Low-temperature smoke generating system for agricultural plant protection

Abstract

The application discloses a low-temperature smoke generating system for agricultural plant protection, which comprises a master controller, a regulating device, a smoke generating pipe, a spray head, a mobile phone terminal program, a spray gun, a back-carrying container, and can realize one-key power switch and mode switching operation, and can also set a starting default mode and detailed working parameters on the mobile phone terminal program, and the mobile phone terminal program can display and count various historical operation data. The smoke generating system can realize the adjustment of the smoke output temperature, the adjustment of the pesticide particle size after mixing, and various operation scenes such as tree operation, vegetable operation, biological pesticide operation or self-defined operation. The fuel can be propane, butane, petroleum liquefied gas and the like. The system has the advantages of wide application range of pesticides, reduced pesticide waste, significantly improved operation efficiency and operation effect of agricultural plant protection and the like.

Description

Technical Field

[0001] This invention relates to the field of program-controlled agricultural machinery devices, and more particularly to a low-temperature smoke generation system for agricultural plant protection. Background Technology

[0002] Using smoke-assisted pesticide spraying has unparalleled advantages over traditional water mist spraying in agriculture or forestry. This is because the smoke impacts and mixes with the pesticide, resulting in thorough atomization of the pesticide solution, small pesticide particles, and the ability of the pesticide mist to diffuse over the work area for a long time. It has good operational effects in the field of plant protection for tall fruit trees and can also be used for the control of sanitary pests and disinfection, with advantages such as improved efficiency and reduced pesticide usage and residues.

[0003] Currently available smoke-type plant protection machines, taking the patents "An Electric Smoke Machine (CN201721245093.X)" and "A New Type of Agricultural Mist Sprayer (CN202022708057.0)" as examples, generally suffer from problems such as excessively high smoke generation temperature leading to significant damage to pesticides, limited functionality, and incompatibility with tall fruit trees, low-growing crops, and the application of biological pesticides. Summary of the Invention

[0004] The purpose of this invention is to provide a low-temperature smoke generation system for agricultural plant protection, so as to solve the problems mentioned in the above-mentioned technical background.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A low-temperature smoke generation system for agricultural plant protection includes: a main controller, a control device, a smoke generating pipe, a nozzle, a mobile terminal program, a flame gun, and a backpack container;

[0007] The one-click power switch and mode switching operation allows users to select from tree operation, vegetable operation, biological pesticide operation, or a custom operation in the current task. Users can also enter the mobile app settings mode and set the default operation mode order via Bluetooth communication, as well as the specific parameters of each operation mode in the mobile app settings. The set data is valid after power off and power failure. The mobile app can read historical operation data stored in the main controller, including operation time, operation trajectory, working duration, smoke agent consumption, pesticide consumption, temperature data, battery level, etc. After uploading, the mobile app can view the relevant operation trajectory map and work data statistics for each historical operation.

[0008] The main controller collects the smoke temperature via a temperature sensor on the nozzle and the smoke pressure via a smoke pressure sensor. The temperature sensor is installed on the side wall of the nozzle before the smoke and pesticide are mixed, and the smoke pressure sensor is installed in the pipeline between the smoke inlet and the smoke agent check valve. The main controller adjusts the smoke agent flow rate based on real-time smoke temperature feedback to control the smoke temperature emitted from the smoke agent pipe between 115 and 180°C. The main controller also controls the gas pressure P of the flame gun according to different operating modes. 燃气 At 50kPa≤P 燃气 Adjustable within ≤400kPa to meet the effective pressure P at the smoke inlet. 烟 Working at 30kPa≤P 烟 Within the range of ≤150kPa, the main controller collects data from the smoke pressure sensor and adjusts the pesticide flow rate in real time. The real-time pesticide flow rate G 药 Pressure P of the smoke-generating pipe 烟 Proportional to: G 药 =kP 烟 Depending on the different operating modes and pesticide spraying requirements, the value of k ranges from 2.5 to 16. The larger the value of K, the larger the particle size of the pesticide atomization. The unit is ml / kPa·min. 烟 The unit is kPa.

