TW201507603A - Plant cultivation device and illustration device - Google Patents

Abstract

A plant cultivation device, capable of possessing ornamental value of the interior of a house and the inside of a building and promoting the growth of a plant, is provided. The plant cultivation device 1 comprises a cultivation tray 3 and an illumination device 7. The cultivation tray 3 collectively comprises a culture medium receiving portion 26 that is capable of receiving a plant-growing culture medium tank 9. The illumination device 7 comprises a plurality of light sources 50 utilized for irradiating light rays toward the cultivation tray 3 through a cultivation space S that is formed with at least one opened part. The light sources 50 are configured on a position where the light intensity value or light quantity value radiated on a first zone A1 of the cultivation tray 3 including the culture medium receiving portion 26 and the periphery of the culture medium receiving portion 26 is greater than that radiated on a second zone A2 outside of the first zone A1 of the cultivation tray 3.

Description

Plant cultivation device and lighting device

The present invention relates to a plant cultivation apparatus and a lighting apparatus.

Since the past, plant cultivation apparatuses for indoor cultivation of plants have been known. In such a plant cultivation apparatus, an illumination device that irradiates light to a flower pot or a cultivation tray is provided, and the plant is cultivated by artificial light. In the case of using artificial light, the growth of the plant usually requires, for example, a light amount of 15 to 200 μmol/m ² /s (photosynthetically effective light quantum beam density) (for example, refer to Patent Document 1). The photosynthetically effective optical quantum beam density refers to the number of photons per unit time and unit area included in the wavelength of 400 to 700 nm necessary for photo synthesis.

In the plant cultivation apparatus, a cultivating unit in which a cultivating plant is placed in a container is known, and an illuminating device that illuminates the cultivating part (plant) is disposed in the container (see, for example, Patent Document 2). In the plant cultivation apparatus, the light emitted from the light source of the illumination device has direct light that reaches the cultivation unit directly, and the diffused light emitted from the light source is reflected on the inner side surface of the container to reach the reflected light of the cultivation unit, so that it is easy to ensure The above amount of light.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2005-192517

[Patent Document 2] Japanese Patent Laid-Open Publication No. SHO 63-251021

However, if it is cultivated in an occluded container like the above-mentioned plant cultivation apparatus In the case of the plant, there is a case where the heat of the illuminating device is easily accumulated in the container to cause dew condensation, and the ornamental (interior) in the house or the interior is damaged. Further, if the ventilation is insufficient, the carbon dioxide is consumed by the light synthesis of the plant to increase the oxygen concentration in the container. Therefore, in the case of a plant cultivation apparatus in which the cultivation space is closed, there is a plant wilting. On the other hand, in the case where the cultivation unit is provided in the open space, there is a case where the light is easily scattered and the plant cannot be efficiently irradiated with light. In order to grow the plant, it is necessary to ensure the above-mentioned amount of light, but if the amount of light is increased, it becomes too bright for the human eye, and the decorativeness of the plant cultivation device is impaired.

An object of the present invention is to provide a plant cultivation apparatus and a lighting apparatus which can ensure the ornamental property in a house, a room, etc., and can promote the growth of a plant.

A plant cultivation apparatus according to an aspect of the present invention includes: a cultivating portion including a accommodating portion for containing a culture medium capable of planting the plant; and an illuminating device including a plurality of light sources that emit light toward the cultivating portion via at least a part of the open cultivation space And a plurality of light sources are disposed so that the intensity of the light or the amount of light of the first region including the accommodating portion and the periphery of the accommodating portion that is irradiated onto the cultivating portion is larger than the outer side of the first region that is irradiated onto the cultivating portion 2 The position of the intensity of light or the value of the amount of light. Here, in order to promote light synthesis of the leaves of the plant, the value of the intensity or amount of light is preferably a measured value of the optically effective light quantum beam density. However, the present invention is not limited thereto, and may be, for example, a value obtained by measuring a photon of a wavelength effective for germination and formation of stems and leaves. The value of the intensity of light or the amount of light may be a value obtained by measuring the amount of light per unit time and the amount of light per unit area in the horizontal plane to which the light of the light source reaches. For example, to what extent is the value of light energy (W), luminous flux (lm), illuminance (lx), and photon (μmol) measured per unit time (s) or per unit area (m ² ) The value of the income.

In the plant cultivation apparatus, the plurality of light sources are disposed so that the intensity of the light or the amount of light of the first region including the accommodating portion and the accommodating portion on the cultivating portion is large. The position of the intensity of the light or the amount of light of the second region on the outer side of the first region on the cultivating portion is irradiated. Thereby, in the plant cultivation apparatus, light is efficiently irradiated to the culture medium of the plantable plant. Therefore, light is not used to be irradiated to a portion other than the region where the plant grows, so that the divergence of light can be suppressed, so that the amount of light emitted from the light source does not need to be excessively increased. As a result, it is possible to suppress the light emitted by the illumination device from being too bright (the eyes are glaring) in the plant cultivation device, and the decorativeness can be ensured. Further, in the plant cultivation apparatus, at least a part of the cultivation space is opened, so that heat can be suppressed from accumulating in the cultivation space, and ventilation can be sufficiently performed. Thereby, the occurrence of condensation or an increase in the oxygen concentration can be suppressed. Therefore, in the plant cultivation apparatus, the growth of the plant can be promoted.

In one embodiment, it is more preferable that the accommodating portion of the cultivating portion is disposed at a position where a region of light irradiated from one of the plurality of light sources overlaps with a region of light irradiated from the other light source. Thereby, in the plant cultivation apparatus, the light of a plurality of light sources is superposed on the accommodating part of the accommodating medium, and the light is surely irradiated. Further, the value of the intensity or amount of light in the accommodating portion of the medium can be made larger.

In one embodiment, it is more preferable that the optical axis of the light source is oriented toward the first region including the accommodating portion. Thereby, in the plant cultivation apparatus, the light of a plurality of light sources is concentrated in the accommodating part in which the medium is accommodated, and the light is reliably irradiated.

In one embodiment, it is more preferable that the optical axis direction of the light source is directed to the first region including the accommodating portion by setting the optical axis direction setting means in the direction of the optical axis of the light source. Thereby, regardless of the arrangement configuration of the light source, the optical axis of the light source is surely directed to the first region including the accommodating portion by the optical axis direction setting means. Therefore, in the plant cultivation apparatus, light is surely irradiated to the accommodating portion in which the medium is accommodated.

In one embodiment, it is more preferable that the intensity of the light or the amount of light that is irradiated to the first region including the accommodating portion is larger than the height at the height between the cultivating portion and the illuminating device. The value of the intensity or amount of light at the mid-level. Thereby, in the plant cultivation apparatus, in the cultivating part, the light is contained in the accommodating part of the medium for germination of the plant. The value of the intensity or the amount of light is large, so that the germination of the plant or the formation of the stems and leaves can be promoted, and the grown plant is closer to the level of the light source, and the intensity of the light or the amount of light is smaller than that of the first region, thereby suppressing Leaves of plants produce leaf burns. Therefore, the plants can be well cultivated in the plant cultivation apparatus.

In one embodiment, it is more preferable that the intensity of the light or the amount of light that is irradiated on the horizontal level at a height position between the cultivation unit and the illumination device above the second region is greater than the light that is irradiated to the second region. The value of the intensity or amount of light. Thereby, in the plant cultivation apparatus, when the plant grows in the middle layer and the leaves extend from the stem, the light is efficiently irradiated to the leaves. Therefore, in the plant cultivation apparatus, light synthesis can be promoted, and good cultivation of plants can be performed.

In one embodiment, it is preferable that each of the wavelengths of the light emitted by the plurality of light sources has a blue component or a red component, and the wavelength of the light irradiated to the first region includes a blue component more than a red component. Above the 2 area, the wavelength of light irradiated on the horizontal level at the height position between the cultivation part and the illumination device includes a red component more than a blue component. In the growth of plants, in order to promote germination, it is effective to illuminate the blue component light, and to promote the synthesis of leaf light, it is effective to illuminate the red component light. Further, in the case of formation of a stem, development of a leaf, or the like, it is preferred to have a component of both a blue component and a red component. Therefore, the blue component is included in the wavelength of the light irradiated to the first region, and the red component is included in the wavelength of the light irradiated to the upper portion of the second region. The growth of seeds from the germination of seeds to the formation and development of stems or leaves, and the synthesis of light by leaves.

