JPH0372816A - Apparatus for cultivating plant - Google Patents

Abstract

PURPOSE:To efficiently cultivate plants, such as vegetable, at a high density by providing the lateral side of an artificial light source with a cultivation bed in each cabinet and simultaneously setting light quantity for the plants facing the artificial light source so as to provide predominant antigeotaxis. CONSTITUTION:A cultivation bed 7 for cultivating plants is arranged at a suitable place located at the lateral side of artificial light sources 6 in each cabinet 9 and light irradiating the plants facing the aforementioned artificial light sources is simultaneously set at a higher quantity than that providing predominant antigeotaxis. Thereby, lighting power cost is reduced to simultaneously regulate the light quantity of the artificial light sources. As a result, balance can be kept between photoaxis and the antigeotaxis.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plant cultivation device for cultivating plants such as vegetables using illumination from an artificial light source.

(Prior Art) Devices for cultivating plants using an artificial light source are widely known, and one example is shown in FIG. This conventional device is a wind tunnel type growth cabinet (a) in which a cultivation chamber (a) is provided with a wind tunnel (C) for circulating air, and a fan (d) circulates the air and adjusts the wind speed. temperature adjustment means e;
Temperature adjustment means f, Co, and concentration adjustment means g are provided to adjust the temperature, humidity, and COt concentration within the growth cabinet a. An artificial light source such as a plurality of fluorescent lamps is provided above the cultivation room, and a cultivation bed i is provided below it.

A culture solution is supplied to the cultivation bed i from a culture solution supply means j. As shown in FIG. 7, plant A grows in a controlled environment, provided with light, culture solution, and CO2.

The above plant cultivation device has an artificial light source and a cultivation bed i, respectively.
Although it has a single layer structure, there is also a multilayer structure instead. There are also types in which the cultivation bed is supported by an endless conveyor, and the cultivation bed circulates within the cultivation room as the endless conveyor moves, and there are also types in which the cultivation bed is arranged in a cylindrical shape around an artificial light source. .

(Problem to be solved by the invention) The above conventional example has the following problems.

■ In plant cultivation equipment that uses artificial light sources, lighting power costs account for a large proportion of production costs, so it is important to improve lighting efficiency in order to reduce production costs. By the way, in the above conventional example, the traditional arrangement method is that the artificial light source is placed above and the cultivation bed is placed below, so the light emitted above from artificial light sources such as fluorescent lamps cannot be used effectively. There's a problem.

(2) The above conventional example is a relatively large-scale plant equipped with a wind tunnel, temperature control means, etc., and may be called a plant factory. Therefore, it is impossible to bring this directly into the home and use it as a home garden.For example, you can install a plant cultivation device for self-consumption in a room in an apartment and grow vegetables easily and in a short period of time. It would be great if this could be done, but it is difficult to achieve this from conventional examples.

■ The above conventional examples are relatively large-scale, making it difficult to change the cultivation area and cultivate multiple varieties. The above-mentioned conventional examples cannot meet the demand for simply and easily increasing the cultivation area as needed, or for providing optimal environmental conditions to each variety of plants when cultivating multiple varieties.

■ There are cases where it is desired to grow plants at a high density on a limited floor space. In particular, it is no exaggeration to say that the success or failure of cultivation at home or in a shopping center is determined by the effective use of floor space, but the above-mentioned conventional examples are insufficient in this regard.

In order to improve these insufficiencies, the
There is a known example related to Publication No. -94035.

In this known example, a total of four artificial light lamps are arranged at 90° intervals on a cylindrical surface in the center of the cultivation chamber, plants are arranged on a cylinder around them, and a holding device that holds the lamps is rotated. This was made possible.

According to this method, the amount of cultivation per floor area can be increased and the light irradiation surface can be used effectively, but there are still the following technical problems.

In other words, since the artificial light lamps of this known example that emit artificial light are of a reflective type (for example, see Japanese Patent Application Laid-Open No. 106230/1982), the pair of artificial light lamps are not mutually sensitive to each other. There is a problem in that the respective irradiated lights on the opposite side are blocked by the lamps themselves and the amount of light is lost upon reflection, making it impossible to fully and effectively utilize the irradiated light from the artificial light lamps.

