Water and fertilizer device and water and fertilizer control system

Abstract

The invention provides a water and fertilizer device and a water and fertilizer control system, and relates to the technical field of water and fertilizer machines. The water and fertilizer device comprises an electric control unit, a fertilizer injection control unit, a sensing detection unit, a water and fertilizer mixing unit and a water and fertilizer main pipeline, the fertilizer injection control unit comprises at least one gear pump which is electrically connected with the electric control unit, and the gear pump injects fertilizer liquid in an external fertilizer liquid device into the water and fertilizer main pipeline under the control of the electric control unit to obtain water and fertilizer mixed liquid; the sensing detection unit is arranged on the water and fertilizer main pipeline and electrically connected with the electric control unit, and the sensing detection unit detects characteristic parameter information of the water and fertilizer mixed liquid and sends the characteristic parameter information to the electric control unit, so that the electric control unit controls the gear pump according to the characteristic parameter information; the water-fertilizer mixing unit is arranged on the water-fertilizer main pipeline and used for mixing water-fertilizer mixed liquid, and the output end of the water-fertilizer main pipeline outputs the mixed water-fertilizer mixed liquid.

Description

Technical Field

[0001] This application relates to the technical field of water and fertilizer machines, and more specifically, to a water and fertilizer device and a water and fertilizer control system. Background Technology

[0002] A fertigation system is an agricultural technology that integrates irrigation and fertilization. It mixes soluble solid or liquid fertilizers according to soil nutrient content and crop nutrient requirements to form a fertilizer solution, which is then supplied along with irrigation water through a controllable pipeline system.

[0003] Current fertigation systems generally use the Venturi effect to mix fertilizer and water. For example, a Venturi fertilizer applicator draws in fertilizer and mixes it with water by creating negative pressure through the throat of the water flow.

[0004] However, the inventors of this application discovered that the Venturi fertilizer applicator is a discrete fertilizer injection method, that is, it achieves discontinuous fertilizer injection through PWM (Pulse Width Modulation) frequency control, which has the problem of discontinuous fertilizer injection.

[0005] On the other hand, fertilization based on the Venturi effect generally requires a peristaltic pump to provide pumping force. However, peristaltic pumps generally have a small flow rate and a large internal resistance. Under the requirement of high flow rate, the speed of the peristaltic pump needs to be increased, but the high speed will reduce the life of the peristaltic pump hose. In addition, the maximum working pressure that the peristaltic pump can withstand is limited (e.g., the working pressure cannot exceed 1 kg), so it is necessary to configure a corresponding pressure reducing pipeline, which will also increase the complexity of the water and fertilizer device structure. Summary of the Invention

[0006] According to one aspect of this application, a water-fertilizer device is provided, comprising: an electrical control unit, a fertilizer injection control unit, a sensor detection unit, a water-fertilizer mixing unit, and a water-fertilizer main pipeline; the fertilizer injection control unit includes: at least one gear pump electrically connected to the electrical control unit, the gear pump injecting fertilizer solution from an external fertilizer solution device into the water-fertilizer main pipeline under the control of the electrical control unit to obtain a water-fertilizer mixture; the sensor detection unit is disposed on the water-fertilizer main pipeline and electrically connected to the electrical control unit, the sensor detection unit detects characteristic parameter information of the water-fertilizer mixture and sends the characteristic parameter information to the electrical control unit, so that the electrical control unit controls the gear pump according to the characteristic parameter information; the water-fertilizer mixing unit is disposed on the water-fertilizer main pipeline for mixing the water-fertilizer mixture, and the output end of the water-fertilizer main pipeline outputs the mixed water-fertilizer mixture.

[0007] According to some embodiments of this application, the main water and fertilizer pipeline includes an input end and an output end, and the water and fertilizer device further includes a pressure control unit. The pressure control unit includes: a first pressure detector, which is installed at the input end to detect a first liquid pressure value at the input end; a second pressure detector, which is installed at the output end to detect a second liquid pressure value at the output end; and a power control module, which controls the flow rate of the liquid at the input end according to the first liquid pressure value and / or the second liquid pressure value, so as to control the pressure difference of the water and fertilizer mixture.

[0008] According to some embodiments of this application, the water and fertilizer device further includes a pressure relief unit, which is installed on the main water and fertilizer pipeline to discharge air from the main water and fertilizer pipeline.

