outer side wall of the wiring housing and a snap-fit ​​part disposed on the inner side wall of the wiring end cover and used to cooperate with the snap-fit ​​protrusion. The snap-fit ​​part has a snap-fit ​​groove for the snap-fit ​​protrusion to be snapped into.

[0022] By adopting the above technical solution, a snap-fit ​​structure is set between the wiring housing and the wiring end cover. When the wiring end cover closes the wiring housing, the snap-fit ​​protrusion can be snapped into the snap-fit ​​groove, thereby fixing the wiring housing and the wiring end cover without the need for additional tools, simplifying the installation process.

[0023] Optionally, the inner sidewall of the terminal cover is provided with reinforcing ribs at intervals in the circumferential direction.

[0024] By adopting the above technical solution, the addition of reinforcing ribs can improve the structural strength of the terminal cover, which helps to reduce the bending or cracking of the terminal cover during long-term use.

[0025] Optionally, the housing body is provided with at least two support columns on the bottom surface of the arrangement chamber for supporting the photovoltaic module.

[0026] By adopting the above technical solution, the support column can support the photovoltaic module and maintain a specified distance from the inner bottom surface of the wiring housing. This allows the adhesive to better wrap the photovoltaic module when it is injected into the arrangement chamber, which helps to improve the sealing effect of the photovoltaic module.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. A photovoltaic junction box, wherein a sealing structure is provided between the junction box housing and the junction box end cover, and when the junction box end cover closes the junction box housing, the contact surface of the junction box housing can maintain contact with the top surface of the sealing ring, thereby achieving a seal between the junction box housing and the junction box end cover, and improving the sealing degree of the photovoltaic junction box;

[0029] 2. By setting a first sealing ridge on the top surface of the sealing body and a second sealing ridge on the bottom surface of the sealing body, when the contact surface of the terminal cover abuts against the sealing ring, the first sealing ridge deforms and remains in contact with the contact surface, and the second sealing ridge deforms and remains in contact with the bottom surface of the sealing groove, thereby further improving the sealing degree of the photovoltaic junction box.

[0030] 3. By setting a glue flow channel in the wiring housing, when glue is injected into the arrangement chamber, some glue can flow from the glue flow channel to the photovoltaic panel and form a glue layer between the bottom surface of the wiring housing and the photovoltaic panel, thus achieving a seal between the wiring housing and the photovoltaic panel. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0032] Figure 2 This is an exploded view of the overall structure in the embodiments of this application.

[0033] Figure 3 This is a schematic diagram of the wiring board in the embodiment of this application.

[0034] Figure 4 This is a schematic diagram of the bottom structure of the wiring housing without the wiring board in the embodiment of this application.

[0035] Figure 5 This is a schematic diagram of the bottom structure of the wiring housing in an embodiment of this application.

[0036] Figure 6 This is a schematic diagram of the terminal cover structure in an embodiment of this application.

[0037] Figure 7 This is a cross-sectional schematic diagram of the sealing ring in an embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Wiring housing; 11. Housing body; 111. Arrangement chamber; 112. Support column; 113. Glue flow channel; 114. Sealing groove; 115. Abutting protrusion; 1151. Abutting part; 12. Wiring part; 121. First half-groove; 122. First half-annular groove; 123. Abutting block; 1231. Abutting bevel; 13. Wiring plate; 131. Second half-groove; 132. Second half-annular groove; 133. Abutting stop; 1331. Abutting bevel; 134. 14. Abutting vertical bar; 14. Wiring ring groove; 141. Sealing ring groove; 15. Glue flow groove; 151. Glue flow through hole; 16. Snap-fit ​​protrusion; 2. Photovoltaic module; 21. Diode; 22. Copper sheet; 23. Photovoltaic cable; 3. Wiring end cap; 31. Reinforcing rib; 32. Second reinforcing rib; 33. Relief groove; 34. Abutting surface; 35. Snap-fit ​​part; 351. Snap-fit ​​groove; 4. Second sealing ring; 5. Sealing ring; 51. Sealing body; 52. First sealing protrusion; 53. Second sealing protrusion. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0040] This application discloses a photovoltaic junction box.

[0041] Reference Figure 1 The photovoltaic junction box includes a junction housing 1, a photovoltaic module 2, and a junction end cover 3. A sealing structure is provided between the junction housing 1 and the junction end cover 3, and the junction housing 1 and the junction end cover 3 are connected by a snap-fit ​​structure.

[0042] Reference Figure 2 The photovoltaic array includes a diode 21, a copper plate 22 connected to both ends of the diode 21, and a photovoltaic cable 23 connected to the copper plate 22.

[0043] Reference Figure 2 The wiring housing 1 includes a housing body 11, a wiring portion 12 connected to the housing body 11, and a wiring plate 13 installed at the bottom of the wiring portion 12. The housing body 11 and the wiring portion 12 are integrally formed. The housing body 11 has an opening at the top for arranging the photovoltaic module 2 in an arrangement chamber 111. A support column 112 for supporting the copper sheet 22 is provided at the bottom of the arrangement chamber 111 on the housing body 11. In this embodiment, there are four support columns 112, which are respectively arranged at the four corners of the arrangement chamber 111.

