CN220915248U

CN220915248U - Photovoltaic is little contrary mechanism that prevents against current for being incorporated into power networks

Info

Publication number: CN220915248U
Application number: CN202321664190.8U
Authority: CN
Inventors: 刘安家; 裴晨阳; 周连军
Original assignee: Suzhou Tengsheng Technology Co ltd
Current assignee: Suzhou Tengsheng Technology Co ltd
Priority date: 2023-06-28
Filing date: 2023-06-28
Publication date: 2024-05-07
Anticipated expiration: 2033-06-28

Abstract

The utility model relates to an anti-reflux mechanism for photovoltaic micro-inversion grid connection, which comprises a box body, wherein an inversion protection mechanism is arranged in the box body, an auxiliary assembly is arranged in the box body, the inversion protection mechanism comprises an installation chamber and a liquid storage bin, the installation chamber is internally provided with an inner shell, a cooling groove is formed in the inner shell, a circulating pump communicated with the cooling groove is fixedly connected in the liquid storage bin, a refrigerating sheet is fixedly connected to the inner wall of the liquid storage bin, and a drying box is fixedly connected to the top of the inner shell. According to the photovoltaic micro-inverse grid-connected anti-reflux mechanism, the temperature sensor can be used for monitoring the temperature change in the inner shell, so that cooling liquid flows in the cooling groove of the inner shell to realize one-time heat dissipation, air can flow between the box body and the inner shell to realize two-time heat dissipation, and cold air is directly contacted with the inverter to realize three-time heat dissipation, so that the heat dissipation efficiency can be adjusted according to requirements, and the inverter is well heat dissipation and protection can be realized.

Description

Photovoltaic is little contrary mechanism that prevents against current for being incorporated into power networks

Technical Field

The utility model relates to the technical field of photovoltaic power generation grid-connected systems, in particular to an anti-reflux mechanism for photovoltaic micro-inversion grid-connected.

Background

The photovoltaic power generation grid-connected system is characterized in that direct current generated by a solar module is converted into alternating current meeting the requirements of a commercial power grid through a grid-connected inverter and then directly connected into the public power grid, the photovoltaic power station is a photovoltaic power generation system, direct current generated by a solar panel is converted into alternating current identical to the power grid through the inverter and is used by a load, stable output power cannot be ensured for a long time due to the fact that sunlight irradiated on the solar panel is possibly influenced by environment, in order to provide stable and reliable power for the load, the photovoltaic power generation system is generally integrated into the power grid, when the photovoltaic power generation power is smaller than the power consumption of the load, insufficient electric quantity needs to be supplemented from the power grid side, when the photovoltaic power generation power is larger than the power consumption of the load, the inexhaustible electric quantity is transmitted to the power grid, and in order to reduce the influence of power generation power change of the photovoltaic system on the power grid as much as possible, the power generation power of the photovoltaic system is generally required to be smaller than or equal to the power consumption of the load, namely the anti-reflux system.

Please refer to a photovoltaic inverter with publication number CN208890665U for preventing reverse current, in this patent, it is proposed that "the existing photovoltaic inverter works outdoors for a long time and is exposed to sunlight by the sun; meanwhile, a large amount of heat is generated in the working process of the photovoltaic inverter, and the heat dissipation of the inverter is realized by heat exchange between cooling water flowing in the radiating pipe in the first radiating cavity and heat generated by the power module in the embodiment, however, the heat dissipation efficiency is lower only by contact with the inverter, and another technical scheme is provided for solving the problem.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides the anti-countercurrent mechanism for the photovoltaic micro-inversion grid connection, which has the advantages of good protection effect on the inverter, capability of providing two heat dissipation modes, effectively improving the heat dissipation efficiency and the like, and solves the problem that the existing photovoltaic inverter works outdoors for a long time and is exposed by a solar switch; meanwhile, the photovoltaic inverter can generate a large amount of heat in the working process, and the damage to components in the box body is easy to occur.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the photovoltaic micro-inversion grid-connected anti-countercurrent mechanism comprises a box body, wherein an inversion protection mechanism is arranged in the box body, and an auxiliary assembly is arranged in the box body;

The contravariant protection machanism includes the installation room and the stock solution storehouse of the inside setting of box, the inside of installation room is provided with the inner shell, the cooling bath has been seted up to the inside of inner shell, the inside fixedly connected with of stock solution storehouse is linked together with the circulating pump that the cooling bath is linked together, the inner wall fixedly connected with refrigeration piece in stock solution storehouse, the top fixedly connected with dry box of inner shell, the inside fixedly connected with of stock solution storehouse is linked together with the aspiration pump that is linked together, the inside of inner shell is provided with the jet-propelled seat that is linked together with dry box, the left side of box is provided with radiator unit, the inner wall fixedly connected with temperature sensor of inner shell.

