An irrigation control system

Abstract

This utility model discloses an irrigation control system, including a photovoltaic panel, a photovoltaic charging and storage inverter, an energy storage battery pack, a frequency converter, a main control board, a flow meter, a water pump, and a control cabinet. The photovoltaic panel is connected to the PV terminal of the photovoltaic charging and storage inverter. The B terminal of the photovoltaic charging and storage inverter is connected to the energy storage battery pack, and the AC OUT terminal is connected to the frequency converter. The frequency converter is connected to the water pump, and the flow meter is connected to the water pump outlet. The main control board is connected to the photovoltaic charging and storage inverter, the frequency converter, and the flow meter via a bus and is equipped with a communication module. The system can utilize photovoltaic power for power supply and energy storage, intelligently adjust the water pump speed through the main control board, measure the irrigation flow, and is equipped with circuit breakers, relays, etc., to ensure safety. It supports remote monitoring and card-swipe control. This utility model solves the problems of traditional irrigation relying on mains power and inefficient control, realizing energy-saving and intelligent irrigation, and is suitable for agricultural, landscaping, and other scenarios.

Description

Technical Field

[0001] This utility model relates to the field of irrigation technology, specifically to an irrigation control system. Background Technology

[0002] Traditional irrigation systems have many limitations in irrigation operations in agriculture, landscaping and other fields. On the one hand, irrigation equipment that relies on grid power is limited by the coverage of the power grid and is difficult to deploy in remote areas without electricity, and the long-term electricity cost is high. On the other hand, irrigation control is mostly manual or simple timed control, which cannot be intelligently adjusted according to actual water demand and energy supply status, which easily leads to waste of water resources and electricity.

[0003] With the development of photovoltaic technology, solar irrigation systems are gradually being applied. However, existing photovoltaic irrigation systems generally suffer from low energy utilization efficiency. The storage and distribution of photovoltaic power lack intelligent control. When there is sufficient sunlight, excess power is not effectively stored, and when there is insufficient sunlight, the power supply cannot be stable. At the same time, the system's control function is limited, and it can only start and stop the water pump. It lacks accurate monitoring of irrigation flow and equipment status, and it does not have the ability to remotely manage and intelligently schedule.

[0004] In addition, traditional irrigation systems have low electrical integration and scattered components, which not only makes installation and maintenance inconvenient but also poses risks of circuit interference and insufficient protection. At the user level, they lack a flexible access control mechanism, making it difficult to meet the needs of different users for time-sharing irrigation and metered payment. Utility Model Content

[0005] The purpose of this utility model is to provide an irrigation control system that solves the problems of existing irrigation systems, such as reliance on mains power, inefficient energy utilization, limited control functions, lack of monitoring and remote management, and low electrical integration.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: an irrigation control system, comprising: a photovoltaic panel for converting solar energy into electrical energy; Photovoltaic charging and storage inverters are used to convert electrical energy from photovoltaic panels or energy storage battery packs into alternating current. Energy storage battery packs are used to store electrical energy; A variable frequency drive (VFD) is used to adjust the speed of a water pump. The main control board is used for centralized control of the system and is equipped with a communication module to communicate with the backend server. Flow meters are used to measure irrigation flow. Water pumps are used to provide power for irrigation; The control cabinet is used to integrate and install photovoltaic charging and storage inverters, energy storage battery packs, frequency converters, main control boards, flow meters, and water pumps. The output terminal of the photovoltaic panel is electrically connected to the PV terminal of the photovoltaic charging and storage inverter, the B terminal of the photovoltaic charging and storage inverter is electrically connected to the energy storage battery pack, and the AC OUT terminal of the photovoltaic charging and storage inverter is connected to the frequency converter.

[0007] The input terminal of the device is electrically connected; the output terminal of the variable frequency drive is electrically connected to the water pump; one end of the flow meter is connected to the outlet of the water pump, and the other end of the flow meter forms the system outlet; the main control board is connected to the photovoltaic charging and storage inverter, the variable frequency drive, and the flow meter via bus signals.

[0008] As a preferred embodiment of the irrigation control system, the control cabinet is equipped with a circuit breaker QF2, which is connected in series in the circuit between the AC OUT terminal of the photovoltaic charging and storage inverter and the input terminal of the variable frequency drive. The circuit breaker QF2 is used to control the power supply circuit of the variable frequency drive.

