WO2022181733A1 - Système de culture de plantes - Google Patents

Système de culture de plantes Download PDF

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Publication number
WO2022181733A1
WO2022181733A1 PCT/JP2022/007757 JP2022007757W WO2022181733A1 WO 2022181733 A1 WO2022181733 A1 WO 2022181733A1 JP 2022007757 W JP2022007757 W JP 2022007757W WO 2022181733 A1 WO2022181733 A1 WO 2022181733A1
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WO
WIPO (PCT)
Prior art keywords
wavelength conversion
light
plant cultivation
film
cultivation system
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PCT/JP2022/007757
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English (en)
Japanese (ja)
Inventor
年孝 中村
徹 杉谷
和也 藤岡
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日東電工株式会社
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Publication of WO2022181733A1 publication Critical patent/WO2022181733A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/20—Forcing-frames; Lights, i.e. glass panels covering the forcing-frames

Definitions

  • the present invention relates to a plant cultivation system.
  • Patent Documents 1 to 3 describe techniques for promoting the growth of plants using light.
  • An LED device dedicated to plant factories that focuses on wavelengths suitable for promoting plant growth.
  • an LED device for lighting designed so that the chlorophyll present in plants can efficiently absorb the light necessary for photosynthesis. are on sale.
  • Such a dedicated LED device has its emission spectrum optimized in advance so as to increase the proportion of red wavelength components in the emitted light compared to a general LED device.
  • LED devices for lighting dedicated to plant factories cannot be adjusted. I had to change the type.
  • dedicated LED devices are very expensive compared to general LED devices.
  • toning LED device that can adjust the emission spectrum within a certain range. .
  • LED devices are more expensive and are not widely adopted in general plant factories.
  • Patent Document 3 discloses a light-emitting diode for plant cultivation detachably covered with a fluorescent member molded from a translucent base material containing a blue phosphor and a red phosphor. According to this light-emitting diode, it is possible to change the peak wavelength of light to a desired one without replacing the entire light source. , requires attachment and detachment to and from each light-emitting diode. Therefore, even if this light-emitting diode is used, the work is very troublesome as in the case of the wavelength conversion film.
  • a fluorescent net irradiated with sunlight emits red fluorescence. That is, the fluorescent emitting material converts the wavelength of light by absorbing the energy of sunlight and emitting fluorescent light of a different color than the incident light.
  • the fluorescent emitting material converts the wavelength of light by absorbing the energy of sunlight and emitting fluorescent light of a different color than the incident light.
  • Patent Document 2 discloses a plant cultivation unit that promotes the growth of plants by increasing the amount of light that hits the plants by using a material with high light reflectance for the plant cultivation table on which the plant support for planting plants is placed. Although disclosed, there is no disclosure of the use of emission spectra suitable for growing plants.
  • the present invention has been made in view of the above circumstances, and an object thereof is to provide a plant cultivation system that facilitates operations associated with using a light source with an emission spectrum suitable for growing plants. .
  • a plant cultivation system is characterized by the following (1) to (12).
  • a plant cultivation system including a cultivation unit main body defining a cultivation space for cultivating plants and a lighting device having a light source main body, a light guide mechanism that is connected to the lighting device and guides light emitted from the light source main body into the cultivation space; a wavelength conversion mechanism disposed between the light source main body and the light incident end of the light guide mechanism for absorbing incident light and emitting wavelength-converted light;
  • a plant cultivation system comprising:
  • the light guide mechanism has a light guide plate arranged such that at least a main part of the light exit surface faces the cultivation space;
  • the wavelength conversion mechanism is arranged at a position adjacent to the incident side end face of the light guide plate, The plant cultivation system according to (1) above.
  • the wavelength conversion mechanism includes a wavelength conversion film having a planar shape formed in accordance with the shape and size of the light incident end of the light guide mechanism.
  • the wavelength conversion mechanism includes a film support mechanism that detachably supports the wavelength conversion film at a predetermined position adjacent to the light incident end of the light guide mechanism.
  • a wavelength conversion device comprising a light-transmitting flat plate having the same shape and size as the wavelength conversion film and the wavelength conversion film superimposed on each other,
  • the film support mechanism has a groove engageable with at least one of both side edges in the width direction of the wavelength conversion device, and moves the wavelength conversion device along the longitudinal direction intersecting the width direction. and a guide member that allows at least one of movement along the width direction,
  • the plant cultivation system according to (4) above.
  • a rectangular frame having the same shape and size as the wavelength conversion film and having an opening at a portion other than the peripheral edge of the wavelength conversion film is superimposed on the wavelength conversion film, and the peripheral edge of the wavelength conversion film is the rectangular frame. Equipped with a wavelength conversion device fixed to a frame, The film support mechanism has a groove that can be engaged with at least one of both side edges in the width direction of the rectangular frame of the wavelength conversion device, and the length direction of the wavelength conversion device intersects with the width direction.
  • a guide member that allows at least one of movement along and movement along the width direction, The plant cultivation system according to (4) above.
  • the film support mechanism includes an engaging member capable of engaging and fixing one longitudinal end of the wavelength conversion film formed in a ribbon shape to a predetermined portion, and a longitudinal direction of the wavelength conversion film. a tensioning member that applies longitudinal tension to the other end of the The plant cultivation system according to (4) above.
  • the light guide mechanism includes one or more optical fibers having one end disposed within the cultivation space and the other end disposed outside the cultivation space;
  • the wavelength conversion mechanism is arranged at a position adjacent to the incident side end face of the optical fiber, and has a wavelength conversion film having a planar shape and size equivalent to the shape and size of the incident side end face of the optical fiber,
  • the plant cultivation system according to (1) above.
  • the wavelength conversion mechanism includes a wavelength conversion film containing an inorganic phosphor.
  • the wavelength conversion mechanism includes multiple types of wavelength conversion films connected to each other.
  • the plant cultivation system according to any one of (1) to (9) above.
  • (11) comprising a film switching mechanism that switchably holds the plurality of types of wavelength conversion films;
  • the cultivation unit main body includes a plurality of the cultivation spaces and an air conditioning unit; the air conditioning unit controls at least one of temperature and humidity in the plurality of cultivation spaces;
  • the plant cultivation system according to any one of (1) to (11) above.