[0009] The main controller collects the real-time flow rate of the smoke agent through a smoke agent flow meter and adjusts the flow rate by controlling the smoke agent pump through pulse width modulation. The smoke agent flow meter is installed in the pipeline before the smoke agent check valve and is electrically connected to the main controller to detect the real-time flow rate of the smoke agent. The main controller dynamically adjusts the input smoke agent flow rate in real time based on the difference between the real-time temperature collected by the temperature sensor and the target control temperature. 实时 With target control temperature T 目标 Real-time flow rate of smoke agent Q 实时 Calculate the regulating flow rate Q 调节 Satisfying: Q 调节 =Q 实时 ×(T 实时 / T 目标 ) m The values ​​of m are as follows: In T 实时 / T 目标 ≤0.7 or T 实时 / T 目标 When ≥1.3, m=3, and when 0.7≤T 实时 / T 目标 ≤0.9 or 1.1≤T 实时 / T 目标 Within the range ≤1.3, m=(T 实时 -T 目标 ) / T 目标×10, otherwise m=1, and simultaneously adjust the flow rate Q. 调节 It also needs to meet the following requirement: 100ml≤Q 调节 ≤500ml / min.

[0010] Preferably, the smoke-generating tube is a metal tube with an inner diameter of 4-9 mm, spirally wound into a cylindrical coil. The coil diameter is 5-8 times the inner diameter of the metal tube, and the total length of the metal tube is 15-30 times the inner diameter. A circular baffle is fixed at the rear end of the cylindrical coil to guide the flame from inside the cylinder through the gaps between the metal tubes to the outside of the cylinder. The pitch P of the coil is... 螺距 Compared to the diameter D of the smoke-generating pipe 发烟管 Large, satisfying the following relationship: 1.1D 发烟管 ≤P 螺距 ≤1.5D 发烟管 .

[0011] Preferably, a flame gun is fixed at the front end of the cylindrical coil. The nozzle diameter of the flame gun is smaller than the inner diameter of the cylinder, which is 0.5 to 0.85 times the inner diameter of the cylinder. The flame gun is spaced 2 to 5 centimeters away from the cylinder. The igniter is electrically connected to the main controller to achieve automatic ignition.

[0012] Preferably, the smoke-generating pipe outlet is connected to the nozzle, and the nozzle is provided with a pesticide inlet. The input pesticide is atomized by the high-speed smoke flowing through the nozzle, forming a smoke-pesticide mixture that is sprayed out.

[0013] Preferably, the control device is used to regulate the pipelines containing the smoke agent, pesticide, and fuel. The control device includes a smoke agent pump, a smoke agent solenoid valve, a pesticide pump, a pesticide solenoid valve, a fuel solenoid valve, a fuel pressure regulating valve, and an igniter, all of which are electrically connected to the main controller. The control device also includes a smoke agent check valve and a pesticide check valve. The smoke agent check valve is installed near the smoke generation pipe inlet to prevent the smoke agent from flowing back due to high pressure in the smoke generation pipe. The pesticide check valve is installed at the pesticide inlet of the nozzle to prevent the pesticide from flowing back.

[0014] Preferably, the smoke agent, pesticide, and fuel can be stored in a backpack container and fed into the smoke generation system through a pipeline. The backpack container also includes a battery, which is connected to the main control module through a wire to power the system.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In this invention, the temperature and pressure of the smoke output from the smoke-generating pipe are adjusted by multiple sensors under the control of the main controller algorithm, adapting to various types of pesticides and operating scenarios. The particle size of the pesticide after the smoke and pesticide mixture is adjustable, enabling tree operations, vegetable operations, and biological pesticide operations.