[0009] According to some embodiments of this application, the electrical control unit includes: a control motherboard that generates control commands based on characteristic parameter information and preset target values; and a drive controller that is electrically connected to the control motherboard and drives a gear pump according to the control commands.

[0010] According to some embodiments of this application, the sensing and detection unit includes: a conductivity sensor, disposed at the output end of the water-fertilizer mixing unit, for detecting the conductivity information of the water-fertilizer mixture; and a pH sensor, disposed at the output end of the water-fertilizer mixing unit, for detecting the pH information of the water-fertilizer mixture.

[0011] According to some embodiments of this application, the conductivity detection sensor is set at a first angle to the main water and fertilizer pipeline, and the pH detection sensor is set at a second angle to the main water and fertilizer pipeline; the range of the first angle is 30° to 45°, and the range of the second angle is 30° to 45°.

[0012] According to some embodiments of this application, the electric control unit further includes: an air intake module disposed on one side of the electric control unit; an exhaust module disposed on one side of the electric control unit and disposed on the same side as the air intake module; and a heat dissipation module disposed on one side of the electric control unit, wherein a heat dissipation air duct is formed between the air intake module and the exhaust module under the action of the heat dissipation module.

[0013] According to some embodiments of this application, the water and fertilizer device further includes: a fixed unit, an electrical control unit, a fertilizer injection control unit, a sensor detection unit, a water and fertilizer mixing unit, and a water and fertilizer main pipeline integrated within the fixed unit.

[0014] According to some embodiments of this application, the fixing unit includes a first fixing unit and a second fixing unit; an electrical control unit and a fertilizer injection control unit are disposed on the first fixing unit; a sensing and detection unit, a water and fertilizer mixing unit and a water and fertilizer main pipeline are disposed on the second fixing unit; wherein, the first fixing unit and the second fixing unit are detachably connected.

[0015] According to another aspect of this application, this application also provides a water and fertilizer control system, including a remote control terminal and the water and fertilizer device described above, wherein the remote control terminal and the water and fertilizer device are communicatively connected to remotely control the water and fertilizer device.

[0016] The water and fertilizer device provided in this application includes an electrical control unit, a fertilizer injection control unit, a sensor detection unit, a water and fertilizer mixing unit, and a main water and fertilizer pipeline. The fertilizer injection control unit includes at least one gear pump. By replacing the traditional peristaltic pump with a gear pump, this application achieves continuous linear control, solving the problem of discontinuous fertilizer injection. Furthermore, the gear pump can be controlled by the electrical control unit, enabling high-speed operation and thus achieving dynamic regulation of fertilizer injection.

[0017] The water and fertilizer device provided in this application can also provide a larger working pressure (e.g., 10-20 kg), and the gear pump eliminates the need for a pressure-reducing pipeline structure, making it simple to construct. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a water and fertilizer device according to an embodiment of this application is shown;

[0020] Figure 2 A schematic diagram of a fertilizer injection control unit according to an embodiment of this application is shown;

[0021] Figure 3 Another schematic diagram of the water and fertilizer device according to an embodiment of this application is shown;

[0022] Figure 4 A schematic diagram of an electrical control unit according to an embodiment of this application is shown;

[0023] Figure 5 A schematic diagram of a fixing unit according to an embodiment of this application is shown.

[0024] Explanation of reference numerals in the attached figures:

[0025] Electrical control unit 10, fertilizer injection control unit 20, sensor detection unit 30, water and fertilizer mixing unit 40 and water and fertilizer main pipeline 50; pressure control unit 60; fixing unit 70;

[0026] Air intake module 11, air exhaust module 12, and heat dissipation module 13; heat dissipation duct 14

[0027] Gear pump 21; External fertilizer solution device 22; Fertilizer injection pipeline 211;

[0028] Conductivity detection sensor 31 and pH detection sensor 32;

[0029] Input terminal 51; Output terminal 52;

[0030] First pressure detector 61 and second pressure detector 62; power control module 63.

[0031] First fixing unit 71; second fixing unit 72; handheld bracket 711. Detailed Implementation

[0032] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0033] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of these specific details, or other methods, components, materials, devices, etc. In these cases, well-known structures, methods, devices, implementations, materials, or operations will not be shown or described in detail.

[0034] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0035] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order.

