JPH089806A - Solution culture system - Google Patents

Abstract

PURPOSE:To enable prompt drainage of an excessive amount of a culture nutrient solution, optimal retention of water content and economical resource saving. CONSTITUTION:This solution culture system comprises the tray 6 which is placed on the downhill-graded frame 2, made of a thermally insulating material 7, having a tray structure where the tray top face opened, a supporter projected on the inner bottom face and the inner wall coated with a water-impermeable sheet 13, thus functioning as a flow chute for the solution 11, a shelf plate 16 which is perforated, supported at individual supporting positions to divide the inside of the tray 2 into two partitions, a moisture-keeping material 19 which is made of a hydrophilic porous material and placed on the shelf plate 16, a rock-wool pot 20 which is inserted into the through-hole on the shelf plate 16 and placed on the center supporter 8, a water-absorbing sheet 14 being in contact with the bottom face 20a of the pots and hanging down to the flow chute 11, a tube for feeding the culture solution into the tray 6, a thermally insulating lid covering the top opening on the tray 6 and a cover sheet 9 covering the whole parts of the lid and the tray 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydroponic cultivation apparatus for growing plants with a nutrient solution.

[0002]

2. Description of the Related Art A method for cultivating a plant with a nutrient solution is sand,
The medium method using gravel, rice husk charcoal, etc., and the culture solution is cultivated by submersing the culture solution in a cultivation tank (submerged solution), or the hydroponics method of pouring such as NFT (culture solution thin film method) Is generally known. Among these methods, hydroponics using a medium provides better oxygen supply to the roots of plants compared to the submerged hydroponic method, and causes growth disorders due to deficiency of trace elements (such as iron). There are few features. And, a hydroponics device using a recent medium melts rocks,
In many cases, rock wool formed like cotton is used as an artificial medium, and seedling blocks are planted in this medium and the culture solution is poured over.

However, in the above-mentioned hydroponic cultivation apparatus, it is necessary to drain the surplus water without retaining the culture solution in the medium. However, rockwool as the medium has a high water retaining capacity,
Since the water content in the medium is not sufficiently removed and the drainage efficiency is low, the humidity in the medium becomes excessive and oxygen deficiency occurs, which easily causes a problem of spoiling roots of plants.

Therefore, the inventor of the present invention provided a rock wool floor of the same material in the shape of clogs in the lower portion of the rock wool, and set the height as a cultivation floor to 100 to 175 mm, and the lower rock wool portion and the upper portion. A hydroponic device that guides the water inside the rockwool to lower the water content and keeps the optimum rhizosphere environment (moisture, etc.) for plants, with a fabric intervening between the rockwool medium. Was devised (JP-A-61-219323).

[0005]

However, in the above-described conventional rock wool cultivating apparatus, since the water retention capacity of the rock wool that is the cultivation bed is good, the nutrient solution retained in the rock wool is efficiently surplus. However, there is a drawback that the water cannot be discharged and the water stays.

In order to solve this problem, the cultivation bed is tilted so that the water content in the rock wool is expelled, or the rock wool is sucked by the capillary phenomenon.
Although we are trying to reduce the water content, this is a problem because the materials and equipment are complicated.

Further, there is a problem that the cloth interposed between the upper rock wool and the lower rock wool is clogged by the root waste and the like, which hinders drainage.

Further, rock wool, which is a cultivation bed, becomes an industrial waste due to the nature of the material after the cultivation is completed, and the above-mentioned conventional apparatus uses a large amount of this rock wool, so that resource saving cannot be achieved. There is a drawback that.

In addition to the above, in order to avoid the overwhelming state of the rockwool medium and to control it to the optimum humidity, a liquid supply device corresponding to the transpiration amount of the plant is provided with a solar radiation sensor, a moisture sensor and the like. Although a structure to be attached has been devised, there is a drawback that the cost of the entire device becomes high.

Therefore, in order to solve the above problems, the present invention allows the excess nutrient solution in the medium to be quickly drained, the inside of the medium can be maintained at an optimum water content, and resource saving can be achieved. The purpose is to provide an economical hydroponics device.

