Backpack type powder spraying machine and powder spraying method

Abstract

The invention relates to the technical field of deinsectization devices, and provides a backpack type powder spraying machine and a powder spraying method.The backpack type powder spraying machine comprises a machine body, a powder bin, a powder discharging component, a powder spraying pipe, a draught fan assembly and a controller, the powder bin is arranged at the top of the machine body and communicates with the powder discharging component so that powder can enter the powder discharging component, and the powder spraying pipe communicates with the powder discharging component; the powder spraying pipe can rotate relative to the powder discharging component, the fan assembly communicates with the powder discharging component, and airflow generated by the fan assembly can spray powder in the powder discharging component out of the powder spraying pipe. According to the backpack type powder spraying machine, the situation of non-uniform pesticide distribution can be effectively avoided, the overall effect of pest control is enhanced, the risk that crops are damaged is reduced, pesticide use is optimized, unnecessary waste is reduced, and the overall pesticide application efficiency and economic benefits are improved; the backpack type powder sprayer has the advantages of being good in pesticide application consistency, high in pesticide application efficiency, small in pesticide application waste and the like.

Description

Technical Field

[0001] The invention relates to the technical field of insecticide devices, and in particular to a backpack powder sprayer and a powder spraying method. Background Art

[0002] A backpack duster has the advantages of long spraying distance and high operating efficiency. In related technologies, when applying pesticides to taller plants, a backpack duster can only apply pesticides above the canopy, resulting in insufficient pesticide deposition in the middle and lower parts of the canopy, seriously affecting the effect of pest control. Even if attempts are made to apply pesticides to the middle and lower parts of the canopy, it is difficult to ensure the consistency of the application due to the lack of a precise control mechanism, which not only causes uneven distribution of the pesticide, but also further weakens the control effect, making it impossible to effectively control pests and diseases in some areas, increasing the risk of crop damage, and also causing waste due to improper use of pesticides, reducing the overall efficiency of pesticide application and economic benefits. Summary of the invention

[0003] The invention provides a backpack powder sprayer, which is used to solve the defects of the powder sprayer in the prior art that it is difficult to ensure the consistency of pesticide application and the pesticide is easily wasted, thereby improving the consistency of pesticide application and reducing the waste of pesticide application.

[0004] The embodiment of the present invention discloses a backpack powder spraying machine, comprising: Body; A powder bin, the powder bin being arranged on the top of the machine body; A powder lowering component, the powder bin is in communication with the powder lowering component so that powder can enter the powder lowering component; A powder spraying pipe, the powder spraying pipe is connected to the lower powder component, and the powder spraying pipe can rotate relative to the lower powder component; A fan assembly, the fan assembly is connected to the powder lowering component, and the airflow generated by the fan assembly can spray the powder in the powder lowering component out of the powder spraying pipe; A controller is provided, wherein the controller can adjust the powder discharging amount of the powder discharging component according to the moving speed of the backpack powder spraying machine and the posture of the powder spraying tube.

[0005] In some embodiments, the powder spraying tube includes a powder outlet and a handle, wherein the handle is arranged on the outer peripheral side of the powder spraying tube, and a posture sensor is arranged on the handle, and the posture sensor is used to detect the position of the powder outlet.

[0006] In some embodiments, the backpack duster further includes a speed sensor, which is disposed on the machine body to detect the moving speed of the backpack duster.

[0007] In some embodiments, the lower powder component includes a lower powder bin, a motor and a lower powder wheel. The top of the lower powder bin is connected to the bottom of the powder bin. The lower powder wheel is rotatably disposed in the lower powder bin. The motor can drive the lower powder wheel to rotate. A plurality of grooves are provided on the outer peripheral surface of the lower powder wheel.

[0008] In some embodiments, the powder discharge amount Q of the powder discharge component is: Q = Nms; Q is the powder feeding amount, unit is g / s; N is the number of the grooves; m is the powder capacity of each groove, in g; s is the rotation speed of the lower powder wheel, in revolutions / s.