Further, the connecting block is fixedly connected with one side of the inner shell opposite to the inner wall of the box body, the heat dissipation silica gel sheet is fixedly connected with the inner wall of the inner shell, and the front face of the inner shell is hinged with the sealing door.

Further, the cooling tank is serpentine arrangement in the inner shell, and one end of the cooling tank away from the circulating pump is fixedly connected with a return pipe extending to the liquid storage bin.

Further, the left side fixedly connected with of box extends to the intake pipe of stock solution storehouse, and the inside of intake pipe is provided with first check valve, the inner wall fixedly connected with baffle in stock solution storehouse, the inner wall in stock solution storehouse is relative with the baffle one side fixedly connected with ventilative board.

Further, battery and control circuit are fixedly connected with the top of inner shell, and battery and control circuit all are connected with circulating pump, refrigeration piece, aspiration pump, radiator unit and temperature sensor electricity.

Further, the bottom fixedly connected with blast pipe of inner shell, the inside of blast pipe is provided with the second check valve.

Further, the radiating component consists of a protection frame, a protection net and a fan, wherein the fan is fixedly connected to the inner side of the protection frame, the protection net is fixedly connected to the left side of the protection frame, a radiating opening corresponding to the position of the radiating component is formed in the left side of the box, and communication holes positioned on the upper side and the lower side of the radiating component are formed in the left side of the box.

Further, the auxiliary assembly comprises a mounting block fixedly mounted at the top of the box body, a bolt in threaded connection with the box body is movably connected in the mounting block, a dehumidifier and an activated carbon plate are arranged in the drying box, and an inlet and an outlet corresponding to the mounting block are formed in the top of the drying box.

Compared with the prior art, the technical scheme of the application has the following beneficial effects:

1. This photovoltaic is little contrary mechanism that prevents against current for being incorporated into power networks can install the dc-to-ac converter in the inner shell through the contravariant protection machanism that sets up to utilize temperature sensor to monitor the temperature variation in the inner shell, when the dc-to-ac converter operation, the drive effect of usable circulating pump makes the coolant liquid flow in the cooling tank of inner shell, thereby utilize the heat transfer effect of inner shell and the dc-to-ac converter to carry out the heat exchange, realize a heavy heat dissipation, cooperation radiating assembly's effect can make the air flow between box and inner shell, thereby reduce the temperature of inner shell outer wall and realize the double heat dissipation, if the temperature in the inner shell exceeds the predetermined value, then can make the air conditioning in the aspiration pump stock solution storehouse carry in the inner shell, make the air conditioning directly contact with the dc-to-ac converter, realize triple heat dissipation, in order to adjust radiating efficiency according to the demand, carry out good heat dissipation protection to the dc-to-ac converter.

2. According to the photovoltaic micro-inverse grid-connected anti-reflux mechanism, through the auxiliary assembly, the mounting block can be dismounted by using the bolts, so that the dehumidifying agent and the active carbon plate in the drying box can be replaced after the drying box is used for a period of time.

Drawings

FIG. 1 is a cross-sectional view of the structure of the present utility model;

FIG. 2 is a front elevational view of the inner housing of the present utility model;

Fig. 3 is a schematic view showing the internal structure of the drying box according to the present utility model.

In the figure: 1. a case; 01. a mounting chamber; 02. a liquid storage bin; 2. an inner case; 201. sealing the door; 3. a cooling sheet; 4. a circulation pump; 5. a cooling tank; 6. a heat dissipation assembly; 7. a temperature sensor; 8. a storage battery; 9. a control circuit; 10. an air extracting pump; 11. a drying box; 12. a jet seat; 13. a mounting block; 14. a ventilation plate; 15. an exhaust pipe; 16. a dehumidifying agent; 17. an activated carbon plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, an anti-backflow mechanism for photovoltaic micro-inversion grid connection in this embodiment includes a box 1, an inversion protection mechanism is disposed in the box 1, and an auxiliary assembly is disposed in the box 1.

Embodiment one: the contravariant protection machanism includes the installation room 01 and the stock solution storehouse 02 that box 1 inside set up, the inside of installation room 01 is provided with inner shell 2, one side fixedly connected with connecting block that inner shell 2 is relative with box 1 inner wall, conveniently utilize the connecting block to separate inner shell 2 and box 1, so as to form the air current chamber, the inner wall fixedly connected with heat dissipation silica gel piece of inner shell 2, conveniently utilize the heat dissipation silica gel piece to reduce the thermal resistance of dc-to-ac converter and inner shell 2 contact surface, the front of inner shell 2 articulates there is sealing door 201, cooling tank 5 has been seted up to the inside of inner shell 2, the inside fixedly connected with of stock solution storehouse 02 is linked together with circulating pump 4 of cooling tank 5.