[0044] Reference Figure 2 , Figure 3 and Figure 4The bottom of the connector 12 is provided with a first semi-groove 121 for the photovoltaic cable 23 to pass through, and a first semi-annular groove 122 is formed at the first semi-groove 121. The connector 12 is symmetrically provided with abutment blocks 123 on both sides of the entrance and exit of the first semi-groove 121. The abutment blocks 123 have abutment slopes 1231 that are inclined downwards towards the outside of the contact portion 12. The connector plate 13 is provided with a second semi-groove 131 for the arrangement of the photovoltaic cable 23, and a second semi-annular groove 132 is formed at the second semi-groove 131. The connector plate 13 is provided with abutment stops 133 on both sides of the entrance and exit of the second semi-groove 131 for abutting with the abutment blocks 123, and abutment slopes 1331 for abutting with the abutment slopes 1231 are provided on the abutment stops 133. The top of the terminal block 13 is symmetrically provided with abutting vertical bars 134 on both sides of the second half-groove 131 and along the axis of the second half-groove 131. The cross-sections of the abutting diagonal bars 1331 and the abutting vertical bars 134 are both triangular.

[0045] Reference Figure 2 and Figure 4 When the terminal block 13 is installed at the bottom of the terminal section 12, the first half-groove 121 and the second half-groove 131 form a terminal ring groove 14 for arranging the photovoltaic cable 23. The terminal ring groove 14 communicates with the arrangement chamber 111, and the first half-groove 122 and the second half-groove 132 form a sealing ring groove 141. A second sealing ring 4 is also installed at the sealing ring groove 141. When installing the second sealing ring 4, firstly, the photovoltaic cable 23 is passed through the through hole of the second sealing ring 4; then, the second sealing ring 4 is installed in the first half-groove 122; then, the terminal block 13 is installed at the bottom of the terminal section 12, with the second half-groove 132 facing the first half-groove 122, so that the second half-groove 132 abuts against the bottom of the second sealing ring 4; finally, the connection between the terminal block 13 and the terminal section 12 is heated by a hot melt welding process, so that the connection between the terminal block 13 and the terminal section 12 is fused together, thereby fixing the terminal block 13 and the terminal section 12.

[0046] Reference Figure 4 and Figure 5 The wiring housing 1 has a glue-flowing channel 113 extending through its upper and lower surfaces at the bottom of the arrangement chamber 111. In this embodiment, there are three glue-flowing channels 113, which are spaced apart along the length of the housing body 11. By injecting glue into the arrangement chamber 111, the glue can wrap the photovoltaic module 2, and some of the glue can flow along the glue-flowing channel 113 to the bottom surface of the wiring housing 1 and between the photovoltaic panel.

[0047] Reference Figure 2 and Figure 5To minimize the probability of unfilled adhesive areas between the wiring housing 1 and the photovoltaic panel, a glue-flowing groove 15 is provided circumferentially on the bottom surface of the wiring housing 1, and a through-hole 151 penetrating the upper and lower surfaces is provided in the glue-flowing groove 15. Adhesive can flow into the glue-flowing groove 15 after passing through the glue-flowing hole 151, forming a ring of adhesive between the glue-flowing groove 15 and the photovoltaic panel.

[0048] Reference Figure 2 and Figure 6 The terminal cover 3 has a rectangular parallelepiped structure. Multiple reinforcing ribs 31 are spaced circumferentially on the inner sidewall of the terminal cover 3, and multiple vertically connected second reinforcing ribs 32 are provided on the inner top surface of the terminal cover 3. Arc-shaped clearance grooves 33 are provided on both side walls of the terminal cover 3 to mate with the wiring part 12.

[0049] Reference Figure 2 and Figure 6 The sealing structure includes a sealing groove 114 circumferentially opened at the opening of the housing body 11, abutting protrusions 115 circumferentially spaced on the inner wall of the arrangement chamber 111, and a sealing ring 5 arranged within the sealing groove 114. The terminal cover 3 has an abutting surface 34 for abutting and engaging with the sealing ring 5. The depth of the sealing groove 114 is less than the height of the sealing ring 5. The abutting protrusions 115 have an abutting portion 1151 extending vertically upward to the sealing groove 114; when the sealing ring 5 is installed in the sealing groove 114, the abutting portion 1151 abuts against the inner wall of the sealing ring 5.

[0050] Reference Figure 2 and Figure 7 The sealing ring 5 includes a sealing body 51, a first sealing ridge 52 circumferentially disposed on the top surface of the sealing body 51, and a second sealing ridge 53 circumferentially disposed on the bottom surface of the sealing body 51. The cross-sections of both the first sealing ridge 52 and the second sealing ridge 53 are semi-circular. In this embodiment, there are two first sealing ridges 52 spaced apart on the top surface of the sealing body 51, and two second sealing ridges 53 spaced apart on the bottom surface of the sealing body 51.

