阅读说明：本技术 Led照明装置、栽培棚以及栽培方法 (LED lighting device, cultivation shed and cultivation method ) 是由 北岛正裕 宇佐美由久 新田贵正 丸山高志 于 2020-03-25 设计创作，主要内容包括：即使不在棚的侧面设置反射板,光也不会向LED照明装置之外漏出。具有：LED列(30a),其包括在沿长度方向延伸的规定宽度的配置区域以在长度方向上具有间隔的方式配置的多个LED封装体(30c)；以及反射板单元(60),其是在自LED列(30a)的至少一个端部起的至少规定范围配置于上述间隔中的至少几个间隔内,使来自LED封装体(30c)的光的照射方向自LED列(30a)的端部侧向LED列(30a)的中央部侧变更的光照射方向变更构件,反射板单元(60)具有反射板(60b),该反射板配置于LED封装体(30c)的周围的局部。(Even if the reflecting plate is not provided on the side surface of the booth, light does not leak out of the LED lighting device. Comprising: an LED array (30a) including a plurality of LED packages (30c) arranged at intervals in the longitudinal direction in an arrangement region of a predetermined width extending in the longitudinal direction; and a reflection plate unit (60) which is a light irradiation direction changing member that is arranged in at least some of the above-mentioned intervals in at least a predetermined range from at least one end of the LED array (30a) and changes the irradiation direction of light from the LED package (30c) from the end side of the LED array (30a) to the center side of the LED array (30a), wherein the reflection plate unit (60) has a reflection plate (60b) that is arranged in a part of the periphery of the LED package (30 c).)

1. An LED lighting device is characterized in that,

the LED lighting device comprises:

an LED array including a plurality of LED packages arranged at intervals in a longitudinal direction in an arrangement region of a predetermined width extending in the longitudinal direction; and

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 changes the irradiation direction of the light from the LED package from the end of the LED array to the center of the LED array,

the light irradiation direction changing member includes a reflecting plate disposed in a part of the periphery of the LED package.

2. The LED lighting device according to claim 1,

the reflecting plate is disposed on an end portion side of the LED array when viewed from each of the LED packages, and the end portion side of the LED array serves as a starting point of the predetermined range in which the LED packages are disposed.

3. The LED lighting device according to claim 1 or 2,

the reflecting plates are disposed at positions spaced apart from the center of the LED packages by a distance of 1 to 2 times the width of the LED packages in the longitudinal direction, and the height of the reflecting plates from the disposition surface is 2 to 3 times the width of the LED packages.

4. The LED lighting device according to any one of claims 1 to 3,

of the reflective plates, a predetermined number of reflective plates provided at positions close to the ends of the LED rows have smaller angles with the arrangement surfaces than those of the remaining reflective plates.

5. The LED lighting device according to any one of claims 1 to 4,

the reflectivity of the reflecting plate is more than 50%.

6. The LED lighting device according to any one of claims 1 to 5,

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 any one of claims 1 to 6,

the light irradiation direction changing member is disposed corresponding to at least 6 or more of the LED packages from the end of the LED array.

8. A cultivation shed is characterized in that a shed body is provided,

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 support columns connecting four corners of the upper frame and four corners of the lower frame;

a cultivation area section provided in the lower frame; and

the LED lighting device according to any one of claims 1 to 7, wherein the LED lighting device is mounted at a plurality of positions between the long sides of the upper frame so as to be substantially perpendicular to the long sides.

9. The cultivation shed as claimed in claim 8,

the LED lighting devices are arranged to be approximately parallel to each other.

10. A cultivation method using the cultivation shed according to claim 8 or 9, wherein,

the LED lighting device irradiates light to a cultivated object planted in the cultivation area part to cultivate the cultivated object.

Technical Field

The invention relates to an LED lighting device, a cultivation shed and a cultivation method.

Background

In plant factories and the like, artificial light is illuminated in a cultivation booth, and plants are cultivated in the booth. The following structure is utilized: the upper part in the shed is provided with illumination, and the lower part in the shed is provided with hydroponic equipment.