Wherein, cooling tank 5 is snakelike arrangement in inner shell 2, conveniently improves the heat transfer area of coolant liquid, and the one end fixedly connected with that cooling tank 5 kept away from circulating pump 4 extends to the back flow of stock solution storehouse 02, conveniently makes the liquid that flows in the cooling tank 5 get into stock solution storehouse 02 with the back flow, and the inner wall fixedly connected with refrigeration piece 3 of stock solution storehouse 02, the top fixedly connected with dry box 11 of inner shell 2, the inside fixedly connected with of stock solution storehouse 02 with the aspiration pump 10 that is linked together, the inside of inner shell 2 is provided with jet holder 12 that is linked together with dry box 11.

In this embodiment, the left side fixedly connected with of box 1 extends to the intake pipe of stock solution storehouse 02, and the inside of intake pipe is provided with first check valve, makes the external gas utilize the intake pipe to get into stock solution storehouse 02 when aspiration pump 10 operates, and the inner wall fixedly connected with baffle of stock solution storehouse 02, the inner wall of stock solution storehouse 02 and the relative one side fixedly connected with ventilation plate 14 of baffle, conveniently utilize ventilation plate 14 to filter the gas that gets into aspiration pump 10, reduce the moisture in the air that gets into dry box 11.

Wherein, the left side of box 1 is provided with radiator unit 6, radiator unit 6 comprises guard frame, protection network and fan, and wherein the inboard fixedly connected with fan of guard frame, and the left side fixedly connected with protection network of guard frame, the left side of box 1 has seted up the thermovent corresponding with radiator unit 6 position, and the intercommunicating pore that is located radiator unit 6 upper and lower both sides has been seted up in the left side of box 1, makes things convenient for when the fan in radiator unit 6 operates, utilizes thermovent extraction air in the box 1.

Wherein, the bottom fixedly connected with blast pipe 15 of inner shell 2, the inside of blast pipe 15 is provided with the second check valve, conveniently utilize the air in blast pipe 15 exhaust inner shell 2, the inner wall fixedly connected with temperature sensor 7 of inner shell 2, the top fixedly connected with battery 8 and the control circuit 9 of inner shell 2, and battery 8 and control circuit 9 all are connected with circulating pump 4, refrigeration piece 3, aspiration pump 10, radiator unit 6 and temperature sensor 7 electricity, conveniently utilize battery 8 to supply energy for each electronic device, utilize control circuit 9 to coordinate and the controller operation.

The photovoltaic micro-inverse grid-connected anti-reflux mechanism can be used for installing an inverter in an inner shell 2 through the arranged inversion protection mechanism, and monitoring temperature change in the inner shell 2 through a temperature sensor 7, when the inverter runs, cooling liquid can flow in a cooling groove 5 of the inner shell 2 through the driving action of a circulating pump 4, so that heat exchange is carried out between the heat transfer effect of the inner shell 2 and the inverter, heat dissipation is realized again, air can flow between a box body 1 and the inner shell 2 through the action of a heat dissipation assembly 6, double heat dissipation is realized by reducing the temperature of the outer wall of the inner shell 2, if the temperature in the inner shell 2 exceeds a preset value, cold air in a liquid storage bin 02 of an air pump 10 is conveyed into the inner shell 2, the cold air is directly contacted with the inverter, triple heat dissipation is realized, so that the heat dissipation efficiency is adjusted according to requirements, and good heat dissipation protection is carried out on the inverter.

Embodiment two: the auxiliary assembly comprises a mounting block 13 fixedly mounted at the top of the box body 1, a bolt in threaded connection with the box body 1 is movably connected in the mounting block 13, a dehumidifying agent 16 and an active carbon plate 17 are arranged in the drying box 11, and an inlet and an outlet corresponding to the mounting block 13 are formed in the top of the drying box 11.

The photovoltaic micro-inverse grid-connected anti-reflux mechanism can realize the disassembly and assembly operation of the mounting block 13 by using bolts through the arranged auxiliary assembly, so that the dehumidifier 16 and the activated carbon plate 17 in the photovoltaic micro-inverse grid-connected anti-reflux mechanism can be replaced after the drying box 11 is used for a period of time.

