JP2012000047A - Plant production system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plant production system which can sufficiently supply light at a favorable wavelength according to the growth of the plant while reducing the energy for producing the plant, a production cost, environmental loads or the like.SOLUTION: The light subjected to a wavelength conversion by a wavelength conversion optical plate 3 is irradiated on a reflecting prism 5 from an end part in a plane direction thereof and further, is supplied to a plant 7 arranged on the lower surface side by a reflection film 15 of the reflecting prism 5 so that the energy for producing the plant 7, the production cost and the environmental loads or the like are largely reduced. In fact, since approximately 70% of the sunlight irradiated from the upper surface of the wavelength conversion optical plate 3 is focused in the end part side in the plane direction of the wavelength conversion optical plate 3, the sunlight is extremely effectively used by supplying to the plant 7 through the reflecting prism 5 from the end part in the plane direction of the wavelength conversion optical plate 3.

Description

  The present invention relates to a plant production system that can be used in a plant factory for producing plants using light such as sunlight.

Conventionally, as a plant factory for artificially producing plants, a sunlight utilization type and a complete control type are known.
The former is an extension of house cultivation and has the advantage that vegetables can be produced at a relatively low cost using sunlight. In order to enhance the growth of plants, a technology that converts the wavelength of sunlight using a wavelength conversion optical plate and supplies light with a wavelength suitable for plant growth is proposed as this sunlight-based technology. (See Patent Documents 1 and 2).

  On the other hand, the latter uses artificial high-pressure Na lamps, fluorescent lamps, light-emitting diodes, etc. as light sources in order to provide a stable supply of agricultural products such as vegetables. In recent years, it is like a factory that grows vegetables. A plant factory is under construction.

  The feature of this fully controlled type is the annual production system of plants by controlling the environment such as light, temperature, carbon dioxide concentration, etc., which allows solar production in narrow land without being influenced by the weather, pesticide-free, fresh, clean, etc. A stable supply of value-added crops is possible, which is consistent with food safety, security and consumer health.

JP-A-63-160521 JP 2008-181771 A

  However, in the solar-powered type, countermeasures against high temperatures in summer are an issue, and in general, pesticide-free cultivation is not easy. For this reason, pesticides are used, but there are problems of air pollution around the use of pesticides and water pollution caused by mixing with rainwater. Furthermore, the recent increase in health consciousness has demanded organic farming without pesticides and rich taste.

  In particular, when a wavelength conversion optical plate is used, most of sunlight is reflected by the surface of the wavelength conversion optical plate and the like, and a sufficient amount of wavelength conversion light is not irradiated to the plant (for example, about 15% of sunlight). There was a problem that only can be used).

  On the other hand, in order to cultivate under the fully controlled type, a large amount of power is consumed, which incurs production costs, and there are concerns that it will have a significant impact on environmental and energy issues such as global warming and depletion of fossil fuels. Has been.

  Further, regarding the light source used, the high-pressure Na lamp has a high output and a low unit price per W, but there is a problem that proximity illumination cannot be performed due to a large amount of heat radiation. In addition, fluorescent lamps are inexpensive and easy to handle, but have few red components and have some difficulty in product quality. Furthermore, the light emitting diode has advantages such as long life and matching with the absorption spectrum of red and blue chlorophyll, but there is a problem that the lighting equipment is expensive.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to reduce energy, production cost, environmental load, etc. for producing plants, and sufficient light of a preferable wavelength can be obtained by plant growth. It is to provide a plant production system that can be supplied to.

  (1) The invention of claim 1 (plant production system) includes a wavelength conversion optical plate that converts the wavelength of light, and a reflection prism that is disposed outside an end portion in a planar direction of the wavelength conversion optical plate. The reflecting prism has a reflecting surface disposed so as to reflect light emitted from an end portion in the planar direction of the wavelength converting optical plate in the thickness direction of the wavelength converting optical plate, and the reflecting prism The arrangement | positioning place of a plant is set to the reflection direction of light, It is characterized by the above-mentioned.

  In the present invention, light (for example, sunlight) incident on the wavelength conversion optical plate is converted into a wavelength suitable for plant growth in the wavelength conversion optical plate. The converted light is repeatedly reflected and condensed in the wavelength conversion optical plate, and a large amount of light from the end in the plane direction (about 70% of the light incident from the thickness direction of the wavelength conversion optical plate). Is ejected. And the light inject | emitted from the edge part of the wavelength conversion optical plate injects into a reflective prism, is reflected by the reflective surface, and is irradiated to the plant side.

  Therefore, according to the present invention, energy for producing plants, production cost, environmental load, etc. can be reduced, and light with a preferable wavelength can be intensively and sufficiently supplied by plant growth. There is an effect.

  (2) In the invention of claim 2, the wavelength conversion optical plate transmits the light between an end in the planar direction of the wavelength conversion optical plate and a reflection surface of a reflection prism disposed outside the end. It is characterized by comprising a light transmission part that transmits in the thickness direction.

  In the present invention, since the light transmitting part is provided between the end of the wavelength converting optical plate and the reflecting surface of the reflecting prism, the light incident on the light transmitting part from the thickness direction of the wavelength converting optical plate is directly reflected by the light. The plant is irradiated through the transmission part.

  Therefore, it is considered that it is more preferable for the growth of plants because the plants are irradiated not only with the light whose wavelength is converted by the wavelength conversion optical plate but also with other wavelengths.

(3) The invention of claim 3 is characterized in that an illumination unit for irradiating light toward the plant is provided around the reflecting prism.
In this invention, since the illumination part which irradiates light to a plant by LED etc. is provided, for example, when the weather is bad and sunlight is not enough or at night, light can be supplied to a plant.