[0009] As a preferred solution for the irrigation control system, the control cabinet is equipped with a relay KA2. The coil end of the relay KA2 is connected to the main control board, and the contact end of the relay KA2 is connected to the control end of the photovoltaic charging and storage inverter. The main control board controls the photovoltaic charging and storage inverter by controlling the on and off of the relay KA2.

[0010] As a preferred embodiment of the irrigation control system, the control cabinet is equipped with a contactor KM1. The main contacts of the contactor KM1 are connected in series in the circuit between the output terminal of the frequency converter and the water pump. The coil terminal of the contactor KM1 is connected to the main control board for signal connection. The main control board realizes the indirect on / off control of the water pump power supply circuit by controlling the on / off state of the coil of the contactor KM1.

[0011] As a preferred embodiment of the irrigation control system, the control cabinet is equipped with a circuit breaker QF4, which is connected in series in the circuit between the photovoltaic panel and the PV terminal of the photovoltaic charging and storage inverter. The circuit breaker QF4 is used to control the power supply from the photovoltaic panel to the photovoltaic charging and storage inverter.

[0012] As a preferred embodiment of the irrigation control system, the control cabinet is equipped with a card reader. The power supply terminal of the card reader is electrically connected to the output terminal of the circuit breaker QF3 in the control cabinet, and the signal terminal of the card reader is connected to the signal of the main control board.

[0013] As a preferred solution for the irrigation control system, the control cabinet is equipped with indicator lights L1-G and L2-R. Indicator light L1-G is electrically connected to the AC OUT terminal of the photovoltaic charging and storage inverter and is used to indicate the system power supply status. Indicator light L2-R is electrically connected to the auxiliary contact terminal of contactor KM1 and is used to indicate the operating status of the water pump.

[0014] As a preferred solution for the irrigation control system, the photovoltaic charging and storage inverter has a reserved AC IN interface, which is used to connect to an external AC power source for extended power supply; the input terminal of the frequency converter is an AC220V interface, and the output terminal of the frequency converter is an AC380V three-phase interface that is electrically connected to the water pump.

[0015] As a preferred solution for the irrigation control system, the signal terminal of the flow meter is connected to the 485 bus via a terminal block to transmit the flow signal to the main control board.

[0016] As a preferred solution for the irrigation control system, the output circuit of the photovoltaic panel is equipped with anti-reverse diodes D1 and D2 to prevent current from flowing back in the opposite direction.

[0017] The beneficial effects of this utility model are as follows: Through the synergy of photovoltaic panels, photovoltaic charging and storage inverters, and energy storage battery packs, efficient conversion, storage, and on-demand distribution of solar energy are achieved, eliminating dependence on mains power and ensuring stable power supply even in remote areas, significantly reducing long-term electricity costs, while maximizing the utilization of photovoltaic energy and reducing energy waste. The main control board centrally controls components such as the photovoltaic charging and storage inverter, frequency converter, and flow meter. Combined with bus signal connections, it can monitor irrigation flow and equipment operating status in real time, intelligently adjust pump speed, and achieve on-demand irrigation, improving irrigation accuracy and avoiding ineffective consumption of water resources and electricity. All electrical components are integrated into the control cabinet, with separate wiring for high and low voltage circuits, resulting in a reasonable layout that facilitates installation, maintenance, and repair. It is also equipped with a communication module to support remote management, allowing real-time monitoring of system status and remote start / stop of equipment, significantly reducing the on-site workload of maintenance personnel. The inclusion of electrical components such as circuit breakers, relays, contactors, and reverse-biased diodes enables on / off control, overcurrent protection, and reverse backflow prevention for each circuit, ensuring stable and safe system operation under various conditions. Indicator lights facilitate intuitive monitoring of system status and timely fault detection. The photovoltaic charging / storage inverter has a reserved AC IN interface, and the control cabinet includes pre-installed wiring terminals and expansion interfaces, providing possibilities for future connection to external AC power and expansion of new equipment or functions, meeting users' long-term functional expansion needs. The card reader enables card-swipe start / stop control, providing flexible access management for different users' time-sharing irrigation and metered payment, enhancing user convenience and autonomy. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0020] Figure 1 is a schematic diagram of the irrigation control system provided in the embodiment of this utility model.

[0021] Figure 2 is a schematic diagram of the control cabinet structure of the irrigation control system provided in the embodiment of this utility model.

