KR102017999B1 - Energy independent cultivation apparatus utilizing artificial light source - Google Patents

Abstract

An energy independent cultivation apparatus using a pink LED light source is disclosed. Energy-independent cultivation apparatus according to an aspect of the present invention is a growing unit for arranging at least one cultivation unit for cultivating the crop layer; Solar power plate for converting solar energy into electrical energy; An illumination device that illuminates artificial light on the crop being grown in the cultivation unit by using the electric energy converted by the solar power plate; At least one light collecting plate having a concave curved shape to collect natural light; An optical fiber member for transmitting natural light collected by the light collecting plate to the cultivation unit; And an auxiliary lighting device for irradiating the crop under cultivation with natural light transmitted through the optical fiber member.

Description

Energy-independent cultivation device using artificial light source {ENERGY INDEPENDENT CULTIVATION APPARATUS UTILIZING ARTIFICIAL LIGHT SOURCE}

The present invention relates to a cultivation apparatus for cultivating crops, and more particularly, to an energy independent type cultivation apparatus using an artificial light source.

In general, the plant factory based on artificial photosynthesis is a fusion or systemization of agricultural-IT-energy or agricultural-IT-biotechnology, which is expected to develop into a high value-added future industry. It is a research field that is attracting attention in terms of solving global challenges.

The plant factory is a system that produces plants automatically by artificially controlling and supplying light, temperature, humidity, CO ₂ concentration, and culture solution in production facilities that mainly produce vegetables or functional plants. It is a future industry that can produce and produce pollution-free crops without depending on the external environment by technology convergence such as bio.

Recently, the government has actively reviewed the commercialization and has been piloting some local governments. The scale of business is increasing every year, but there are many barriers to overcome in order to reach full-scale mass production.

Typically, there is a problem that a lot of power costs are required to maintain the plant environment of the plant factory. That is, the light irradiation corresponding to 440nm and 680nm, which are the key wavelengths of photosynthesis promotion, mainly uses LED light around 450 / 650nm. In order to form the light environment necessary for forming the target component, fluorescent lamps and the like have been used.

However, plant plants using LEDs and fluorescent lamps consume a lot of power to maintain a growing environment, and to increase market competitiveness by expanding production scale, they must bear power costs of several kW / m ² per unit growing area per month. Therefore, at least to secure profitability of the plant, the power cost must be lowered to less than one third of the total production cost.

Therefore, the development of innovative light source technology, which is cost-effectiveness, high-efficiency and optimized for plant growth, is an essential prerequisite for the development and leap of artificial photosynthetic-based plant plants.

Among the crops that can be cultivated in plant factories, ginseng is a root plant that grows in the shade, so it is cultivated in the shade of the field or around the house, or it is cultivated artificially by covering it with a shading net. Such a cultivation method may adversely affect the growth of ginseng according to environmental conditions such as typhoon, rainy season, and flood, and may also occur by strong ultraviolet rays in summer. Without these environmental constraints, measures are needed to grow crops on a standard basis without affecting the surrounding environment.

Publication No. 10-2004-0011747 (published Feb. 11, 2004)

The present invention has been made to solve the above problems, the wavelength of 440nm range and 680nm range of two wavelengths required for plant photosynthesis can be irradiated simultaneously from a single light source of artificial photosynthesis-based plant factory The purpose is to provide a pink LED light source for artificial photosynthesis of plants that can reduce power consumption.

In addition, the present invention is to provide an energy-independent cultivation apparatus capable of cultivating crops such as root plants such as ginseng efficiently and economically.

In addition, the present invention is to provide an energy-independent cultivation apparatus that can be utilized for the cultivation of crops by efficiently collecting natural light using a light collecting plate.

In addition, the present invention is to provide an energy-independent cultivation apparatus that can uniformly control the cultivation conditions, such as natural light dimming for the crops being cultivated for each layer.

In addition, the present invention is to provide an energy self-supporting cultivation apparatus that can prevent the growth of mold on the root of the crop economically by using ultraviolet light of natural light.

Energy-independent cultivation apparatus according to an aspect of the present invention is a growing unit for arranging at least one cultivation unit for cultivating the crop layer; A solar power plate provided on an upper surface of the body and converting solar energy into electrical energy; An illumination device that illuminates artificial light on the crop being grown in the cultivation unit by using the electric energy converted by the solar power plate; At least one light collecting plate provided on an outer surface of the body and having a concave curved shape to collect natural light; An optical fiber member for transmitting natural light collected by the light collecting plate to the cultivation unit; And an auxiliary lighting device for irradiating the crop under cultivation with natural light transmitted through the optical fiber member.

The lighting device may include a pink LED light source that simultaneously illuminates blue and red light.

The pink LED light source may be coated with a red phosphor that generates light corresponding to a wavelength of 600 to 700 nm to a blue LED light source.

The red phosphor is M ₂ Si ₅ N _8: Eu ²⁺ (M = Ca, Sr, Ba), CaAlSiN _3: Eu ²⁺ , 6MgO · As ₂ O ₅ : Mn ⁴⁺ , 3.5MgO.0.5MgF _2. It may be at least one of GeO ₂ : Mn ⁴⁺ .