[0017] In this invention, multiple sensors are used to collect and detect signals to achieve working status and fault detection, thereby improving equipment safety and reducing maintenance costs. The smoke output and fuel consumption are precisely controlled by the smoke pump and fuel pressure regulating valve. At the same time, the smoke pressure sensor and pesticide pump work together to produce less fuel and achieve a more ideal pesticide atomization effect with the same smoke output performance. The cooperation between the components makes the system's performance more outstanding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a structural schematic diagram from one perspective of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of some internal components of the present invention;

[0021] Figure 4 This is a schematic diagram of the main controller of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the backpack container of the present invention;

[0023] Figure 6 A flowchart illustrating the relationship between the pesticide pipeline, fuel pipeline, and fumigant pipeline of this invention;

[0024] Figure 7 This is a diagram showing the pesticide pipeline connection of the present invention;

[0025] Figure 8 This is a diagram showing the connection of the smoke agent pipeline in this invention;

[0026] Figure 9 This is a diagram showing the fuel pipeline connection of the present invention.

[0027] In the picture:

[0028] 1. Nozzle; 4. Backpack container assembly; 5. Mobile app; 101. Pesticide inlet; 102. Temperature sensor; 103. Pesticide check valve; 202. Smoke generator; 203. Flame gun; 204. Ignition needle; 205. Smoke generator round baffle; 206. Smoke generator inlet; 207. Smoke generator outlet; 208. Anti-scalding mesh cover; 301. Smoke flow meter; 302. Pesticide flow meter; 303. Smoke solenoid valve; 304. Pesticide solenoid valve; 305. Smoke inlet pipe; 306. Pesticide inlet pipe; 307. Power supply Plug; 308, Fuel inlet pipe; 309, Igniter; 310, Smoke pump; 311, Pesticide pump; 312, Fuel solenoid valve; 313, Handle; 314, Smoke pressure sensor; 315, Smoke check valve; 316, Buzzer; 317, Carrier box; 318, Main controller; 319, Power button; 320, Fuel pressure sensor; 321, Fuel pressure regulating valve; 401, Smoke container; 402, Fuel pressure reducing valve; 403, Pesticide container; 404, Fuel container; 405, Battery; 406, Main fuel valve. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, those skilled in the art who have not made any innovative embodiments are all within the scope of protection of the present invention.

[0030] The accompanying drawings of the embodiment conceal some of the connecting wires, and it can be understood that structures within the scope of common general knowledge do not need to be described in this embodiment.

[0031] Please see Figures 1-9 The present invention provides a technical solution:

[0032] A low-temperature smoke generation system for agricultural plant protection includes: a main controller 318, a control device, a smoke generating pipe 202, a nozzle 1, and a mobile terminal program 5.

[0033] like Figure 1 , Figure 2 As shown, the carrier box 317 is a square box made of multiple connected panels, used to centrally fix the control device, main controller 318, flame gun 203, igniter 309, etc. The handle 313 is fixed to the carrier box 317, and the anti-scalding mesh cover 208 is connected to the carrier box 317. Figure 2This is a schematic diagram of the internal components behind the carrier box 317, the anti-scalding mesh cover 208, the main controller 318, and the power plug 307. The control device is used to regulate the pipelines containing the fume extractor, pesticide, and fuel. The control device includes a fume pump 310, a fume solenoid valve 303, a pesticide pump 311, a pesticide solenoid valve 304, a fuel solenoid valve 312, a fuel pressure regulating valve 321, and an igniter 309, all of which are electrically connected to the main controller 318. Figure 3 As shown, the control device also includes a smoke agent backflow preventer 315, a pesticide backflow preventer 103, and a spray gun; wherein, the smoke agent backflow preventer 315 is installed near the smoke-generating pipe inlet to prevent the smoke agent from flowing back due to the high pressure of the smoke-generating pipe 202; the pesticide backflow preventer 103 is installed at the pesticide inlet 101 of the nozzle to prevent the pesticide from flowing back.