  • the wavelength conversion mechanism used to obtain light having an emission spectrum suitable for growing plants is arranged between the light source main body and the light incident end of the light guide mechanism. Therefore, the wavelength can be switched by operating this wavelength conversion mechanism. Therefore, for example, work such as attaching and detaching the fluorescent members to and from the individual light source bodies becomes unnecessary, and it becomes easy for a worker or the like who manages the cultivation apparatus to switch the configuration and characteristics of the wavelength conversion mechanism. Furthermore, since the wavelength conversion mechanism is arranged between the light source main body and the light incident end of the light guide mechanism, the cross-sectional area of the optical path required for the wavelength conversion mechanism is reduced, and the area of the wavelength conversion film, etc. is reduced. become smaller. Therefore, the component cost of the wavelength conversion mechanism can be reduced.
  • the plant cultivation system having the configuration (2) above by increasing the area of the light emitting surface of the light guide plate, a sufficient amount of light necessary for growing plants is emitted over a wide area in the cultivation space. It becomes possible to Moreover, since the wavelength conversion mechanism is arranged at a position adjacent to the incident side end surface of the light guide plate, the cross-sectional area of the optical path required for the wavelength conversion mechanism is reduced, and the area of the wavelength conversion film and the like is reduced. Therefore, the component cost of the wavelength conversion mechanism can be reduced.
  • the plant cultivation system having the configuration (3) above it is easy to attach and detach the wavelength conversion film as needed, and by switching the type of the wavelength conversion film, there is a difference in the type of plant and a change in the growth situation. This facilitates the operation of changing the emission spectrum in accordance with .
  • the wavelength conversion film has a planar shape formed in accordance with the shape and size of the light incident end of the light guide mechanism, the required area is reduced and the cost of parts is reduced. can be reduced, and replacement work becomes easier.
  • the plant cultivation system having the configuration (5) above it is possible to easily attach and detach the wavelength conversion device.
  • the emission spectrum can be changed by a simple operation of attaching and detaching and replacing them by the operator.
  • the plant cultivation system having the configuration (6) above it is possible to easily attach and detach the wavelength conversion device.
  • the emission spectrum can be changed by a simple operation of attaching and detaching and replacing them by the operator.
  • the wavelength conversion film can be arranged at a predetermined portion and fixed while maintaining a predetermined planar shape, or can be easily removed and replaced. Therefore, if a plurality of types of wavelength conversion films having different characteristics are prepared in advance, the emission spectrum can be changed by a simple operation of removing and exchanging them by the operator.
  • the plant cultivation system having the configuration of (8) above, by arranging the one end side of the optical fiber at a predetermined position in the cultivation space, a sufficient concentration of the plant can be obtained in a location in the cultivation space where the plant is present. It becomes easy to irradiate bright light.
  • the wavelength conversion film has a planar shape equivalent to the shape and size of the incident side end surface of the optical fiber, the area is reduced, and the cost of parts can be reduced.
  • the area of the wavelength conversion film is small, the attaching/detaching operation is facilitated.
  • the wavelength conversion film performs wavelength conversion using an inorganic phosphor, so the durability against irradiation light is greatly improved compared to the case where an organic dye is used. Therefore, even when the wavelength conversion film is arranged near the light source main body, deterioration of characteristics is unlikely to occur over a long period of time.
  • the wavelength conversion mechanism includes a plurality of types of wavelength conversion films connected to each other. By changing the type of conversion film, it is possible to switch to a desired emission color.
  • the plant cultivation system having the configuration (11) above since it includes a film switching mechanism that switchably holds a plurality of types of wavelength conversion films, the plurality of types of wavelength conversion films can be automatically switched to obtain a desired emission color. automatically switched.
  • the air conditioning unit and the plurality of cultivation spaces are connected to form a closed system, and air is not exchanged with the outside.
  • the amount of cultivation can be increased while easily maintaining the air environment.
  • the plant cultivation system of the present invention it is possible to facilitate the work associated with using a light source with an emission spectrum suitable for growing plants.
  • FIG. 1 is a vertical cross-sectional view showing the internal structure of the main parts of the plant cultivation system according to the embodiment of the present invention.
  • 2(a) is a longitudinal sectional view showing the main part of the lighting device
  • FIG. 2(b) is a perspective view showing the main part of the lighting device
  • FIG. 2(c) is a perspective view showing the vicinity of the light source main body of the lighting device.
  • 3(a) and 3(b) are an exploded perspective view and a longitudinal sectional view, respectively, showing Configuration Example-1 of the wavelength conversion mechanism.
  • 4(a) and 4(b) are an exploded perspective view and a vertical cross-sectional view, respectively, showing Configuration Example-2 of the wavelength conversion mechanism.
  • FIG. 5(a) and 5(b) are a plan view and a longitudinal sectional view, respectively, showing a structure for supporting the wavelength conversion film in Configuration Example-3 of the wavelength conversion mechanism.
  • FIG. 6 is a plan view showing a structure in which a plurality of types of wavelength conversion films are switched by a reel winding method in Configuration Example-4 of the wavelength conversion mechanism.
  • FIG. 7 is a diagram showing an example of automatic switching of a plurality of types of wavelength conversion films in the configuration example of the wavelength conversion mechanism shown in FIG.
  • FIG. 8 is a diagram showing an example in which two types of wavelength conversion films are overlapped and used in the configuration example-4 of the wavelength conversion mechanism shown in FIG. FIG.
  • FIG. 9 is a vertical cross-sectional view showing a structure in which a plurality of types of wavelength conversion films are switched by a slide method in Configuration Example-5 of the wavelength conversion mechanism.
  • FIG. 10 is a plan view showing a structure in which a plurality of types of wavelength conversion films are switched by a belt system in Configuration Example-6 of the wavelength conversion mechanism.
  • FIG. 11(a) is a plan view showing the main part of the illumination device in Configuration Example-7
  • FIG. 11(b) is a front view showing an example of the appearance of the wavelength conversion mechanism.
  • FIG. 12 is a graph showing an example of characteristic curves of the wavelength conversion film in the embodiment.
  • FIG. 13 is a longitudinal sectional view showing an outline of a plant cultivation system in another embodiment of the invention.
  • FIG. 14 is a longitudinal sectional view showing an outline of a plant cultivation system in another embodiment of the invention.
