JPWO2019123939A1 - Chemical spraying method - Google Patents

Abstract

The chemical spraying method consists of a first step (S10) in which the inside of the chemical spraying area (inside the house body (10)) is preliminarily filled with mist, and after the first step (S10), the chemical is filled with mist. Includes a second step (S20) of spraying the drug into the drug spraying area.

Description

The present invention relates to a chemical spraying method, particularly to a chemical spraying method in an agricultural greenhouse.

In order to control the environment for growing plants such as agricultural products, an agricultural house composed of a hut (house body) called a vinyl house or a pipe house is used. In this kind of greenhouse, while allowing sunlight to enter and taking in the external environment, by controlling the internal environment of the greenhouse such as temperature, humidity or illuminance, it is suitable for growing plants. We are building an environment.

In an agricultural greenhouse, the space for cultivating plants is a closed space, so once a disease occurs, the disease may spread throughout the agricultural greenhouse and the plants may be wiped out. Therefore, conventionally, in agricultural greenhouses, chemicals are sprayed in order to control diseases (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-104497

However, when spraying a chemical in an agricultural greenhouse, it is difficult to spray an appropriate amount of the chemical, and in order to obtain a sufficient effect of the chemical, the chemical is often sprayed in an amount larger than necessary. For this reason, an excessive amount of the chemical is sprayed, which adversely affects the human body of the worker and puts a burden on the environment.

In addition, it is desirable that the drug is attached to the back of the leaf and the vicinity of the growth point of the plant, but in order to attach the drug to the back of the leaf and the vicinity of the growth point of the overgrown plant, the operator artificially varies. It is necessary to spray the drug locally so that the drug adheres to the place where the drug is to be sprayed by moving the nozzle of.

The present invention has been made to solve such a problem, and it is possible to obtain a sufficient drug effect with as little drug amount as possible, and near the leaf back and the growth point of a prosperous plant. It is an object of the present invention to provide a drug spraying method capable of easily adhering a drug.

One aspect of the drug spraying method according to the present invention is a first step in which the inside of the drug spraying area is preliminarily filled with mist, and after the first step, the drug is placed in the drug spraying area in the state of being filled with mist. Includes a second step of spraying on.

A sufficient drug effect can be obtained with as little drug amount as possible, and the drug can be easily adhered to the back of a leaf and the vicinity of a growth point of a prosperous plant.

FIG. 1 is a perspective view schematically showing the appearance of the agricultural greenhouse according to the embodiment. FIG. 2 is a schematic horizontal sectional view schematically showing an agricultural house according to an embodiment. FIG. 3 is a schematic cross-sectional view schematically showing the agricultural house according to the embodiment. FIG. 4 is a partially enlarged view of the inside of the agricultural greenhouse according to the embodiment. FIG. 5 is a flowchart of the drug spraying method according to the embodiment. FIG. 6 is a diagram for explaining a first step in the chemical spraying method according to the embodiment. FIG. 7 is a diagram for explaining a second step in the chemical spraying method according to the embodiment.

Hereinafter, embodiments of the present invention will be described. In addition, all the embodiments described below show a specific example of the present invention. Therefore, the numerical values, the components, the arrangement positions and connection forms of the components, the steps (steps), the order of the steps, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. .. Therefore, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept of the present invention will be described as arbitrary components.

Further, each figure is a schematic view and is not necessarily exactly illustrated. In each figure, substantially the same configuration is designated by the same reference numerals, and duplicate description will be omitted or simplified.

(Embodiment)
First, before explaining the chemical spraying method according to the embodiment, the configuration of the agricultural house 1 in which the chemical spraying method is used will be described with reference to FIGS. 1 to 4. FIG. 1 is a perspective view schematically showing the appearance of the agricultural house 1 according to the embodiment. 2 and 3 are a schematic horizontal sectional view and a schematic cross-sectional view schematically showing the agricultural house 1. FIG. 4 is a partially enlarged view of the agricultural house 1. Note that FIG. 1 does not show the plant 2.

As shown in FIGS. 1 to 4, the agricultural house 1 is a plant growing facility for growing a plant 2, and is a house main body as an outer shell configured to surround a space for cultivating the plant 2. Has 10. In the present embodiment, the house body 10 is a closed space, and can be made into a closed space by closing all the openings such as the vents 13.

