JPWO2019123940A1 - Cultivation method of fruits and vegetables using an agricultural greenhouse - Google Patents

Abstract

The method of cultivating fruits and vegetables using the agricultural house (1) is whether or not the temperature difference between the temperature inside the agricultural house (1) and the temperature outside the agricultural house (1) is within a predetermined temperature difference. When it is determined in the determination step (S30) and the determination step (S30) that the temperature difference is within a predetermined temperature difference, a quick drop is performed by spraying mist into the agricultural house (1). It includes a mist spraying step (S40).

Description

The present invention relates to a method for cultivating fruits and vegetables using 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.

Conventionally, as a method of adjusting the temperature in an agricultural greenhouse, a technique of controlling the opening and closing of a ventilation window provided on a side wall or a ceiling is known (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-320983

When cultivating fruits and vegetables in an agricultural greenhouse, it is known to improve cultivation efficiency by performing quick drop. Quick drop is a technology that causes the temperature inside an agricultural greenhouse to drop sharply by opening the ventilation window in the evening and taking in cold air. By performing such a quick drop, the leaves are rapidly cooled until the fruit with a large amount of water is warm, so that the photosynthetic product can be moved from the leaf to the fruit to promote commutation.

However, in the hot summer months, the temperature difference between the temperature inside the temperature-controlled agricultural house and the temperature outside the agricultural house (outside temperature) is small, so even if the ventilation window is opened in the evening, the inside of the agricultural house There is a problem that the temperature of the plant cannot be rapidly dropped and the desired quick drop cannot be performed.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a method for cultivating fruits and vegetables using an agricultural house capable of performing a desired quick drop even in a hot summer season. And.

One aspect of the method for cultivating fruits and vegetables using the agricultural house according to the present invention is whether or not the temperature difference between the air temperature inside the agricultural house and the air temperature outside the agricultural house is within a predetermined temperature difference. The determination step of determining and the mist spraying step of performing a quick drop by spraying mist into the agricultural house when it is determined in the determination step that the temperature difference is within the predetermined temperature difference. Including.

Since the desired quick drop can be performed even in the hot summer season, the photosynthetic product can be transferred from the leaf to the fruit to promote commutation.

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 a method for cultivating fruits and vegetables using an agricultural greenhouse according to the embodiment. FIG. 6 is a schematic cross-sectional view schematically showing how mist is sprayed into the agricultural greenhouse 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)
The agricultural house 1 according to the embodiment will be described with reference to FIGS. 1 to 5. 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. In the present embodiment, the plant 2 is a fruit vegetable. Therefore, in the agricultural house 1, fruits are harvested by cultivating fruits and vegetables. Examples of fruit vegetables are tomatoes, cucumbers, eggplants 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 first temperature sensor 410, a second temperature sensor 420, and a control unit 500. .. The mist spraying unit 100, the pipe 200, the tank 300, the first temperature sensor 410, the second temperature sensor 420, 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. Generally, the mist includes a one-fluid mist and a two-fluid mist, but in the present embodiment, the one-fluid mist is sprayed from the mist spraying unit 100. Therefore, the particle size of the mist sprayed from the mist spraying unit 100 is, for example, 50 μm or more and 150 μm or less. Further, the spray pressure of the mist sprayed from the mist spray unit 100 is preferably 0.1 MPa or more and 0.8 MPa or less.

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 water is supplied to each mist spraying unit 100 through the pipe 200. The plurality of mist spraying units 100 atomize the water supplied through the pipe 200 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. The mist generated at a position higher than the plant 2 falls due to gravity, part of it vaporizes before reaching the plant 2, and the other part reaches the plant 2 and comes into contact with the object.

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.

