CN202905755U

CN202905755U - Breathing-type photovoltaic junction box for BIPV (building integrated photovoltaics) assembly

Info

Publication number: CN202905755U
Application number: CN2012206025140U
Authority: CN
Inventors: 李立; 常松山; 张林森
Original assignee: NINGXIA YINXIANG ENERGY PHOTOVOLTAIC EQUIPMENT MANUFACTURING Co Ltd
Current assignee: NINGXIA YINXIANG ENERGY PHOTOVOLTAIC EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2013-04-24
Anticipated expiration: 2022-11-15

Abstract

The utility model relates to a breathing-type photovoltaic junction box for a BIPV (building integrated photovoltaics) assembly. The breathing-type photovoltaic junction box for the BIPV (building integrated photovoltaics) assembly comprises a shell (7), and is characterized in that at least one breathing hole is opened on the surface of the shell (7) directly contacted with the outer air; each breathing hole is coated with a breathing film (6) to enable the air to pass freely and prevent liquid from passing through; at least a capillary access hole (4) is opened on the surface of the shell (7) close to the inside of the photovoltaic assembly; each capillary access hole (4) is provided with a capillary; and one end of the capillary extends into the inside of the photovoltaic assembly and the other end extends into the shell, such that pressures of the two can be balanced. By adopting the junction box provided by the utility model, microcirculation can be formed between the BIPV assembly and the inside of the breathing-type photovoltaic junction box, the microcirculation is similar to a microcirculation inside a living body, the hollow layer air pressure in the BIPV assembly can be changed, and the use security in building can be improved.

Description

BIPV photovoltaic module breathing pattern photovoltaic junction box

Technical field

The utility model relates to a kind of BIPV (BIPV) photovoltaic module breathing pattern photovoltaic junction box.

Background technology

At present, in the solar photovoltaic battery component industry, although the equipment and technology level of China lags behind developed country, by introducing crucial production equipment, the technical performance of the photovoltaic module product of industry is keeping national first-class level both at home and abroad.Do not need to improve but this is the explanation product, the BIPV battery component of domestic and foreign current industry just has nothing but two kinds: a kind of is common double wave battery component, and another kind is hollow photovoltaic component.

Common double wave battery component is also referred to as first generation BIPV battery component, and it is to replace photovoltaic module back-protective material and adopt glued membrane to encapsulate with toughened glass.The unquestionable technology barriers of having broken photovoltaic industry and building trade of this BIPV battery component, but also exist the drawback that many direct restriction BIPV battery components develop.At first be heat-insulating capability: the transmission of energy has nothing but three kinds of radiant transfer, convection current is transmitted and conduction is transmitted, in the BIPV component application during in building, can directly import interior of building into by the conduction effect of glass by the heat of illumination generation and the heat of battery component generating generation, the power consumption of the building that this just increases greatly, and reduced the generating efficiency (generating efficiency of battery component raises with surface temperature and reduces) of battery component, and the soundproof effect of glass is non-constant, directly uses first generation BIPV battery component also need add the use sound insulation at building, heat-proof device and sealing.

Hollow photovoltaic component is also referred to as second generation BIPV battery component, this novel battery assembly is that common batteries assembly and toughened glass or simple glass are being carried out hollow, adds in hollow layer that then inert gas seals and add a certain amount of drier in hollow layer.Such design success battery component has been incorporated in the construction material also reached the specification requirements such as heat insulation, the sound insulation of construction material and fire prevention.The high-performance hollow photovoltaic module because the special metal film of one deck is arranged, can reach the 0.22-0.49 sheltering coefficient, makes room conditioning (cold air) load reduction.Thermal transmission coefficient 1.4-2.8W (m2.K).To alleviating the room heater load, the very large efficient of same performance.Therefore, window is opened greatlyr, and energy-saving effect is more obvious.

The high-performance hollow photovoltaic module can be tackled by the sun and be mapped to indoor suitable energy, thereby can prevent the discomfort that causes because of radiant heat and alleviate dizzy that evening glow sunlight causes.The high-performance hollow photovoltaic module has multicolour, can select as required color, to reach more preferably artistic effect.Be applicable to the communal facility such as office block, showroom, library and require the wet special building in constant temperature the Huanshui River as computer floor, precision instrument workshop, chemical plant etc.Also can be used for the dizzy place of sun-proof and anti-evening glow in addition.But because the glass outer of hollow photovoltaic component is to be made of photovoltaic module, photovoltaic module can produce a large amount of heat in power generation process, these heat are owing to the hollow layer of hollow photovoltaic component can't be discharged from, the accumulation of heat can cause the hollow layer gas expansion, and then can cause breaking of hollow photovoltaic component, and because excess Temperature can directly affect the generating efficiency of photovoltaic cell.So so that hollow photovoltaic component is utilizing and is using and quite disputed on.

The utility model content

The purpose of this utility model provides a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box, can make the BIPV photovoltaic module not only have higher heat-insulation and heat-preservation effect, and has avoided the unstable glass breaking problem that causes of double glazing air pressure.

