LED lighting device, cultivation shed and cultivation method

Abstract

Even if a reflector is not provided on the side of the shelf, light will not leak out of the LED lighting device. The device comprises: an LED array (30a) comprising a plurality of LED packages (30c) arranged in a manner with intervals in the longitudinal direction in an arrangement area of ​​a predetermined width extending in the longitudinal direction; and a reflector unit (60) which is a light irradiation direction changing member arranged in at least a few intervals in at least a predetermined range from at least one end of the LED array (30a) so as to change the irradiation direction of light from the LED package (30c) from the end side of the LED array (30a) to the central part side of the LED array (30a), wherein the reflector unit (60) comprises a reflector (60b) arranged locally around the LED package (30c).

Description

Technical Field

[0001] The invention relates to an LED lighting device, a cultivation shed and a cultivation method. Background Art

[0002] In a plant factory, artificial light is installed in a cultivation shed, and plants are cultivated in the shed. The following structure is used: lighting is installed in the upper part of the shed, and hydroponic cultivation equipment is installed in the lower part of the shed.

[0003] The lighting of the shed mainly illuminates the shed, but light also leaks out of the shed. Therefore, for example, as in Patent Document 1, a reflector is provided on the side of the shed to reflect the light leaking outward to the inside for effective use.

[0004] However, the method of Patent Document 1 has the following problems: the shed blocks the inflow and outflow of air, the humidity in the shed increases, and the growth of plants is inhibited. In addition, due to the presence of the reflector, it is difficult to observe and trim the cultivated objects inside the shed. In addition, the large number of reflectors needs to be replaced and cleaned regularly, and maintenance is also time-consuming.

[0005] On the other hand, for example, as in Patent Document 2, a measure is taken in which a reflector is provided in LED lighting to limit the irradiation area.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2018-61442

[0009] Patent Document 2: Japanese Patent Application Publication No. 2018-10748 Summary of the invention

[0010] Problem that the invention aims to solve

[0011] However, the main purpose of Patent Document 2 is to suppress changes in light distribution characteristics caused by strain of the reflector due to thermal stress, and the method of Patent Document 2 does not take measures to illuminate the area near the LED lighting and prevent the light from leaking outside the shed.

[0012] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an LED lighting device, a cultivation shed, and a cultivation method that can prevent light from leaking outside the LED lighting device even if a reflection plate is not provided on the side of the shed.

[0013] Solutions for solving problems

[0014] A technical solution of the LED lighting device of the present invention comprises: an LED column, which includes a plurality of LED packages arranged in a configuration area of ​​a specified width extending along the length direction in a manner with intervals in the length direction; and a light irradiation direction changing component, which is arranged in at least several of the above-mentioned intervals in at least a specified range from at least one end of the LED column, so that the irradiation direction of light from the LED package is changed from the end side of the LED column to the central side of the LED column, and the light irradiation direction changing component has a reflection plate, which is arranged locally around the LED package.

[0015] According to the LED lighting device, even if a reflective plate is not provided on the side of the cultivation shed, it is possible to prevent light from leaking out of the LED lighting device.

[0016] A technical solution of the cultivation shed of the present invention comprises: a rectangular frame unit, which has a rectangular upper frame, a lower frame of the same shape as the upper frame, and a plurality of pillars connecting the four corners of the upper frame and the four corners of the lower frame; a cultivation area portion, which is arranged in the lower frame; and an LED lighting device of the above technical solution, which is installed at multiple locations between the long sides of the upper frame in a manner approximately perpendicular to the long sides of the upper frame.

[0017] According to the cultivation shed, even if a reflection plate is not provided on the side of the cultivation shed, it is possible to prevent light from leaking out of the LED lighting device.

[0018] One aspect of the cultivation method of the present invention is a cultivation method using the cultivation shed of the above aspect, wherein the cultivation objects planted in the cultivation area are irradiated with light by an LED lighting device to cultivate the cultivation objects.

[0019] According to the above cultivation method, even if a reflective plate is not provided on the side of the cultivation shed, it is possible to prevent light from leaking outside the LED lighting device.

[0020] Effects of the Invention

[0021] According to the present invention, even if a reflective plate is not provided on the side of the cultivation shed, light can be prevented from leaking outside the LED lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a diagram showing a schematic structure of a cultivation shed according to one embodiment of the present invention.

