Photovoltaic junction box with waterproof and breathable function

Abstract

The utility model relates to photovoltaic junction box technical field discloses a photovoltaic junction box with waterproof and breathable function, including bottom box shell, the upper surface joint cooperation of bottom box shell has upper box shell, the both sides of bottom box shell front end all is provided with wiring mechanism, the wiring mechanism includes locating block, the middle part of locating block front end outer wall is provided with the connecting groove, the inner wall joint cooperation of connecting groove has the connecting block, the inside of bottom box shell is provided with sealing mechanism, sealing mechanism includes frame seal strip, arc seal strip, isolation clamping plate, isolation clamping groove, frame seal groove and arc seal groove. In the utility model, the photovoltaic junction box is formed by a plurality of component modules, so that the user can disassemble and replace the corresponding damaged parts according to the damaged requirements, and the installation clamping plate can be disassembled and replaced to replace the breathable film, thereby improving the service life and sealing effect of the junction box.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic junction box technology, and in particular to a photovoltaic junction box with waterproof and breathable functions. Background Technology

[0002] Photovoltaic junction boxes are mainly used to ensure safe connection, overload protection, and waterproof and dustproof protection of the DC output terminals of series or parallel photovoltaic modules, and to transfer faulty DC outputs to the combiner box or inverter system. Photovoltaics is a technology that uses the photoelectric effect to directly convert light energy into electrical energy. The core principle is that when photons shine on a semiconductor material, electrons in the material are excited to generate electron-hole pairs. These charge carriers form a current under the action of an electric field, thereby converting sunlight into electrical energy.

[0003] However, traditional photovoltaic junction boxes rely solely on sealing to prevent water from getting out of the box, making it difficult to actively expel moisture from inside. This can easily lead to condensation in environments with temperature differences or high humidity, resulting in insulation degradation and corrosion risks. Furthermore, the accumulation of moisture inside the box increases the probability of condensation, affecting the reliability of terminals and wiring.

[0004] Therefore, those skilled in the art have provided a photovoltaic junction box with waterproof and breathable functions to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a photovoltaic junction box with waterproof and breathable functions. This junction box is equipped with a sealing mechanism, forming a sealed chamber within the box through the cooperation of an isolation plate and an isolation slot. A breathable membrane is installed on the isolation plate, allowing the airflow inside the box to exchange and absorb the desiccant stored in the chamber, thereby venting moisture from the chamber. The breathable membrane links the airflow inside the box with the humidity management of the chamber, allowing water vapor to escape while preventing liquid water from entering, reducing the risk of condensation buildup. Furthermore, the cooperation between the sealing strip and the sealing slot allows the junction box to achieve both high sealing and waterproof performance while also allowing ventilation to expel moisture from the interior space, thus improving the waterproof and breathable effect of the junction box.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A photovoltaic junction box with waterproof and breathable function includes a bottom shell, an upper shell is snapped onto the upper surface of the bottom shell, and wiring mechanisms are provided on both sides of the front end of the bottom shell. The wiring mechanism includes a positioning block, a connecting groove is provided in the middle of the outer wall of the front end of the positioning block, and a connecting block is snapped onto the inner wall of the connecting groove.

[0008] The bottom housing is equipped with a sealing mechanism, which includes a frame-shaped sealing strip, an arc-shaped sealing strip, an isolation plate, an isolation slot, a frame-shaped sealing groove, and an arc-shaped sealing groove. The isolation plate has mounting slots on both sides of its upper surface. The upper end of the inner wall of the mounting slot has a fixing slot. The inner wall of the fixing slot is fitted with a fixing block. The middle of the lower surface of the fixing block is fixedly connected to the mounting plate. The inner wall of the mounting plate is fixedly connected to a breathable membrane.

[0009] Through the above technical solution, the photovoltaic junction box is composed of multiple component modules, which makes it easy for users to disassemble and replace the corresponding damaged parts according to the needs of the damage. It can also replace the breathable membrane by disassembling and replacing the mounting plate, thereby improving the service life and sealing effect of the junction box.

[0010] Furthermore, the positioning blocks are respectively fixedly connected to both sides of the outer wall of the front end of the bottom box, and a connecting line is fixedly connected to the middle of the outer wall of the front end of the connecting block;

[0011] The above technical solution enables external devices to connect to the connection conversion component inside the box via a connecting cable.

