WO2017126681A1

WO2017126681A1 - Lighting device and cultivation equipment

Info

Publication number: WO2017126681A1
Application number: PCT/JP2017/001991
Authority: WO
Inventors: 直矢牛山; 範昭松永; 池田　裕一郎; まどか宮崎; 喜子高橋
Original assignee: 株式会社東芝
Priority date: 2016-01-21
Filing date: 2017-01-20
Publication date: 2017-07-27
Also published as: JP2017127273A

Abstract

Provided is a lighting device with which a cultivation body for plants or the like has a high cultivating effect. A cultivation lighting device of an embodiment of the present invention emits an emission spectrum including a first wavelength component having a light intensity between 600 nm and 700 nm, a second wavelength component having a light intensity between 500 nm and less than 600 nm, and a third wavelength component having a light intensity between 400 nm and less than 500 nm. The lighting device satisfies the condition that relative to the photosynthetically active photon flux of the three wavelength components, i.e., the first, second, and third wavelength components, the content (PPF-R) of the photosynthetically active photon flux of the first wavelength component is 50% to 65%, the content (PPF-G) of the photosynthetically active photon flux of the second wavelength component is 30% to 40%, and the content (PPF-B) of the photosynthetically active photon flux of the third wavelength component is 1% to 15%.

Description

Lighting equipment and cultivation equipment

Embodiment of this invention is related with an illuminator and cultivation equipment.

In recent years, research and development related to the cultivation of vegetables and the like in indoor facilities has become active. The indoor facility will be a clean room with limited invasion of bacteria. Thereby, it becomes possible to produce vegetables with few germs. Vegetables and the like produced in such a clean room can be stored for a long time with little damage caused by germs, and are suitable for cut vegetables and salads that require high freshness over the long term.

For the production of vegetables and the like in indoor facilities, a remote monitoring system for grasping the cultivation status, a sterilization system for disinfecting packing materials, and an air conditioning system for realizing an environment of uniform temperature and humidity are introduced. In addition, lighting devices such as fluorescent lamps and LEDs are installed for plant cultivation.

Japanese Patent Laying-Open No. 2015-2733 JP 2013-121331 A Special table 2014-510528 gazette

As described above, research and development related to the cultivation of vegetables and the like in indoor facilities has become active. For example, lighting technology that enhances the effect of growing plants and the like is desired.

An object of the present invention is to provide an illuminator and a cultivation facility having a high effect of growing a growing body such as a plant.

The illuminator of the embodiment includes a first wavelength component having a light intensity of 600 nm to 700 nm, a second wavelength component having a light intensity of 500 nm to less than 600 nm, and a third wavelength component having a light intensity of 400 nm to less than 500 nm. It is a growing illuminator that emits an emission spectrum including a wavelength component. In the illuminator, the content ratio (PPF-R) of the photosynthesis effective photon flux of the first wavelength component to the photosynthesis effective photon flux of the three wavelength components of the first, second, and third wavelength components is 50%. 65% or less, the content ratio of the photosynthesis effective photon flux of the second wavelength component (PPF-G) is 30% or more and 40% or less, and the content ratio of the photosynthesis effective photon flux of the third wavelength component (PPF-G) B) satisfies the condition of 1% to 15%.