[0009] In some embodiments, the speed r of the motor is:

[0010] Wherein, r is the rotation speed of the motor, in revolutions per second; v is the moving speed of the backpack powder sprayer, in m / s; W is the powder spraying distance, in m, A is the amount of powder applied per unit area, in g / m 2 ; N is the number of the grooves; m is the powder capacity of each groove, in g; k is a variable coefficient. When the posture sensor detects that the powder outlet is at the top of the canopy, k=k1; when the posture sensor detects that the powder outlet is at both sides of the canopy, k=k2, wherein k2>k1.

[0011] In some embodiments, the lower powder component includes a magnetic coupler, and the motor drives the lower powder wheel to rotate through the magnetic coupler.

[0012] In some embodiments, the blower assembly includes an oil tank, an engine, and a blower, wherein the oil tank supplies oil to the engine to drive the blower to operate.

[0013] In some embodiments, the backpack powder sprayer further includes a distance sensor, the distance sensor is arranged at the powder outlet, and the distance sensor and the fan assembly are electrically connected to the controller; If the distance measuring sensor detects that there are plants within a preset range from the powder outlet, the controller controls the fan assembly to reduce the wind speed.

[0014] An embodiment of the present invention discloses a powder spraying method, comprising: Obtaining the moving speed of the backpack dust sprayer; Obtaining the position of the powder outlet of the powder spraying pipe of the backpack powder spraying machine; The powder discharging amount of the powder discharging component is controlled according to the moving speed and the position of the powder outlet.

[0015] In the backpack powder sprayer of the embodiment of the present invention, the powder spraying tube can rotate relative to the powder lowering component, and the operator can move the position of the powder spraying tube to apply the pesticide above the canopy or inside the canopy.

[0016] The backpack duster of the embodiment of the present invention dynamically adjusts the powder discharge amount of the powder discharge component by the moving speed of the backpack duster. This design ensures that the amount of pesticide applied per unit area remains consistent regardless of the walking speed, and there is no need to manually adjust the amount of pesticide applied, thereby achieving consistency and uniformity in pesticide application. Moreover, by adjusting the amount of powder discharged by obtaining the position of the powder spraying tube, an ideal coverage effect can be achieved when applying pesticides at different positions (such as above or inside the canopy). In addition, the backpack duster of the embodiment of the present invention adjusts the amount of pesticide applied by a controller, thereby improving the efficiency of pesticide application.

[0017] The backpack powder sprayer of the embodiment of the present invention can effectively avoid the situation of uneven distribution of pesticides, enhance the overall effect of pest control, reduce the risk of crop damage, optimize the use of pesticides, reduce unnecessary waste, and improve the overall pesticide application efficiency and economic benefits.

[0018] Therefore, the backpack powder sprayer according to the embodiment of the present invention has the advantages of good pesticide application consistency, high pesticide application efficiency and less pesticide application waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The figure is a schematic structural diagram of the backpack powder spraying machine provided by the present invention.

[0021] Figure 2 It is a structural schematic diagram of the backpack powder sprayer provided by the present invention at another viewing angle.

[0022] Figure 3 The present invention is a schematic structural diagram of a lower powder wheel and a lower powder bin of a backpack powder sprayer.

[0023] Reference numerals: 100. Backpack powder sprayer; 1. Body; 2. Powder bin; 3. Powder lowering parts; 31. Powder lowering bin; 32. Motor; 33. Powder lowering wheel; 34. Magnetic coupler; 35. Brush; 4. Powder spraying tube; 41. Powder outlet; 42. Handle; 5. Fan assembly; 51. Fuel tank; 52. Engine. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 3 As shown, the backpack powder sprayer 100 of the embodiment of the present invention includes a machine body 1, a powder bin 2, a powder lowering component 3, a powder spraying pipe 4, a fan assembly 5 and a controller, and the powder bin 2 is arranged on the top of the machine body 1.