[0012] Furthermore, a threaded block is fixedly connected to the outer wall of the front end of the positioning block, and a sealing cap is threadedly fitted to the outer wall of the threaded block;

[0013] The above technical solution enables users to rotate the sealing cap with a tool to engage with the threaded block, thereby sealing and fixing the connecting block.

[0014] Furthermore, the frame-shaped sealing strip is fixedly connected to the upper surface of the bottom shell, the frame-shaped sealing groove is opened on the lower surface of the upper shell, and the frame-shaped sealing strip and the frame-shaped sealing groove are engaged.

[0015] The above technical solution allows the bottom shell to be tightly and fixed together with the upper shell through the snap-fit ​​between the frame-shaped sealing strip and the frame-shaped sealing groove.

[0016] Furthermore, the arc-shaped sealing strip is fixedly connected to the front end of the upper part of the outer wall of the positioning block, and the arc-shaped sealing grooves are respectively opened on both sides of the front end of the lower surface of the upper box shell, and the arc-shaped sealing strip and the arc-shaped sealing grooves are engaged.

[0017] The above technical solution allows the upper housing to be sealed and secured to the positioning block by the interlocking of the arc-shaped sealing strip and the arc-shaped sealing groove.

[0018] Furthermore, the isolation plate is fixedly connected to the middle of the bottom surface of the bottom box, and the isolation slot is opened in the middle of the top surface of the upper box, with the isolation plate and the isolation slot engaging in a snap-fit ​​relationship.

[0019] The above technical solution enables the isolation card plate to engage with the isolation card slot, thereby forming a second isolation layer inside the box.

[0020] Furthermore, lower fixing blocks are fixedly connected to the outer walls of the bottom box shell, and upper fixing blocks are fixedly connected to the outer walls of the upper box shell.

[0021] The above technical solution enables the bottom shell and the upper shell to be fixedly connected together by bolts between the upper fixing block and the lower fixing block.

[0022] Furthermore, a fixing bolt is threaded into the middle of the upper surface of the lower fixing block;

[0023] The above technical solution uses fixing bolts to lock and fix the upper fixing block and the lower fixing block together.

[0024] This utility model has the following beneficial effects:

[0025] 1. This utility model proposes a photovoltaic junction box with waterproof and breathable functions. Compared with most traditional photovoltaic junction boxes, this photovoltaic junction box is equipped with a sealing mechanism. Through the cooperation between the isolation plate and the isolation slot, a sealed chamber is formed inside the box. A breathable membrane is set on the isolation plate, which is used for the conversion and adsorption of airflow inside the box and desiccant stored in the chamber, thereby realizing the discharge of moisture inside the chamber. The breathable membrane links the airflow inside the box with the humidity management of the chamber, allowing water vapor to escape while blocking liquid water from entering, reducing the risk of condensation accumulation. In addition, the cooperation between the sealing strip and the sealing groove allows the junction box to have a high sealing and waterproof effect while also allowing air to be ventilated and discharged from the internal space of the junction box, thereby improving the waterproof and breathable effect of the junction box.

[0026] 2. The photovoltaic junction box with waterproof and breathable function proposed in this utility model is composed of multiple component modules compared with most traditional photovoltaic junction boxes. This makes it easy for users to disassemble and replace the corresponding damaged parts according to the needs of the damage. The breathable membrane can also be replaced by disassembling and replacing the mounting plate, thereby improving the service life and sealing effect of the junction box. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a photovoltaic junction box with waterproof and breathable functions proposed in this utility model;

[0028] Figure 2 This is a schematic diagram of the wiring mechanism of a photovoltaic junction box with waterproof and breathable function proposed in this utility model.

[0029] Figure 3 This is a schematic diagram of the isolation plate structure of a photovoltaic junction box with waterproof and breathable function proposed in this utility model;

[0030] Figure 4 This is a schematic diagram of the upper shell structure of a photovoltaic junction box with waterproof and breathable functions proposed in this utility model.

[0031] Figure 5 This is a cross-sectional view of the bottom shell of a photovoltaic junction box with waterproof and breathable functions proposed in this utility model.