The particle size of the mist sprayed from the mist spraying unit 100 has, for example, a mode of 10 μm to 100 μm. The mode of the particle size of the mist does not have to be in this range, but when the mode of the particle size is in this range, the mist sprayed from the mist spraying unit 100 does not float for a long time and is compared. It will fall in a short time. Therefore, not all of the mist floats and evaporates in the air, but a part of the mist reaches the plant 2 or the ground (the upper surface of the ridge 3 or the passage 4).

In the mist spraying unit 100 configured in this way, the temperature of the plant 2 can be adjusted by spraying the mist with the mist spraying unit 100. Specifically, when the mist sprayed from the mist spraying unit 100 adheres to the plant body 2, the heat of vaporization is taken from the plant body 2 when the mist evaporates from the plant body 2. As a result, the plant 2 is directly cooled. That is, the community of the plant 2 is cooled. In this way, the mist spraying unit 100 functions as a mist cooling device that cools the plant 2 by the mist.

Further, the temperature and humidity in the house main body 10 can be adjusted by spraying the mist with the mist spraying unit 100. Specifically, when the mist sprayed from the nozzle is vaporized by the heat of vaporization and heat is taken from the surrounding air, cold air is generated. As a result, the temperature inside the house body 10 drops. In addition, by generating mist, the humidity inside the house body 10 also rises. By spraying the mist with the mist spraying unit 100 in this way, the temperature inside the house main body 10 can be lowered or the humidity can be raised. That is, the mist spraying unit 100 also functions as a mist air conditioner that adjusts the temperature and humidity of the air in the house body 10 by the mist.

However, if the surface of the plant 2 gets wet and the humidity inside the house body 10 rises, the transpiration of the plant 2 may be suppressed. In addition, if the amount of mist in contact with the plant 2 is excessive or the humidity inside the house 10 is excessive, the possibility of disease or physiological disorder (fruit peeling, etc.) in the plant 2 increases. .. Therefore, it is preferable to generate mist intermittently so that the mist in contact with the plant 2 evaporates in a short time. That is, it is preferable to adjust the time for spraying the mist (spraying time) and the time for stopping the spraying of the mist (spraying interval).

In the present embodiment, watering for growing the plant 2 is performed by a watering device different from the mist spraying unit 100.

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, since water is supplied to the mist spraying unit 100, the pipe 200 is a water pipe through which water passes. 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, but is not limited to this, and water containing a chemical useful for the plant 2. It may be (chemical solution). In the following, the water supplied to the mist spraying unit 100 will be referred to as water regardless of whether or not it contains a chemical.

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 a flow path for supplying water 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 booster pump, and applies water pressure to the liquid (water in the present embodiment) stored in the tank 300 to supply it to the pipe 200. That is, the pump 210 pressurizes the water in the tank 300 and supplies it to the pipe 200. As a result, pressurized water is supplied to the pipe 200. Then, when pressurized water 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 water 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 water supplied from the tank 300 to the mist spraying unit 100. Specifically, the flow rate of water supplied to the mist spraying unit 100 can be adjusted by adjusting the opening degree of the valve 220. By adjusting the pressure of water by the pump 210 instead of adjusting the opening degree of the valve 220, the flow rate of water supplied to the mist spraying unit 100 can be adjusted as a result.

Further, by adjusting the pressure of water by the pump 210 instead of adjusting the opening degree of the valve 220, the flow rate of water 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 water 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 the present embodiment, since water is stored in the tank 300, the tank 300 is a water tank. The tank 300 may be composed of a plurality of containers. In this case, liquids other than water, such as chemicals, may be stored in the plurality of containers.

The first temperature sensor 410 is, for example, a thermometer, and measures the temperature inside the agricultural house 1. Specifically, the first temperature sensor 410 is installed in the house main body 10 and measures the temperature (air temperature) of the air in the house main body 10.

The second temperature sensor 420 is, for example, a thermometer and measures the temperature outside the agricultural house 1. Specifically, the second temperature sensor 420 is installed outside the house body 10 and measures the temperature (air temperature) of the air outside the house body 10. That is, the second temperature sensor 420 measures the temperature of the outside air (outside air temperature).