In addition, in this known example, it is difficult to control the amount of solution supplied to the plants that are arranged in a cylindrical shape and held in the holding device because the holding device rotates, and therefore maintenance management for the normal growth of the plants is difficult. In addition, it is inevitable that the structure of the rotational drive device of the holding device will also become complicated.

(Means for Solving the Problems) The present invention aims to solve the above problems, and has the following first features.
This invention includes the invention and the second invention.

The first invention arranges a cultivation bed for cultivating plants at a suitable place located on the side of an artificial light source in the cabinet, and
The present invention relates to a plant cultivation device in which the amount of light irradiated onto the plant facing the artificial light source is set to a value at least such that the tapered nature is more dominant than the anti-gravity trend.

This first invention is distinctive in that it departs from the traditional idea that light should be on top and cultivation beds should be on the bottom.
As is well known, plants have a tapered nature that causes them to grow in the direction opposite to the direction of gravity, and also have a tapered nature that causes them to grow in the direction of light. When plants are grown in such a way that they grow downward on this cultivation bed, and the anti-gravity trend is dominant, as the plants grow, they will bend into a single character shape and change their growth direction from downward to upward. , its sufficient growth cannot be expected (the conventional example shown in FIG. 7 is based on this).

). However, when tapering becomes dominant and antigravity trends become negligible, plants in cultivation beds placed above artificial light sources can grow normally downward. The present inventor has confirmed through numerous experiments that when the amount of light from the light source to the plant exceeds a certain value, the taper becomes dominant and the anti-gravity trend becomes negligible. This is generally true when a cultivation bed is placed to the side of an artificial light source, and by adjusting the light intensity of the light source and balancing the taper with the anti-gravity trend, normal plant growth can be achieved. is realized.

The following two aspects are representative as specific aspects of the first invention. The first aspect is to arrange the artificial light source on a vertical surface inside the cabinet, and to arrange a cultivation bed with water retention on the vertical surfaces located on both sides of the artificial light source. The second aspect is to arrange the artificial light source on a horizontal plane inside the cabinet, and to arrange a cultivation bed with water retention on the horizontal plane located on both sides of the artificial light source.

As the artificial light source used in the first invention, it is preferable to use a plurality of fluorescent lamps arranged in parallel. In the first aspect of the invention, it is preferable that the cabinet is of a closed type, and that an external culture solution supply device and an environmental gas adjustment device are connected to the cabinet via pipes.

Furthermore, it is preferable that the cabinet used in the first invention is configured with three cabinet constituent elements, with the central cabinet constituent element supporting the artificial light source and the cabinet constituent elements on both sides supporting the cultivation bed.

Further, the first invention includes the following device, namely, a plurality of cultivation units each including an artificial light source, a cultivation bed, and a culture solution distribution means in a cabinet, and a single culture solution supply device, each cultivation unit having a pipe. The present invention can be implemented in a plant cultivation device connected to a culture solution supply device via a.

In this apparatus, it is possible to further add a single environmental gas adjustment device and to connect this environmental gas adjustment device and each cultivation unit via a pipe. In this case, it is preferable to incorporate the culture solution supply device and the environmental gas adjustment device into the same control box.

Further, in the above-mentioned apparatus, it is preferable to arrange a plurality of cultivation units so as to overlap each other, and the following two embodiments are representative as specific embodiments thereof. In the first aspect, a plurality of cultivation units are arranged so as to be stacked in the vertical direction. In the second aspect, a plurality of cultivation units are arranged so as to be overlapped in the left-right direction.

In the first aspect, it is preferable that the whole or part of the cultivation unit is configured to be extractable.

In addition, it is best to use a cultivation unit for this purpose that has an artificial light source placed on a horizontal surface inside the cabinet, and a cultivation bed placed on each horizontal surface located on both sides of the artificial light source inside the cabinet. . Furthermore, it is reasonable to use a cabinet that is formed in a rectangular parallelepiped shape with the minimum height relative to the width and depth.