As shown in FIG. 1, the house main body 10 has a frame 11 and a covering body 12 supported by the frame 11. The top view shape of the house body 10 is a rectangular shape having a large aspect ratio. As an example, the dimensions of the house body 10 are about several tens of meters (for example, 50 m) in the longitudinal direction and about several meters (for example, 5 m) in the lateral direction when viewed from above. Further, the house main body 10 is configured to have a shape that is convex upward in a cross section that intersects in the longitudinal direction.

The frame 11 is formed by combining a plurality of pipes which are frame structural materials. Specifically, the frame 11 has a plurality of arch-shaped first pipes 11a (main frame) and a plurality of second pipes 11b (connecting frames) for connecting the plurality of first pipes 11a. The first pipe 11a and the second pipe 11b are metal pipes, and are made of, for example, an aluminum material or a steel material. The first pipe 11a and the second pipe 11b are not limited to metal, but may be made of resin or wood.

The covering body 12 is erected on the frame 11 so as to cover the entire frame 11. The covering body 12 is composed of a translucent member such as a glass plate or a synthetic resin film. The covering body 12 may be made of a transparent member such as transparent glass or a transparent resin film.

A part of the covering body 12 is provided with openings such as a vent 13 which is an opening for ventilation and an entrance 14 which is an opening for a person to enter and exit the house main body 10. The vent 13 is provided, for example, on the side wall or ceiling of the house body 10. Further, the doorway 14 is provided on the gable wall of the house main body 10.

Further, the house main body 10 is provided with a window 15 for opening and closing the vent 13. The window 15 has a structure that can be moved between a closed position that covers the vent 13 and an open position that opens the vent 13. Specifically, the window 15 has a structure in which a transparent sheet is wound around a shaft, and the opening degree of the vent 13 can be adjusted according to the amount of the sheet wound around the shaft. That is, the window 15 and the vent 13 are ventilation windows for ventilating the air inside and outside the house body 10. The upper end of the sheet 15 is attached to the house body 10, and the window 15 is arranged so that the shaft is located below the portion where the sheet is attached to the house body 10.

Further, the house main body 10 is also provided with a light-shielding curtain 16 for adjusting the solar radiation incident on the house main body 10. The light-shielding curtain 16 can be moved between a position where the external light (for example, sunlight) incident on the house body 10 is dimmed and a position where the external light incident on the house body 10 is not dimmed. There is.

In the agricultural house 1, agricultural products are cultivated as a plant 2. The plant body 2 is, for example, fruit vegetables, leaf vegetables, root vegetables, beans, fruits, flowers and the like. Examples of fruit vegetables are tomatoes, cucumbers, eggplants and the like. Leafy vegetables include, for example, spinach, Japanese mustard spinach, lettuce, cabbage, Chinese cabbage and the like. Root vegetables include, for example, radish, carrot, burdock, potato, sweet potato, lotus root, taro and the like.

In this embodiment, an example of cultivating fruit vegetables, particularly tomatoes, as the plant 2 will be described. Therefore, in FIGS. 2 to 4, tomato stems, leaves, and the like are shown as the plant 2.

On the ground surrounded by the house main body 10, a plurality of ridges 3 (two in the present embodiment) are provided in which the soil is raised with respect to the surroundings in order to cultivate the plant body 2. Further, between the adjacent ridges 3, there is a passage 4 which serves as a passage and a work space for the user.

A plurality of plant bodies 2 are planted at substantially equal intervals in each of the plurality of ridges 3. Examples of the method of planting the plant 2 in the ridge 3 include single-row planting and double-row planting, but other planting methods may be used. Although one type of plant 2 is planted in the ridge 3 in one house main body 10, a plurality of types of plant 2 may be planted.

As shown in FIGS. 2 to 4, the agricultural house 1 includes a mist spraying unit 100, a pipe 200, a tank 300, a temperature measuring unit 400, and a control unit 500. The mist spraying unit 100, the pipe 200, the tank 300, the temperature measuring unit 400, and the control unit 500 are installed in the house main body 10.

The mist spraying unit 100 is a mist sprayer that sprays mist into the house body 10. Specifically, the mist spraying unit 100 is a nozzle that generates mist and ejects it to the outside.