A kind of BIPV photovoltaic module breathing pattern photovoltaic junction box, comprise housing, its special feature is: have at least one spiracle with surface that outside atmosphere directly contacts on described housing, make air free pass through to stop liquid to pass through thereby all be coated with respiratory membrane on each spiracle; Surface near photovoltaic module inside on described housing has at least one capillary access hole, at each capillary access Kong Shangjun capillary is installed, it is inner and its other end stretches in the described housing that this end capillaceous stretches into photovoltaic module, thus both pressure of balance.

Its middle shell adopts the MPPO plastic material.

Wherein respiratory membrane adopts the expanded PTFE material.

Wherein hermetic seal between capillary access hole and the capillary.

Wherein between capillary access hole and the capillary sealing ring is installed, and is coated with fluid sealant.

Its middle shell is with loam cake, and hermetic seal between housing and the loam cake.

The plug-in type protective cover wherein is installed in housing, and passes through the fluid sealant hermetic seal between housing and the loam cake.

The first flow deflector, bypass diode, the second flow deflector that connect successively wherein are installed in housing, one end of this bypass diode is electrically connected with the first flow deflector and its other end is electrically connected with the second flow deflector, this second flow deflector also is electrically connected with connecting line, stretch out outside the housing in the connecting line access hole of this connecting line from housing, at the end of this connecting line connector is installed.

Wherein connecting line adopts double-insulated cable.

Breathing pattern photovoltaic junction box of the present utility model has the performances such as good electrical insulation capability, water resistance, dimensional stability, shock resistance, intensity be high, corrosion-resistant, high temperature resistant, satisfies the requirement in useful life in 30 years of BIPV photovoltaic module fully.The installation of this breathing pattern photovoltaic junction box meets international photovoltaic standard criterion, and suitable with installation time spent of common terminal box.Its installment work can be undertaken by the conventional mounting workman, and its connection that circuit is installed meets related specifications, can not cause owing to the difference of terminal box, electric wire and fail safe complicated.After adopting the utility model, the inner formation of BIPV photovoltaic module and breathing pattern photovoltaic junction box microcirculation, microcirculation principle in the similar organism can change BIPV photovoltaic module hollow layer air pressure, promotes the fail safe of BIPV photovoltaic module in building utilization.

Description of drawings

Accompanying drawing 1 is structural representation of the present utility model;

Accompanying drawing 2 is the schematic diagram of the utility model middle shell.

Embodiment

As shown in Figure 1, the utility model is a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box, comprise housing 7, on described housing 7, have at least one spiracle with surface that outside atmosphere directly contacts, make air free pass through to stop liquid to pass through thereby on each spiracle, all be coated with respiratory membrane 6; Surface near photovoltaic module inside on described housing 7 has at least one capillary access hole 4, on each capillary access hole 4, capillary is installed all, it is inner and its other end stretches in the described housing 7 that this end capillaceous stretches into photovoltaic module, thus both pressure of balance.

Its middle shell 7 adopts the MPPO plastic material, and respiratory membrane 6 adopts the expanded PTFE material.In addition hermetic seal between capillary access hole 4 and the capillary is equipped with sealing ring between capillary access hole 4 and the capillary, and is coated with fluid sealant.

As shown in Figure 2, its middle shell 7 is with loam cake 9, and hermetic seal between housing 7 and the loam cake 9.The plug-in type protective cover is installed in housing 7, and passes through the fluid sealant hermetic seal between housing 7 and the loam cake 9.

The first flow deflector 2, bypass diode 1, the second flow deflector that connect successively wherein are installed in housing 7, one end of this bypass diode 1 is electrically connected with the first flow deflector 2 and its other end is electrically connected with the second flow deflector, this second flow deflector also is electrically connected with connecting line 3, stretch out outside the housing 7 in the connecting line access hole 5 of this connecting line 3 from housing 7, at the end of this connecting line 3 connector 8 is installed.Connecting line 3 adopts double-insulated cable in addition.

Operation principle of the present utility model and using method are as follows:

The connecting line 3 of breathing pattern photovoltaic junction box (abbreviation terminal box) is drawn from the terminal box front, guarantee the consistency with BIPV photovoltaic module outward appearance.Adopt capillary that the glass hollow layer is connected with terminal box of the present utility model, make terminal box and glass hollow layer form microcirculation, then terminal box is connected again with in the building, BIPV photovoltaic module hollow layer and interior of building are coupled together and double-deck isolation are arranged, accomplish balance glass hollow layer air pressure and also do not occur heat to flow phenomenon.Such design has solved the BIPV photovoltaic module and has made the phenomenon of glass hollow layer air pressure too high generation glass breaking in summer in the power generation process, and the convection current that microcirculation can forming energy.So that the BIPV photovoltaic module not only has higher heat-insulation and heat-preservation effect, can also effectively solve the relatively poor problem of heat insulation and preservation effect that produces in BIPV (BIPV) process of construction, and solve the unstable glass breaking problem that causes of double glazing air pressure.