[0034] like Figures 7-9 As shown, the main controller 318 is electrically connected to multiple sensors, including a temperature sensor 102, a smoke pressure sensor 314, a smoke flow meter 301, a pesticide flow meter 302, a fuel solenoid valve 312, a fuel pressure regulating valve 321, and a fuel pressure sensor 320; among which, as shown... Figure 3 As shown, temperature sensor 102 is installed on the side wall of nozzle 1 before the smoke and pesticide are mixed, and is used to detect the temperature before the smoke is mixed; as Figure 3 As shown, the smoke pressure sensor 314 is installed in the pipeline between the smoke inlet of the smoke-generating pipe and the smoke agent check valve 315 to collect the pressure inside the smoke-generating pipe 202; as Figure 8 As shown, the smoke flow meter 301 is installed in the pipeline before the smoke check valve 315 and is electrically connected to the main controller 318 to detect the real-time flow rate of the smoke; as Figure 7 As shown, the pesticide flow meter 302 is installed in the pipeline where the pesticide is located, in the pipeline before the pesticide check valve 103, and is used to detect the pesticide flow rate; Figure 9 As shown, the fuel pressure sensor 320 is installed in the pipeline after the fuel pressure regulating valve 321 and controls the fuel pressure regulating valve 321 to ensure that the working pressure is at the preset value.

[0035] like Figure 3 As shown, the smoke-generating tube 202 is a cylindrical coil formed by spirally winding a metal tube through several turns. A circular baffle is fixed at the rear end of the cylindrical coil to guide the flame from inside the cylinder through the gaps between the smoke-generating tubes 202 to the outside of the cylinder. The pitch P of the coil is... 螺距 Compared to the diameter D of the 202 smoke-generating pipe 发烟管 Large, satisfying the following relationship: 1.1D 发烟管 ≤P 螺距 ≤1.5D 发烟管 The smoke-generating pipe 202 is equipped with a heat-proof mesh cover 208 to prevent flames from escaping.

[0036] like Figure 3As shown, a flame gun 203 is fixed at the front end of the cylindrical coil. The diameter of the flame gun 203 is smaller than the inner diameter of the cylinder, which is 0.5 to 0.85 times the inner diameter of the cylinder. The flame gun 203 is 2 to 5 cm away from the cylinder. The igniter 309 is electrically connected to the main controller 318. The ignition needle 204 is installed on the outside of the flame gun 203 to achieve automatic ignition.

[0037] like Figure 3 As shown, the smoke outlet 207 of the smoke generator pipe is connected to the nozzle 1. The nozzle 1 is equipped with a pesticide inlet 101 for inputting pesticides. The input pesticides are atomized by the high-speed smoke flowing through the nozzle 1, forming a smoke-pesticide mixture that is sprayed out. Figure 4 As shown, a temperature sensor 102 is installed on the nozzle 1 to detect the temperature of the smoke.

[0038] like Figure 5 The backpack container assembly 4 includes a smoke agent container 401, a pesticide container 403, and a fuel container 404, which are used to store smoke agents, pesticides, and fuel, respectively, and are supplied to the smoke generation system through smoke agent inlet pipe 305, pesticide inlet pipe 306, and fuel inlet pipe 308, respectively. The backpack container also includes a battery 405, which is electrically connected to the main controller 318 through a power plug 307 to supply power to the system. The fuel container 404 is equipped with a fuel master valve 406 and a fuel pressure reducing valve 402.

[0039] like Figure 7 As shown, the pipelines through which the pesticide passes in sequence are: pesticide container 403, pesticide inlet pipe 306, pesticide solenoid valve 304, pesticide pump 311, pesticide flow meter 302, pesticide check valve 103, pesticide inlet 101, and nozzle 1.

[0040] like Figure 8 As shown, the pipeline structure through which the smoke agent passes in sequence is as follows: smoke agent container 401, smoke agent inlet pipe 305, smoke agent solenoid valve 303, smoke agent pump 310, smoke agent flow meter 301, smoke agent check valve 315, smoke generation pressure sensor 314, smoke generation pipe 202, and nozzle 1.

[0041] like Figure 9 As shown, the pipeline structure through which the fuel passes in sequence is as follows: fuel container 404, fuel main valve 406, fuel inlet pipe 308, fuel solenoid valve 312, fuel pressure regulating valve 321, fuel pressure sensor 320, and flame gun 203.

[0042] The main controller 318 collects the real-time temperature T from the temperature sensor 102. 实时 With target control temperature T 目标 Real-time flow rate of smoke agent Q 实时 Calculate the regulating flow rate Q 调节 Satisfying: Q 调节 =Q 实时×T 实时 / T 目标 m The value of m is between 1 and 3, and the flow rate Q is adjusted. 调节 It also needs to meet the following requirement: 100ml≤Q 调节 ≤500ml / min.