[0036] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] According to one aspect of this application, a water and fertilizer device is provided, which includes an electrical control unit 10, a fertilizer injection control unit 20, a sensor detection unit 30, a water and fertilizer mixing unit 40, and a water and fertilizer main pipeline 50.

[0038] According to the example embodiment, such as Figure 1 As shown, the electrical control unit 10 can be an electrical control box, which is installed on top of the water and fertilizer device.

[0039] According to the example embodiment, the fertilizer injection control unit 20 includes at least one gear pump 21, which is electrically connected to the electrical control unit 10. Under the control of the electrical control unit 10, the gear pump 21 injects fertilizer solution from the external fertilizer solution device 22 into the water and fertilizer main pipeline 50 to obtain a water and fertilizer mixture.

[0040] like Figure 2 As shown, the fertilizer injection control unit 20 includes three gear pumps 21, each gear pump 21 being connected to an external fertilizer solution device 22. Figure 2 As shown, the gear pump 21 also includes a fertilizer injection pipe 211. The gear pump 21 is electrically connected to the electrical control unit 10. Under the control of the electrical control unit 10, the gear pump 21 injects the fertilizer solution in the external fertilizer solution device 22 into the main water and fertilizer pipe 50 through the fertilizer injection pipe 211.

[0041] For example, such as Figure 2 As shown, the input end of the fertilizer injection pipe 211 is connected to the external fertilizer solution device 22 to obtain fertilizer solution from the external fertilizer solution device 22; the output end of the fertilizer injection pipe 211 is connected to the main water and fertilizer pipe 50 to inject the obtained fertilizer solution into the main water and fertilizer pipe 50.

[0042] For example, the external fertilizer solution device 22 can be a fertilizer solution tank for holding a preset fertilizer solution.

[0043] Optionally, the electrical control unit 10 can control the fertilizer injection flow rate of the gear pump 21 by controlling the rotation speed of the gear pump 21, thereby adjusting the fertilizer injection ratio of the water and fertilizer device.

[0044] Optionally, the gear pump 21 can be made of PEEK (polyetheretherketone), which has high strength, high temperature resistance, high rigidity and good chemical resistance (such as acid and alkali resistance, hydrolysis resistance, wear resistance, etc.).

[0045] According to the example embodiment, the sensing unit 30 is installed on the main water-fertilizer pipeline 50 and is electrically connected to the electrical control unit 10. The sensing unit 30 detects the characteristic parameter information of the water-fertilizer mixture and sends the characteristic parameter information to the electrical control unit 10, so that the electrical control unit 10 controls the gear pump 21 according to the characteristic parameter information.

[0046] like Figure 1As shown, the sensing and detection unit 30 collects the characteristic parameter information of the water-fertilizer mixture in the main water-fertilizer pipeline 50 and feeds the characteristic parameter information back to the electrical control unit 10. The electrical control unit 10 compares the received characteristic parameter information with the system preset value to determine whether the current characteristic parameter information can meet the irrigation needs of the plants, and further adjusts and controls accordingly.

[0047] Optionally, the electrical control unit 10 may include a control motherboard and a drive controller. The control motherboard generates control commands based on characteristic parameter information and preset target values. The drive controller is electrically connected to the control motherboard and drives the gear pump 21 according to the control commands.

[0048] For example, when the current characteristic parameter information is lower than the system preset value, the electronic control unit 10 generates an acceleration control command to control the gear pump 21 to increase the speed, thereby increasing the fertilizer-to-water ratio in the water-fertilizer mixture; when the current characteristic parameter information is higher than the system preset value, the electronic control unit 10 generates a deceleration control command to control the gear pump 21 to decrease the speed, thereby reducing the fertilizer-to-water ratio in the water-fertilizer mixture. Thus, the electronic control unit 10 can achieve dynamic regulation of the nutrient components in the fertilizer solution.

[0049] According to the example embodiment, the water-fertilizer mixing unit 40 is installed on the water-fertilizer main pipeline for mixing water-fertilizer mixture, and the output end 52 of the water-fertilizer main pipeline 50 outputs the mixed water-fertilizer mixture.