A plurality of mist spraying units 100 are installed in the house main body 10. Each of the plurality of mist spraying units 100 is connected to the pipe 200, and the liquid is supplied to each mist spraying unit 100 through the pipe 200. The plurality of mist spraying units 100 atomize the liquid supplied through the pipe 200 into fine particles to generate mist, and eject the generated mist to the outside. As shown in FIG. 4, each mist spraying unit 100 has one or more outlets for ejecting the generated mist to the outside. The mist ejected from the outlet 110 is blown out so as to spread from the outlet 110.

Each mist spray unit 100 has four outlets 110. Specifically, each mist spraying unit 100 has four branch pipes 120. The four outlets 110 are provided at the tips of the four branch pipes 120. In each mist spraying unit 100, the four branch pipes 120 are arranged at 90 degree intervals in the horizontal plane. Further, the outlet 110 in each branch pipe 120 faces in the horizontal direction. The outlet 110 is not limited to the case where it is oriented in the horizontal direction, and may be directed vertically upward or vertically downward.

In the present embodiment, the mist spraying unit 100 sprays the mist on the plant 2. That is, the mist spraying unit 100 not only introduces the mist into the space inside the house main body 10, but also directly sprays the mist onto the plant 2. Therefore, it is preferable that the mist spraying unit 100 is arranged so as to generate mist at a position higher than that of the plant 2. In the present embodiment, the mist spraying portion 100 is arranged above the plant body 2, that is, above the ridges 3, but may be arranged above the passage 4. As an example, the height from the ground (upper surface of the ridge 3) where the plant 2 is cultivated to the mist spraying portion 100 is determined according to the height of the type of the plant 2, but is approximately 50 cm to 300 cm.

Further, in the present embodiment, the chemical solution or water is supplied to the mist spraying unit 100 through the pipe 200. Therefore, the mist spraying unit 100 sprays the drug mist, which is a fine particle of the chemical solution containing the drug, or the water mist, which is a fine particle of water, as the mist. The chemical contained in the chemical solution may be, for example, a chemical for controlling a disease used for controlling a disease of a plant 2 or a chemical for controlling a pest used for controlling a pest of a plant 2. It may be a drug containing both of them. The drug is not limited to the control of pests, and may be other drugs such as a growth drug that promotes the growth of the plant 2.

The pipe 200 constitutes a flow path for supplying a liquid from the tank 300 to the mist spraying unit 100. In the present embodiment, the mist spraying unit 100 is supplied with a chemical solution or water. The chemical solution supplied to the mist spraying unit 100 is an aqueous solution containing a chemical useful for the plant 2. The water supplied to the mist spraying unit 100 is, for example, rainwater, river water, well water or the like as raw water, or tap water.

The pipe 200 is piped so as to pass above the ridge 3 in a straight line along the longitudinal direction of the ridge 3. In the present embodiment, the pipe 200 is piped in a square shape, and connects the two main pipes 200a passing above each of the two ridges 3 and the ends of the two main pipes. It has a connecting pipe 200b. A plurality of mist spraying portions 100 are attached to the main pipe 200a at equal intervals. The layout of the pipe 200 is not limited to the one-stroke square shape, and may be configured to branch into each ridge 3 from the connecting pipe 200b (header) on the tank 300 side.

Further, a pump 210 and a valve 220 are provided in the flow path for supplying the liquid from the tank 300 to the mist spraying unit 100. Therefore, the pipe 200 is connected to the pump 210.

The pump 210 is, for example, a boosting pump, and applies water pressure to the liquid (chemical solution or water) stored in the tank 300 to supply the pipe 200. That is, the pump 210 pressurizes the liquid in the tank 300 and supplies it to the pipe 200. As a result, the pressurized liquid is supplied to the pipe 200. Then, when the pressurized liquid is supplied to the mist spraying unit 100 attached to the pipe 200, the mist is sprayed from the mist spraying unit 100. By adjusting the pressure of the liquid with the pump 210, the spray pressure of the mist sprayed from the mist spray unit 100 can be adjusted.

Further, the valve 220 is arranged between the pump 210 and the pipe 200, and adjusts the flow rate of the liquid supplied from the tank 300 to the mist spraying unit 100. Specifically, the flow rate of the liquid supplied to the mist spraying unit 100 can be adjusted by adjusting the opening degree of the valve 220. By adjusting the pressure of the liquid by the pump 210 instead of adjusting the opening degree of the valve 220, the flow rate of the liquid supplied to the mist spraying unit 100 can be adjusted as a result.