[0011]

Means for achieving the above object will be described below with reference to the drawings corresponding to the embodiments. The hydroponic cultivation device 1 of the present invention is installed on the installation surface G and is provided with a frame 2 having a slight downward slope in the longitudinal direction, and is installed on the frame 2, and is formed in a substantially concave shape with an open top surface. And a watertight sheet 13 covering the inner surface of the tray member 7 having heat insulating properties in which the supporting portions 8 are formed on both sides and the center of the inner bottom surface 7a, and a water impermeable sheet 13 for covering the inner surface thereof. A tray 6 which is supported by each of the supporting portions 8 and vertically divides the inside of the tray 6 into two parts, and which has through holes 17 at predetermined intervals in the longitudinal direction. A water retaining material 19 which is placed on the upper surface 16a and is made of a porous material having hydrophilicity;
While being fitted into each through hole 17 of the shelf board 16 and mounted, the tray board 7 is placed on the central support portion 8 in the tray member 7,
A pot 20 formed of rock wool and a water absorbing sheet covered by the central support portion 8 and provided in contact with the bottom surface 20a of the pot 20 and having a lower end hanging down into the flow path 11 of the tray 6. 14, a liquid supply pipe 21 arranged above the shelf plate 16 for supplying a nutrient solution into the tray 6, and a hole 24a through which the upper portion of the pot 20 penetrates. And a cover sheet 9 that covers the entire tray 6 together with the lid 24 having a heat insulating property.

Further, the supporting portion 8 at the center of the tray member 7
May have a structure in which a concave groove 10 is formed on the upper surface 8a and a temperature adjusting tube 15 is disposed in the concave groove 10. When the temperature adjusted nutrient solution is supplied to the temperature adjusting tube 15, The nutrient solution may be supplied to the liquid supply pipe 21 via the branch pipe 23 connected thereto, and the nutrient solution may be jetted to the pot 20 and the water retaining material 19 in the tray 6.

Further, on the upper surface 16a of the shelf board 16,
The water retaining sheet 18 may be laid and the water retaining material 19 may be placed on the upper surface of the water retaining sheet 18.

[0014]

From the liquid supply pipe 21 arranged above the shelf plate 16,
When the nutrient solution is supplied to the pot 20 and the water retaining material 19, the excess nutrient solution is sucked by the water absorbing sheet 14 in the pot 20 and drained to the flow path 11 below the shelf plate 16.

The excess nutrient solution that has been drained is guided to the flow path 11 in the tray 6 and drained because the tray 6 is inclined by the frame 2.

Further, since the tray member 7, the lid 24 and the shelf plate 16 of the tray 6 have a heat insulating property, the temperature inside the tray 6 and the pot 20 can be adjusted to an appropriate temperature. In particular, when the temperature control tube 15 is provided, the temperature in the tray 6 is appropriately controlled, and the environment is optimal for the growth of the plant P.

The roots of the plants P develop in the water retaining material 19 placed on the upper surface of the shelf board 16 as roots in the air, and the roots extending to the lower surface of the shelf board 16 develop as aquatic roots without causing root rot. The plant P grows in an optimal state by receiving a sufficient supply of nutrient solution.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the hydroponic cultivation apparatus according to the present invention will be described below with reference to the drawings. As shown in FIG. 1, the hydroponics device 1 of this embodiment includes a frame 2, a tray 6, and
The shelf board 16, the pot 20, and the lid 24 are roughly configured. In addition, as shown in FIG.
Are generally symmetrically configured and installed, but each has the same configuration, so only one device 1 will be described.

First, the frame 2 is composed of a plurality of supports 3, and each support 3 is composed of a pair of support legs 4 and a support beam 5. Each support body 3 has support legs 4 erected on an installation surface G such as the ground by, for example, inserting the support legs 4 into the ground, and a support beam 5 is provided between the support legs 4 substantially horizontally. And is formed in a substantially H shape. Then, as shown in FIG. 2, each support 3 is erected at predetermined intervals, and the height of the support beam 5 of each support 3 is, for example, about 1/100 between each support 3. It is set and provided with a slight downward slope.

Next, as shown in FIG. 3, the tray 6 is roughly composed of a tray member 7 and a water impermeable sheet 13. The tray member 7 is formed of a heat insulating material such as styrofoam, and has a substantially concave cross section with an open upper surface.