  (4) The invention of claim 4 (plant production system) includes a wavelength conversion optical plate that converts the wavelength of light, a reflection portion that is disposed at an end in the plane direction of the wavelength conversion optical plate and reflects light, The reflection unit is configured to reflect the light reaching the end in the planar direction of the wavelength conversion optical plate in the thickness direction of the wavelength conversion optical plate with respect to the planar direction of the wavelength conversion optical plate. It is arranged at an angle, and the arrangement location of the plant is set in the direction of light reflection by the reflecting portion.

  In the present invention, light (for example, sunlight) incident on the wavelength conversion optical plate is converted into a wavelength suitable for plant growth in the wavelength conversion optical plate. This converted light is repeatedly reflected and collected in the wavelength conversion optical plate, and a lot of light (that is, light incident from the thickness direction of the wavelength conversion optical plate) is reflected at the reflection portion at the end in the plane direction. About 70%) is reflected. And the light reflected in the plant side in the reflection part of the wavelength conversion optical plate is efficiently irradiated to the plant.

  Therefore, according to the present invention, energy for producing plants, production cost, environmental load, etc. can be reduced, and light with a preferable wavelength can be intensively and sufficiently supplied by plant growth. There is an effect.

  (5) In the invention of claim 5, an end portion of the wavelength conversion optical plate in the planar direction is cut obliquely with respect to the planar direction, and a reflective film constituting the reflective portion is formed on the oblique slope. It is characterized by being.

The present invention exemplifies the configuration of the reflecting portion.
In addition, as the inclination angle θ inclined obliquely (inclination angle with respect to the thickness direction perpendicular to the plane direction), for example, a range of 40 ° <θ <50 ° is preferable.

  (6) The invention of claim 6 (plant production system) includes a wavelength conversion optical plate that converts the wavelength of light and an optical fiber that guides the light, and one end of the optical fiber is formed of the wavelength conversion optical plate. In order to receive the light emitted from the end portion in the plane direction, the wavelength conversion optical plate is disposed outside the end portion in the plane direction, and a plant placement location is set on the other end side of the optical fiber. It is characterized by.

  In the present invention, light (for example, sunlight) incident on the wavelength conversion optical plate is converted into a wavelength suitable for plant growth in the wavelength conversion optical plate. The converted light is repeatedly reflected and condensed in the wavelength conversion optical plate, and a large amount of light from the end in the plane direction (that is, about 70% of the light incident from the thickness direction of the wavelength conversion optical plate). ) Is injected. And the light irradiated in the optical fiber from the edge part of the wavelength conversion optical plate is guided in the optical fiber, and is efficiently irradiated to the plant.

  Therefore, according to the present invention, energy for producing plants, production cost, environmental load, etc. can be reduced, and light with a preferable wavelength can be intensively and sufficiently supplied by plant growth. There is an effect.

(7) The invention according to claim 7 is characterized in that the wavelength conversion optical plate is a laminate of a plurality of wavelength conversion optical plates having different wavelength conversion characteristics.
The present invention exemplifies a wavelength conversion optical plate. Thereby, light of a plurality of wavelengths suitable for plant growth can be selectively extracted and supplied to the plant, which is more suitable for plant growth.

  (8) In the invention of claim 8, the wavelength conversion optical plate absorbs ultraviolet light having a wavelength of 300 nm to 400 nm and emits blue light having a wavelength of 400 nm to 500 nm; and 400 nm to 600 nm. And a red wavelength conversion optical plate that absorbs light having a wavelength of 600 nm and emits red light having a wavelength of 600 nm to 700 nm.

The present invention exemplifies a preferable configuration of the wavelength conversion optical plate.
As illustrated in FIG. 4, it is known that mainly light having a wavelength of 450 nm (for example, light from a blue LED) promotes germination, and light having a wavelength of 650 nm (for example, light from a red LED) is mainly used. It is known to promote photosynthesis, germination and flowering.

  Therefore, in the present invention, a blue wavelength conversion optical plate that emits blue light having a wavelength of 400 nm to 500 nm and a red wavelength conversion optical plate that emits red light having a wavelength of 600 nm to 700 nm are used so as to include these wavelengths. .

In particular, it is preferable to use a wavelength conversion optical plate obtained by laminating a blue wavelength conversion optical plate and a red wavelength conversion optical plate because photosynthesis, germination and flowering can be further promoted.
In addition, when the blue wavelength conversion optical plate and the red wavelength conversion optical plate are laminated and the blue wavelength conversion optical plate is disposed on the incident side of sunlight, the red wavelength conversion optical plate is attached to the blue wavelength conversion optical plate. Thus, the blue light that has been wavelength-converted can be efficiently converted into red light, and thus there is an advantage that sunlight can be used very effectively.

  (9) The invention according to claim 9 is provided with a configuration in which a plurality of the wavelength conversion optical plates are laminated in the thickness direction, and an area of the wavelength conversion optical plate on the light incident side is opposite to the light incident side. It is set to be larger than the area of the wavelength conversion optical plate.

  In the present invention, the area of the wavelength conversion optical plate on the light incident side is set larger than the area of the wavelength conversion optical plate on the side opposite to the light incident side (outgoing side). The light reflected on the end side can be directly supplied to the plant side without passing through the wavelength conversion optical plate on the emission side. Therefore, light can be supplied to the plant more efficiently.

(10) The invention of claim 10 is characterized in that a reflection film for reflecting light is provided on the surface of the wavelength conversion optical plate opposite to the light incident side.
In this invention, it can prevent supplying infrared rays to the plant side by reflecting the light (especially infrared rays) which entered from the incident side of the wavelength conversion optical plate with a reflecting film.