The lighting of the shed mainly illuminates the shed, but light also leaks out of the shed. Therefore, for example, the following operations are performed as in patent document 1; the side of the shed is provided with a reflecting plate, so that the light leaking out is reflected towards the inside and is effectively utilized.

However, the method of patent document 1 has the following problems: the greenhouse obstructs the air from entering and exiting, the humidity in the greenhouse rises, and the growth of plants is inhibited. In addition, due to the presence of the reflective plate, it is difficult to observe and trim the cultivation inside the shed. In addition, many reflection plates need to be replaced and cleaned periodically, and maintenance is time-consuming.

On the other hand, as in patent document 2, for example, a reflecting plate is provided in the LED lighting to limit the irradiation area.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-61442

Patent document 2: japanese patent laid-open publication No. 2018-10748

Disclosure of Invention

Problems to be solved by the invention

However, the main purpose of patent document 2 is to suppress the change in the light distribution characteristics due to the strain of the reflector caused by the thermal stress, and the method of patent document 2 does not take a measure to make the light go through the near irradiation region of the LED lighting and prevent the light from leaking outside the housing.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an LED lighting device, a cultivation greenhouse, and a cultivation method, which can prevent light from leaking to the outside of the LED lighting device without providing a reflection plate on a side surface of the greenhouse.

Means for solving the problems

One aspect of the LED lighting device of the present invention includes: an LED array including a plurality of LED packages arranged at intervals in a longitudinal direction in an arrangement region of a predetermined width extending in the longitudinal direction; and a light irradiation direction changing member which is arranged in at least some of the intervals within at least a predetermined range from at least one end of the LED array, and changes the irradiation direction of the light from the LED package from the end of the LED array to the center of the LED array.

With the LED lighting device, light can be prevented from leaking out of the LED lighting device even if a reflecting plate is not arranged on the side surface of the cultivation shed.

The technical scheme of the cultivation shed of the invention comprises the following steps: 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 support columns connecting four corners of the upper frame and four corners of the lower frame; a cultivation area part arranged on the lower frame; and an LED lighting device according to the above-described aspect, which is arranged at a plurality of positions between the long sides of the upper frame so as to be substantially perpendicular to the long sides.

With the cultivation shed, light can be prevented from leaking out of the LED illumination device even if no reflector is arranged on the side surface of the cultivation shed.

One aspect of the cultivation method according to the present invention is a cultivation method using the above-described cultivation shed, wherein the cultivation area portion is irradiated with light by the LED illumination device to cultivate the object to be cultivated.

With the above-described cultivation method, light can be prevented from leaking out of the LED lighting device without providing a reflector on the side surface of the cultivation shed.

ADVANTAGEOUS EFFECTS OF INVENTION

The invention can prevent light from leaking to the outside of the LED illumination even if no reflecting plate is arranged on the side surface of the cultivation shed.

Drawings

Fig. 1 is a diagram showing a schematic structure of a cultivation booth according to an embodiment of the present invention.

Fig. 2 is a view showing a schematic configuration of a cultivation shelf frame according to an embodiment of the present invention.

Fig. 3A is a view of the cultivation shelf seen from the short side of the upper frame of the cultivation shelf frame in the longitudinal direction.

FIG. 3B is a view of the cultivation shed as viewed from the long side of the upper frame of the cultivation frame in the short side direction.

Fig. 4A is a view of the LED array viewed from the short side of the upper frame of the cultivation shelf frame in the longitudinal direction.

FIG. 4B is a view of the LED row as viewed from the side of the cultivation bed.

Fig. 4C is a view of the LED array and the reflector unit viewed from the short side of the upper frame of the cultivation shelf frame in the longitudinal direction.

Fig. 4D is a view of the LED lighting device in which the LED array and the reflector unit are combined, as viewed from the short side of the upper frame of the cultivation shelf frame in the longitudinal direction.

Fig. 4E is a view of the LED lighting device in which the LED array and the reflector plate unit are combined, as viewed from the side of the cultivation bed.

Fig. 5A is a perspective view of the reflection plate unit.

Fig. 5B is a view of the reflector unit viewed from the short side of the upper frame of the cultivation shelf frame in the longitudinal direction.