  • FIG. 15 is a graph showing examples of spectra before and after insertion of the wavelength conversion film.
  • FIG. 1 shows the internal structure of the main part of the plant cultivation system 10 according to the embodiment of the present invention.
  • the plant cultivation system 10 shown in FIG. 1 can be used, for example, by installing it indoors in a building and using it as a cultivation apparatus such as a plant factory.
  • a plurality of plant cultivation systems 10 having the same structure are prepared and arranged in layers in the vertical direction, or as described later with reference to FIG.
  • the cultivation room 11 is formed in a rectangular parallelepiped shape, for example, and a closed space 12 is formed inside. That is, air circulation is blocked inside and outside the cultivation room 11 so that the environment in the closed space 12 can be maintained in a state different from the outside air. Therefore, the bottom surface, side wall surfaces, ceiling surface, and the like of the cultivation chamber 11 are surrounded by a material having a certain degree of heat insulation and airtightness, and are isolated from the outside space.
  • the cultivation room 11 may be an open space.
  • a plant cultivation system 10A in which the cultivation room 11 is an open space will be described later with reference to FIG. 13 .
  • a cultivation container 13 is installed inside the closed space 12 , and a plant 14 is cultivated in this cultivation container 13 .
  • an air conditioner 15 is installed inside the enclosed space 12 to enable temperature control within the enclosed space 12 .
  • a moisture permeable membrane 16 is installed at the boundary between the inside and outside of the cultivation room 11 .
  • This moisture-permeable film 16 blocks air circulation, but has a dehumidifying function for expelling the moisture inside to the outside by utilizing the humidity gradient between the inside and the outside.
  • a blower 17 is also installed in the closed space 12 .
  • the method for dehumidifying the closed space 12 is not limited to the moisture permeable membrane 16 and the air blower 17 .
  • a lighting device 20 capable of irradiating the light necessary for growing the plants 14 is arranged above the plants 14 .
  • the light source main body 21 of the lighting device 20 is arranged outside the cultivation room 11 , and the wide surface of the thin light guide plate 22 optically connected to the light source main body 21 is positioned near the ceiling of the closed space 12 . are placed. That is, the light emitted from the light source main body 21 is incident on one side end 22a (edge, incident side end face) of the light guide plate 22, propagates while repeating reflection inside the light guide plate 22, and reaches the bottom of the light guide plate 22. The light is emitted downward while diffusing from the surface 22b, and the plant 14 is irradiated with the light.
  • the light source body 21 is an LED (light emitting diode) device that emits white, blue, or ultraviolet light.
  • a wavelength conversion mechanism 23 is installed between them. Further, as will be described later, the wavelength conversion mechanism 23 of this embodiment is configured to be easily detachable and replaceable so that spectrum adjustment can be performed as required.
  • a carbon dioxide supply facility 30 is installed near the light source main body 21 .
  • This carbon dioxide supply facility 30 includes an adsorbent 31 , a pipe 32 , an electromagnetic valve 33 , a pipe 34 and an electromagnetic valve 35 .
  • the adsorbent 31 can adsorb only carbon dioxide (CO 2 ) from the supplied air when the temperature is low.
  • the adsorbent 31 can release the adsorbed carbon dioxide when the temperature is high.
  • waste heat from the light source main body 21 is used to control the adsorption/desorption operation of carbon dioxide in the adsorbent 31 .
  • the solenoid valve 35 the carbon dioxide released by the adsorbent 31 can be introduced into the closed space 12 via the pipe 34 .
  • the carbon dioxide supply equipment 30 supplies the amount of carbon dioxide that is consumed by photosynthesis during the growth of the plant 14, thereby maintaining the carbon dioxide concentration in the closed space 12 in a state suitable for the growth of the plant 14. be able to.
  • the method of supplying carbon dioxide is not limited to the method using the carbon dioxide supply equipment 30, and for example, a cylinder storing carbon dioxide may be used.
  • the carbon dioxide supply facility 30 can supply carbon dioxide extracted from the atmosphere using the adsorbent 31, so there is no need to prepare a large facility such as a cylinder.
  • FIGS. 2(a) to 2(c) A configuration example of the illumination device 20 is shown in FIGS. 2(a) to 2(c).
  • 2(a) and 2(b) show the main part of the lighting device 20, and
  • FIG. 2(c) shows the vicinity of the light source main body 21 in the lighting device 20.
  • a thin plate-like circuit board 25 is fixed substantially in the center of the opening of the heat sink 26 , and the light source main body 21 is installed on this circuit board 25 .
  • the circuit board 25 is an electrically insulating substrate on which a circuit pattern is formed.
  • the actual light source main body 21 is composed of a large number of LED elements arranged in a line on a circuit board 25 as shown in FIG. 2(c). Each LED element can emit blue, ultraviolet, or white light in the X-axis direction.
  • the light guide plate 22 is sandwiched between heat sinks 26 at its upper and lower sides with its side end portion 22a facing the light emitting surface of the light source main body 21 with a gap therebetween. Fixed.
  • the light guide plate 22 has a uniform thickness in the Z-axis direction over its entirety, and the dimension d1 in the thickness direction is, for example, several mm to 30 mm.
  • a heat sink 26 supports the wavelength conversion mechanism 23, which is elongated in a ribbon shape, so as to be slidable in the Y-axis direction through guide grooves 26a and 26b. Therefore, the operator can insert the wavelength conversion mechanism 23 from the front side of the heat sink 26 along the guide grooves 26a and 26b to attach it, or remove the wavelength conversion mechanism 23 by pulling it out from the front side.
  • the wavelength conversion mechanism 23 can be easily attached and detached without opening the closed space 12.
  • the effective thickness dimension d2 is equivalent to the side end portion 22a of the light guide plate 22.
  • the distance L1 between the side end portion 22a of the light guide plate 22 and the wavelength conversion mechanism 23 can be changed as required, as long as an appropriate air layer can be formed in this portion.
  • the surface of the wavelength conversion mechanism 23, the surface of the side end portion 22a of the light guide plate 22, and the light exit surface of the light source main body 21 are arranged substantially parallel.
  • a distance L2 between the wavelength conversion mechanism 23 and the light emitting surface of the light source main body 21 is appropriately determined so that the intensity of incident light in the wavelength conversion mechanism 23 does not become too large. That is, if the intensity of incident light in the wavelength conversion mechanism 23 becomes excessive, the material of the wavelength conversion mechanism 23 is likely to deteriorate. is desirable.