[0023] Figure 2 This is a diagram showing a schematic structure of a cultivation frame according to one embodiment of the present invention.

[0024] Figure 3A This is a view of the cultivation shed viewed from the short side of the upper frame of the cultivation rack frame in the long side direction.

[0025] Figure 3B This is a diagram obtained by viewing the cultivation shed from the long side of the upper frame of the cultivation rack frame in the short side direction.

[0026] Figure 4A This is a diagram obtained by viewing the LED array in the long-side direction from the short-side side of the upper frame of the cultivation frame.

[0027] Figure 4B This is a diagram obtained by observing the LED array from the cultivation bed side.

[0028] Figure 4C This is a diagram obtained by viewing the LED array and the reflective plate unit from the short side of the upper frame of the cultivation frame in the long side direction.

[0029] Figure 4D This is a diagram of an LED lighting device in which an LED array and a reflective plate unit are combined, viewed from the short side of the upper frame of the cultivation frame in the long side direction.

[0030] Figure 4E This is a diagram of an LED lighting device in which an LED array and a reflector unit are combined, viewed from the cultivation bed side.

[0031] Figure 5A It is a perspective view of the reflection plate unit.

[0032] Figure 5B This is a diagram obtained by viewing the reflection plate unit from the short side of the upper frame of the cultivation frame in the long side direction.

[0033] Fig. 6A It is a perspective view of another type of reflector unit.

[0034] Figure 6B This is a diagram of another type of reflecting plate unit viewed from the short side of the upper frame of the cultivation frame in the long side direction.

[0035] Fig. 7A This is a diagram showing an example in which a reflector is arranged near an LED package and the size of the reflector is small.

[0036] Figure 7B This is a diagram showing an example in which the reflecting plate is arranged away from the LED package and the size of the reflecting plate is large.

[0037] Fig. 8A This is a diagram showing the results of simulating the light distribution of an LED package in a state where no reflector is provided.

[0038] Figure 8B It is a diagram for explaining the angle formed between the reflective plate and the substrate as the placement surface.

[0039] Fig.9AIt is a diagram showing the simulation results when the angle θ of the reflector is 90 degrees.

[0040] Fig. 9B It is a diagram showing the simulation results when the angle θ of the reflector is 110 degrees.

[0041] Fig. 10A It is a graph showing the relative strength when the deformation angle is 70 degrees.

[0042] Fig. 10B It is a graph showing the relative strength when the deformation angle is 90 degrees.

[0043] Fig. 10C It is a graph showing the relative strength when the deformation angle is 90 degrees.

[0044] Fig.11 This is a diagram showing an LED lighting device provided with a refractive lens as an example of a light irradiation direction changing member.

[0045] Fig. 12A It is a diagram showing a first modification example of arrangement of LED packages.

[0046] Fig. 12B It is a diagram showing a second modification of the arrangement of the LED packages.

[0047] Fig. 12C It is a diagram showing a third modification example of arrangement of LED packages.

[0048] Fig.12D It is a diagram showing a fourth modified example of arrangement of LED packages.

[0049] Fig.12E It is a diagram showing a fifth modification of the arrangement of LED packages.

[0050] Fig.13A It is a diagram showing a first modified example of arrangement of the reflection plates.

[0051] Fig. 13B It is a diagram showing a second modified example of the arrangement of the reflection plates.

[0052] Fig. 13C It is a diagram showing a third modified example of the arrangement of the reflection plates.

[0053] Fig.13D It is a diagram showing a fourth modified example of the arrangement of the reflection plate.

[0054] Fig.14 It is a diagram for explaining the shape of a reflector according to a modified example. DETAILED DESCRIPTION

[0055] Hereinafter, one embodiment of the present invention (hereinafter, referred to as the present embodiment) will be described in detail with reference to the drawings. Figure 1 1 is a diagram showing a general structure of a cultivation shed 100 according to this embodiment. Figure 1 As shown, the cultivation shed 100 includes a cultivation frame 10 as a frame unit, a cultivation bed 20 as a cultivation area portion, and an LED lighting device 30 .

[0056] Figure 2 1 is a diagram showing a general structure of the cultivation frame 10 of this embodiment. Figure 2 As shown, the cultivation rack frame 10 is a rectangular parallelepiped frame unit having a rectangular upper frame 10a, a lower frame 10b having the same shape as the upper frame 10a, and a plurality of support columns 10c connecting the four corners of the upper frame 10a and the four corners of the lower frame 10b. Figure 1 The cultivation shed 100 shown in the figure shows an example in which the cultivation frame 10 as described above is stacked in four layers.