  Therefore, in this invention, since there is little thermal radiation with respect to a plant, a wavelength conversion optical board, a reflective prism, an optical fiber, etc. can be arrange | positioned close to a plant. Thereby, since much more light (namely, light suitable for plant growth) can be supplied, there exists a remarkable effect that a plant can be raised suitably.

  (11) In the invention of claim 11, a sealed container capable of introducing the light is disposed at a position where the light emitted from the wavelength conversion optical plate is guided, and the plant is placed in the sealed container. A belt conveyor to be placed and moved, a nutrient water circulation system for supplying nutrients to the plant, a shower for supplying moisture to the plant, a carbon dioxide system for supplying carbon dioxide to the plant, substances harmful to the growth of the plant, and / or Or at least 1 sort (s) of the clean air system which prevents invasion of living organisms was provided.

  In this invention, since a plant can be grown in an airtight container, invasion of a harmful substance or a living organism can be prevented, and thus a remarkable effect is achieved that a plant can be grown without any agricultural chemical. Moreover, there is an advantage that plants can be grown with a minimum volume.

  (12) In the invention of claim 12, further, among an automatic seeding device for seeding a culture bed of a plant placed on the belt conveyor, and a recovery device for collecting the plant placed on the belt conveyor And at least one kind.

  In the present invention, plant seeding and recovery can be performed using a belt conveyor, so that there is an advantage that the labor of plant production can be reduced. In addition, there is an effect that a large-scale building which is expensive as in the conventional case is unnecessary.

  In each of the above claims, as the wavelength conversion optical plate, for example, a transparent glass or resin in which a fluorescent substance (fluorescent dye) or the like is mixed as an impurity can be adopted. In this case, when light incident on the wavelength conversion optical plate hits a fluorescent material or the like, fluorescence having a specific wavelength is generated.

  In addition, the wavelength conversion optical plate is formed with a fluorescent material layer containing a fluorescent material that generates fluorescence in response to incident light on the surface (surface on the light incident side) of a substrate made of transparent glass or resin. You can adopt things. In this case, the fluorescence generated when the light hits the fluorescent material on the surface of the substrate enters the transparent substrate.

  The glass and resin are most preferably colorless and transparent, but may be colored. Further, as the glass, for example, silica or boron oxide glass can be employed, and as the resin, for example, acrylic or polycarbonate can be employed.

It is a front view which shows the plant production system of Example 1. FIG. It is a top view which shows the plant production system of Example 1. FIG. (A) The graph which shows the wavelength conversion characteristic of a blue wavelength conversion optical plate, (b) The graph which shows the wavelength conversion characteristic of a red wavelength conversion optical plate. It is a graph which shows the relationship between the wavelength of light and the growth of a plant. It is a front view which shows the plant production system of Example 2. FIG. It is a front view which shows the plant production system of Example 3. It is a front view which shows the plant production system of Example 4. It is a front view which shows the plant production system of Example 5. FIG. It is a front view which shows the plant production system of Example 6. FIG. It is a front view which shows the plant production system of Example 7. It is a front view which shows the plant production system of Example 8. It is explanatory drawing which shows the plane of the plant production system of Example 9. FIG. (A) It is explanatory drawing which shows the structure of another wavelength conversion optical plate, (b) It is explanatory drawing which shows the structure of another light conversion optical plate.

  Next, examples of the plant production system of the present invention will be described with some specific examples.

a) First, the configuration of the plant production system of this example will be described.
As shown in FIGS. 1 and 2, the plant production system 1 according to the present embodiment includes a plurality of wavelength conversion optical plates 3 having a rectangular planar shape, and a plurality of reflection prisms arranged in the plane direction of the wavelength conversion optical plate 3. 5 and a plant 7 disposed below the reflecting prism 5. The wavelength conversion optical plate 3 and the reflecting prism 5 constitute a flat plant growth panel 9.

Each configuration will be described below.
The wavelength conversion optical plate 3 is a light-transmitting flat plate having a length of 500 mm, a width of 1000 mm, and a thickness of 8 mm, for example, and its end face in the plane direction is formed perpendicular to the plane direction.

  Further, the wavelength conversion optical plate 3 includes a flat plate-like blue wavelength conversion optical plate 11 having a plate thickness of 4 mm and a flat plate-like red wavelength conversion optical plate 13 having a plate thickness of 4 mm for converting the wavelength of received sunlight. Are laminated together in a plate thickness direction and bonded together with a light-transmitting optical adhesive (for example, an optical silicon resin adhesive).

  Among these, the blue wavelength conversion optical plate 11 is a blue fluorescent plate that absorbs ultraviolet light having a wavelength of 300 nm to 400 nm and emits blue light having a wavelength of 400 nm to 500 nm. As the blue wavelength conversion optical plate 11, for example, Lumogen 570 manufactured by BASF can be adopted. The blue wavelength conversion optical plate 11 has characteristics as shown in FIG. In addition, the vertical axis | shaft of FIG. 3 has shown the value which normalized absorption and light emission intensity.

  The red wavelength conversion optical plate 13 is a red fluorescent plate that absorbs light having a wavelength of 400 nm to 600 nm and emits red light having a wavelength of 600 nm to 700 nm. As the red wavelength conversion optical plate 13, for example, Lumogen 305 manufactured by BASF can be adopted. The red wavelength conversion optical plate 13 has characteristics as shown in FIG.

Here, the reason for using the wavelength conversion optical plate 3 in which the blue wavelength conversion optical plate 11 and the red wavelength conversion optical plate 13 are laminated will be described.
As shown in FIG. 4, it is known that light having a wavelength of around 450 nm (for example, light of a blue LED) promotes germination, and light having a wavelength of about 650 nm (for example, light of a red LED) It is known to promote photosynthesis, germination and flowering.

