JP3208190B2 - Haze control method for chemicals - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling fumes of chemicals, which is particularly effective in controlling house (greenhouse), has excellent efficiency of attaching chemicals to cultivated plants, and is more economical. It is characterized by.

[0002]

2. Description of the Related Art Conventionally, control in a house as described above tends to be unmanned in order to avoid adverse effects on workers due to the application of chemicals (pesticides, fungicides, etc.). It has been a problem how to perform uniform spraying (JP-A-60-48159, JP-A-60-61159).
No. 224,928).

Further, in order to solve the above-mentioned problem, various electrostatic spraying methods have been proposed (JP-A-61-41632, JP-A-61-227864, JP-A-Heisei 1-3).
No. 4661). The electrostatic spraying method is devised such that a charge (static electricity) is applied to the sprayed chemical liquid particles so that the chemical liquid sufficiently adheres to the back of a leaf or the like of a cultivated vegetable or the like.

[0004] Further, in any of the above cases, it is said that the control effect is enhanced by dispersing a small amount of fine chemicals into fine particles and spraying them in a small amount to fill the house.

[0005]

At present, all pesticides approved for use in the method for controlling fumes of chemicals such as the present invention are fungicides except one kind of pesticides. In other words, a pesticide can be expected to have a predetermined medicinal effect against pests even if it does not adhere to the back of a cultivated plant, etc. No effect can be expected.

Therefore, the electrostatic spraying method is expected. As described above, the electrostatic spraying method applies a charge to the sprayed chemical liquid particles to suction and adhere the chemical liquid to the cultivated plant as an earth, and the chemical liquid is also adhered to the back of the leaf.

[0007] However, in the conventional electrostatic spraying method, charge is applied to the chemical liquid particles by 2 KV to 10 KV.
Although the operation was performed at a high voltage of V or higher, not only was the adhesion efficiency to the cultivated plant unsatisfactory, but also the risk of electric shock was high. Therefore, the present inventor repeatedly performed various experiments to confirm the conventional adhesion efficiency and improve the adhesion efficiency.

[0008] As a result, in the conventional method of applying electric charge to chemical liquid particles by a high voltage, the amount of electric charge applied to the chemical liquid particles is too large, and the chemical liquid is concentrated on the cultivated plant near the spraying site, including the back of leaves. The fact was found that the particles adhered and the scattering of the chemical liquid particles was small. Therefore, even in the conventional type, a predetermined effect can be obtained by moving the spray nozzle (spray device) in the house. However, providing an automatic moving (running) device for the spray nozzle (spray device) causes an extremely large cost increase.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an electric charge at a voltage of 300 to 800 V to fine particles of a chemical solution to spray and spray.

[0010]

The present invention is a fog spray, so that the chemical solution is atomized to 10 to 20 microns, and the apparatus is placed at a predetermined position in the house. Note that a plurality of the above devices are placed in the house according to the size of the house.

Then, an electric charge is applied to the chemical liquid particles sprayed from the spray nozzle of the apparatus at a voltage of 300 to 800 V and sprayed into the house. The sprayed chemical liquid particles float in the air in the house and become filled in the house by natural convection (generated immediately after sunset, etc.) or artificial convection. It can be uniformly and efficiently attached.

The voltage value for imparting an electric charge to the drug solution fine particles is determined by attaching a droplet adhesion detection paper to a cultivated plant,
It was obtained as a result of repeating various experiments,
At V or lower, no adhesion to the back of the leaf was performed, and at 800 V or higher, uniform spraying and floating effects could not be obtained.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; The illustrated embodiment shows a small, portable, fixed-position fume spreader, unlike conventional devices of this type. In the figure, reference numeral 1 denotes a round-bottomed chemical solution tank in consideration of the stirring effect by convection, 2 denotes a two-fluid spray nozzle which is provided to protrude outward from a lid portion 3 covering the upper portion of the chemical solution tank 1, and 4 denotes the same lid. A supply section for supplying compressed air from the supply section 4 to the spray nozzle 2 and the chemical liquid tank 1 by supplying compressed air from the supply section 4 to the chemical liquid tank 1 The suction nozzle 5 is suctioned, fed and pressurized, and becomes a fume with compressed air from the spray nozzle 2 and sprayed into the house.

The specific configuration will be described below. The bottom portion 6 of the chemical liquid tank 1 is formed in a round bottom shape for the purpose of stirring and preventing the chemical solution from remaining, and a stationary base portion is provided outside the round bottom shape bottom portion 6. 7 are provided. Further, a radial discharge port 8 for air for agitation and pressurization of the chemical liquid and a suction port 9 for the chemical liquid 5 to which a part of the compressed air is supplied to the lowest part of the round bottom 6.
Is disposed below the lower surface with a strainer 33 interposed therebetween.