[0026] The powder bin 2 is communicated with the lower powder component 3 so that powder can enter the lower powder component 3 .

[0027] The powder spraying pipe 4 is communicated with the lower powder component 3 , and the powder spraying pipe 4 can rotate relative to the lower powder component 3 .

[0028] The fan assembly 5 is communicated with the lower powder component 3 , and the airflow generated by the fan assembly 5 can spray the powder in the lower powder component 3 out of the powder spraying pipe 4 .

[0029] The controller can adjust the powder dispensing amount of the powder dispensing component 3 according to the moving speed of the backpack powder spraying machine 100 and the position and posture of the powder spraying tube 4 .

[0030] For example, for ease of description, the up and down directions are as follows Figure 1 shown.

[0031] The powder bin 2 is arranged above the lower powder component 3 , and the bottom of the powder bin 2 is communicated with the top of the lower powder component 3 , so that the powder in the powder bin 2 can enter the lower powder component 3 .

[0032] The lower powder component 3, the powder spraying pipe 4 and the fan assembly 5 are connected. For example, the lower powder component 3 includes a lower powder bin 31. A three-way bin is provided at the bottom of the lower powder bin 31. The three-way bin has three openings, which are respectively connected to the lower powder bin 31, the powder spraying pipe 4 and the fan assembly 5. Therefore, after the powder in the lower powder bin 31 falls into the three-way bin, it is sprayed out from the powder spraying pipe 4 under the action of the high-pressure airflow provided by the fan assembly 5.

[0033] The powder spraying tube 4 can rotate relative to the powder lowering component 3 , and the operator can move the position of the powder spraying tube 4 to apply the pesticide above the canopy or inside the canopy.

[0034] The backpack duster 100 of the embodiment of the present invention can adjust the powder amount of the powder lowering component 3 by the moving speed of the backpack duster 100 and the position of the powder spraying tube 4. For example, when the walking speed increases, in order to ensure the same amount of pesticide application per unit area, the powder lowering amount needs to be increased accordingly, and vice versa. When the powder spraying tube 4 points to the top of the canopy, the powder lowering amount is reduced to ensure that there is enough pesticide deposition on the upper part of the canopy. When the powder spraying tube 4 points to the inside of the canopy, because it needs to be diffused to both sides at this time, the amount of pesticide consumption is large, so the powder lowering amount is increased to ensure that the middle and lower parts of the canopy can also be sufficiently covered with pesticides to prevent diseases and insect pests.

[0035] In the related art, when the backpack duster 100 applies pesticides to taller plants, it can often only apply pesticides above the canopy, resulting in insufficient pesticide deposition in the middle and lower parts of the canopy, seriously affecting the effect of pest control. Even if attempts are made to apply pesticides to the middle and lower parts of the canopy, it is difficult to ensure the consistency of the application due to the lack of a precise control mechanism. This not only causes uneven distribution of the pesticide, but also further weakens the control effect, making it impossible to effectively control pests and diseases in some areas, increasing the risk of crop damage, and also causing waste due to improper use of pesticides, reducing the overall efficiency of pesticide application and economic benefits.

[0036] In the backpack powder spraying machine 100 of the embodiment of the present invention, the powder spraying tube 4 can rotate relative to the powder lowering component 3, and the operator can move the position of the powder spraying tube 4 to apply the pesticide above the canopy or inside the canopy.

[0037] The backpack duster 100 of the embodiment of the present invention dynamically adjusts the powder amount of the powder discharging component 3 by the moving speed of the backpack duster 100. This design ensures that the amount of pesticide applied per unit area remains consistent regardless of the walking speed, and there is no need to manually adjust the amount of pesticide applied, thereby achieving consistency and uniformity in the application of pesticides. Moreover, by adjusting the amount of powder discharging by obtaining the position of the powder spraying tube 4, an ideal coverage effect can be achieved when applying pesticides at different positions (such as above or inside the canopy). In addition, the backpack duster 100 of the embodiment of the present invention adjusts the amount of pesticide applied by a controller, thereby improving the efficiency of pesticide application.