  Therefore, in this embodiment, in order to generate light having a wavelength preferable for the growth of these plants 7, a blue wavelength conversion optical plate 11 that emits blue light having a wavelength of 400 nm to 500 nm and red light having a wavelength of 600 nm to 700 nm. The red wavelength conversion optical plate 13 that emits light is used in an overlapping manner.

In addition, the relative effect of the vertical axis | shaft of FIG. 4 has shown the value normalized with the intensity | strength of the spectrum of 660 nm.
As shown in FIGS. 1 and 2, the reflecting prism 5 has a cross section perpendicular to the longitudinal direction (left-right direction in FIG. 2) having a right triangle (short side 8 mm × long side (slope side) 11.3 mm). It is a prism. The reflecting prism 5 is made of, for example, transparent acrylic, and a reflecting film 15 is formed on the hypotenuse. The reflective film 15 is made of Al having a thickness of 100 nm and can be formed by sputtering or vapor deposition.

In particular, in this embodiment, the pair of reflecting prisms 5 are arranged in a space between the left and right wavelength conversion optical plates 3 so as to be symmetrical.
Specifically, in the space between the left and right wavelength conversion optical plates 3, the right end surface 17 in the plane direction of the left wavelength conversion optical plate 3 in FIG. 19 is in contact, and the end surface 21 on the other short side of the left reflecting prism 5L is aligned with the lower surface 23 of the wavelength conversion optical plate 3 (the end surface 21 is therefore lower in FIG. 1). It is arranged so as to face.

Thereby, the reflecting film 15 formed on the inclined surface 25 of the reflecting prism 5L is inclined by 45 ° with respect to the plane direction (left-right direction in FIG. 1).
Similarly, in the space between the left and right wavelength conversion optical plates 3, the left end surface 27 in the plane direction of the right wavelength conversion optical plate 3 in FIG. 1 is arranged on one short side of the right reflecting prism 5R. The end surface 29 abuts and the other short-side end surface 31 of the right-side reflecting prism 5R is aligned with the lower surface 23 of the wavelength conversion optical plate 3 (therefore, the end surface 31 is in FIG. 1). (Facing downwards).

Thereby, the reflecting film 15 formed on the inclined surface 33 of the reflecting prism 5R is inclined by 45 ° with respect to the planar direction (left-right direction in FIG. 1).
In the plant growing panel 9, a reflective film 37 made of aluminum is formed on the outer end face 35 of the wavelength conversion optical plate 13 disposed at the left and right ends thereof.

  And, immediately below the left and right reflecting prisms 5R and 5L of the plant growing panel 9, that is, in the thickness direction of the plant growing panel 9, on the exit side (downward in FIG. 1) opposite to the sunlight incident side, A plurality of plants 7 are arranged. The plant 7 is planted on a block-shaped culture bed 39 made of, for example, non-woven fabric, but the culture floor 39 is not provided and only the plant root may be used.

b) Next, functions of the plant production system 1 will be described.
In the present embodiment, sunlight is irradiated from above (the blue wavelength conversion optical plate 11 side) of the plant growing panel 9 at a predetermined angle close to the vertical with respect to the surface (upper surface) of the wavelength conversion optical plate 3. In addition, the incident angle of sunlight changes with how the plant growth panel 9 is arrange | positioned with respect to the ground.

  Of the wavelength conversion optical plate 3, most of the sunlight incident on the blue wavelength conversion optical plate 11 on the upper surface side is wavelength-converted by the blue wavelength conversion optical plate 11. Specifically, the wavelength of ultraviolet rays is mainly converted into blue light by the characteristics shown in FIG.

  This blue light repeats total reflection in the blue wavelength conversion optical plate 11 and is radiated to the reflecting prism 5 from the end in the plane direction of the blue wavelength conversion optical plate 11 as shown by the solid line in FIG. The blue light emitted from this end is reflected by the reflecting film 15 of the reflecting prism 5 and irradiated from the end faces 21 and 31 of the reflecting prism 5 toward the plant 7 below the figure.

  A part of the light, that is, the light that has been wavelength-converted by the blue wavelength conversion optical plate 11 and the light that has not been wavelength-converted pass through the blue wavelength conversion optical plate 11 in the thickness direction, The red wavelength conversion optical plate 13 is reached.

  Similarly, most of the sunlight that has entered the red wavelength conversion optical plate 13 on the lower surface side is wavelength-converted by the red wavelength conversion optical plate 13. Specifically, mainly green light is wavelength-converted into red light by the characteristics shown in FIG.

  The red light repeats total reflection in the red wavelength conversion optical plate 13 and is radiated from the end in the plane direction of the red wavelength conversion optical plate 13 to the reflection prism 5 as shown by the broken line in FIG. Similar to the blue light, the red light emitted from this end is reflected by the reflecting film 15 of the reflecting prism 5 and irradiated from the end surfaces 21 and 31 of the reflecting prism 5 toward the plant 7 below the figure. Is done.

  Part of the light, that is, light that has been wavelength-converted by the red wavelength conversion optical plate 13 and part of the light that has not been wavelength-converted, passes through the red wavelength conversion optical plate 13 in the thickness direction, and is converted to red wavelength Radiated from the lower surface side of the optical plate 13.

  Moreover, since the reflection film 37 is formed on the outer end face 35 of the wavelength conversion optical plates 3 at both the left and right ends of the plant growing panel 9, the light whose wavelength is converted by the wavelength conversion optical plate 3 is the end face 35. Without being leaked to the outside, it is emitted to the reflecting prism 5 side or the like.

  c) In this way, in this embodiment, the light whose wavelength has been converted by the wavelength conversion optical plate 3 is emitted from the end in the plane direction to the reflecting prism 5, and is further reflected on the lower surface by the reflecting film 15 of the reflecting prism 5. Since the plant 7 arranged on the side is irradiated, energy for producing the plant 7, production cost, environmental load, and the like can be greatly reduced.

