WO2017130261A1

WO2017130261A1 - Mist generation system and agricultural greenhouse

Info

Publication number: WO2017130261A1
Application number: PCT/JP2016/005227
Authority: WO
Inventors: 田尾本　昭; 石渡　正紀
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2016-01-29
Filing date: 2016-12-27
Publication date: 2017-08-03
Also published as: JP6857853B2; JPWO2017130261A1

Abstract

This mist generation system (10) restricts a spatial region in which a mist is sprayed to a desired region. The mist generation system (10) is provided with a plurality of nozzles (11), a mounting member, and an adjuster. Each of the nozzles (11) receives a supply of liquid and sprays mist from a spray opening. The adjuster adjusts the flow rate of the liquid supplied to each of the plurality of nozzles (11) and/or the spray pressure of each of the plurality of nozzles (11). The mounting member attaches the plurality of nozzles (11) at predetermined positions. The predetermined positions are determined such that mists sprayed from two or more nozzles (11) selected from the plurality of nozzles (11) are combined and horizontal velocity components in a direction in which the at least two nozzles (11) spray the mists, among velocity components of the mists, are reduced.

Description

Mist generation system, agricultural house

The present invention relates to a mist generating system for ejecting mist and an agricultural house equipped with the mist generating system.

Conventionally, a house with a roof provided with a plurality of spray nozzles that generate mist in the upper high-temperature part in the house and a plurality of ventilation fans that discharge the mist from the spray nozzles has been proposed (for example, Patent Document 1). reference). In Patent Document 1, the mist is discharged by adjusting the operation of discharging the mist by the air flow generated by the ventilation fan and cooling the mist without dropping the mist, and the amount of spray from the spray nozzle and the amount of suction air from the ventilation fan. Operation is described.

The technique described in Patent Document 1 is configured to generate fog over the entire area on one plane in the house. That is, the house cooling device described in Patent Document 1 cools air or sprays fog over the entire area of the house where the plants are grown or the area where the animals are raised.

However, if the object to be cooled or sprayed with a drug is a plant, the plant is often planted in a basket formed in the field. Leads to wasteful consumption.

Japanese Patent Laid-Open No. 3-117433

It is an object of the present invention to provide a mist generating system capable of limiting a space area in which mist is sprayed to a target range, and to provide an agricultural house using the mist generating system. To do.

A mist generating system according to an aspect of the present invention includes a plurality of nozzles that eject mist, a regulator, and an attachment member that attaches each of the plurality of nozzles to a fixed position. The plurality of nozzles are supplied with a liquid and eject the mist from a spray port. The adjuster adjusts at least one of a flow rate of liquid supplied to each of the plurality of nozzles and a spray pressure of each of the plurality of nozzles. The attachment member attaches each of the plurality of nozzles such that the mist ejected by two or more nozzles selected from the plurality of nozzles is mixed. The mounting member attaches the plurality of nozzles so as to reduce a horizontal speed component in a direction in which at least the two or more nozzles eject the mist among the speed components of the mist.

The agricultural house which concerns on 1 aspect of this invention is equipped with the above-mentioned mist generating system and the outer shell which surrounds the space which grows a plant, At least these nozzles and the said attachment of the said mist generating system in the said space The structure with which the member is arrange | positioned is provided.

According to the configuration of the present invention, there is an advantage that it is possible to limit the space area in which the mist is sprayed to a target range.

It is a general | schematic horizontal sectional view which shows the agricultural house provided with the mist generating system which concerns on embodiment. It is a schematic cross section showing an agricultural house provided with a mist generating system concerning an embodiment. It is a schematic horizontal sectional view which shows another form of an agricultural house provided with the mist generating system which concerns on embodiment. It is a perspective view which shows an example of the nozzle which comprises the mist generating system which concerns on embodiment. It is a schematic plan view which shows the example of arrangement | positioning of the nozzle which comprises the mist generating system which concerns on embodiment. It is a perspective view showing an example of composition of an agricultural house to which a mist generating system concerning an embodiment is applied.

The mist generation system described below is configured for use in agricultural houses. However, it is possible to use the mist generation system described below other than the agricultural house. For example, the mist generation system described below can be applied to a building such as a resting place that uses mist to lower the temperature of human sensation and a beauty clinic (so-called beauty salon) that uses mist for treatment. Below, after demonstrating the structure of a mist generating system, the agricultural house using this mist generating system is demonstrated.

The mist generating system cools the object by lowering the temperature of the air by vaporizing the ejected mist, bringing the ejected mist into contact with the object, and removing the heat of vaporization from the object. Therefore, the mist generating system is arranged so as to generate mist above the object. The mist generated above the object falls due to gravity, and part of the mist is vaporized before reaching the object, and the other part reaches the object and comes into contact with the object. The object here is a plant grown in an agricultural house.