[0057] As the material of the upper frame 10a, the lower frame 10b and the support 10c, for example, iron, aluminum and plastic can be cited. The long sides of the upper frame 10a and the lower frame 10b have a length of, for example, about 8m, and the short sides of the upper frame 10a and the lower frame 10b have a length of, for example, about 1.5m. The lengths of the long sides and short sides of the upper frame 10a and the lower frame 10b can be appropriately changed. In addition, the support 10c has a length of, for example, about 0.3m. The length of the support 10c can be appropriately changed. When the frame is made of metal, it is preferably plated to prevent corrosion caused by cultivation water, etc.

[0058] Moreover, when the cultivation frame 10 is used by stacking, the upper frame 10a of the cultivation frame 10 of the lower layer can also be used as the lower frame 10b of the cultivation frame 10 of the upper layer.

[0059] Figure 3A 1 is a diagram of the cultivation shed 100 viewed from the short sides of the upper frame 10a and the lower frame 10b of the cultivation frame 10 in the long side direction. Figure 3B This is a diagram of the cultivation shed 100 viewed from the long sides of the upper frame 10 a and the lower frame 10 b of the cultivation rack frame 10 in the short side direction.

[0060] like Figure 3A and Figure 3B As shown in FIG. 1 , the cultivation bed 20 is placed on the lower frame 10b of the cultivation frame 10. Figure 3A and Figure 3B As shown, the mounting fittings 40 of the LED lighting device 30 are mounted on the upper frame 10a of the cultivation frame 10. Figure 3A As shown, the mounting fittings 40 are mounted at, for example, four locations in the short side direction of the upper frame 10a of the cultivation frame 10. Figure 3B As shown, the mounting brackets 40 are mounted at, for example, two locations in the longitudinal direction of the upper frame 10 a of the cultivation frame 10 .

[0061] In addition, if Figure 3A As shown, for example, the effective cultivation dimension L defined by the distance from the mounting fitting 40 to which the LED lighting device 30 is mounted to the cultivation bed 20 is set to 295 mm.

[0062] In addition, the support column 10c of the cultivation frame 10 at the bottom layer is provided with an adjustment mechanism 50 capable of adjusting the height of the cultivation shed 100. Figure 3A and Figure 3B In the example shown, the upper frame 10a and the lower frame 10b of the cultivation rack frame 10 at the lowermost stage are omitted.

[0063] like Figure 1 As shown, the LED lighting devices 30 are installed at multiple locations between the long sides in a manner substantially perpendicular to the long sides of the upper frame 10a of the cultivation frame 10 (i.e., in a manner that the angle formed with the long sides is approximately 85 degrees to 95 degrees). In addition, the LED lighting devices 30 are installed substantially parallel to each other (including the case where the LED lighting devices 30 deviate from the parallel state in the range of approximately -15 degrees to 15 degrees, preferably in the range of approximately -10 degrees to 10 degrees, and more preferably in the range of approximately -5 degrees to 5 degrees).

[0064] Figure 4A This is a diagram of an LED array 30 a of an LED lighting device 30 according to the present embodiment viewed from the short side of an upper frame 10 a of a cultivation frame 10 in the long side direction. Figure 4B This is a diagram in which the LED array 30 a is viewed from the cultivation bed 20 side. Figure 4C This is a diagram in which the LED array 30 a of the LED lighting device 30 and the reflector unit 60 as a light irradiation direction changing member are viewed from the short side of the upper frame 10 a of the cultivation frame 10 in the long side direction. Figure 4D This is a diagram of the LED lighting device 30 in which the LED array 30 a and the reflection plate unit 60 are combined, viewed from the short side of the upper frame 10 a of the cultivation frame 10 in the long side direction. Figure 4E This is a diagram of the LED lighting device 30 in which the LED array 30 a and the reflector unit 60 are combined, viewed from the cultivation bed 20 side.