[0038] The backpack powder sprayer 100 of the embodiment of the present invention can effectively avoid uneven distribution of pesticides, enhance the overall effect of pest control, reduce the risk of crop damage, optimize the use of pesticides, reduce unnecessary waste, and improve the overall pesticide application efficiency and economic benefits.

[0039] Therefore, the backpack powder sprayer 100 of the embodiment of the present invention has the advantages of good pesticide application consistency, high pesticide application efficiency and less pesticide application waste.

[0040] In some embodiments, Figure 1 As shown, the powder spraying tube 4 includes a powder outlet 41 and a handle 42 . The handle 42 is arranged on the outer peripheral side of the powder spraying tube 4 . A posture sensor is arranged on the handle 42 . The posture sensor is used to detect the position of the powder outlet 41 .

[0041] A handle 42 is arranged on the outer peripheral side of the powder spraying tube 4 and adjacent to the powder outlet 41, so that the operator can hold and control the powder spraying direction. A posture sensor is provided on the handle 42, and the posture sensor is used to detect the position of the powder outlet 41 in real time, so that the controller can dynamically adjust the amount of powder according to the angle and direction of the powder outlet 41, ensuring that the ideal pesticide deposition effect can be achieved at different application positions. For example, when the powder spraying tube 4 points to the top of the canopy, excessive application of pesticide is avoided by reducing the amount of powder, and when it points to the inside of the canopy, the amount of powder is increased to ensure that the diffusion requirements on both sides are met. This design not only improves the accuracy and uniformity of application, but also further enhances the effect of pest control, making the entire application process more intelligent and efficient, and effectively solving the problem that traditional powder spraying equipment is difficult to achieve precise control, thereby improving operation efficiency and resource utilization.

[0042] Optionally, the angle range of the powder outlet 41 is pre-divided into a plurality of intervals, each interval corresponding to a powder discharge amount, and when the backpack powder sprayer 100 is working, the controller determines the corresponding powder discharge amount according to the posture information fed back by the posture sensor.

[0043] In some embodiments, the backpack duster 100 further includes a speed sensor, which is disposed on the machine body 1 to detect the moving speed of the backpack duster 100 .

[0044] The speed sensor is arranged on the body 1 so as to detect the moving speed of the operator. By real-time monitoring the changes in walking speed, the controller can dynamically adjust the powder dispensing amount of the powder dispensing component 3 to ensure that the amount of pesticide applied per unit area remains consistent regardless of whether the movement is fast or slow. This precise speed response mechanism not only improves the uniformity and efficiency of pesticide application, but also avoids the problem of pesticide waste or insufficient application caused by changes in walking speed, further enhances the effect of pest control, and makes the entire pesticide application process more intelligent and precise, thereby improving work efficiency and resource utilization.

[0045] In addition, the combined use of speed sensors and attitude sensors enables comprehensive control of multiple variables during the application process, greatly optimizing the distribution of pesticides, reducing environmental impacts, and protecting crop health.

[0046] In some embodiments, Figure 2As shown, the lower powder component 3 includes a lower powder bin 31, a motor 32 and a lower powder wheel 33. The top of the lower powder bin 31 is connected to the bottom of the powder bin 2. The lower powder wheel 33 is rotatably arranged in the lower powder bin 31. The motor 32 can drive the lower powder wheel 33 to rotate. A plurality of grooves are arranged on the outer peripheral surface of the lower powder wheel 33.

[0047] For example, the lower powder wheel 33 is rotatably disposed in the lower powder bin 31 and is driven to rotate by the motor 32. This design not only ensures the continuity and stability of the powder feeding process, but also allows the operator to adjust the powder feeding rate according to actual needs, thereby further improving the flexibility and accuracy of pesticide application. A plurality of grooves are provided on the outer peripheral surface of the lower powder wheel 33, which are used to accommodate a certain amount of pesticide powder. As the lower powder wheel 33 rotates, the pesticide powder in the grooves is brought downward and blown out by the high-pressure airflow generated by the fan, thereby achieving uniform spraying.

