Distributed photovoltaic water pump inverter

Abstract

The utility model discloses a kind of distributed photovoltaic water pump inverters, including integrated box, the outside wall of the integrated box is installed with PLC controller and GSM alarm in turn.The utility model uses when, when photovoltaic system electric energy is insufficient, hall current sensor on the first input cable will monitor that input current is lower than preset value, PLC controller will control corresponding circuit electronic switch device on the first input cable to close, and control corresponding circuit electronic switch device on the second input cable to open, stable current transmission is supplied to water pump by municipal power grid, if this local municipal power grid also appears power failure, hall current sensor on the first input cable and the second input cable will monitor abnormal situation, PLC controller will then directly control circuit electronic switch device on the third input cable to open, and circuit electronic switch device on the first input cable and the second input cable close, realize the automation switching for input circuit.

Description

Technical Field

[0001] This utility model relates to the field of inverter technology, specifically a distributed photovoltaic water pump inverter. Background Technology

[0002] Distributed photovoltaic (PV) water pump systems are commonly used in agricultural irrigation, rural water supply, and desertification control. They are systems that use solar energy to generate electricity through photovoltaic panels to drive water pumps. The photovoltaic panels generate direct current (DC) under sunlight, but most water pumps rely on AC motors for driving. Therefore, it is necessary to use an inverter to convert the unstable DC power output from the photovoltaic panels into AC power that meets the requirements of the water pump motor.

[0003] Current inverters used for distributed photovoltaic water pumps often only supply power to the pumps through the output of the external photovoltaic system. When the photovoltaic system's power is insufficient, such as on cloudy days, users need to manually switch the water pumps to be powered by the municipal power grid. If the municipal power grid also fails, the irrigation system's water pumps will be forced to stop operating. This results in poor functionality and power supply stability of the device. Furthermore, when the inverter is running for a long time, it is prone to overheating, leading to decreased efficiency or even failure. Based on this, we propose a new type of distributed photovoltaic water pump inverter. Utility Model Content

[0004] The purpose of this invention is to provide a distributed photovoltaic water pump inverter to solve the problems mentioned in the background art, such as limited functionality, poor heat dissipation, lack of energy storage, and inability to automatically detect and switch circuits.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a distributed photovoltaic water pump inverter, comprising an integrated box, wherein a PLC controller and a GSM alarm are sequentially installed on the outer wall of the integrated box, an upper mounting cavity and a lower mounting cavity are respectively provided at the top and bottom of the integrated box, an upper heat exchange seat is provided on the inner wall of the upper mounting cavity, and a lower heat exchange seat is provided on the inner wall of the lower mounting cavity, wherein an emergency battery and a temperature sensor are sequentially installed inside the lower mounting cavity, and an inverter body is installed inside the upper mounting cavity, wherein a third input cable is connected between the inverter body and the emergency battery, and a first input cable and a second input cable are respectively connected to the inverter body at both ends of the third input cable, wherein Hall current sensors are installed on both the first input cable and the second input cable, and circuit electronic switching devices are installed on the first input cable, the second input cable and the third input cable, wherein a coolant storage box is fixed on one side of the integrated box, and a circulation pipe assembly is connected between the coolant storage box, the upper heat exchange seat and the lower heat exchange seat, wherein a micro water pump and a solenoid valve are respectively installed at the top and bottom of the circulation pipe assembly, and a semiconductor refrigeration chip is installed on the coolant storage box.

[0006] As a further technical solution of this utility model, the upper mounting cavity and the lower mounting cavity are internally connected, and a sealing cover plate is movably connected to one side of both the upper mounting cavity and the lower mounting cavity.

[0007] As a further technical solution of this utility model, a cooling surface embedded inside the coolant storage box is provided on one side of the semiconductor refrigeration chip, and a heating surface is provided on the side of the semiconductor refrigeration chip away from the coolant storage box.

[0008] As a further technical solution of this utility model, a miniature fan matching the heating surface is installed on the outer wall of the coolant storage box by screws.