It is a figure which shows an example of schematic structure of the hydroponic cultivation system common to 1st and 2nd embodiment. It is a figure which shows an example of schematic structure of the illuminating device which concerns on 1st Embodiment. It is sectional drawing which shows an example of schematic structure of an LED lamp. It is a figure which shows an example of schematic structure of the illuminating device which concerns on 2nd Embodiment. It is a block diagram which shows an example of schematic structure of the hydroponic cultivation system common to 1st and 2nd embodiment. It is a figure which shows an example of xy chromaticity coordinate. It is a figure which shows an example of the experimental result regarding the color temperature of each illuminating device. It is a figure which shows the 1st example of the stock weight cultivated by the hydroponic cultivation system (lighting device L1-L9). It is a figure which shows the 2nd example of the stock weight cultivated by the hydroponic cultivation system (lighting device L1-L9). It is a figure which shows the 3rd example of the stock weight cultivated by the hydroponic cultivation system (lighting device L1-L9). It is a figure which shows an example of the relationship between the RGB ratio of the illumination light of a hydroponic cultivation system (illuminating device L1-L5, L8, L9) and stock weight. It is a figure which shows an example of the relationship between the RGB ratio of the illumination light of the illuminating devices L1 to L9 and the stock weight, assuming that the stock weight cultivated by the hydroponic cultivation system (illuminating device L8) is 100%. It is a figure which shows an example of the taste analysis data of the cosmetics cultivated by FL (Fluorescent Lamp) illumination. It is a figure which shows an example of the relationship between cultivation days and sugar content. It is a figure which shows an example of the relationship between cultivation days and nitric acid. It is a figure which shows the 1st example of the combination of a some illuminator. It is a figure which shows the 2nd example of the combination of a some illuminator. It is a figure which shows the 3rd example of the combination of a some illuminator.

Embodiment

FIG. 1 is a diagram illustrating an example of a schematic configuration of a hydroponic cultivation system (cultivation equipment) common to the first and second embodiments. As shown in FIG. 1, the hydroponics system 1 has the cultivation bed 11 arrange | positioned on the cultivation shelf 10 provided in multiple steps in the up-down direction. In this embodiment, the cultivation shelf 10 is provided in three stages, but the number of cultivation shelves 10 is arbitrary. In the cultivation bed 11, a plurality of seedling receiving cups 14 for holding plants to be cultivated are arranged on top of the cultivation basket 13 that stores the culture solution 12. The seedling receiving cup 14 is held on top of the cultivation basket 13 via a flat cultivation tray 15 formed of foamable resin or the like. In the present embodiment, the seedling receiving cup 14 and the cultivation tray 15 constitute a growing body holding unit.

The seedling receiving cup 14 is formed into a cup shape by, for example, a resin material, and a circular hole 14a is formed on the bottom surface. In the seedling receiving cup 14, a medium for growing the growing body 5 such as plant seedlings and seeds is accommodated together with the growing body 5. As the medium, a fibrous material excellent in air permeability and water absorption, a block-like porous resin, a granular material, or the like can be used. The hole 14 a on the bottom surface of the seedling receiving cup 14 is used to absorb the culture solution 12 in the cultivation basket 13 into the culture medium and to extend the root 5 a of the growing body 5 in the seedling receiving cup 14 into the culture solution 12. . In addition, you may make it hang a water absorption cloth from the seedling receiving cup 14 in order to make the culture medium 12 suck to a culture medium.

In the cultivation basket 13, the culture solution 12 is supplied to the inside through the water supply unit 16, and the culture solution 12 exceeding a predetermined water level is discharged to the outside from the drain port 17. The water supply part 16 is arrange | positioned at the upper part of the one end side of the longitudinal direction of the cultivation basket 13. As shown in FIG.

The drain port 17 is formed in the bottom face of the other end side of the cultivation basket 13 in the longitudinal direction. The drainage port 17 is formed in a cylindrical drainage cylinder 18 that protrudes downward from the bottom wall of the cultivation basket 13. The positions of the drain ports 17 (drain tubes 18) of the cultivation rods 13 arranged in the vertical direction are set to be staggered in the longitudinal direction. A connecting pipe 19 is connected to the drain cylinder 18.

The connection pipe 19 connected to the drain cylinder 18 of the upper cultivation basket 13 is connected to the water supply unit 16 of the suspended cultivation basket 13. A connecting pipe 19 connected to the drain tube 18 of the middle cultivation basket 13 is connected to the water supply unit 16 of the lower cultivation basket 13. Further, the connection pipe 19 connected to the drain cylinder 18 of the lower cultivation basket 13 is connected to the culture medium tank 21. In addition, a foreign matter removal net that captures foreign matters such as dust flowing in with the culture solution is installed inside the culture solution tank 21. The culture tank 21 is connected to the water supply unit 16 of the upper cultivation rod 13 via the circulation pump 20.