  • FIGS. 3(a) and 3(b) Configuration Example-1 of the wavelength conversion mechanism 23 is shown in FIGS. 3(a) and 3(b).
  • FIG. 3(a) shows an exploded state
  • FIG. 3(b) shows a cross-sectional structure.
  • the wavelength conversion mechanism 23 shown in FIGS. 3(a) and 3(b) includes a ribbon-like (elongated shape) wavelength conversion film 23a and an elongated rectangular support frame 23b in the thickness direction (A3 direction). , and attached in the vicinity of the four sides of the outline of the shape of the support frame 23b, that is, at the portion of the frame.
  • the thickness of the wavelength conversion film 23a is, for example, about 100 [ ⁇ m].
  • the area of the wavelength conversion film 23a is, for example, five times or less the light emitting area of the light source main body 21 .
  • the support frame 23b is formed in a thin flat plate shape using a material such as resin having a certain degree of rigidity, and an opening 23c is formed except for the portion of the frame (periphery). Therefore, light can pass through the support frame 23b at the location of the opening 23c (the central portion other than the peripheral portion). Moreover, since the support frame 23b has rigidity, the wavelength conversion film 23a integrated with the support frame 23b can be supported so as to always maintain its planar shape without bending.
  • the wavelength conversion mechanism 23 shown in FIGS. 3(a) and 3(b) can always maintain a planar shape, it can be used as a solid wavelength conversion device that is easy to handle.
  • an operator holds one end in the longitudinal direction (A1 direction) of the wavelength conversion mechanism 23 by hand and guides it from the front side of the Y-axis shown in FIGS. It is easy to insert the wavelength conversion mechanism 23 into the grooves 26a and 26b in the longitudinal direction and pull it out toward the front.
  • the intervals L1 and L2 shown in FIG. 2(a) can always be maintained in a proper state.
  • the wavelength conversion mechanism 23 may be slid in the width direction (longitudinal direction) to attach and detach from the heat sink 26 .
  • a slit is provided to open the bottom of the guide groove 26a in the upper wall of the heat sink 26 shown in FIGS.
  • the operator grips one end of the wavelength conversion mechanism 23 in the width direction (direction A2) and pulls the guide groove from the slit located above the Z axis shown in FIGS.
  • the wavelength conversion mechanism 23 is inserted downward or pulled upward along the width direction at the location 26b. Even when the wavelength conversion mechanism 23 is moved along the vertical direction in this way, the attachment/detachment work can be easily performed.
  • FIGS. 4(a) and 4(b) Configuration Example-2 of the wavelength conversion mechanism 23 is shown in FIGS. 4(a) and 4(b).
  • FIG. 4(a) shows an exploded state
  • FIG. 4(b) shows a cross-sectional structure.
  • the wavelength conversion mechanism 23A shown in FIGS. 4(a) and 4(b) has a ribbon-like elongated wavelength conversion film 23a and an elongated rectangular thin acrylic plate 23d in the thickness direction (A3 direction). are stacked on top of each other, and the stacked opposing surfaces are attached to each other to be integrated.
  • the thickness of the wavelength conversion film 23a is, for example, about 100 [ ⁇ m].
  • the wavelength conversion film 23a and the acrylic plate 23d do not necessarily need to be adhered together to form a single body. and may be superimposed on each other.
  • the acrylic plate 23d is colorless and transparent and transmits light, the light incident on the surface can be directly guided to the opposing surface of the wavelength conversion film 23a. Moreover, since the acrylic plate 23d has a certain degree of rigidity, the wavelength conversion film 23a can be supported so as to always maintain its planar shape.
  • the wavelength conversion mechanism 23A shown in FIGS. 4(a) and 4(b) can also be used as an easy-to-handle solid wavelength conversion device.
  • an operator holds one end in the longitudinal direction (A1 direction) of the wavelength conversion mechanism 23A by hand and guides it from the front side of the Y-axis shown in FIGS. It is easy to insert the wavelength conversion mechanism 23A into the grooves 26a and 26b in the longitudinal direction and pull it out toward the front.
  • the intervals L1 and L2 shown in FIG. 2(a) can always be maintained in a proper state.
  • the wavelength conversion mechanism 23A may be slid in the width direction (longitudinal direction) to attach and detach from the heat sink 26.
  • a slit is provided to open the bottom of the guide groove 26a in the upper wall of the heat sink 26 shown in FIGS.
  • the operator grips one end of the wavelength conversion mechanism 23A in the width direction (direction A2) and pulls the guide groove from the slit located above the Z axis shown in FIGS.
  • the wavelength conversion mechanism 23A is inserted downward or pulled upward along the width direction at the location 26b. Even when the wavelength conversion mechanism 23A is moved along the vertical direction in this way, the attachment/detachment work can be easily performed.
  • FIG. 5(a) shows the structure for supporting the wavelength conversion film 23B in the configuration example-3 of the wavelength conversion mechanism 23, and FIG. 5(b) shows the cross-sectional structure.
  • a single ribbon-shaped wavelength conversion film 23B is used as the wavelength conversion mechanism 23 as it is.
  • the wavelength conversion film 23B has a small thickness and is easily bent as it is, it is necessary to devise ways to maintain the planar shape in order to use it as the wavelength conversion mechanism 23 .
  • Projections 53 and 54 are formed on the film guide members 51 and 52, respectively.
  • the elastic member may be attached to only one of the two film guide members 51 and 52.
  • one end of the wavelength conversion film 23B may be fixed to the heat sink 26B via a spring or the like so that longitudinal tension is generated.
  • a winding mechanism such as a tape measure, may be connected to one end of the wavelength conversion film 23B to apply tension.
  • the heat sink 26B is formed with an opening 26c at the top. Accordingly, the operator holds both ends of the wavelength conversion film 23B by hand, inserts the entire wavelength conversion film 23B from above into the space inside the heat sink 26B, and arranges and fixes the wavelength conversion film 23B at a predetermined position. be able to.
  • the engagement terminals 55 and 56 can be removed from the projections 53 and 54, and the wavelength conversion film 23B can be removed by lifting the wavelength conversion film 23B upward.