In the second mode a, it is preferable that each cultivation unit is guided and supported so as to be movable in the left-right direction. In this case, it is preferable that the cabinet opens left and right around the rear pivot, and a cultivation bed is supported on each of both sides of the cabinet. Furthermore, it is optimal to use a cultivation unit in which an artificial light source is placed on a vertical surface within the cabinet, and cultivation beds are placed on each of the vertical surfaces located on both sides of the artificial light source within the cabinet. . Furthermore, it is reasonable to use a cabinet that is formed in a rectangular parallelepiped shape with the minimum width relative to the height and depth.

In a second invention, an artificial light source is disposed on a horizontal surface within a cabinet, and a cultivation bed for cultivating plants is disposed on a horizontal surface located above the artificial light source within the cabinet, and further, The amount of light irradiated to the plants planted in the cultivation bed and facing the artificial light source is set to a value that makes the tapered pattern predominant over the anti-gravity trend, and the amount of light is set below the artificial light source in the cabinet. This relates to a plant cultivation device in which a hydroponic cultivation bed is arranged on a horizontal surface.

In this second invention, plants of different varieties can be cultivated on the upper cultivation bed and the lower hydroponic cultivation bed, respectively.

(Function) According to the first invention, since the cultivation bed is arranged on the side of the artificial light source, it is possible to effectively utilize not only the light irradiated on one side of the artificial light source but also the light irradiated on the other side. , it is possible to reduce electricity costs for lighting. Since the cultivation bed has water retention properties, there is no problem even if the cultivation surface faces downward or to the side. Moreover, by adjusting the light intensity of the artificial light source, it is possible to achieve tapering and anti-gravity trends. As a result, cultivation beds can be placed on both sides of the artificial light source, for example, above and below or on the left and right, as described above, making it possible to cultivate plants at high density. Further, according to the first invention, it is possible to provide a plant cultivation device with a compact and simple structure in which an artificial light source and a cultivation bed are arranged in a cabinet, so that this device can be brought into a narrow installation place such as in a home. become. Furthermore, if the cultivation bed is arranged on both sides of the artificial light source, the cabinet can be made into a rectangular parallelepiped, and the thickness of the cabinet, which is determined by the distance between the two cultivation beds, can be made small. Containment becomes advantageous.

In particular, in the case where the artificial light source and cultivation bed are arranged on a vertical plane, the floor space for installing the device can be reduced.
Ideal for use in home gardens, etc. In addition, in the first invention, if an external culture solution supply device and an environmental gas adjustment device are connected to the cabinet via a pipe and controlled by a microcomputer,
Even amateurs can grow vegetables and other plants at home.

According to the unitized embodiment of the first invention, a desired variety of plants can be cultivated in each of the plurality of cultivation units, and the cultivation area can be easily and easily increased or decreased by increasing or decreasing the number of units. In addition, each cultivation unit can be made simple and compact, with only an artificial light source, a cultivation bed, and a means for distributing a culture solution, and a single culture solution supply device existing externally or a single culture solution supply device in addition to this can be used. By connecting one environmental gas adjustment device and the plurality of cultivation units via pipes, it is possible to appropriately supply the culture solution to each cultivation unit, and in addition to this, the environmental conditions of each cultivation unit can be can be carried out appropriately for each.

In the embodiment described above, by arranging the plurality of cultivation units so as to overlap each other, it becomes advantageous in terms of effective use of the floor space of the installation location. This allows for high-density plant cultivation on a limited floor space.

According to the second invention, in addition to the effect of the first invention on the ridges, since the artificial light source is arranged on the horizontal plane in the cabinet, the plants planted in the cultivation bed arranged above the artificial light source and the The plants cultivated on the hydroponic beds arranged at the lower side can be of different varieties, and furthermore, it is possible to cultivate a wide variety of plants at high density on a limited floor area. be able to.

(Embodiment) FIGS. 1 to 3 show a first embodiment of the present invention. This first embodiment includes a plurality of cultivation units 1, a control box 2, an air supply pipe 3 connecting both, an exhaust pipe 4,
It is composed of a liquid supply pipe 5.