Fig. 6A is a perspective view of another example of the reflection plate unit.

Fig. 6B is a view of the reflector unit in another form viewed from the short side of the upper frame of the cultivation shelf frame in the longitudinal direction.

Fig. 7A is a diagram showing an example in which the reflection plate is disposed in the vicinity of the LED package and the size of the reflection plate is small.

Fig. 7B is a diagram showing an example in which the reflection plate is disposed apart from the LED package and the size of the reflection plate is large.

Fig. 8A is a graph showing a result of simulating a light distribution of an LED package in a state where no reflector is provided.

Fig. 8B is a view illustrating an angle formed between the reflection plate and the base material as the disposition surface.

Fig. 9A is a diagram showing a simulation result in a case where the angle θ of the reflector is 90 degrees.

Fig. 9B is a diagram showing a simulation result in a case where the angle θ of the reflector is 110 degrees.

Fig. 10A is a graph showing the relative strength when the angle of change is 70 degrees.

Fig. 10B is a graph showing the relative intensity in the case where the angle of change is 90 degrees.

Fig. 10C is a graph showing the relative strength when the angle of change is 90 degrees.

Fig. 11 is a view showing an LED lighting device provided with a refractive lens as an example of a light irradiation direction changing member.

Fig. 12A is a view showing a 1 st modification of the arrangement of the LED package.

Fig. 12B is a view showing a 2 nd modification of the arrangement of the LED package.

Fig. 12C is a view showing a 3 rd modification of the arrangement of the LED package.

Fig. 12D is a view showing a 4 th modification of the arrangement of the LED package.

Fig. 12E is a view showing a 5 th modification of the arrangement of the LED package.

Fig. 13A is a view showing a 1 st modification of the arrangement of the reflection plate.

Fig. 13B is a view showing a 2 nd modification of the arrangement of the reflection plate.

Fig. 13C is a view showing a 3 rd modification of the arrangement of the reflection plate.

Fig. 13D is a view showing a 4 th modification of the arrangement of the reflection plates.

Fig. 14 is a diagram for explaining the shape of the reflecting plate according to a modification.

Detailed Description

Hereinafter, one embodiment (hereinafter, the present embodiment) of the present invention will be described in detail with reference to the drawings. Fig. 1 is a diagram showing a schematic structure of a cultivation booth 100 according to the present embodiment. As shown in fig. 1, the cultivation booth 100 includes a cultivation rack frame 10 as a frame unit, a cultivation bed 20 as a cultivation area section, and an LED illumination device 30.

Fig. 2 is a diagram showing a schematic configuration of the cultivation shelf frame 10 according to the present embodiment. As shown in fig. 2, the cultivation shelf 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 four corners of the upper frame 10a and four corners of the lower frame 10 b. The cultivation booth 100 shown in fig. 1 is an example in which four layers of the cultivation frame frames 10 are stacked.

Examples of the material of the upper frame 10a, the lower frame 10b, and the support column 10c include iron, aluminum, and plastic. 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 1.5 m. The lengths of the long side and the short side of the upper frame 10a and the lower frame 10b can be changed as appropriate. The support column 10c has a length of, for example, about 0.3 m. The length of the support post 10c can be changed as appropriate. When a metal is used for the frame, it is preferable to perform plating in order to prevent corrosion due to culture water or the like.

In addition, when the cultivation frame frames 10 are used in a stacked manner, the upper frame 10a of the lower cultivation frame 10 can be used as the lower frame 10b of the upper cultivation frame 10.

Fig. 3A is a view of the cultivation shed 100 as viewed from the short side of the upper frame 10a and the lower frame 10B of the cultivation frame 10 in the longitudinal direction, and fig. 3B is a view of the cultivation shed 100 as viewed from the long side of the upper frame 10a and the lower frame 10B of the cultivation frame 10 in the short side direction.