  • this single wavelength conversion film 23B is shown in FIG. 2(a). It can be attached and detached by inserting and pulling out along the guide grooves 26a and 26b.
  • FIGS. 6 to 8 show a structure in which a plurality of types of wavelength conversion films 23g1, 23g2, 23g3, and 23g4 included in the wavelength conversion mechanism 23B1 are switched by a reel winding method.
  • the single ribbon-shaped wavelength conversion film 23B is used as the wavelength conversion mechanism 23 as it is.
  • the wavelength conversion mechanism 23B1 shown in FIG. 6 has a plurality of types of wavelength conversion films 23g1, 23g2, 23g3, and 23g4 containing different types of phosphors, as shown in FIG.
  • the wavelength conversion mechanism 23B1 includes, for example, ribbon-like wavelength conversion films 23g1, 23g2, 23g3, and 23g4 that are adjusted to absorb light from a blue LED and emit light in pink, red, orange, and yellow, respectively. They are connected to each other in the longitudinal direction (Y-axis direction) with a colorless film containing no body interposed therebetween.
  • a plurality of types of wavelength conversion films 23g1, 23g2, 23g3, and 23g4 may be connected to each other without sandwiching a colorless film.
  • the wavelength conversion mechanism 23B1 is used while wound on the reel 71A.
  • the wavelength conversion mechanism 23B1 is inserted in the Z-axis direction into the opening 26c (see FIG. 5B) of the heat sink 26B by an operator with one end pulled out from the reel 71A.
  • One end of the wavelength conversion mechanism 23B1 is wound around the reel 71B.
  • the wavelength conversion mechanism 23B1 is tensioned by holding portions 73A and 73B via film guide members 72A and 72B provided in the vicinity of both ends of the heat sink 26B in the Y-axis direction, respectively, so that the plane shape is maintained without bending.
  • the holding portions 73A and 73B are arranged near the film guide members 72A and 72B, respectively, and adjust the rotation direction, rotation speed, and rotation amount of the reels 71A and 71B according to instructions from a control device (not shown), for example.
  • the wavelength conversion mechanism 23B1 rotates the reels 71A and 71B according to instructions from the control device, and positions the desired wavelength conversion films 23g1, 23g2, 23g3, and 23g4 between the light source body 21 and the light guide plate 22. , can be automatically switched to the desired emission color.
  • two wavelength conversion mechanisms 23B1 wound around two reels 71 are prepared, and as shown in FIG. may be used.
  • FIG. 8 by adding a set of film guide members 72A, 72B and holding portions 73A, 73B in FIG. can be done.
  • FIG. 9 shows a structure in which a plurality of types of wavelength conversion films 23g5, 23g6, 23g7, and 23g8 included in the wavelength conversion mechanism 23B2 are switched by a sliding method.
  • a wavelength conversion mechanism 23B2 shown in FIG. 9 has a plurality of types of wavelength conversion films 23g5, 23g6, 23g7, and 23g8 with mutually different colors.
  • the wavelength conversion mechanism 23B2 is formed by ribbon-shaped wavelength conversion films 23g1, 23g2, 23g3, and 23g4 formed in, for example, colorless, pink, blue, and yellow, and connected to each other in the lateral direction (Z-axis direction). be.
  • the wavelength conversion mechanism 23B2 is inserted into the heat sink 26C so as to be slidable in the vertical direction (Z direction).
  • the heat sink 26C has openings formed in the upper and lower portions thereof, and a pair of driving rollers 75, 75 and a pair of driving rollers 76, 76 are provided in each opening.
  • the wavelength conversion mechanism 23B2 is inserted into the opening of the heat sink 26C, and tension is applied by driving rollers 75, 75 and 76, 76 between the light source main body 21 and the light guide plate 22, so that the wavelength conversion mechanism 23B2 is formed into a planar shape without bending. is maintained.
  • the driving rollers 75, 75 and 76, 76 are adjusted in rotation direction, rotation speed, and rotation amount, for example, according to instructions from a control device (not shown).
  • drive rollers 75, 75 and 76, 76 rotate according to instructions from the control device, and desired wavelength conversion films 23g5, 23g6, 23g7, 23g8 are formed between the light source main body 21 and the light guide plate 22. By positioning the , it is possible to automatically switch to the desired emission color. Either one of the driving rollers 75, 75 may be driven while the other rotates freely, or either one of the driving rollers 76, 76 may be driven while the other rotates freely. Further, when the wavelength conversion mechanism 23B2 is formed of a material and a size that are hard to bend and easy to maintain the planar shape, one of the driving rollers 75, 75 and 76, 76 is driven, and the rest are free. May rotate.
  • the wavelength conversion mechanism 23B2 shown in FIG. 9 by preparing two wavelength conversion mechanisms 23B2, two types of wavelength conversion films may be overlapped and used. Further, for example, the emission color may be adjusted by adjusting the position in the Z direction between the light source body 21 and the light guide plate 22 of the connecting portion of the two types of wavelength conversion films 23g6 and 23g7.
  • FIG. 10 shows a structure in which a plurality of types of wavelength conversion films 23g10, 23g11, 23g12, 23g13, 23g14, and 23g15 included in the wavelength conversion mechanism 23B3 are switched by a belt type.
  • the wavelength conversion mechanism 23B3 shown in FIG. 10 has multiple types of wavelength conversion films 23g10, 23g11, 23g12, 23g13, 23g14, and 23g15 of mutually different colors.
  • the ribbon-shaped wavelength conversion films 23g10, 23g11, 23g12, 23g13, and 23g14 are adjusted so as to emit green, red, pink, blue, and yellow light, for example, in the lateral direction (Z-axis direction). are connected to each other.
  • a wavelength conversion film 23g10 and a wavelength conversion film 23g14 are connected by a colorless wavelength conversion film 23g15 to form an endless belt.
  • the wavelength conversion mechanism 23B3 is inserted in the Y direction through the upper and lower openings of the heat sink 26C, and tension is applied between the light source main body 21 and the light guide plate 22 by drive rollers 75, 75 and 76, 76. , the planar shape is maintained without bending. As described above, the driving rollers 75, 75 and 76, 76 are adjusted in rotation direction, rotation speed, and rotation amount according to instructions from a control device (not shown), for example.
  • a film guide member may be provided at the edge of the heat sink 26C, for example.