As shown in the transverse sectional views of FIGS. 1 and 2, the tray member 7 is provided with a rectangular supporting portion 8 which is continuously formed in the shape of a ridge in the center of the inner bottom surface 7a in the longitudinal direction. At the same time, support portions 8 having the same height as the support portions 8 are formed at both corners of the inner bottom surface 7a. In addition, a concave groove 10 is formed in the center of the upper surface 8a of the support portion 8 located in the center of these support portions 8.
Are formed.

A pair of spaces between the supporting portions 8 serve as flow paths 11 for draining the nutrient solution. The tray member 7 is placed on each support beam 5 of the frame 2 via the floor frame 12 as shown in FIG. That is, as shown in FIG. 2, the tray member 7 is fixed on the frame 2 with a downward slope in the longitudinal direction.

Next, the entire inner surface of the tray member 7 is covered with a water impermeable sheet 13. This impermeable sheet 1
Reference numeral 3 denotes a flexible resin sheet, which prevents the nutrient solution from leaking from the tray member 7. Both side edges of the water impermeable sheet 13 are provided so as to cover the upper edge portions 7b of both side plates of the tray member 7.

The impermeable sheet 1 is attached to the central support portion 8 of the tray member 7 covered with the impermeable sheet 13.
The water-absorbent sheet 14 is covered with the sheet 3 through 3. The water-absorbent sheet 14 is made of a hydrophilic fibrous material, for example, a nonwoven fabric such as felt, covers only the central support portion 8, and both end edges 14a, which are the end portions, are provided on both sides of the support portion 8. It hangs down and its tip edge is in contact with the bottom surface of the flow path 11.

A temperature control tube 15 is fitted in the groove 10 formed in the central support portion 8 of the tray member 7 with the water impermeable sheet 13 interposed therebetween. The temperature control pipe 15 is a temperature control device (not shown) for cooling and heating.
Is connected to a pump connected to, and the cooled or heated nutrient solution is allowed to flow.
In particular, the temperature of the pot 20 described later can be maintained at an appropriate level.

Next, the shelf plate 16 is a rectangular plate member made of styrofoam having the strength capable of forming the middle plate of the tray and having the same heat insulating property as the tray member 7, for example. As shown in FIG. 3 and FIG. 4, the tray 6 is placed through the tray 6 so as to be supported by the supporting portions 8 of the tray 6 described above. Then, as shown in FIG. 1, the inside of the tray 6 is vertically divided into two.

Further, the shelf 16 is penetrated in a substantially square shape with one side set to be longer than the width of the support portion 8 at the center of the tray 6, at predetermined intervals in the longitudinal direction, for example, every 200 mm. A hole 17 is drilled.

On the upper surface 16a of the shelf board 16, a water retention sheet 18 made of a non-woven fabric such as Agritech (trade name) is laid so as to cover the shelf board 16. A water-retaining material 19 such as a porous material having hydrophilicity, for example, rock wool granular cotton, which is the same material as the pot 20 described later, is placed with a predetermined thickness. In addition, as the material of the water retaining material 19, a material that is not corrosive, and is porous and hydrophilic is suitable.

Next, the pot 20 is, as shown in FIG.
It is a block-shaped member having a substantially cubic shape whose one side length is set to about 100 mm, which is substantially the same as one side of the through hole 17 of the shelf board 16 and is made of rock wool obtained by melting rock at a high temperature to form a fiber. ing.

The pot 20 is formed by the shelf 16
The bottom part is fitted into and attached to each of the through holes 17 through the water retention sheet 18, and is placed on the upper surface 8a of the support portion 8 at the center of the tray 6, and the bottom surface 20a thereof comes into contact with the water absorption sheet 14. ing.

In this embodiment, the pot 20 is
The plant P is planted with a recess formed substantially in the center of the upper surface, but the pot 20 used as a transplant bed when the plant P is raised is used as it is.

A pair of liquid supply pipes 21 are located on both sides of the pot above the shelf plate 16, and as shown in FIG. 4, the bracket 2 is attached to the upper edge portions 7b of both side plates of the tray member 7.
It is provided in a suspended state via 2. These supply pipes 2
1 is connected via the branch pipe 23 connected in the middle of the temperature control pipe 15 described above.

