CN111917372A - Direct current collection flow box - Google Patents

Abstract

The invention discloses a direct current combiner box, comprising a box body, a switch part is arranged in the box body, and the switch part has a terminal; an accommodating part, the accommodating part is arranged at the outer wall of the box body , a live display is installed on the wall of the accommodating part; a conductor, one end of the conductor is connected to the terminal of the switch part, and the other end of the conductor penetrates the thickness of the box wall and extends into the accommodating part; wherein, The accommodating piece is detachably mounted on the outer wall of the box body, and the joint between the accommodating piece and the box body is filled with sealant. By installing the accommodating piece on the outer wall of the box body, the present invention achieves the operation requirement that the wiring can be directly connected outside the box body, and greatly improves the convenience of use. The operator can see at a glance whether the box is live or not when carrying out the operation, which improves the safety and efficiency of the operation.

Description

A DC combiner box

technical field

The invention relates to the field of photovoltaic technology, in particular to a DC combiner box.

Background technique

With the support of the state for photovoltaic new energy, photovoltaic new energy products have achieved rapid development in recent years, and the photovoltaic DC combiner boxes supporting them have also been widely used, and the number of enterprises producing photovoltaic combiner boxes is also increasing. The combiner box is used in the electrical equipment of the photovoltaic power generation system. It is mainly responsible for the direct current produced by the photovoltaic module and then transmitted to the photovoltaic inverter after being combined. As a connecting device in the photovoltaic system, the photovoltaic combiner box becomes more and more important.

With more and more applications of photovoltaic DC combiner boxes, and the size of combiner boxes is getting smaller and smaller, during field installation, due to the large current when the output cable is connected, the cable is generally thicker and the bending radius is also large. , the wiring is very inconvenient. All of these will have a great impact on the long-term stable operation of the combiner box, the daily maintenance of operation and maintenance personnel, and the after-sales maintenance of the combiner box manufacturer, increasing more labor costs and material costs.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a DC combiner box to solve the above-mentioned problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a DC combiner box, including a box body, the box body is provided with a switch member, and the switch member has a terminal; an accommodating member, the accommodating member is provided with At the outer wall of the box body, a live display is installed on the wall of the accommodating piece; a conductor, one end of the conductor is connected to the terminal of the switch piece, and the other end of the conductor penetrates the thickness of the box body wall and extends into the accommodating piece; wherein, the accommodating piece is detachably mounted on the outer wall of the box body, and the joint between the accommodating piece and the box body is filled with sealant.

The conductors are two copper bars, and the ends of the copper bars are introduced into the accommodating member and arranged.

The accommodating member has an accommodating cavity, and the end of the copper bar is introduced into the center of the accommodating cavity.

The accommodating part is formed at the joint of the outer wall of the box body with a connecting part that extends outward and fits the wall of the box body, and a plurality of the connecting parts are arranged on the accommodating part, The placement piece is detachably connected to the box body through the connecting portion.

The accommodating part is arranged to cover the conductor.

The accommodating part is arranged on one side of the bottom of the box body.

The accommodating part has an opening and closing part, the opening and closing part is hinged on the accommodating part, and the accommodating part controls the communication between the accommodating cavity and the external space through the opening and closing of the opening and closing part.

It can be seen from the above technical solutions that the present invention installs the accommodating member at the outer wall of the box body, and optimizes the conductor connecting the switch member, so that the end of the conductor is introduced into the accommodating member, so as to achieve the possibility of being outside the box body. The operation requirements of direct wiring greatly improve the convenience of use. At the same time, a live display is also installed on the accommodating part, so that the operator can see at a glance whether the box is live or not when carrying out the operation, which improves the safety of operation. performance and efficiency.

Description of drawings

Fig. 1 is the internal structure schematic diagram of the present invention;

Fig. 2 is a partial enlarged view of the present invention.

In the figure: 1 box body, 2 switch parts, 3 conductors, 4 housing parts, 41 opening and closing parts, 42 live display, 43 holding parts, 44 connecting parts, 441 locking parts, 5 sealants.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings:

A DC combiner box as shown in Figures 1-2 includes a box body 1, a accommodating member 4 and a conductor 3. The box body 1 is provided with a switch member 2, and the switch member 2 is the control member. The main switch of all circuits inside the box 1, in general, the switch element 2 used in the traditional box 1 is connected to the external cable through a short cable at the terminal. This operation mode makes the specific implementation process It is necessary to open the door of the box 1 first, and connect the end of the cable to the inside of the box 1. Due to the limited space area inside the box 1, there are many inconveniences in the connection process. In this embodiment, an accommodating member 4 is independently arranged on the outer wall of the box body 1, so that it has an operation space for connecting external cables independently. The display 42, which is connected to the circuit inside the box body 1, is used to detect whether the inside of the box body 1 is in a charged state, so as to achieve an effective prompting function. It should be pointed out here that, generally, the box body 1 is installed vertically from the perspective of FIG. 1 , the terminals of the switch member 2 are located below, and two vertical cables are connected to the two terminals. The provided conductor 3; in practice, the conductor 3 is used for conducting electricity, and it is not limited whether it is replaced by wires or copper bars. 4, here, the accommodating member 4 provides an operable space at the end of the conductor 3, and provides an operator to perform the wiring connection operation of the cable and the end of the conductor 3 in the operation space. Wherein, the accommodating member 4 is detachably installed on the outer wall of the box body 1, and the joint between the accommodating member 4 and the box body 1 is filled with sealant 5, and the gap is adjusted by using the sealant 5. The filling at the place can effectively ensure the airtightness in the accommodating part 4, so as to improve the waterproof effect.