As shown in FIG. 1, the mist generating system 10 of the present embodiment includes a plurality of nozzles 11, a pump 12, a valve 13, a water pipe 14, and a tank 15. The water conduit 14 provides a flow path for supplying liquid from the tank 15 to the nozzle 11, and the pump 12 and the valve 13 are disposed in the flow path for supplying liquid from the tank 15 to the nozzle 11. That is, the pump 12 supplies the liquid stored in the tank 15 to the water pipe 14, and when the liquid is supplied to the nozzle 11 attached to the water pipe 14, mist is ejected from the nozzle 11. The valve 13 is disposed between the pump 12 and the water conduit 14.

As shown in FIG. 2, the nozzle 11 is disposed above the ridge 31 in which the plant 30 is planted in the agricultural house 20. However, the nozzle 11 may be disposed above a passage 32 formed between two adjacent ridges 31. When the nozzle 11 is disposed above the passage 32, the nozzle 11 is disposed at a height of, for example, about 200 [cm] from the ground so that the nozzle 11 does not interfere with an operator passing through the passage 32. The height shown here is an example, and is adjusted as needed. For example, when the ground portion is a plant having a low height and the nozzle 11 is disposed above the ridge 31, the height of the nozzle 11 from the ground may be set to about 100 [cm].

As described above, the plurality of nozzles 11 are provided in the middle portion of the water conduit 14. Each nozzle 11 has a structure in which the liquid is refined and ejected as mist. Each nozzle 11 includes a branch pipe 111, and a spray port 112 opens at the tip of the branch pipe 111 (see FIG. 4). The spray port 112 is formed in a cap 113 attached to the tip of the branch pipe 111 (see FIG. 4). In the configuration example shown in FIGS. 1 and 2, a nozzle 11 including two branch pipes 111 is used. That is, the two branch pipes 111 are extended in directions opposite to each other (directions different by 180 degrees), and the center line of the spray port 112 opens in the opposite direction on a straight line. The center line of the spray port 112 here means a center line along the axis of the branch pipe 111 in the extending direction.

The nozzle 11 is not limited to the configuration including the two branch pipes 111 but may be configured to include the four branch pipes 111 as shown in FIGS. 3 and 4. Only the branch pipe 111 of the book may be provided. In the nozzle 11 including the four branch pipes 111, the center lines of the four spray ports 112 are included in one plane. The four branch pipes 111 are provided at substantially equal angular intervals in a plane along the plane described above. That is, the four branch pipes 111 are disposed such that the axes of the branch pipes 111 in the extending direction form 90 degrees with each other.

When the liquid is supplied from the water pipe 14 to the nozzle 11, the nozzle 11 ejects mist from the spray port 112. The liquid is basically water, but may be an aqueous solution containing a component that is not clogged in the spray port 112 and useful for growing the plant 30. Hereinafter, the liquid supplied to the nozzle 11 is referred to as “water”. That is, in the following description, the term water includes not only pure water but also an aqueous solution containing a specific component.

The water pipe 14 is connected to the pump 12. The pump 12 supplies water stored in the tank 15 to the water pipe 14. When water pressurized by the pump 12 is supplied to the water conduit 14, mist is ejected from the nozzle 11. The mist ejected from the nozzle 11 falls by gravity as described above. Part of the mist evaporates during the fall, taking away the heat of vaporization and cooling the air. Moreover, the remaining part is spread | dispersed in the plant 30, and it takes heat of vaporization from the plant 30 at the time of evaporation, and lowers the temperature of the plant 30.

In the configuration example shown in FIG. 1, the water conduit 14 is branched into four systems. That is, the water pipe 14 is branched into four water pipes 142 through the header 141. The number of branches of the water pipe 14 varies depending on the scale of the agricultural house 20, but it is desirable to select a range of 2 branches or more and 6 branches or less, for example. With this number of branches, the variation in pressure supplied to the water pipe 14 falls within an allowable range. The water supply pipe 142 is disposed along the longitudinal direction of the flange 31. However, the water pipe 14 may be arranged in a direction intersecting with the eaves 31.

In the configuration example shown in FIG. 1, two water supply pipes 142 are arranged in one bottle 31, and one ends of the two water supply pipes 142 arranged in one bottle 31 are connected to the connecting pipe 143. That is, the two water supply pipes 142 arranged in one tub 31 are connected through the connection pipe 143. The connecting pipe 143 is connected to one end on the opposite side of the header 141 in the longitudinal direction of the water supply pipe 142.

With this configuration, compared to the case where one end of the water supply pipe 142 is opened without being connected to the connecting pipe 143, the pressure difference in the extension direction of one water supply pipe 142 is suppressed, and different water supply pipes 142 The pressure difference between them is suppressed. That is, it becomes possible to supply water to all the nozzles 11 arranged in the water conduit 14 at the same pressure.

Each nozzle 11 provided in each of the water supply pipes 142 includes two spray ports 112. The nozzle 11 is arranged so that the two spray ports 112 form 90 degrees with respect to the extending direction of the water supply pipe 142. Further, the nozzles 11 provided in the two water supply pipes 142 arranged in one tub 31 are arranged so that the spray ports 112 face each other. For example, the spray ports 112 of the two nozzles 11 in the direction perpendicular to the extending direction of the water supply pipe 142 are arranged to face each other.