A cylindrical water level adjusting cylinder 22 is detachably inserted into the drain port 17 of each cultivation basket 13. The water level adjusting cylinder 22 has an opening 22 a communicating with the upper space in the cultivation basket 13. The water level adjusting cylinder 22 discharges the culture solution 12 exceeding the predetermined water level in the cultivation basket 13 to the drain port 17 through the opening 22a.

Further, an illuminating device 30 for nurturing a growing body of the LED light source cylinder is installed above the seedling receiving cup 14 of each cultivation shelf 10. The illuminating device 30 includes a reflector (reflecting material) 30a, an illuminator 31 (or illuminators 32 and 33), and the like. The lighting device 30 will be described in detail later.

FIG. 2 is a diagram illustrating an example of a schematic configuration of the illumination device 30 according to the first embodiment. As shown in FIG. 2, the illumination device 30 includes a plurality of illuminators 31. The illuminator 31 is an illuminator having an emission spectrum having RGB wavelength components, and includes a plurality of LED (Light Emitting Diode) lamps 41 arranged in a straight line. In addition, although 1st Embodiment demonstrates the case where several LED lamp 41 is arrange | positioned at linear form (one line), even if the several LED lamp 41 is arrange | positioned at two or more linear forms (multiple line). Good.

FIG. 3 is a cross-sectional view showing an example of a schematic configuration of the LED lamp 41. As shown in FIG. 3, the LED lamp 41 has an LED chip 412 as a light emitting element. For example, a blue light emitting type LED chip is used as the LED chip 412. This LED chip 412 is mounted on a circuit pattern 415 provided on a substrate 413 via an electrical insulating layer 414.

The substrate 413 is made of a flat plate made of aluminum (Al), nickel (Ni), glass epoxy or the like having heat dissipation and rigidity. The circuit pattern 415 is made of an alloy of copper (Cu) and nickel (Ni), gold (Au), or the like, and has circuit patterns 415 on the anode side and the cathode side. The LED chip 412 is placed on one (for example, the anode side) circuit pattern 415, the bottom electrode is electrically connected, and the top surface electrode is electrically connected to the other (for example, the cathode side) circuit pattern 415 by the bonding wire 416. It is connected to the. A frame 418 is provided on the substrate 413 to form a truncated cone-shaped recess 417 that gradually increases in diameter upward, and the LED chip 412 is disposed in the recess 417. The frame 418 is made of, for example, polybutylene terephthalate (PBT), polyphthalamide (PPA), polycarbonate (PC), etc., and the recess 417 has a truncated cone shape with a depth of 0.5 to 1.0 mm, for example. Is formed.

In the concave portion 417 in which the LED chip 412 is disposed, a phosphor-containing resin layer 419 mainly containing a transparent resin (thermosetting resin) and containing two or more kinds of phosphors (arbitrary phosphors) having different main wavelengths. The LED chip 412 is sealed in the recess 417 by the phosphor-containing resin layer 419.

The phosphor-containing resin layer 419 is prepared by using a phosphor-containing resin (phosphor dispersion liquid) in which two or more kinds of phosphors are mixed and dispersed in a liquid transparent resin (thermosetting resin) and an injection device such as a dispenser. It is formed by injecting into the concave portion 417 in which the LED chip 412 is arranged and heat-curing. Examples of the transparent resin include a silicone resin and an epoxy resin. The use of a liquid silicone resin is preferred, and the use of a silicone resin having a viscosity of 1 to 70 Pa · s at 25 ° C. is particularly preferred from the viewpoint of ease of injection. The injection amount of the phosphor-containing resin in which two or more kinds of the phosphors are mixed and dispersed is approximately 5 to 10 mg. In the drawing, the upper surface of the phosphor-containing resin layer 419 is formed to be substantially flush with the upper end of the concave portion 417. However, the present invention is not limited to this. The main wavelengths of the two or more kinds of phosphors to be contained in the transparent resin are not particularly limited, and can be appropriately selected according to the emission color of the target LED lamp 411.