The working principle of the embodiment is as follows:

When the photovoltaic micro-inversion grid-connected anti-reflux mechanism is used, an inverter can be installed in an inner shell 2, the temperature change in the inner shell 2 is monitored by a temperature sensor 7, when the inverter normally operates, cooling liquid can flow in a cooling tank 5 of the inner shell 2 by using the driving action of a circulating pump 4, so that the inverter and the inner shell 2 exchange heat, the inverter can be subjected to heat dissipation again, a heat dissipation assembly 6 can be operated in the process, a fan in the heat dissipation assembly 6 can be used for extracting air in a box body 1 by using a heat dissipation opening, the temperature of the outer wall of the inner shell 2 is reduced, and if the temperature in the inner shell 2 exceeds a preset value, cold air in a liquid storage bin 02 of an air pump 10 is conveyed into the inner shell 2, the cold air is directly contacted with the inverter, triple heat dissipation is realized, in the process, external air can enter the liquid storage bin 02 by using an air inlet pipe, the liquid storage bin 02 is prevented from being in a negative pressure state, and the air in the inner shell 2 can be discharged through an exhaust pipe 15.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a photovoltaic is contrary mechanism that prevents against current for grid-connected a little, includes box (1), its characterized in that: an inversion protection mechanism is arranged in the box body (1), and an auxiliary component is arranged in the box body (1);

The contravariant protection machanism includes installation room (01) and stock solution storehouse (02) that box (1) inside set up, the inside of installation room (01) is provided with inner shell (2), cooling tank (5) have been seted up to the inside of inner shell (2), the inside fixedly connected with of stock solution storehouse (02) is with circulating pump (4) that cooling tank (5) are linked together, the inner wall fixedly connected with refrigeration piece (3) of stock solution storehouse (02), the top fixedly connected with dry box (11) of inner shell (2), the inside fixedly connected with of stock solution storehouse (02) is with aspiration pump (10) that are linked together, the inside of inner shell (2) is provided with jet-propelled seat (12) that are linked together with dry box (11), the left side of box (1) is provided with radiator unit (6), the inner wall fixedly connected with temperature sensor (7) of inner shell (2).

2. The anti-reflux mechanism for photovoltaic micro-inversion grid connection according to claim 1, wherein: the inner shell (2) is fixedly connected with a connecting block on one side opposite to the inner wall of the box body (1), the inner wall of the inner shell (2) is fixedly connected with a heat dissipation silica gel sheet, and the front surface of the inner shell (2) is hinged with a sealing door (201).

3. The anti-reflux mechanism for photovoltaic micro-inversion grid connection according to claim 1, wherein: the cooling tank (5) is arranged in a serpentine shape in the inner shell (2), and one end, far away from the circulating pump (4), of the cooling tank (5) is fixedly connected with a return pipe extending to the liquid storage bin (02).

4. The anti-reflux mechanism for photovoltaic micro-inversion grid connection according to claim 1, wherein: the left side fixedly connected with of box (1) extends to the intake pipe of stock solution storehouse (02), and the inside of intake pipe is provided with first check valve, the inner wall fixedly connected with baffle of stock solution storehouse (02), the inner wall of stock solution storehouse (02) is connected with ventilative board (14) with one side that the baffle is relative.

5. The anti-reflux mechanism for photovoltaic micro-inversion grid connection according to claim 1, wherein: the top fixedly connected with battery (8) and control circuit (9) of inner shell (2), and battery (8) and control circuit (9) all are connected with circulating pump (4), refrigeration piece (3), aspiration pump (10), radiator unit (6) and temperature sensor (7) electricity.

6. The anti-reflux mechanism for photovoltaic micro-inversion grid connection according to claim 1, wherein: the bottom of the inner shell (2) is fixedly connected with an exhaust pipe (15), and a second one-way valve is arranged in the exhaust pipe (15).

7. The anti-reflux mechanism for photovoltaic micro-inversion grid connection according to claim 1, wherein: the heat radiation assembly (6) consists of a protection frame, a protection net and a fan, wherein the fan is fixedly connected to the inner side of the protection frame, the protection net is fixedly connected to the left side of the protection frame, a heat radiation opening corresponding to the heat radiation assembly (6) is formed in the left side of the box body (1), and communication holes located on the upper side and the lower side of the heat radiation assembly (6) are formed in the left side of the box body (1).

8. The anti-reflux mechanism for photovoltaic micro-inversion grid connection according to claim 1, wherein: the auxiliary assembly comprises a mounting block (13) fixedly mounted at the top of the box body (1), a bolt in threaded connection with the box body (1) is movably connected inside the mounting block (13), a dehumidifying agent (16) and an active carbon plate (17) are arranged inside the drying box (11), and an inlet and an outlet corresponding to the mounting block (13) are formed in the top of the drying box (11).