The above-mentioned temperature control pipe 15 serves both as a pipe for supplying the nutrient solution to the liquid supply pipe 21 and as a pipe for heat exchange for adjusting the temperature in the tray 6, and as shown in FIG. The temperature control pipe 15 is connected to a pump 27 arranged near one end 7c which is the inclined start end of the tray member 7, and is connected to a pump 27 from a nutrient solution tank 26 in which the nutrient solution is stored. Sends heated or cooled nutrient solution,
The nutrient solution is sent to the liquid supply pipes 21 through the branch pipes 23, and the supply ports 2 having a diameter of about 1 mm are formed on the side surfaces of the liquid supply pipes 21 at predetermined intervals, for example, 200 mm.
From 1a (see FIG. 4), the nutrient solution is sprayed and supplied to the pot 20 and the water retaining material 19.

The branch pipes 23 are provided at predetermined intervals of the temperature control pipe 15, for example, every 4 to 5 m, and liquid is supplied through through holes 17 provided in the shelf plate 16. It is adapted to be connected to the pipe 21. This branch pipe 2
A valve for adjusting the flow rate is built in 3 and the pressure difference is adjusted depending on the position of the temperature control tube 15. However, the pipe for supplying liquid may be omitted if the pipe is short and has a large diameter and high pressure.

Further, as shown in FIG. 2, in the hydroponic cultivation device 1, the other end portion 7 which is the inclined end of the tray member 7 is provided.
A discharge port 7e for discharging the nutrient solution flowing through the flow path 11 of the tray member 7 is provided at d. One end 25a of the circulation pipe 25 is connected to the discharge port 7e, and the other end 25b of the pipe 25 is connected to the nutrient solution tank 26 to circulate the excess nutrient solution in the tray 6. .

Next, the lid 24 is formed of a heat insulating material such as Styrofoam, which is the same material as the tray member 7,
As shown in FIG. 1, the upper opening of the tray member 7 is covered and closed. The lid 24 is provided with circular holes 24a corresponding to the through holes 17 of the shelf plate 16 at predetermined intervals, for example, 200 mm, and the upper portions of the pots 20 arranged in the tray 6 are provided. It penetrates and the upper surface is exposed.

Further, together with the lid 24, the tray member 7
A cover sheet 9 made of a resin sheet is entirely covered. The cover sheet 9 is formed with a cut or a hole through which the stem portion of the plant P passes.

Therefore, in the hydroponics device 1 thus constructed, since the tray member 7 is formed of a material having a heat insulating property such as styrofoam, the pot 20 inside the tray member 7 is located outside the tray 6. It is not affected by the temperature, and it is not necessary to constantly operate the temperature adjusting device for performing heating or cooling for controlling the inside of the tray 6 including the pot 20 to an appropriate temperature, so that energy saving can be achieved.

Further, the pot 20 is placed on the supporting portion 8, and the inside of the tray 6 is divided into upper and lower parts by the shelf plate 16,
Since the space serving as the flow path 11 is provided below the shelf board 16, the pot 20 has good ventilation, root rot of the plant P is unlikely to occur, and the shelf board 20 is supported together with the support portion 8 in the frame 2. Since it is inclined by, the drainage efficiency is improved.

Further, with this shelf board 16, the tray 6
This shelf board 1 because the inside is divided into upper and lower parts
6 can form two spaces, an upper layer to which the nutrient solution is supplied by the liquid supply pipe 21 disposed above 6 and a lower layer to serve as the flow path 11 through which the excess nutrient solution flows, and have good air permeability. It is possible to maintain an appropriate high humidity state. Then, by placing the water retaining sheet 18 and the water retaining material 19 on the upper surface of the shelf board 16 and disposing the liquid supply pipe 21 above the shelf board 16, the plant P on the upper surface side of the shelf board 16 A water-retaining material whose roots are supplied with an appropriate nutrient solution and have good air permeability 1
9 promotes the development of roots in the air, sufficient oxygen is absorbed, root rot does not occur, and the roots in the lower part of the shelf 16 extend into the flow path 11 and become underwater roots. , Can absorb a sufficient nutrient solution.