[0009] As a further technical solution of this utility model, the upper heat exchange seat and the lower heat exchange seat are both made of copper alloy, and water passage cavities are provided inside the side walls of the upper heat exchange seat and the lower heat exchange seat.

[0010] As a further technical solution of this utility model, the bottom edge of the integrated box is evenly provided with fixing screw holes, so that the bottom of the integrated box can be fixed and installed by screws and fixing stakes.

[0011] As a further technical solution of this utility model, the output end of the inverter body is provided with an output cable.

[0012] As a further technical solution of this utility model, the outer side wall of the integrated box is provided with wiring holes that match the output cable, the first input cable and the second input cable in sequence, and an insulating sealant layer is provided between the output cable, the first input cable and the second input cable and the wiring holes respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] By incorporating an integrated box, the device optimizes its performance. The first and second input cables pass through the integrated box and are connected to the unstable DC power output from the photovoltaic panel and the municipal power grid, respectively. During operation, the DC power converted from solar energy by the distributed photovoltaic system is converted into AC power suitable for the water pump motor by the inverter and then supplied to the water pump via the output cable. When the photovoltaic system's power is insufficient, such as on cloudy days, the Hall current sensor on the first input cable detects that the input current is lower than a preset value. At this time, the PLC controller will control the corresponding electronic switch on the first input cable to close and the corresponding electronic switch on the second input cable to open, transmitting the stable current supplied by the municipal power grid to the water pump. If the municipal power grid also experiences a power outage... In the event of a power outage, the Hall current sensors on the first and second input cables will detect the abnormality. At this time, the PLC controller will directly control the electronic switch on the third input cable to open, while the electronic switches on the first and second input cables will close. Thus, by setting up three independently controlled input circuits, combined with real-time monitoring of the output current of the photovoltaic system and the municipal power grid, automatic switching of the input circuits is achieved without manual switching operations, improving the stability of the photovoltaic water pump power supply. Furthermore, when the third input cable is opened for use, the PLC controller will simultaneously control the GSM alarm to send an alarm SMS to the back-end staff. This allows users to promptly adjust the operation of the water pump irrigation system in response to power outages, providing high flexibility.

[0015] By incorporating thermoelectric coolers, the device optimizes its structure. Temperature sensors monitor the internal temperature of the integrated box in real time. When the temperature exceeds a preset safety value, the PLC controller energizes the thermoelectric cooler, allowing its cooling surface to cool the coolant inside the coolant storage box. A micro fan provides air cooling to the exposed heat-generating surface of the thermoelectric cooler, ensuring that the cooling effect is not affected by delayed heating. Simultaneously, a micro water pump and solenoid valve activate, continuously circulating the coolant between the coolant storage box and the upper and lower heat exchangers. The upper and lower heat exchangers, fixed inside the upper and lower mounting cavities respectively, displace the heat generated by the inverter and emergency battery inside the integrated box through thermal conductivity. This achieves highly efficient water-cooled heat dissipation protection, mitigating efficiency drops and even malfunctions caused by overheating of the inverter power devices. Compared to common fan cooling, this water-cooling structure also prevents dust and debris from entering the device and causing contamination. Attached Figure Description

[0016] Figure 1 This is a front view of the structure of the present invention in its open state;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a front view schematic diagram of the closed state structure of this utility model;

[0019] Figure 4 This is a side view of the coolant storage box of this utility model.

[0020] Figure 5 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0021] In the diagram: 1. Integrated box; 2. Inverter body; 3. Emergency battery; 4. Coolant storage box; 5. Output cable; 6. Temperature sensor; 7. Upper mounting cavity; 8. Lower mounting cavity; 9. GSM alarm; 10. PLC controller; 11. Upper heat exchange base; 12. Lower heat exchange base; 13. Solenoid valve; 14. Miniature fan; 15. Semiconductor refrigeration chip; 16. Circulation pipe assembly; 17. Miniature water pump; 18. First input cable; 19. Third input cable; 20. Circuit electronic switching device; 21. Hall current sensor; 22. Second input cable. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-5 The present invention provides an embodiment of a distributed photovoltaic water pump inverter, comprising an integrated box 1, wherein a PLC controller 10 and a GSM alarm 9 are sequentially installed on the outer side wall of the integrated box 1, and an upper mounting cavity 7 and a lower mounting cavity 8 are respectively provided at the top and bottom of the integrated box 1, an upper heat exchange seat 11 is provided on the inner side wall of the upper mounting cavity 7, and a lower heat exchange seat 12 is provided on the inner side wall of the lower mounting cavity 8.

