CN214045561U

CN214045561U - Photovoltaic combiner box

Info

Publication number: CN214045561U
Application number: CN202022555261.3U
Authority: CN
Inventors: 张君成
Original assignee: Jiangmen Yuntian New Energy Investment Services Ltd
Current assignee: Jiangmen Yuntian New Energy Investment Services Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-08-24
Anticipated expiration: 2030-11-06

Abstract

The utility model provides a photovoltaic conflux case, including support, baffle and box. The support comprises a support seat and a bearing strip, one end of the support seat is fixed on the ground or a building, and the other end of the support seat is connected with the bearing strip; one side of the baffle is connected with the bearing strip, and the side of the baffle connected with the bearing strip is provided with a cantilever; the box is connected with the cantilever, and the box is including holding cabinet, heat dissipation cabinet, baffle and cabinet door, and the baffle sets up in holding the cabinet and with the interior wall connection who holds the cabinet, and the baffle forms the wind channel with the inner wall that holds the cabinet, and the heat dissipation cabinet is provided with supply-air outlet and air intake, and the heat dissipation cabinet passes through supply-air outlet and wind channel intercommunication, holds and is provided with the air outlet with the wind channel intercommunication on the lateral wall of cabinet, and the cabinet door is articulated with the lateral wall that holds the cabinet, and one side that the baffle is close to the cabinet door is provided with the sealing strip. The baffle and the chamber that holds the cabinet component mutually independent wind channel and hold, wherein the wind channel is used for the heat dissipation, holds the chamber and is used for depositing distribution equipment, holds chamber and wind channel mutual isolation.

Description

Photovoltaic combiner box

Technical Field

The utility model relates to a photovoltaic power equipment field, in particular to photovoltaic conflux case.

Background

The dependence of photovoltaic power generation on sunlight is large, so that the solar photovoltaic panels need to be distributed in places where no obstacles block the sunlight. For the convenience of transportation, the solar photovoltaic panel is generally separated into a plurality of sub-units, and the sub-units of the solar photovoltaic panel are spliced and assembled at an installation site. On the other hand, the electric energy generated by the solar photovoltaic panel is direct current, and the household electrical appliance or industrial production equipment generally uses a mains supply, i.e. alternating current, as a power supply, so that when the solar energy is used for supplying power to the household electrical appliance or industrial production equipment, the direct current generated by the solar photovoltaic panel needs to be converted into alternating current through an inverter and connected to a household or industrial mains supply power grid. However, since the solar photovoltaic panel has the characteristics of unit modularization and distributed distribution, if one inverter is provided for each small area of the solar photovoltaic panel, the equipment cost and the maintenance cost of photovoltaic power generation are high, which is not favorable for the popularization of photovoltaic power generation. In the prior art, a certain number of solar photovoltaic panels with the same specification are generally connected in series to form a solar photovoltaic panel string, and then the solar photovoltaic panel string is connected in parallel to a photovoltaic combiner box, is converged by the photovoltaic combiner box and then is output to a photovoltaic inverter, and is converted into alternating voltage by the photovoltaic inverter and then is connected with commercial power in a grid mode.

Because the collection flow box plays the effect of assembling to the electric energy of solar photovoltaic board output, therefore, the collection flow box generally is close to in the setting of solar photovoltaic board, the collection flow box receives solar insolation easily, and lead to the temperature in the box to rise, thereby current collection flow box generally promotes the gas flow in the box through set up the louvre and the electric fan that ventilate on the collection flow box and reaches certain cooling effect, but steam enters into in the box through the louvre easily, cause the corruption to the distribution equipment in the box, still have the risk of soaking distribution equipment and electric leakage when meeting strong precipitation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a photovoltaic conflux case prevents that distribution equipment in the box from being corroded by steam, reduces the distribution equipment of box and is soaked the risk of electric leakage.