[0050] For example, such as Figure 1 As shown, the water-fertilizer mixing unit 40 is a T-type filter (with a 120-mesh filter screen). When the fertilizer solution enters the main water-fertilizer pipeline 50 through the gear pump 21, the fertilizer solution is mixed with the water in the main water-fertilizer pipeline 50 for the first time to obtain a water-fertilizer mixture. Subsequently, when the water-fertilizer mixture passes through the water-fertilizer mixing unit 40 in the main water-fertilizer pipeline 50, the water-fertilizer mixing unit 40 can thoroughly mix the water-fertilizer mixture again.

[0051] For example, such as Figure 1 As shown, clean water is input from the input end 51 of the main water and fertilizer pipeline 50, and after being fully mixed twice with the fertilizer solution from the gear pump 21, the target water and fertilizer mixture is obtained. Finally, it is output from the output end 52 of the main water and fertilizer pipeline 50 to the target irrigation point, thereby realizing water and fertilizer mixing and completing the irrigation of the plants.

[0052] Through the above exemplary embodiments, the water and fertilizer device provided in this application includes an electrical control unit, a fertilizer injection control unit, a sensor detection unit, a water and fertilizer mixing unit, and a water and fertilizer main pipeline. The fertilizer injection control unit includes at least one gear pump. By replacing the traditional peristaltic pump with a gear pump, this application can achieve continuous linear control, solving the problem of discontinuous fertilizer injection. Furthermore, the gear pump can be controlled by the electrical control unit, enabling high-speed operation and thus achieving dynamic regulation of fertilizer injection.

[0053] The water and fertilizer device provided in this application can also provide a larger working pressure (e.g., 10-20 kg), and the gear pump eliminates the need for a pressure-reducing pipeline structure, making it simple to construct.

[0054] Optionally, such as Figure 3 As shown, the water and fertilizer device also includes a pressure control unit 60. The pressure control unit 60 includes a first pressure detector 61, a second pressure detector 62, and a power control module 63 (not shown in the figure).

[0055] like Figure 3 As shown, the main water and fertilizer pipeline 50 includes an input end 51 and an output end 52. A first pressure detector 61 is installed at the input end 51 (e.g., ...). Figure 3 Above the input terminal 51 shown, a first liquid pressure value of the input terminal 51 is detected. A second pressure detector 62 is located at the output terminal 52 to detect a second liquid pressure value of the output terminal 52.

[0056] The power control module 63 controls the flow rate of the liquid input to the input terminal 51 based on the first liquid pressure value and / or the second liquid pressure value, so as to control the pressure difference of the water-fertilizer mixture.

[0057] For example, both the first pressure detector 61 and the second pressure detector 62 are pressure gauges, and the power control module 63 is a power pump. When water enters the main water-fertilizer pipeline 50 from the input end 51, the first pressure detector 61 and the second pressure detector 62 detect the liquid pressure in the main water-fertilizer pipeline 50 in real time and send the pressure detection value to the power control module 63. The power control module 63 controls the water flow rate in the main water-fertilizer pipeline 50 according to the pressure detection value, thereby controlling the pressure difference of the water-fertilizer mixture.

[0058] This configuration can stabilize the pressure difference of the water-fertilizer mixture in the main water-fertilizer pipeline 50 on the one hand; and reduce the resistance when the fertilizer injection control unit 20 injects fertilizer into the main water-fertilizer pipeline 50 by setting the power control module 63 on the other hand.

[0059] Optionally, the water and fertilizer device may also include a pressure relief unit, which is installed on the main water and fertilizer pipeline 50 to discharge air from the main water and fertilizer pipeline 50.

[0060] For example, when fertilizer solution enters the main water and fertilizer pipeline 50 through gear pump 21, air is usually mixed into the fertilizer injection pipeline 211, resulting in excess air in the main water and fertilizer pipeline 50.

[0061] By setting up a pressure relief unit, excess air in the main water and fertilizer pipeline 50 can be discharged, thereby improving the utilization rate of the flow.

[0062] For example, the pressure relief unit can be a pressure relief valve.

[0063] Optionally, the sensing unit 30 includes a conductivity sensor 31 and a pH sensor 32.

[0064] A conductivity sensor 31 is installed at the output end of the water-fertilizer mixing unit 40 to detect the conductivity information of the water-fertilizer mixture. A pH sensor 32 is installed at the output end of the water-fertilizer mixing unit 40 to detect the pH information of the water-fertilizer mixture.