[0065] like Figure 4AAs shown, the LED array 30a is provided with a plurality of LED packages 30c arranged on a substrate 30b extending in the length direction so as to be spaced apart in the length direction of the substrate 30b. That is, in a configuration area of ​​a predetermined width extending in the length direction, the plurality of LED packages 30c are arranged so as to be spaced apart in the length direction of the configuration area. The spacing is set to, for example, 22 mm. The maximum value of the spacing between the LED packages 30c is less than 100 mm, preferably less than 50 mm, and particularly preferably less than 20 mm. For example, 128 LED packages 30c are arranged. However, the number of LED packages 30c in the LED array 30a can be appropriately changed.

[0066] The LED package 30c is classified into, for example, a red-blue type and a white type according to the light emission color of the LED. In addition, the width of one LED package 30c in the short side direction (the length direction of the substrate 30b) of the upper frame 10a of the cultivation frame 10 is, for example, about 2 to 3 mm. However, the width of the LED package 30c can be appropriately changed.

[0067] In this embodiment, if Figure 4A As shown, a predetermined range from one end 30d of the LED array 30a and a predetermined range from the other end 30d are referred to as end side regions. In addition, a region other than the end side region of the LED array 30a is referred to as a center side region.

[0068] In the present embodiment, a reflection plate unit 60 is arranged in the end side area of ​​the LED column 30a. The reflection plate unit 60 is arranged corresponding to each LED package 30c arranged in the end side area, and serves as a light irradiation direction changing component that changes the irradiation direction of light from the LED package 30c from the end 30d side of the LED column 30a to the central side of the LED column 30a.

[0069] like Figure 4C As shown in FIG. 1 , the base material 60a and the reflective plate 60b of the reflective plate unit 60 are formed as one body. Figure 4D As shown in FIG. 1 , such a reflector unit 60 is mounted on the LED array 30a. As a result, Figure 4E As shown in FIG. 1 , the reflector 60b is arranged in the interval formed by the arrangement of the LED package 30c. The reflector 60b is not the LED package 30c, nor is it equivalent to a component of the LED package 30c. In addition, as in the present embodiment, the reflector unit 60 is formed as a member independent of the LED array 30a and is mounted on the LED array 30a after being formed, thereby making it easy to manufacture the LED lighting device 30.

[0070] The reflector 60b may be made of any material as long as it has a high reflectivity. The reflectivity of the reflector 60b may be specular reflectivity or total reflectivity, and preferably has a low light absorption. In this embodiment, as an example, the reflectivity of the reflector 60b is 50% or more.

[0071] Examples of the material of the reflector 60b include oxides, plastics, and metals. Specifically, the following materials may be used alone or in the form of powder or the like and applied. Examples of materials include magnesium carbonate, barium sulfate, aluminum oxide, titanium oxide, zinc oxide, lithopone, lead white, gold, silver, copper, platinum, aluminum, nickel, tin, tungsten, chromium, paper, pulp, cloth, white paint, glass, and bricks. Among them, titanium oxide, zinc oxide, barium sulfate, magnesium carbonate, and aluminum are preferred.

[0072] The material of the reflector 60b is preferably a titanium oxide material. If this material is used, the reflectivity varies depending on the particle size and content, but a reflectivity of 70% or more can be achieved. In addition, when using materials such as silver, aluminum, and gold, a reflectivity of 70% or more can also be achieved.

[0073] For a predetermined number of reflecting plates 60b disposed near the end 30d of the LED array 30a, the angle between the arrangement surface of the reflecting plate 60b and the reflecting surface of the reflecting plate 60b is smaller than that of the remaining reflecting plates 60b.

[0074] Figure 5A is a perspective view of the reflection plate unit 60, Figure 5B 1 is a diagram obtained by viewing the reflector unit 60 from the short side of the upper frame 10a of the cultivation frame 10 in the long side direction. Figure 5A As shown in FIG. 1 , the base material 60a of the reflector unit 60 is provided with an opening 60c at a position between adjacent reflectors 60b. Figure 4C As shown, the LED package 30 c of the LED array 30 a is disposed in the opening 60 c , and the LED array 30 a and the reflection plate unit 60 are combined to form the LED lighting device 30 .

[0075] Fig. 6A is a three-dimensional diagram of another state of the reflection plate unit 60, Figure 6B 1 is a diagram obtained by viewing the reflector unit 60 from the short side of the upper frame 10a of the cultivation frame 10 in the long side direction. Fig. 6A and Figure 6B As shown, the reflective surface of the reflective plate 60b of the reflective plate unit 60 is not limited to a flat plate, but may be curved.