Further, by adjusting the pressure of the liquid by the pump 210 instead of adjusting the opening degree of the valve 220, the flow rate of the liquid supplied to the mist spraying unit 100 can be adjusted as a result.

By providing the pressure control valve in the valve 220, the pressure of the liquid supplied to the mist spraying unit 100 by the valve 220 can be adjusted, and as a result, the mist spraying pressure can be adjusted by the valve 220. ..

The tank 300 is a container in which the liquid supplied to the mist spraying unit 100 is stored. In this embodiment, the tank 300 stores a chemical solution or water. Specifically, the tank 300 includes a container in which a chemical solution is stored and a container in which water is stored.

The temperature measuring unit 400 measures the dry-bulb temperature and the wet-bulb temperature in the house body 10. The dry-bulb temperature and wet-bulb temperature measured by the temperature measuring unit 400 are output to the control unit 500.

Specifically, the temperature measuring unit 400 includes a dry-bulb sensor 410, a wet-bulb sensor 420, and a temperature output unit 430. The dry-bulb sensor 410 measures the dry-bulb temperature of the air inside the house body 10. The wet-bulb sensor 420 measures the wet-bulb temperature of the air in the house body 10. The temperature output unit 430 outputs the dry-bulb temperature measured by the dry-bulb sensor 410 and the wet-bulb temperature measured by the wet-bulb sensor 420 to the control unit 500.

The wet-bulb sensor 420 is composed of a temperature detection unit 421, a fiber unit 422, and a water tank 423. The wet-bulb sensor 420 measures the wet-bulb temperature by sucking water through the fiber portion 422 immersed in the water tank 423 and keeping the temperature detection unit 421 in a wet state.

The temperature output unit 430 outputs the dry-bulb temperature and the wet-bulb temperature measured by the temperature measurement unit 400 to the control unit 500. Specifically, the temperature output unit 430 is wirelessly or wiredly connected to the control unit 500, and data on the dry-bulb temperature measured by the dry-bulb sensor 410 and the wet-bulb temperature measured by the wet-bulb sensor 420. Is output to the control unit 500. The measurement of the dry-bulb temperature by the dry-bulb sensor 410 and the measurement of the wet-bulb temperature by the wet-bulb sensor 420 are performed when the drug is sprayed, but the present invention is not limited to this, and may be performed at all times.

The dry-bulb temperature and wet-bulb temperature data measured by the dry-bulb sensor 410 and the wet-bulb sensor 420 may be stored in the memory. In this case, the dry-bulb temperature and wet-bulb temperature data may be stored in the memories built in the temperature measuring unit 400 and the control unit 500, or may be stored in other memories included in the agricultural house 1. May be good.

The control unit 500 controls the mist spray unit 100. Specifically, the control unit 500 calculates the saturation difference based on the dry-bulb temperature and the wet-bulb temperature measured by the temperature measurement unit 400, and based on this saturation difference, the mist spraying unit 100 sprays water mist. Controls the start and stop of. Further, the control unit 500 controls the start and stop of the spraying of the chemical liquid mist by the mist spraying unit 100. Specifically, the control unit 500 outputs a signal for starting or stopping the spraying of water mist or chemical mist by the mist spraying unit 100.

The control unit 500 is composed of, for example, a processor that operates according to a program, a computer provided with such a processor, or the like.

Next, the method of spraying the drug in the present embodiment will be described with reference to FIGS. 2 to 4 with reference to FIGS. 5 to 7. FIG. 5 is a flowchart of the drug spraying method according to the embodiment. FIG. 6 is a diagram for explaining a first step in the chemical spraying method according to the embodiment. FIG. 7 is a diagram for explaining a second step in the chemical spraying method according to the embodiment.

As shown in FIG. 5, in the chemical spraying method in the present embodiment, the first step S10 in which the inside of the chemical spraying region is filled with mist in advance, and after the first step S10, the chemicals are in a state of being filled with mist. Includes a second step S20 in which the drug is sprayed into the drug spraying area. That is, as a pretreatment before spraying the drug, a process is performed in which the inside of the drug spraying area is filled with mist.

The drug spraying area is an area where the drug is sprayed, and is a space in which the plant 2 to which the drug is attached is cultivated. In the present embodiment, the chemical spraying area is a space in the agricultural house 1. Specifically, the chemical spraying area is a space inside the house body 10 as shown in FIGS. 2 and 3.