As the phosphor, for example, a yellow phosphor that is excited by blue light emitted from the blue light emitting type LED chip 412 and emits light between yellow light and orange light is used. Further, at least one of a green or yellow-green phosphor having a dominant wavelength of 500 to 560 nm and a red phosphor having a dominant wavelength of 620 to 650 nm can be used together with the yellow phosphor. Here, as a yellow phosphor that emits light between yellow light and orange light when excited by blue light, for example, RE3 (Al, Ga) 5O12: Ce phosphor (RE is selected from Y, Gd, and La) YAG phosphor such as AE2SiO4: Eu phosphor (AE represents an alkaline earth element such as Sr, Ba, Ca, etc. The same shall apply hereinafter) or Sr3SiO5: Eu2 + phosphor And silicate phosphors, sialon phosphors (for example, CaxSiyAlzON: Eu2 +), Ca3Sc2O4: Ce phosphors, and the like, which are selected from these. Examples of the green or yellow-green phosphor include YAG phosphors such as RE3 (Al, Ga) 5O12: Ce phosphors, silicate phosphors such as AE2SiO4: Eu phosphors and Ca3Sc2Si3O12: Ce phosphors, and sialon phosphors. Body (for example, CaxSiyAlzON: Eu2 +), Ca3Sc2O4: Ce phosphor, and the like, which are selected from these. As the red phosphor, an oxysulfide phosphor such as a La2O2S: Eu phosphor, a nitride-based phosphor (for example, AE2Si5N8: Eu2 +, CaAlSiN3: Eu2 +), or the like is used, but is not particularly limited.

In the LED lamp 41 configured as described above, the applied electric energy is converted by the LED chip 412 into blue light having a dominant wavelength of 420 to 480 nm (for example, 460 nm) and emitted, and the emitted blue light is converted into a phosphor. Two or more kinds of phosphors contained in the containing resin layer 419 are converted into light having a longer wavelength. Then, white light, which is a color based on the blue light emitted from the LED chip 412 and the emission colors of these phosphors, is emitted from the LED lamp 41.

For example, by adjusting the content and mixing ratio of two or more kinds of phosphors in the phosphor-containing resin layer 419 of the LED lamp 41, the lighting device 30 has the following characteristics (1) and (1-2). Or have the following characteristics (2) and (2-1).

(1) The illumination device 30 has a first wavelength component (red light: R) having a light intensity at 600 to 700 nm (600 nm to 700 nm or less) and a first wavelength component having a light intensity at 500 to 600 nm (for example, 500 nm to less than 600 nm). An emission spectrum including two wavelength components (green light: G) and a third wavelength component (blue light: B) having a light intensity at 400 to 500 nm (for example, 400 nm to less than 500 nm) is emitted. Further, the lighting device 30 includes the photosynthesis effective photon flux of the first wavelength component with respect to the photosynthesis effective photon flux (PPF: Photosynthetic Photon Flux) of the three wavelength components of the first, second, and third wavelength components. Ratio (PPF-R) is 50% or more and 65% or less, the content ratio of the photosynthesis effective photon flux of the second wavelength component (PPF-G) is 30% or more and 40% or less, and the photosynthesis of the third wavelength component The effective photon flux content (PPF-B) satisfies the condition of not less than 1% and not more than 15% (the lighting device 30 corresponds to one of the lighting devices L3 and L4 shown in FIG. 11).

(1-2) Further, the lighting device 30 emits light in a range where the color temperature is 2200K or higher and 3200K or lower and the chromaticity deviation is −0.015 or higher and 0.000 or lower (the lighting device 30 includes the lighting device L3 shown in FIG. 11). Corresponding to any of L4).