  That is, about 70% of sunlight irradiated from the upper surface of the wavelength conversion optical plate 3 is collected on the end side in the planar direction of the wavelength conversion optical plate 3, so that the wavelength conversion optical plate as in this embodiment. 3 is advantageous in that sunlight can be used very efficiently by supplying light to the plant 7 through the reflecting prism 5 from the end in the plane direction of 3.

  Furthermore, in this embodiment, by laminating the blue wavelength conversion optical plate 11 and the red wavelength conversion optical plate 13, the light having the wavelength reaching each wavelength conversion optical plate 11, 13 is suitable for the growth of the plant. Can change to light of wavelength. In particular, since the red wavelength conversion optical plate 13 can efficiently convert the blue light wavelength-converted by the blue wavelength conversion optical plate 11 into red light, there is an advantage that sunlight can be used very effectively.

  That is, in the present embodiment, the light having a preferable wavelength can be sufficiently supplied by the growth of the plant 7, so that the remarkable effect that the plant 7 can be efficiently grown is produced.

Next, Example 2 will be described, but description of the same contents as Example 1 will be omitted.
As shown in FIG. 5, the plant production system 41 of the present embodiment has a plurality of wavelength conversion optics (in which a blue wavelength conversion optical plate 43 and a red wavelength conversion optical plate 45 are stacked), as in the first embodiment. A plant growing panel 51 comprising a plate 47 and a plurality of pairs of reflecting prisms 49 disposed between the left and right wavelength conversion optical plates 47 is provided. A plant 53 is provided on the lower surface side (lower side of the figure) of the reflecting prism 49. Is arranged.

  In addition, a reflection film 55 is formed on the slopes of the left and right reflection prisms 49L and 49R, and a reflection film 57 is also formed on the outer end face of the wavelength conversion optical plate 43 disposed on the left and right sides. .

  In particular, in this embodiment, the reflecting prism 49 has a trapezoidal shape in which a rectangle and a right triangle are integrated with each other in a cross section perpendicular to the longitudinal direction. The reflective film 55 is formed on the slope of the right triangle portion 59, but no reflective film is formed on the upper and lower surfaces of the rectangular portion 61. Therefore, light that has entered the rectangular portion 61 of the reflecting prism 49 from above passes through the rectangular portion 61 and is emitted from the lower surface side of the rectangular portion 61.

  Therefore, in this embodiment, as in the first embodiment, most of the sunlight incident on the blue wavelength conversion optical plate 43 on the upper surface side is wavelength-converted by the blue wavelength conversion optical plate 41, and also on the lower surface side. Most of the sunlight incident on the red wavelength conversion optical plate 45 is wavelength-converted by the red wavelength conversion optical plate 45.

  Then, the light collected by the blue wavelength conversion optical plate 43 and the light collected by the red wavelength conversion optical plate 45 are respectively emitted from the end in the planar direction to the reflection prism 49 side, and the reflection film of the reflection prism 49 Reflected at 55 and irradiated to the plant 53 side.

  Moreover, among the sunlight irradiated from above the plant growing panel 51, the sunlight irradiated to the rectangular portion 61 of the reflecting prism 49 passes through the transparent rectangular portion 61 as described above, and is directly transmitted to the plant 53. To be supplied.

  Thus, in this embodiment, the same effects as those of the first embodiment are obtained, and the reflection prism 49 includes the rectangular portion 61 through which sunlight is transmitted as it is, so that light of many wavelengths is supplied to the plant 53. be able to. Therefore, it is estimated that it is more preferable for the growth of the plant 53.

Next, Example 3 will be described, but description of the same contents as Example 2 will be omitted.
As shown in FIG. 6, the plant production system 71 of the present embodiment has a plurality of wavelength conversion optics (a blue wavelength conversion optical plate 73 and a red wavelength conversion optical plate 75 are laminated), as in the second embodiment. A plant growing panel 81 including a plate 77 and a plurality of pairs of reflecting prisms 79 disposed between the left and right wavelength conversion optical plates 77 is provided, and a plant 83 is disposed on the lower surface side of the reflecting prism 79. .

  Similarly to the second embodiment, the left and right reflecting prisms 79L and 79R have a trapezoidal shape, the reflecting film 85 is formed on the inclined surface thereof, and the outside of the wavelength conversion optical plate 77 disposed on the left and right sides. A reflection film 87 is also formed on the end surface of the first electrode.

  In particular, in this embodiment, since the reflective film 89 that reflects the same light as described above is formed on the lower surface of the wavelength conversion optical plate 77, that is, the lower surface of the red wavelength conversion optical plate 75, the red wavelength conversion optics. The light is prevented from being irradiated to the plant 83 side from the lower surface of the plate 75.

  Accordingly, in this embodiment, the same effects as those of the second embodiment are obtained, and light incident on the wavelength conversion optical plate 77 is efficiently leaked without leaking from the lower surface of the red wavelength conversion optical plate 75. Therefore, there is an advantage that sunlight can be used effectively.

  In particular, in this embodiment, since the reflective film 87 is formed on the lower surface of the red wavelength conversion optical plate 75, infrared rays are transmitted in the thickness direction of the wavelength conversion optical plate 77 and irradiated to the plant 83. Since it can be prevented, heat radiation to the plant can be reduced. Therefore, since the plant growing panel 81 can be disposed close to the plant 83, there is a remarkable effect that the plant can be preferably grown.