Each cultivation unit 1 has the same structure, includes a plurality of fluorescent lamps 6 as an artificial light source, cultivation beds 7 arranged on both sides of these fluorescent lamps 6, and a cultivation solution distributed to the cultivation beds 7. Distribution means 8 and a cabinet 9 housing them
It consists of In this embodiment, the cultivation bed 7 has a box-shaped bottom made of rock wool, but as an alternative, water or nutrient solution may be dripped from above or intermittent from the side into the area where the plants are planted. Cultivation unit 1 maintains sufficient water retention after being supplied by spraying.
Any suitable material can be selected as long as it can secure the initial mounting position against gravity.

The cabinet 9 is formed into a rectangular parallelepiped shape with a height of 2 m, a depth of 2 m, and a width of 1 m (therefore, it is a rectangular parallelepiped shape with the minimum width), and includes three parts: a left outer box 91, a right outer box 9r, and a fluorescent lamp support frame 9C. Consists of two cabinet components. Left outer box 9I! , and the right outer box 9r are formed in a symmetrical shape, and both outer boxes 91.9r form a cabinet exterior body, and the fluorescent lamp support frame 9C is housed inside thereof.

The fluorescent lamp support frame 9c is located in the center of the space within the cabinet 9, and is formed into a rectangular frame that covers most of its vertical cross section. A plurality of horizontally arranged fluorescent lamps 6 are arranged and supported at equal intervals in the vertical direction on this support frame 9C. Further, as shown in FIG. 3, this support frame 9c
0a, and can rotate left and right about the pivot 10a.

The front plate 11 of each of the left and right outer boxes 91.9r has a transparent glass window 12 so that the inside of the cabinet 9 can be observed, and also has a CO2 concentration display panel, an Of concentration display panel,
Equipped with temperature display panel, humidity display panel, etc. This front plate 11 can be opened forward as shown by phantom lines in FIG.

Further, a cultivation bed 7 made of rock wool is provided over the entire inner surface of each side plate 13 of the left and right outer boxes 91s9r. Rock wool has water-retaining properties, retains culture solution for a long time, and is suitable for the growth of plant roots. Left and right outer boxes 9
1.9r is configured such that the rear plates 15 are connected to each other by a hinge 10 having the pivot shaft 10a, and can be opened left and right about the pivot shaft 10a. Furthermore, the left and right outer boxes 911
Branch pipe portions of the air supply pipe 3, liquid supply pipe 5, and exhaust pipe 4 for each cultivation unit 1 are connected to the top plate 16 and bottom plate 17 of 9r.

As shown in FIG. 1, the cultivation units 1 are arranged so as to be overlapped in the left-right direction, and are guided and supported so as to be movable in the left-right direction. For this reason, a pair of upper and lower guide rails 18 extending horizontally along the back surface of each cultivation unit 1 is provided. Furthermore, guide rollers 19 that move on the guide rails 18 are attached to the outer ends of the rear plates 15 of the left and right outer boxes 9L9r of each cultivation unit 1. Further, a plurality of casters 20 are attached to the bottom plate 17 of the left and right outer boxes 91.9r.

Since the cultivation units 1 are arranged on the floor so as to be in contact with each other in the closed state, a large amount of plants can be cultivated while occupying a small amount of floor space. When planting or harvesting seedlings with the cultivation unit 1 opened, other cultivation units 1 must be moved along the guide rail 18 to enable the cultivation unit 1 to be opened. Then, as shown in FIGS. 1 and 3, the left and right outer boxes 91.9r may be opened. The reason why the fluorescent lamp support frame 9c has a rotatable structure is that, for example, when harvesting the plant A in the left outer box 91, the fluorescent lamp support frame 9C can be placed in the position shown by the imaginary line in FIG. This is to make it easier to evacuate and harvest. Of course, when the cultivation unit 1 is in the closed state, it is preferable that the fluorescent lamp support frame 9C is located at the center of the cultivation unit 1, and it is preferable to provide a position defining means (not shown) for this purpose.

The control box 2 incorporates a culture solution supply device and an environmental gas adjustment device. This control box 2 is also formed into a rectangular parallelepiped of approximately the same size as the cultivation unit 1, and is arranged so as to be adjacent to the cultivation unit 1 located at the end. The culture solution supply device is connected to the culture solution distribution means 8 of each cultivation unit 1 through the solution supply pipe 5.