[0022] In the diagram: 1. Photovoltaic panel; 2. Photovoltaic charging and storage inverter; 3. Energy storage battery pack; 4. Variable frequency drive; 5. Main control board; 6. Flow meter; 7. Water pump; 8. Control cabinet; 9. Card reader. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] Referring to Figures 1 and 2, this embodiment of the utility model provides an irrigation control system, including: a photovoltaic panel 1 for converting solar energy into electrical energy; a photovoltaic charging and storage inverter 2 for converting the electrical energy from the photovoltaic panel 1 or the energy storage battery pack 3 into alternating current; an energy storage battery pack 3 for storing electrical energy; a frequency converter 4 for adjusting the speed of a water pump 7; a main control board 5 for centralized control of the system, equipped with a communication module for communicating with a backend server; a flow meter 6 for measuring irrigation flow; a water pump 7 for providing irrigation power; and a control cabinet 8 for integrating the photovoltaic charging and storage inverter 2, the energy storage battery pack 3, the frequency converter 4, the main control board 5, the flow meter 6, and the water pump 7; the output terminal of the photovoltaic panel 1 is electrically connected to the PV terminal of the photovoltaic charging and storage inverter 2, the B terminal of the photovoltaic charging and storage inverter 2 is electrically connected to the energy storage battery pack 3, and the AC terminal of the photovoltaic charging and storage inverter 2 is electrically connected to the AC terminal of the photovoltaic charging and storage inverter 2. The OUT terminal is electrically connected to the input terminal of the variable frequency drive 4; the output terminal of the variable frequency drive 4 is electrically connected to the water pump 7; one end of the flow meter 6 is connected to the outlet of the water pump 7, and the other end of the flow meter 6 forms the system outlet; the main control board 5 is connected to the photovoltaic charging and storage inverter 2, the variable frequency drive 4, and the flow meter 6 respectively via bus signals.

[0026] Specifically, photovoltaic panel 1, as the energy input, converts solar energy into DC power. Photovoltaic charging and storage inverter 2 performs dual functions of conversion and energy storage control; it can convert the DC power output from photovoltaic panel 1 into AC power for the load, and also store excess energy in energy storage battery pack 3 to avoid energy waste during periods of sufficient sunlight. Energy storage battery pack 3 releases energy during periods of insufficient sunlight to ensure continuous system operation. Variable frequency drive 4 adjusts the output frequency according to instructions from main control board 5, thereby changing the speed of water pump 7 and achieving precise control of irrigation water volume. Flow meter 6 collects real-time water flow data from water pump 7 and transmits it to main control board 5 via bus, providing a basis for main control board 5 to determine whether irrigation has reached the required threshold. Control cabinet 8 integrates all core components, reducing installation and maintenance difficulties and signal interference problems caused by dispersed layouts. Main control board 5 establishes signal connections with each component via bus to achieve centralized monitoring and control. With a communication module, it can upload system status to the backend server and receive backend instructions, forming remote management capabilities.

[0027] In this embodiment, the control cabinet 8 is equipped with a circuit breaker QF2. The circuit breaker QF2 is connected in series in the circuit between the AC OUT terminal of the photovoltaic charging and storage inverter 2 and the input terminal of the variable frequency drive 4. The circuit breaker QF2 is used to control the on / off of the power supply circuit of the variable frequency drive 4.

[0028] Specifically, under normal operating conditions, when closed, circuit breaker QF2 stably delivers the AC220V power output from photovoltaic charging and storage inverter 2 to frequency converter 4, providing it with operating power. When the circuit current of frequency converter 4 exceeds the rated protection current of circuit breaker QF2 due to an internal fault, circuit breaker QF2 will automatically trip to disconnect the circuit, cutting off the power supply to frequency converter 4, preventing the fault from spreading to photovoltaic charging and storage inverter 2. It also facilitates maintenance personnel to disconnect the power supply by disconnecting circuit breaker QF2 when inspecting frequency converter 4, ensuring maintenance safety.

[0029] In this embodiment, the control cabinet 8 is equipped with a relay KA2. The coil end of the relay KA2 is connected to the main control board 5, and the contact end of the relay KA2 is connected to the control end of the photovoltaic charging and storage inverter 2. The main control board 5 controls the photovoltaic charging and storage inverter 2 by controlling the on and off of the relay KA2.