The nozzle 11 is disposed so that the center lines of the two spray ports 112 are along the horizontal plane. Mist particles are ejected from one spraying port 112 in a substantially horizontal direction, and the mist particles ejected from the spraying port 112 fall by gravity while floating for a relatively long time by receiving buoyancy from air. In addition, the mist particles ejected from the spraying port 112 gradually lose the velocity in the horizontal direction due to the resistance of the air unless there is an airflow that causes external force to act and there is no obstacle to the movement. Fall into.

The specifications of the mist generating system 10 are determined so that mist ejected from two nozzles 11 arranged so as to face each other can be mixed and the mist particles can collide with each other without losing the horizontal velocity. It is done. Factors that determine the probability of collision of the mist particles ejected from the two nozzles 11 arranged to face each other include the distance between the spray ports 112, the initial velocity of the particles ejected from the spray ports 112, the distribution of particles, and the like. is there. The values of these factors are determined by the following specifications regarding the mist generation system 10. That is, the value of the factor includes the distance D1 between the two water pipes 142 corresponding to one ridge 31 and the pitch L1 of the nozzles 11 arranged in one water pipe 142. The value of the factor includes the direction of the center line of the spray port 112, the flow rate of water received by the nozzle 11, the size and shape of the spray port 112, the pressure of water supplied to the spray port 112, and the like.

When the mist particles ejected from the two nozzles 11 arranged so as to face each other collide with each other before losing the horizontal velocity, the horizontal velocity component in the mist particles decreases. When the velocity component in the horizontal direction decreases, the velocity component in the vertical downward direction becomes relatively large, so that mist diffusion is suppressed, and as a result, the mist reachable range is limited. When the plurality of nozzles 11 are arranged as described above, the space area where the mist exists is limited to a rectangular parallelepiped range surrounded by the two water supply pipes 142 and the single flange 31. That is, the spatial region where the mist is present is generally limited to the range indicated by the alternate long and short dash line in FIGS. That is, when the nozzles 11 are arranged at the appropriate pitch L1 in each of the two water supply pipes 142, the space area where the mist exists is limited to a rectangular parallelepiped range.

In addition, the mist ejected from the spray port 112 spreads away from the center line of the spray port 112 as the distance from the spray port 112 increases. Therefore, the particles away from the center line of the spray port 112 have a velocity component in a direction along the center line of the spray port 112 and a speed component in a direction orthogonal to the center line of the spray port 112 in a plane along the horizontal plane. have. When a mist particle having such a velocity component collides, the mist particle after the collision does not always fall, but the velocity component in the direction of the center line of the spray nozzle 112 is almost reduced. Therefore, the mist hardly spreads in the width direction of the flange 31. In other words, if the velocity component in the direction along the center line of the spraying port 112 is reduced, it becomes possible to drop most of the mist on the basket 31, and as a result, the mist can be cooled without waste. It becomes possible to use for.

As described above, one nozzle 11 includes two spray ports 112, and the center lines of the spray ports 112 are arranged at 90 degrees with respect to the extending direction of the water pipe 142. Therefore, the mist ejected from the two spray ports 112 provided in one nozzle 11 is limited to fall on the ridge 31, but the mist ejected from the remaining two spray ports 112 facing the passage 32 is Almost no guidance on the ridge 31. Therefore, it is desirable that the spray port 112 facing the passage 32 out of the two spray ports 112 provided in one nozzle 11 is closed so as not to eject mist. In order to close the spray port 112, for example, a plug may be attached to the spray port 112. In this way, if one of the two spray ports 112 provided in the nozzle 11 is closed, water consumption is suppressed.

When the reach of the mist is limited to the range desired by the user by the above-described operation, it is necessary to arrange the nozzle 11 at an appropriate position. Therefore, the mist generating system 10 includes an attachment member 16 that attaches the nozzle 11 to a fixed position with respect to the agricultural house 20 (see FIG. 2). The attachment member 16 is selected from, for example, a wire that suspends the water supply pipe 142 from the structural material of the agricultural house 20, a binding band that integrally binds the water supply pipe 142 to the structural material of the agricultural house 20, or a U-bolt. FIG. 2 shows a configuration example in which the attachment member 16 is a wire.

The mist ejected from the spray port 112 is distributed in a range according to the specifications of the nozzle 11. That is, the shape of the space area in which mist is distributed varies depending on the specifications of the nozzle 11. In many nozzles 11, a cross section obtained by cutting a spatial region in which mist is distributed along a plane orthogonal to the center line of the spray nozzle 112 is any one of a circle, an ellipse, a rectangle, and an annulus. As described above, when the center line of the spray port 112 is disposed along the horizontal plane, the mist ejected from the nozzle 11 falls due to gravity. The spray port 112 is disposed above the height position assumed to be the upper end when the plant 30 is grown.

When the mist is brought into contact with the plant 30 such as cooling of the plant 30 by vaporization of the mist or spraying of the drug on the plant 30 using the mist, the mist ejected from the spray port 112 falls and reaches the plant 30. Thus, the specifications of the mist generating system 10 are adjusted. When cooling the air around the plant 30 without bringing the mist into contact with the plant 30, the mist generating system is configured so that the mist ejected from the spraying port 112 falls and evaporates before reaching the plant 30. Ten specifications are adjusted.