[0048] In addition, the design of the lower powder wheel 33 takes maintenance convenience into consideration, and a rotating cover is provided on the lower powder bin 31 near it, so that the operator can open it and take out the lower powder wheel 33 for cleaning or replacement, thereby preventing blockage or agglomeration problems caused by long-term use, thereby ensuring that the backpack powder sprayer 100 can operate stably for a long time and improving the overall work efficiency and application effect.

[0049] Alternatively, if Figure 3 As shown, a brush 35 is provided under the lower powder wheel 33. The brush 35 cleans the powder wheel during the rotation of the lower powder wheel 33, effectively preventing the pesticide powder from agglomerating due to humidity or other factors during long-term use, ensuring that the powder can smoothly fall from the groove into the fan outlet and be blown out, thereby improving the stability and reliability of the equipment operation.

[0050] In some embodiments, the powder discharge amount Q of the powder discharge component 3 is: Q = Nms; Q is the powder feeding amount, unit is g / s.

[0051] N is the number of grooves.

[0052] m is the powder capacity of each groove, in g.

[0053] s is the rotation speed of the lower powder wheel 33, and the unit is revolutions / s.

[0054] The backpack powder sprayer 100 of the embodiment of the present invention can adjust the speed of the lower powder wheel 33 and then adjust the powder amount by adjusting the speed of the motor 32 according to the above formula, so that the operator can adjust the speed of the motor 32 and select the appropriate design of the lower powder wheel 33 according to actual needs to achieve the best pesticide application effect, which not only improves the consistency and uniformity of pesticide application, but also optimizes the use of pesticides, reduces waste, and further improves the effect of pest control.

[0055] In some embodiments, the speed r of the motor 32 is:

[0056] Wherein, r is the rotation speed of the motor 32, in revolutions per second. It is understandable that the rotation speed of the motor 32 is the same as the rotation speed of the lower powder wheel 33, that is, s=r.

[0057] v is the moving speed of the backpack duster 100, and the unit is m / s.

[0058] W is the powder spraying distance, in m, A is the amount of powder applied per unit area, in g / m 2 .

[0059] N is the number of grooves.

[0060] m is the powder capacity of each groove, in g.

[0061] k is a variable coefficient. When the posture sensor detects that the powder outlet 41 is at the top of the canopy, k=k1. When the posture sensor detects that the powder outlet 41 is at both sides of the canopy, k=k2, wherein k2>k1.

[0062] For example, W is the powder spraying distance. Considering that the powder has a good dispersion effect, W is the width of the greenhouse perpendicular to the walking direction, that is, the road in the greenhouse is generally along its length, so W is the width of the greenhouse.

[0063] k is a variable coefficient, and the values ​​of k1 and k2 can be designed according to actual needs. For example, k2 is twice k1, k1=1, k2=2.

[0064] In some embodiments, the lower powder component 3 includes a magnetic coupler 34 , and the motor 32 drives the lower powder wheel 33 to rotate via the magnetic coupler 34 .

[0065] For example, the non-contact power transmission characteristics of the magnetic coupling 34 not only effectively avoid the wear and failure problems that may be caused by traditional mechanical connections, but also improve the reliability and durability of the system, so that the backpack powder sprayer 100 can maintain stable performance during long-term operation; the use of the magnetic coupling 34 simplifies the maintenance process, reduces the need for repairs due to aging or damage of mechanical parts, and further improves the convenience of operation.

[0066] In some embodiments, Figure 1 As shown, the fan assembly 5 includes an oil tank 51, an engine 52 and a fan. The oil tank 51 supplies oil to the engine 52 so as to drive the fan to operate.