The first temperature sensor 410 and the second temperature sensor 420 are connected to the control unit 500 wirelessly or by wire, respectively, and the temperature data measured by the first temperature sensor 410 and the second temperature sensor 420 is the control unit 500. Is output to. In the present embodiment, the temperature inside and outside the house body 10 is measured at any time by the first temperature sensor 410 and the second temperature sensor 420, so that the control unit 500 outputs the data of the temperature inside and outside the house body 10 at any time. Will be done. That is, the temperature inside and outside the house body 10 is monitored by the first temperature sensor 410 and the second temperature sensor 420.

The temperature (air temperature) measured by the first temperature sensor 410 and the second temperature sensor 420 may be continuously measured at all times, or may be periodically performed every few seconds or every few minutes. The temperature measured by the first temperature sensor 410 and the second temperature sensor 420 is output in real time from the first temperature sensor 410 and the second temperature sensor 420 to the control unit 500.

The temperature data measured by the first temperature sensor 410 and the second temperature sensor 420 is stored in the memory. In this case, the temperature data may be stored in the memory built in the first temperature sensor 410 and the second temperature sensor 420 or the memory built in the control unit 500, or may be stored in the other memory provided in the agricultural house 1. It may be stored in the memory.

The control unit 500 controls the mist spray unit 100. In the present embodiment, the control unit 500 sprays the mist 100 based on the temperatures measured by the first temperature sensor 410 and the second temperature sensor 420 in order to perform a quick drop on the plant 2 by spraying the mist. Control.

Specifically, when performing a quick drop by spraying mist, first, the control unit 500 first determines the air temperature inside the house body 10 measured by the first temperature sensor 410 and outside the house body 10 measured by the second temperature sensor 420. It is determined whether or not the temperature difference between the temperature inside the house body 10 and the temperature outside the house body 10 is within a predetermined temperature difference. The predetermined temperature difference is, for example, 2 ° C.

Then, when the control unit 500 determines that the temperature difference between the air temperature inside the house main body 10 and the air temperature outside the house main body 10 is within a predetermined temperature difference (within 2 ° C. in the present embodiment), mist spraying is performed. Outputs a mist spray start signal to start. In this case, the control unit 500 outputs the mist spraying time signal regarding the mist spraying time (spraying time) as well as the mist spraying start signal. As a result, the mist spraying unit 100 sprays the mist into the house body 10 for a certain period of time. The mist spraying time for quick drop is, for example, 10 seconds or less. That is, the continuous spraying time for each spraying of mist is within 10 seconds.

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 cultivating fruits and vegetables using the agricultural house 1 in the present embodiment will be described with reference to FIGS. 2 to 4 with reference to FIGS. 5 and 6. FIG. 5 is a flowchart of a method for cultivating fruits and vegetables using the agricultural house 1 according to the embodiment. Specifically, FIG. 5 shows a flow when performing a quick drop using the agricultural house 1. FIG. 6 shows how mist is sprayed into the agricultural house 1 when the quick drop is performed.

The quick drop by mist spraying is performed during the time period from 15:00 to 20:00 when the photosynthesis of the plant 2 ends. In the present embodiment, the quick drop by mist spraying is performed during the sunset time.

Therefore, when performing a quick drop, first, as shown in FIG. 5, it is determined whether or not the current time is in the time zone of sunset (determination step S10). Specifically, the control unit 500 determines whether or not the current time is the time zone of sunset by a timer or the like built in the control unit 500.

As a result, unless the current time is in the sunset time zone (No in FIG. 5), quick drop by mist spraying is not performed. On the other hand, if the current time is the sunset time zone (Yes in FIG. 5), a quick drop by mist spraying is performed.

Further, in the present embodiment, the quick drop by mist spraying is performed when the temperature (outside air temperature) outside the agricultural house 1 is high as in the summer season. Specifically, the quick drop by spraying mist is performed when the temperature outside the agricultural house 1 (house body 10) is 30 ° C. or higher.