For example, it is desirable that the horizontal distance reached by the mist ejected from the spray port 112 is 0.3 [m] or more and 2 [m] or less. In this case, it is desirable that the average particle diameter of the mist is 20 [μm] or more and 200 [μm] or less, and the maximum discharge pressure of the mist is 0.1 [MPa] or more and 0.8 [MPa] or less. The horizontal distance that the mist reaches is 0.6 [m] or more and 1.2 [m] or less, the average particle diameter of the mist is 50 [μm] or more and 80 [μm] or less, and the maximum discharge pressure of the mist is It is more desirable that it is 0.3 [MPa] or more and 0.6 [MPa] or less.

The horizontal distance reached by the mist means the distance until the mist particles ejected from the spray nozzle 112 lose the velocity component in the horizontal direction due to air resistance, etc. , Called the average initial speed). Here, for the horizontal distance reached by the mist, an average value of the horizontal distances reached by individual particles included in the mist is used. The maximum discharge pressure is the maximum value of the pressure of water introduced into the nozzle 11 (that is, the spray pressure), and is a factor that determines the average particle diameter and the average initial velocity in the horizontal direction. In other words, three factors are related: the horizontal distance reached by the mist, the average particle diameter of the mist, and the maximum discharge pressure. Therefore, it is necessary to select the nozzle 11 in order for each factor to achieve the numerical range described above. The three factors are determined according to the temperature inside the agricultural house 20, the height of the plant 30 to be grown, and the like.

For example, if the average particle diameter of the mist is large, the difference between gravity and buoyancy increases and the horizontal resistance is shortened by increasing the air resistance, but the time until the mist disappears becomes longer. On the other hand, the horizontal distance that the mist reaches increases as the maximum discharge pressure increases. Further, as the flow rate of water supplied to the nozzle 11 is increased, the concentration of mist ejected from the nozzle 11 is increased. The average particle diameter of the mist becomes smaller when either the maximum discharge pressure or the flow rate is increased.

It is desirable to increase the maximum discharge pressure as the temperature inside the agricultural house 20 increases. When the maximum discharge pressure is increased, the weight of water misted per unit time increases and the density of mist increases, so that the probability of collision of mist ejected from the two nozzles 11 facing each other increases. On the other hand, if the temperature inside the agricultural house 20 is relatively low, the mist does not evaporate and can easily reach the plant 30, so that the average temperature of the mist decreases as the temperature decreases so that excessive moisture does not adhere to the plant 30. It is necessary to reduce the particle size. The relationship between the average particle diameter of the mist, the maximum discharge pressure of the mist, etc. is an example, and is determined as appropriate according to demands such as the horizontal distance at which the mist reaches and the amount by which the mist is dropped.

When the above-described value is adopted, the interval D1 between the two water pipes 142 arranged on one basin 31 is in the range of 60 [cm] to 80 [cm], and the pitch of the nozzles 11 in the single water pipe 142 is set. It is desirable that L1 be smaller than the interval D1 between the water pipes 142.

Incidentally, as shown in FIGS. 3 and 4, the nozzle 11 may include four branch pipes 111. The nozzle 11 includes four spray ports 112. The four spray ports 112 are provided so that the center lines are spaced by 90 degrees in one plane. The nozzle 11 is arranged such that the plane including the four spray ports 112 is along the horizontal plane with respect to the water supply pipe 142, and the center line of each of the four spray ports 112 is approximately the extension direction of the water supply pipe 142. Arranged at 45 degrees. In addition, the nozzles 11 provided in the two water supply pipes 142 corresponding to one bottle 31 are arranged so that the spray ports 112 face each other. For example, the spray port 112 of the nozzle 11 (first nozzle) arranged in one of the two water supply pipes 142 and at least one nozzle arranged in the other water supply pipe 142 and closest to the first nozzle. 11 (second nozzle) nozzles 112 are arranged to face each other.

Suppose that the distance between the two water pipes 142 corresponding to one ridge 31 is D1, the pitch L2 at which the nozzles 11 are arranged in one water pipe 142 is defined as L2 = 2 · D1. In this example, the nozzles 11 provided in each of the two water supply pipes 142 are positioned so as to be shifted from each other by D1 (= L2 / 2) in the extending direction of the water supply pipe 142. For example, if L2 = 100 [cm] and D1 = 50 [cm], the above-described conditions are satisfied. This numerical value is appropriately selected according to the width of the flange 31, the specifications of the nozzle 11, and the like.

When the nozzle 11 having the four spray ports 112 is used, the mist has a velocity component in the longitudinal direction of the soot 31. Therefore, compared to the case of using the nozzle 11 having the two spray ports 112, the length in the longitudinal direction of the soot 31 is increased. Mist density unevenness is reduced. In other words, it is possible to spray mist over the entire basket 31 using a relatively small number of nozzles 11. When the nozzle 11 including the four spray ports 112 is arranged as described above, the range in which the mist is sprayed is approximately the range surrounded by the one-dot chain line in FIG. That is, the mist is dispersed in a rectangular space region.