According to the utility model discloses photovoltaic conflux case, include:

the support comprises a support seat and a bearing strip, one end of the support seat is used for being fixed on the ground or a building, and the other end of the support seat is connected with the bearing strip;

one side of the baffle is connected with the bearing strip, and a cantilever is arranged on the side of the baffle connected with the bearing strip;

the box, with the cantilever is connected, the box is including holding cabinet, heat dissipation cabinet, baffle and cabinet door, the baffle set up in hold in the cabinet and with the interior wall connection who holds the cabinet, the baffle with the inner wall that holds the cabinet forms the wind channel, the heat dissipation cabinet is provided with supply-air outlet and air intake, the heat dissipation cabinet passes through the supply-air outlet with the wind channel intercommunication, hold be provided with on the lateral wall of cabinet with the air outlet of wind channel intercommunication, the cabinet door with the lateral wall that holds the cabinet is articulated, the baffle is close to one side of cabinet door is provided with the sealing strip.

According to the utility model discloses photovoltaic conflux case has following beneficial effect at least:

the photovoltaic combiner box is provided with the support and the baffle, the box body is hung on one surface of the baffle close to the support through the cantilever, the baffle plays a role of shielding sunlight and rainwater for the box body, the temperature rise of the box body caused by direct sunlight can be prevented, and the box body is prevented from being wetted by rainwater; the box body is arranged far away from the ground, so that the temperature of the ground is favorably prevented from being conducted to the box body; the partition board and the accommodating cabinet form an air duct and an accommodating cavity which are mutually independent, wherein the air duct is used for heat dissipation, the accommodating cavity is used for storing power distribution equipment, air enters the heat dissipation cabinet from an air inlet of the heat dissipation cabinet and enters the air duct from an air supply outlet, and the air is discharged from an air outlet after passing through the air duct, so that the heat dissipated by the accommodating cavity can be taken away, and the effect of cooling is achieved; hold chamber and wind channel mutual isolation, when can preventing that the air from getting into the box inside, the steam that carries in the air causes the corruption to the distribution equipment who holds the intracavity, also can avoid the rainwater to enter into the box inside and soak the distribution equipment who places in holding the cabinet from air intake or air outlet simultaneously, effectively reduces the risk of electric leakage.

According to some embodiments of the utility model, photovoltaic combiner box still includes cooling fan, automatically controlled board and internal power source, cooling fan with automatically controlled board set up in the heat dissipation cabinet, internal power source set up in hold in the cabinet, automatically controlled board with cooling fan with the internal power source electricity is connected, cooling fan is used for making the gaseous flow direction in the heat dissipation cabinet in the wind channel.

According to some embodiments of the utility model, the photovoltaic combiner box still includes temperature sensor, temperature sensor set up in hold in the cabinet, temperature sensor with internal power source with automatically controlled board electricity is connected.

According to some embodiments of the utility model, be provided with first sealed binding post on the baffle, it passes through to hold the cabinet first sealed binding post with the supply-air outlet with the heat dissipation cabinet intercommunication.

According to some embodiments of the utility model, the bottom of holding the cabinet is provided with the sealed binding post of a plurality of second, the inside of holding the cabinet passes through the sealed binding post of second with the outside intercommunication that holds the cabinet.

According to some embodiments of the utility model, the photovoltaic combiner box is still including preventing diode, anodal input fuse, negative pole input fuse, anodal busbar and negative pole busbar, anodal input fuse prevent diode the anodal busbar the internal power source the negative pole busbar with negative pole input fuse electricity in proper order connects, anodal input fuse is used for connecting the positive pole of photovoltaic board, negative pole input fuse is used for connecting the negative pole of photovoltaic board.

According to some embodiments of the utility model, the outer wall of heat dissipation cabinet is provided with first guard shield, first guard shield cover in the air intake, first guard shield is kept away from the one end of air intake is provided with first dust screen.

According to some embodiments of the utility model, the outer wall that holds the cabinet is provided with the second guard shield, the second guard shield cover in the air outlet, the second guard shield is kept away from the one end of air outlet is provided with the second dust screen.