[0024] An emergency battery 3 and a temperature sensor 6 are installed sequentially inside the lower mounting cavity 8. An inverter body 2 is installed inside the upper mounting cavity 7. A third input cable 19 is connected between the inverter body 2 and the emergency battery 3. A first input cable 18 and a second input cable 22 are connected to the inverter body 2 at both ends of the third input cable 19, respectively. Hall current sensors 21 are installed on both the first input cable 18 and the second input cable 22. Circuit electronic switching devices 20 are installed on the first input cable 18, the second input cable 22 and the third input cable 19.

[0025] The inverter body 2 is equipped with an output cable 5 at its output end;

[0026] The outer side wall of the integrated box 1 is provided with wiring holes that match the output cable 5, the first input cable 18, and the second input cable 22 in sequence. An insulating sealant layer is provided between the output cable 5, the first input cable 18, and the second input cable 22 and the wiring holes respectively.

[0027] Specifically, such as Figure 1 , Figure 3 and Figure 5 As shown, the first input cable 18 and the second input cable 22 are respectively passed through the integrated box 1 and connected to the unstable DC power output from the photovoltaic panel and the municipal power grid. In actual operation, the DC power obtained by the distributed photovoltaic system through absorbing solar energy will be converted into AC power that meets the needs of the water pump motor by the inverter body 2, and then delivered to the water pump through the output cable 5. When the photovoltaic system's power is insufficient, such as on cloudy days, the Hall current sensor 21 on the first input cable 18 will detect that the input current is lower than the preset value. At this time, the PLC controller 10 will control the corresponding circuit electronic switch device 20 on the first input cable 18 to close and control the corresponding circuit electronic switch device 20 on the second input cable 22 to open, transmitting the stable current supplied by the municipal power grid to the water pump. If the local municipal power grid also experiences a power outage, the first input cable 18 will be switched off. The Hall current sensor 21 on the first input cable 18 and the second input cable 22 will detect abnormalities. At this time, the PLC controller 10 will directly control the circuit electronic switch device 20 on the third input cable 19 to open, while the circuit electronic switch devices 20 on the first input cable 18 and the second input cable 22 will close. Thus, by setting up three independently controlled input circuits, combined with real-time monitoring of the output current of the photovoltaic system and the municipal power grid, the automatic switching of the input circuit is realized without manual switching operation, which improves the stability of the photovoltaic water pump power supply effect. Furthermore, when the third input cable 19 is opened for use, the PLC controller 10 will simultaneously control the GSM alarm 9 to send an alarm SMS to the back-end staff. This makes it convenient for users to adjust the operation of the water pump irrigation system in a timely manner in response to power outages, which is highly flexible.

[0028] A coolant storage box 4 is fixed on one side of the integrated box 1. A circulation pipe assembly 16 is connected between the coolant storage box 4, the upper heat exchange seat 11 and the lower heat exchange seat 12. A micro water pump 17 and a solenoid valve 13 are installed at the top and bottom of the circulation pipe assembly 16, respectively. A semiconductor cooling chip 15 is installed on the coolant storage box 4.

[0029] The upper mounting cavity 7 and the lower mounting cavity 8 are internally connected, and a sealing cover is movably connected to one side of both the upper mounting cavity 7 and the lower mounting cavity 8.

[0030] A cooling surface is provided on one side of the semiconductor cooling chip 15, which is embedded inside the coolant storage box 4, and a heating surface is provided on the side of the semiconductor cooling chip 15 away from the coolant storage box 4.