The arrangement of the nozzles 11 described above is an example. For example, L2 = D1 may be sufficient as the pitch L2 which arrange | positions the nozzle 11 in the one water supply pipe 142. FIG. In this case, the nozzles 11 provided in the two water supply pipes 142 are arranged at the same position in the extending direction of the water supply pipes 142. If the nozzles 11 provided in each of the two water supply pipes 142 are arranged in this way, mists are ejected from the four spray ports 112 in the same space region. Therefore, compared with the configuration example shown in FIG. Increases density.

By the way, when one nozzle 11 is provided with four spray ports 112 and each spray port 112 is arranged so that the center line of the spray nozzles 112 is approximately 45 degrees with respect to the extending direction of the water supply pipe 142, the two spray ports 112 are provided. The range in which the mist ejected from the mist falls is restricted on the ridge 31. On the other hand, even if mist is ejected from the remaining two spray ports 112 facing the passage 32, the mist is not guided onto the tub 31. Therefore, it is desirable that the two spray ports 112 facing the passage 32 out of the four spray ports 112 provided in one nozzle 11 are closed so as not to eject mist. In order to close the spray port 112, for example, a plug may be attached to the spray port 112.

Even when the nozzle 11 having four spray ports 112 is employed as shown in FIG. 4, the horizontal distance that the mist reaches, the average particle diameter of the mist, and the maximum discharge pressure of the mist are different from those of the nozzle 11 having the two spray ports 112. It is the same as the case where it employs. That is, when the distance D1 between the two water supply pipes 142 corresponding to one ridge 31 is 50 [cm] and the pitch L1 of the nozzles 11 is 100 [cm], for example, mist ejected from the spray port 112 arrives. The horizontal distance is desirably 0.3 [m] or more and 2 [m] or less. In this case, it is desirable that the average particle diameter of the mist is 20 [μm] or more and 200 [μm] or less, and the maximum discharge pressure of the mist is 0.1 [MPa] or more and 0.8 [MPa] or less. The horizontal distance that the mist reaches is 0.6 [m] or more and 1.2 [m] or less, the average particle diameter of the mist is 50 [μm] or more and 80 [μm] or less, and the maximum discharge pressure of the mist is It is more desirable that it is 0.3 [MPa] or more and 0.6 [MPa] or less.

By the way, the nozzle 11 may include a regulator that adjusts at least one of the flow rate of water received from the water conduit 14 and the spray pressure of the mist discharged from the spray port 112. When adjusting the flow rate, for example, a needle valve arranged in the flow path from the water flow pipe 14 to the branch point 111 is used so as to adjust the flow rate of water supplied to the branch pipe 111. Moreover, when adjusting a spraying pressure, the cap 113 provided with the spraying port 112 is used, for example. In the cap 113 that adjusts the spray pressure, the thread groove formed on the inner surface meshes with the thread groove formed on the outer peripheral surface of the branch pipe 111. Therefore, when the cap 113 rotates with respect to the branch pipe 111, the cap 113 moves with respect to the branch pipe 111. When the cap 113 moves relative to the branch pipe 111, the distance between the tip of the branch pipe 111 and the spray port 112 changes. As a result, the pressure of water passing through the spray port 112 (that is, the spray pressure) can be adjusted.

The controller that adjusts at least one of the flow rate of water supplied to the nozzle 11 and the spray pressure may be at least one of the pump 12 and the valve 13. If the structure which controls the rotation speed of the pump 12 with an inverter is employ | adopted, the flow volume which passes the pump 12 can be adjusted and the flow volume of the water supplied to the nozzle 11 can be adjusted. Further, the flow rate of water supplied to the nozzle 11 can also be adjusted by adjusting the opening of the valve 13. If a pressure control valve whose adjustment range of the set pressure is a desired range is provided as the valve 13, the pressure of water supplied to the nozzle 11 is adjusted by the valve 13, and as a result, the spray pressure can be adjusted by the valve 13.

The adjuster can adjust at least one of the flow rate and the spray pressure manually. However, if a controller that indicates the flow rate or the spray pressure using an electrical signal is employed, it is possible to adjust at least one of the flow rate and the spray pressure according to the time schedule. The adjuster may adjust at least one of the flow rate and the spray pressure according to the internal environment, the external environment, etc. of the agricultural house 20 detected by the sensor.

As described above, if the mist generating system 10 includes a regulator, at least one of the flow rate of water supplied to the nozzle 11 by the regulator and the spray pressure of the mist ejected from the nozzle 11 can be adjusted. As a result, the average particle diameter of the mist ejected from the spray port 112 and the maximum discharge pressure of the mist can be adjusted, and the ejection speed of the mist ejected from the spray port 112 can be adjusted. Although depending on the configuration of the nozzle 11, there is usually a correlation between the average particle diameter of the mist and the ejection speed. Therefore, the adjuster may be configured such that only one of the adjustment of the flow rate of the water supplied to the nozzle 11 and the adjustment of the ejection pressure of the mist can be performed.