In one embodiment, it is more preferable that an optical axis of the light source that emits light having a wavelength of a blue component faces the first region, and an optical axis of the light source that emits light having a wavelength of a red component faces the second region. The middle level. Thereby, the light of the blue component is irradiated to the first region, and the light of the red component is irradiated to the upper layer above the second region.

A plant cultivation apparatus according to an aspect of the present invention includes: a cultivation part, which comprises a housing a accommodating portion of the culture medium for planting; and an illuminating device that emits light toward the cultivating portion via at least a part of the open cultivation space; and the illuminating device includes: a plurality of light sources, which emit light, and a light distribution conversion device, which The light emitted by the light sources is concentrated in the cultivation section.

The plant cultivation apparatus includes a light distribution conversion device that concentrates light emitted from a plurality of light sources on a cultivation unit. Thereby, the light radiated from the light source is concentrated on the cultivating portion by the light distribution conversion device without being diverged (diffused). Therefore, in the plant cultivation apparatus, light is efficiently irradiated to the medium accommodated in the accommodating section. Therefore, the light is not inadvertently irradiated to a portion other than the region where the plant grows, so that it is not necessary to excessively increase the amount of light emitted from the light source. Thereby, it is possible to suppress the light emitted by the illumination device from becoming too bright (the eyes are glaring), and the decorativeness can be ensured. Further, in the plant cultivation apparatus, at least a part of the cultivation space is opened, so that heat can be suppressed from accumulating in the cultivation space, and ventilation can be sufficiently performed. Therefore, it is possible to promote the growth of plants.

A lighting device according to an aspect of the present invention is the plant growing device according to any of the above.

According to the present invention, it is possible to ensure ornamental (decorative) in the interior, indoors, and the like, and to promote the growth of plants.

1‧‧‧plant cultivation equipment

3‧‧‧Cultivating plate (cultivation department)

5‧‧‧ frame

5a, 5b‧‧‧ openings

7, 7A, 7B, 7C, 7D, 7E‧‧‧ lighting devices

9, 9A‧‧‧ medium tank

9a, 9Aa‧‧‧bump

9b, 9Ab‧‧‧Cage

10‧‧‧Storage Department

12, 12A‧‧ ‧ cover

14‧‧‧ bottom

16‧‧‧ side

16a‧‧‧ Opening

17‧‧‧temperature label

20, 88‧‧‧ Body Department

20a‧‧‧ positive

20b‧‧‧back

22a, 22b, 22c, 22d‧‧‧ feet

24a, 24b‧‧‧ highlights

26‧‧‧Media Containment Department

30‧‧‧Cylinder

40‧‧‧Loading Department

40a‧‧‧Loading surface

40b‧‧‧ lower surface

41‧‧‧ Disk fixing department

42, 44‧‧‧ side

42a, 44a, 46a‧‧‧ inner surface

43‧‧‧ bottom

45‧‧‧Slip-proof components

46‧‧‧ top board

46b‧‧‧ upper surface

47, 66, 70, 84‧‧ ‧ recess

48‧‧‧heating slit

50, 50a, 50b, 72‧‧‧ light source

52, 62, 74‧‧‧ substrates

52a, 56s, 57a‧‧‧ side

52b‧‧‧The other side

54, 54A, 76, 86‧‧‧Light distribution conversion unit (light distribution conversion device)

55‧‧‧Dissipation plate

56‧‧‧Lighting body

56a, 56c‧‧‧ open end

56b‧‧‧Receiving Department

56f‧‧‧ inside

57‧‧‧Flange

58‧‧‧through board

58a‧‧‧ exit end face

60, 60A, 60B, 60C‧‧‧ Lighting Department

64‧‧‧Fixed part (optical axis direction setting device)

68, 82‧‧‧ protrusions

76f‧‧‧reflecting surface

90‧‧‧Support Department

A, B, C‧‧‧ water level

A1‧‧‧1st area

A2‧‧‧2nd area

AX1, AX2‧‧‧ shaft components

C1, C2, C3, C4‧‧‧ curved surface

FA1, FA2, FB1, FB2, FC1, FC2‧‧‧ illuminated area

H‧‧‧through hole

K‧‧‧ accommodating space

MS1, MS2‧‧‧ medium level

N‧‧‧ screws

O‧‧‧ openings

S‧‧‧ cultivation space

Fig. 1 is a top perspective view showing the plant cultivation apparatus in the first embodiment.

Figure 2 is a front elevational view of the plant cultivation apparatus shown in Figure 1.

Figure 3 is a rear view of the plant cultivation apparatus shown in Figure 1.

Figure 4 is a left side view of the plant cultivation apparatus shown in Figure 1.

Figure 5 is a right side view of the plant cultivation apparatus shown in Figure 1.

Figure 6 is a plan view of the plant cultivation apparatus shown in Figure 1.

Figure 7 is a bottom plan view of the plant cultivation apparatus shown in Figure 1.

Figure 8(a) is a view showing a cross-sectional view taken along line aa of Figure 2, Figure 8(b) is a view showing a cross-sectional view taken along line bb of Figure 2, and Figure 8(c) is a view of Figure 8(a). ) A diagram of the state in which the culture tray is removed.

Fig. 9 is a view showing a configuration of a cross section taken along the line IX-IX in Fig. 6.

Fig. 10 is an exploded perspective view showing the cultivation tray.

Fig. 11 is a perspective view showing a lid portion and a medium.

Fig. 12 (a) is a view showing the cultivation disk from above, and Fig. 12 (b) is a view showing a cross-sectional view taken along line b-b in Fig. 12 (a).

13(a) and 13(b) are perspective views showing the storage portion, and Figs. 13(c) and 13(d) are perspective views showing the cover portion in the modified example.

14(a) to 14(d) are perspective views showing the frame of the exploded body, and Figs. 14(e) and 14(f) are perspective views showing the bottom of the frame.

Fig. 15 (a) is a plan view showing the illuminating device, and Fig. 15 (b) is a view showing a cross-sectional view taken along line b-b in Fig. 15 (a).

16(a) and 16(b) are perspective views showing a main portion of the light distribution conversion portion, and Figs. 16(c) and 16(d) are perspective views showing a transmission plate of the light distribution conversion portion.

Fig. 17 is a view showing a cross-sectional configuration in a state in which a lighting device is mounted on a casing.

Fig. 18 is a view schematically showing a direction in which light is diffused by a light distribution conversion unit.

19(a) and 19(b) are diagrams schematically showing light emitted by the illumination device.

20(A) to (C) are diagrams schematically showing an irradiation area of each horizontal plane in the cultivation space by the light irradiated by the illumination device.

Fig. 21 is a view schematically showing light emitted by an illumination device of a plant cultivation device according to another embodiment.

22(A) and 22(B) are diagrams schematically showing an irradiation area of each horizontal plane in the cultivation space by the light irradiated by the illumination device.

Fig. 23 (a) is a plan view showing a lighting device of the plant cultivation device of the second embodiment Fig. 23(b) is a view of the cultivation tray viewed from above.

Fig. 24 is a graph showing the relationship between the wavelength of light and the relative luminous intensity.

Fig. 25(a) is a view schematically showing light emitted by the illumination device, and Fig. 25(b) is a view schematically showing an irradiation area of each horizontal plane in the cultivation space by the light irradiated by the illumination device.

Fig. 26 is a view schematically showing the values of the intensity or amount of light of the light irradiated by the illumination device at each horizontal plane in the cultivation space.

27(a) and 27(b) are views showing a modification of the illumination device of the plant cultivation device of the second embodiment.

Fig. 28 (a) is a plan view showing an illumination device of the plant cultivation device according to the third embodiment, and Fig. 28 (b) is a view of the cultivation disk viewed from above.

Fig. 29 (a) is a plan view showing an illuminating unit, and Fig. 29 (b) is a view showing a cross-sectional view taken along line b-b in Fig. 29 (a).