The pink LED light source may simultaneously provide blue light corresponding to a wavelength of 440 nm and red light corresponding to a wavelength of 680 nm.

The lighting device comprises: a white LED to provide white light; And a red LED providing red light.

The lighting device may include: an artificial LED light source that simultaneously illuminates blue and yellow light.

The cultivation unit, a cultivation frame; A support member inserted into a hole formed in the cultivation frame to support the crop; And a supply unit provided below the cultivation frame to supply water and nutrients to the root portion of the crop.

The auxiliary lighting device may irradiate the crops with natural light transmitted through the optical fiber member at the upper portion of the rearrangement.

The energy self-supporting cultivation apparatus, may be provided in the lower portion of the cultivation frame, by irradiating ultraviolet rays to the root portion of the crop to prevent mold from growing on the root of the crop; may further include a.

The energy self-supporting cultivation apparatus may further include a light splitter configured to distribute the natural light collected by the light collecting plate to ultraviolet rays and non-ultraviolet rays.

The optical fiber member may include: a first optical fiber tube configured to transmit non-ultraviolet rays distributed by the optical splitter to the auxiliary lighting device; And a second optical fiber tube configured to transfer the ultraviolet rays distributed by the optical splitter to the ultraviolet ray generating apparatus.

The ultraviolet generating device, the ultraviolet irradiation unit for irradiating ultraviolet rays transmitted through the second optical fiber tube to the root portion of the crop; A measuring unit measuring the amount of ultraviolet light transmitted through the second optical fiber tube; And an ultraviolet generator for generating ultraviolet light according to the amount of ultraviolet light and irradiating the root portion of the crop.

The optical splitter may include a beam splitter that transmits one of ultraviolet rays and non-ultraviolet rays of the natural light and reflects the other.

The first optical fiber tube and the second optical fiber tube may include at least one optical coupler for distributing the natural light so that uniform natural light is transmitted to a plurality of layers of cultivation units.

The energy self-supporting cultivation apparatus includes a sensing unit including a plurality of thermoelectric elements provided along a circumferential direction of the light collecting plate and generating an electrical signal according to a temperature difference between the plurality of thermoelectric elements; And a driver configured to adjust the direction of the light collecting plate according to the electrical signal generated by the sensing unit.

The sensing unit may include first pairs of thermoelectric elements provided at both sides of the light collecting plate along a first direction; And a second thermoelectric element pair provided on both sides of the light collecting plate along a second direction perpendicular to the first direction, wherein the driving unit includes the second light collecting plate according to a temperature difference of the first thermoelectric element pair. A first driving device that rotates in one direction; And a second driving device which rotates the light collecting plate in the second direction according to a temperature difference between the pair of second thermoelectric elements.

According to an embodiment of the present invention, since a wavelength of 440 nm and a wavelength of 780 nm, which are two wavelengths required for plant photosynthesis, can be irradiated at the same time, a power source of a plant factory can be drastically reduced to achieve economic efficiency. It works.

According to an embodiment of the present invention, there is provided an energy self-supporting cultivation apparatus capable of cultivating crops such as root plants such as ginseng efficiently and economically.

In addition, according to an embodiment of the present invention, there is provided an energy-independent self-cultivation device that can be utilized for the cultivation of crops by efficiently collecting natural light using a light collecting plate.

In addition, according to an embodiment of the present invention, there is provided an energy-independent cultivation apparatus that can uniformly control the cultivation conditions, such as natural light dimming for the crops being cultivated for each layer.

In addition, according to an embodiment of the present invention, there is provided an energy self-supporting cultivation apparatus that can prevent mold from growing at the root of the crop economically by using ultraviolet light of natural light.

1 is a perspective view of an energy self-supporting cultivation apparatus according to an embodiment of the present invention.
2 is a cross-sectional view of an energy self-supporting cultivation apparatus according to an embodiment of the present invention.
3 is a cross-sectional view of a light collecting plate, a light splitter, and an optical fiber member constituting an energy self-supporting cultivation apparatus according to an embodiment of the present invention.
4 is a cross-sectional view of a cultivation unit constituting an energy self-supporting cultivation apparatus according to an embodiment of the present invention.
5 is a view showing the configuration of a pink LED light source for artificial photosynthesis of plants according to an embodiment of the present invention.
6A and 6B illustrate two wavelengths emitted from a pink LED light source for artificial photosynthesis of plants according to an embodiment of the present invention.
7 is a view showing color coordinates of a pink LED light source for artificial photosynthesis of plants according to an embodiment of the present invention.
8 is an image photographing the light emitted from the pink LED light source manufactured according to an embodiment of the present invention.
FIG. 9 is a graph showing the emission wavelength of the red phosphor M ₂ Si ₅ N _8: Eu ²⁺ .
FIG. 10 is a graph showing the emission wavelength of the red phosphor CaAlSiN _3: Eu ²⁺ .
FIG. 11 is a graph showing the emission wavelength of the red fluorescent substance 6MgO · As ₂ O ₅ : Mn ⁴⁺ .
FIG. 12 is a graph showing the emission wavelength of the red fluorescent substance 3.5MgO.0.5MgF ₂ .GeO ₂ : Mn ⁴⁺ .
FIG. 13 is a configuration diagram of an ultraviolet light generating device constituting an energy self-supporting cultivation device according to an embodiment of the present invention.
14 is a cross-sectional view of a light collecting plate constituting an energy self-supporting cultivation apparatus according to another embodiment of the present invention.
15 is a plan view of a light collecting plate constituting the energy self-supporting cultivation apparatus according to another embodiment of the present invention.
16 is a cross-sectional view showing an operating state of the light collecting plate constituting the energy self-supporting cultivation apparatus according to another embodiment of the present invention.