(2) The illumination device 30 has a first wavelength component (red light: R) having a light intensity at 600 to 700 nm (600 nm to 700 nm or less) and a first wavelength component having a light intensity at 500 to 600 nm (for example, 500 nm to less than 600 nm). An emission spectrum including two wavelength components (green light: G) and a third wavelength component (blue light: B) having a light intensity at 400 to 500 nm (for example, 400 nm to less than 500 nm) is emitted. Further, the illumination device 30 includes a content ratio (PPF-R) of the photosynthesis effective photon bundle of the first wavelength component with respect to the photosynthesis effective photon bundle of the three wavelength components of the first, second, and third wavelength components, The content ratio (PPF-G) of the photosynthesis effective photon flux of the second wavelength component and the content ratio (PPF-B) of the photosynthesis effective photon flux of the third wavelength component are PPF-R>PPF-G> PPF-B relationship, the photosynthesis effective photon flux content of the second wavelength component (PPF-G) satisfies the condition of 30% to 40%, color temperature of 2200K to 3200K, and chromaticity Light is emitted when the deviation is in the range of −0.015 or more and 0.000 or less (the illumination device 30 corresponds to any one of the illumination devices L1 to L4 shown in FIG. 11).
(2-1) Further, the illumination device 30 satisfies the condition that the content ratio (PPF-B) of the photosynthesis effective photon flux of the third wavelength component is 1% or more and 15% or less.

FIG. 4 is a diagram illustrating an example of a schematic configuration of the illumination device 30 according to the second embodiment. As shown in FIG. 4, the illuminating device 30 includes a plurality of illuminators (illuminators 32 and 33). The illuminator 32 is an illuminator having a white emission spectrum having RGB wavelength components, and includes a plurality of white LED lamps 42 arranged in a straight line. The basic configuration of the illuminator 32 and the LED lamp 42 is the same as that of the illuminator 31 and the LED lamp 41. The illuminator 33 is, for example, an LED lamp composed of a monochromatic blue LED 43 (peak emission wavelength λp = 400 nm or more and less than 500 nm). Alternatively, the illuminator 33 is, for example, an LED lamp composed of a monochromatic red LED 43 (peak emission wavelength λp = 600 nm to 700 nm). Alternatively, the illuminator 33 is, for example, an LED lamp configured by a white LED 43 having an emission spectrum different from that of the illuminator 32.

The lighting device 30 according to the second embodiment has the following characteristics (1) and (1-2) by controlling the outputs of the illuminator 32 and the illuminator 33, or the following (2) and (2 -1).

The white LED lamp is not limited to the one described above. For example, an LED lamp that realizes white light emission using three LED chips that emit light in blue, green, and red colors. May be applied, or an LED lamp that realizes white light emission may be applied by combining an LED chip that emits ultraviolet light and a three-color mixed phosphor that emits blue, green, and red light. .

FIG. 5 is a block diagram showing an example of a schematic configuration of a hydroponic cultivation system common to the first and second embodiments. As shown in FIG. 5, the hydroponics system includes an input unit 51, a storage unit 52, an information processing unit 53, a lighting control unit 54, and a lighting device 30.

The input unit 51 is configured by a keyboard, a display, and the like, and corresponds to the input operation of the user, for example, of the desired taste, nutrient content, sugar content, nitrate value, etc. Enter at least one piece of information. The storage unit 52 stores conversion data. The information processing unit 53 generates and outputs illumination control information based on the conversion data stored in the storage unit 52 and information input from the input unit 51. The illumination control unit 54 controls the illumination device 30 based on the illumination control information. For example, the illumination control unit 54 independently controls the output of each illuminator constituting the illumination device 30. For example, the illumination control unit 54 controls the output balance, intensity, output days (cultivation days), and the like of the plurality of illuminators 31 that configure the illumination device 30 based on the illumination control information. Moreover, the illumination control part 54 controls the output balance, intensity | strength, output days (cultivation days), etc. of the some illuminator 32 and the some illuminator 33 which comprise the illuminating device 30 based on illumination control information. Thereby, for example, the average value of the value of the photosynthesis effective photon flux density (PPFD: Photosynthetic Photon Flux Density) is 150 umol m-2 s-1 or more.