[0032] Legend: 1. Bottom housing; 2. Upper housing; 3. Wiring mechanism; 301. Positioning block; 302. Threaded block; 303. Sealing cap; 304. Connecting groove; 305. Connecting block; 306. Connecting wire; 4. Sealing mechanism; 401. Frame-shaped sealing strip; 402. Arc-shaped sealing strip; 403. Isolation plate; 404. Mounting slot; 405. Fixing slot; 406. Fixing block; 407. Mounting plate; 408. Breathable membrane; 409. Isolation slot; 4010. Frame-shaped sealing groove; 4011. Arc-shaped sealing groove; 5. Lower fixing block; 6. Fixing bolt; 7. Upper fixing block. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] One embodiment of this utility model is provided:

[0035] Reference Figure 1 , 2 4. A photovoltaic junction box with waterproof and breathable function includes a bottom box shell 1, an upper box shell 2 is snapped onto the upper surface of the bottom box shell 1, and wiring mechanisms 3 are provided on both sides of the front end of the bottom box shell 1. The wiring mechanism 3 includes a positioning block 301, a connecting groove 304 is provided in the middle of the outer wall of the front end of the positioning block 301, and a connecting block 305 is snapped onto the inner wall of the connecting groove 304.

[0036] The bottom housing 1 is equipped with a sealing mechanism 4, which includes a frame-shaped sealing strip 401, an arc-shaped sealing strip 402, an isolation plate 403, an isolation slot 409, a frame-shaped sealing groove 4010, and an arc-shaped sealing groove 4011. The upper surface of the isolation plate 403 has mounting slots 404 on both sides. The upper end of the inner wall of the mounting slot 404 has a fixing slot 405. A fixing block 406 is engaged with the inner wall of the fixing slot 405. A mounting plate 407 is fixedly connected to the middle of the lower surface of the fixing block 406. A breathable membrane 408 is fixedly connected to the inner wall of the mounting plate 407. This photovoltaic junction box is composed of multiple component modules, allowing users to easily disassemble and replace damaged components as needed. The breathable membrane 408 can also be replaced by disassembling and replacing the mounting plate 407, thereby improving the service life and sealing effect of the junction box.

[0037] Reference Figure 1 , 2 5. Positioning blocks 301 are fixedly connected to both sides of the front outer wall of the bottom box 1. A connecting line 306 is fixedly connected to the middle of the front outer wall of the connecting block 305, so that external equipment can be connected to the connection conversion component inside the box through the connecting line 306. A threaded block 302 is fixedly connected to the front outer wall of the positioning block 301. A sealing cap 303 is threaded on the outer wall of the threaded block 302, so that the user can rotate the sealing cap 303 to engage with the threaded block 302, thereby sealing and fixing the connecting block 305.

[0038] Reference Figure 2 , 3 4. A frame-shaped sealing strip 401 is fixedly connected to the upper surface of the bottom housing 1. A frame-shaped sealing groove 4010 is formed on the lower surface of the upper housing 2. The frame-shaped sealing strip 401 and the frame-shaped sealing groove 4010 are engaged. Through the engagement between the frame-shaped sealing strip 401 and the frame-shaped sealing groove 4010, the bottom housing 1 and the upper housing 2 can be tightly engaged and fixed together. An arc-shaped sealing strip 402 is fixedly connected to the front end of the upper part of the outer wall of the positioning block 301. Arc-shaped sealing grooves 4011 are respectively formed on both sides of the front end of the lower surface of the upper housing 2. The arc-shaped sealing strip 402 and the arc-shaped sealing groove 4011 engage with each other. Through the engagement between the arc-shaped sealing strip 402 and the arc-shaped sealing groove 4011, the upper shell 2 can be sealed and engaged on the positioning block 301. The isolation plate 403 is fixedly connected to the middle of the bottom surface of the bottom shell 1. The isolation groove 409 is opened in the middle of the top surface of the upper shell 2. The isolation plate 403 and the isolation groove 409 engage with each other. Thus, the isolation plate 403 can form a second isolation layer inside the box by engaging with the isolation groove 409.

[0039] Reference Figure 1 ,2 The bottom box 1 is fixedly connected to the outer walls of all four sides by a lower fixing block 5, and the upper box 2 is fixedly connected to the outer walls of all four sides by an upper fixing block 7. This allows the bottom box 1 and the upper box 2 to be fixedly connected together by bolts through the upper fixing block 7 and the lower fixing block 5. The middle of the upper surface of the lower fixing block 5 is threaded with a fixing bolt 6. By setting the fixing bolt 6, the upper fixing block 7 and the lower fixing block 5 are locked and fixed.