Then, in the culture solution supply device, the culture solution whose supply timing and supply amount are controlled by microcomputer control is distributed to the cultivation bed 7. In the example shown in FIG. 2, the culture solution distributing means 8 is of a spray type, but a drip type or the like may be adopted. This provides plants with the right amount of water and nutrients at the right time.

The environmental gas adjustment device has at least one of the following functions: temperature adjustment function, humidity adjustment function, CO, 1 degree adjustment function, 02 concentration adjustment function, and wind speed adjustment function. It has all the functions. The environmental gas adjustment device passes through the air supply pipe 3 to each cultivation unit 7).
Supply gas with adjusted air flow and wind speed in the right amount and at the right time.

Further, the gas within each cultivation unit 1 is returned to the environmental gas regulating device through the exhaust pipe 4, where a portion is discharged to the outside, and the remainder is regulated and reused. Adjustment of temperature, etc. is performed using temperature sensors, humidity sensors, and C
Based on the signals sent from the O, W temperature sensor and the 02 concentration sensor, the control is performed by making full use of the microcomputer based on the comparison with these signals.

In the illustrated example, each of the air supply pipe 3, exhaust pipe 4, and liquid supply pipe 5 consists of a main pipe part and a branch pipe part that branches from this pipe part and connects to each cultivation unit 1, and the cultivation unit 1 is added. In this case, it is only necessary to connect the branch pipe section to the main pipe section as necessary. The branch pipe section is composed of a flexible tube with ample length, and can follow the movement and opening/closing movement of the cultivation unit 1. This example:
This is suitable when the internal environment of each cultivation unit 1 may be common. If you want to cultivate a wide variety of plants, it is necessary to individually adjust the conditions of the culture solution and atmospheric gas for each cultivation unit (1), so the piping between each cultivation unit (1) and the control box (2) must be connected to individual piping. That's good.

The control box 2 also has the function of adjusting the illumination time, illuminance, etc. of the fluorescent lamp 6.

Each cultivation unit 1 has a structure in which a plurality of fluorescent lamps 6 are arranged in parallel on a vertical plane in the center of the cabinet 1, and cultivation beds 7 with water retention properties are arranged on each vertical plane located on both sides of the fluorescent lamps 6. Therefore, the light from the fluorescent lamp 6 can be used efficiently. Plant A planted on the cultivation bed 7 is influenced by the anti-gravity trend and the tapering pattern, and grows in a balanced direction. By the way, when the light intensity of the fluorescent lamp 6 is set to a value equal to or higher than the above value, the tapered nature becomes dominant, and the plant A can be grown so that the anti-gravity trend can be almost ignored.

For example, in the cultivation of lettuce, under conditions where the distance between the fluorescent lamp 6 and the cultivation bed 7 is 230 mm, and the fluorescent lamp 6 is turned on at all times, the photon flux density in the wavelength range of 40 to 70 nm (the wavelength range that chlorophyll absorbs) is (Photosynthet
ic Photon Flax Density :P
PFD) of 200 μE/bo/s light, preferably PP
By irradiating light with an FD of 300μE/r+(/S), lettuce could be grown with the tapered nature becoming predominant and the anti-gravity trend being almost negligible.In this way, the fluorescent light 6 By setting the amount of light to a value equal to or higher than the above value, it is possible to grow the plants A in a direction perpendicular to the cultivation bed 7, that is, in a horizontal direction.

The fluorescent lamp 6 is a three-wavelength fluorescent lamp (FL-EX).
), daylight fluorescent light (PL-D), plant fluorescent light (FL)
-PG), and any of them may be used, but PPF
In relation to D, PL-EX is more efficient. In the above case, a fluorescent lamp 6 was used as the artificial light source, but a commercial pressure sodium lamp, a metal halide lamp, or the like can also be used.