Other advantages and features of the present invention, and methods of achieving them will become apparent with reference to the following embodiments in detail in conjunction with the accompanying drawings. All terms used herein have the same meaning as generally accepted in the art to which the present invention belongs. General descriptions of known configurations may be omitted so as not to obscure the subject matter of the present invention. In the drawings of the present invention, the same reference numerals are used for the same or corresponding configurations. In order to help the understanding of the present invention, some of the components in the drawings may be somewhat exaggerated or reduced.

1 is a perspective view of an energy self-supporting cultivation apparatus according to an embodiment of the present invention. 2 is a cross-sectional view of an energy self-supporting cultivation apparatus according to an embodiment of the present invention.

1 and 2, the energy self-supporting cultivation apparatus 100 according to the present embodiment includes a body 110, a cultivation unit 120, a photovoltaic plate 130, a light collecting plate 140, and a light splitter 150. ) And optical fiber members 170 and 180.

The energy self-supporting cultivation apparatus 100 according to the present embodiment is provided to be suitable for cultivating crops such as root plants such as ginseng. The body 110 may be provided in the form of a hexahedron container so as to exclude the environmental influences such as seasons, ambient temperature, weather conditions, typhoons, and rainy season, and to constantly grow crops regardless of the surrounding environment. have.

In one embodiment, the body 110 may have a sealed inner space. The cultivation unit 120, the solar panel 130, the light collecting plate 140, the light splitter 150, and the optical fiber members 170 and 180 are provided in the inner space of the body 110. Although not shown, the body 110 may be provided with an entrance and exit for entering and exiting the internal space, and a ventilation device for ventilating the internal space.

The cultivation unit 120 has at least one cultivation unit 122, 124, 126, 128 for cultivating crops arranged in layers. 2 illustrates a structure in which the cultivation units 122, 124, 126, and 128 are stacked in four layers, but the number of layers of the cultivation unit 120 may be provided in a plurality of layers other than one or four layers. Do.

The photovoltaic plate 130 is for converting photovoltaic energy into electrical energy to be utilized for cultivating crops so that crops can be grown in energy-independent type, and may be provided on the upper surface of the body 110 for efficient power generation.

Electrical energy converted by the solar panel 130 is supplied to the cultivation units (122, 124, 126, 128) is utilized for the purpose of crop cultivation, such as lighting, or to a charging device (not shown) such as a battery Can be stored.

Condensing plate 140 is to collect the natural light directly to the crop to utilize the crop cultivation, is provided on the outer surface of the body 110, and made of a concave curved shape toward the bottom for the condensing of natural light. The inner surface of the light collecting plate 140 may be provided with a material having high reflectivity so that natural light may be reflected and effectively introduced into the optical fiber.

In the embodiment of FIG. 1, four light collecting plates 140 are installed at four corner positions of the upper surface of the body 110 that do not interfere with the photovoltaic plate 130, but the light collecting plate 140 is one or more than four. It may be provided in plurality.

The light collecting plate 140 may be disposed to face upward for efficient collection of natural light. The light transmitting plate 142 may be installed in the upper opening of the light collecting plate 140 so that rainwater or foreign matter does not flow into the light collecting plate 140. In addition, a means such as a lens for condensing may be provided in the upper opening of the light collecting plate 140. The natural light collected by the light collecting plate 140 is transmitted to the cultivation units 122, 124, 126, and 128 through the light splitter 150 and the optical fiber members 170 and 180.

3 is a cross-sectional view of a light collecting plate, a light splitter, and an optical fiber member constituting an energy self-supporting cultivation apparatus according to an embodiment of the present invention. 1 to 3, the natural light collected by the light collecting plate 140 is transmitted to the light splitter 150 through the optical fiber 160 connected to the center of the light collecting plate 140.

The optical splitter 150 is provided at the end of the optical fiber 160 to distribute natural light L transmitted through the optical fiber 160 to ultraviolet (L2) and non-ultraviolet (L1). In one embodiment, the optical splitter 150 transmits any one of the ultraviolet (L2) and non-ultraviolet (L1) of the natural light (L) transmitted through the optical fiber 160, and reflects the other beam splitter 152 ) May be provided.

In the example of FIG. 3, the beam splitter 152 is configured to transmit ultraviolet light L2 among natural light L and reflect non-ultraviolet light L1 such as visible light, but is configured to transmit non-ultraviolet light and reflect ultraviolet light. It is also possible. Alternatively, the optical splitter 150 may be used as long as it is a device capable of separating light into ultraviolet and non-ultraviolet rays as well as the beam splitter 152.