According to some embodiments of the utility model, the supporting seat includes first support bar, second support bar and connecting strip, the length of first support bar is less than the second support bar, the one end of first support bar is provided with first connecting plate, be provided with first connecting hole on the first connecting plate, first support bar is kept away from the one end of first connecting plate with the support strip is connected, the one end of second support bar is provided with the second connecting plate, be provided with the second connecting hole on the second connecting plate, the second support bar is kept away from the one end of second connecting plate with the support strip is connected, the connecting strip with first support bar with the second support bar is connected.

According to the utility model discloses a some embodiments, the quantity of cantilever is two just be provided with the edge on the cantilever the first fixed orifices that the cantilever axial distributes, the outer wall of box is provided with the fixed plate, be provided with the second fixed orifices on the fixed plate, the box passes through the fixed plate with the cantilever is connected.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an overall schematic view of a photovoltaic combiner box according to an embodiment of the present invention;

fig. 2 is a schematic view of the inside of a box body of a photovoltaic combiner box according to another embodiment of the present invention;

fig. 3 is a schematic view of the inside of the box body of the photovoltaic combiner box according to another embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The utility model discloses a photovoltaic conflux case is described in detail below in combination with the drawing.

Referring to fig. 1 and 2, an embodiment of the present invention provides a photovoltaic combiner box, including a bracket 100, a baffle 200, a box 300, and a cantilever 400. The bracket 100 comprises a support base 110 and a supporting strip 120, wherein the support base 110 comprises two first support strips 111 which are parallel to each other, two second support strips 112 which are parallel to each other, two first connecting strips 118 and two second connecting strips 119, and the length of the first support strips 111 is smaller than that of the second support strips 112. One end of the first supporting strip 111 is provided with a first connecting plate 114, the first connecting plate 114 is provided with a first connecting hole 115, one end of the first supporting strip 111, which is far away from the first connecting plate 114, is connected with the supporting strip 120 in a welding mode, and the first supporting strip 111 is fixed on the ground or the top surface of a building through the first connecting hole 115 and a bolt penetrating through the first connecting hole 115. One end of the second supporting strip 112 is provided with a second connecting plate 116, the second connecting plate 116 is provided with a second connecting hole 117, one end of the second supporting strip 112, which is far away from the second connecting plate 116, is connected with the supporting strip 120 in a welding manner, and the second supporting strip 112 is fixed on the ground or the top surface of a building through the second connecting hole 117 and a bolt penetrating through the second connecting hole 117. A pair of support bars 120 are formed at an angle of 45 ° with the ground or the top surface of the building by the first and

second support bars

111 and 112, respectively, and are arranged in parallel with each other. First connecting strips 118 are arranged between the first supporting strips 111 and the second supporting strips 112, second connecting strips 119 are arranged between the two first supporting strips 111 and between the two second supporting strips 112, two ends of the first connecting strips 118 and two ends of the second connecting strips 119 are welded on the first supporting strips 111 or the second supporting strips 112 in a welding mode respectively, and the first connecting strips 118 and the second connecting strips 119 are parallel to the ground or the top surface of a building respectively. The supporting strip 120 is provided with a first through hole 121, the baffle 200 is provided with a second through hole 210, the baffle 200 is arranged on one side of the supporting strip 120 far away from the supporting seat 110, and the baffle 200 is fixedly connected with the supporting strip 120 through a nut and a bolt penetrating through the first through hole 121 and the second through hole 210. One side of the baffle 200 facing the bearing strip 120 is provided with a pair of cantilevers 400 parallel to each other, one end of each cantilever 400 is connected with the baffle 200 in a welding manner, the other end of each cantilever 400 is suspended, and the cantilevers 400 are provided with first fixing holes 410 which are uniformly distributed along the axial direction of the cantilevers 400. Be provided with two fixed plates 500 that correspond with cantilever 400 on the outer wall of the one side of keeping away from cabinet door 340 at box 300, the one end of fixed plate 500 is through the welded mode and the outer wall connection of box 300, the other end of fixed plate 500 is provided with second fixed orifices 510, can be with first fixed orifices 410 and second fixed orifices 510 fixed connection through bolt and screw, thereby make box 300 hang on cantilever 200, through connecting the first fixed orifices 410 of different positions, can adjust the distance between box 300 and ground or the building top surface, make this embodiment can be applicable to different installation environment. The photovoltaic conflux case of this embodiment passes through baffle 200 and support 100 to be fixed on ground or building top surface, baffle 200 inclines to ground or building top surface setting, box 300 hangs in the one side that baffle 200 is close to support 100, baffle 200 can play the effect of sheltering from sun and rainwater, not only can prevent that box 300 from receiving the direct sunlight, avoid the box high temperature, can prevent the top ponding of box 300 simultaneously, liquid can dredge subaerially through the surface of baffle 200, and box 300 parts with ground, thereby can reduce the inside risk of intaking of box 300. In addition, the separation of the box 300 from the ground can prevent heat from the ground from being transferred to the box 300, which is beneficial to air passing through the surface of the box 300 and helps heat dissipation.