The cultivation unit 1 can be used alone as a plant cultivation device. In this case, as in the above example, the control box 2 or the like placed outside may be connected via a pipe to supply the culture solution, but it is also possible to incorporate these into the cabinet 1. be. Alternatively, it is also possible to create an open-type simple plant cultivation device that incorporates only a drip-type culture solution supply device and omits other adjustment devices.

The cultivation bed 7 can also be configured as shown in FIG. That is, the outer periphery of the cultivation bed 7 is composed of a box shaped like a cylinder with a bottom made of thin sheet metal material, and the outer circumference of the side wall 7s
In this example, holes 9h are intermittently arranged and opened in the same direction of the cultivation bed 7 and the fluorescent lamps 6 on the inner surface of the outer box 9j2.9r of the cabinet 9 into which the outer peripheral box of the cultivation bed 7 is slidably fitted. ,91.9
A protrusion 7p is provided to protrude and fit into any one of j...-.-. This protrusion 7p extends from the hole 9h to the adjacent hole 9i.
, 9j...---, the sizes are set so that they can be successively fitted in accordance with the movement of the cultivation bed 7 when changing the distance between the cultivation bed 7 and the fluorescent lamp 6. be. Hole 9h is farthest from fluorescent lamp 6, and hole 91.9j---
The hole deviated toward the -... side is opened at a position closer to the fluorescent lamp 6. In other words, the cultivation bed 7 is adjusted according to the growth of the plant.
and the distance between the fluorescent lamp 6 and the holes 9h, 9i, and the projection 7p.
It can be changed by selecting any one of 9j------.

This interval is changed so that the amount of irradiation irradiated to the plants facing the fluorescent lamp 6 does not lose the predominance of taperedness over anti-gravity trend.
. . . The numerical values of the amount of irradiation light in each hole are displayed as labels 15a, 15b, 15c . . . on the outside of the holes.

Incidentally, the means for changing the above-mentioned interval is the protrusion 7p of this embodiment.
In addition to fitting the holes 9h and 91.9j by appropriately selecting the fittings, the protrusions are threaded bodies and the holes 9h and 9 are fitted.
As an alternative to the 1% 9J, the cultivation bed 7 can also be screwed and fixed to the cabinet 9 through the elongated hole and its outwardly protruding screw head. Also, the protrusion is a pinion, the hole or elongated hole is configured with a rack, and the pinion is engaged with this,
It is possible to use other appropriate means, such as changing the above-mentioned interval by driving the binion with an electric motor.

5 and 6 show a second embodiment of the invention.

This second embodiment also mainly consists of a plurality of cultivation units 51 and a control box 52 that perform the same functions as the first embodiment, an air supply pipe, an exhaust pipe (not shown), and a liquid supply pipe 55 that connect the two. ing.

Each cultivation unit 51 includes a cabinet 59, a plurality of fluorescent lamps 56 as artificial light sources arranged on a horizontal plane inside the cabinet 59, and water-retaining lights arranged on the horizontal plane above and below these fluorescent lamps 56, respectively. It consists of a cultivation bed 57 equipped with.

The cabinet 59 is formed into a rectangular parallelepiped shape with the minimum height relative to the width and depth, and is composed of an exterior case 59a, an upper drawer 59u, an inner drawer 59C1, and a lower drawer 59N. The upper drawer 59u has the shape of a flat rectangular parallelepiped with no bottom and a top, and the cultivation bed 57 is supported on the ceiling surface of the upper drawer 59u. The inner drawer 59c has a rectangular frame and supports the plurality of fluorescent lamps 56. The lower drawer 591 is shaped like a flat rectangular parallelepiped with no bottom and has the cultivation bed 57 on its bottom surface.
is supported. These drawers 59u, 59c, 5
91 is supported by the exterior case 59a so as to be movable forward and backward and detachable. For this reason, each drawer 59u, 5
Guide means 64 are provided between both sides of 9c and 5Le and locations corresponding to the respective drawers on the inner side of the outer case 59a.
is provided. As this guide means 64, the sixth
As shown in the figure, drawers 59u, 59c, 5! I
It is preferable to employ an intermediate guide 64a that moves forward by 1/2 the distance as R1 moves forward.