Fig. 30(a) is a view schematically showing light emitted by the illumination device, and Fig. 30(b) is a view schematically showing an irradiation area of each horizontal plane in the cultivation region by the light irradiated by the illumination device.

Fig. 31 is a view schematically showing the values of the intensity or amount of light of the light irradiated by the illumination device at each horizontal plane in the cultivation space.

32(a) and 32(b) are views showing a modification of the illumination device of the plant cultivation device according to the third embodiment.

Fig. 33 is a view showing a modification of the illumination device of the plant cultivation device according to the first embodiment.

Fig. 34 is a view showing a modification of the illumination device of the plant cultivation device according to the second embodiment.

Fig. 35 is a view showing a modification of the illumination device of the plant cultivation device according to the second embodiment.

Fig. 36 is a view showing a modification of the illumination device of the plant cultivation device according to another embodiment.

Fig. 37 is a view showing a modification of the illumination device of the plant cultivation device according to another embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and the repeated description is omitted.

[First Embodiment]

Fig. 1 is a top perspective view showing the plant cultivation apparatus of the first embodiment. Figure 2 is a front elevational view of the plant cultivation apparatus shown in Figure 1. Figure 3 is a front elevational view of the plant cultivation apparatus of Figure 1. Figure 4 is a left side view of the plant cultivation apparatus shown in Figure 1. Figure 5 is a right side view of the plant cultivation apparatus shown in Figure 1. Figure 6 is a plan view of the plant cultivation apparatus shown in Figure 1. Figure 7 is a bottom plan view of the plant cultivation apparatus shown in Figure 1. 8(a) is a view showing a cross-sectional view taken along line aa of FIG. 2, FIG. 8(b) is a view showing a cross-sectional view taken along line bb of FIG. 2, and FIG. 8(c) is a view showing FIG. A) The state diagram of the culture tray is removed. Fig. 9 is a view showing a configuration of a cross section taken along the line IX-IX in Fig. 6. In the following description, the plant cultivation apparatus 1 shown in FIGS. 3 and 4 is referred to as "upper", "lower", "left", and "right".

The plant cultivation apparatus 1 shown in each figure is a device for placing a type of indoor hydroponic cultivation plant on a floor or a table. The plant cultivation apparatus 1 has a function for cultivating plants, and has a function as an ornament of the room. Examples of the plant cultivated by the plant cultivation apparatus 1 include herbaceous plants (basil, parsley, etc.) as an example.

As shown in the respective figures, the plant cultivation apparatus 1 includes a cultivation tray (cultivation unit) 3, a housing 5, and a lighting device 7.

First, the cultivation tray 3 will be described. Fig. 10 is an exploded perspective view showing the cultivation tray. Fig. 11 is a perspective view showing a lid portion and a medium. Fig. 12 (a) is a view showing the cultivation disk from above, and Fig. 12 (b) is a view showing a cross-sectional view taken along line b-b in Fig. 12 (a). 13(a) and 13(b) are perspective views showing the storage portion, and Figs. 13(c) and 13(d) are perspective views showing the cover portion of the modification.

The cultivation tray 3 houses a culture tank 9 for implanting seeds of plants or roots of germinated plants, thereby cultivating plants. The cultivation tray 3 includes a storage portion 10 and a lid portion 12.

The reservoir 10 stores a liquid (in the present embodiment, a culture solution). The reservoir 10 is formed of a material that is shielded from light (no light is transmitted). In the present embodiment, the storage unit 10 is set to white. The reservoir 10 includes a bottom portion 14 and a side portion 16 extending upward from an edge portion of the bottom portion 14. The storage portion 10 is open at the upper end side, and the opening portion 16a is formed by the side portion 16. As shown in FIGS. 2 and 3, the side portion 16 has a substantially trapezoidal shape and is widened toward the upper side. The shape of the reservoir 10 is not particularly limited. As shown in FIG. 10, a temperature label 17 for displaying the water temperature may be provided in the storage unit 10.

As shown in FIGS. 10, 11, and 12, the lid portion 12 covers the opening portion 16a of the reservoir portion 10, and is detachably provided to the reservoir portion 10. The cover portion 12 includes a body portion 20, leg portions 22a, 22b, 22c, 22d, and protrusion portions 24a, 24b.

The body portion 20 covers the opening portion 16a of the reservoir portion 10. The main body portion 20 has a shape corresponding to the opening portion 16a of the reservoir portion 10. The body portion 20 is formed of a material that is shielded from light. The lid portion 12 is a color other than black, that is, a color other than black, and is white in the present embodiment. The front surface 20a of the main body portion 20 (the cover portion 12) is a flat surface and is a reflection surface that can reflect light. The reflectance of the light of the front surface 20a is, for example, 50 to 100%.

A medium accommodating portion 26 is provided in the main body portion 20. The medium accommodating portion 26 is a portion to which the culture medium tank 9 is inserted and attached, and has a substantially circular shape when viewed in a direction orthogonal to the surface of the main body portion 20. The medium accommodating portion 26 is provided in a plurality of zigzag portions in the main body portion 20 (three in the present embodiment). The number and arrangement of the medium accommodating portions 26 provided in the main body portion 20 are not particularly limited.

The tubular portion 30 is provided in the body portion 20. The tubular portion 30 surrounds the medium containing portion 26 and protrudes from the back surface 20b of the body portion 20. The length of the tubular portion 30 is appropriately set depending on the design. Similarly to the main body portion 20, the tubular portion 30 is formed of a material that is shielded from light. The tubular portion 30 may also be integrally formed with the body portion 20 in the same material.

The leg portions 22a to 22d are for supporting the main body portion 20 when the lid portion 12 is placed on a table or the like. For example, in the cultivation of the plants for the hydroponic cultivation, the convenience of the operation of removing the culture liquid when the lid portion 12 is temporarily detached from the storage portion 10 and performing work is promoted. The leg portions 22a-22d extend from the back surface 20b of the body portion 20. The leg portions 22a to 22d are provided in plural at the both end sides of the longitudinal direction of the main body portion 20 (two in the present embodiment). The length of the leg portions 22a to 22d is set to be the length stored in the storage portion 10 in a state where the lid portion 12 is attached to the reservoir portion 10, and is longer than the lower end of the culture medium tank 9 when the culture medium tank 9 is attached to the lid portion 12. unit.

The protruding portions 24a and 24b are disposed in a pair at a position opposite to each other in the longitudinal direction of the main body portion 20. The protruding portions 24a and 24b are provided to protrude obliquely upward from the body portion 20. The protruding portions 24a, 24b are portions that are grasped by fingers when the cover portion 12 is attached or detached.

The culture tank 9 is a member that houses a culture medium (not shown) in which seeds or roots of plants are implanted. The medium is constituted, for example, by filling a urethane resin, a fiber, or the like in place of the soil and bundling. The medium tank 9 is inserted into the medium accommodating portion 26 of the lid portion 12, and is held by the medium accommodating portion 26.

When the medium tank 9 is inserted into the medium containing portion 26 provided in the lid portion 12 of the cultivation tray 3, the mortar-like convex edge 9a having a neck portion larger than the diameter of the medium containing portion 26 is caught without falling to The medium accommodating portion 26 is disposed on the lower side. The upper side of the lid portion 12 is in a state where the flange 9a can be observed. The flange 9a is formed of a material that is shielded from light. The convex edge 9a is set as a reflecting surface that can reflect light. The reflectance of the light of the reflecting surface is, for example, 50 to 100%. The flange 9a is a color other than 0, that is, a color other than black, and is white in the present embodiment. Further, a cage portion 9b is formed in the lower portion of the flange 9a in order to accommodate the medium. The cage portion 9b has a conical trapezoidal shape and has openings on the side surface and the bottom surface. By this, the plant The root can be extended downward and laterally.

As shown in Fig. 13 (c) and Fig. 13 (b), the lid portion 12A and the culture medium tank 9A may be integrated. The medium tank 9A is arranged in a plurality of zigzag shapes in the main body portion 20 (three in the present embodiment). In the lid portion 12A, the medium tank 9A constitutes a medium containing portion. Similarly to the culture tank 9, the culture tank 9A includes a flange 9Aa and a cage portion 9Ab. The cage 9Ab is a frame for supporting the door shape of the medium. The cage portion 9Ab is formed below the flange 9Aa.