[0030] Specifically, since the control signals output by the main control board 5, such as the start / stop commands for the photovoltaic charging and storage inverter 2 and the energy storage mode switching commands, are usually low-voltage, low-current signals, they cannot directly drive the control terminal of the photovoltaic charging and storage inverter 2. Therefore, the main control board 5 outputs an electrical signal to the KA2 coil terminal to control the coil to be energized or de-energized. When the coil is energized, the KA2 contacts close, connecting the circuit of the control terminal of the photovoltaic charging and storage inverter 2 and triggering the corresponding control action; when the coil is de-energized, the contacts open, terminating the control action. At the same time, the mechanical contacts of KA2 can achieve electrical isolation between the low-voltage control circuit of the main control board 5 and the high-voltage control circuit of the photovoltaic charging and storage inverter 2, preventing interference or faults in the high-voltage circuit from affecting the normal operation of the main control board 5.

[0031] In this embodiment, the control cabinet 8 is equipped with a contactor KM1. The main contacts of the contactor KM1 are connected in series in the circuit between the output terminal of the frequency converter 4 and the water pump 7. The coil terminal of the contactor KM1 is connected to the main control board 5. The main control board 5 realizes the indirect on / off control of the power supply circuit of the water pump 7 by controlling the on / off of the coil of the contactor KM1.

[0032] Specifically, contactor KM1 is suitable for power supply control of high-power loads such as water pump 7. Its main contacts are capable of carrying large currents, while the coil only requires a small current signal for control. During normal operation, the main control board 5 outputs an energizing signal to the KM1 coil. The coil generates electromagnetic attraction, causing the main contacts to close. The AC380V three-phase power output from the frequency converter 4 is then delivered to the water pump 7 through the main contacts, driving the water pump 7 to operate. When it is necessary to stop the water pump 7 or when the system detects a fault, the main control board 5 cuts off the power supply to the coil. The electromagnetic attraction of the coil disappears, and the main contacts open under the action of the spring, cutting off the power supply circuit to the water pump 7 and stopping the water pump 7. Compared to directly controlling the power supply to the water pump 7 through the main control board 5, KM1 avoids the impact of large currents on the main control board 5. At the same time, the switching capability of the main contacts is more suitable for the power requirements of the water pump 7, ensuring circuit stability.

[0033] In this embodiment, the control cabinet 8 is equipped with a circuit breaker QF4, which is connected in series in the circuit between the photovoltaic panel 1 and the PV terminal of the photovoltaic charging and storage inverter 2. The circuit breaker QF4 is used to control the power supply from the photovoltaic panel 1 to the photovoltaic charging and storage inverter 2.

[0034] Specifically, circuit breaker QF4 is a protective component for the DC power supply circuit of photovoltaic panel 1. The electrical energy output by photovoltaic panel 1 is DC, and its circuit current changes with the intensity of sunlight. When a short circuit occurs in the circuit or an overcurrent is caused by a fault at the input terminal of photovoltaic charging and storage inverter 2, QF4 will automatically trip according to the preset protection threshold, disconnecting the connection between photovoltaic panel 1 and inverter to prevent overcurrent damage to photovoltaic panel 1 or inverter. In addition, when installing or repairing photovoltaic panel 1 or photovoltaic charging and storage inverter 2, maintenance personnel can manually disconnect QF4 to de-energize the relevant components, avoid the risk of electric shock, and ensure operational safety.

[0035] In this embodiment, the control cabinet 8 is equipped with a card reader 9. The power supply terminal of the card reader 9 is electrically connected to the output terminal of the circuit breaker QF3 in the control cabinet 8, and the signal terminal of the card reader 9 is connected to the main control board 5.

[0036] Specifically, the power supply of card reader 9 is obtained through circuit breaker QF3. QF3 can trip to protect card reader 9 in case of short circuit or overload, preventing impact on other circuits. When a user brings an authorized card close to card reader 9, card reader 9 reads the card information and converts it into an electrical signal, which is then transmitted to main control board 5. Main control board 5 verifies the card information. If the verification is successful, main control board 5 can execute preset actions, such as allowing the water pump 7 to start or unlocking irrigation permissions; if the verification fails, operation is refused, preventing unauthorized personnel from using the system at will. This also facilitates the implementation of functions such as time-sharing irrigation and metered payment, improving the flexibility and security of system use.