The cultivation units) 51 are arranged so as to be vertically overlapped as shown in FIGS. 5 and 6. Further, a control box 52 is arranged below the plurality of cultivation units 51 loaded. This control box 52 incorporates a culture solution supply device and an environmental gas adjustment device, as in the case of the first embodiment. The culture solution supply device and each cultivation unit 51 are connected via a solution supply pipe 55, and the appropriate amount of culture solution is sent to the culture solution distribution means (not shown) in each cultivation unit 51 at the appropriate time. It is distributed to the cultivation beds 57 through the channels. The relationship between the environmental gas adjustment means and each cultivation unit 51 is also the same as in the first embodiment, so the explanation will be omitted.

In the illustrated example, each cultivation unit 51 is completely independent, but the exterior case 59a of each cultivation unit 51 can be shared. In other words, a common exterior case is used to accommodate a large number of drawers, and the upper, middle, lower,
Each drawer 59u, 5 in the order of upper, middle, lower...
9c, 5'll! It is also possible to accommodate.

Each cultivation unit 51 has a plurality of fluorescent lamps 56 arranged side by side on a horizontal plane in the center of the cabinet 59, and cultivation beds 57 each having water-retentive properties on the horizontal plane located on both sides of the fluorescent lamps 56.
The structure is such that the light from the fluorescent lamp 56 can be used efficiently. By increasing the PPPD of the fluorescent lamp 56, the plants A on the upper and lower cultivation beds 57 can grow normally. Note that the cultivation bed 57 located on the lower side can be configured as follows.

That is, the solution cultivation bed 57 can be formed by immersing the root hairs of plants in a solution supplied to the bottom of the lower drawer 59f. Alternatively, water may be introduced into the bottom of the lower drawer 59f, and a float containing plants planted therein may be floated on the water surface (including the flowing water surface), or plants may be planted without forming a water surface. A hydroponic cultivation bed can be used in which water is sprayed in the form of a mist at appropriate time intervals, or plants can be planted on a cultivation bed that has water retention properties and water or a solution is dripped onto this. Rock wool plowing is used, sand plowing is where plants are planted in a large number of sand aggregates that have sufficient water retention, or gravel plowing is used where the sand in sand plowing is replaced with gravel. Any known material can be selected and used.

The cultivation unit 51 can be used alone as a plant cultivation device, and in that case, the same applies as described in the first embodiment.

(Effects of the Invention) According to the present invention, it is possible to provide a plant cultivation device that can enhance the illumination efficiency of an artificial light source and can perform high-density plant cultivation on a limited floor space.

Further, according to the present invention, it is possible to provide a plant cultivation device that can be installed in a home, a shopping center, etc., and can grow plants simply and in a short period of time.

Furthermore, according to the present invention, it is possible to easily change the cultivation area and to provide a plant cultivation apparatus suitable for cultivating a wide variety of plants.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention.
The figure is a perspective view of the whole, FIG. 2 is a cross-sectional side view of the cultivation unit, and FIG. 3 is a vertical cross-sectional plan view of the cultivation unit. FIG. 4 is an enlarged longitudinal sectional plan view of a part of the cultivation unit showing a modification of the first embodiment. 5 and 6 show a second embodiment of the present invention, FIG. 5 being a partially cutaway side view of the whole, and FIG. 6 being a perspective view of the main part. FIG. 7 is a schematic diagram showing a conventional example.

Claims (2)

[Claims] (1) A cultivation bed for cultivating plants is placed at an appropriate location on the side of the artificial light source in the cabinet, and the amount of light irradiated to the plants facing the artificial light source is adjusted to a light trend rather than an anti-gravity trend. A plant cultivation device that is set to a predominant amount. (2) An artificial light source is provided on a horizontal surface within the cabinet, and a cultivation bed for cultivating plants is provided on the horizontal surface located above the artificial light source within the cabinet, and furthermore, a cultivation bed for cultivating plants is provided. The amount of light irradiated to the plants planted in the floor and facing the artificial light source is set to a value that makes the light trend more dominant than the anti-gravity trend, while the plant is located below the artificial light source in the cabinet. A plant cultivation device consisting of a hydroponic bed placed on a horizontal surface.