In one embodiment, the optical fiber members 170 and 180 may include a first optical fiber tube 170 and a second optical fiber tube 180 branched from the optical splitter 150. The first optical fiber tube 170 transmits the non-ultraviolet light L1 distributed by the optical splitter 150 to the cultivation units 122, 124, 126, and 128. The second optical fiber tube 180 delivers the ultraviolet light L2 distributed by the light splitter 150 to the cultivation units 122, 124, 126, and 128.

The first optical fiber tube 170 and the second optical fiber tube 180 are configured to supply a uniform amount of light for each of the stacked cultivation units 122, 124, 126, and 128 using means such as an optocoupler (not shown). Can be.

For example, when n (n is an integer of 2 or more) cultivation units 122, 124, 126, and 128 are stacked, (n-1) optocouplers may be provided, and the optocouplers may be provided sequentially. By dividing the natural light into 1: (nk) (k is the order of the optocoupler), 1 / n of natural light can be supplied to the cultivation unit (122, 124, 126, 128) for each layer.

In another embodiment, when the plurality of light collecting plates 140 are configured to transmit the natural light collected by each light collecting plate 140 to the cultivation units of different layers, the natural light is distributed to the cultivation units of the plural layers. The optocoupler can be omitted.

The non-ultraviolet light L1 transmitted to the cultivation units 122, 124, 126, and 128 through the first optical fiber tube 170 may be used for providing auxiliary lighting to crops. Ultraviolet light L2 transmitted to the cultivation units 122, 124, 126, and 128 through the second optical fiber tube 180 may be used to sterilize the roots of crops to prevent mold from growing on the roots of the crops. .

4 is a cross-sectional view of a cultivation unit constituting an energy self-supporting cultivation apparatus according to an embodiment of the present invention. 1 to 4, the cultivation unit 122 may include a cultivation frame 122a, a support member 122b, a supply part 122c, and a drain part 122d for hydroponic cultivation.

The rearrangement frame 122a may be formed in a plate shape. For example, the cultivation frame 122a may be provided as a plate member such as styrofoam. Holes are penetrated through the rearrangement 122a at predetermined intervals in the longitudinal and transverse directions.

The support member 122b may be inserted into a hole formed in the growing frame 122a to support the stem portion of the crop 1. For example, the support member 122b may be provided as a member such as a sponge.

The supply part 122c is provided at the lower part of the cultivation frame 122a, receives water and nutrients through a pipe (not shown) by means of a pump or the like, and sprays upward through a nozzle to spray the roots of the crop 1. ) Water and nutrients can be supplied.

The drain portion 122d is for recovering water and nutrients that fall after being supplied to the root 12 portion of the crop 1 and is provided at the bottom of the cultivation unit 122. Water and nutrients recovered by the drain portion 122d are delivered to the supply tank and circulated, thereby reducing the amount of water and nutrients, thereby reducing the cost of planting.

An upper portion of the cultivation unit 122 is provided with an illumination device 132 for illuminating light on the stem and leaf portions of the crop 1 being cultivated in the cultivation unit 122. The lighting device 132 may illuminate the artificial light to the crop 1 by using the electrical energy converted by the photovoltaic plate 130. In one embodiment, the lighting device 132 may be provided as a surface light emitting device such as a light emitting diode (LED).

According to one embodiment of the invention, the lighting device 132 may include a pink LED light source for illuminating purple light and red light at the same time. The pink LED light source will be described in detail later.

According to another embodiment of the present invention, the lighting device 132 may include a white LED for providing white light and a red LED for providing red light. In this embodiment, the white LED and the red LED are disposed adjacent to each other so that the white light and the red light can be irradiated simultaneously to the crop. Here, the red light may have a wavelength of 660 nm, but is not limited thereto.

At the top of the planting frame 122a, an auxiliary lighting device 172 is provided for providing auxiliary lighting of appropriate light to the stem and leaf portions of the crop 1. Non-ultraviolet light transmitted to the auxiliary lighting device 172 through the first optical fiber tube 170 is supplied to the crop 1 through the light transmission window 174.

In one embodiment, the lighting device 132 may be provided to adjust the amount of illumination light in accordance with the amount of natural light provided by the auxiliary lighting device 172. To this end, a measuring device (not shown) for measuring the amount of non-ultraviolet light transmitted to the auxiliary lighting device 172 may be provided. The difference between the reference value and the non-ultraviolet light amount may be compared with the reference value. The brightness of the lighting device 132 may be adjusted according to the value.

When a strong ultraviolet ray of natural light is irradiated to the crop 1, the leaves of the crop 1 may burn, which may adversely affect the growth of the crop 1 due to the failure of the photosynthesis and the like, but according to the present embodiment By supplying only the non-ultraviolet rays excluding the ultraviolet rays by the light splitter 150 to the crops 1, it is possible to prevent annihilation due to strong ultraviolet rays while providing proper natural light necessary for the cultivation of the crops 1.

Further, according to this embodiment, by providing natural light to the crop 1 as an auxiliary light source, the power consumption of the lighting device 132 is reduced by the amount of non-ultraviolet light provided to the crop 1 by the auxiliary lighting device 172. Can be.