Box 300 is including holding cabinet 310, heat dissipation cabinet 320, baffle 330 and cabinet door 340, baffle 330 sets up in the inside that holds cabinet 310, one side of baffle 330 with the interior wall connection who holds cabinet 310, the one side of baffle 330 constitutes wind channel 350 with the inner wall that holds cabinet 310, cabinet door 340 is articulated with the lateral wall that holds cabinet 310, one side that baffle 330 is close to cabinet door 340 is provided with sealing strip 360, when cabinet door 340 is closed, sealing strip 360 contradicts with cabinet door 340, sealing strip 360 can prevent that gas from leaking to the outer cabinet 310 that holds of wind channel 350 in from the clearance between cabinet door 340 and the baffle 330, the outer cabinet 310 that holds of wind channel 350 constitutes the chamber 370 that holds that is used for depositing distribution equipment, sealing strip 360 can improve the waterproof performance who holds chamber 370. The heat dissipation cabinet 320 is provided with an air supply outlet 321 and an air inlet 322, and the heat dissipation cabinet 320 is communicated with the air duct 350 through the air supply outlet 321; an air outlet 311 communicated with the air duct 350 is arranged on the side wall of the accommodating cabinet 310; the air enters the heat dissipation cabinet 320 from the air inlet 322 of the heat dissipation cabinet 320, flows through the heat dissipation cabinet 320, enters the air duct 350 through the air supply outlet 321, and is finally discharged from the air outlet 311, so that the heat stored in the accommodating cavity 370 can be taken away, and the heat dissipation effect is achieved. The accommodating chamber 370 and the air duct 350 are isolated from each other, so that the power distribution equipment in the accommodating chamber 370 can be prevented from being corroded and damaged by moisture or rainwater entering from the air inlet 322 and the air outlet 311, and the risk of electric leakage can be reduced.