In the mist generating system 10 described above, the two nozzles 11 are arranged so as to face the spraying ports 112, but the range in which the mist is dropped also by mixing the mists ejected from the three or more nozzles 11 Can be limited. That is, the mist ejected from each of the three or more nozzles 11 is mixed, and the three or more nozzles are reduced so as to reduce the velocity component along the central axis of each of the nozzles 11 in the plane along the horizontal plane. If the nozzle 11 is arranged, the range of mist is limited.

FIG. 5 shows an arrangement example in the case of mixing the mist ejected from the three nozzles 11. In the example shown in FIG. 5, the spray ports 112 of the three nozzles 11 are located at the apexes of an equilateral triangle. Even in such an arrangement, when the mist is mixed, the velocity component along the central axis of the spray port 112 among the velocity components of the mist ejected from the three nozzles 11 is reduced, and the mist reachable range. Is limited.

A configuration example of the agricultural house 20 to which the above-described mist generation system 10 is applied will be briefly described below. The plant 30 cultivated in the agricultural house 20 can be selected from leaf vegetables, fruit vegetables, beans, fruits, flowers and the like. Leafy vegetables are represented by spinach, komatsuna, lettuce, cabbage, Chinese cabbage and the like. Fruit vegetables are represented by tomato, cucumber, eggplant and the like.

In the present embodiment, the mist is sprayed on the plant 30 by cooling the plant 30 by bringing the plant 30 into contact with low-temperature water, and by removing the heat of vaporization from the plant 30 and the surroundings of the plant 30. The main purpose is to lower the temperature. Further, by generating mist above the plant 30, it takes heat of vaporization from the air above the agricultural house 20 and contributes to lowering the temperature around the plant 30. Furthermore, the mist may be ejected from the nozzle 11 for the purpose of spraying the medicine as well as controlling the temperature by the heat of vaporization.

As shown in FIG. 6, the agricultural house 20 includes an outer shell 21 composed of a frame 211 configured by combining metal pipes as structural materials, and a covering body 212 supported by the frame 211. The frame 211 is formed in an inverted U shape integrally including two support columns 2111 arranged side by side and a connecting portion 2112 that connects one end of each of the two support columns 2111. Although the connection part 2112 has shown the example formed in the smooth arc shape, it may be formed in the reverse V shape which attached the end of each of two straight lines. The cover 212 may be glass, but in this configuration example, a synthetic resin film having translucency (desirably transparent) is used. The plurality of frames 211 are arranged in a direction intersecting with the surrounding surfaces, and the covering body 212 is installed on the plurality of frames 211 in a state where the plurality of frames 211 are arranged. The covering body 212 covers a virtual three-dimensional object formed by arranging a plurality of frames 211 along the entire circumference.

The agricultural house 20 includes a roof part 200 having a semicircular cross section, a pair of side wall parts 201 that support the roof part 200 and face each other, and a pair of end wall parts 203 that are orthogonal to the side wall part 201 and face each other. Prepare for. Therefore, the agricultural house 20 is formed in an inverted U shape in a cross section orthogonal to the direction connecting the end wall portions 203. The dimension in the direction connecting the pair of end wall parts 203 is designed to be sufficiently larger than the direction connecting the pair of side wall parts 201. Hereinafter, the direction connecting the pair of end wall portions 203 is referred to as a longitudinal direction, and the direction connecting the pair of side wall portions 201 is referred to as a short direction. The longitudinal direction of the eaves 31 is along the longitudinal direction of the agricultural house 20, and a plurality of eaves 31 are formed in the short direction of the agricultural house 20.

The agricultural house 20 includes a curtain 23 and a window 24. The curtain 23 is movable between a first position where external light incident on the interior is reduced and a second position where external light incident on the interior is not attenuated. Further, the window 24 is movable between an open position that allows ventilation between the inside and the outside and a closed position that does not allow ventilation between the inside and the outside.

Further, the agricultural house 20 includes, as the curtain 23, a roof curtain 230 disposed along the roof portion 200 and two side curtains 231 disposed along each of the two side wall portions 201. The roof curtain 230 adjusts the amount of incident external light from the roof portion 200 by moving between the first position and the second position. The side curtain 231 adjusts the amount of incident external light from each of the two side wall portions 201 by moving between the first position and the second position. The roof curtain 230 and the side curtain 231 are driven independently by a driving device. The driving device includes a power source such as a motor, and includes driving mechanisms respectively corresponding to the roof curtain 230 and the side curtain 231.

The window 24 is provided in each side wall part 201. The window 24 adjusts the ventilation resistance of air when ventilating between the inside and the outside of the agricultural house 20 by adjusting the opening degree. It is desirable that the agricultural house 20 includes a window on the end wall 203 in addition to the side wall 201. The windows 24 of the two side wall portions 201 are independently driven by a driving device. The driving device includes a power source such as a motor, and includes driving mechanisms corresponding to the windows 24.

If the position of the curtain 23 and the opening of the window 24 are appropriately adjusted, the internal temperature and internal humidity of the agricultural house 20 can be changed. For example, if the roof curtain 230 and the side curtain 231 are closed and the opening of the window 24 is increased during a sunny day in the summer, an increase in the internal temperature of the agricultural house 20 is suppressed.