Next, although Example 4 is demonstrated, description of the content similar to Example 1 is abbreviate | omitted.
As shown in FIG. 7, in the plant production system 91 of this embodiment, a plurality of wavelength conversion optical plates 97 (laminated with a blue wavelength conversion optical plate 93 and a red wavelength conversion optical plate 95) are formed on the paper surface of FIG. Plant growth panels 101 arranged in parallel along the thickness direction are used.

And the plant 103 is arrange | positioned at the lower surface side (lower side of the figure) of the edge part in the planar direction of the wavelength conversion optical plate 97.
In particular, in this embodiment, the end in the planar direction of the wavelength conversion optical plate 97, and hence the end in the planar direction of the blue wavelength conversion optical plate 93 and the red wavelength conversion optical plate 95 are oblique to the planar direction (for example, 45 °), and a reflective film 105 is formed on the oblique end face.

  Therefore, in this embodiment, the light incident from above the wavelength conversion optical plate 97 is condensed by the blue wavelength conversion optical plate 93 and the red wavelength conversion optical plate 95, and is reflected by the reflection surface 105 at each end. Reflected and irradiated to the plant 103 side.

  Therefore, this embodiment also has the advantage that the configuration can be simplified because the same effects as those of the first embodiment can be obtained and the reflecting prism is not used.

Next, although Example 5 is demonstrated, description of the content similar to Example 4 is abbreviate | omitted.
As shown in FIG. 8, in the plant production system 111 of the present embodiment, a plurality of wavelength conversion optical plates 117 (laminated with a blue wavelength conversion optical plate 113 and a red wavelength conversion optical plate 115) are formed on the paper surface of FIG. Plant growth panels 121 arranged in parallel in the thickness direction are used.

And the plant 123 is arrange | positioned at the lower surface side (lower side of the figure) of the edge part in the plane direction of the wavelength conversion optical plate 117.
Further, the end portions of the blue wavelength conversion optical plate 113 and the red wavelength conversion optical plate 115 in the planar direction are cut obliquely (for example, 45 °) with respect to the planar direction, Reflective films 125 and 127 are formed.

  In particular, in the present embodiment, the width of the blue wavelength conversion optical plate 113 (the horizontal direction in the figure) is set larger than the width of the red wavelength conversion optical plate 115. Specifically, the reflection film 125 of the blue wavelength conversion optical plate 113 and the reflection film 127 of the red wavelength conversion optical plate 115 are set so as not to overlap each other in the vertical direction.

  Therefore, in this embodiment, the light incident from above the blue wavelength conversion optical plate 113 is collected by the blue wavelength conversion optical plate 113, reflected by the reflection surface 125 at the end thereof, and irradiated to the plant 123 side. Is done. On the other hand, the light incident on and condensed by the red wavelength conversion optical plate 115 is reflected by the reflection surface 127 at the end portion and irradiated to the plant 123 side.

  Therefore, in this embodiment, the same effect as in the fourth embodiment is obtained, and the light collected by the blue wavelength conversion optical plate 113 and reflected by the reflection film 125 is directly supplied to the plant 123, so that the plant There is an advantage that light can be supplied to 123 more efficiently.

Next, although Example 6 is demonstrated, description of the content similar to Example 1 is abbreviate | omitted.
As shown in FIG. 9, in the plant production system 131 of this embodiment, a wavelength conversion optical plate 135 in which a blue wavelength conversion optical plate 133 and a red wavelength conversion optical plate 134 are stacked is used as the plant growth panel 132. Yes.

In addition, a reflection film 136 that reflects light is formed at one end of the wavelength conversion optical plate 135 in the planar direction.
In particular, in this embodiment, the other end of the wavelength conversion optical plate 135 in the planar direction, that is, the other end of the blue wavelength conversion optical plate 133 in the planar direction and the other end of the red wavelength conversion optical plate 134 in the planar direction are respectively optical fibers. One ends of 137 and 138 are arranged. A plant 139 is disposed at the other end of the optical fibers 137 and 138.

  Therefore, in this embodiment, the light incident from above the blue wavelength conversion optical plate 133 is collected by the blue wavelength conversion optical plate 133 and emitted from the end portion into the optical fiber 137, and the other end of the optical fiber 137. To the plant 139. Similarly, the light incident on and condensed on the red wavelength conversion optical plate 134 is emitted from the end portion thereof into the optical fiber 138 and is irradiated to the plant 139 from the other end of the optical fiber 138.

  Therefore, in this embodiment, the same effects as in the first embodiment can be obtained, and the directions of the optical fibers 137 and 138 can be freely changed. Therefore, there are advantages that the degree of freedom of the structure of the plant production system 131 is high.

Next, although Example 7 is demonstrated, description of the content similar to Example 3 is abbreviate | omitted.
As shown in FIG. 10, the plant production system 141 of the present embodiment has a plurality of wavelength conversion optics (a blue wavelength conversion optical plate 143 and a red wavelength conversion optical plate 145 are laminated) as in the third embodiment. A plant growing panel 151 including a plurality of pairs of reflective prisms 149 disposed between the plate 147 and the left and right wavelength conversion optical plates 147 is provided.

  The left and right reflecting prisms 149L and 149R have a trapezoidal shape as in the third embodiment, and the reflecting film 155 is formed on the inclined surfaces thereof. In addition, a reflective film 157 is formed on the outer end surfaces of the left and right outer wavelength conversion optical plates 147, and a reflection film 159 is also formed on the lower surface of the wavelength conversion optical plate 147.

  In particular, in this embodiment, a space is provided between the left and right reflecting prisms 149L and 149R, and an illumination 161 made of, for example, an LED for irradiating the plant 153 with light is disposed in this space.

  As this illumination, as shown in the said FIG. 4, both or one of blue LED which irradiates the light of about 450 nm, red LED which irradiates the light of about 650 nm, etc. can be used. Moreover, as arrangement | positioning of blue LED and red LED, the method of arranging in the left-right direction of FIG. 10, the method of arrange | positioning alternately in the thickness direction of the paper surface of FIG. 10, etc. are employable.