  • wavelength conversion mechanism 23B3 In the wavelength conversion mechanism 23B3, drive rollers 75, 75 and 76, 76 rotate according to instructions from the control device, and desired wavelength conversion films 23g10, 23g11, 23g12, 23g13 are formed between the light source main body 21 and the light guide plate 22. , 23g14 and 23g15 can be automatically switched to a desired emission color. Further, for example, the emission color may be adjusted by adjusting the position in the Z direction between the light source body 21 and the light guide plate 22 of the connecting portion of the two types of wavelength conversion films 23g12 and 23g13.
  • FIG. 11(a) shows the main part of the illumination device 20B in configuration example-7
  • FIG. 11(b) shows an example of the appearance of the wavelength conversion mechanism.
  • the illumination device 20B shown in FIG. 11(a) includes a large number of optical fibers 61 as a light guiding mechanism for guiding the light from each LED element of the light source body 21 into the closed space 12. That is, the ends of the optical fibers 61 on the light incident side are individually arranged at positions facing each of the large number of LED elements of the light source main body 21 .
  • a wavelength conversion mechanism 23C is arranged between each optical fiber 61 and the light source main body 21 .
  • this wavelength conversion mechanism 23C is composed of an acrylic plate 23f and a large number of wavelength conversion films 23e attached on the surface thereof.
  • Each wavelength conversion film 23 e is formed according to the position, shape and size of the light emitting surface of each LED element of the light source body 21 and the position, shape and size of the light incident end of each optical fiber 61 . Therefore, each wavelength conversion film 23e has a very small area. Thereby, the component cost of the wavelength conversion mechanism 23C can be effectively reduced.
  • each wavelength conversion film 23e is formed in a shape close to a circle. It may be appropriately determined according to the shape and size of the light incident end. It is also possible to bundle optical fibers and apply a wavelength conversion film to guide the wavelength-converted light through the optical fibers.
  • FIG. 12 shows an example of the characteristic curve of the wavelength conversion film in this embodiment.
  • the horizontal axis represents the wavelength of light [nm]
  • the vertical axis represents the light radiation intensity [mW/m 2 ] for each wavelength.
  • each film has a thickness of 100 [ ⁇ m].
  • Each of these films also has dispersed inorganic phosphors having desired emission properties to provide wavelength conversion functionality. As shown in FIG. 2(a), the wavelength conversion mechanism 23 is exposed to a high-intensity light environment in the vicinity of the light source body 21 for a long period of time. High durability against light is required. Therefore, it is desirable to use inorganic phosphors for each film rather than using less durable organic dyes.
  • a wavelength conversion film that can be used for the wavelength conversion mechanism 23 can be configured by selecting any one of the above three types of films or by combining a plurality of them.
  • the following seven types of wavelength conversion films (1) to (7) were constructed, and the characteristics of each of these films were measured. The results are shown in FIG. 7 as characteristic curves C1-C7. (1) yellow only (2) orange only (3) red only (4) red + yellow combination (5) yellow + red combination (6) yellow + orange combination (7) orange + yellow combination
  • the seven types of wavelength conversion films (1) to (7) above have characteristic curves C1 to C7 different from each other as shown in FIG. It can absorb energy of short wavelength components and emit light of relatively long wavelengths (generally red) with different spectra.
  • the wavelength conversion mechanism 23 is arranged between the light source main body 21 and the light incident end of the wavelength conversion mechanism 23. Therefore, by operating this wavelength conversion mechanism 23, the wavelength can be switched. Therefore, for example, work such as attaching and detaching the fluorescent member to and from each light source body is not required, and it becomes easy for a worker or the like who manages the cultivation apparatus to switch the configuration and characteristics of the wavelength conversion mechanism 23 . Moreover, since the light source main body 21 of the lighting device 20 is arranged outside the cultivation room 11 , it is possible to prevent the heat generation of the light source main body 21 from affecting the temperature inside the closed space 12 .
  • the energy required for temperature control when operating a cultivation apparatus such as a plant factory can be greatly reduced.
  • the wavelength conversion mechanism 23 it is not necessary to mount a plurality of LED chips on the light source main body 21 to provide a color-tuning function, so a relatively inexpensive LED lamp can be employed.
  • the wavelength conversion mechanism 23 when the wavelength conversion mechanism 23 is arranged in a state facing the side end portion 22a of the light guide plate 22, the side end portion 22a and the light source main body 21 are separated from each other. Since the area of the portion facing is small, the area required for the wavelength conversion film 23a of the wavelength conversion mechanism 23 is extremely small, and a ribbon-like wavelength conversion film with low component cost can be adopted.
  • the wavelength conversion mechanism 23 is also arranged outside the cultivation room 11, it becomes easier for the operator to attach/detach and replace the wavelength conversion mechanism 23. That is, since there is no need to open the closed space 12, the wavelength conversion mechanism 23 can be easily replaced without adversely affecting the environment within the closed space 12. Moreover, since the wavelength conversion mechanism 23 itself is small, the replacement work is easy. Therefore, it becomes easy to adjust the spectrum of the light given to the plant according to the difference in the variety of each plant and the difference in the growing season. Moreover, the heat generated in the wavelength conversion film 23a along with the wavelength conversion can be discharged to the outside as it is.
  • the distribution of light emitted from the light guide plate 22 into the closed space 12 is less likely to be uneven in illuminance. That is, compared with the distribution of light emitted from the light source main body 21 composed of a large number of LED elements, the light generated by the phosphor on the wavelength conversion film has a more uniform intensity distribution.
  • ⁇ Plant Cultivation System with Open Cultivation Room> 13 mainly differs from the plant cultivation system 10 shown in FIG. 1 in that the cultivation chamber 11A is an open space 12A.
  • 10 A of plant cultivation systems are equipped with the cultivation shelf 40 which consists of several shelves which comprise 11 A of cultivation rooms, and one or several cultivation racks 40 are arrange
  • Identical or equivalent members to those shown in FIG. 1 are denoted by identical or similar reference numerals, and overlapping descriptions are omitted.
  • the cultivation shelf 40 has a plurality of vertically arranged shelf plates 41 and a plurality of support plates 42 that support the sides of each shelf plate 41 .
  • a cultivation container 13 is fixed to each shelf board 41 except for the uppermost shelf, and a plant 14 is cultivated in the cultivation container 13 .