Next, the casing 5 will be described. 14(a) to 14(d) are perspective views showing the frame after the disassembly, and Figs. 14(e) and 14(f) are perspective views showing the bottom of the frame. As shown in FIGS. 1 to 9 and 14 , the housing 5 includes a mounting portion 40 , a pair of side portions 42 and 44 , and a top plate portion 46 . The mounting portion 40, the pair of side portions 42, 44, and the top plate portion 46 are colors other than black, that is, black, and are white in the present embodiment. The width of the mounting portion 40, the pair of side portions 42, 44, and the top plate portion 46 (the dimensions in the upper and lower directions in FIGS. 6 and 7) are substantially equal, and as shown in FIG. 8, the width of the cultivation tray 3 is set to be equal to or greater than the width of the cultivation tray 3. . In the present embodiment, the width of the placing portion 40, the pair of side portions 42, 44, and the top plate portion 46 is substantially equal to the width of the cultivation tray 3.

The frame 5 which is a frame-like body is formed in a ring shape having an upper side, a left side and a lower side when viewed from the front or the back (see FIGS. 2 and 3, etc.) when placed on a table or the like. The frame 5 is provided with a mounting portion 40 on the lower side, a pair of side portions 42 and 44 on the left and right sides, and a top plate portion 46 on the upper side, and integrally molded from a material such as plastic resin. The main body of the casing 5 has a ring-shaped hollow structure (see FIGS. 9 and 14 and the like). The outer shape and the inner shape have a substantially rectangular shape when viewed from the front side and the back side, and have a specific apparent width (thickness) and a specific depth width in the depth direction from the front surface toward the back surface.

Moreover, the frame 5 can be regarded as one cube, the upper surface is a top plate portion, the lower surface is a mounting portion, and the left side surface and the right side surface correspond to a pair of side portions. The front surface and the back surface do not have a surface material, and have an opening 5a and an opening 5b. Further, the casing 5 is placed on the lower surface of the placing portion 40 to enclose the cultivation tray 3, and the cultivation tray 3 is surrounded by the annular frame 5 and housed inside the casing 5. Inside the casing 5, a cultivation space S in which cultivated plants are formed is divided.

The cultivation tray 3 is placed on the placing unit 40. The placing unit 40 is a member that forms an annular hollow structure (see FIGS. 9 and 14 and the like) at the lower portion of the casing 5. The placing unit 40 includes a disk fixing portion 41 as shown in FIG. 8( c ). The disk fixing portion 41 is configured to embed the bottom portion 14 of the cultivation tray 3 in the mounting portion 40 in order to fix the cultivation tray 3 to the frame 5 (that is, to define a fixed position of the cultivation tray 3 in the housing 5 as a portion). In some cases, the cultivation tray 3 is disposed such that the longitudinal direction of the cultivation tray 3 and the longitudinal direction of the mounting portion 40 (the horizontal direction in FIGS. 3 and 4) are in the same direction. In the present embodiment, the disk fixing portion 41 has a shape in which an annular projection continuously protrudes in a ring shape upward from the mounting surface 40a of the mounting portion 40 in conformity with the contour shape of the bottom portion 14 of the cultivation tray 3. However, the disk fixing portion 41 is not limited thereto, and may be, for example, a configuration in which the protrusions are provided at the important portions; and the mounting surface 40a of the placing portion 40 is formed to conform to the contour shape of the bottom portion 14 of the cultivation tray 3. In the recessed portion, the bottom portion 14 of the cultivation tray 3 is fitted into the concave portion to be fitted to the mounting portion 40.

When the cultivation tray 3 is inserted into the disk fixing portion 41 (annular projection), the bottom edge of the bottom portion 14 is inserted and fitted into the annular projection. The bottom portion 14 of the storage portion 10 of the cultivation tray 3 is disposed in the disk fixing portion 41. Thereby, the cultivation tray 3 is positioned in the mounting portion 40, and movement in the horizontal direction or the like is restricted, so that it is less likely to deviate from the casing 5. The anti-slip member 45 is provided on the lower surface 40b of the placing portion 40 (the surface facing the surface on which the plant growing device 1 is placed). One (half) of the anti-slip member 45 is disposed at the bottom portion 43 of the frame 5. The bottom portion 43 is fitted into the recess 47 provided at the lower portion of the frame 5.

The pair of side portions 42 and 44 extend upward from both ends of the mounting portion 40 and are disposed to face each other. The side portions 42 and 44 have a curved shape and are members of an annular hollow structure (see FIGS. 9 and 14 and the like) constituting the left and right side portions of the frame body 5. The pair of side portions 42 and 44 are disposed on the side portions 42 and 44 of the cultivation tray 3 when the cultivation tray 3 is placed on the placing portion 40. The inner side surfaces of the side portions 42, 44 (the inner surfaces 42a, 44a of the side portions 42, 44) are set as reflecting surfaces that can reflect light. The reflectance of the inner surfaces 42a, 44a is, for example, 50 to 100%. The connecting portions of the side portions 42, 44 and the mounting portion 40, the inner surfaces 42a, 44a of the side portions 42, 44 and the mounting portion 40 The mounting surface 40a is smoothly continuous by the curved surfaces C1 and C2 having a specific curvature.

The top plate portion 46 is a member that connects the upper end portions of the pair of side portions 42 and 44 and is provided in the horizontal direction to form an annular hollow structure (see FIGS. 9 and 14 and the like) above the frame body 5. As shown in FIGS. 7 and 9, the illuminating device 7 is built in the top plate portion 46. That is, the illuminating device 7 is buried and held in the annular hollow structure. The top plate portion 46 is disposed at a position facing the placing portion 40, that is, at a position facing the cultivation tray 3 (the lid portion 12) placed on the placing portion 40. That is, the illumination device 7 irradiates light from above the cultivation tray 3. The top plate portion 46 is disposed at a height position of, for example, about 200 mm from the lid portion 12 of the cultivation tray 3, but the distance from the lid portion 12 of the cultivation tray 3 is appropriately set to ensure the photon of the artificial light source for the plant. The concentration (the magnitude of the intensity of light or the amount of light) may be sufficient.

The inner surface (inner surface 46a) of the top plate portion 46 is set as a reflecting surface that can reflect light. The reflectance of the inner surface 46a is, for example, 50 to 100%. At the connecting portion between the top plate portion 46 and the side portions 42, 44, the inner surface 46a of the top plate portion 46 and the inner surfaces 42a, 44a of the side portions 42, 44 are smoothly continuous by the curved faces C3, C4 having a specific curvature.

On the outer surface (upper surface 46b) of the top plate portion 46, a plurality of heat dissipation slits 48 are provided. The heat sink slit 48 is a portion that radiates heat generated from the illumination device 7. The heat dissipation slits 48 are disposed at a predetermined interval from the upper surface 46b of the top plate portion 46.

Next, the lighting device 7 will be described in detail. Fig. 15 (a) is a plan view of the illuminating device viewed from the inside, and Fig. 15 (b) is a view showing a cross-sectional view taken along line b-b in Fig. 15 (a). 16(a) and 16(b) are perspective views showing a main portion of the light distribution conversion portion, and Figs. 16(c) and 16(d) are perspective views showing a transmission plate of the light distribution conversion portion. Fig. 17 is a view showing a cross-sectional configuration in a state in which a lighting device is mounted on a casing. Fig. 18 is a view schematically showing a direction in which light is diffused by a light distribution conversion unit.

The illuminating device 7 emits light toward the cultivation tray 3. The illuminating device 7 includes a control device (not shown) and is connected to a power source, and the control device controls the turning on and off (lighting and extinguishing) of the switch. The lighting time of the lighting device 7 is taken into account in the sunshine of each season in the external environment. Set between.