[0037] In this embodiment, the control cabinet 8 is equipped with indicator lights L1-G and L2-R. Indicator light L1-G is electrically connected to the AC OUT terminal of the photovoltaic charging and storage inverter 2 and is used to indicate the power supply status of the system. Indicator light L2-R is electrically connected to the auxiliary contact terminal of contactor KM1 and is used to indicate the operating status of water pump 7.

[0038] Specifically, the indicator lights provide intuitive light signals to reflect the key status of the system, allowing maintenance personnel to quickly assess the system's operating condition. L1-G is directly connected to the AC OUT terminal of the photovoltaic charging and storage inverter 2. When the inverter is outputting AC220V normally, L1-G illuminates, indicating that the system's power supply circuit is normal. If L1-G is off, the fault can be quickly located, such as the inverter not starting or the AC OUT terminal line being disconnected. L2-R is connected to the auxiliary contact of KM1. When the main contact of KM1 is closed, its auxiliary contact closes simultaneously, illuminating L2-R and indicating that water pump 7 is running. When the main contact of KM1 is open, water pump 7 stops, the auxiliary contact opens, and L2-R turns off. The on / off status of L2-R directly indicates whether water pump 7 is running, eliminating the need for additional testing of the water pump itself and improving troubleshooting efficiency.

[0039] In this embodiment, the photovoltaic charging and storage inverter 2 is provided with an AC IN interface, which is used to connect to an external AC power source for extended power supply; the input terminal of the frequency converter 4 is an AC220V interface, and the output terminal of the frequency converter 4 is an AC380V three-phase interface that is electrically connected to the water pump 7.

[0040] Specifically, the reserved AC IN interface in the photovoltaic charging and storage inverter 2 is to cope with extreme low-light scenarios. When the power generation of the photovoltaic panel 1 and the power of the energy storage battery pack 3 are insufficient to meet the system requirements, external AC power such as mains power can be connected through the AC IN interface to supply power to the system, avoiding interruption of irrigation operations and improving system reliability. The AC220V input and AC380V three-phase output configuration of the frequency converter 4 are adapted to the power supply of the system and the power requirements of the water pump 7. The AC220V power output of the photovoltaic charging and storage inverter 2 can be directly connected to the input terminal of the frequency converter 4 to meet its operating power requirements; The water pump 7 is usually a three-phase asynchronous motor, which requires AC380V three-phase power to drive. Therefore, the frequency converter 4 converts AC220V single-phase power to AC380V three-phase power output. At the same time, it changes the motor speed by adjusting the output frequency, thereby realizing the regulation of the water pump 7 flow rate, taking into account both power supply adaptability and control precision.

[0041] In this embodiment, the signal terminal of the flow meter 6 is connected to the 485 bus through a terminal block to transmit the flow signal to the main control board 5.

[0042] Specifically, flow meter 6 is used to collect real-time flow data during irrigation. Its output signal is typically a 4-20mA analog or digital signal, which needs to be connected to the 485 bus via a terminal block. The terminal block serves as a line adapter and fixation point, facilitating connection and maintenance of flow meter 6 to the bus. The 485 bus has strong anti-interference capabilities and long transmission distances, ensuring stable transmission of the flow signal to the main control board 5 and preventing data distortion due to electrical interference during transmission. After receiving the signal, the main control board 5 converts it into readable data such as instantaneous flow and cumulative flow using internal algorithms. This data is used for real-time monitoring of irrigation volume and as a basis for determining whether a preset irrigation threshold has been reached, thus achieving precise irrigation.

[0043] In this embodiment, the output circuit of the photovoltaic panel 1 is equipped with anti-reverse diodes D1 and D2 to prevent current from flowing back in the opposite direction.

[0044] Specifically, the anti-reverse diode has unidirectional conductivity, allowing current to flow only from the output terminal of photovoltaic panel 1 to the photovoltaic charging and storage inverter 2, preventing current from flowing in the opposite direction. In actual operation, when the light intensity weakens and the output voltage of photovoltaic panel 1 is lower than the voltage of energy storage battery pack 3, if the anti-reverse diode is not installed, the electrical energy of energy storage battery pack 3 may flow back into photovoltaic panel 1, causing photovoltaic panel 1 to overheat and be damaged, while wasting energy storage energy. However, D1 and D2 are connected in series in the output circuit of photovoltaic panel 1, which can effectively block the reverse current, ensuring the safety of photovoltaic panel 1 and energy storage battery pack 3, while ensuring that the electrical energy output by photovoltaic panel 1 is only delivered to the inverter or energy storage battery pack 3, improving energy utilization efficiency.