[0043] like Figures 7-8 As shown, after adjusting the flow rate of the smoke agent based on real-time smoke temperature feedback, the main controller 318 collects data from the smoke pressure sensor 314 and adjusts the pesticide flow rate in real time. The real-time pesticide flow rate G 药 The pressure Psmoke in the smoke-generating tube 202 is directly proportional to the pressure Psmoke: Gpowder = kPp 烟 Depending on the different operating modes and the required amount of pesticide spraying, the value of k ranges from 2.5 to 16. The larger the value of K, the larger the particle size of the pesticide atomization. The unit of k is ml / kPa·min, and the unit of P_fum is kPa.

[0044] In this embodiment, the main controller 318 communicates with the mobile application 5 via Bluetooth. The mobile application 5 can set the order of the default operating modes upon startup, and set specific parameters for each operating mode. The set data is valid after power off and after shutdown. The mobile application 5 can read historical operating data stored in the main controller 318, including operating time, operating trajectory, working duration, smoke agent consumption, pesticide consumption, temperature data, battery level, etc., and provides relevant map coordinate data and work statistics. After uploading, the mobile application 5 can view the relevant operating trajectory map and work data statistics for each historical operation.

[0045] In this embodiment, the startup process of the low-temperature smoke generation system is as follows:

[0046] Step 1: Setting up working status and parameters. One-button operation enables power on / off and mode switching. With battery 405 powered on or off, press and hold the power button for 3 seconds. The machine will start and emit a beep. Within 3 seconds of hearing the beep, if the power button 319 is not pressed, it will operate in default mode one. A single short press switches to default mode two, two short presses switch to default mode three, and three short presses enter Bluetooth communication mode with the mobile phone. The mobile app 5 allows configuration of default mode one, default mode two, and default mode three for tree planting, vegetable planting, or biological pesticide application, and also allows for custom configuration of new modes to meet individual needs. For each operating mode, parameters such as smoke temperature, m value, K value, gas working pressure, and pesticide atomization particle size range can be set. These settings are effective after the machine is turned off or power is disconnected.

[0047] Step Two: Operating Condition Check. After power-on, the main controller 318 checks the battery 405 charge, pesticide, fumigant, and fuel gas levels. For battery 405 testing, normal operation requires a charge level above 20%. For pesticide and fumigant testing, the pesticide pump 311, pesticide solenoid valve 304, fumigant pump 310, and fumigant solenoid valve 303 are activated. The pesticide flow meter 302 and fumigant flow meter 301 detect the presence of pesticides and fumigants. For fuel gas testing, after manually opening the main fuel valve 406 and outputting 0.4MPa fuel gas through the fuel pressure reducing valve 402, the main controller 318 opens the fuel solenoid valve 312 and controls the fuel pressure regulating valve 321 to check if the preset pressure has been reached. If the main controller 318 fails any of the tests for battery 405, pesticide, fumigant, or fuel gas, it will sound an audible warning via buzzer 316 and stop executing subsequent steps.

[0048] Step 3: Ignition detection. The main controller 318 opens the fuel solenoid valve 312, controls the fuel pressure regulating valve 321 to output 0.2MPa gas, starts the igniter 309 for ignition, and opens the smoke pump 310 and smoke solenoid valve 303 after 5 seconds. The main controller 318 adjusts the smoke flow rate to 0.5Q. 满 The system detects whether the smoke pressure sensor increases by 30 kPa within 5 seconds after starting the smoke pump 310. If it does, the ignition is successful; otherwise, the main controller 318 shuts down the system and issues a fault warning.