[0076] Fig. 7A3 is a diagram showing an example in which the reflection plate 60b is arranged near the LED package 30c and the size of the reflection plate 60b is small. Figure 7B This is a diagram showing an example in which the reflection plate 60b is arranged away from the LED package 30c and the size of the reflection plate 60b is large.

[0077] The width of the light-emitting surface of the LED package 30c in the short side direction of the upper frame 10a of the cultivation frame 10 is about 2 to 3 mm, and the light from the light-emitting surface is irradiated in a wide irradiation range. Figure 7B As shown in FIG. 1 , when the reflector 60b′ is disposed at a position far from the LED package 30c, it not only affects the light from a single LED package 30c, but also affects the light from other LED packages 30c. Figure 7B As shown, in this case, unless a large reflection plate 60b' is provided, reflection control cannot be performed effectively.

[0078] However, if Fig. 7A As shown in FIG. 1 , the reflector 60b is arranged in such a manner that the interval between the reflector 60b and the LED package 30c is 1 to 2 times the width of the LED package 30c, so that the light from other LED packages 30c is not affected. Therefore, in the case where the reflector 60b is arranged at the above-mentioned arrangement position, by making the height of the reflector 60b (the distance from the surface of the substrate 60a to the upper end of the reflector 60b) 2 to 3 times the width of the LED package 30c, reflection control can be effectively performed.

[0079] In this embodiment, as an example, an LED package 30c having a width of about 2 mm in the short side direction of the upper frame 10a of the cultivation frame 10 is used, and the position of the reflector 60b is set to be about 2 mm away from the center of the adjacent LED package 30c. In addition, the height of the reflector 60b from the configuration surface is set to about 5 mm.

[0080] Next, the effects of the reflection plate 60b will be described. Fig. 8A 1 and 2 are diagrams showing the results of simulating the light distribution of the LED package 30 c in a state where the reflector 60 b is not provided. Figure 8B It is a diagram for explaining the angle formed between the reflection plate 60b and the base material 60a as the arrangement surface.

[0081] Fig. 8A The example shown shows the result of simulating the diffusion of LED light using the LED package 30c arranged at the position of 0 mm, when the reference position is set to the position of 0 mm and the LED package 30c is arranged from the position of 0 mm to the position of 1200 mm. Fig. 8AAs shown in FIG. 1 , when the reflector 60b is not configured, the light emitted from the LED package 30c configured at the position of 0 mm will diffuse to the position of 1200 mm. Fig. 8A As shown, it can be seen that the light diffuses in the negative direction where no LED packages 30c are arranged.

[0082] If the LED package 30c arranged at the position of 0 mm is arranged near the end of the LED array 30a, light diffused in the negative direction leaks out of the cultivation shed 100, and LED light cannot be effectively used.

[0083] Here, if Figure 8B As shown, a case where a reflection plate 60b having a height of 5 mm and an angle θ of 90 degrees is provided at a position 2 mm away from the light-emitting point of the LED package 30c is considered. Fig.9A : is a diagram showing the simulation result when the angle θ of the reflector 60b is 90 degrees. Fig. 9B It is a diagram showing the simulation results when the angle θ is 110 degrees.

[0084] exist Fig.9A and Fig. 9B In FIG. 6 , the reflected light of the reflector 60b is depicted in a circular ring shape. Fig.9A As shown, when the angle θ of the reflector 60 b is 90 degrees, although the light is not irradiated in the negative direction, the light distribution in the illumination area directly below the LED package 30 c is reduced.

[0085] On the other hand, Fig. 9B As shown in FIG. 1 , when the angle θ of the reflector 60b is 110 degrees, the light is diffused only to the irradiation surface 300 mm away from the reflector 60b, and no light is irradiated outside about 100 mm from the light-emitting point. That is, by setting the angle θ of the reflector 60b to 110 degrees, it is possible to prevent the light from irradiating in the negative direction, and to ensure the light distribution in the illumination area directly below the LED package 30c.

[0086] In this embodiment, based on the results of the above-mentioned simulation, a reflective plate unit 60 is provided in the end area of ​​the LED array 30a to prevent light from leaking out of the outside of the cultivation shed 100, thereby achieving improvements in the uniformity of light distribution and light distribution efficiency (the proportion of the total light irradiated from the LED lighting device 30 that is irradiated to the effective area).