As shown in fig. 3A and 3B, the cultivation bed 20 is placed on the lower frame 10B of the cultivation frame 10. As shown in fig. 3A and 3B, the attachment fittings 40 of the LED lighting device 30 are attached to the upper frame 10a of the cultivation shelf frame 10. As shown in fig. 3A, the attachment fittings 40 are attached to, for example, 4 locations in the short side direction of the upper frame 10a of the cultivation frame 10, and as shown in fig. 3B, the attachment fittings 40 are attached to, for example, two locations in the long side direction of the upper frame 10a of the cultivation frame 10.

As shown in fig. 3A, for example, a cultivation effective dimension L defined by a distance from the mounting metal fitting 40 to which the LED lighting device 30 is mounted to the cultivation bed 20 is set to 295 mm.

In addition, an adjusting mechanism 50 capable of adjusting the height of the cultivation booth 100 is provided at the support column 10c of the lowermost cultivation frame 10. In the example shown in fig. 3A and 3B, the upper frame 10a and the lower frame 10B of the lowermost cultivation shelf frame 10 are omitted.

As shown in fig. 1, the LED lighting devices 30 are mounted at a plurality of positions between the long sides of the upper frame 10a of the cultivation shelf frame 10 so as to be substantially perpendicular to the long sides (i.e., so that an angle formed between the long sides is about 85 degrees to 95 degrees). The LED illumination devices 30 are arranged substantially parallel to each other (including the case where the LED illumination devices 30 are offset from parallel to each other in a range of about-15 degrees to 15 degrees, preferably in a range of about-10 degrees to 10 degrees, and more preferably in a range of about-5 degrees to 5 degrees).

Fig. 4A is a view of the LED array 30a of the LED lighting device 30 of the present embodiment viewed from the short side of the upper frame 10a of the cultivation shelf frame 10 in the longitudinal direction. Fig. 4B is a view of the LED array 30a as viewed from the side of the cultivation bed 20. Fig. 4C is a view of the LED array 30a of the LED lighting device 30 and the reflector unit 60 as the light irradiation direction changing member viewed from the short side of the upper frame 10a of the cultivation shelf frame 10 in the longitudinal direction. Fig. 4D is a view of the LED lighting device 30 in which the LED array 30a and the reflector unit 60 are combined, as viewed from the short side of the upper frame 10a of the cultivation shelf frame 10 in the longitudinal direction. Fig. 4E is a view of the LED lighting device 30 in which the LED array 30a and the reflector unit 60 are combined, as viewed from the side of the cultivation bed 20.

As shown in fig. 4A, in the LED array 30a, a plurality of LED packages 30c are arranged on a base material 30b extending in the longitudinal direction with a space in the longitudinal direction of the base material 30 b. That is, in the arrangement region of a predetermined width extending in the longitudinal direction, the plurality of LED packages 30c are arranged with an interval in the longitudinal direction of the arrangement region. The interval is set to, for example, 22 mm. The maximum value of the interval at which the LED packages 30c are arranged is 100mm or less, preferably 50mm or less, and particularly preferably 20mm or less. The LED packages 30c are arranged in 128 pieces, for example. However, the number of LED packages 30c in the LED array 30a can be changed as appropriate.

The LED packages 30c are classified into, for example, a red-blue type, a white type, and the like according to the emission color of the LED. The width of one LED package 30c in the short side direction of the upper frame 10a of the cultivation frame 10 (the longitudinal direction of the base 30 b) is, for example, about 2 to 3 mm. However, the width of the LED package 30c can be changed as appropriate.

In the present embodiment, as shown in fig. 4A, a predetermined range from one end 30d thereof and a predetermined range from the other end 30d thereof of the LED array 30a are referred to as end side regions. The region other than the end region of the LED array 30a is referred to as a center region.

In the present embodiment, the reflecting plate unit 60 is disposed in the end portion side region of the LED array 30a, and the reflecting plate unit 60 is disposed corresponding to each of the LED packages 30c disposed in the end portion side region, and serves as a light irradiation direction changing member for changing the irradiation direction of light from the LED packages 30c from the end portion 30d side of the LED array 30a to the center portion side of the LED array 30 a.