In addition, in the case of the sealed cultivation apparatus, when a plurality of cultivation units are stacked, natural light is not transmitted to the cultivation unit of the lower layer, so that uniform light may not be supplied to the crop for each layer. According to the present invention, uniform natural light (non-ultraviolet) is provided for each layer through the first optical fiber tube 170, and crops can be cultivated over all layers.

The ultraviolet generating device 190 may be provided under the rearrangement 122a. The ultraviolet generating device 190 is irradiated with ultraviolet rays to the root portion 12 of the crop 1 to prevent mold from growing on the root 12 of the crop 1. The ultraviolet rays distributed by the optical splitter 150 are transmitted to the ultraviolet ray generating device 190 through the second optical fiber tube 180.

In the case of growing different crops by the growing units 122, 124, 126, 128, each of the growing units 122, 124, 126, 128 has lighting (artificial lighting and / or natural light), ultraviolet light, water and nutrients to the crops. The ingredients and the amount of the feed may be adjusted differently, and the growing conditions may be adjusted according to the growth process of each crop.

Table 1 below shows the absorption wavelength range of the photoreceptor of the plant and the characteristics of the light distribution of the various light sources. It can be seen that the light absorption spectrum of the photoreceptor chlorophyll is mainly concentrated in blue or purple and red. .

Major photoreaction Photoreceptor Main absorption wavelength range (nm) photosynthesis Chlororoll Blue: 400-500
Red: 640-700 Carotenoid Blue: 400-530 Optical form formation Phytochrome UV-A + Blue: 380-480
Red: 540-690
Primary red: 700-750 (photonic reaction) Cryptochrome Near UV-A380
Blue: 450 Phototropin Near UV-A380
Blue: 450 (photorefractive reaction)

The optimum light distribution for photosynthesis is reported to be 24% blue light, 32% green light and 44% red light. Moreover, plant shape (leaf and stem growth) is 660nm (red light) and 730nm (far red light: Far-). It is known that there is a close correlation with the photo flux ratio (R / FR) including the wavelength band of Red). If this value is too high, the leaves and stems will not grow properly. Generally, artificial light sources except incandescent bulbs do not satisfy the light environment enough for plants to grow because the R / FR level is higher than that of natural light.

Therefore, it is necessary to develop a light source close to natural light (photon flux ratio: R / FR = 1) or to have an optimal light distribution ratio condition for plant growth.

In general, the blue LED alone does not produce a wavelength of 680nm range required for plant photosynthesis, so the actual plant factory uses a combination of blue, white, and red LEDs at an appropriate ratio to use as a light source for artificial photosynthesis of plants.

In this case, lifetime or luminous efficiency is increased, but there are disadvantages in terms of cost.

Therefore, the artificial light source for artificial photosynthesis of the plant according to the embodiment of the present invention uses only one light source so that two wavelengths required for plant photosynthesis can be simultaneously irradiated with a wavelength in the range of 440 nm and a wavelength in the 680 nm range. The invention seeks to improve economics by drastically reducing power.

Artificial light source for artificial photosynthesis of plants according to an embodiment of the present invention, referring to Figure 5, includes a blue LED light source 10 and a red phosphor 20.

A red fluorescent substance emitting a wavelength of 600 nm to 700 nm is applied to a blue LED light source emitting a wavelength of 440 nm.

When the light source is supplied with light and emits light, the color of the irradiated light source is pink.

In this case, the pink color irradiated from the light source generates 440 nm wavelength and 680 nm wavelength at the same time as shown in FIGS. 6A and 6B as shown in FIGS. 6A and 6B.

In addition, as shown in the color coordinate of Figure 7 it can be seen that blue or purple and red appear at the same time.

8 is an image photographing the light emitted from the pink LED light source manufactured according to an embodiment of the present invention. As shown in FIG. 8, the light source coated with the red fluorescent substance on the blue LED according to the exemplary embodiment of the present invention can be seen that emits pink light.

Meanwhile, M ₂ Si ₅ N _8: Eu ²⁺ may be used as the red phosphor. M may be any one of Ca, Sr, and Ba.

M ₂ Si ₅ N _8: Eu ²⁺ (M = Ca, Sr, Ba) is a red phosphor and it can be seen that it has a peak wavelength in the range of about 650 nm on the luminescence spectra shown in FIG. 9.

CaAlSiN _3: Eu ²⁺ Also, as a red phosphor, as shown in FIG. 10, since it has a peak wavelength in the range of about 650 nm, a red phosphor capable of applying the blue LED of the present invention can be used.

As a red phosphor, it can be seen that 6MgO · As ₂ O ₅ : Mn ⁴⁺ , 3.5MgO · 0.5MgF ₂ · GeO ₂ : Mn ⁴⁺ also has a peak wavelength in the range of about 650 nm as shown in FIGS. 11 and 12. There can be used a red fluorescent material that can be applied to the blue LED of the present invention.

Furthermore, according to another embodiment of the present invention, the artificial light source for artificial photosynthesis of plants may be formed by applying a red phosphor and a green phosphor to a blue LED light source. In this case, the red phosphor and the green phosphor may be mixed in a predetermined ratio and applied to the blue LED light source.

For example, according to this embodiment, the red phosphor and the green phosphor may be mixed at a weight ratio of about 6: 4 and applied to the blue LED light source.