Real-time example 1:

The utility model is attached most importance to satisfy BIPV photovoltaic module performance requirement, take MPPO as material of main part, strengthens the microcirculation ability of BIPV photovoltaic module to open capillary access hole 4 and spiracle at the terminal box mould, and its concrete ins and outs are as follows:

(1) breathing pattern photovoltaic junction box housing 7 design of materials:

Housing 7 adopts the material modified MPPO of PPO, this material be by PPO (polyphenylene oxide), HIPS (impact resistant polystyrene) and ABS (acrylonitrile-butadiene-styrene copolymer) blend make material modified, this material has PPO material outstanding electrical insulating property, water resistance and dimensional stability, also have the HIPS material good shock resistance, the performance such as the intensity that has more the ABS material standby is high, corrosion-resistant, high temperature resistant.Material of main part has guaranteed useful life, electrical insulating property, the weatherability of breathing pattern photovoltaic junction box like this, has more improved the security performance that the BIPV photovoltaic module uses.

(2) breathing pattern photovoltaic junction box structural design:

This breathing pattern photovoltaic junction box adopts MPPO as housing 7 materials, makes the housing 7 of long 100mm, wide 10mm, high 16mm; Over on two faces of these housing 7 minor faces, be the 1.5mm circular hole directly, be made into capillary access hole 4; The circular hole that to open 1 external diameter in front, this housing 7 long limit be 5mm is made respiratory membrane 6; Such design makes terminal box can form two-layer protection, and can promote the functions such as microcirculatory row pressure.When BIPV photovoltaic module inner hollow layer because the rising of temperature causes air pressure much, by microcirculqtory system unnecessary air pressure is drained in capillary and the terminal box, become malleation by breathing pattern terminal box internal pressure by negative pressure, by spiracle pressure is drained into interior of building.Because the decline of temperature causes air pressure excessively low, it is inner by the breathing pattern photovoltaic junction box interior of building to be sucked the BIPV photovoltaic module when BIPV photovoltaic module inner hollow layer.The respiratory membrane 6 of breathing pattern hollow photovoltaic component terminal box inside can stop the particulate more than 0.1 micron and can effectively reduce entering of exclusion of water molecule.

(3) capillary access hole 4 designs:

Capillary access hole 4 is to make the circular hole that external diameter is 1.5mm in the utility model, and inner in the access hole to use rubber ring to carry out embedded, thus guarantee after the capillary access with access hole inwall between tight.Access afterwards and use structure glue that capillary and access hole are sealed at capillary.

(4) respiratory membrane 6 designs:

Respiratory membrane 6 of the present utility model is to leave external diameter 5mm circular hole in front, the long limit of breathing pattern photovoltaic junction box, adopt a kind of novel waterproof ventilative material ePTFE fine powder resin (expanded PTFE) to make, with polytetrafluoroethylene through expanded stretching, obtain 3 D stereo network structure even, identical hole, this network structure forms the micropore of 0.1-1.0 micron, the aperture is less than 10000 times of the globules, greater than 700 times of water vapour molecules, both can supply obstruction reliably and with long-term to water, wet goods liquid carrying, air is easily passed through.Simultaneously, the net vertical body structure that micro channel is formed in film makes dust run into obstruct, reaches effective dust-proof effect, and minimum can capture 0.1 micron particle.

Claims

1. BIPV photovoltaic module breathing pattern photovoltaic junction box, comprise housing (7), it is characterized in that: surface upper at described housing (7) and that outside atmosphere directly contacts has at least one spiracle, on each spiracle, all be coated with respiratory membrane (6) thus make air free pass through to stop liquid to pass through; Have at least one capillary access hole (4) on the upper surface near photovoltaic module inside of described housing (7), on each capillary access hole (4), capillary is installed all, it is inner and its other end stretches in the described housing (7) that this end capillaceous stretches into photovoltaic module, thus both pressure of balance.

2. a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box as claimed in claim 1 is characterized in that: its middle shell (7) employing MPPO plastic material.

3. a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box as claimed in claim 1 is characterized in that: wherein respiratory membrane (6) adopts the expanded PTFE material.

4. a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box as claimed in claim 1 is characterized in that: wherein hermetic seal between capillary access hole (4) and the capillary.

5. a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box as claimed in claim 4 is characterized in that: wherein between capillary access hole (4) and the capillary sealing ring is installed, and is coated with fluid sealant.

6. a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box as claimed in claim 1, it is characterized in that: its middle shell (7) is with loam cake (9), and hermetic seal between housing (7) and the loam cake (9).

7. a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box as claimed in claim 6 is characterized in that: wherein in housing (7) the plug-in type protective cover is installed, and passes through the fluid sealant hermetic seal between housing (7) and the loam cake (9).

8. a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box as claimed in claim 1, it is characterized in that: the first flow deflector (2) that connects successively wherein is installed in housing (7), bypass diode (1), the second flow deflector, one end of this bypass diode (1) is electrically connected with the first flow deflector (2) and its other end is electrically connected with the second flow deflector, this second flow deflector also is electrically connected with connecting line (3), stretch out outside the housing (7) in the connecting line access hole (5) of this connecting line (3) from housing (7), at the end of this connecting line (3) connector (8) is installed.

9. a kind of BIPV photovoltaic module breathing pattern photovoltaic junction box as claimed in claim 8 is characterized in that: wherein connecting line (3) adopts double-insulated cable.