As shown in FIGS. 15 to 18, the illumination device 7 includes a light source 50, a substrate 52 on which the light source 50 is disposed, and a light distribution conversion unit (light distribution conversion device) 54 that converts the direction in which the light irradiated to the cultivation disk 3 is diffused. The light source 50 is, for example, an LED (Light Emitting Diode). In the present embodiment, the light source 50 is, for example, a white light emitting diode. The light source 50 is disposed, for example, on a plurality of surfaces 52a of the substrate 52 having a substantially rectangular plate shape. In the present embodiment, 54 light sources 50 are arranged on the substrate 52. Specifically, as shown in FIG. 15(a), the light source 50 is formed on one surface 52a of the substrate 52 at a predetermined interval in the left-right direction of the casing 5, and is formed in a row of 18, and the 18 light sources 50 are tied to each other. Three rows are arranged at a predetermined interval in the width direction of the casing 5. The number of the light sources 50 and the arrangement position may be appropriately set according to the design.

The other surface 52b of the substrate 52 facing the one surface 52a is abutted (surface-contacted) with the heat dissipation plate 55 as shown in FIG. The heat sink 55 is made of a material having a high thermal conductivity, such as aluminum. The heat of the light source 50 is transmitted to the heat dissipation plate 55 via the substrate 52. The heat dissipation plate 55 is, for example, a plate member having a substantially rectangular shape and has an outer size larger than that of the substrate 52. That is, the entire surface of the other surface 52b of the substrate 52 is in contact with the heat dissipation plate 55. Thereby, the heat of the substrate 52 is efficiently transferred to the heat dissipation plate 55. The heat sink 55 is disposed in the ceiling portion 46 in the housing space K provided below the heat dissipation slit 48. The heat of the heat dissipation plate 55 is released from the heat dissipation slit 48 to the outside of the frame 5.

The light distribution conversion unit 54 converts the direction of the light (diffused light) emitted from the light source 50, and condenses it on the cultivation tray 3 (medium). The light distribution conversion unit 54 includes a light distribution main body portion 56, a flange portion 57 that protrudes outward from the periphery of the light distribution main body portion 56, and a transmission plate 58. The light distribution main body portion 56 is a frame-shaped body and has an opening portion O. When the substrate 52 is mounted on the light distribution main body portion 56, the light source 50 is placed in the opening portion O to surround the light source 50. The light distribution main body portion 56 includes a housing portion 56b that is received in the substrate 52 and accommodated in the opening end portion 56a of the opening portion O. When the substrate 52 is housed in the accommodating portion 56b of the light distribution main portion 56, the other surface 52b of the substrate 52 and the one surface 56s of the light distribution main portion 56 are substantially flush with each other.

The inner side surface 56f of the partition portion O formed by the division of the light distribution main body portion 56 is set to reflect light. Reflective surface. As shown in Fig. 15 (b), the inner side surface 56f of the light distribution main body portion 56 expands in a wedge shape from the light source 50 side toward the opening end portion 56c. In the present embodiment, the distance (interval) between the illuminating device 7 of the top plate portion 46 and the lid portion 12 of the cultivation tray 3 is about 200 mm, and the front surface 20a of the main body portion 20 of the cultivation tray 3 has a length of about 225 mm and a width of about 150 mm. Since the interval between the medium accommodating portions 26 is about 85 mm, the inner side surface 56f forms an angle of, for example, about 80 with respect to one surface 56s of the light distribution main body portion 56. A transmission plate 58 including an emission end surface 58a is disposed at the opening end portion 56c of the light distribution main body portion 56. When the transmission plate 58 is a lens, the diffusion range (concentration) can be reduced by refracting the transmitted diffused light. Thereby, the irradiation area of the light can be limited to a specific range (concentration). Further, it is also possible to lithographically print a person such as a Fresnel lens. The transmission plate 58 is a translucent transparent member, and is formed into a plate shape by, for example, an acrylic resin. The distance between the light source 50 and the emission end surface 58a of the transmission plate 58 is set, for example, to about 15 mm. The interval between the light source 50 and the exit end surface 58a may be appropriately set depending on the design. Furthermore, the transmission plate 58 can enhance the appreciation of the person by cutting off (attenuating) the emission of light of a wavelength unnecessary from the growth of the plant in the light irradiated from the light source 50.

The flange portion 57 is located on the side of the opening end portion 56a of the light distribution main body portion 56, and a plurality of the light distribution main body portions 56 are extended outward (in the present embodiment, six). One surface 57a of the flange portion 57 and one surface 56s of the light distribution main portion 56 are substantially flush with each other. A through hole H through which the screw N that joins the heat dissipation plate 55 and the light distribution conversion portion 54 is inserted is provided in the flange portion 57. By bonding the light distribution conversion portion 54 to the heat dissipation plate 55, the substrate 52 on which the light source 50 is disposed, the light distribution conversion portion 54, and the heat dissipation plate 55 are integrally provided. The illuminating device 7 is attached to the casing 5 as an integrated component.

The light distribution conversion unit 54 corrects the light distribution characteristics of the light source 50, and reflects the light emitted from the light source 50 on the inner side surface 56f of the light distribution main unit 56, and concentrates the light diffused to the outside to concentrate the light distribution. It exits from the exit end face 58a of the transmissive plate 58 in a particular direction. Thereby, the light radiated from the illumination device 7 is irradiated to a specific region of the cultivation tray 3. At this time, a lens can be used for the transmission plate 58, and the light distribution can be concentrated. Thereby, self-lighting The light emitted by the radiation is concentratedly irradiated to a specific area of the cultivation tray 3. Specifically, as shown in FIG. 18, in the light distribution conversion unit 54, the diffused light among the plurality of light beams emitted from one light source is reflected by the reflecting plate once to convert the angle of the diffused light, and is set to 1 The angle of refraction of the secondary reflected diffused light through the lens causes the plurality of rays emitted by the light source to converge in a fixed direction. The area of the light that is irradiated to the cultivation tray 3 by the illumination device 7 will be described in detail below.

19(a) and 19(b) are diagrams schematically showing light emitted by the illumination device. Fig. 20 is a view schematically showing an irradiation area of light irradiated on each surface by an illumination device. In Fig. 20, (A) shows the irradiation area of light in the front surface 20a of the main body portion 20 (cover portion 12) of the cultivation tray 3 (the surface of the cultivation tray 3 along the line aa of Fig. 19(a)), (B) ) indicates the irradiation area of the light in the layer MS2 (the surface along the bb line of Fig. 19 (a)) in the cultivation space S, and (C) indicates the level MS1 in the cultivation space S (the line cc along the line of Fig. 19 (a) The area in which the light is illuminated. Further, in the cultivation space S, the level MS2 means the upper side (at least 20 mm or more) of the front portion 20a of the main body portion 20 (the lid portion 12) of the cultivation tray 3, and the permeation plate of the light distribution conversion portion 54 in the illumination device 7. A horizontal plane at a height position substantially between the exit end face 58a of 58 and the front face 20a of the body portion 20. The reason why the middle layer MS2 is set at least 20 mm or more above the front surface 20a is that it is the size of the growth stage of the plant sprouting, leaf stretching or elongation. The level MS1 of the cultivation space S is higher than the middle level MS2, and is closer to the horizontal plane at the height position of the exit end surface 58a than the middle level MS2.

As shown in FIG. 19 and FIG. 20, the light radiated from the light source 50 of the illumination device 7 gradually expands the irradiation area (irradiation field) as it goes toward the cultivation tray 3. As shown in Fig. 20(A), in the front surface 20a of the main body portion 20 of the lid portion 12 of the cultivation tray 3, there is a region where light is irradiated and a region where light is not irradiated. Specifically, the medium accommodation portion 26 is irradiated with light by aligning the three medium accommodation portions 26 of the medium containing medium tank 9 in the front surface 20a or the three medium storage portions 26 of the front surface 20a. The first region A1 is generated around the medium accommodating portion 26. Here, the first area A1 is irradiated with a plurality of light sources included in the self-illuminating device 7 50 The area where each of the irradiated areas of the emitted light is synthesized.