As a result, the artificial light source according to the embodiment of the present invention can supply the light required for photosynthesis to the plant by irradiating blue light or violet light, green light and red light together.

In this embodiment, the green phosphor may be prepared by doping the parent crystal BaMoO ₄ with the activator ion Tb ³⁺ having different concentrations. Specifically, the method for producing the green fluorescent material is as follows.

To prepare the green phosphor, BaMoO ₄ : Tb ³⁺ phosphor was synthesized using a solid phase reaction method. The stoichiometric materials BaCO ₃ (purity: 99.995%), MoO ₃ (99.9%) and Tb ₄ O ₇ (99.9%) were prepared stoichiometrically, and the concentrations of Tb ³⁺ ions ( x ) were 0, 1, and 5, respectively. , 10, 15 and 20 mol%, and the chemical reaction is as follows:

(1-1.5x) BaCO ₃ + MoO ₃ + 0.25xTb ₄ O ₇ → Ba _1-1.5x MoO ₄ : xTb + (1-1.5x) CO ₂ + 0.125O ₂

The initial material measured by the precision balance was separated by concentration, put into a plastic bottle with ethanol and ZrO ₂ balls, and then ball-milled for 10 hours, and then placed in a beaker for 10 hours at 60 ° C. After drying, the dried sample was ground to a fine size of 80 μm and placed in 6 alumina crucibles, and synthesized through a calcination process at 400 ° C. for 3 hours and a sintering process at 1100 ° C. for 5 hours.

Furthermore, according to another embodiment of the present invention, the artificial light source for artificial photosynthesis of plants may be formed by applying a yellow fluorescent material to the blue LED light source.

In this case, the yellow fluorescent material may be at least one of a silicate-based, garnet-based yag (YAG), and an oxynitride-based fluorescent material. The yellow phosphor may be a phosphor selected from Y ₃ Al ₅ O ₁₂ : Ce ³⁺ (Ce: YAG), CaAlSiN ₃ : Ce ³⁺ , Eu ²⁺ -SiAlON series, a BOSE series, or a mixture thereof. have. The yellow phosphor may also be doped to any suitable level to provide light output of the desired wavelength. At least one of Ce and Eu may be doped into the fluorescent material at a dopant concentration in the range of about 0.1 to about 20%.

FIG. 13 is a configuration diagram of an ultraviolet light generating device constituting an energy self-supporting cultivation device according to an embodiment of the present invention. 4 and 13, the ultraviolet light generator 190 includes an ultraviolet light emitter 192, an ultraviolet light generator 194, and a measurement unit 196.

The ultraviolet irradiation unit 192 irradiates the ultraviolet rays transmitted through the second optical fiber tube 180 to the root 12 of the crop 1 to prevent mold. The ultraviolet generator 194 generates ultraviolet light and irradiates the root 12 portion of the crop 1 when the intensity of ultraviolet light supplied through the second optical fiber tube 180 is not sufficient to prevent root fungus.

The measuring unit 196 measures the amount of ultraviolet light transmitted through the second optical fiber tube 180. For example, the measuring unit 196 branches a portion of the ultraviolet light transmitted through the second optical fiber tube 180 by the optical coupler and measures the amount of light, thereby transmitting the ultraviolet light transmitted from the second optical fiber tube 180 through the second optical fiber tube 180. The amount of light can be measured.

The ultraviolet generator 194 compares the amount of ultraviolet light measured by the measuring unit 196 with a reference light amount, and when the measured amount of ultraviolet light is less than the reference light amount, the ultraviolet light generator 194 is proportional to the difference value (reference light amount-ultraviolet light amount). Ultraviolet light may be generated and irradiated to the root 12 portion of the crop 1.

According to this embodiment, by using the ultraviolet rays separated by the optical splitter 150 for the purpose of sterilization of the root of the crop, to prevent mold from growing to the root of the crop by using natural light to reduce the cost for UV supply Can prevent root fungus without using pesticides. In addition, by controlling the ultraviolet light supply amount of the ultraviolet generator 194 according to the amount of natural light (ultraviolet), it is possible to prevent root fungus efficiently and economically.

14 is a cross-sectional view of a light collecting plate constituting an energy self-supporting cultivation apparatus according to another embodiment of the present invention. 15 is a plan view of a light collecting plate constituting the energy self-supporting cultivation apparatus according to another embodiment of the present invention. 16 is a cross-sectional view showing an operating state of the light collecting plate constituting the energy self-supporting cultivation apparatus according to another embodiment of the present invention.

The energy self-supporting cultivation apparatus according to the embodiments of FIGS. 14 and 15 includes a sensing unit including a plurality of thermoelectric elements 144a-d embedded along the circumferential direction of the light collecting plate 140, and a plurality of thermoelectric elements 144a-d. The driving unit 146 adjusts the direction (angle) of the light collecting plate 140 according to the electrical signal generated by the sensing unit according to the temperature difference of).

The sensing unit generates an electrical signal according to the temperature difference of the plurality of thermoelectric elements 144a-d. In an embodiment, the sensing unit may include first pairs of thermoelectric elements 144a-b provided at both sides of the light collecting plate 140 along the first direction X, and a second direction Y perpendicular to the first direction X. FIG. ) Includes second pairs of thermoelectric elements 144c-d provided at both sides of the light collecting plate 140.

