CN203399054U

CN203399054U - Photovoltaic junction system

Info

Publication number: CN203399054U
Application number: CN201320501492.3U
Authority: CN
Inventors: 傅建民; 胡建刚; 龚进; 周华江
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2013-08-16
Filing date: 2013-08-16
Publication date: 2014-01-15
Anticipated expiration: 2023-08-16

Abstract

The utility model relates to a photovoltaic junction system, belonging to the technical field of photovoltaic power generation application. The system comprises a junction box which includes wire inlet ends and wire outlet ends; and the system is characterized by also comprising anti-reverse units, wherein the anti-reverse units are placed outside the junction box and are respectively connected with the wire inlet ends of the junction box, an anti-reverse diode is arranged in each anti-reverse unit, and the anti-reverse diodes are connected with a wire inlet circuit of the junction box. The photovoltaic junction system has the advantage that the temperature rise in the junction box can be effectively reduced, the service life of the junction box is prolonged, and safe use of the photovoltaic junction system can be ensured.

Description

The photovoltaic system of confluxing

Technical field

The utility model belongs to solar energy power generating applied technical field, is specifically related to a kind of photovoltaic system of confluxing.

Background technology

Traditional energy, reducing day by day, becomes increasingly conspicuous to the harm of environment, and regenerative resource is all invested sight by the world during this period, and in regenerative resource, solar energy becomes with its exclusive advantage the focus that people watch attentively.Solar energy power generating, as a kind of clean energy resource mode, has obtained application more and more widely.In photovoltaic generating system, the first step will be carried out connection in series-parallel by solar photovoltaic cell panel exactly, then will in the branch road access header box after connection in series-parallel, conflux.Above-mentioned photovoltaic battery panel is in actual use due to the partial occlusions of building, trees etc., making to be blocked part can not normal power generation, electric current in circuit pours in down a chimney and enters this region, causes the damage of photovoltaic battery panel, therefore the counnter attack diode that prevents reverse direction current flow need be installed in the line.Existing counnter attack diode is all arranged in the inside die cavity of header box, is connected with the input circuit of header box.Above-mentioned mounting means in actual use, because the caloric value of diode itself is larger, is added the heating of other electric elements in header box, causes that the temperature rise of header box exceeds standard, and has potential safety hazard, can affect the useful life of header box simultaneously.

In view of above-mentioned prior art, be necessary the existing photovoltaic system of confluxing to be improved, technical scheme described below produces under such background.

Summary of the invention

The purpose of this utility model is a kind of temperature rise that can effectively reduce header box inside will be provided, increase the service life, guarantee to use the safe photovoltaic system of confluxing.

The purpose of this utility model reaches like this, a kind of photovoltaic system of confluxing, comprise header box, described header box has end of incoming cables and leading-out terminal, it is characterized in that: also comprise counnter attack unit, described counnter attack unit is positioned at outside header box and is connected with the end of incoming cables of described header box, in described inside, counnter attack unit, is provided with counnter attack diode, and described counnter attack diode is connected with the input circuit of described header box.

In a specific embodiment of the present utility model, described counnter attack unit comprises end of incoming cables, counnter attack unit, counnter attack unit leading-out terminal, housing and counnter attack diode, described end of incoming cables, counnter attack unit, counnter attack unit leading-out terminal are arranged on the outside wall body of described housing, and described counnter attack diode is arranged in described housing.

In another specific embodiment of the present utility model, in described housing, be also provided with mounting panel and insulated column, described counnter attack diode is arranged on mounting panel, and described mounting panel is fixed in housing by described insulated column.

The utility model is owing to adopting said structure, the beneficial effect having: can effectively reduce header box inside temperature rise, extend useful life of header box, guarantee the conflux use safety of system of photovoltaic.

Accompanying drawing explanation

Fig. 1 is the conflux schematic diagram of system of photovoltaic of the present utility model.

Fig. 2 is the schematic diagram of header box described in the utility model.

Fig. 3 is a kind of embodiment schematic diagram of counnter attack described in the utility model unit.

Fig. 4 is that the another kind of counnter attack described in the utility model unit is implemented schematic diagram

In figure: 1. header box ,11. end of incoming cables, 12. leading-out terminals; 2. counnter attack unit, 21. ends of incoming cables, counnter attack unit, 22. counnter attack unit leading-out terminals, 23. housings, 24. counnter attack diodes, 25. insulated columns, 26. mounting panels.

Embodiment

In order to make the public can fully understand technical spirit of the present utility model and beneficial effect; applicant will describe in detail embodiment of the present utility model below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, anyly according to the utility model design, changes in the form rather than substance all and should be considered as protection range of the present utility model.

Refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model relates to a kind of photovoltaic system of confluxing, comprise header box 1 and counnter attack unit 2, described header box 1 has end of incoming cables 11 and leading-out terminal 12, described counnter attack unit 2 is positioned at outside header box 1 and is connected with the end of incoming cables 11 of described header box 1, in described 2 inside, counnter attack unit, be provided with counnter attack diode 24, described counnter attack diode 24 is electrically connected to the input circuit of described header box 1.The leading-out terminal 12 of described header box 1 connects higher level's DC cabinet.

Because counnter attack diode 24 is positioned at independently 2 inside, counnter attack unit, counnter attack diode 24 caloric values own can not have influence on the temperature rise of header box 1 inside, and the temperature that has effectively reduced header box 1 inside raises.

The first optimization for above-described embodiment is: described counnter attack unit 2 comprises end of incoming cables, counnter attack unit 21, counnter attack unit leading-out terminal 22, housing 23 and counnter attack diode 24, described end of incoming cables, counnter attack unit 21, counnter attack unit leading-out terminal 22 are arranged on the outside wall body of described housing 23, and described counnter attack diode 24 is arranged in described housing 23.

The second optimization for above-described embodiment is: in described housing 23, be also provided with mounting panel 26 and insulated column 25, described counnter attack diode 24 is arranged on mounting panel 26, and described mounting panel 26 is fixed in housing 23 by described insulated column 25.

Adopt above-mentioned mounting means, can improve counnter attack diode and extraneous insulating properties.

Claims

1. a kind of photovoltaic system of confluxing, comprise header box (1), described header box (1) has end of incoming cables (11) and leading-out terminal (12), it is characterized in that: also comprise counnter attack unit (2), described counnter attack unit (2) is positioned at outside header box (1) and is connected with the end of incoming cables (11) of described header box (1), in described inside, counnter attack unit (2), be provided with counnter attack diode (24), described counnter attack diode (24) is connected with the input circuit of described header box (1).

2. the photovoltaic according to claim 1 system of confluxing, it is characterized in that described counnter attack unit (2) comprises end of incoming cables, counnter attack unit (21), counnter attack unit leading-out terminal (22), housing (23) and counnter attack diode (24), described end of incoming cables, counnter attack unit (21), counnter attack unit leading-out terminal (22) are arranged on the outside wall body of described housing (23), and described counnter attack diode (24) is arranged in described housing (23).

3. the photovoltaic according to claim 2 system of confluxing, it is characterized in that being also provided with mounting panel (26) and insulated column (25) in described housing (23), it is upper that described counnter attack diode (24) is arranged on mounting panel (26), and described mounting panel (26) is fixed in housing (23) by described insulated column (25).