[0067] For example, the fan assembly 5 includes a fuel tank 51, an engine 52 and a fan, wherein the fuel tank 51 supplies fuel to the engine 52 to drive the fan to operate. This design ensures that the equipment has a sufficient power source, so that the fan can work stably under various operating conditions, provide continuous and strong airflow, and effectively transport the pesticide powder from the powder lowering component 3 to a distant place and achieve uniform spraying over a large area.

[0068] Optionally, the oil tank 51 is disposed at the bottom of the machine body 1 .

[0069] In some embodiments, the backpack powder sprayer 100 further includes a distance sensor and a controller. The distance sensor is disposed at the powder outlet 41 , and the distance sensor and the fan assembly 5 are both electrically connected to the controller.

[0070] If the distance measuring sensor detects that there are plants within the preset range from the powder outlet 41, the controller controls the fan assembly 5 to reduce the wind speed.

[0071] For example, a distance sensor is provided at the powder outlet 41 for real-time monitoring of the environmental conditions in front of the powder outlet 41. The distance sensor and the fan assembly 5 are electrically connected to the controller to form an intelligent feedback control system. When the distance sensor detects that there are plants within a preset range (e.g., 3 meters) from the powder outlet 41, the signal is immediately transmitted to the controller. The controller responds quickly according to the received information and reduces the wind speed of the fan assembly 5 by adjusting the working state of the engine 52 to prevent strong winds from injuring nearby plants and to avoid pesticide powder from being directly blown onto the plants to cause pesticide damage. This design not only effectively protects crops from mechanical damage and the risk of over-application of pesticides, but also improves the safety and accuracy of the application process, ensures that the pesticide can be more evenly distributed in the target area, and enhances the overall effect of pest control.

[0072] The powder spraying method of the embodiment of the present invention comprises: The moving speed of the backpack duster 100 is acquired.

[0073] The position and posture of the powder outlet 41 of the powder spraying pipe 4 of the backpack powder spraying machine 100 are obtained.

[0074] The powder discharge amount of the powder discharge component 3 is controlled according to the moving speed and the position of the powder discharge port 41 .

[0075] Specifically, the speed sensor integrated on the body 1 is used to obtain the operator's moving speed in real time, and the posture sensor (such as a gyroscope) provided on the handle 42 of the powder spraying tube 4 is used to accurately detect the angle and direction of the powder outlet 41. These two sets of data are transmitted to the controller for comprehensive analysis and processing. The controller dynamically adjusts the rotation speed of the motor 32 driving the lower powder wheel 33 according to the walking speed of the operator to ensure that the pesticide application amount per unit area remains consistent regardless of the travel speed, and further optimizes the powder application amount according to the specific posture of the powder outlet 41. For example, when the powder outlet 41 points to the top of the canopy, the powder application amount is reduced to avoid excessive application of pesticides, and when it points to the inside of the canopy, the powder application amount is increased to meet the diffusion requirements on both sides, thereby achieving a high degree of uniformity and consistency in the distribution of pesticides throughout the operation process, which not only improves the effect of pest control, but also reduces the waste of pesticides, and enhances the efficiency and economic benefits of pesticide application.

[0076] The powder spraying method of the embodiment of the present invention has the advantages of good pesticide application consistency, high pesticide application efficiency and less pesticide application waste.

[0077] A specific embodiment of the backpack powder spraying machine 100 according to the embodiment of the present invention is described below.

[0078] The pesticide application effect test was carried out in a greenhouse with mature cucumbers (about 1.8m high). Five deposition test points were selected in the greenhouse using the five-point sampling method, and three cucumbers were selected at each test point for deposition test. Sticky dust counting cards were arranged with clips at the upper, middle and lower heights of the plants to be tested, and then the backpack duster 100 of the embodiment of the present invention was used to carry out the pesticide application test. After the pesticide powder was settled for four hours, the dust counting cards were recovered, and the particles were counted under a stereoscope to calculate the pesticide powder deposition amount (unit: pieces / cm 2 ).