[0051] Reference Figure 2 and Figure 6The snap-fit ​​structure includes a snap-fit ​​protrusion 16 disposed on the top of the outer wall of the wiring housing 1 and a snap-fit ​​portion 35 disposed on the inner wall of the wiring terminal cover 3. The snap-fit ​​portion 35 has a snap-fit ​​groove 351 for the snap-fit ​​protrusion 16 to engage with. The cross-section of the snap-fit ​​protrusion 16 is generally a right-angled trapezoid, and the cross-section of the snap-fit ​​groove 351 is adapted to the cross-section of the snap-fit ​​protrusion 16. In this embodiment, there are four snap-fit ​​protrusions 16, with two snap-fit ​​protrusions 16 spaced apart along the length direction of the top of one outer wall of the wiring housing 1, and the other two snap-fit ​​protrusions 16 spaced apart along the length direction of the top of the other outer wall of the wiring housing 1. There are four snap-fit ​​portions 35, each corresponding to one of the snap-fit ​​protrusions 16.

[0052] Combination Figures 1 to 7 The implementation principle of a photovoltaic junction box in this application embodiment is as follows: When the junction box 1 is installed on the photovoltaic panel, glue is injected into the arrangement chamber 111, so that some glue flows from the glue flow channel 113 and the glue flow hole 151 to the space between the junction box 1 and the photovoltaic panel. Then, the junction box cover 3 is closed on the junction box 1, and the snap-fit ​​protrusion 16 is snapped into the snap-fit ​​groove 351 of the snap-fit ​​part 35. The abutment surface 34 of the junction box cover 3 can squeeze the sealing ring 5, so that the first sealing protrusion 52 is fully abutted with the abutment surface 34, and the second sealing protrusion 53 is fully abutted with the bottom surface of the sealing groove 114, thereby achieving a seal between the junction box 1 and the junction box cover 3.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A photovoltaic junction box comprising a junction casing (1), a photovoltaic module (2) and a junction end cover (3), the junction casing (1) comprising a casing body (11), a junction portion (12) connected to the casing body (11) and a junction plate (13) mounted at the bottom of the junction portion (12); the casing body (11) has a layout cavity (111) for arranging the photovoltaic module (2); a junction ring groove (14) is formed between the junction portion (12) and the junction plate (13) and communicates with the layout cavity (111) and is used for passing the cable connected to the photovoltaic module (2), characterized in that, A sealing structure is arranged between the shell body (11) and the terminal cover (3); the sealing structure comprises a sealing groove (114) arranged at the opening of the shell body (11), a sealing ring (5) arranged in the sealing groove (114) and used for abutting with the terminal cover (3), and an abutting ridge (115) circumferentially arranged on the inner side wall of the arrangement chamber (111) and used for abutting the inner side of the sealing ring (5); the terminal cover (3) has an abutting surface (34) used for abutting with the top of the sealing ring (5).

2. A photovoltaic junction box according to claim 1, characterized in that The sealing ring (5) comprises a sealing body (51), a first sealing ridge (52) circumferentially arranged on the top surface of the sealing body (51), and a second sealing ridge (53) circumferentially arranged on the bottom surface of the sealing body (51).

3. A photovoltaic junction box according to claim 2, wherein The top surface of the sealing ring (5) is circumferentially arranged with two first sealing ridges (52); the bottom surface of the sealing ring (5) is circumferentially arranged with two second sealing ridges (53).

4. A photovoltaic junction box according to claim 1, wherein The bottom of the terminal part (12) is symmetrically provided with an abutting block (123) on both sides of the terminal ring groove (14), and the abutting block (123) has an abutting inclined surface (1231); the terminal plate (13) is provided with an abutting stop block (133) used for abutting with the abutting block (123), and the abutting stop block (133) is provided with an abutting inclined strip (1331) used for abutting with the abutting inclined surface (1231).

5. A photovoltaic junction box according to claim 1, wherein The terminal shell (1) is provided with a sealing ring groove (141) at the terminal ring groove (14), and a second sealing ring (4) is arranged in the sealing ring groove (141).

6. A photovoltaic junction box according to claim 1, wherein The bottom of the terminal shell (1) is provided with a glue flow through groove (113) penetrating the upper and lower surfaces and communicating with the arrangement chamber (111).

7. A photovoltaic junction box according to claim 1, wherein The bottom surface of the terminal shell (1) is circumferentially provided with a glue flow groove (15), and the bottom surface of the glue flow groove (15) is circumferentially provided with a glue flow through hole (151) penetrating the upper and lower surfaces.

8. A photovoltaic junction box according to claim 1, wherein The terminal shell (1) and the terminal cover (3) are connected through a buckle structure, the buckle structure comprises a clamping protrusion (16) arranged on the outer side wall of the terminal shell (1) and a clamping portion (35) arranged on the inner side wall of the terminal cover (3) and used for abutting with the clamping protrusion (16), and the clamping portion (35) has a clamping groove (351) used for clamping the clamping protrusion (16).

9. A photovoltaic junction box according to claim 1, wherein The inner side wall of the terminal cover (3) is circumferentially arranged with a reinforcing rib (31).

10. A photovoltaic junction box according to claim 1, wherein The shell body (11) is provided with at least two supporting columns (112) arranged on the bottom surface of the arrangement chamber (111) and used for supporting the photovoltaic module (2).

Images