In the house wall 203 of the agricultural house 20, a fan 25 is arranged at the upper part and an entrance is provided at the lower part. The fan 25 ventilates the agricultural house 20 by mechanical ventilation, and contributes to the adjustment of the internal temperature and internal humidity of the agricultural house 20. The fan 25 forms an air current in the agricultural house 20 during operation. As described above, by controlling the operation of the equipment such as the curtain 23, the window 24, and the fan 25, the internal environment of the agricultural house 20 is controlled and the environment for growing the plant 30 can be prepared.

The agricultural house 20 includes various devices such as a device for sprinkling water on the plant 30 in addition to the mist generating system 10, the curtain 23, the window 24, and the fan 25 in order to control the environment for growing the plant 30. The agricultural house 20 may be provided with a sensor for monitoring the internal environment of the agricultural house 20 selected from temperature, humidity, moisture content in soil, illuminance, and the like. The internal environment monitored by the sensor includes the temperature, humidity, and illuminance of the plant 30. Sensors for monitoring the internal environment are preferably provided at a plurality of locations in the agricultural house 20, but may be provided at only one location.

It is desirable that the device for preparing the internal environment of the agricultural house 20 determines the operating state based on the internal environment of the agricultural house 20 monitored by the sensor. In this case, the control device controls various devices such as the curtain 23, the window 24, the fan 25, the water spraying device, and the mist spraying device based on the internal environment of the agricultural house 20 monitored by the sensor. The relationship between the internal environment monitored by the sensor 61 and the operation of various devices is determined according to the type of the plant 30, the growth stage of the plant 30, the season, and the like.

The control device can be selected between manual operation and automatic operation. When automatic operation is selected, various devices are automatically operated. Further, the control device has a built-in timer, and the timer is configured such that an operation period and a stop period can be set as a schedule. When the automatic operation is selected, the control device controls the operation of various devices according to the internal environment monitored by the sensor during the operation period set in the timer.

The agricultural house 20 having the above-described configuration is an example, and is not intended to limit the configuration of the agricultural house 20, and does not prevent other materials from being used for the agricultural house 20 or formed into other shapes.

As described above, the mist generation system 10 according to the first aspect of the present invention includes the plurality of nozzles 11, the regulator, and the attachment member 16. Each of the nozzles 11 is supplied with a liquid and ejects mist from the spray port 112. The adjuster adjusts at least one of the flow rate of the liquid supplied to each of the plurality of nozzles 11 and the spray pressure of each of the plurality of nozzles 11. The attachment member 16 attaches each of the plurality of nozzles 11 to a fixed position. In this fixed position, the mist ejected by two or more nozzles 11 selected from the plurality of nozzles 11 is mixed, and at least two or more nozzles 11 out of the velocity components of the mist are directed to eject the mist. It is determined so as to reduce the velocity component in the horizontal direction.

According to this configuration, the mist ejected from the plurality of nozzles 11 is mixed, and the velocity component in the direction in which the mist is ejected from the nozzle 11 is reduced. Therefore, compared to the case where mist is not mixed, the mist is closer to the nozzle 11. Mist falls. In other words, it is possible to restrict the space area where mist is diffused and to spray mist in a specific space area with priority. As a result, while supplying the required amount of mist to the space area where mist is required, the mist is prevented from scattering into the space area where mist is not required, so the amount of water supplied to generate the mist is reduced. Increase is suppressed. That is, it contributes to water saving.

Since the mist generation system 10 adjusts at least one of the liquid flow rate and the liquid spray pressure, at least one of the average particle diameter of the mist ejected from the spray port 112, the horizontal distance reached by the mist, and the maximum discharge pressure of the mist. One element can be adjusted. Therefore, adjusting the regulator makes it possible to supply the required amount of mist.

Also, when the mist is used for drug spraying, the space area in which the mist is sprayed can be limited to the range of the straight object to be sprayed. Therefore, the amount of medicine used can be reduced.

In the mist generation system 10 of the second aspect, in the first aspect, the regulator is desirably at least one of a valve 13 and a pump 12 arranged in a flow path for supplying liquid to the plurality of nozzles 11. .

According to this configuration, the flow rate of the liquid supplied to the nozzle 11 can be adjusted by adjusting the opening degree of the valve 13 or the flow rate of the pump 12.

In the mist generating system 10 of the third aspect, in the first or second aspect, the attachment member 16 is arranged with two or more nozzles 11 so that the mist ejected from the two or more nozzles 11 collides. It is desirable that the direction in which two or more nozzles 11 eject mist is determined.

According to this configuration, since the position and orientation of the nozzle 11 are determined using the mounting member 16, it is possible to supply mist to the target space area.

In the mist generation system 10 of the fourth aspect, the two or more nozzles 11 are the two nozzles 11 in the third aspect. It is desirable that the two nozzles 11 are arranged so that the spray ports 112 face each other in a horizontal plane.

That is, since the spray ports 112 of the different nozzles 11 face each other, when the mist ejected from the spray ports 112 is mixed, the velocity component in the direction in which the spray ports 112 face each other is reduced. As a result, the mist easily falls in the region between the plurality of spray ports 112, and the mist diffusion is suppressed.