[0087] Fig. 10A is the angle of change ( Figure 8B The relative intensity diagram for the case where the angle θ) is 70 degrees is shown. Fig. 10B is a diagram showing the relative strength when the angle of change is 90 degrees. Fig. 10Cis a diagram showing the relative strength when the angle of change is 90 degrees. Figures 10A to 10C The relative intensity shown is obtained by calculation, and is the light intensity calculated assuming that the reflectivity of the reflector 60b is 80% of the specular reflectivity.

[0088] like Fig. 10A As shown, when the angle of change is 70 degrees, all the light from the LED package 30c is irradiated to the effective area of ​​0 mm to 1200 mm. As a result, the light distribution efficiency is improved from 80% to 96%.

[0089] In addition, if Fig. 10B As shown in the figure, when the angle is 90 degrees, the light distribution efficiency is improved from 80% to 91%. It can be seen that although the light distribution efficiency is worse than when the angle is 70 degrees, the uniformity of light distribution is improved.

[0090] In this embodiment, the angles of the reflectors 60b are adjusted one by one to achieve both maximum light quantity and uniform light distribution. Fig. 10C As shown, by adjusting the angles of the reflective plates 60 b one by one, the light distribution efficiency can be made 96% and the uniformity of the light distribution can be improved.

[0091] As described above, according to the present embodiment, a smaller reflector 60b is installed in the vicinity of the LED package 30c in the end side area corresponding to the LED package 30c. As a result, the light leaking out of the cultivation shed 100 can be returned to the cultivation shed 100, and the irradiation light from the LED package 30c can be effectively suppressed. In addition, by changing the angle of the reflector 60b according to the configuration position of the LED package 30c, the irradiation distribution in the cultivation shed 100 can be optimized.

[0092] In addition, for the cultivation shed 100 as described above, by using the LED lighting device 30 to irradiate light to the cultivated objects such as plants planted in the cultivation bed 20, the cultivated objects such as plants can be efficiently cultivated. The growth of plants is based on photosynthesis. By achieving more photosynthesis, the plant body becomes larger and the productivity is improved. In artificial light plant cultivation, increasing the amount of light is related to the increase in photosynthesis, and the result is an increase in productivity. The present invention irradiates the plant body with light that would not be irradiated to the plant body but would be thrown out of the shed, and as a result, the effect of improving productivity can be expected. In addition, as cultivated objects other than plants, mushrooms, fish, microorganisms, cells, etc. can be cited.

[0093] (Variation Example)

[0094] The above-described embodiments are merely examples, and various modifications may be made without departing from the spirit and scope of the present invention.

[0095] In the above-mentioned embodiment, the reflection plate unit 60 is used as an example of a light irradiation direction changing member, but the present invention is not limited to such a form. Fig.11 As shown, a refractive lens 70 as a light irradiation direction changing member may be provided corresponding to the LED package 30c in the end side region to collect the irradiation light from the LED package 30c to the center portion side.

[0096] In the above-mentioned embodiment, the angle of each reflector 60b is adjusted one by one, but the present invention is not limited to such an embodiment. For example, the angle of each reflector 60b may be uniform among the reflectors 60b.

[0097] The range for disposing the reflector 60b and the like can be set arbitrarily, but it is preferably disposed corresponding to at least six or more LED packages 30c counted from the end 30d of the LED array 30a. For example, in the case of the LED lighting device 30 in which the arrangement interval of the LED packages 30c is 20mm and the length of the LED array 30a is 1000mm, the reflector 60b and the like are disposed corresponding to at least six or more LED packages 30c. In this case, the light distribution of the LED packages 30c located within the range of 100mm from the end 30d is controlled. As a result, the light distribution is adjusted by more than 10% for distribution improvement, with 10% on one end side and 20% on both end sides, and a significant effect can be expected.

[0098] In the above-mentioned embodiment, the LED packages 30c are arranged in a row at a constant interval, but the present invention is not limited to such a state. Fig. 12A As shown, a plurality of LED packages 30c may be grouped together, and the interval between the LED packages 30c in the group may be set constant, and the interval between groups may be set larger than the interval between the LED packages 30c and constant.

[0099] In addition, if Fig. 12B As shown in FIG. 1 , the intervals between the LED packages 30c may not be constant. Fig. 12C As shown, the position of the LED package 30c in the short side direction of the substrate 30b may be different.