As shown in fig. 4C, the base 60a and the reflection plate 60b of the reflection plate unit 60 are formed integrally. As shown in fig. 4D, such a reflection plate unit 60 is attached to the LED array 30 a. As a result, as shown in fig. 4E, the reflecting plate 60b is disposed in the space where the LED package 30c is disposed. The reflection plate 60b is not the LED package 30c, and does not correspond to a component of the LED package 30 c. Further, as in the present embodiment, the reflecting plate unit 60 is formed as a member separate from the LED array 30a and is attached to the LED array 30a after formation, thereby facilitating the manufacture of the LED lighting device 30.

The material of the reflection plate 60b may be any material as long as it has high reflectivity. The reflectance of the reflection plate 60b may be specular or total reflectance, and preferably, the amount of light absorption is small. In the present embodiment, the reflectance of the reflection plate 60b is 50% or more, for example.

Examples of the material of the reflection plate 60b include oxide, plastic, and metal. Specifically, the following materials may be used alone or in the form of a coating such as a powder. Examples of the material include magnesium carbonate, barium sulfate, alumina, titanium oxide, zinc oxide, lithopone, lead white, gold, silver, copper, platinum, aluminum, nickel, tin, tungsten, chromium, paper, pulp, cloth, white paint, glass, brick, and the like, and among them, titanium oxide, zinc oxide, barium sulfate, magnesium carbonate, aluminum, and the like are preferable.

The material of the reflecting plate 60b is preferably a titanium oxide-containing material, and when this material is used, reflectance is different depending on particle diameter and content, but reflectance of 70% or more can be achieved. In addition, even when a material such as silver, aluminum, or gold is used, a reflectance of 70% or more can be achieved.

In the predetermined number of the reflection plates 60b provided at the positions close to the end portions 30d of the LED array 30a, the angle formed by the arrangement surface of the reflection plate 60b and the reflection surface of the reflection plate 60b is smaller than the angle formed by the remaining reflection plates 60 b.

Fig. 5A is a perspective view of the reflector unit 60, and fig. 5B is a view of the reflector unit 60 viewed from the short side of the upper frame 10a of the cultivation shelf frame 10 in the longitudinal direction. As shown in fig. 5A, an opening 60c is provided in the base 60a of the reflector unit 60 at a position between the adjacent reflectors 60 b. As shown in fig. 4C, the LED package 30C of the LED array 30a is disposed in the opening 60C, and the LED array 30a and the reflector unit 60 are combined to form the LED lighting device 30.

Fig. 6A is a perspective view of another example of the reflector unit 60, and fig. 6B is a view of the reflector unit 60 as viewed from the short side of the upper frame 10a of the cultivation shelf frame 10 in the longitudinal direction. As shown in fig. 6A and 6B, the reflecting surface of the reflecting plate 60B of the reflecting plate unit 60 is not limited to a flat plate, and may be curved.

Fig. 7A is a diagram showing an example in which the reflection plate 60B is disposed in the vicinity of the LED package 30c and the size of the reflection plate 60B is small, and fig. 7B is a diagram showing an example in which the reflection plate 60B is disposed away from the LED package 30c and the size of the reflection plate 60B is large.

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 3mm, and light from the light emitting surface is irradiated in a wide irradiation range. Therefore, when the light distribution is controlled, as shown in fig. 7B, when the reflection plate 60B' is disposed at a position distant from the LED package 30c, it affects not only the light from the single LED package 30c but also the light from the other LED packages 30 c. Therefore, as shown in fig. 7B, in this case, if the large reflection plate 60B' is not provided, the reflection control cannot be performed efficiently.

However, as shown in fig. 7A, the reflection plate 60b is disposed so that the distance between the reflection plate 60b and the LED package 30c is 1 to 2 times the width of the LED package 30c, and thus light from the other LED packages 30c is not affected. Therefore, when the reflection plate 60b is disposed at the above-described disposition position, reflection control can be effectively performed by setting the height of the reflection plate 60b (the distance from the surface of the base material 60a to the upper end of the reflection plate 60b) to 2 to 3 times the width of the LED package 30 c.

In the present embodiment, as an example, the LED package 30c having a width of about 2mm in the short side direction of the upper frame 10a of the cultivation shelf frame 10 is used, and the position of the reflection plate 60b is set to a position about 2mm from the center of the adjacent LED package 30 c. The height of the reflector 60b from the disposition surface is set to about 5 mm.