The second region A2 on the outer side of the first region A1 is hardly irradiated with light emitted from the light source 50 of the illumination device 7. That is, the light source 50 built in the illumination device 7 concentrates the direct light and the diffused light emitted from the light source 50 to the front surface 20a of the main body portion 20 by performing the optical axis alignment or the light distribution conversion of the diffused light. The range of the first region A1 around the medium accommodating portion 26 and the medium accommodating portion 26. The illuminating device 7 having the built-in light source 50 is attached to the casing 5 such that the intensity or amount of light that is incident on the cultivation tray 3 including the medium accommodating portion 26 and the first region A1 around the medium accommodating portion 26 is increased. The value is larger than the value of the intensity or amount of light of the second region A2 irradiated onto the outer side of the first region A1 on the cultivation tray 3. Thereby, the front surface 20a of the main body portion 20 of the lid portion 12 of the cultivation tray 3 includes the first region A1 around the medium containing portion 26 and the second region A2 on the outer side of the first region A1. The beam density [μmol/m ² /s] is higher.

From another point of view, the medium accommodating portion 26 of the culture tank 9 in the cultivation tray 3 is disposed in a region where the intensity of light or the amount of light is large. Thereby, the medium tank 9 (medium) accommodated in the medium accommodating portion 26 of the cultivation tray 3 is efficiently irradiated with light.

As described above, in the present embodiment, the front surface 20a of the main body portion 20 of the lid portion 12 of the cultivation tray 3 includes the first region A1 around the medium containing portion 26 and the second portion outside the first region A1. The photosynthetically effective optical quantum beam density [μmol/m ² /s] is higher in the region A2 than in the region A2. Thereby, in the plant cultivation apparatus 1, the medium tank 9 of the plantable plant is irradiated with light efficiently. Therefore, the second region A2 other than the first region A1 in which the plant grows is hardly irradiated with light, and light divergence can be suppressed, so that it is not necessary to excessively increase the amount of light emitted from the light source 50. As a result, in the plant cultivation apparatus 1, it is possible to suppress the light emitted from the illumination device 7 from becoming too bright, and it is possible to ensure the decorativeness. In addition, the region other than the first region A1 in which the plant grows (the second region A2 and the peripheral region on the outer side of the cultivation tray 3) is hardly irradiated with light, so that it is possible to suppress the useless light that does not contribute to the growth of the plant. Energy saving.

Further, in the plant cultivation apparatus 1, the cultivation space S is opened, so that heat polymerization can be suppressed It is accumulated in the cultivation space S. Thereby, the occurrence of condensation can be prevented, and the decorative property can be prevented from being impaired. Further, since the ventilation can be sufficiently performed, the increase in the oxygen concentration can be suppressed, so that the growth of the plant can be promoted.

In the present embodiment, the disk fixing portion 41 is provided on the mounting portion 40 of the housing 5. Thereby, when the cultivation tray 3 is fitted to the disk fixing portion 41, the cultivation tray 3 is positioned on the placing portion 40 to restrict its movement in the horizontal direction or the like. Therefore, the position where the cultivation tray 3 is attached to the frame 5 is not changed even if it is repeatedly attached and detached, and is determined to be a fixed position. Therefore, the first area A1 of the cultivation tray 3 radiated from the illumination device 7 always becomes the same position. . Therefore, even in the case of the detachable cultivation tray 3, the plants can be effectively irradiated with light at all times.

(variation)

Next, a modification of the first embodiment will be described. The configuration of the illumination device in the plant cultivation device of the variation is different from that of the first embodiment. Fig. 21 is a view schematically showing light emitted by an illumination device of a plant cultivation device according to another embodiment. Fig. 22 is a view schematically showing an irradiation area of each horizontal plane in the cultivation space by the light irradiated by the illumination device. In Fig. 22, A denotes an irradiation area of light in the front surface 20a (surface along the aa line of Fig. 21 (a)) of the main body portion 20 (cover portion 12) of the cultivation tray 3, and B denotes a level in the cultivation space S. The area of illumination of light in MS2 (the plane along the bb line of Fig. 21(a)).

As shown in FIG. 21, the illuminating device 7 emits light to the cultivation tray 3 from three light sources (not shown). As shown in FIG. 22, in the lid portion 12 of the cultivation tray 3, the medium tanks 9 (the medium accommodation portion 26) are disposed in a row at a predetermined interval in the left-right direction in the main body portion 20. As shown in FIG. 22, the medium accommodating portion 26 is disposed such that the light emitted from the three light sources overlaps the front surface 20a of the main body portion 20.

As shown in Fig. 22, the first region is generated around the medium accommodating portion 26 and the medium accommodating portion 26 by illuminating the specific position between the two medium accommodating portions 26 of the medium containing the medium tank 9 in the front surface 20a. A1. Here, the first region A1 is a region in which the respective irradiation regions of the light emitted from the three light sources included in the illumination device 7 are combined.

The second region A2 on the outer side of the first region A1 is hardly irradiated with light emitted from the three light sources of the illumination device 7. That is, the three light sources are arranged such that the direct light and the diffused light radiated from the light source 50 reach the front surface 20a of the main body portion 20 by the alignment of the optical axis or the light distribution of the diffused light, and the medium containing the medium containing portion 26 is The range of the first region A1 around the medium containing portion 26. The illuminating device 7 having a built-in light source is attached to the casing 5 such that the intensity of light that is applied to the first region A1 including the medium accommodating portion 26 and the medium accommodating portion 26 of the lid portion 12 of the cultivation tray 3 is irradiated. The value of the amount of light is greater than the value of the intensity or amount of light of the second region A2 that is irradiated to the outside of the first region A1 of the lid portion 12 of the cultivation tray 3. Furthermore, the orientation of the optical axes of the three light sources or the light distribution conversion of the diffused light are performed so that the two medium accommodating portions 26 are included in the range in which the irradiation regions of the three light sources in the first region A1 overlap each other.

The light distribution conversion unit of the illuminating device 7 adjusts the angle of the diffused light in the light emitted by the light source so that the irradiation area of the light of the lid portion 12 of the cultivation tray 3 does not spread beyond the outer side of the plant cultivation apparatus 1. Further, by providing the optical axis direction setting means described below, the direction in which the light emitted by the light source is set such that the medium tank 9 (the medium containing portion 26) is located in a region where the irradiation surfaces of the three light sources overlap each other.

[Second Embodiment]

Next, the second embodiment will be described. The configuration of the light source in the second embodiment is different from that in the first embodiment. Fig. 23 (a) is a plan view showing a lighting device of the plant cultivation device of the second embodiment, and Fig. 23 (b) is a view of the cultivation disk viewed from above.

First, the configuration of the cultivation tray 3 will be described. In the lid portion 12 of the cultivation tray 3 of the present embodiment, the medium tanks 9 (the medium storage portions 26) are arranged in a row at a predetermined interval in the left-right direction in the main body portion 20. As shown in FIGS. 13(c) and 13(d), the cultivation tray 3 may have a configuration in which the lid portion 12A and the culture medium tank 9A are integrated.

The illuminating device 7A includes a first light source 50a that emits light of a blue component and a second light source 50b that emits light of a red component. Configuration of the substrate 52 and the light distribution conversion unit 54 and the first embodiment the same. The first light source 50a is, for example, a blue light-emitting diode that emits light having a blue component having a wavelength of 420 to 470 nm. Further, as shown in FIG. 24, the first light source 50a may be a white light-emitting diode including a wavelength of a blue component. The second light source 50b is, for example, a red light emitting diode that emits light having a red component of a wavelength of 640 to 690 nm.

In the illuminating device 7A, the arrangement of the first light source 50a and the second light source 50b is set in accordance with the arrangement of the medium accommodating portion 26 in the cultivation tray 3. In the present embodiment, the first light source 50a and the second light source 50b are disposed corresponding to the configuration in which the medium storage unit 26 is disposed in a row in the cultivation tray 3. Specifically, the first light source 50a is placed on one surface 52a of the substrate 52, and is formed in a row at a predetermined interval along the left-right direction of the casing 5. The second light source 50b is placed on one surface 52a of the substrate 52, and 18 are arranged in a row at a predetermined interval in the left-right direction of the casing 5. The 18 light sources 50a are interposed in the width direction of the casing 5. Two rows are arranged in the row of the first light source 50a. The number of the first and second light sources 50a and 50b may be appropriately set depending on the design.