Referring to fig. 1 and fig. 3, another embodiment of the present invention provides a photovoltaic combiner box, on the basis of the above embodiment, the photovoltaic combiner box further includes a heat dissipation fan 610, an electric control board 620, an internal power source 630 and a temperature sensor 640, the heat dissipation fan 610 and the electric control board 620 are disposed in the heat dissipation cabinet 320, the heat dissipation fan 610 includes a brushless dc motor 611 and a wind blade 612, a rotating shaft of the wind blade 612 is aligned with a center of the air supply opening 321, the brushless dc motor 611 is electrically connected with the electric control board 620, a driving circuit for driving the brushless dc motor 611 is disposed on the electric control board 620, the rotating shaft of the brushless dc motor 611 is fixedly connected with the rotating shaft of the wind blade 612, and the electric control board 620 drives the wind blade 612 to rotate through the brushless dc motor 611. The internal power source 630 and the temperature sensor 640 are disposed in the accommodating cavity 370, the internal power source 630 is electrically connected with the electronic control board 620 and the temperature sensor 640, and the temperature sensor 640 is electrically connected with the electronic control board 620. The first sealing connection terminal 331 is arranged on the partition 330 close to the air supply outlet 321, a lead connected with the temperature sensor 640 and the internal power supply 630 passes through the first sealing connection terminal 331 and the air supply outlet 321 from the accommodating cavity 370 and extends into the heat dissipation cabinet 320, a first sealing mechanism is arranged in the first sealing connection terminal 331, the aperture of the first sealing connection terminal 331 can be adjusted through the first sealing mechanism, after the lead passes through the first sealing connection terminal 331, the aperture of the first sealing connection terminal 331 can be adjusted according to the thickness of the lead, the first sealing connection terminal 331 can fix the lead and play a sealing role in the accommodating cavity 370, and water vapor is prevented from entering the accommodating cavity 370 from the first sealing connection terminal 331. Specifically, when the electronic control board 620 detects that the actual temperature in the accommodating cavity 370 exceeds the preset value through the temperature sensor 640, the electronic control board 620 starts the heat dissipation fan 610 to accelerate the air flow in the air duct 350, so that the flowing air takes away the heat in the accommodating cavity 370, and the heat dissipation is accelerated. When the electronic control board 620 detects that the actual temperature in the accommodating cavity 370 is lower than the preset value through the temperature sensor 640, the electronic control board 620 turns off the heat dissipation fan 610. Through the cooling fan 610 and the temperature sensor 640 of this embodiment, the electric control board 620 can control the start and stop of the cooling fan 610 according to the actual temperature in the accommodating cavity 370, thereby achieving the purpose of energy saving.

Further, a plurality of anti-reverse diodes 810 connected in parallel, a plurality of positive input fuses 820 connected in parallel, a plurality of negative input fuses 830 connected in parallel, a positive bus bar 840 and a negative bus bar 850 are disposed in the accommodating cavity 370. The positive input fuse 820, the anti-reverse diode 810, the positive bus 840, the internal power source 630, the negative bus 850, and the negative input fuse 830 are electrically connected in sequence. The positive input fuse 820 is used to connect to the positive pole of the photovoltaic panel and the negative input fuse 830 is used to connect to the negative pole of the photovoltaic panel. The positive and negative terminals of a plurality of photovoltaic panels separated from each other can be simultaneously connected through the positive input fuse 820 and the negative input fuse 830, electric power of each photovoltaic panel is converged to the positive bus bar 840 through the positive input fuse 820 and the anti-reverse diode 810 and is output to the power distribution apparatus through the positive bus bar 840, and the negative bus bar 850 and the negative input fuse 830 provide a return path for each photovoltaic panel. The internal power source 630 and the power distribution equipment are connected in parallel between the positive bus 840 and the negative bus 850 to obtain the DC voltage provided by the photovoltaic panel, a DC to DC (direct current to direct current) conversion circuit and an LDO (low dropout regulator) circuit are arranged in the internal power source 630, and the internal power source 630 converts the DC voltage provided by the photovoltaic panel into the working voltages of the electric control panel 620 and the temperature sensor 640 and outputs the working voltages to the electric control panel 620 and the temperature sensor 640.

In order to provide a path for connecting the positive and negative terminals of the photovoltaic panel, a plurality of second hermetic terminal blocks 312 are provided at the bottom of the receiving cavity 370, and the positive and negative terminals of the photovoltaic panel are electrically connected to the positive and negative input fuses 820 and 830 in the receiving cavity 370 through wires passing through the second hermetic terminal blocks 312. Second sealed binding post 312 is provided with the second sealing mechanism, the aperture of second sealed binding post 312 can be adjusted through the second sealing mechanism, after the wire passed second sealed binding post 312, can adjust the aperture of second sealed binding post 312 according to the thickness of wire, second sealed binding post 312 can play the effect that fixed wire and sealed chamber 370 that holds, prevent that steam from entering into from second sealed binding post 312 and holding in the chamber 370, prevent to hold the distribution equipment in the chamber 370 and corroded, reduce the risk of electric leakage.