  Therefore, in this embodiment, the same effects as in the third embodiment are provided, and the illumination 161 is provided, so that there is an advantage that the plant 153 can be stably grown even when there is little sunlight.

Next, although Example 8 will be described, description of the same contents as Example 7 will be omitted.
As shown in FIG. 11, the plant production system 171 of the present embodiment is similar to the seventh embodiment in that a plurality of wavelength conversion optics (a blue wavelength conversion optical plate 173 and a red wavelength conversion optical plate 175 are laminated). A plant growth panel 181 comprising a plate 177 and a plurality of pairs of reflective prisms 179 disposed between the left and right wavelength conversion optical plates 177 is provided.

  The left and right reflecting prisms 179L and 179R are also trapezoidal like the seventh embodiment, and the reflecting film 183 is formed on the slope. Further, a reflection film 185 is formed on the outer end faces of the left and right outer wavelength conversion optical plates 177, and a reflection film 187 is also formed on the lower surface of the wavelength conversion optical plate 177. Further, an illumination 191 is disposed between the left and right reflecting prisms 179L and 179R.

In particular, in this embodiment, a transparent sealed container 193 capable of receiving light from the upper surface side (extending in the thickness direction of the paper surface in the drawing) is disposed on the lower surface side of the reflecting prism 179.
The sealed container 193 is supplied with nutrient water 195, a pad 199 on which the plant 197 is placed, a belt conveyor 201 on which the pad 199 is placed and moved in the thickness direction of the paper surface, and a shower 203 that supplies moisture. Is provided.

  In addition, although not shown in the figure, this sealed container 193 has a well-known circulation system such as a pump for circulating the nutrient water 195, a carbon dioxide gas system for supplying carbon dioxide, substances harmful to the growth of plants (insects, plants, etc. A clean air system that prevents the invasion of living organisms is provided.

  In this example, the same effect as in Example 7 can be obtained, and since the plant 197 grows in the sealed container 193, it is possible to prevent the invasion of harmful substances and organisms, and therefore, the plant can be grown without any agricultural chemicals. There is a remarkable effect of being able to. Moreover, there is an advantage that plants can be grown with a minimum volume.

Next, although Example 9 is demonstrated, description of the content similar to Example 8 is abbreviate | omitted.
As shown in FIG. 12, the plant production system 211 of this example is similar to the eighth example in that a plant growing panel 217 (a plant growing panel of another example) provided with a wavelength conversion optical plate 213 and a reflecting prism 215 is used. Alternatively, a plurality of first belt conveyors 219 extending in the left-right direction in FIG. 12 are provided in parallel on the lower surface side (the back side of the paper surface in FIG. 12) of the reflecting prism 215.

  A plurality of trays 311 are arranged in a row on the upper surface of the first belt conveyor 219 (the front side of the paper surface in FIG. 12), and a plurality of (for example, three) plants 313 are placed on each tray 311. Is placed.

  Moreover, the 2nd belt conveyor 315 which is extended in the up-down direction of the figure at the edge part (left end of FIG. 12) of the plant growth panel 217 is provided. The second belt conveyor 315 is aligned with the first belt conveyor 219 so that the tray 311 conveyed by the first belt conveyor 219 can be received. ) It is arranged vertically.

  Further, an automatic seeding device 317 for seeding a culture bed (not shown) of a plant 313 placed on the second belt conveyor 315 is disposed above the second belt conveyor 315 (the front side of the paper surface in FIG. 12). And a recovery device 319 for recovering the plant 313 placed on the second belt conveyor 315.

  Although not shown, the plant production system 211 includes a control device for controlling the operations of the first and second belt conveyors 219 and 315, the automatic seeding device 317, the recovery device 319, and the like.

  Therefore, in this embodiment, the tray 311 on which the plant 313 (or the culture bed seeded by the automatic seeding device 317) transported upward by the second belt conveyor 315 is placed, for example, by a robot By transferring to the first belt conveyor 219 by an arm or the like and transporting it to the right side of the figure by the first belt conveyor 219, it can be arranged at a position to receive light irradiation.

  Further, when the plant 313 is sufficiently grown, the tray 311 conveyed to the left side of the figure by the first belt conveyor 219 is transferred to the second belt conveyor 315, and the second belt conveyor 315 is used to The plant 313 can be collected by being conveyed upward and collected by the collection device 319 (for example, by an arm of a robot).

  In the present embodiment, the same effects as in the eighth embodiment can be obtained, and seeding and recovery of the plant 313 can be performed using the first and second belt conveyors 219, 315 and the like. There is an advantage that it can be reduced.

In addition, there is an effect that a large-scale building which is expensive as in the conventional case is unnecessary.
In addition, although the Example of this invention was described above, this invention is not limited to said specific Example, It can implement with a various form besides this within the scope of the present invention.

(1) As the wavelength conversion optical plate, a layer having a function of wavelength conversion may be formed on the surface of a transparent substrate having no function of wavelength conversion.
Specifically, as shown in FIG. 13A, for example, as a wavelength conversion optical plate 411, a blue wavelength conversion layer 415 made of an inorganic semiconductor cluster is provided on the surface of a first substrate 413 made of, for example, transparent acrylic or glass. Similarly, the formed blue wavelength conversion optical plate 417 and a red wavelength conversion optical plate 423 in which a red wavelength conversion layer 421 made of an inorganic semiconductor cluster is formed on the surface of a second substrate 419 made of transparent acrylic or glass, for example. Laminated layers can be used.