[0065] For example, such as Figure 3 As shown, the conductivity sensor 31 (EC sensor) and the pH sensor 32 (pH sensor) collect the EC and pH values ​​of the water-fertilizer mixture and send them to the electrical control unit 10. The electrical control unit 10 dynamically adjusts the ratio of the water-fertilizer mixture according to the received EC and pH values.

[0066] like Figure 3 As shown, the conductivity sensor 31 (EC sensor) and the pH sensor 32 (PH sensor) are both located at the output end of the water-fertilizer mixing unit 40.

[0067] This configuration ensures that the sensor unit 30 collects characteristic parameter information of the fully mixed water-fertilizer mixture, thereby guaranteeing the detection accuracy of the sensor unit 30.

[0068] Optionally, the conductivity sensor 31 is set at a first angle to the main water and fertilizer pipeline 50, and the pH sensor 32 is set at a second angle to the main water and fertilizer pipeline 50.

[0069] The first angle ranges from 30° to 45°, and the second angle ranges from 30° to 45°.

[0070] For example, the conductivity sensor 31 is set at a 45° angle to the main water and fertilizer pipeline 50, and the pH sensor 32 is set at a 45° angle to the main water and fertilizer pipeline 50.

[0071] This configuration allows the conductivity sensor 31 and the pH sensor 32 to have a certain contact angle with the water-fertilizer mixture, avoiding the problem of insufficient contact area between the sensor and the water-fertilizer mixture due to the limitation of vertical setting space, which would affect the measurement accuracy.

[0072] Optionally, such as Figure 4 As shown, the gear pump 21 is integrated into the electrical control unit 10. The electrical control unit 10 also includes an air intake module 11, an exhaust module 12, and a heat dissipation module 13.

[0073] An air intake module 11 is located on one side of the electronic control unit 10, and an exhaust module 12 is located on the same side as the air intake module 11. A heat dissipation module 13 is located on one side of the electronic control unit 10, and a heat dissipation air duct 14 is formed between the air intake module 11 and the exhaust module 12 under the action of the heat dissipation module 13.

[0074] Optionally, such as Figure 4 As shown, the heat dissipation module 13 includes a heat dissipation fan 131 and a heat dissipation baffle 132.

[0075] For example, the air intake module 11 is the air inlet, the air exhaust module 12 is the air outlet, and the air blown out by the cooling fan 131 is blocked by the heat dissipation baffle 132 and the air direction is changed, and then discharged from the air outlet.

[0076] By setting up the heat dissipation module 13, a heat dissipation structure can be formed inside the electronic control unit 10, such as... Figure 5 The heat dissipation duct 14 is shown.

[0077] This configuration allows for timely cooling of the gear pump 21, ensuring its normal operation and thus extending its service life.

[0078] Optionally, such as Figure 1 As shown, the water and fertilizer device also includes a fixed unit 70, an electrical control unit 10, a fertilizer injection control unit 20, a sensor detection unit 30, a water and fertilizer mixing unit 40, and a water and fertilizer main pipeline 50, all integrated within the fixed unit 70.

[0079] For example, the fixed unit 70 is a fixed bracket, and the electrical control unit 10, fertilizer injection control unit 20, sensor detection unit 30, water and fertilizer mixing unit 40 and water and fertilizer main pipeline 50 are all integrated on the fixed bracket.

[0080] This design integrates the water and fertilizer system into a single device, avoiding the cumbersome structure required by traditional methods that necessitate multiple mounting brackets. The water and fertilizer system provided in this application is characterized by its simple structure.

[0081] Optionally, such as Figure 5 As shown, the fixing unit 70 also includes a first fixing unit 71 and a second fixing unit 72. The electrical control unit 10 and the fertilizer injection control unit 20 are mounted on the first fixing unit 71, while the sensing and detection unit 30, the water and fertilizer mixing unit 40, and the water and fertilizer main pipeline 50 are mounted on the second fixing unit 72. The first fixing unit 71 and the second fixing unit 72 are detachably connected.

[0082] For example, by detachably connecting the first fixing unit 71 and the second fixing unit 72, the electrical control unit 10 and the fertilizer injection control unit 20 mounted on the first fixing unit 71 can be detachably connected to other components. This configuration improves the mobility and operability of the electrical control unit 10 and the fertilizer injection control unit 20.

[0083] Optionally, a handheld support 711 is also provided on the first fixing unit 71. For example... Figure 5 As shown, two handheld supports 711 are respectively arranged on both sides of the first fixed unit 71, so that the user can move the first fixed unit 71 by using the handheld supports 711.

