CN217010721U

CN217010721U - Non-isolated two-stage string type photovoltaic grid-connected inverter

Info

Publication number: CN217010721U
Application number: CN202220690074.2U
Authority: CN
Inventors: 李小华; 胡大朋; 满建舫; 王少丞
Original assignee: Yucheng Electrical Appliance Co ltd
Current assignee: Yucheng Electrical Appliance Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-19
Anticipated expiration: 2032-03-28

Abstract

The utility model discloses a non-isolated two-stage string type photovoltaic grid-connected inverter, which belongs to the field of inverters and comprises an inverter main body, wherein a plurality of heat dissipation holes are formed in two sides of the inverter main body, a top cover is installed at the top of the inverter main body, a smoke alarm is also installed at the top of the inverter main body, a plugging mechanism matched with the heat dissipation holes for use is further arranged on the inverter main body, a vacuum air pump is installed at the top of the inverter main body, and an air exhaust end of the vacuum air pump is communicated with an inner cavity of the inverter main body through a pipeline. It can realize when the inside fire that fires of dc-to-ac converter main part for oxygen can't get into, and the inside oxygen of dc-to-ac converter main part disappears and will stop burning, and the fire extinguisher among the cooperation prior art uses, thereby reaches more comprehensive fire extinguishing effect, and can prevent when the rainy day that the rainwater from getting into in the dc-to-ac converter main part, and can guarantee the radiating effect.

Description

Non-isolated two-stage string type photovoltaic grid-connected inverter

Technical Field

The utility model relates to the field of inverters, in particular to a non-isolated two-stage group string type photovoltaic grid-connected inverter.

Background

The authorization publication number is: the photovoltaic inverter protection device and the photovoltaic inverter disclosed by CN202121263682.7 are characterized in that when the inverter is on fire, the inverter can be quickly extinguished through the extinguishing cylinder, and the photovoltaic inverter protection device is of an assembled structure and is low in production cost;

however, the fire extinguishing effect of the single-use fire extinguishing cylinder is not perfect enough for the inside of the inverter, the position of the fire extinguishing cylinder and the communication position of the fire extinguishing cylinder and the inverter are fixed positions, the corner position cannot be directly extinguished in use, and the fire extinguisher cannot be guaranteed to reburn after being sprayed out once in fire.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

Aiming at the problems in the prior art, the utility model aims to provide a non-isolated two-stage group string type photovoltaic grid-connected inverter, which can prevent oxygen from entering when fire breaks out in an inverter main body, stop combustion when oxygen disappears in the inverter main body, and be used in combination with a fire extinguisher in the prior art, so that a more comprehensive fire extinguishing effect is achieved, rainwater can be prevented from entering the inverter main body in rainy days, and a heat dissipation effect can be ensured.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

Non-isolation two-stage string type photovoltaic grid-connected inverter comprises an inverter main body, a plurality of heat dissipation holes are formed in the two sides of the inverter main body, a top cover is installed at the top of the inverter main body, a smoke alarm is further installed at the top of the inverter main body, a plugging mechanism matched with the heat dissipation holes for use is further arranged on the inverter main body, a vacuum air pump is installed at the top of the inverter main body, the air exhaust end of the vacuum air pump is communicated with the inner cavity of the inverter main body through a pipeline, a control module is further installed on the inverter main body, the smoke alarm and the vacuum air pump are both electrically connected with the control module, and a heat dissipation mechanism is further arranged on one side of the inverter main body.

Further, plugging mechanism includes the picture peg of inverter main part both sides activity grafting, a plurality of through-holes have been seted up on the surface of picture peg, and are a plurality of the through-hole is with a plurality of the louvre size is the same and correspond the intercommunication each other, two the top interlude of picture peg has the connecting plate, the bottom of connecting plate is connected with to be fixed the small-size cylinder at inverter main part top, small-size cylinder with control module electric connection.

Further, heat dissipation mechanism is including installing the U-shaped plate of dc-to-ac converter main part one side, the bottom of U-shaped plate is provided with the bottom plate, the top of bottom plate is installed and is alternates L shape pole in the U-shaped plate, the one end of L shape pole run through extremely in the top cap and with picture peg fixed connection, still install on the top cap with control module electric connection's rainwater sensor.

Furthermore, two limit blocks are installed on one side of the plug board, the limit blocks are far away from one end of the plug board is inserted into the inner wall of the inverter main body, and limit grooves matched with the limit blocks for use are formed in the inner wall of the inverter main body.

Furthermore, the length and the width of the bottom plate are not smaller than those of the outer side of the U-shaped plate.