[0045] The working principle of this utility model is as follows: the photovoltaic panel 1 receives solar energy and converts it into DC power, which is then transmitted to the PV terminal of the photovoltaic charging and storage inverter 2 through the output terminal to provide basic green energy for the system; if there is a risk of reverse current in the output circuit of the photovoltaic panel 1 (such as the photovoltaic voltage being lower than the energy storage battery voltage due to reduced light), the anti-reverse diodes D1 and D2 in the circuit will block the reverse current to avoid damage to the photovoltaic panel 1 and waste of power. The photovoltaic charging and storage inverter 2 converts the DC power input from the photovoltaic panel 1 into AC220V AC power, directly supplying power to loads such as the frequency converter 4 and the main control board 5. On the other hand, when there is sufficient sunlight and surplus electricity, the photovoltaic charging and storage inverter 2 charges the energy storage battery pack 3 through its B terminal to store the excess electricity. If there is insufficient sunlight (such as on a cloudy day), it switches to the energy storage battery pack 3 power supply mode, where the energy storage battery converts the AC power to AC220V AC power through the inverter to ensure continuous system operation. In extreme cases, external AC power can also be connected through the ACIN interface reserved in the photovoltaic charging and storage inverter 2 to further improve power supply reliability.

[0046] The system uses multiple circuit breakers to ensure safe switching of each circuit. Circuit breaker QF4 controls the DC power supply circuit from photovoltaic panel 1 to the inverter, QF2 controls the AC220V power supply circuit from the inverter to the frequency converter 4, and QF3 provides separate power to card reader 9. Each circuit breaker can automatically trip in case of circuit overload or short circuit to protect the equipment. If irrigation needs to be started, the user can swipe a card through card reader 9 on control cabinet 8. After reading the authorization information, card reader 9 transmits it to main control board 5. After verification by main control board 5, the subsequent control process is started. The main control board 5 sends control commands to the variable frequency drive 4 via the bus. The variable frequency drive 4 converts the AC220V input power into AC380V three-phase AC power and adjusts the output frequency according to the command. At the same time, the main control board 5 controls the coil of contactor KM1 to be energized, so that the main contacts of KM1 are closed. The three-phase power output by the variable frequency drive 4 is transmitted to the water pump 7 through the main contacts, driving the water pump 7 to run. By changing the output frequency of the variable frequency drive 4, the speed of the water pump 7 can be adjusted, thereby controlling the irrigation flow and realizing irrigation on demand.

[0047] Flow meter 6 is installed at the outlet of water pump 7 to collect irrigation flow data in real time. It is connected to the 485 bus through the wiring terminal and transmits the flow signal to the main control board 5. The main control board 5 also interacts with photovoltaic charging and storage inverter 2 and frequency converter 4 through the 485 bus to obtain key parameters such as photovoltaic power, energy storage battery power, water pump 7 operating frequency and current. In addition, the auxiliary contact of contactor KM1 is linked with indicator light L2-R. When water pump 7 is running, the auxiliary contact closes and L2-R lights up, which provides intuitive feedback on the status of water pump 7. Indicator light L1-G connected to the AC OUT terminal of the inverter indicates whether the system power supply is normal by turning it on and off.