[0084] According to another aspect of this application, a water and fertilizer control system is provided, which includes a remote control terminal and the water and fertilizer device described above. According to an example embodiment, the remote control terminal and the water and fertilizer device are communicatively connected, and the remote control terminal can remotely control the water and fertilizer device.

[0085] Finally, it should be noted that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions of the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A water and fertilizer device, characterized in that, The water and fertilizer device includes an electrical control unit, a fertilizer injection control unit, a sensor detection unit, a water and fertilizer mixing unit, and a water and fertilizer main pipeline. The fertilizer injection control unit includes: At least one gear pump is electrically connected to the electrical control unit. Under the control of the electrical control unit, the gear pump injects fertilizer solution from the external fertilizer solution device into the main water-fertilizer pipeline to obtain a water-fertilizer mixture. The sensing and detection unit is installed on the main water and fertilizer pipeline and is electrically connected to the electrical control unit. The sensing and detection unit detects the characteristic parameter information of the water and fertilizer mixture and sends the characteristic parameter information to the electrical control unit so that the electrical control unit controls the gear pump according to the characteristic parameter information. The water-fertilizer mixing unit is installed on the main water-fertilizer pipeline and is used to mix the water-fertilizer mixture. The mixed water-fertilizer mixture is output from the output end of the main water-fertilizer pipeline.

2. The water and fertilizer device according to claim 1, characterized in that, The main water and fertilizer pipeline includes an input end and an output end. The water and fertilizer device also includes a pressure control unit, which includes: A first pressure detector is installed at the input end to detect the first liquid pressure value at the input end. A second pressure detector is installed at the output end to detect the second liquid pressure value at the output end; The power control module controls the flow rate of the liquid input to the input terminal based on the first liquid pressure value and / or the second liquid pressure value, so as to control the pressure difference of the water-fertilizer mixture.

3. The water and fertilizer device according to claim 1, characterized in that, The water and fertilizer device also includes: A pressure relief unit is installed on the main water and fertilizer pipeline to discharge air from the main water and fertilizer pipeline.

4. The water and fertilizer device according to claim 1, characterized in that, The electrical control unit includes: The control motherboard generates control commands based on the aforementioned feature parameter information and preset target values. The drive controller is electrically connected to the control motherboard and drives the gear pump according to the control commands.

5. The water and fertilizer device according to claim 1, characterized in that, The sensing and detection unit includes: A conductivity sensor is installed at the output end of the water-fertilizer mixing unit to detect the conductivity information of the water-fertilizer mixture. A pH sensor is installed at the output end of the water-fertilizer mixing unit to detect the pH information of the water-fertilizer mixture.

6. The water and fertilizer device according to claim 5, characterized in that, The conductivity sensor is set at a first angle to the main water and fertilizer pipeline, and the pH sensor is set at a second angle to the main water and fertilizer pipeline. The first angle ranges from 30° to 45°, and the second angle ranges from 30° to 45°.

7. The water and fertilizer device according to claim 1, characterized in that, The electronic control unit also includes: An air intake module is located on one side of the electrical control unit; The exhaust module is located on one side of the electrical control unit and is located on the same side as the air intake module; A heat dissipation module is disposed on one side of the electrical control unit. Under the action of the heat dissipation module, a heat dissipation air duct is formed between the air intake module and the air exhaust module.

8. The water and fertilizer device according to claim 1, characterized in that, The water and fertilizer device also includes: The fixed unit integrates the electrical control unit, the fertilizer injection control unit, the sensor detection unit, the water-fertilizer mixing unit, and the water-fertilizer main pipeline.

9. The water and fertilizer device according to claim 8, characterized in that, The fixing unit includes a first fixing unit and a second fixing unit; The electrical control unit and the fertilizer injection control unit are mounted on the first fixed unit; The sensing and detection unit, the water and fertilizer mixing unit, and the water and fertilizer main pipeline are mounted on the second fixed unit; The first fixing unit and the second fixing unit are detachably connected.

10. A water and fertilizer control system, characterized in that, It includes a remote control terminal and a water and fertilizer device as described in any one of claims 1-9, wherein the remote control terminal and the water and fertilizer device are communicatively connected to remotely control the water and fertilizer device.

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