Further, the distance between the bottom of the U-shaped plate and the bottom plate is equal to the width of the through hole.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

this scheme can send out the police dispatch newspaper and send a signal to control module when dc-to-ac converter main part inner chamber is on fire through the smog siren, control module control shutoff mechanism and vacuum air pump function, shutoff mechanism forms the closure with dc-to-ac converter main part inner chamber and makes outside oxygen can't get into, oxygen is taken out to cooperation vacuum air pump, and the oxygen that consumes during the burning, thereby it is the rarefied prevention burning of the inside oxygen of dc-to-ac converter main part, reach the effect of putting out a fire, and can prevent that the rainwater from getting into inside the dc-to-ac converter main part when rainy day through heat dissipation mechanism, and can guarantee the radiating effect of dc-to-ac converter main part.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is an exploded view of the plugging mechanism and heat dissipation mechanism of the present invention;

FIG. 3 is a top cross-sectional view of the present invention;

FIG. 4 is a front cross-sectional view of a portion of the present invention;

fig. 5 is an enlarged view of the utility model at a in fig. 2.

The reference numbers in the figures illustrate:

1. an inverter main body; 2. heat dissipation holes; 3. a top cover; 4. a smoke alarm; 5. inserting plates; 6. a through hole; 7. a connecting plate; 8. a small cylinder; 9. a vacuum air pump; 10. a control module; 11. a U-shaped plate; 12. a base plate; 13. an L-shaped rod; 14. a rain sensor; 15. a limiting block; 16. a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is to be understood that the embodiments described are merely exemplary embodiments, rather than exemplary embodiments, and that all other embodiments may be devised by those skilled in the art without departing from the scope of the present invention.

The embodiment is as follows:

referring to fig. 1-5, a non-isolated two-stage string type photovoltaic grid-connected inverter includes an inverter main body 1, a plurality of heat dissipation holes 2 are formed in both sides of the inverter main body 1, a top cover 3 is installed on the top of the inverter main body 1, a smoke alarm 4 is further installed on the top of the inverter main body 1, a plugging mechanism used in cooperation with the heat dissipation holes 2 is further arranged on the inverter main body 1, a vacuum air pump 9 is installed on the top of the inverter main body 1, an air exhaust end of the vacuum air pump 9 is communicated with an inner cavity of the inverter main body 1 through a pipeline, a control module 10 is further installed on the inverter main body 1, the smoke alarm 4 and the vacuum air pump 9 are both electrically connected with the control module 10, and a heat dissipation mechanism is further arranged on one side of the inverter main body 1;

can send out the police dispatch newspaper and send a signal to control module 10 when 1 inner chamber of inverter main part is on fire through smoke alarm 4, control module 10 control shutoff mechanism and vacuum air pump 9 function, shutoff mechanism makes outside oxygen can't get into with 1 inner chamber of inverter main part formation closure, cooperate vacuum air pump 9 to take out oxygen, and the oxygen that consumes during the burning, it is thin thereby the prevention burning of 1 inside oxygen of inverter main part, it uses to cooperate the installation fire extinguisher among the prior art again (this is prior art, consequently, fire extinguisher and associated structure are not shown in this scheme), thereby can reach and reach better fire extinguishing effect, and can prevent that the rainwater from getting into inside inverter main part 1 when rainy day through heat dissipation mechanism, and can guarantee inverter main part 1's radiating effect.

Referring to fig. 2, the plugging mechanism comprises plug boards 5 movably inserted at two sides of the inverter main body 1, a plurality of through holes 6 are formed in the surfaces of the plug boards 5, the through holes 6 and the heat dissipation holes 2 have the same size and are communicated with each other correspondingly, a connecting plate 7 is inserted at the tops of the two plug boards 5, a small cylinder 8 fixed at the top of the inverter main body 1 is connected to the bottom of the connecting plate 7, and the small cylinder 8 is electrically connected with a control module 10;

when the inside of dc-to-ac converter main part 1 is on fire, smog siren 4 can send out the police dispatch newspaper and send a signal to control module 10, and control module 10 control small-size cylinder 8 and vacuum air pump 9 open the function, then drive connecting plate 7 through small-size cylinder 8 and move up, and connecting plate 7 drives picture peg 5 and moves up for through-hole 6 staggers with louvre 2, thereby closes dc-to-ac converter main part 1 completely.

Referring to fig. 1 and 2, the heat dissipation mechanism includes a U-shaped plate 11 installed at one side of the inverter main body 1, a bottom plate 12 is installed at the bottom of the U-shaped plate 11, an L-shaped rod 13 inserted into the U-shaped plate 11 is installed at the top of the bottom plate 12, one end of the L-shaped rod 13 penetrates into the top cover 3 and is fixedly connected with the plug board 5, and a rainwater sensor 14 electrically connected with the control module 10 is also installed on the top cover 3;

rainwater sensor 14 can respond to the rainwater and send a signal to control module 10, control module 10 controls small-size cylinder 8 and opens, 1 inner chamber of inverter main part seals when small-size cylinder 8 drives picture peg 5 and removes, 2 departments of louvre can not get into the rainwater, and picture peg 5 can drive bottom plate 12 through L shape pole 13 and shift up when removing, make bottom plate 12 to 11 bottom shutoff of U-shaped plate, through collecting the rainwater between U-shaped plate 11 and the inverter main part 1 and guarantee inverter main part 1's radiating effect.