Next, the effect of the reflection plate 60b will be described. Fig. 8A is a diagram showing a result of simulating a light distribution of the LED package 30c in a state where the reflection plate 60b is not provided. Fig. 8B is a view illustrating an angle formed between the reflection plate 60B and the base 60a as the disposition surface.

Fig. 8A shows an example of a result of simulating the diffusion of LED light using the LED packages 30c arranged at the 0mm position when the reference position is set to the 0mm position and the LED packages 30c are arranged from the 0mm position to the 1200mm position. As shown in fig. 8A, in a state where the reflection plate 60b is not disposed, the light emitted from the LED package 30c disposed at the position of 0mm is diffused to the position of 1200 mm. As shown in fig. 8A, it is understood that light is diffused in a direction of the negative side where the LED packages 30c are not arranged.

If the LED packages 30c arranged at the position of 0mm are the LED packages 30c arranged near the end of the LED array 30a, light diffused in the negative direction leaks from the outside of the cultivation booth 100, and the LED light cannot be effectively used.

Here, as shown in fig. 8B, a case where a reflecting plate 60B having a height of 5mm and an angle θ of 90 degrees is provided at a position 2mm from the light emitting point of the LED package 30c is considered. Fig. 9A is a diagram showing a simulation result in a case where the angle θ of the reflection plate 60B is 90 degrees, and fig. 9B is a diagram showing a simulation result in a case where the angle θ is 110 degrees.

In fig. 9A and 9B, the reflected light from the reflector 60B is depicted in a ring shape. As shown in fig. 9A, when the angle θ of the reflector 60b is 90 degrees, although light is not emitted in the negative direction, the light distribution of the illumination region directly below the LED package 30c decreases.

On the other hand, as shown in fig. 9B, in the case where the angle θ of the reflection plate 60B is 110 degrees, the light is diffused only to the irradiation surface at 300mm therefrom and is not irradiated outside at about 100mm from the light emitting point. That is, by setting the angle θ of the reflector 60b to 110 degrees, it is possible to prevent light from being emitted in the negative direction and to ensure the light distribution of the illumination region directly below the LED package 30 c.

In the present embodiment, according to the result of the above simulation, by providing the reflector unit 60 in the end region of the LED array 30a, the uniformity of the light distribution and the light distribution efficiency (the ratio of the amount of light emitted to the effective region out of the total amount of light emitted from the LED illumination device 30) are improved while preventing light from leaking from the outside of the cultivation greenhouse 100.

Fig. 10A is a graph showing the relative intensity when the angle of change (the angle θ shown in fig. 8B) is 70 degrees, fig. 10B is a graph showing the relative intensity when the angle of change is 90 degrees, and fig. 10C is a graph showing the relative intensity when the angle of change is 90 degrees. The relative intensities shown in fig. 10A to 10C are calculated, and are light intensities when the reflectance of the reflection plate 60b is assumed to be 80% of the specular reflectance.

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

As shown in fig. 10B, when the angle of change is 90 degrees, the light distribution efficiency is improved from 80% to 91%. It is understood that the uniformity of the light distribution is improved although the light distribution efficiency is inferior to the case where the angle of change is 70 degrees.

In the present embodiment, the angle of the reflector 60b is adjusted one by one, thereby achieving both the maximum light amount and the uniform light distribution. As shown in fig. 10C, by adjusting the angles of the reflection plates 60b one by one, the light distribution efficiency can be made 96%, and the uniformity of the light distribution can be improved.

As described above, according to the present embodiment, the small reflection plates 60b are attached to the end side regions in the vicinity of the LED packages 30c so as to correspond to the LED packages 30 c. As a result, light leaking to the outside of the cultivation booth 100 can be returned to the cultivation booth 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 arrangement position of the LED package 30c, the irradiation distribution in the cultivation greenhouse 100 can be optimized.