Therefore, when it is determined in the determination step S10 that the current time is the time zone of sunset, then, as shown in FIG. 5, whether or not the temperature outside the agricultural house 1 is 30 ° C. or higher. (Judgment step S20). Specifically, the control unit 500 determines whether or not the temperature outside the house body 10 measured by the second temperature sensor 420 is 30 ° C. or higher.

As a result, if the temperature outside the agricultural house 1 is less than 30 ° C. (No in S20), quick drop by mist spraying is not performed. In this case, the quick drop by the outside air is performed instead of the quick drop by the mist spray (S50). That is, by controlling the window 15, the temperature inside the house main body 10 is rapidly lowered by taking in the outside air (cold air) from the vent 13. On the other hand, if the temperature outside the agricultural house 1 is 30 ° C. or higher (Yes in S20), a quick drop by mist spraying is performed.

As described above, in the present embodiment, when the current time is the time zone of sunset and the temperature outside the agricultural house 1 is high (for example, the outside temperature is 30 ° C. or higher), the flow is as follows. Quick drop by mist spraying is performed.

In this case, first, it is determined whether or not the temperature difference between the air temperature inside the agricultural house 1 and the air temperature outside the agricultural house 1 is within a predetermined temperature difference (determination step S30). Specifically, the control unit 500 calculates the temperature difference between the air temperature inside the house body 10 measured by the first temperature sensor 410 and the air temperature outside the house body 10 measured by the second temperature sensor 420. It is determined whether or not the temperature difference is within a predetermined temperature difference. In the present embodiment, the predetermined temperature difference is 2 ° C. That is, the control unit 500 determines whether or not the temperature difference between the air temperature inside the house body 10 and the air temperature outside the house body 10 is within 2 ° C.

Then, when it is determined in the determination step S30 that the temperature difference is within a predetermined temperature difference, a quick drop is performed by spraying the mist into the agricultural house 1 (mist spraying step S40). Specifically, when the temperature difference between the air temperature inside the house body 10 and the air temperature outside the house body 10 is within 2 ° C., the control unit 500 outputs a mist spray start signal for starting mist spraying.

When the mist spray start signal is output from the control unit 500, the pump 210, the valve 220, and the like are controlled, and pressurized water is supplied from the tank 300 to the pipe 200 based on the mist spray start signal. For example, water having a water pressure of 0.1 MPa to 0.8 MPa is supplied to the pipe 200 by a pump 210, a valve 220, or the like.

As a result, mist is sprayed from each mist spraying unit 100. That is, the water supplied to the mist spraying unit 100 through the pipe 200 is ejected as mist from each mist spraying unit 100. In this case, the continuous spraying time for each spraying of mist is preferably 10 seconds or less.

By spraying the mist from the mist spraying unit 100 in this way, the mist adheres to the leaves of the plant 2. As a result, the leaves of the plant 2 are directly cooled by the heat of vaporization when the mist evaporates from the leaves of the plant 2. As a result, only the temperature of the leaves of the plant 2 can be sharply lowered without lowering the temperature of the fruits of the plant 2 so much, so that the temperature difference between the leaves of the plant 2 and the fruits can be obtained in a short time. it can. Therefore, it is possible to effectively promote translocation of photosynthetic products (sugar and the like) from leaves to fruits.

As described above, the quick drop by mist spraying in the present embodiment is different from the quick drop in which the plant 2 is cooled by the outside air (cold air) taken in from the ventilation window, and the leaves of the plant 2 are directly wetted and cooled by the mist. Therefore, it is possible to effectively promote commutation.

As described above, in the method for cultivating fruits and vegetables using the agricultural house 1 in the present embodiment, whether or not the temperature difference between the temperature inside the agricultural house 1 and the temperature outside the agricultural house 1 is within a predetermined temperature difference. When it is determined in the determination step S30 and the determination step S30 that the temperature difference is within a predetermined temperature difference, the mist spraying step S40 which performs a quick drop by spraying the mist into the agricultural house 1 ,including.