Hereinafter, the operational effects of the hydroponic cultivation system according to the first and second embodiments will be described.

FIG. 6A is a diagram showing an example of xy chromaticity coordinates. Harvest weight, cultivation days, taste components, etc. in cultivation of a growing body such as a plant by chromaticity ranges R1 (ANSI standard 2700K), R2 (ANSI standard 3000K), R3, R4, R5, R6 (2000K) shown in FIG. 6A The experiment was conducted.

FIG. 6B is a diagram showing an example of experimental results regarding the color temperatures of the lighting devices L1 to L9. For example, the illumination devices L1 to L5 and L9 are LED illuminations that realize white light emission, the illumination device L6 is white LED illumination and blue single color LED illumination, and the illumination device L7 is white LED illumination and It is a red single color LED illumination, and the illumination device L8 is a FL (Fluorescent lamp) illumination. The illumination device 30 described above corresponds to the illumination devices L1 to L4, for example. In the lighting devices L1 to L4 (especially in the lighting devices L3 and L4), good results were obtained with respect to improvement in harvest weight, shortening of cultivation days, and improvement in taste components. The data shown in FIG. 6B is data obtained by using a measuring instrument (MK-350) manufactured by UPR tek, and measuring the detector toward the light source (illumination devices L1 to L9). is there.

FIG. 7 is a diagram showing a first example of the strain weight cultivated by the lighting devices L1 to L9 having different characteristics. FIG. 8 is a diagram showing a second example of the strain weight cultivated by the lighting devices L1 to L9. FIG. 9 is a diagram showing a third example of the strain weight cultivated by the lighting devices L1 to L9. FIG. 10 is a diagram illustrating an example of the relationship between the RGB ratio of the illumination light of the illumination devices L1 to L5, L8, and L9 and the stock weight. FIG. 11 is a diagram illustrating an example of the relationship between the RGB ratio of the illumination light of the lighting devices L1 to L9 and the stock weight, with the stock weight cultivated by the hydroponic cultivation system (the lighting device L8) being 100%. Note that the data shown in FIG. 11 is based on data obtained by using a measuring instrument (MK-350) manufactured by UPR tek and measuring the detector toward the light source (illuminating devices L1 to L9). It is the generated data.

As shown in FIGS. 7 to 9, in the lighting devices L1 to L4 (particularly L3 and L4), good results were obtained with respect to the cultivation promotion effect (improvement of harvest weight and reduction of cultivation days). The lighting device 30 of the hydroponic cultivation system according to the first and second embodiments corresponds to the lighting device L1, L2, L3, or L4, and can promote cultivation (improvement of harvest weight and reduction of cultivation days). it can. Moreover, as shown in FIG. 11, the weight of cosmetics has a high correlation with PPFD (R). For example, in the lighting device L4, R: G: B = 6: 3: 1, and this RGB ratio is appropriate. It is an example of a proper ratio. As shown in FIG. 11, at least one of the first condition for adjusting G to 30-40% and the second condition for adjusting B to 1-15% of the RGB ratio is satisfied. Thus, good results can be obtained. Further, by satisfying all of the first condition, the second condition, and the third condition for adjusting R to 50-65%, a better result can be obtained. Further, it is possible to analyze and optimize the nutrients of cosmetics cultivated by the lighting devices L1 to L4.