[0079] The experimental results show that the average deposition amount in the upper canopy layer is 1674±354 / cm 2 The average deposition in the middle layer of the canopy is 2170±395 per cm 2 The average deposition in the lower canopy layer was 1469±367 per cm 2 , space application above the canopy and increasing the application rate in the gaps between the canopy can meet the control requirements, and there is still enough pesticide deposition in the middle and lower parts of the canopy.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A backpack powder sprayer, characterized in that: include: Body; A powder bin, the powder bin being arranged on the top of the machine body; A powder lowering component, the powder bin is in communication with the powder lowering component so that powder can enter the powder lowering component; A powder spraying pipe, the powder spraying pipe is connected to the lower powder component, and the powder spraying pipe can rotate relative to the lower powder component; A fan assembly, the fan assembly is connected to the powder lowering component, and the airflow generated by the fan assembly can spray the powder in the powder lowering component out of the powder spraying pipe; A controller is provided, wherein the controller can adjust the powder discharging amount of the powder discharging component according to the moving speed of the backpack powder spraying machine and the posture of the powder spraying tube.

2. The backpack dust sprayer according to claim 1, characterized in that: The powder spraying tube comprises a powder outlet and a handle, wherein the handle is arranged at the outer peripheral side of the powder spraying tube, and a posture sensor is arranged on the handle, and the posture sensor is used to detect the position and posture of the powder outlet.

3. The backpack dust sprayer according to claim 2, characterized in that: The backpack duster further comprises a speed sensor, which is arranged on the machine body so as to detect the moving speed of the backpack duster.

4. The backpack dust sprayer according to claim 2, characterized in that: The lower powder component includes a lower powder bin, a motor and a lower powder wheel. The top of the lower powder bin is connected to the bottom of the powder bin. The lower powder wheel is rotatably arranged in the lower powder bin. The motor can drive the lower powder wheel to rotate. A plurality of grooves are arranged on the outer peripheral surface of the lower powder wheel.

5. The backpack dust sprayer according to claim 4, characterized in that: The powder discharge amount Q of the powder discharge component is: Q = Nms; Q is the powder feeding amount, unit is g / s; N is the number of the grooves; m is the powder capacity of each groove, in g; s is the rotation speed of the lower powder wheel, in revolutions / s.

6. The backpack dust sprayer according to claim 5, characterized in that: The speed r of the motor is: ； Wherein, r is the rotation speed of the motor, in revolutions per second; v is the moving speed of the backpack powder sprayer, in m / s; W is the powder spraying distance, in m, A is the amount of powder applied per unit area, in g / m 2 ; N is the number of the grooves; m is the powder capacity of each groove, in g; k is a variable coefficient. When the posture sensor detects that the powder outlet is at the top of the canopy, k=k1; when the posture sensor detects that the powder outlet is at both sides of the canopy, k=k2, wherein k2>k1.

7. The backpack dust sprayer according to claim 4, characterized in that: The lower powder component includes a magnetic coupler, and the motor drives the lower powder wheel to rotate through the magnetic coupler.

8. The backpack dust sprayer according to claim 1, characterized in that: The blower assembly comprises an oil tank, an engine and a blower, wherein the oil tank supplies oil to the engine so as to drive the blower to operate.

9. The backpack dust sprayer according to claim 2, characterized in that: It also includes a distance sensor, which is arranged at the powder outlet, and the distance sensor and the fan assembly are electrically connected to the controller; If the distance measuring sensor detects that there are plants within a preset range from the powder outlet, the controller controls the fan assembly to reduce the wind speed.

10. A powder spraying method using the backpack powder spraying machine according to any one of claims 1 to 9, characterized in that: include: Obtaining the moving speed of the backpack dust sprayer; Obtaining the position of the powder outlet of the powder spraying pipe of the backpack powder spraying machine; The powder discharging amount of the powder discharging component is controlled according to the moving speed and the position of the powder outlet.

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