In an embodiment, the driving unit 146 may include a first driving device 146a for rotating the light collecting plate 140 in the first direction X according to the temperature difference between the first thermoelectric element pairs 144a-b, and the second driving device 146a. The second driving device 146b may rotate the light collecting plate 140 in the second direction Y according to the temperature difference between the thermoelectric element pairs 144c-d.

For example, when the light collecting plate 140 is inclined as shown in FIG. 14 with respect to natural light SL incident from the sun, the light is incident toward the second thermoelectric element 144b of the first pair of thermoelectric elements 144a-b. Natural light is reduced, and the amount of light per unit area of natural light incident to the first thermoelectric element 144a is increased. Accordingly, a temperature difference occurs between the first thermoelectric element 144a and the second thermoelectric element 144b, and an electrical signal is generated according to the temperature difference.

The driver 146 rotates the light collecting plate 140 according to an electric signal generated according to the temperature difference between the thermoelectric elements 144a-b and 144c-d. In the case of FIG. 14, the first driving device 146a rotates the light collecting plate 140 clockwise in the first direction X as shown in FIG. 16 to adjust the direction (angle) of the light collecting plate 140. Accordingly, the opening surface of the light collecting plate 140 may be disposed in a direction perpendicular to the natural light SL, thereby efficiently collecting the natural light SL.

According to this embodiment, by introducing thermoelectric elements by using the shape and characteristics of the light collecting plate for collecting the natural light, it is possible to adjust the direction (angle) of the light collecting plate using the natural light, and to collect the natural light at low cost The efficiency can be improved. 15 illustrates an example of driving the light collecting plate 140 using four thermoelectric elements, but the number and arrangement of the thermoelectric elements may be variously modified.

The above embodiments are presented to aid the understanding of the present invention, and do not limit the scope of the present invention, from which it should be understood that various modifications are within the scope of the present invention. The technical protection scope of the present invention should be determined by the technical spirit of the claims, and the technical protection scope of the present invention is not limited to the literary description of the claims, but is a category in which technical values are substantially equal. It should be understood that the invention extends to the invention.

1: crop
10: blue LED
12: root
20: red phosphor
100: energy independent growing device
110: body
120: grower
122, 124, 126, 128: cultivation unit
122a: planting framework
122b: support member
122c: supply
122d: drain
130: solar power plate
132: lighting device
140: light collecting plate
142: floodlight
144a-d: thermoelectric element
146: drive unit
146a: first drive device
146b: second drive unit
150: optical splitter
152: beam splitter
160: optical fiber
170: first optical fiber tube
172: auxiliary lighting device
174: Floodlight
180: second optical fiber tube
190: UV generator
192: ultraviolet irradiation unit
194: UV generator
196: measuring unit

Claims (11)