Hereinafter, the details of the drug spraying method in the present embodiment will be described.

When the chemicals are sprayed in the agricultural house 1, the dry-bulb temperature and the wet-bulb temperature in the house body 10 are measured by the dry-bulb sensor 410 and the wet-bulb sensor 420. Dry-bulb temperature and wet-bulb temperature are continuously measured while the drug is being sprayed. In this case, the dry-bulb temperature and the wet-bulb temperature may be measured continuously at all times, or may be performed periodically every few seconds or every few minutes. The dry-bulb temperature and the wet-bulb temperature measured by the dry-bulb sensor 410 and the wet-bulb sensor 420 are output in real time from the temperature output unit 430 to the control unit 500.

The dry-bulb temperature measured by the dry-bulb sensor 410 and the wet-bulb temperature measured by the wet-bulb sensor 420 are output from the temperature output unit 430 to the control unit 500. The control unit 500 calculates the relative humidity and the saturation difference from the temperature difference between the dry-bulb temperature and the wet-bulb temperature. Relative humidity and saturation are calculated at any time according to the measurement of dry-bulb temperature and wet-bulb temperature.

Then, the control unit 500 outputs a signal (water mist spray start signal) to start spraying water mist until the saturation becomes 0 based on the calculated saturation, and after the saturation becomes 0. A signal to stop spraying water mist after a certain period of time (water mist spray stop signal) is output. As a result, as shown in FIG. 7, water is supplied to the mist spraying unit 100 through the pipe 200, and the water mist is sprayed from the mist spraying unit 100.

Specifically, when the water mist spray start signal is output from the control unit 500, the pump 210, the valve 220, and the like are controlled, and the water pressurized from the tank 300 to the pipe 200 is released from the tank 300 based on the mist spray start signal. Will be supplied. As an example, water having a water pressure of 0.1 to 0.8 MPa is supplied by a pump 210, a valve 220, or the like. As a result, for example, water mist having a particle size of 10 μm or more and 100 μm or less is sprayed from each mist spraying unit 100.

In this way, by spraying water mist having a particle size of 10 μm or more and 100 μm or less until the saturation becomes 0, as shown in FIG. 6, the inside of the house main body 10 which is the chemical solution spraying region is filled with mist. (First step S10).

After that, when a water mist spray stop signal is output from the control unit 500 after a certain period of time has elapsed since the saturation difference becomes 0, the pump 210, the valve 220, and the like pipe from the tank 300 based on the mist spray stop signal. Stop the water supply to 200. As a result, the spraying of water mist by the mist spraying unit 100 is stopped.

At this time, in the present embodiment, as described above, the spraying of the water mist is stopped after a certain period of time after the saturation difference becomes zero. In this case, by adjusting the time from when the saturation becomes 0 until the spraying of the water mist is stopped, it is possible to adjust the visibility in the state where the fog in the house main body 10 is filled. For example, the amount of water mist sprayed into the house body 10 can be increased by lengthening the time from when the saturation becomes 0 until the spraying of water mist is stopped. As a result, the visibility of the house body 10 in a fog-filled state can be reduced.

In the present embodiment, the visibility is preferably 10 m or less in the state where the fog is trapped. In this way, by setting the visibility in the house body 10 in a state of being filled with fog to 10 m or less, the surface of the plant 2 can be made wet in a few minutes. That is, if the visibility is 10 m or less for several minutes, fine water droplets adhere to the entire surface of the plant 2 in the house body 10 and become wet. For example, the entire front and back of the leaves of the plant 2 can be made wet.

Further, it is preferable that the visibility is 3 m or less when the fog is trapped. In this way, by setting the visibility in the house body 10 in a fog-filled state to 3 m or less, the surface of the plant 2 can be made wet in about 1 minute. That is, when the visibility is 3 m or less, fine water droplets adhere to the entire surface of the plant 2 in the house body 10 and the house can be made wet in about 1 minute.

Next, after the inside of the house body 10 is previously filled with mist in this way, the drug is sprayed into the house body 10 (drug spraying area) (second step S20).