Referring to fig. 4 and 5, two limiting blocks 15 are installed on one side of the board 5, one ends of the limiting blocks 15 far away from the board 5 are inserted into the inner wall of the inverter main body 1, and a limiting groove 16 used in cooperation with the limiting blocks 15 is formed in the inner wall of the inverter main body 1;

the arrangement of the limiting block 15 and the limiting groove 16 can ensure that the time-sharing inserting plate 5 has certain transverse movement when moving up and down, thereby avoiding overlarge friction with the inner wall of the inverter main body 1, unsmooth movement and smaller force required by movement.

Referring to fig. 2, the length and width of the bottom plate 12 are both not less than the length and width of the outside of the U-shaped plate 11;

the arrangement can ensure that the bottom plate 12 can cover the space between the U-shaped plate 11 and the inverter main body 1, so that the sealing effect can be improved, and collected rainwater is not easy to leak.

Referring to fig. 2, the distance between the bottom of the U-shaped plate 11 and the bottom plate 12 is equal to the width of the through hole 6;

set up like this and to make small-size cylinder 8 drive picture peg 5 move up through-hole 6 and louvre 2 back that staggers, bottom plate 12 just in time laminates the bottom of U-shaped board 11 to the chronogenesis makes small-size cylinder 8 operate at every turn and moves picture peg 5 and move the distance of removal can.

The working principle is as follows: when a fire breaks out in the inverter main body 1, the smoke alarm 4 can send an alarm and send a signal to the control module 10, the control module 10 controls the small cylinder 8 and the vacuum air pump 9 to start operation, then the small cylinder 8 drives the connecting plate 7 to move upwards, the connecting plate 7 drives the plugboard 5 to move upwards, the through hole 6 and the radiating hole 2 are staggered, the inverter main body 1 is completely sealed, the vacuum air pump 9 continuously pumps air in the inner cavity of the inverter main body 1, and air consumed by combustion is added, so that the air is thin and the combustion is stopped;

when rainy weather, rainwater sensor 14 can respond to the rainwater and send a signal to control module 10, control module 10 controls small cylinder 8 to open, 1 inner chamber of inverter main part is sealed when small cylinder 8 drives picture peg 5 to remove, 2 departments of louvre can not get into the rainwater, and picture peg 5 can drive bottom plate 12 through L shape pole 13 when removing and shift up, make bottom plate 12 to 11 bottom shutoff of U-shaped board, collect the rainwater through between U-shaped board 11 and the inverter main part 1 and guarantee inverter main part 1's radiating effect.

The foregoing is only a preferred embodiment of the present invention; the scope of the utility model is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. Non-isolated two-stage group string type photovoltaic grid-connected inverter comprises an inverter main body (1) and is characterized in that: a plurality of louvres (2) have all been seted up to the both sides of inverter main part (1), top cap (3) are installed at the top of inverter main part (1), smoke alarm (4) are still installed at the top of inverter main part (1), still be provided with on inverter main part (1) with shutoff mechanism that louvre (2) cooperation was used, vacuum air pump (9) are installed at the top of inverter main part (1), just the end of bleeding of vacuum air pump (9) pass through the pipeline with the inner chamber intercommunication of inverter main part (1), still install control module (10) on inverter main part (1), smoke alarm (4) and vacuum air pump (9) all with control module (10) electric connection, one side of inverter main part (1) still is provided with heat dissipation mechanism.

2. The non-isolated two-stage string-type photovoltaic grid-connected inverter according to claim 1, characterized in that: blocking mechanism includes picture peg (5) of pegging graft in inverter main part (1) both sides activity, a plurality of through-holes (6) have been seted up on the surface of picture peg (5), and are a plurality of through-hole (6) are with a plurality of louvre (2) size is the same and correspond the intercommunication each other, two the top interlude of picture peg (5) has connecting plate (7), the bottom of connecting plate (7) is connected with to be fixed small-size cylinder (8) at inverter main part (1) top, small-size cylinder (8) with control module (10) electric connection.

3. The non-isolated two-stage string-type photovoltaic grid-connected inverter according to claim 2, wherein: radiating mechanism is including installing U-shaped plate (11) of inverter main part (1) one side, the bottom of U-shaped plate (11) is provided with bottom plate (12), alternate in L shape pole (13) in U-shaped plate (11) are installed at the top of bottom plate (12), the one end of L shape pole (13) run through extremely in top cap (3) and with picture peg (5) fixed connection, still install on top cap (3) with control module (10) electric connection's rainwater sensor (14).

4. The non-isolated two-stage string photovoltaic grid-connected inverter according to claim 2, wherein: two stopper (15) are installed to one side of picture peg (5), stopper (15) are kept away from the one end of picture peg (5) is pegged graft in the inner wall of dc-to-ac converter main part (1), just seted up on the inner wall of dc-to-ac converter main part (1) with stopper (15) cooperation use spacing groove (16).

5. The non-isolated two-stage string photovoltaic grid-connected inverter according to claim 3, wherein: the length and the width of the bottom plate (12) are not less than those of the outer side of the U-shaped plate (11).

6. The non-isolated two-stage string-type photovoltaic grid-connected inverter according to claim 3, wherein: the distance between the bottom of the U-shaped plate (11) and the bottom plate (12) is equal to the width of the through hole (6).