[0049] Step 4: In this embodiment, the process by which the low-temperature smoke generation system achieves stable operation is as follows:

[0050] For the three listed operation modes—tree operation, vegetable operation, and biopesticide operation—the temperature control algorithm before the smoke impacts the pesticide is as follows: The real-time temperature T collected by temperature sensor 102... 实时 With target control temperature T 目标 Real-time flow rate of smoke agent Q 实时 Calculate the regulating flow rate Q 调节 Satisfying: Q 调节 =Q 实时 ×T 实时 / T 目标 m The values ​​of m are as follows: In T 实时 / T 目标 ≤0.7 or T 实时 / T 目标 When ≥1.3, m=3, and when 0.7≤T 实时 / T 目标 ≤0.9 or 1.1≤T 实时 / T 目标 Within the range ≤1.3, m=(T 实时 -T 目标 ) / T 目标×10, otherwise m=1. Simultaneously, adjust the flow rate Q. 调节 It also needs to meet the following requirement: 100ml≤Q 调节 ≤500ml / min.

[0051] For tree operations, including fruit trees, forest trees, and some trellis-grown vegetables such as winter melon and green beans, the characteristics of these plants are their height, generally over 1 meter or even more than 10 meters. The goal is to achieve a pesticide atomization effect where the pesticide particles are smaller than 100 μm when impacted by the smoke, mixing with the smoke to form a white pesticide mist that remains suspended in the air for a certain distance. This ensures that tall fruit trees are thoroughly soaked with the suspended pesticide. Achieving these requirements requires considering that high-temperature, high-pressure smoke impact easily atomizes the pesticide into small particles, while also ensuring that the impact temperature is below the Leidenfrost phenomenon. Furthermore, when using ordinary pesticides, the extremely short impact time must ensure that the pesticide does not decompose at high temperatures. In fruit tree operation mode, the main controller 318 can change the temperature and operating pressure of the smoke generator outlet 207 by adjusting the fuel pressure regulating valve 321 and the flow rate of the smoke pump 310. The flow rate of the smoke pump 310 is inversely proportional to the temperature at the smoke outlet 207, while the fuel pressure is directly proportional to the smoke pressure. Furthermore, the magnitude of the fuel pressure is related to both the output temperature and pressure of the smoke outlet. By controlling the flow rate of the smoke pump 310 and the fuel pressure, with m set to 2, the temperature measured by the temperature sensor 102 is kept within the range of 170–180℃, and the effective pressure P of the smoke outlet 202 is maintained. 烟 At 50kPa≤P 烟 Within the range of ≤100kPa. The smoke agent is composed of a mixture of smoke-generating agent concentrate and water, with the volume of water being 1 to 2 times that of the smoke-generating agent concentrate.

[0052] For low-growing vegetable operations, characterized by short plant height, pesticide particles with a diameter of 150–220 μm are required to impact the pesticide with smoke. The pesticide mist primarily settles downwards but also possesses a certain degree of penetrability. In vegetable operation mode, the main controller 318 adjusts the fuel pressure regulating valve 321 and the smoke pump 310, with m set to 2, to achieve a temperature between 150–160°C as measured by the temperature sensor 102, and an effective pressure P at the smoke generator 202. 烟 At 30kPa≤P 烟 Within the range of ≤80kPa. The ratio of the smoke-generating agent concentrate to water is 4 to 7 times the volume of the smoke-generating agent concentrate.

[0053] For biological pesticide operations, the pesticides have poor high-temperature tolerance. Therefore, high-pressure, low-temperature smoke should be used to briefly impact the pesticides. In biological pesticide operation mode, the main controller 318 adjusts the fuel pressure regulating valve 321 and the smoke pump 310, with m set to 3, to achieve a temperature between 115 and 125°C as measured by the temperature sensor 102, and an effective pressure of 80 kPa ≤ P in the smoke generating pipe 202.烟 Within the range of ≤150kPa, the higher the effective pressure, the smaller the particle size of the pesticide atomization, and the farther the smoke-pesticide mixture disperses in the air. Conversely, it is suitable for low-growing crops such as vegetables. The ratio of smoke-generating agent concentrate to water should be referenced for tree and vegetable operations.

[0054] The above detailed parameters can be adjusted through the mobile app 5. Once the settings in the mobile app 5 are applied, they will be effective for every subsequent task.