Further, the outer wall of the heat dissipation cabinet 320 is connected with a first shield 910, the first shield 910 is disposed to cover the air inlet 322, the first shield 910 is communicated with the air inlet 322, and a first dust screen 920 is disposed at one end of the first shield 910 away from the air inlet 322; the outer wall of the accommodating cabinet 310 is connected with a second protective cover 930, the second protective cover 930 is disposed to cover the air outlet 311, the second protective cover 930 is communicated with the air outlet 311, and a second dust-proof net 940 is disposed at an end of the second protective cover 930 far away from the air outlet 311. The first protective cover 910 and the second protective cover 930 according to this embodiment can further enhance the waterproof performance of this embodiment, prevent rainwater or water vapor from entering the heat dissipation cabinet 320 and the air duct 350 through the air inlet 322 and the air outlet 311, prevent the electric control board 620 and the heat dissipation fan 610 from being corroded by water vapor, and prevent the electric control board 620 and the heat dissipation fan 610 from being soaked in water and causing electric leakage.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A photovoltaic combiner box, comprising:

2. The photovoltaic combiner box of claim 1, further comprising a heat dissipation fan, an electronic control board, and an internal power source, wherein the heat dissipation fan and the electronic control board are disposed in the heat dissipation cabinet, the internal power source is disposed in the receiving cabinet, the electronic control board is electrically connected to the heat dissipation fan and the internal power source, and the heat dissipation fan is configured to flow gas in the heat dissipation cabinet into the air duct.

3. The photovoltaic combiner box of claim 2, further comprising a temperature sensor disposed within the containment cabinet, the temperature sensor electrically connected to the internal power source and the electronic control board.

4. The photovoltaic combiner box of claim 3, wherein a first sealed terminal is disposed on the partition, and the receiving cabinet is communicated with the heat dissipating cabinet through the first sealed terminal and the air supply opening.

5. The photovoltaic combiner box of claim 4, wherein a number of second sealed terminals are disposed on the bottom of the containment cabinet, and the interior of the containment cabinet is communicated with the exterior of the containment cabinet through the second sealed terminals.

6. The photovoltaic combiner box of claim 5, further comprising an anti-flyback diode, a positive input fuse, a negative input fuse, a positive busbar, and a negative busbar, the positive input fuse, the anti-flyback diode, the positive busbar, the internal power source, the negative busbar, and the negative input fuse being electrically connected in sequence, the positive input fuse being for connection to a positive pole of a photovoltaic panel, the negative input fuse being for connection to a negative pole of the photovoltaic panel.

7. The photovoltaic combiner box of claim 1, wherein a first protective cover is disposed on an outer wall of the heat dissipation cabinet, the first protective cover covers the air inlet, and a first dust screen is disposed at an end of the first protective cover away from the air inlet.

8. The photovoltaic combiner box of claim 1, wherein a second protective cover is disposed on an outer wall of the accommodating cabinet, the second protective cover covers the air outlet, and a second dust screen is disposed at an end of the second protective cover away from the air outlet.

9. The photovoltaic combiner box of claim 1, wherein the support base comprises a first support bar, a second support bar and a connecting bar, the first support bar is shorter than the second support bar, a first connecting plate is arranged at one end of the first support bar, a first connecting hole is formed in the first connecting plate, one end, away from the first connecting plate, of the first support bar is connected with the support bar, a second connecting plate is arranged at one end of the second support bar, a second connecting hole is formed in the second connecting plate, one end, away from the second connecting plate, of the second support bar is connected with the support bar, and the connecting bar is connected with the first support bar and the second support bar.

10. The photovoltaic combiner box of claim 1, wherein the number of the cantilevers is two, first fixing holes are formed in the cantilevers and axially distributed along the cantilevers, a fixing plate is arranged on an outer wall of the box body, a second fixing hole is formed in the fixing plate, and the box body is connected with the cantilevers through the fixing plate.