Further, according to the shelf plate 16, it is possible to obtain a covering effect on the root extending to the lower part of the shelf plate 16, and it is possible to suppress the temperature rise due to the direct rays of light under the shelf plate 16. .

The pot 20 made of rock wool has a property of sucking up moisture from the bottom water level to a certain height by the capillary phenomenon and keeping the moisture, but the bottom surface 20a of the pot 20 absorbs water of hydrophilic fiber. Since the sheet 14 is brought into contact with the end edge 14 a of the sheet 14 and hangs down from the flow path 11, the water in the pot 20 is absorbed by the water absorbing sheet 2.
While being absorbed by 0, the excess water is guided in the drooping direction. In other words, the tray member 7
The pot 20 is placed on the water absorbent sheet 14 made of hydrophilic fiber that covers the upper surface 8a of the central support portion 8 formed in the above, and the edge 14a of the water absorbent sheet 14 is hung down. Since the drainage power of water is obtained, the inside of the pot 20 is not overhumidified, and the humidity is maintained at a proper humidity, that is, a water content of 70 to 80% suitable for the growth of the plant P. It is possible to pot 20
With respect to the above plant P, stable water supply and lack of oxygen do not occur, and root rot does not occur.

The pot 20 holds plants,
It keeps the root of the root group, and has the role of guaranteeing water damage and other failures due to the water retention properties of rock wool. Further, since the pot 20 is formed smaller than the conventional one, it is easy to remove the pot 20 at the end of cultivation, and disinfection work can be reduced. Can be reduced and resource saving can be achieved.

Since the tray 6 is closed by the lid 24 and the tray 24 is covered with the cover sheet 9 together with the lid 24, the inside of the tray 6 is hermetically sealed, which is optimum for the root of the plant P. Humidity is maintained and by having heat insulation, it is not affected by the outside temperature,
The optimum rhizosphere environment is always obtained. That is, since the environment for the growth of the plant P is favorable, the growth of the plant P is improved and the yield and quality of the plant P are improved.

Further, in the above-mentioned embodiment, the temperature control tube 1
5 and the liquid supply pipe 21 are connected by a branch pipe 23, and the temperature control pipe 1
The heated or cooled nutrient solution is caused to flow into the tray 5, the temperature inside the tray 6 is adjusted, and the nutrient solution is jetted and supplied into the tray 6 through the branch pipe 23. With this configuration, the pump 27 that supplies the nutrient solution from the tank 26 can be configured with only one pump, and the entire apparatus has a simple configuration.

Therefore, according to the nutrient solution cultivator 1, the excess nutrient solution can be rapidly drained after the liquid is fed into the tray 6, and the optimum water content can be maintained. If the liquid is supplied after a lapse of time or more, it is possible to perform one liquid supply without considering the absorption amount of the plant P in particular. That is,
It is sufficient to supply sufficient liquid in a short time and to perform this intermittently. Therefore, if the liquid is supplied at intervals of 5 to 10 times a day, optimum water content is always maintained and abundant Can supply oxygen.

The excess nutrient solution in the tray 6 is removed by the device 1
Since it is inclined, it passes through the flow path 11 and is discharged from the drainage port 7e, but this nutrient solution returns to the nutrient solution tank 26 and is again sent to the solution supply pipe 21 by the pump 27, that is, recirculated. Since the nutrient solution (water and fertilizer) is not wasted,
You can save money.

Further, according to the hydroponic cultivation apparatus 1, since the temperature and the humidity are appropriately maintained, it is not necessary to directly consider the liquid supply due to the evaporation of the plants, and the temperature sensor and the humidity sensor, There is no need to attach a sun sensor, the device does not become complicated and it is easy to handle.