In the cultivation booth 100 as described above, the LED lighting device 30 irradiates light to the plant or other plant to be cultivated planted on the cultivation bed 20, thereby efficiently cultivating the plant or other plant to be cultivated. The growth of plants is based on photosynthesis. By realizing more photosynthesis, the plant body becomes larger and productivity is improved. In artificial light plant cultivation, an increase in the amount of light is associated with an increase in photosynthesis, resulting in an increase in productivity. The present invention can be expected to improve productivity by irradiating light, which is not irradiated to a plant but thrown outside a greenhouse, to the plant. Examples of the cultivated material other than the plant include mushroom, fish, microorganism, and cell.

(modification example)

The above embodiments are illustrative, and various modifications can be made without departing from the scope of the present invention.

In the above-described embodiment, the description has been given of the case where the reflector unit 60 is used as an example of the light irradiation direction changing member, but the present invention is not limited to such a case. For example, as shown in fig. 11, a refractive lens 70 as a light irradiation direction changing member may be provided corresponding to the LED package 30c in the end region, and the irradiation light from the LED package 30c may be concentrated on the center portion side.

In the above-described embodiment, the description has been given of the mode in which the angles of the reflection plates 60b are adjusted one by one, but the present invention is not limited to such a mode. For example, the angles of the reflection plates 60b may be uniform between the reflection plates 60 b.

The range in which the reflective plate 60b and the like are arranged can be set arbitrarily, but it is preferable that the reflective plate be arranged so as to correspond to at least 6 or more LED packages 30c counted from the end 30d of the LED array 30 a. For example, in the case of the LED lighting device 30 in which the LED packages 30c are arranged at a pitch of 20mm and the LED array 30a has a length of 1000mm, the reflecting plate 60b and the like are arranged corresponding to at least 6 LED packages 30 c. In this case, the light distribution of the LED package 30c within a range of 100mm from the end 30d is controlled. As a result, the light having a value of 1 or more is adjusted for the distribution improvement, and a significant effect can be expected, with one end side being 10% and both end sides being 20%.

In the above-described embodiment, the LED packages 30c are arranged in a row at a constant interval, but the present invention is not limited to this embodiment. For example, as shown in fig. 12A, a plurality of LED packages 30c may be set as one group, the interval between the LED packages 30c may be set constant within the group, and the interval between the groups may be set to be larger than and constant as compared with the interval between the LED packages 30 c.

As shown in fig. 12B, the interval between the LED packages 30c may not be constant. As shown in fig. 12C, the LED package 30C may be located at a different position in the short side direction of the base 30 b.

As shown in fig. 12D, the LED packages 30c may be arranged in a plurality of rows on the base 30 b. As shown in fig. 12E, a combination of an arrangement in which the number of LED packages 30c in the short side direction of the base 30b is plural and an arrangement in which the number of LED packages 30c in the short side direction of the base 30b is 1 may be used.

In the above-described embodiment, the description has been given of the case where the reflective plate 60b is disposed so as to correspond to each LED package 30c, but the present invention is not limited to such a case. For example, as shown in fig. 13A and 13B, the plurality of reflection plates 60B may be omitted. As shown in fig. 13C, the reflection plate 60b may not be disposed at a position corresponding to a predetermined number of LED packages 30C from the end portion 30 d. As shown in fig. 13D, the reflecting plates 60b may be disposed only on one end side of the LED array 30a, instead of the reflecting plates 60b disposed on both end sides of the LED array 30 a.

In the above-described embodiment, the case where one reflection plate 60b functions on one LED package 30c has been described, but as shown in fig. 14, the reflection plate 60b can function on the LED packages 30c on both sides of the portion where it is provided. In this case, it is preferable to have a reflector shape that changes the light direction with respect to the light on both sides of the reflector 60 b.

In the present description, the LED lighting device according to one embodiment of the present invention is described, but the present invention is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

Description of the reference numerals

10. A cultivation frame; 10a, an upper frame; 10b, a lower frame; 10c, a support post; 20. a cultivation bed; 30. an LED lighting device; 30a, LED columns; 30b, a substrate; 30c, an LED package; 30d, end portion; 40. mounting accessories; 50. an adjustment mechanism; 60. a reflection plate unit; 60a, a substrate; 60b, a reflector plate; 70. a refractive lens; 100. a cultivation shed.