[0040] Working principle: First, the internal connecting parts are installed inside the housing (bottom housing 1 and upper housing 2). The connecting wire 306 is connected to the connecting parts, and the sealing cap 303 is locked so that the connecting block 305 is tightly sealed and engaged with the connecting groove 304. The sealing engagement between the bottom housing 1 and the upper housing 2 on the lid, the sealing engagement between the sealing strip (frame-shaped sealing strip 401 and arc-shaped sealing strip 402) and the sealing groove (frame-shaped sealing groove 4010 and arc-shaped sealing groove 4011), and the sealing engagement between the isolation plate 403 and the isolation groove 409, complete the double-layer seal. The isolation plate 403 and the isolation groove 409 engage in the housing to form a cavity. Moisture and water vapor inside the housing slowly enter the cavity through the breathable membrane 408 (Polypropylene / Polyester microporous series) and are absorbed by the desiccant (alumina desiccant). Water droplets formed by accumulation or seepage are blocked and isolated by the breathable membrane 408. After a period of use, the service life can be extended by disassembling and replacing it.

[0041] The following points should be noted in this article:

[0042] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0043] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A photovoltaic junction box with waterproof and breathable function, comprising a bottom casing (1), characterized in that: The upper surface of the bottom housing (1) is snapped together with the upper housing (2). Wiring mechanisms (3) are provided on both sides of the front end of the bottom housing (1). The wiring mechanism (3) includes a positioning block (301). A connecting groove (304) is opened in the middle of the outer wall of the front end of the positioning block (301). A connecting block (305) is snapped together with the inner wall of the connecting groove (304). The bottom shell (1) is provided with a sealing mechanism (4). The sealing mechanism (4) includes a frame-shaped sealing strip (401), an arc-shaped sealing strip (402), an isolation plate (403), an isolation slot (409), a frame-shaped sealing groove (4010), and an arc-shaped sealing groove (4011). The upper surface of the isolation plate (403) is provided with mounting slots (404) on both sides. The upper end of the inner wall of the mounting slot (404) is provided with a fixing slot (405). The inner wall of the fixing slot (405) is fitted with a fixing block (406). The middle part of the lower surface of the fixing block (406) is fixedly connected to the mounting plate (407). The inner wall of the mounting plate (407) is fixedly connected to a breathable membrane (408).

2. A photovoltaic junction box with waterproof and breathable function according to claim 1, characterized in that: The positioning blocks (301) are fixedly connected to both sides of the front outer wall of the bottom box (1), and the connecting block (305) is fixedly connected to the middle of the front outer wall with a connecting line (306).

3. A photovoltaic junction box with waterproof and breathable function according to claim 1, characterized in that: The outer wall of the front end of the positioning block (301) is fixedly connected to a threaded block (302), and the outer wall of the threaded block (302) is threaded with a sealing cap (303).

4. A photovoltaic junction box with waterproof and breathable function according to claim 1, characterized in that: The frame-shaped sealing strip (401) is fixedly connected to the upper surface of the bottom shell (1), and the frame-shaped sealing groove (4010) is opened on the lower surface of the upper shell (2). The frame-shaped sealing strip (401) and the frame-shaped sealing groove (4010) are engaged.

5. A photovoltaic junction box with waterproof and breathable function according to claim 1, characterized in that: The arc-shaped sealing strip (402) is fixedly connected to the front end of the upper part of the outer wall of the positioning block (301), and the arc-shaped sealing groove (4011) is respectively opened on both sides of the front end of the lower surface of the upper box shell (2). The arc-shaped sealing strip (402) and the arc-shaped sealing groove (4011) are engaged.

6. A photovoltaic junction box with waterproof and breathable function according to claim 1, characterized in that: The isolation plate (403) is fixedly connected to the middle of the bottom surface of the bottom box (1), and the isolation slot (409) is opened in the middle of the top surface of the upper box (2). The isolation plate (403) and the isolation slot (409) are engaged.

7. A photovoltaic junction box with waterproof and breathable function according to claim 1, characterized in that: The bottom box (1) is fixedly connected to the outer walls of all four sides by a lower fixing block (5), and the upper box (2) is fixedly connected to the outer walls of all four sides by an upper fixing block (7).

8. A photovoltaic junction box with waterproof and breathable function according to claim 7, characterized in that: The lower fixing block (5) has a fixing bolt (6) threaded in the middle of its upper surface.

Images