FIG. 12 is a diagram showing an example of taste analysis data of cosmetics grown by FL (Fluorescent lamp) lighting. For example, examples of taste analysis data of cosmetus cultivated by white FL (Fluorescent 照明 Lamp) illumination, white FL illumination and blue monochromatic LED illumination, and white FL illumination and red monochromatic LED illumination FIG. As shown in FIG. 12, for example, when blue light is strong, salty taste (taste) is strong, and when red light is strong, umami (prior taste) and umami richness (aftertaste) are suppressed. The longer the cultivation days, the higher the sugar content. By adjusting the spectrum of the light irradiated to the growing body from the illuminating device 30, the taste of the harvested growing body can be adjusted.

FIG. 13 is a diagram showing an example of the relationship between the cultivation days and sugar content. As shown in FIG. 13, the sugar content tends to increase according to the number of cultivation days. L4 in FIG. 13 shows an example of the relationship between the number of cultivation days by the lighting device 30 and the sugar content. Moreover, FIG. 14 is a figure which shows an example of the relationship between the cultivation days and nitric acid. As shown in FIG. 13, the nitric acid value increases until the 20th day of cultivation, but then tends to decrease. Thus, the nutrients (sugar content, nitric acid value, etc.) of the harvested growing bodies can be controlled (adjusted) by adjusting the cultivation days. L8 in FIG. 12 shows an example of the relationship between the number of cultivation days by the lighting device 30 and the nitric acid value.

The storage unit 52 of the hydroponic cultivation system of the first and second embodiments stores taste analysis data shown in FIG. 12, sugar content change data shown in FIG. 13, nitrate value change data shown in FIG. The input unit 51 inputs at least one information of a desired taste, nutrient content, sugar content, nitric acid value, and the like of the growing body to be cultivated. The information processing unit 53 generates and outputs illumination control information based on the data stored in the storage unit 52 and information input from the input unit 51. The illumination control unit 54 controls the illumination device 30 based on the illumination control information. Thereby, breeding bodies, such as the taste which the breeding body to grow, content of nutrients, sugar content, and a nitric acid value, can be grown.

FIG. 15 is a diagram illustrating a first example of a combination of a plurality of illuminators. For example, the lighting device 30 shown in the second embodiment includes

illuminators

32 and 33. For example, as illustrated in FIG. 15, the illuminating device 30 according to the second embodiment can combine a plurality of illuminators (illuminators 32 and 33) having different wavelength components so that a desired combined spectrum is obtained. Can be released. That is, the lighting device 30 shown in the second embodiment has the characteristics (1), (1-2), (2), and (2-1).

FIG. 16 is a diagram showing a second example of a combination of a plurality of illuminators, and FIG. 17 is a diagram showing a third example of a combination of a plurality of illuminators. For example, the lighting device 30 shown in the second embodiment includes

illuminators

32 and 33. For example, as illustrated in FIG. 16, the illuminating device 30 illustrated in the second embodiment is configured by combining (combining) a plurality of illuminators (illuminators 32 (LED1) and 33 (LED2)) having different wavelength components. The desired synthetic spectrum can be emitted. That is, the lighting device 30 shown in the second embodiment has the characteristics (1), (1-2), (2), and (2-1). Furthermore, as shown in FIG. 17, the illumination apparatus 30 shown in 2nd Embodiment can discharge | release a desired synthetic | combination spectrum by providing the reflecting plate (reflecting material) 30a in the illumination apparatus 30. As shown in FIG. That is, the lighting device 30 shown in the second embodiment has the characteristics (1), (1-2), (2), and (2-1).