Fig. 25(a) schematically shows a light emitted by the illumination device, and Fig. 25(b) schematically shows the light emitted by the three light sources of the illumination device in each horizontal plane in the cultivation space (A). ~C) The map of the illuminated area. Fig. 26 is a view schematically showing the values of the intensity or amount of light of each of the horizontal planes (A to C) of the light irradiated by the three light sources of the illumination device.

Fig. 25 (a) is a view seen from the side of the side portions 42 and 44 of the casing 5. In Fig. 25(b), A denotes an irradiation area of light in the front surface 20a of the main body portion 20 (cover portion 12) of the cultivation tray 3, and B denotes an irradiation area of light in the layer MS2 in the cultivation space S, and C denotes The area of illumination of the light in the layer MS1 among the cultivation spaces S. In Fig. 24, the vertical axis represents the value of the intensity or amount of light, and the horizontal axis represents the respective irradiation areas of the light emitted by each of the light sources (A to C) (FA1, FA2, FB1, FB2, FC1, FC2) ).

As shown in Fig. 25 (a), the optical axis of the first light source 50a faces the medium containing portion 26 in the front surface 20a of the main body portion 20 of the cultivation tray 3, and the optical axis of the second light source 50b faces the front surface 20a. A specific position on the front surface 20a around the medium accommodation portion 26. Thereby, the first region A1 is generated around the medium accommodating portion 26 and the medium accommodating portion 26.

The front surface 20a of the main body portion 20 of the lid portion 12 of the cultivation tray 3 irradiates the first region A1 including the medium containing portion 26 with the blue component light emitted from the first light source 50a and the red component emitted from the second light source 50b. Light. In other words, the first region A1 is a region in which the irradiation region FA1 of the light irradiated from the first light source 50a and the irradiation region FA2 of the light irradiated from the second light source 50b are superimposed and combined.

Further, as shown in FIG. 25(b), the irradiation regions of the respective light sources are enlarged in the horizontal direction as the whole overlaps the overlapping portions of the respective irradiation regions as they fall to the horizontal planes C, B, and A. The way it is produced. The reason for this is that the optical axis of each light source is directed toward the medium accommodating portion 26 of the horizontal plane A, and the optical axis of the first light source 50a is directed toward the central portion of the medium accommodating portion 26 vertically below, and the optical axis of the second light source 50b is oriented. A specific position around the medium accommodation portion 26 other than the medium. Thereby, the blue light (first light source 50a) and the red light (second light source 50b) are attached to the first area A1 on the front surface 20a (horizontal plane A) of the main body portion 20 of the lid portion 12 of the cultivation tray 3. Since the central portion of the irradiation region FA1 overlaps, it is effective for the germination of plants to the formation of stems or leaves.

At this time, as shown in FIG. 26, the overlapping portion of the combined region of the irradiation region FA1 and the irradiation region FA2 in the first region A1 around the medium containing portion 26 in the front surface 20a of the main body portion 20 and the first region A1 are included. The second region A2 on the outer side and the other surfaces MS1 and MS2 have larger values of light intensity or light amount. That is, in the front surface 20a (horizontal plane A) of the main body portion 20 of the lid portion 12 of the cultivation tray 3, the region of the central portion of the irradiation region FA1 of the first region A1, and the irradiation region FC1 and the horizontal plane B of the layer MS1 in the horizontal plane C The intensity of light or the amount of light is larger than the area of the central portion of the irradiation area FB1 of the middle layer MS2.

As shown in Fig. 25, the middle layer MS1 and the middle layer MS2 (horizontal planes B and C) are compared with the front surface 20a of the main body portion 20 of the lid portion 12 of the cultivation tray 3 in the horizontal plane A, from the first light source 50a and the second. The irradiation areas FB1, FB2 or the irradiation areas FC1, FC2 of the light irradiated by the light source 50b coincide The area is getting smaller. Thereby, at the middle level MS1 and the middle level MS2 (horizontal planes B and C), the leaves extending outward from the stem in the plant are mainly irradiated with red light effective for the growth of the leaves by the second light source 50b.

At this time, as shown in FIG. 26, in the middle layer MS1 and the middle layer MS2 (horizontal planes B and C), in the irradiation areas FB1, FB2, FC1, FC2, the value of the intensity or amount of light is smaller than the cover of the cultivation tray 3. A repeating portion of the combined region of the irradiation region FA1 and the irradiation region FA2 in the first region A1 of the front surface 20a of the main body portion 12 of 12. Further, in the middle level MS1 and the middle level MS2 (horizontal planes B and C), the area where the intensity of the light or the amount of light is large in the horizontal direction is expanded. In other words, since the light irradiation range can be enlarged in the middle layers MS1 and MS2, the leaves that are developed in the horizontal direction can be sufficiently irradiated with light to promote light synthesis. In the front surface 20a (the medium surface) of the lowermost main body portion 20, a plurality of light irradiation ranges are concentrated to increase the intensity of light or the amount of light to promote germination to the formation of stems or leaves.

In the plant cultivation apparatus 1 disposed indoors, in order to promote the growth of plants, it is preferable to achieve the same environment as the outdoor environment where sunlight is irradiated. Here, it is known that when the bud or stem of a plant grows, a blue component of light is required, and when the leaf of the plant grows, a red component of light is required. For example, a wafer using a light-emitting diode of red, green, and blue components is used as one light source to obtain a white white light-emitting diode, or a color of a blue light-emitting diode and a red light-emitting diode is used. Synthetic lighting device.

However, in the white light-emitting diode having the above-described configuration, in order to obtain a blue component or a red component suitable for the growth of a plant, it is necessary to increase the amount of light, and it is too bright for the human eye. Therefore, it is not possible to view indoors, resulting in damage to the decoration. Further, in the prior plant cultivation apparatus including the blue light-emitting diode and the red light-emitting diode, the blue light-emitting diode is emitted during the germination of the plant, and the red light-emitting diode is made during the growth period of the leaf. Glowing. Therefore, it is necessary to control the lighting timing of the blue light-emitting diode and the red light-emitting diode, resulting in troublesome operation.

In the present embodiment, the same operational effects as those of the first embodiment are produced. Again, in In the illuminating device 7A, the first light source 50a that emits a blue component and the second light source 50b that emits a red component are included, and the optical axis of the first light source 50a mainly faces the medium accommodating portion 26 of the cultivation tray 3. The optical axis of the second light source 50b mainly faces the region on the outer side of the medium accommodating portion 26 in the front surface 20a (a specific position on the front surface 20a excluding the medium accommodating portion 26). In the plant cultivation apparatus 1, the blue component and the red component light can be irradiated to the plant at a high intensity during the germination period, and the leaf can be mainly irradiated with the red component light when the plant grows and the leaves are stretched. Therefore, it is possible to promote the growth of plants.

Further, since it is not necessary to switch the light source according to the growth of the plant as in the prior plant cultivation apparatus, the operability of the user can be improved.

(variation)

Next, a modification of the second embodiment will be described. 27(a) and 27(b) are views showing a modification of the illumination device of the plant cultivation device of the second embodiment. As shown in Fig. 27 (a), in the lid portion 12 of the cultivation tray 3, three medium tanks 9 (the medium containing portion 26) are arranged in a zigzag manner in the main body portion 20. With respect to the configuration of the cultivation tray 3, each of the light sources 50a and 50b of the illumination device 7A is configured as follows.

A group (first light source group) including a plurality of light sources of the plurality of first light sources 50a is disposed in a vertical direction with respect to one medium accommodating portion 26, and is disposed between the first light source group and the first light source group. The group of the light sources of the second light source 50b (the second light source group) is arranged in a zigzag manner between the first light source group and the second light source group.

As shown in Fig. 27 (b), in the lid portion 12 of the cultivation tray 3, four medium tanks 9 (the medium storage portion 26) are arranged in a zigzag shape in the main body portion 20. With respect to the configuration of the cultivation tray 3, each of the light sources 50a and 50b of the illumination device 7A is configured as follows.

The second light source 50b is attached to one surface 52a of the substrate 52, and is formed in a row at a predetermined interval along the left-right direction of the casing 5. The first light source 50a is placed on one surface 52a of the substrate 52, and 18 are arranged in a row at a predetermined interval in the left-right direction of the casing 5. The 18 light sources 50a are arranged in the width direction of the casing 5. Two rows are arranged in the row of the second light source 50b.