A cultivation unit in which at least one cultivation unit for cultivating crops is arranged in layers;
Solar power plate for converting solar energy into electrical energy;
An illumination device that illuminates artificial light on the crop being grown in the cultivation unit by using the electric energy converted by the solar power plate;
At least one light collecting plate having a concave curved shape to collect natural light;
An optical fiber member for transmitting natural light collected by the light collecting plate to the cultivation unit;
An auxiliary lighting device for irradiating the crop under cultivation with natural light transmitted through the optical fiber member;
An optical splitter for distributing the natural light collected by the light collecting plate into ultraviolet rays and non-ultraviolet rays; And
Ultraviolet light generating device for preventing mold from growing on the root of the crop by irradiating ultraviolet rays to the root portion of the crop;
The lighting device comprises: a pink LED light source that simultaneously illuminates blue and red light,
The cultivation unit,
Rearrangement;
A support member inserted into a hole formed in the cultivation frame to support the crop; And
It is provided at the bottom of the cultivation frame and includes a supply for supplying water and nutrients to the root portion of the crop,
The auxiliary lighting device irradiates the crops with natural light transmitted through the optical fiber member at the top of the rearrangement,
The ultraviolet generating device is provided at the bottom of the rearrangement,
The optical fiber member,
A first optical fiber tube for transmitting the non-ultraviolet rays distributed by the optical splitter to the auxiliary lighting device; And
And a second optical fiber tube for delivering the ultraviolet rays distributed by the optical splitter to the ultraviolet ray generating device.
The ultraviolet generator,
And an ultraviolet radiation unit for irradiating ultraviolet rays transmitted through the second optical fiber tube to the root portion of the crop. The method of claim 1,
The pink LED light source is:
Energy-independent cultivation apparatus coated with a red fluorescent substance to generate a light corresponding to a wavelength of 600 to 700 nm to a blue LED light source. The method of claim 2,
The red phosphor is M ₂ Si ₅ N _8: Eu ²⁺ (M = Ca, Sr, Ba), CaAlSiN _3: Eu ²⁺ , 6MgO · As ₂ O ₅ : Mn ⁴⁺ , 3.5MgO.0.5MgF _2. An energy self-supporting cultivation device of at least one of GeO ₂ : Mn ⁴⁺ . The method of claim 1,
The pink LED light source is:
An energy self-supporting cultivation apparatus that simultaneously provides blue light corresponding to a wavelength of 440 nm and red light corresponding to a wavelength of 680 nm. A cultivation unit in which at least one cultivation unit for cultivating crops is arranged in layers;
Solar power plate for converting solar energy into electrical energy;
An illumination device that illuminates artificial light on the crop being grown in the cultivation unit by using the electric energy converted by the solar power plate;
At least one light collecting plate having a concave curved shape to collect natural light;
An optical fiber member for transmitting natural light collected by the light collecting plate to the cultivation unit;
An auxiliary lighting device for irradiating the crop under cultivation with natural light transmitted through the optical fiber member;
An optical splitter for distributing the natural light collected by the light collecting plate into ultraviolet rays and non-ultraviolet rays; And
Ultraviolet light generating device for preventing mold from growing on the root of the crop by irradiating ultraviolet rays to the root portion of the crop;
The lighting device is:
White LEDs that provide white light; And
Includes a red LED providing red light,
The cultivation unit,
Rearrangement;
A support member inserted into a hole formed in the cultivation frame to support the crop; And
It is provided at the bottom of the cultivation frame and includes a supply for supplying water and nutrients to the root portion of the crop,
The auxiliary lighting device irradiates the crops with natural light transmitted through the optical fiber member at the top of the rearrangement,
The ultraviolet generating device is provided at the bottom of the rearrangement,
The optical fiber member,
A first optical fiber tube for transmitting the non-ultraviolet rays distributed by the optical splitter to the auxiliary lighting device; And
And a second optical fiber tube for delivering the ultraviolet rays distributed by the optical splitter to the ultraviolet ray generating device.
The ultraviolet generator,
And an ultraviolet radiation unit for irradiating ultraviolet rays transmitted through the second optical fiber tube to the root portion of the crop. A cultivation unit in which at least one cultivation unit for cultivating crops is arranged in layers;
Solar power plate for converting solar energy into electrical energy;
An illumination device that illuminates artificial light on the crop being grown in the cultivation unit by using the electric energy converted by the solar power plate;
At least one light collecting plate having a concave curved shape to collect natural light;
An optical fiber member for transmitting natural light collected by the light collecting plate to the cultivation unit;
An auxiliary lighting device for irradiating the crop under cultivation with natural light transmitted through the optical fiber member;
An optical splitter for distributing the natural light collected by the light collecting plate into ultraviolet rays and non-ultraviolet rays; And
Ultraviolet light generating device for preventing mold from growing on the root of the crop by irradiating ultraviolet rays to the root portion of the crop;
The lighting device comprises: an artificial LED light source for illuminating blue light and yellow light at the same time,
The cultivation unit,
Rearrangement;
A support member inserted into a hole formed in the cultivation frame to support the crop; And
It is provided at the bottom of the cultivation frame and includes a supply for supplying water and nutrients to the root portion of the crop,
The auxiliary lighting device irradiates the crops with natural light transmitted through the optical fiber member at the top of the rearrangement,
The ultraviolet generating device is provided at the bottom of the rearrangement,
The optical fiber member,
A first optical fiber tube for transmitting the non-ultraviolet rays distributed by the optical splitter to the auxiliary lighting device; And
And a second optical fiber tube for delivering the ultraviolet rays distributed by the optical splitter to the ultraviolet ray generating device.
The ultraviolet generator,
And an ultraviolet radiation unit for irradiating ultraviolet rays transmitted through the second optical fiber tube to the root portion of the crop. The method according to any one of claims 1, 5 and 6,
The ultraviolet generating device,
A measuring unit measuring the amount of ultraviolet light transmitted through the second optical fiber tube; And
An ultraviolet generator for generating ultraviolet light according to the amount of ultraviolet light and irradiating the root portion of the crop;
Energy self-supporting cultivation device further comprising. The method according to any one of claims 1, 5 and 6,
The optical splitter,
A beam splitter that transmits any one of ultraviolet rays and non-ultraviolet rays of the natural light and reflects the other one;
Energy self-supporting cultivation apparatus comprising a. The method according to any one of claims 1, 5 and 6,
And the first optical fiber tube and the second optical fiber tube include at least one optocoupler for distributing the natural light such that uniform natural light is transmitted to the cultivation unit of a plurality of layers. The method according to any one of claims 1, 5 and 6,
A sensing unit including a plurality of thermoelectric elements provided along a circumferential direction of the light collecting plate and generating an electrical signal according to a temperature difference of the plurality of thermoelectric elements; And
A driver configured to adjust a direction of the light collecting plate according to an electric signal generated by the detector;
Energy self-supporting cultivation device further comprising. The method of claim 10,
The detection unit,
First pairs of thermoelectric elements provided on both sides of the light collecting plate along a first direction; And
Second pairs of thermoelectric elements provided on both sides of the light collecting plate along a second direction perpendicular to the first direction;
Including,
The driving unit,
A first driving device to rotate the light collecting plate in the first direction according to a temperature difference between the first thermoelectric element pairs; And
A second driving device to rotate the light collecting plate in the second direction according to a temperature difference between the pair of second thermoelectric elements;
Energy self-supporting cultivation apparatus comprising a.

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