For example, the control unit 500 outputs a signal for starting spraying of the chemical mist (chemical liquid mist spray start signal) at the same time as or immediately after outputting a signal for stopping the spraying of the water mist (water mist spray stop signal). As a result, as shown in FIG. 7, the chemical solution is supplied to the mist spraying section 100 through the pipe 200, and the chemical solution mist is sprayed from the mist spraying section 100 in a state where the mist is trapped in the house main body 10.

Specifically, when the chemical mist spray start signal is output from the control unit 500, the pump 210, the valve 220 and the like are controlled, and the chemical liquid pressurized from the tank 300 to the pipe 200 is released based on the mist spray start signal. Be supplied. As a result, the chemical mist is sprayed from each mist spraying unit 100, so that the chemical contained in the chemical mist can be sprayed on the entire plant 2 in the house body 10.

In this way, by spraying the chemical mist in the state where the mist is trapped in the house main body 10, the chemical mist containing the chemical can be retained in the air of the house main body 10 for a long time. For example, the chemical mist can be retained in the air of the house body 10 for several minutes. As a result, the drug can be distributed to every corner of each plant 2 in the house body 10, so that the probability that the drug adheres to the entire surface of the plant 2 can be increased. As a result, it is possible to increase the probability that the chemical is attached to the back of the leaf and the vicinity of the growth point of the overgrown plant 2, so that the amount of the chemical to be sprayed can be reduced. Further, even when the plant 2 is overgrown, the operator does not need to artificially spray the chemical locally, and the chemical is easily attached to the back of the leaf and the vicinity of the growth point of the plant 2. be able to.

As described above, according to the chemical spraying method according to the present embodiment, the first step S10 and the first step S10 in which the inside of the house main body 10 (inside the chemical spraying area), which is the space in the agricultural house, is preliminarily filled with mist. After the step S10, the second step S20 in which the drug is sprayed into the drug spraying area in a mist-filled state is included.

As a result, a sufficient drug effect can be obtained with as little drug amount as possible, and the drug can be easily adhered to the back of the leaf and the vicinity of the growth point of the overgrown plant. In addition, by reducing the amount of the drug used, it is possible to reduce the adverse effect on the human body due to the spraying of an excessive amount of the drug, and it is possible to reduce the burden on the environment.

Further, in the chemical spraying method of the present embodiment, in the first step S10, the mist is put in by a water mist having a particle size of 10 μm or more and 100 μm or less.

As a result, before the second step S20, the inside of the house main body 10 (inside the chemical spraying area) can be easily filled with mist.

In this case, in the first step S10, the spraying of water mist is adjusted by the saturation. Specifically, the dry-bulb temperature and the wet-bulb temperature in the house body 10 (in the chemical spraying area) are measured, and the saturation difference is calculated from the temperature difference between the dry-bulb temperature and the wet-bulb temperature. Water mist is sprayed until becomes 0.

By controlling the saturation and adjusting the spraying of water mist in this way, it is possible to easily bring the inside of the house body 10 into a state where fog is trapped.

Further, in the chemical spraying method in the present embodiment, in the second step S20, a chemical mist containing a chemical is sprayed. The drug is sprayed in the drug spray area. In this case, the particle size of the chemical mist is preferably 10 μm or more and 100 μm or less.

If the particle size of the chemical mist exceeds 100 μm, the chemical mist will fall in a short time and will not easily stay in the air, even if the chemical mist is sprayed in a mist state in advance, and the chemical will be attached to the plant 2. There is a risk that the probability of adhesion will be greatly reduced. On the other hand, when the particle size of the chemical solution mist is 10 μm or less, the chemical solution mist is likely to be clogged in the outlet 110 of the mist spraying unit 100 (nozzle), and it becomes necessary to frequently clean the mist spraying unit 100.

Therefore, by setting the particle size of the chemical solution mist to 10 μm or more and 100 μm or less, the chemical solution mist can be retained in the air in the house body 10 (drug spraying region) for a long time. As a result, the drug can be more efficiently attached to the back of the leaf and the vicinity of the growth point of the overgrown plant. As a result, the amount of the drug sprayed can be reduced.

(Modification example)
Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments.

For example, in the above embodiment, the agricultural house 1 is exemplified as the chemical spraying area for spraying the chemical, but the present invention is not limited to this. Further, the chemical spraying area does not necessarily have to be a closed space, but may be a closed space like the agricultural house 1. As a result, the drug can be efficiently attached to the object to which the drug is attached.