The agricultural house 20 of the fifth aspect includes any one of the first to fourth mist generating systems 10 and an outer shell 21 surrounding a space for growing plants, and at least one of the mist generating systems 10 in the space. A plurality of nozzles 11 and a mounting member 16 are arranged.

According to this configuration, since the nozzle 11 and the attachment member 16 are arranged in the internal space of the outer shell 21, the internal space of the agricultural house can be cooled by the mist ejected from the nozzle 11.

In the agricultural house 20 of the sixth aspect, in the fifth aspect, the horizontal distance reached by the mist ejected from the spray port 112 is 0.3 [m] or more and 2 [m] or less, and the average particle diameter of the mist is 20 [Μm] or more and 200 [μm] or less, and the maximum discharge pressure of mist is preferably 0.1 [MPa] or more and 0.8 [MPa] or less. Further, in the agricultural house 20 of the seventh aspect, in the sixth aspect, the horizontal distance reached by the mist ejected from the spray nozzle 112 is 0.6 [m] or more and 1.2 [m] or less, and the average of the mist More preferably, the particle size is 50 [μm] or more and 80 [μm] or less, and the maximum discharge pressure of mist is 0.3 [MPa] or more and 0.6 [MPa] or less.

When the above numerical range is adopted, the mist ejected from the plurality of nozzles 11 is mixed, so that it is possible to drop the mist to the vicinity of the plant 30 to be grown, and as a result, the heat of vaporization is taken away and the plant 30 is cooled. It becomes possible to do. If a dry mist having an average particle size smaller than 20 [μm] is adopted, water droplets do not adhere to the plant 30, but the amount of liquid atomized as mist is small, and the interior space of the agricultural house 20 is wide. It is difficult to cool the space area. On the other hand, by adopting the numerical range described above, it is possible to supply a relatively large amount of mist to the internal space of the agricultural house 20, so that the effect of cooling the agricultural house 20 is enhanced. .

In the agricultural house 20 according to the eighth aspect, in any one of the fifth to seventh aspects, the outer shell 21 preferably includes a plurality of frames 211 and a covering 212. Each of the frames 211 has an inverted U shape and is a structural material. The covering body 212 is installed on the plurality of frames 211 in a state where the plurality of frames 211 are arranged in a direction intersecting with a surface surrounded by each of the plurality of frames 211. The covering 212 covers a solid object virtually defined by the plurality of frames 211 over the entire circumference.

This agricultural house 20 has a general structure, and by providing the mist generating system 10, it becomes possible to efficiently supply mist to the plant 30 to be grown.

The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made according to design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it can be changed.

10 Mist generation system 11 Nozzle 12 Pump (regulator)
13 Valve (regulator)
16 Mounting member 20 Agricultural house 21 Outer shell 30 Plant 112 Spraying port 211 Frame 212 Covering body

Claims

A plurality of nozzles for receiving mist and ejecting mist from the spray port;
A regulator for adjusting at least one of a flow rate of liquid supplied to each of the plurality of nozzles and a spray pressure of each of the plurality of nozzles;
The mist ejected by two or more nozzles selected from the plurality of nozzles is mixed, and among the velocity components of the mist, at least the two or more nozzles in the horizontal direction of ejecting the mist. A mist generation system comprising: an attachment member that attaches each of the plurality of nozzles to a fixed position so as to reduce a velocity component.
The mist generating system according to claim 1, wherein the regulator is at least one of a valve and a pump arranged in a flow path for supplying liquid to the plurality of nozzles.
The mounting member is
The arrangement of the two or more nozzles and the direction in which the two or more nozzles eject the mist are determined so that the mist ejected from the two or more nozzles collides. The described mist generating system.
The two or more nozzles are two nozzles;
The mist generating system according to claim 3, wherein the two nozzles are arranged so that the spray ports face each other in a horizontal plane.
The mist generating system according to any one of claims 1 to 4,
With an outer shell that encloses a space for growing plants,
An agricultural house, wherein at least the plurality of nozzles and the attachment member of the mist generation system are arranged in the space.
The horizontal distance reached by the mist ejected from the spray port is 0.3 [m] or more and 2 [m] or less,
The average particle diameter of the mist is 20 [μm] or more and 200 [μm] or less,
The agricultural house according to claim 5, wherein the maximum discharge pressure of the mist is 0.1 [MPa] or more and 0.8 [MPa] or less.
The horizontal distance reached by the mist ejected from the spray port is 0.6 [m] or more and 1.2 [m] or less,
The average particle diameter of the mist is 50 [μm] or more and 80 [μm] or less,
The agricultural house according to claim 6, wherein the maximum discharge pressure of the mist is 0.3 [MPa] or more and 0.6 [MPa] or less.
The outer shell is
A plurality of frames each having an inverted U-shape and serving as a structural material;
A cover that is laid on the plurality of frames in a state in which the plurality of frames are arranged in a direction intersecting a plane that each of the plurality of frames surrounds,
The agricultural house according to any one of claims 5 to 7, wherein the covering covers a three-dimensional object virtually defined by the plurality of frames over the entire circumference.