In the above embodiment, the temperature control tube 1
5 and the liquid supply pipe 21 are connected by a branch pipe 23, and the temperature control pipe 1
The heated or cooled nutrient solution is caused to flow into the tray 5, the temperature inside the tray 6 is adjusted, and the nutrient solution is injected and supplied into the tray 6 through the liquid supply pipe 21. Although an example has been described, as shown in FIG. 5, the temperature control pipe 15 and the liquid supply pipe 21 are not connected to each other and are separately configured, and only the liquid such as water for temperature control is provided in the temperature control pipe 15. Alternatively, the liquid supply pipe 21 may be configured to supply the nutrient solution with a pump from the nutrient solution tank by evaporating (product name) or the like. Also in this case, the same effect as that of the above-described embodiment can be obtained.

Further, in the above-mentioned embodiment, the temperature control tube 1
The example in which 5 is provided to control the temperature in the tray 6 has been described, but the tray member 7 that constitutes the tray 6 is described.
Since each of the shelf plate 16 and the lid 24 is a member having a heat insulating property such as styrofoam, and the entire tray 6 is covered with the cover sheet 9 together with the lid 24,
The temperature adjusting tube 15 may not be provided, or the temperature adjusting tube 15 may not be provided if the nutrient solution supplied by the liquid supply tube 21 is heated or cooled.

Further, in the above-mentioned embodiment, the water retaining material 19 is placed on the upper surface of the shelf board 16 via the water retaining sheet 18, but the water retaining sheet 18 is arranged so as to wrap the water retaining material 19. Preferably, the water retaining material 19 maintains sufficient water retaining ability, can supply oxygen and nutrient solution to the root of the plant P well, and if there is no fear of outflow of the water retaining material 19, the water retaining sheet 18 is not provided. May be.

[0052]

As described above, in the hydroponic cultivation apparatus according to the present invention, each of the tray member that constitutes the tray, the lid that covers the opening of the tray, and the shelf plate in the tray is formed of a material having a heat insulating property. In addition, since the entire tray is covered with a cover sheet, the temperature inside the tray is not affected by the ambient temperature of the device, that is, the outside air temperature, and the optimum temperature and This plant can be grown in a state where the humidity is maintained, that is, in an optimal rhizosphere environment. In particular, when a temperature control tube is arranged in this tray, energy can be saved because the temperature inside the tray becomes appropriate without constantly operating the temperature adjustment to control the inside of the tray to an appropriate temperature. There is an effect that it becomes possible. Since the environment for plant growth is favorable, there is an effect that the growth of the plant is improved, and the yield and quality of the plant are improved.

Further, according to this hydroponics device, the shelf plate is placed on the supporting portion in the tray member, and the inside of the tray is divided into upper and lower parts so that the shelf plate is arranged above the shelf plate. It is possible to form two spaces, an upper-layer space where the nutrient solution is supplied by the liquid supply pipe and a lower-layer space that serves as a flow path for the excess nutrient solution. It becomes possible to make it a moderately humid condition. Then, by placing a water retaining material on the upper surface of this shelf board and disposing the liquid supply pipe above this shelf board, the roots of the plants on the upper surface side of this shelf board receive an appropriate supply of nutrient solution. At the same time, the water retention material with good ventilation will promote the development of roots in the air,
Sufficient oxygen is absorbed, and it grows without root rot.Because the roots form in the channel at the bottom of the shelf and become water roots, sufficient nutrient solution is absorbed. This has the effect of improving plant growth.

Further, according to this shelf board, it is possible to obtain a covering effect on the root extending to the lower part of the shelf board, and since there is no incidence of a direct ray of light on the lower part of the shelf board, the temperature due to this ray is increased. The effect is that the rise can be suppressed.

Further, according to this hydroponic cultivation apparatus, the water absorbent sheet of hydrophilic fiber is brought into contact with the lower surface of the pot formed of rock wool, and one end of the sheet is hung in the flow path. The excess water (nutrient solution) in
The water is absorbed by the water-absorbing sheet, and the water is guided in the hanging direction, which has the effect of appropriately lowering the water content of the pot. In other words, the pot does not become over-humidified, and it becomes possible to maintain an appropriate humidity immediately after supplying the nutrient solution to retain the water, causing no oxygen deficiency in the plants on the pot and root rot. The effect is that it does not occur.

Further, according to this pot, the rockwool pot for raising seedlings is used as it is, so that the plant retains the root and the base of the root group, and the water retention of the rockwool causes a failure such as water outage for about one day. It also has the effect of being stable enough to endure.