The conductor 3 uses two copper bars. In general, in order to improve the performance of use and consider the cost of use, the conductor 3 can use T2 copper bars, and its conductivity can reach more than 98%. The ends of the copper bars are introduced into the accommodating member 4 to be arranged. Further, the accommodating member 4 has an accommodating cavity, and the end of the copper bar is introduced into the center of the accommodating cavity. Here, those skilled in the art can understand that, in order to improve the The high-efficiency connection between the conductor 3 and the external cable, the end of the conductor 3 has a structure extending into the accommodating cavity, and at least half of the remaining space is reserved for the connection of the wiring cable. The size of the accommodating member 4 depends on the size of the box body 1 and the size of the occupied area of the conductor 3, and is adapted to it, so as to effectively achieve the function of facilitating the connection of external cables.

In this embodiment, the accommodating member 4 is formed with a connecting portion 44 at the joint of the outer wall of the box body 1 that extends outward and fits the wall of the box body 1 , which can be understood as the connecting portion 44 . It is a bent L-shaped structure, which can be welded to one side of the accommodating member 4 in practice, and is detachably connected to the box body 1 through the locking member 441 during the assembly process. The locking member 441 is a bolt, but this embodiment is not limited to this; after installation, in order to ensure good sealing between the accommodating member 4 and the box 1, and prevent the combiner box from being damaged by outdoor rainwater There are problems such as short circuit at the conductor 3 caused by isopenetration. Therefore, waterproofing is implemented by filling the seam with sealant 5. Here, the specific material of the sealant 5 is not limited, and a waterproof sealant is generally used.

Please refer back to the view in FIG. 1 , in general, the combiner box used is in the vertical position from the perspective of FIG. 1 . In order not to interfere with the normal opening and closing of the door panel of the box body 1 , the accommodating member 4 needs to be arranged in the On the path that does not overlap with the opening and closing path of the door panel of the box body 1, at the same time, in consideration of the erosion of rainwater after outdoor installation, in this embodiment, the accommodating member 4 is arranged at the bottom of the box body 1. side, so that the box body 1 has the function of protecting the accommodating member 4, and at the same time, the installed electrified display 42 can be installed in the front position in the perspective of FIG. 1 for easy reading. The accommodating part 4 also has an opening and closing part 41 , the opening and closing part 41 is hinged on the accommodating part 4 , and the accommodating part 4 controls the accommodating part by the opening and closing of the opening and closing part 41 . Communication of the cavity with the external space. Here, it should be pointed out that the adopted opening and closing member 41 is a plate structure integrally installed with the accommodating member 4, and its main function is to close the accommodating member 4. In order to facilitate the opening and closing, the opening and closing member 41 is also A handle is provided to facilitate the operator to perform opening and closing actions. Since the end of the conductor 3 is connected to the external cable, in the process of closing the opening and closing member 41, in order to prevent it from interfering with the structure of the cable, a power supply can be provided on the board surface of the opening and closing member 41. The larger through hole through which the cable passes, that is, the cable passes through the through hole and then implements the connection with the conductor 3, which can effectively prevent the problem of structural interference.

The above-mentioned embodiments merely describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can make various modifications to the technical solutions of the present invention. Variations and improvements should fall within the protection scope determined by the claims of the present invention.

Claims (7)

1. A dc combiner box, comprising:

the switch device comprises a box body, a switch component and a control circuit, wherein the box body is internally provided with the switch component which is provided with a wiring end;

the accommodating piece is arranged on the outer wall of the box body, and a live display is installed on the wall of the accommodating piece;

one end of the conductor is connected to the wiring end of the switch piece, and the other end of the conductor penetrates through the thickness of the wall of the box body and extends into the accommodating piece;

the containing piece is detachably mounted on the outer wall of the box body, and sealant is filled at the joint of the containing piece and the box body.

2. A dc combiner box as defined in claim 1, wherein: the conductor is two copper bars, and the end of the copper bar is led into the accommodating piece.

3. A dc combiner box as defined in claim 2, wherein: the accommodating piece is internally provided with an accommodating cavity, and the end part of the copper bar is led into the central part of the accommodating cavity.

4. A dc combiner box as defined in claim 1, wherein: the containing piece is provided with a plurality of connecting parts at the joint of the outer wall of the box body, wherein the connecting parts extend outwards and are attached to the wall of the box body, and the containing piece is detachably connected with the box body through the connecting parts.

5. A dc combiner box as defined in claim 1, wherein: the accommodating piece is arranged in a mode of coating the conductor.

6. A dc combiner box as defined in claim 1, wherein: the accommodating piece is arranged on one side of the bottom of the box body.

7. A dc combiner box as claimed in claim 3, wherein: the accommodating part is provided with an opening and closing part, the opening and closing part is hinged to the accommodating part, and the accommodating part controls the communication between the accommodating cavity and the external space through the opening and closing of the opening and closing part.

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