[0100] In addition, if Fig.12D As shown in FIG. 1 , the LED packages 30c may be arranged in multiple rows on the substrate 30b. Fig.12E As shown, a configuration in which a plurality of LED packages 30c are provided in the short-side direction of the base material 30b and a configuration in which a single LED package 30c is provided in the short-side direction of the base material 30b may be combined.

[0101] In the above-mentioned embodiment, the reflection plate 60b is arranged corresponding to each LED package 30c, but the present invention is not limited to such a state. Fig.13A and Fig. 13B As shown in FIG. 1 , multiple reflectors 60b may be omitted. Fig. 13C As shown in FIG. 1 , the reflector 60b may not be arranged at the position corresponding to the predetermined number of LED packages 30c counted from the end 30d. Fig.13D As shown, the reflecting plate 60 b may be arranged only on one end of the LED array 30 a instead of being arranged on both end sides of the LED array 30 a .

[0102] In the above-mentioned embodiment, the case where one reflector 60b acts on one LED package 30c is described. Fig.14 As shown, the reflector 60b can act on the LED packages 30c on both sides of the location where it is installed. In this case, it is preferable to set the reflector shape to change the light direction of the light on both sides of the reflector 60b.

[0103] In this specification, an LED lighting device according to one embodiment of the present invention is described, but the present invention is not limited thereto, and various changes can be made within the scope not departing from the gist of the present invention.

[0104] Description of Reference Numerals

[0105] 10. Cultivation frame; 10a. Upper frame; 10b. Lower frame; 10c. Pillar; 20. Cultivation bed; 30. LED lighting device; 30a. LED array; 30b. Base material; 30c. LED package; 30d. End; 40. Mounting accessories; 50. Adjustment mechanism; 60. Reflection plate unit; 60a. Base material; 60b. Reflection plate; 70. Refractive lens; 100. Cultivation shed.

Claims

1. An LED lighting device, characterized in that: The LED lighting device has: An LED array including a plurality of LED packages arranged in an arrangement region of a predetermined width extending in a longitudinal direction so as to be spaced apart in the longitudinal direction; as well as a light irradiation direction changing member, which is arranged in at least some of the intervals in at least a predetermined range from at least one end of the LED array, and does not change the irradiation direction of light irradiated from the LED package to the central portion side of the LED array to the end portion side of the LED array, but changes the irradiation direction of light irradiated from the LED package to the end portion side of the LED array to the central portion side of the LED array, The light irradiation direction changing member includes a reflection plate disposed at a portion around the LED package.

2. The LED lighting device according to claim 1, characterized in that: When viewed from each of the LED packages, the reflecting plate is arranged on an end side of the LED array, and the end side of the LED array serves as a starting point of the predetermined range in which the LED packages are arranged.

3. The LED lighting device according to claim 1, characterized in that: Each of the reflecting plates is arranged within the interval at a distance from the center of each of the LED packages that is 1 to 2 times the width of the LED package in the length direction, and a height of each of the reflecting plates from the arrangement surface is 2 to 3 times the width of the LED package.

4. The LED lighting device according to claim 1, characterized in that: An angle formed between the reflection surfaces of a predetermined number of the reflection plates disposed near the end of the LED array and the arrangement surface is smaller than an angle formed between the reflection surfaces of the remaining reflection plates and the arrangement surface.

5. The LED lighting device according to claim 1, characterized in that: The reflectivity of the reflection plate is greater than 50%.

6. The LED lighting device according to claim 1, characterized in that: The light irradiation direction changing member is a refractive lens provided so as to cover each of the LED packages.

7. The LED lighting device according to claim 1, characterized in that: The light irradiation direction changing member is arranged corresponding to at least six or more of the LED packages counted from the end of the LED array.

8. A cultivation shed, characterized in that: The cultivation shed has: A rectangular parallelepiped frame unit having a rectangular upper frame, a lower frame having the same shape as the upper frame, and a plurality of pillars connecting four corners of the upper frame and four corners of the lower frame; A cultivation area portion, which is arranged on the lower frame; as well as The LED lighting device according to claim 1 is installed at a plurality of locations between the long sides of the upper frame in a manner substantially perpendicular to the long sides of the upper frame.

9. The cultivation shed according to claim 8, characterized in that: The LED lighting devices are installed to be substantially parallel to each other.

10. A cultivation method using the cultivation shed according to claim 8 or 9, wherein: The LED lighting device irradiates the cultivated objects planted in the cultivation area with light to cultivate the cultivated objects.

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