[0048] The main control board 5 analyzes and processes the collected data such as flow rate, power consumption, and equipment status. If the cumulative irrigation volume reaches a preset threshold or a device malfunction is detected, it will automatically send commands, such as cutting off the power supply to the KM1 coil to stop the water pump 7, or adjusting the frequency of the variable frequency drive 4 to change the flow rate. Simultaneously, the main control board 5 uploads all data to the backend server via the communication module. Users can remotely view the system status through the backend webpage or mobile APP, and can also issue remote start / stop and threshold setting commands, achieving intelligent and convenient irrigation. The system uses indicator lights to intuitively indicate the direction of the fault; for example, L1-G not lighting indicates a power supply fault, and L2-R abnormally lighting indicates a water pump 7 control fault. The main control board 5 will also upload the fault information to the backend, facilitating quick problem location by maintenance personnel. Furthermore, all electrical components are integrated within the control cabinet 8, with separate wiring for high and low voltage circuits, reducing signal interference and simplifying installation and maintenance.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An irrigation control system, characterized by, include: Photovoltaic panels (1) are used to convert solar energy into electrical energy; A photovoltaic charging and storage inverter (2) is used to convert the electrical energy of a photovoltaic panel (1) or a storage battery pack (3) into alternating current. Energy storage battery pack (3) is used to store electrical energy; A variable frequency drive (4) is used to adjust the speed of the water pump (7); The main control board (5) is used for centralized control of the system and is equipped with a communication module to communicate with the back-end server; Flow meter (6) is used to measure irrigation flow; Water pump (7) is used to provide irrigation power; The control cabinet (8) is used to integrate and install the photovoltaic charging and storage inverter (2), the energy storage battery pack (3), the frequency converter (4), the main control board (5), the flow meter (6) and the water pump (7); The output terminal of the photovoltaic panel (1) is electrically connected to the PV terminal of the photovoltaic charging and storage inverter (2), the B terminal of the photovoltaic charging and storage inverter (2) is electrically connected to the energy storage battery pack (3), and the AC OUT terminal of the photovoltaic charging and storage inverter (2) is electrically connected to the input terminal of the variable frequency drive (4). The output terminal of the variable frequency drive (4) is electrically connected to the water pump (7). One end of the flow meter (6) is connected to the outlet of the water pump (7), and the other end of the flow meter (6) forms the system outlet. The main control board (5) is connected to the photovoltaic charging and storage inverter (2), the variable frequency drive (4), and the flow meter (6) respectively via bus signals.

2. The irrigation control system of claim 1, wherein, The control cabinet (8) is equipped with a circuit breaker QF2, which is connected in series in the circuit between the AC OUT terminal of the photovoltaic charging and storage inverter (2) and the input terminal of the variable frequency speed controller (4). The circuit breaker QF2 is used to switch the power supply circuit of the variable frequency speed controller (4).

3. The irrigation control system according to claim 1, characterized in that, The control cabinet (8) is equipped with a relay KA2. The coil end of the relay KA2 is connected to the main control board (5) for signal connection. The contact end of the relay KA2 is connected to the control end of the photovoltaic charging and storage inverter (2). The main control board (5) controls the photovoltaic charging and storage inverter (2) by controlling the on and off of the relay KA2.

4. The irrigation control system according to claim 1, characterized in that, The control cabinet (8) is equipped with a contactor KM1. The main contacts of the contactor KM1 are connected in series in the circuit between the output end of the variable frequency speed controller (4) and the water pump (7). The coil end of the contactor KM1 is connected to the main control board (5) for signal connection. The main control board (5) realizes the indirect on / off control of the power supply circuit of the water pump (7) by controlling the on / off of the coil of the contactor KM1.

5. The irrigation control system according to claim 1, characterized in that, The control cabinet (8) is equipped with a circuit breaker QF4, which is connected in series in the circuit between the photovoltaic panel (1) and the PV terminal of the photovoltaic charging and storage inverter (2). The circuit breaker QF4 is used to control the power supply from the photovoltaic panel (1) to the photovoltaic charging and storage inverter (2).

6. The irrigation control system according to claim 1, characterized in that, The control cabinet (8) is equipped with a card reader (9). The power supply terminal of the card reader (9) is electrically connected to the output terminal of the circuit breaker QF3 in the control cabinet (8). The signal terminal of the card reader (9) is connected to the main control board (5).

7. The irrigation control system according to claim 1, characterized in that, The control cabinet (8) is equipped with indicator lights L1-G and L2-R. Indicator light L1-G is electrically connected to the AC OUT terminal of the photovoltaic charging and storage inverter (2). Indicator light L1-G is used to indicate the power supply status of the system. Indicator light L2-R is electrically connected to the auxiliary contact terminal of contactor KM1. Indicator light L2-R is used to indicate the operating status of water pump (7).

8. The irrigation control system according to claim 1, characterized in that, The photovoltaic charging and storage inverter (2) has a reserved AC IN interface, which is used to connect to external AC power for extended power supply. The input terminal of the variable frequency drive (4) is an AC 220V interface, and the output terminal of the variable frequency drive (4) is an AC 380V three-phase interface and is electrically connected to the water pump (7).

9. The irrigation control system according to claim 1, characterized in that, The signal terminal of the flow meter (6) is connected to the 485 bus through the terminal block to transmit the flow signal to the main control board (5).

10. The irrigation control system according to claim 1, characterized in that, The output circuit of the photovoltaic panel (1) is equipped with anti-reverse diodes D1 and D2 to prevent current from flowing back in the opposite direction.

Images