Since this pot is smaller than the conventional one and is formed to have a necessary minimum size, it is easy to remove the pot after completion of cultivation, and the pot made of rock wool is used. Since the amount is small and the amount of waste is reduced, it is possible to save resources and to be economical.

Further, the temperature control pipe and the liquid supply pipe are connected by a branch pipe, and the heated or cooled nutrient solution is flown through the temperature control pipe,
By adjusting the temperature in the tray and injecting and supplying the nutrient solution into the tray through the supply pipe, the pump for supplying the nutrient solution from the tank can be provided by combining the temperature adjustment and the supply solution. Since it can be configured only by the base, there is an effect that the entire device can be made a simple configuration.

Therefore, according to the nutrient solution cultivating apparatus of the present invention, it is possible to rapidly drain the excess nutrient solution after supplying the solution into the tray, and it is possible to maintain the optimum water content. If the liquid is supplied after a certain period of time, it is possible to perform the liquid supply once without considering the absorption amount of the plant, that is, the liquid is not continuously supplied, and the liquid is sufficiently supplied in a short time. By carrying out intermittently, there is an effect that the optimum nutrient solution can be supplied to the plant.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a hydroponics device according to the present invention.

FIG. 2 is a schematic side view of the hydroponic cultivation apparatus according to the embodiment.

FIG. 3 is an exploded side sectional view of the hydroponic cultivation apparatus according to the embodiment.

FIG. 4 is a partially cut perspective view of the hydroponic cultivation apparatus according to the embodiment.

FIG. 5 is a partially cut perspective view of a hydroponics device according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hydroponics device 2 ... Frame 6 ... Tray 7 ... Tray member 7a ... Inner bottom surface 8 ... Support part 8a ... Upper surface 9 ... Cover sheet 10 ... Recessed groove 11 ... Flow path 12 ... Floor frame 13 ... Impermeable sheet 14 ... Water absorbing sheet 14a ... One end (edge) 15 ... Temperature control pipe 16 ... Shelf 16a ... Upper surface 17 ... Through hole 18 ... Water retaining sheet 19 ... Water retaining material 20 ... Pot 20a ... Bottom 21 ... Water supply pipe 23 ... Branching pipe 24 ... Lid 24a ... Hole G ... Installation surface (ground)

Front Page Continuation (72) Inventor Hiroki Narukage 1-18-1 Kyobashi, Chuo-ku, Tokyo Shiai Kasei Co., Ltd.

Claims (4)

[Claims] 1. A frame which is erected on an installation surface and has a slight downward slope in the longitudinal direction, and a frame which is installed on the frame and has a generally concave shape with an open upper surface and both inner surface and A tray member having a heat insulating property in which a supporting portion is formed to project in the center, and a water impermeable sheet that covers the inner surface of the tray member, and a tray that serves as a flow path for the nutrient solution, and is supported by each of the supporting portions, 2 inside the tray up and down
A shelf board that is divided and provided with through holes, is placed on the upper surface of the shelf board, and is a water retaining material made of a porous material having hydrophilicity, and is fitted into each through hole of the shelf board and mounted. A pot formed of rockwool placed on a central support portion in the tray member; and a pot covered with the central support portion, in contact with the bottom surface of the pot, and having a lower end A water-absorbing sheet that hangs down into the flow path of the tray, a liquid supply pipe that is disposed above the shelf plate and supplies the nutrient solution into the tray, and a hole through which the upper portion of the pot penetrates, A hydroponic cultivation device comprising: a lid having a heat insulating property that covers an upper surface opening; and a cover sheet that covers the entire tray together with the lid. 2. The hydroponic cultivation device according to claim 1, wherein a recessed groove is formed on the upper surface of the support portion at the center of the tray member, and a temperature control tube is disposed in the recessed groove. . 3. The temperature-adjusted nutrient solution is supplied to the temperature control pipe, and the nutrient solution is supplied to the liquid supply pipe through a branch pipe connected midway. Hydroponics equipment. 4. The hydroponic culture according to claim 1, 2 or 3, wherein a water retaining sheet is laid on the upper surface of the shelf board, and the water retaining material is placed on the upper surface of the water retaining sheet. apparatus.