[0031] A miniature fan 14 matching the heating surface is installed on the outer wall of the coolant storage box 4 by screws;

[0032] Both the upper heat exchanger 11 and the lower heat exchanger 12 are made of copper alloy, and water passage cavities are provided inside the side walls of both the upper heat exchanger 11 and the lower heat exchanger 12.

[0033] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, temperature sensor 6 monitors and provides real-time feedback on the temperature inside the integrated box 1. When the detected temperature exceeds a preset safety value, PLC controller 10 controls the semiconductor cooling chip 15 to be energized, causing the cooling surface of the semiconductor cooling chip 15 to cool the coolant inside the coolant storage box 4. Meanwhile, the micro fan 14 provides air cooling to the exposed heat-generating surface of the semiconductor cooling chip 15, ensuring that the heat-generating surface does not interfere with the cooling effect due to untimely heating. At the same time, the micro water pump 17 and solenoid valve 13 are activated, which can drive the coolant in the coolant storage box. The heat exchanger 4 continuously circulates between the upper heat exchanger 11 and the lower heat exchanger 12. The upper heat exchanger 11 and the lower heat exchanger 12 are fixed inside the upper mounting cavity 7 and the lower mounting cavity 8, respectively. Through heat conduction and heat exchange, the heat generated inside the integrated box 1 due to the operation of the inverter body 2 and the emergency battery 3 can be displaced. This enables the device to achieve efficient water cooling heat dissipation protection, reducing the efficiency reduction or even failure of the inverter power devices caused by heat generation. Compared with the common fan cooling, this water cooling structure can also prevent dust and debris from the external environment from entering the device and causing pollution.

[0034] The bottom edge of the integrated box 1 is evenly provided with fixing screw holes to facilitate the fixing and installation of the bottom of the integrated box 1 with screws and fixing stakes.