As a result, the temperature difference between the inside and outside of the temperature-controlled agricultural house 1 is small, such as during the hot summer months, and even if the outside air is taken into the agricultural house 1, the desired quick drop cannot be performed. Even if it is the time, the leaves of the plant 2 are cooled by spraying the mist on the plant 2 and adhering the mist to the leaves of the plant 2. As a result, the fruits of the plant 2 are warm and the leaves are rapidly cooled, so that a temperature difference between the leaves of the plant 2 and the fruits can be obtained. Therefore, it is possible to effectively promote commutation by moving photosynthetic products (sugar, etc.) from leaves to fruits.

As described above, according to the method for cultivating fruits and vegetables using the agricultural house 1 in the present embodiment, the desired quick drop can be performed even in the hot summer season.

Further, in the present embodiment, the predetermined temperature difference serving as the determination standard in the determination step S30 is 2 ° C. That is, in the determination step S30, when it is determined that the temperature difference between the inside and outside of the agricultural house 1 (house body 10) is within 2 ° C., a quick drop by mist spraying is performed.

As described above, when the temperature difference between the inside and outside of the agricultural house 1 (house body 10) is within 2 ° C., mist spraying enables more appropriate quick drop.

Further, in the present embodiment, the particle size of the mist in the mist spraying step S40 is preferably 1 μm or more and 100 μm or less.

As described above, by using the mist of fine particles having a particle diameter of 1 μm or more and 100 μm or less, the sprayed mist is easily evaporated. As a result, the plant 2 can be cooled more efficiently by the heat of vaporization when the mist adhering to the plant 2 evaporates, so that the effect of promoting the commutation of the plant 2 by the quick drop can be improved. .. Moreover, since the mist is easily evaporated, it is possible to prevent the plant 2 from being wet for a long time, so that the fruit of the plant 2 is wet for a long time, causing problems such as cracking of the fruit. It can reduce the risk of getting sick and the fruits.

Further, in the present embodiment, in the mist spraying step S40, it is preferable that the continuous spraying time for each spraying of mist is within 10 seconds.

As described above, by setting the continuous spraying time for each spraying of mist to a short time of 10 seconds or less, it is possible to prevent the fruits of the plant 2 from getting wet for a long time. As a result, the risk of cracking or getting sick due to the fruit being wet for a long time can be further reduced.

Further, in the present embodiment, the mist spraying step S40 may be performed between 15:00 and 20:00.

If the mist is sprayed after 15:00, it takes longer to evaporate the mist than when the mist is sprayed before 15:00 (for example, around 12:00), so that the wet state of the plant 2 continues for a long time. This may cause problems such as cracking in the fruits of the plant 2. Therefore, when spraying mist for the purpose of air conditioning control, the mist is not normally sprayed after 15:00, but in the present embodiment, the mist is sprayed in a short time of 10 seconds or less. Therefore, it is possible to suppress the adverse effect on the fruit due to the continuous wet state of the plant 2. That is, even when the mist is sprayed between 15:00 and 20:00 as in the present embodiment, the fruit of the plant 2 is cracked or the like by spraying the mist in a short time. It is possible to effectively promote the commutation of the plant 2 without doing so.

Further, the mist spraying step S40 may be controlled by the amount of solar radiation. For example, the mist spraying step S40 is performed when the amount of solar radiation is reduced to a predetermined value. Specifically, the amount of solar radiation is measured by a pyranometer, and when the amount of solar radiation decreases to a predetermined value, it is determined that it is sunset, and the mist spraying step S40 (quick drop by mist) is performed. In this way, by measuring the amount of solar radiation, it is possible to estimate the change in sunset time depending on the season, so it is possible to determine the appropriate timing for quick drop by mist within the time zone from 15:00 to 20:00. It can be determined accurately. The value of the amount of solar radiation to be determined to be sunset is, for example, 1000 lx. That is, when the amount of solar radiation measured by the pyranometer is reduced to 1000 lx, it is determined to be sunset. Further, the pyranometer may be installed inside or outside the house main body 10, but since various facilities and the like are present inside the house main body 10 and are likely to be shadowed, the pyranometer is a house. It is preferable to install it outside the main body 10.