That is, an inner lid 10 for sealing the upper end of the chemical tank 1 is provided, and a supply path for the stirring and pressurizing air from the center of the inner lid 10 to the round bottom 6 of the chemical tank 1. 11 and a chemical solution supply path 12 are provided as a double pipe structure, the space between the outer pipe 13 and the inner pipe 14 is the supply path 11 for the stirring and pressurizing air, and the inside of the inner pipe 14 is the chemical solution supply path 12. ing.

Further, the upper end of the supply path 11 for the stirring and pressurizing air and the supply section 4 for the compressed air are formed by a pressurized air supply pipe 15, a branch joint 16, a first branch pipe 17 and a flow control valve 18. The upper end of the chemical solution supply path 12 is communicated with a liquid discharge hole (not shown) of the spray nozzle 2 by a liquid supply pipe 19. Furthermore, the space between the compressed air supply unit 4 and the air ejection slit (not shown) of the spray nozzle 2 communicates via the pressurized air supply line 15, the branch joint 16, and the second branch line 20. Let me do.

FIG. 2 is a plan view of the compressed air supply section 4. That is, this is an embodiment of the configuration between the compressed air supply unit 4 and the pressurized air supply line 15,
In the figure, 21 is a pressurized air supply cock, 22 is a pressure regulation.
Reference numeral 23 denotes a pressure gauge.

FIG. 3 shows an example of an apparatus for applying a charge to the chemical liquid particles sprayed from the spray nozzle 2. That is, a cap 31 made of a hard-to-charge material in which a brass ring 25 is embedded at the tip end of the nozzle body 24 of the spray nozzle 2 is screwed and disposed with respect to the nozzle body 24 at a variable distance, and the push screw 30 is set. A predetermined voltage, that is, a voltage of 300 to 800 V is applied from a DC power supply 34 having an appropriate output voltage, which is connected to a lead line 26 via the power supply. In FIG. 1, 27 is a portable handle, 28 is a fixture for the lid 3, and 32 is a liquid feed shutoff cock.

In the apparatus having the above-described structure, a pipe 29 from a compressor (not shown) serving as a compressed air supply source is connected to the compressed air supply section 4. When the pressurized air supply cock 21 is opened, air at a predetermined pressure is supplied from the pressurized air supply line 15 to the branch joint 16 via the pressure regulator 22, and most of the air flows through the second branch line 20. The air is supplied to the air ejection slit of the spray nozzle 2 through the nozzle.

As a result, the air in the liquid supply pipe line 19 and the chemical liquid supply path 12 communicated with the liquid discharge hole of the spray nozzle 2 is induced and discharged, and the inside of the liquid supply pipe line 19 and the chemical liquid supply path 12 becomes negative. The pressure becomes a pressure, and the chemical solution in the chemical solution tank 1 is sucked from the chemical solution suction port 9, and eventually reaches the spray nozzle 2, and is mixed with the diffusion jet of the compressed air, and the chemical solution is atomized and sprayed, and passes through the brass ring 25. At this time, an appropriate amount of electric charge is imparted to the chemical liquid spray particles and diffused, and dispersed and suspended in the air.

At the same time, a part of the compressed air passes from the branch joint 16 through the first branch pipe 17, the flow control valve 18, and the compressed air supply path 11 to the stirring and pressurizing air discharge port 8, and the chemical solution The chemical solution 5 is supplied into the gaseous solution 5 and agitates the chemical solution 5 as bubbles to prevent the precipitation of the chemical and the like, and is stored between the upper surface of the chemical solution 5 and the inner lid 10 to pressurize the chemical solution 5 and spray the chemical solution 5 The pressure is fed to the nozzle 2.

[0022]

According to the present invention, the efficiency of adhering a chemical solution to a cultivated plant can be improved, and the device only needs to be placed at a predetermined position in the house. In addition, the operating voltage is low and safe and economical.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an example of a fogging machine used for carrying out the present invention.

FIG. 2 is a plan view of a compressed air supply unit of FIG.

FIG. 3 is a sectional view showing an example of a spray nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chemical liquid tank 2 Spray nozzle 6 Round-bottomed bottom 7 Stationary stand part 8 Discharge port of air for stirring and pressurizing 9 Chemical liquid suction port 13 Outer pipe 14 Inner pipe

Continuation of the front page (56) References JP-A-56-82041 (JP, A) JP-A-52-30667 (JP, A) JP-A-61-162124 (JP, A) JP-A-56-85233 (JP, A) , A) Fully open 1987-31956 (JP, U) Fully open 1987-31955 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01M 13/00 B05B 17/00 B05B 5/00 JICST file (JOIS)

Claims (1)

(57) [Claims] 1. A method for controlling fumes in a chemical solution, wherein a charge is applied to the fine particles of the chemical solution with a voltage of 300 to 800 V to spray and diffuse the fine particles.