[0055] Step 5: In this embodiment, the process by which the low-temperature smoke generation system achieves pesticide output is as follows:

[0056] Pesticide real-time flow rate (G) 药 Pressure P of the smoke-generating pipe 202 烟 Proportional to: G 药 =kP 烟 The unit of k is ml / kPa·min, and P 烟 The unit is kPa. The larger the value of K, the larger the particle size of the pesticide atomization. For tree operations, the value of k ranges from 2.5 to 8; for vegetable operations, the value of k ranges from 7 to 16; and for biological pesticide operations, the value of k ranges from 2.5 to 16 depending on the height of the plant being treated. Specific parameters can be set through the mobile app 5.

[0057] Step Six: In this embodiment, the basis for the automatic shutdown of the low-temperature smoke generation system is as follows:

[0058] When the pesticide runs out: the main controller 318 cannot collect flow data through the pesticide flow meter 302, and at the same time the operating current of the pesticide pump 311 drops to the no-load range.

[0059] When the smoke agent is used up: the main controller 318 cannot collect flow data through the smoke agent flow meter 301, and at the same time the operating current of the smoke agent pump 310 drops to the no-load range.

[0060] Fuel depleted: During operation, the main controller 318 controls the fuel pressure regulating valve 321, but still cannot reach the preset fuel pressure;

[0061] Battery level alarm: The system alerts the user when the remaining battery capacity of the 405 battery is 20% as detected by the main controller 318, and shuts down the system when the remaining capacity is below 10%.

[0062] When any of the above problems occur, the buzzer 316 will provide different reminders and automatically shut down the device;

[0063] Step 7: In this embodiment, the fault alarm of the low-temperature smoke generation system includes:

[0064] For detecting circuit faults in pesticide pump 311, fumigation pump 310, and fuel pressure regulating valve 321, the main controller 318 monitors the operating current of each device during operation. Zero current indicates an open circuit fault, and current exceeding the rated value indicates a short circuit fault and triggers automatic protection.

[0065] When detecting blockages in the smoke generation path and pesticide branch path, if the operating current of the corresponding pump exceeds the normal value, but the corresponding flow meter cannot collect flow data, it is judged that the corresponding branch path is blocked.

[0066] If the fuel pressure regulating valve's operating current is normal but the output pressure cannot be reduced during fuel passage testing, then the fuel pressure regulating valve is faulty.

[0067] When the above problems occur, different reminders are given through the buzzer 316 and the system is automatically shut down.

[0068] All parts not described in this invention are the same as or can be implemented using existing technology. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature smoke generation system for agricultural plant protection, characterized in that: The system includes a main controller, control device, smoke generator, nozzle, mobile app, flamethrower, and backpack container; The main controller communicates with the mobile app via Bluetooth. The main controller has a power button that can turn the power on and off and switch modes with one click. The mobile app is used to set the order of the default operating modes and the specific parameters of each operating mode. It can also display and analyze the historical operating data on the main controller. The main controller collects the temperature of the smoke through the temperature sensor on the nozzle, collects the real-time flow rate of the smoke through the smoke flow meter, and controls the working voltage of the smoke pump through pulse width modulation to regulate the real-time flow rate of the smoke. The main controller collects the pressure inside the smoke-generating pipe through a smoke pressure sensor, collects the pesticide flow rate through a pesticide flow meter, and adjusts the pesticide flow rate through a pesticide pump. The pesticide flow rate is directly proportional to the pressure inside the smoke-generating pipe. The main controller collects the fuel pressure through the fuel pressure sensor and adjusts the fuel pressure input to the flame gun through the fuel pressure regulating valve. If the fuel is exhausted, the main controller will issue a reminder. The smoke-generating tube is a metal tube with an inner diameter of 4-9 mm, spirally wound into a cylindrical coil. The coil diameter is 5-8 times the inner diameter of the metal tube, and the total length of the metal tube is 15-30 times the inner diameter. A circular baffle is fixed at the rear end of the cylindrical coil to guide the flame from inside the coil through the gaps between the metal tubes to the outside of the coil. The pitch P of the coil... 螺距 Compared to the diameter D of the smoke-generating pipe 发烟管 Large, satisfying the following relationship: 1.1D 发烟管 ≤P 螺距 ≤1.5D 发烟管 ; The smoke flow meter is installed in the pipeline before the smoke check valve, the fuel pressure sensor is installed in the pipeline after the fuel pressure regulating valve, the temperature sensor is installed on the side wall of the nozzle before the smoke and pesticide are mixed, and the smoke pressure sensor is installed in the pipeline between the smoke inlet and the smoke check valve; the main controller adjusts the smoke flow rate and inputs the fuel pressure P of the flame gun. 燃气 The smoke temperature at the outlet of the smoke generator should be between 115 and 180°C, while the effective pressure P at the inlet of the smoke generator should also be within acceptable limits. 烟 At 30kPa≤P 烟 Within the range of ≤150 kPa; where the smoke agent flow rate is 100 ml / min to 500 ml / min, and the fuel pressure P 燃气 Satisfying 50kPa≤P 燃气 ≤400kPa; The smoke flow meter is installed in the pipeline before the smoke check valve and is electrically connected to the main controller to detect the real-time smoke flow. The main controller uses the real-time temperature T collected by the temperature sensor to detect the real-time smoke flow. 实时 With target control temperature T 目标 Real-time flow rate of smoke agent Q 实时 Calculate the regulating flow rate Q 调节 Satisfying: Q 调节 =Q 实时 ×(T 实时 / T 目标 ) m The value of m is between 1 and 3, and the flow rate Q is adjusted. 调节 It also needs to meet the following requirement: 100ml / min ≤ Q 调节 ≤500ml / min; Pesticide real-time flow rate (G) 药 Pressure P of the smoke-generating pipe 烟 Proportional to: G 药 =kP 烟 Depending on the different operating modes and pesticide spraying requirements, the value of k ranges from 2.5 to 16, with units of ml / kPa·min. 烟 The unit is kPa.