Further, in the present embodiment, the mist spraying step S40 may be performed when the temperature outside the agricultural house 1 is 30 ° C. or higher.

When the temperature outside the agricultural house 1 is 30 ° C or higher, the effect of promoting commutation cannot be expected so much by the quick drop by taking in the outside air, but the quick drop by mist spraying is as in the present embodiment. Even when the temperature outside the agricultural house 1 is 30 ° C. or higher, the desired commutation promoting effect by the quick drop can be obtained. The quick drop by mist spraying in the present embodiment may be performed even when the temperature outside the agricultural house 1 is less than 30 ° C.

(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 mist spraying step S40 is performed after sunset, but is not limited to this. For example, if there is sunlight in the morning and photosynthetic products are produced, and the sun becomes cloudy in the early afternoon and the production of photosynthetic products (photosynthetic amount) decreases, it is before sunset. Even (or before 15:00), mist may be sprayed and a quick drop may be performed. In this case, for example, the amount of solar radiation is measured by a pyranometer as described above, and when the amount of solar radiation is reduced to a predetermined value, it is determined that the plant 2 has stopped photosynthesis, and the mist spraying step S40 ( Perform a quick drop with mist).

Further, in the above embodiment, the mist is sprayed when the quick drop is performed, but the present invention is not limited to this, and the mist may be sprayed when the air conditioning control is performed. For example, when the temperature inside the house body 10 is controlled by spraying mist, the temperature inside the house body 10 is set in advance based on the temperature measured by the first temperature sensor 410 installed inside the house body 10. The mist spraying unit 100 is controlled by the control unit 500 so as to reach (set 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 adjusted by spraying mist from the mist spraying unit 100 by the control unit 500. Can be lowered. Further, the time for spraying the mist by the control unit 500 (spraying time) and the time for stopping the spraying of the mist (spraying interval) so that the temperature inside the house body 10 changes according to a preset daily temperature schedule. And may be determined and the mist spraying portion may be performed.

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. 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

Claims (7)

A determination process for determining whether or not the temperature difference between the temperature inside the agricultural greenhouse and the temperature outside the agricultural greenhouse is within a predetermined temperature difference, and
When it is determined in the determination step that the temperature difference is within the predetermined temperature difference, the mist spraying step of performing a quick drop by spraying mist into the agricultural greenhouse is included.
Cultivation method of fruits and vegetables using an agricultural greenhouse. The method for cultivating fruits and vegetables using the agricultural greenhouse according to claim 1, wherein the predetermined temperature difference is 2 ° C. The method for cultivating fruits and vegetables using an agricultural greenhouse according to claim 1 or 2, wherein the particle size of the mist is 1 μm or more and 100 μm or less. The fruit and vegetable using the agricultural house according to any one of claims 1 to 3, wherein the mist spraying step has a continuous spraying time of 10 seconds or less per spraying of the mist. Cultivation method. The method for cultivating fruits and vegetables using the agricultural house according to any one of claims 1 to 4, wherein the mist spraying step is carried out between 15:00 and 20:00. The method for cultivating fruits and vegetables using the agricultural house according to any one of claims 1 to 5, wherein the mist spraying step is performed when the temperature outside the agricultural house is 30 ° C. or higher. .. The method for cultivating fruits and vegetables using an agricultural house according to any one of claims 1 to 4, wherein the mist spraying step is performed when the amount of solar radiation is reduced to a predetermined value.

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