According to the hydroponic cultivation system described above, it is possible to improve the harvest weight, shorten the cultivation days, and adjust the taste components by adjusting the RGB ratio in the spectrum of light irradiated to the growing body such as plants.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

Claims

An emission spectrum including a first wavelength component having a light intensity of 600 nm to 700 nm, a second wavelength component having a light intensity of 500 nm to less than 600 nm, and a third wavelength component having a light intensity of 400 nm to less than 500 nm. An illuminating illuminator that emits,
The content ratio (PPF-R) of the photosynthesis effective photon bundle of the first wavelength component to the photosynthesis effective photon bundle of the three wavelength components of the first, second, and third wavelength components is 50% or more and 65% or less, The photosynthesis effective photon flux content (PPF-G) of the second wavelength component is 30% or more and 40% or less, and the photosynthesis effective photon flux content (PPF-B) of the third wavelength component is 1%. An illuminator characterized by satisfying the condition of 15% or less.
The illuminator according to claim 1, wherein the illuminator emits light in a color temperature range of 2200K to 3200K and a chromaticity deviation of -0.015 to 0.000.
An emission spectrum including a first wavelength component having a light intensity of 600 nm to 700 nm, a second wavelength component having a light intensity of 500 nm to less than 600 nm, and a third wavelength component having a light intensity of 400 nm to less than 500 nm. An illuminating illuminator that emits,
The content ratio (PPF-R) of the photosynthesis effective photon bundle of the first wavelength component with respect to the photosynthesis effective photon bundle of the three wavelength components of the first, second, and third wavelength components, and the second wavelength component The content ratio of the photosynthetic effective photon flux (PPF-G) and the photosynthesis effective photon flux content of the third wavelength component (PPF-B) are in the relationship of PPF-R>PPF-G> PPF-B. The content ratio (PPF-G) of the photosynthesis effective photon flux of the second wavelength component satisfies the condition of 30% to 40%, the color temperature is 2200K to 3200K, and the chromaticity deviation is -0.015 to 0.000 An illuminator characterized by emitting light in the range of.
The illuminator according to claim 3, wherein the content ratio of the photosynthesis effective photon flux of the third wavelength component satisfies a condition of 1% or more and 15% or less.
5. The illuminator according to claim 1, wherein the illuminator is an LED illumination composed of a blue monochromatic LED chip and an arbitrary phosphor.
An illumination device comprising a plurality of illuminators;
In order to irradiate a growing body with a desired emission spectrum from each illuminator, a control unit that independently controls the output of each illuminator
With
The illumination device includes a first wavelength component having a light intensity of 600 nm to 700 nm, a second wavelength component having a light intensity of 500 nm to less than 600 nm, and a third wavelength component having a light intensity of 400 nm to less than 500 nm. An illuminating device for emitting an emission spectrum including:
In the illumination device, the content ratio (PPF-R) of the photosynthesis effective photon bundle of the first wavelength component to the photosynthesis effective photon bundle of the three wavelength components of the first, second, and third wavelength components is 50%. The first condition of 65% or less, the second condition that the content ratio (PPF-G) of the photosynthesis effective photon flux of the second wavelength component is 30% or more and 40% or less, and the third wavelength component A cultivation facility characterized in that the content rate (PPF-B) of the photosynthetic effective photon bundle satisfies the third condition of 1% or more and 15% or less.
The cultivation facility according to claim 6, wherein the average value of the photosynthetic effective photon flux density on the cultivation surface of the grown body is 150 umol150m-2 s-1 or more.
The lighting device includes first and second illuminators,
The first illuminator emits a white-based emission spectrum including the first, second, and third wavelength components, and the second illuminator includes a blue-based LED having the third wavelength component. The cultivation facility according to claim 6 or 7, wherein the cultivation facility is illumination.
The lighting device includes first and second illuminators,
The first illuminator emits a white-based emission spectrum including the first, second, and third wavelength components;
The cultivation facility according to claim 6 or 7, wherein the second illuminator is red LED illumination of the first wavelength component.
The cultivation equipment according to claim 6 or 7, wherein the lighting device has two or more types of white emission spectra.
A setting unit for setting at least one of desired taste, nutrient content, sugar content, and nitric acid value;
A control unit for controlling the output of the lighting device based on the information;
A cultivation facility according to any one of claims 6 to 10.
The cultivation equipment according to any one of claims 6 to 11, further comprising a light reflection plate that reflects light from the illumination device in order to satisfy the first, second, and third conditions.