  In addition, as an inorganic semiconductor cluster constituting the blue wavelength conversion layer 415 that converts the wavelength of light from 300 nm to 400 nm into blue light having a wavelength of 400 nm to 500 nm, ZnSe (Er dope), CdSe (Er dope), etc. Can be adopted.

  Moreover, as an inorganic semiconductor cluster which comprises the red wavelength conversion layer 421 which wavelength-converts the light of the wavelength of 400 nm to 600 nm into the red light of the wavelength of 600 nm to 700 nm, ZnSe (Mn dope), CdSe (Mn dope), etc. Can be adopted.

  (2) Also, for example, as shown in FIG. 13B, as another wavelength conversion optical plate 431, a laminate comprising a blue wavelength conversion optical plate 433 and a red wavelength conversion optical plate 435 similar to those of the first embodiment, for example. What formed the wavelength conversion layer 439 which consists of an inorganic semiconductor cluster in the surface of 437 can be used.

  In addition, ZnSe (Er, Mn dope), CdSe (Er, Mn dope), etc. are employable as an inorganic semiconductor cluster which comprises the said wavelength conversion layer 439. FIG. The wavelength conversion layer 439 can convert light having a wavelength of 300 nm to 400 nm into light having a wavelength of 400 nm to 700 nm.

  (3) For example, light other than sunlight can be used.

1, 41, 71, 91, 111, 131, 141, 171, 121 ... Plant production system 3, 47, 77, 97, 117, 135, 147, 177, 213, 411, 431 ... Wavelength conversion optical plate 5, 5L 5R, 49, 49L, 49R, 79, 79L, 79R, 149, 149L149R, 179, 179L, 179R, 215 ... reflective prism 7, 53, 83, 103, 123, 139, 153, 197, 313 ... plant 9, 51, 81, 101, 121, 132, 151, 181, 217 ... Plant growth panels 11, 43, 73, 93, 113, 133, 143, 173, 417, 433 ... Blue wavelength conversion optical plates 13, 45, 75, 95, 115, 134, 145, 175, 423, 435 ... Red wavelength conversion optical plate 15, 37, 55, 57, 85, 8 7, 89, 105, 125, 127, 136, 15
5, 157, 159, 183, 185, 187 ... reflective film 137, 138 ... optical fiber 193 ... sealed container

Claims (12)

A wavelength conversion optical plate for converting the wavelength of light, and a reflection prism disposed outside the end in the planar direction of the wavelength conversion optical plate,
The reflection prism has a reflection surface disposed so as to reflect light emitted from an end portion in the planar direction of the wavelength conversion optical plate in the thickness direction of the wavelength conversion optical plate, and light from the reflection prism. A plant production system, wherein the plant placement location is set in the reflection direction.   A light transmission portion that transmits the light in the thickness direction of the wavelength conversion optical plate between an end portion in the plane direction of the wavelength conversion optical plate and a reflection surface of a reflection prism disposed outside the end portion. The plant production system according to claim 1, comprising:   The plant production system according to claim 1, wherein an illumination unit that irradiates light toward the plant is provided around the reflection prism. A wavelength conversion optical plate that converts the wavelength of light, and a reflection portion that is disposed at an end in the planar direction of the wavelength conversion optical plate and reflects light,
The reflection portion is disposed obliquely with respect to the planar direction of the wavelength conversion optical plate so as to reflect light reaching the end in the planar direction of the wavelength conversion optical plate in the thickness direction of the wavelength conversion optical plate. In addition, a plant production system is characterized in that an arrangement location of the plant is set in a direction in which light is reflected by the reflecting portion.   The end in the planar direction of the wavelength conversion optical plate is cut obliquely with respect to the planar direction, and a reflective film constituting the reflective portion is formed on the oblique slope. 4. The plant production system according to 4. A wavelength conversion optical plate for converting the wavelength of light, and an optical fiber for guiding the light,
One end of the optical fiber is disposed outside the end in the planar direction of the wavelength conversion optical plate so as to receive light emitted from the end in the planar direction of the wavelength conversion optical plate, and A plant production system characterized in that a plant location is set on the other end side.   The plant production system according to any one of claims 1 to 6, wherein the wavelength conversion optical plate is a laminate of a plurality of wavelength conversion optical plates having different wavelength conversion characteristics.   The wavelength conversion optical plate absorbs ultraviolet light having a wavelength of 300 nm to 400 nm and emits blue light having a wavelength of 400 nm to 500 nm; absorbs light having a wavelength of 400 nm to 600 nm; The plant production system according to any one of claims 1 to 7, comprising at least one of red wavelength conversion optical plates that emit red light having a wavelength of 700 nm.   A structure in which a plurality of the wavelength conversion optical plates are stacked in the plate thickness direction, and the area of the wavelength conversion optical plate on the light incident side is set larger than the area of the wavelength conversion optical plate on the opposite side to the light incident side. The plant production system according to claim 7 or 8, wherein   The plant production system according to any one of claims 1 to 9, wherein a reflection film that reflects light is provided on a surface opposite to the light incident side of the wavelength conversion optical plate. While arranging a sealed container capable of introducing the light at a position where the light emitted from the wavelength conversion optical plate is guided,
A belt conveyor for placing and moving the plant in the sealed container, a nutrient water circulation system for supplying nutrients to the plant, a shower for supplying moisture to the plant, a carbon dioxide gas system for supplying carbon dioxide to the plant, The plant production system according to any one of claims 1 to 10, comprising at least one of a clean air system that prevents invasion of substances and / or organisms harmful to plant growth.   Furthermore, at least 1 sort was provided among the automatic seeding apparatus which seeds with respect to the culture bed of the plant mounted on the said belt conveyor, and the collection | recovery apparatus which collect | recovers the plant mounted on the said belt conveyor. The plant production system according to claim 11.