Further, in the present embodiment, the chemical mist and the water mist are sprayed using the same mist spraying unit 100, but the present invention is not limited to this. Specifically, the first mist spraying part for spraying the chemical mist and the second mist spraying part for spraying the water mist may be separated. In this case, the first pipe that supplies the chemical solution to the first mist spraying portion that sprays the chemical liquid mist and the second pipe that supplies water to the second mist spraying portion that sprays the water mist are separately piped. In this way, by spraying the chemical solution mist and the water mist using separate mist spraying portions (nozzles), the chemical solution mist can be sprayed only on the necessary place where the chemicals are to be sprayed. This makes it possible to locally spray the drug solution mist with a smaller amount of drug. Further, by separating the mist spraying part of the chemical mist and the water mist, it is possible to prevent the air outlet from being clogged by the chemical of the chemical mist. When spraying the chemical mist and the water mist in combination with one mist spraying unit as in the above embodiment, the mist spraying unit 100 is periodically used so that the chemical mist does not clog the air outlet. It is good to wash it.

Further, in the above embodiment, water mist is sprayed as a pretreatment before spraying the chemical mist, but the present invention is not limited to this, and water mist may be sprayed for air conditioning control. For example, when the temperature inside the house body 10 is controlled by spraying water mist, the temperature inside the house body 10 is set to a preset temperature (setting) based on the temperature measured by the temperature sensor installed inside the house body 10. The mist spraying unit 100 is controlled by the control unit 500 so as to have a temperature). Specifically, when the temperature inside the house main body 10 becomes higher than or is likely to become higher than the set temperature, the temperature inside the house main body 10 is caused by spraying water mist from the mist spraying unit 100 by the control unit 500. Can be lowered. Further, the time for spraying the water mist by the control unit 500 (spraying time) and the time for stopping the spraying of the water mist (spraying) so that the temperature inside the house body 10 changes according to the preset daily temperature schedule. The mist may be sprayed by determining the interval).

Further, in the above embodiment, the control unit 500 is installed in the house main body 10, but the present invention is not limited to this. For example, the control unit 500 may be installed in a place other than the house main body 10. In this case, the agricultural house 1 does not refer to the house main body 10 itself, but is constructed as an agricultural system including a control unit 500 installed in addition to the house main body 10. Further, the control unit 500 may be a server instead of a processor or the like.

Further, in the above embodiment, the soil cultivation in which the plant body 2 is planted in the soil has been described, but the present invention is also applied to the case where the plant body 2 is cultivated in an isolated floor in which a root-proof water-permeable sheet or the like is laid on the soil. You may.

In addition, a form obtained by subjecting various modifications to the above-described embodiment, or by arbitrarily combining the components and functions of the above-described embodiment without departing from the spirit of the present invention. The realized form is also included in the present invention.

Further, in the above description, the control unit 500 may be a circuit. These circuits may form one circuit as a whole, or may be separate circuits from each other. Further, each of these circuits may be a general-purpose circuit or a dedicated circuit.

Further, the processing described as the operation of the control unit 500 may be executed by the computer. For example, a computer executes each of the above processes by executing a program using hardware resources such as a processor (CPU), a memory, and an input / output circuit. Specifically, each process is executed by the processor acquiring the data to be processed from the memory or the input / output circuit or the like and calculating the data, or outputting the calculation result to the memory or the input / output circuit or the like. ..

Further, the program for executing each of the above processes may be recorded on a non-temporary recording medium such as a computer-readable CD-ROM. In this case, the computer executes each process by reading the program from the non-temporary recording medium and executing the program.

1 Agricultural house 500 control unit

Claims (6)

The first step to make the inside of the chemical spraying area filled with mist in advance,
A method for spraying a drug, which comprises a second step of spraying the drug into the drug spraying area in a mist-filled state after the first step. The chemical spraying method according to claim 1, wherein the chemical spraying area is a space in an agricultural greenhouse. The drug spraying method according to claim 1 or 2, wherein the visibility is 10 m or less when the mist is trapped. The drug spraying method according to claim 1 or 2, wherein the visibility is 3 m or less in the state where the mist is trapped. The method for spraying a chemical according to any one of claims 1 to 4, wherein in the first step, the mist having a particle size of 10 μm or more and 100 μm or less causes the mist to enter. The drug spraying method according to any one of claims 1 to 5, wherein in the first step, the spraying of mist is adjusted by saturation.

Images