[0035] Working principle: In use, an integrated box 1 with an upper mounting cavity 7 and a lower mounting cavity 8 is set up. The upper mounting cavity 7 and the lower mounting cavity 8 are used to install the inverter body 2 and the emergency battery 3, respectively. This allows the device to integrate emergency power storage function, making it more practical. At the same time, the first input cable 18 and the second input cable 22 are respectively passed through the integrated box 1 and connected to the unstable DC power output from the photovoltaic panel and the municipal power grid. In actual operation, the DC power obtained by the distributed photovoltaic system through absorbing solar energy will be converted into AC power that meets the needs of the water pump motor by the inverter body 2, and then delivered to the water pump through the output cable 5. When the photovoltaic system has insufficient power, such as on cloudy days, the Hall current sensor 21 on the first input cable 18 will detect that the input current is low. At the preset value, the PLC controller 10 will control the corresponding electronic switch 20 on the first input cable 18 to close and the corresponding electronic switch 20 on the second input cable 22 to open, transmitting the stable current supplied by the municipal power grid to the water pump. If the municipal power grid also experiences a power outage, the Hall current sensor 21 on the first input cable 18 and the second input cable 22 will detect the abnormality. At this time, the PLC controller 10 will directly control the electronic switch 20 on the third input cable 19 to open, while the electronic switches 20 on the first input cable 18 and the second input cable 22 will close. Thus, through the setting of three independently controlled input circuits, in conjunction with the photovoltaic system, Real-time monitoring of the municipal power grid output current enables automated switching of the input circuit, eliminating the need for manual switching and improving the stability of the photovoltaic water pump's power supply. Furthermore, when the third input cable 19 is used, the PLC controller 10 simultaneously controls the GSM alarm 9 to send an alarm SMS to the back-end staff. This allows users to promptly adjust the operation of the water pump irrigation system in response to power outages, offering high flexibility. Additionally, the temperature sensor 6 monitors and provides real-time feedback on the temperature inside the integrated box 1. When the temperature exceeds a preset safety value, the PLC controller 10 controls the semiconductor cooling chip 15 to be energized, causing its cooling surface to cool the coolant inside the coolant storage box 4. Meanwhile, the micro fan 14... By using air cooling to dissipate heat from the exposed heat-generating surface of the semiconductor cooling chip 15, the cooling effect is ensured to be maintained even if the heat-generating surface is not heated in time. Simultaneously, the micro water pump 17 and solenoid valve 13 are activated, causing the coolant to circulate continuously between the coolant storage box 4 and the upper and lower heat exchange seats 11 and 12. The upper and lower heat exchange seats 11 and 12 are fixed inside the upper and lower mounting cavities 7 and 8, respectively, and can displace the heat generated inside the integrated box 1 due to the operation of the inverter body 2 and emergency battery 3 through thermal conduction. This enables the device to achieve highly efficient water-cooled heat dissipation protection, mitigating the efficiency reduction or even failure of the inverter power devices caused by heat generation. This water-cooling structure is superior to the more common fan-based cooling system.This also prevents dust and debris from the external environment from entering the device and causing pollution.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A distributed photovoltaic water pump inverter, characterized in that, The system includes an integrated box (1), on which a PLC controller (10) and a GSM alarm (9) are sequentially installed. An upper mounting cavity (7) and a lower mounting cavity (8) are respectively located at the top and bottom of the integrated box (1). An upper heat exchange seat (11) is located on the inner wall of the upper mounting cavity (7), and a lower heat exchange seat (12) is located on the inner wall of the lower mounting cavity (8). An emergency battery (3) and a temperature sensor (6) are sequentially installed inside the lower mounting cavity (8). An inverter body (2) is installed inside the upper mounting cavity (7). A third input cable (19) connects the inverter body (2) and the emergency battery (3). The inverter body (2) has two ends connected to the third input cable (19). The first input cable (18) and the second input cable (22) are connected. Hall current sensors (21) are installed on the first input cable (18) and the second input cable (22). Circuit electronic switching devices (20) are installed on the first input cable (18), the second input cable (22) and the third input cable (19). A coolant storage box (4) is fixed on one side of the integrated box (1). A circulation pipe group (16) is connected between the coolant storage box (4), the upper heat exchange seat (11) and the lower heat exchange seat (12). A micro water pump (17) and a solenoid valve (13) are installed at the top and bottom of the circulation pipe group (16) respectively. A semiconductor refrigeration chip (15) is installed on the coolant storage box (4).

2. The distributed photovoltaic water pump inverter according to claim 1, characterized in that: The upper mounting cavity (7) and the lower mounting cavity (8) are connected internally, and a sealing cover is movably connected to one side of both the upper mounting cavity (7) and the lower mounting cavity (8).

3. A distributed photovoltaic water pump inverter according to claim 1, characterized in that: The semiconductor refrigeration chip (15) has a cooling surface embedded in the coolant storage box (4) on one side, and a heating surface is provided on the side of the semiconductor refrigeration chip (15) away from the coolant storage box (4).

4. A distributed photovoltaic water pump inverter according to claim 3, characterized in that: The outer wall of the coolant storage box (4) is fitted with a miniature fan (14) that matches the heating surface by screws.

5. A distributed photovoltaic water pump inverter according to claim 1, characterized in that: The upper heat exchange seat (11) and the lower heat exchange seat (12) are both made of copper alloy, and water passage cavities are provided inside the side walls of the upper heat exchange seat (11) and the lower heat exchange seat (12).

6. A distributed photovoltaic water pump inverter according to claim 1, characterized in that: The integrated box (1) has evenly spaced screw holes at the bottom edge.

7. A distributed photovoltaic water pump inverter according to claim 1, characterized in that: The inverter body (2) is equipped with an output cable (5) at its output end.

8. A distributed photovoltaic water pump inverter according to claim 7, characterized in that: The outer wall of the integrated box (1) is provided with wiring holes that match the output cable (5), the first input cable (18), and the second input cable (22). An insulating sealant layer is provided between the output cable (5), the first input cable (18), and the second input cable (22) and the wiring holes respectively.

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