  • FIG. 8 shows the cultivation shelf 40 having a three-stage configuration, the number of stages of the cultivation shelf 40 is not limited to three, and may be one, two, or four or more.
  • two light guide plates 22 are arranged so as to face each other, and a lighting device 20 incorporating a wavelength conversion mechanism 23 is attached to each end of the two light guide plates 22. ing.
  • the lighting device 20 is attached to the support plate 42 inside the cultivation room 11A.
  • two light guide plates 22 are arranged facing each other in the same manner as in the uppermost stage, and the lighting devices 20 at the respective ends of the two light guide plates 22 are arranged outside the cultivation room 11A on the support plate 42. It is attached.
  • the lighting devices 20 attached to the left and right light guide plates 22 are attached to the left and right support plates 42 outside the cultivation room 11A, respectively.
  • the illumination device 20 attached to the central light guide plate 22 is arranged above the plant 14 and fixed to, for example, the lower surface of the shelf plate 41 directly above.
  • the same effect as the plant cultivation system 10 can be obtained in the plant cultivation system 10A in which the cultivation chamber 11A has the open space 12A. Since the wavelength conversion mechanism 23 is arranged between the light source main body 21 and the light incident end of the wavelength conversion mechanism 23, the wavelength can be switched by operating the wavelength conversion mechanism 23. FIG. Therefore, it becomes easy for an operator or the like who manages the cultivation apparatus to switch the configuration and characteristics of the wavelength conversion mechanism 23 .
  • FIG. 13 shows an example in which the arrangement of the light guide plate 22 and the lighting device 20 is different for each of the upper, middle, and lower cultivation chambers 11A of the cultivation shelf 40, but the arrangement of the light guide plate 22 and the lighting device 20 is It is not limited to the illustrated one.
  • the arrangement of the light guide plate 22 and the lighting device 20 is appropriately determined according to the number of plants 14 arranged in the cultivation container 13, workability, and the like.
  • FIG. 13 shows an example in which two or three light guide plates 22 are continuously arranged in the left-right direction
  • the number of light guide plates 22 is not limited to these, and the size of the cultivation room 11A, etc. determined as appropriate.
  • the plant cultivation system 10A shown in FIG. 13 shows an example in which the cultivation rack 40 is arranged inside the building 1, the cultivation rack 40 is not necessarily installed inside the building 1 where air circulation is blocked inside and outside. It does not have to be placed.
  • the cultivation shelf 40 may be arranged inside a greenhouse or the like, or may be arranged outdoors.
  • a plant cultivation system 10B shown in FIG. 14 includes four cultivation chambers 11B, air conditioning units 48, and air conditioning pipes 49.
  • Each cultivation room 11B has a configuration similar to that of the cultivation room 11 shown in FIG.
  • Each cultivation room 11B is connected to each other by an air conditioning pipe 49 and to an air conditioning unit 48 .
  • the air conditioning unit 48 has an air conditioner 15B for temperature and humidity control, a moisture permeable membrane 16B, and an air blower 17B for circulating temperature and humidity controlled air.
  • the air conditioning unit 48 is closed with no exchange of air with the outside air.
  • each cultivation room 11B The temperature and humidity of each cultivation room 11B are controlled by circulating the air whose temperature and humidity are controlled by the air conditioning unit 48 in the air conditioning pipe 49 and in the closed space 12 inside each cultivation room 11B using the blower 17B. .
  • the air-conditioning unit 48, the air-conditioning pipe 49, and each cultivation room 11B are connected to each other to form a closed system, and there is no exchange of air with the outside.
  • the air conditioning unit 48 and the air conditioning piping 49 are also made of heat insulating material and isolated from the outside space. With this configuration, a plurality of cultivation chambers 11B can be air-conditioned with a single air conditioner and moisture-permeable membrane. It is possible to increase the cultivation amount while easily maintaining the air environment by avoiding rising.
  • FIG. 9 shows an example in which four cultivation chambers 11B are connected in the Y direction.
  • the performance of the air conditioner, the dehumidifying membrane, and the blower can be appropriately selected according to the capacity required for air conditioning.
  • This solution was applied on a PET film having a thickness of 188 ⁇ m with an applicator and air-dried to prepare a wavelength conversion film having a PVB resin layer with a red phosphor dispersed therein and a thickness of about 100 ⁇ m.
  • This wavelength conversion film was cut into a piece having a width of 9 mm and a length of 40 cm to obtain a ribbon-like wavelength conversion film.
  • a blue LED bar was prepared by mounting 88 surface-mounted blue LEDs (product number “67-21S/NB3C-D4555B4L12835Z15/2T” manufactured by Cree) on a mounting substrate having a width of 9 mm and a length of 288 mm.
  • This blue LED bar was attached to an aluminum frame (manufactured by MISUMI Co., Ltd., 20 mm square, single groove, groove width 6 mm) as a heat sink with a heat-conducting double-sided tape to obtain an LED light source.
  • the light guide plate is used by inserting the light entrance part (width 300 mm, thickness 8 mm) of a light guide plate (manufactured by Delplus Co., Ltd.) of size 300 ⁇ 600 ⁇ 8 mm into the groove (opening 8 mm) of the aluminum frame. An LED light source unit was obtained.
  • a characteristic curve Cb indicates the spectrum of blue light from the LED (before the wavelength conversion film is inserted), and a characteristic curve Cr indicates the spectrum after the wavelength conversion film is inserted. As described above, it was confirmed that the blue light emitted from the LED can be easily converted into the red light suitable for plant growth by using a very simple and small-area wavelength conversion film.
  • a plant cultivation system including a cultivation unit body (cultivation chamber 11) defining a cultivation space (closed space 12) for cultivating plants, and a lighting device (20) having a light source body (21) ) and a light guide mechanism (light guide plate 22 or optical fiber 61) that is connected to the lighting device and guides the light emitted from the light source main body into the cultivation space; a wavelength conversion mechanism (23, 23B1, 23B2, 23B3) arranged between the light source main body and the light incident end of the light guide mechanism for absorbing incident light and emitting wavelength-converted light;
  • a plant cultivation system comprising:
  • the light guide mechanism has a light guide plate (22) arranged such that at least a main portion of the light exit surface faces the cultivation space,
  • the wavelength conversion mechanism is arranged at a position adjacent to the incident side end face (22a) of the light guide plate,
  • the plant cultivation system according to [1] above.