2. The low-temperature smoke generation system for agricultural plant protection according to claim 1, characterized in that: The control device is used to regulate the pipelines containing smoke agent, pesticide, and fuel. The control device includes a smoke agent pump, a smoke agent solenoid valve, a pesticide pump, a pesticide solenoid valve, a fuel solenoid valve, a fuel pressure regulating valve, and an igniter, all of which are electrically connected to the main controller. The control device also includes a smoke agent check valve and a pesticide check valve; wherein, the smoke agent check valve is installed near the smoke inlet of the smoke generation pipe, and the pesticide check valve is installed at the pesticide inlet of the nozzle.

3. The low-temperature smoke generation system for agricultural plant protection according to claim 1, characterized in that: A flame gun is fixed to the front end of the cylindrical coil. The nozzle diameter of the flame gun is smaller than the inner diameter of the cylindrical coil, which is 0.5 to 0.85 times the inner diameter of the cylindrical coil. The distance between the flame gun and the cylindrical coil is 2 to 5 centimeters. The igniter is electrically connected to the main controller to achieve automatic ignition.

4. A low-temperature smoke generation system for agricultural plant protection according to claim 1, characterized in that: The power button is used to switch the power on and off and switch modes, including tree operation, vegetable operation, biological pesticide operation, or custom operation. At the same time, the mobile app communicates with the main controller via Bluetooth to set the order of the default operation modes and the specific parameters of each operation mode. The set data is valid after power off and power failure. The mobile app can read historical operation data stored in the main controller, including operation time, operation trajectory, working duration, smoke agent consumption, pesticide consumption, temperature data, and battery level. The mobile app provides relevant map coordinate data and work statistics data, and generates relevant operation trajectory maps and work data statistics tables for each historical operation.

5. A low-temperature smoke generation system for agricultural plant protection according to claim 1, characterized in that: By detecting pesticide flow meters and monitoring changes in the operating current of pesticide pumps, it can be determined whether pesticides have been used up and whether the pesticide pump is open or the pipeline is blocked. By detecting smoke flow meters and monitoring changes in the operating current of smoke pumps, it can be determined whether smoke agents have been used up and whether the smoke pump is open or the pipeline is blocked. By detecting the operating current and output pressure of fuel pressure regulating valves, it can be determined whether the working status of fuel pressure regulating valves is normal.

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