  • the wavelength conversion mechanism (23) includes wavelength conversion films (23a, 23e) having a planar shape formed in accordance with the shape and size of the light incident end of the light guide mechanism, The plant cultivation system according to the above [1] or [2].
  • the wavelength conversion mechanism (23) includes a film support mechanism (guide grooves 26a and 26b, a support frame) that detachably supports the wavelength conversion film at a predetermined position adjacent to the light incident end of the light guide mechanism. 23b, or acrylic plates 23d, 23f), The plant cultivation system according to [3] above.
  • a wavelength conversion device constructed by overlapping a translucent flat plate (acrylic plate 23d) having the same shape and size as the wavelength conversion film and the wavelength conversion film.
  • the film support mechanism has grooves (guide grooves 26a and 26b) that can be engaged with at least one of both side edges in the width direction of the wavelength conversion device, and the width direction and the width direction of the wavelength conversion device.
  • a guide member heat sink 26 that allows at least one of movement along the intersecting longitudinal direction and movement along the width direction, The plant cultivation system according to [4] above.
  • the film support mechanism has grooves (guide grooves 26a, 26b) that can be engaged with at least one of both side edges in the width direction of the rectangular frame of the wavelength conversion device, and the wavelength conversion device,
  • a guide member (heat sink 26) that allows at least one of movement along the longitudinal direction intersecting the width direction and movement along the width direction,
  • the film supporting mechanism includes engaging members (engaging terminals 55, 56), and tension imparting members (film guide members 51 and 52) that apply tension in the longitudinal direction to the other end of the wavelength conversion film in the longitudinal direction.
  • engaging members engaging terminals 55, 56
  • tension imparting members film guide members 51 and 52
  • the light guide mechanism includes one or more optical fibers (61) having one end arranged inside the cultivation space and the other end arranged outside the cultivation space,
  • the wavelength conversion mechanism (23C) has a wavelength conversion film (23e) arranged adjacent to the incident side end face of the optical fiber and having a planar shape equivalent to the shape and size of the incident side end face of the optical fiber.
  • the wavelength conversion mechanism includes a wavelength conversion film containing an inorganic phosphor.
  • the plant cultivation system according to any one of [1] to [8] above.
  • the wavelength conversion mechanism (23B1, 23B2, 23B3) includes a plurality of types of wavelength conversion films connected to each other.
  • the plant cultivation system according to any one of [1] to [9] above.
  • a film switching mechanism (film guide members 72A, 72B, holding portions 73A, 73B, drive rollers 75, 75 and 76, 76) that switchably holds the plurality of types of wavelength conversion films,
  • the plant cultivation system according to [10] above.
  • the cultivation unit main body (the plurality of cultivation chambers 11B, the air conditioning units 48, the air conditioning pipes 49) includes a plurality of the cultivation spaces (closed spaces 12) and an air conditioning unit (48), the air conditioning unit controls at least one of temperature and humidity in the plurality of cultivation spaces;
  • the plant cultivation system according to any one of [1] to [11] above.
  • Japanese Patent Application Laid-Open No. 2011-200204 discloses a plant-growing lighting device that uses a human sensor to switch to red lighting during plant cultivation and white lighting during work.
  • this plant-growing lighting device requires a red light-emitting diode, and a control unit for switching between the white light-emitting diode and the red light-emitting diode, which increases the cost. Become.
  • the plant cultivation systems 10 and 10A have a wavelength conversion mechanism, the light is converted into white light when observing the growth state of the plant with a camera or visually, and is converted into red light during cultivation. It can be suitably used for the purpose.
  • the indoor illumination light can be easily converted into a desired color.
  • the plant cultivation system of the present invention can be used, for example, to cultivate plants in an artificially adjusted closed space.
  • Reference Signs List 10 10A, 10B Plant cultivation system 11, 11B Cultivation chamber 12 Closed space 13 Cultivation container 14 Plant 15, 15B Air conditioner 16, 16B Moisture permeable membrane 17, 17B Blower 20
  • Lighting device 21 Light source body 22

Abstract

Système de culture de plantes (10) comprenant un corps d'unité de culture (11) qui définit un espace de culture (12) pour cultiver des plantes, et un dispositif d'éclairage (20) ayant un corps de source de lumière (21). La lumière du corps de source de lumière est guidée vers l'intérieur de l'espace de culture (12) à l'aide d'un mécanisme de guide de lumière (plaque de guidage de lumière 22). Un mécanisme de conversion de longueur d'onde (23) est disposé dans l'espace entre le corps de source de lumière et l'extrémité d'incidence de lumière du mécanisme de guide de lumière pour ajuster le spectre de lumière irradiant la plante.
PCT/JP2022/007757 2021-02-24 2022-02-24 Système de culture de plantes WO2022181733A1 (fr)

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JPS63187836U (fr) * 1987-05-28 1988-12-01
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WO2013031400A1 (fr) * 2011-08-26 2013-03-07 コニカミノルタアドバンストレイヤー株式会社 Dispositif d'éclairage et dispositif pour cultiver des plantes
JP2015207481A (ja) * 2014-04-22 2015-11-19 ユーヴィックス株式会社 太陽光導光システム
JP2016042816A (ja) * 2014-08-21 2016-04-04 パナソニックＩｐマネジメント株式会社 植物育成装置
JP2018007620A (ja) * 2016-07-14 2018-01-18 株式会社小糸製作所 植物育成装置
KR101795443B1 (ko) * 2017-06-14 2017-11-09 주식회사 쉘파스페이스 양자점을 이용한 파장변환필름을 포함하는 태양광 변환 장치 및 이를 이용한 식물 재배 방법

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JPS61183606A (ja) * 1985-02-09 1986-08-16 Hoya Corp 色温度変換光源装置
JPS63187836U (fr) * 1987-05-28 1988-12-01
JPH09282922A (ja) * 1996-04-17 1997-10-31 Matsushita Electric Works Ltd カラーチェンジャ
JP2012009155A (ja) * 2010-06-22 2012-01-12 Asahi Rubber Inc 波長変換カバー、波長変換カバーを用いた照明装置、及び波長変換カバーを用いた照明装置の照明色変換方法
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