[Third embodiment]

Next, a third embodiment will be described. The configuration of the illumination device in the third embodiment is different from that in the first and second embodiments. Fig. 28 (a) is a plan view showing an illumination device of the plant cultivation device according to the third embodiment, and Fig. 28 (b) is a view of the cultivation disk viewed from above.

First, the configuration of the cultivation tray 3 will be described. In the lid portion 12 of the cultivation tray 3 of the present embodiment, the medium tanks 9 (the medium storage portions 26) are arranged in a row at a predetermined interval in the left-right direction in the main body portion 20. As shown in FIGS. 13(c) and 13(d), the cultivation tray 3 may have a configuration in which the lid portion 12A and the culture medium tank 9A are integrated.

The illumination device 7B includes an illumination unit 60. The illuminating unit 60 is provided in accordance with the number of the medium accommodating portions 26 provided in the cultivation tray 3, and in the present embodiment, three are disposed. Each of the illumination units 60 includes a first light source 50a that emits light of a blue component and a second light source 50b that emits light of a red component. The first light source 50 is, for example, a blue light emitting diode that emits light having a blue component having a wavelength of 420 to 470 nm. The second light source 50b is, for example, a red light emitting diode that emits light having a red component of a wavelength of 640 to 690 nm. The first light source 50a and the second light source 50b are, for example, bullet-type light-emitting diodes.

In the illuminating device 7B, the arrangement of the illuminating unit 60 is set in accordance with the arrangement of the medium accommodating portion 26 in the cultivation tray 3. In the present embodiment, the illuminating unit 60 is disposed along the left-right direction of the casing 5 as an example in accordance with the configuration in which the medium accommodating portion 26 is disposed in a row in the cultivation tray 3.

Fig. 29 is a view showing the configuration of an illuminating unit. Fig. 29 (a) is a plan view showing an illuminating unit, and Fig. 29 (b) is a view showing a cross-sectional view taken along line b-b in Fig. 29 (a). As shown in FIGS. 29( a ) and 29 ( b ), the illumination unit 60 includes a first light source 50 a , a second light source 50 b , a substrate 62 , and a fixing portion (optical axis direction setting device) 64 .

The fixing portion 64 includes a plurality of (here, 13) recesses 66 for accommodating the first light source 50a and the second light source 50b. The concave portion 66 is disposed in accordance with the arrangement of the first light source 50a and the second light source 50b. As shown in Fig. 29 (a), in the illumination unit 60, the first light source 50a is arranged on the imaginary circle at equal intervals. There are multiple (eight here). The second light source 50b is disposed in plural (here, five), and is disposed at the center of the virtual circle in which the first light source 50a is disposed, and is disposed outside the virtual circle on which the first light source 50a is disposed. There are four positions in the opposite position. Specifically, the second light source 50b disposed on the outer side of the virtual circle is disposed on a straight line passing through the center of the virtual circle and orthogonal to each other. The concave portion 66 is disposed corresponding to the arrangement of the first light source 50a and the second light source 50b.

Returning to FIG. 29( b ), the first light source 50 a and the second light source 50 b accommodated in the concave portion 66 are connected to the substrate 62 via the wiring 51 . Each of the concave portions 66 sets the optical axes of the first light source 50a and the second light source 50b. Specifically, the concave portion 66 of the optical axis direction setting device is such that the optical axes of the first light source 50a and the second light source 50b are respectively directed toward the center portion of the first region A1 including the periphery of the medium containing portion 26 of the cultivation tray 3. The way is formed. In other words, the optical axes of the first light source 50a and the second light source 50b are set by arranging the first light source 50a or the second light source 50b in the concave portion 66 of the fixing portion 64. The optical axis direction setting means is a cultivation tray 3 and a culture tank which are directed downward in the direction of the optical axis of each of the plurality of light sources 50a and 50b of the illumination device 7B (the radiation axis of the light traveling mainly by the light sources 50a and 50b). The setting of 9 (the medium accommodating portion 26) may be performed. The optical axis direction setting means may be, for example, a configuration in which a socket fixed to a light source of the illumination device is tilted, or a rotation (shaking head) mechanism is provided in the socket. Other aspects of the optical axis direction setting device will be described later.

Fig. 30(a) schematically shows a light emitted by the illumination device, and Fig. 30(b) schematically shows the light emitted by the three light sources of the illumination device in each horizontal plane in the cultivation space (A). ~C) The map of the illuminated area. Fig. 31 is a view schematically showing the values of the intensity or amount of light of each of the horizontal planes (A to C) of the light irradiated by the illumination device in the cultivation space.

In Fig. 30(b), A denotes an irradiation area of light in the front surface 20a of the main body portion 20 (cover portion 12) of the cultivation tray 3, and B denotes an irradiation area of light in the layer MS2 in the cultivation space S, and C denotes The irradiation area of the light in the layer MS1 in the cultivation space S. In Fig. 31, the vertical axis represents the intensity of light or the amount of light, and the horizontal axis represents each of the respective horizontal planes (A to C). (FA1, FA2, FB1, FB2, FC1, FC2).

As shown in FIG. 30(a), the optical axes of the first light source 50a and the second light source 50b are directed toward the central portion of the medium containing portion 26 in the front surface 20a of the main body portion 20 of the cultivation tray 3. Thereby, the first region A1 is generated around the medium accommodating portion 26 and the medium accommodating portion 26. In other words, the optical axis of each light source is directed to the medium accommodating portion 26 of the horizontal plane A, and the optical axis of the first light source 50a is directed toward the central portion of the medium accommodating portion 26 vertically below, and the optical axis of the second light source 50b is directed toward the medium accommodating portion 26. The central portion has substantially the same position at the point where the optical axes in the horizontal plane A intersect.

The front surface 20a of the main body portion 20 of the lid portion 12 of the cultivation tray 3 is irradiated with light of a blue component emitted from the first light source 50a and emitted by the second light source 50b in the first region A1 including the medium containing portion 26. The light of the red component. In other words, the first region A1 is a region in which the irradiation region FA1 of the light irradiated from the first light source 50a and the irradiation region FA2 of the light irradiated from the second light source 50b are superimposed and combined.

Further, as shown in FIG. 30(b), the irradiation areas of the respective light sources gradually expand in the horizontal direction as they fall to the horizontal planes C, B, and A, and do not overlap in the horizontal plane C, but overlap with the horizontal plane B and are irradiated at the horizontal plane A. The areas overlap in a substantially concentric shape. The reason for this is that the positions at the points where the optical axes of the respective light sources intersect in the horizontal plane A are substantially the same. The level MS1 of the irradiation area of each light source coincides with the horizontal plane C. The level MS2 is smaller than the horizontal plane A in the horizontal plane B, that is, the front surface 20a of the body portion 20 of the lid portion 12 of the cultivation tray 3. In other words, the region where the irradiation region FB1 of the light irradiated from the first light source 50a and the second light source 50b overlaps the irradiation region FB2 is smaller than the region where the irradiation region FA1 of the light and the irradiation region FA2 overlap. Thereby, the front surface 20a (horizontal plane A) of the main body portion 20 of the lid portion 12 of the cultivation tray 3, the blue light (first light source 50a) and the two red lights (the second light source 50b) are in the FA1 of the first region A1. The central part coincides, so it is effective for the germination of plants to the formation of stems or leaves.

At this time, as shown in FIG. 31, in the front surface 20a of the main body portion 20, the synthetic region of the irradiation region FA1 and the irradiation region FA2 in the first region A1 around the medium containing portion 26 is included. The repeating portion has a larger value of light intensity or light amount than the second region A2 on the outer side of the first region A1 and the other surfaces MS1 and MS2. That is, in the front surface 20a (horizontal plane A) of the main body portion 20 of the lid portion 12 of the cultivation tray 3, the region of the central portion of the FA1 of the first region A1, the FC1 of the MS1 of the irradiation region C, and the FB1 of the MS2 of the irradiation region B. Compared with the area of the central part, the value of the intensity or amount of light is large.

As shown in Fig. 30, in the middle layer MS2, the irradiation areas FB1 and FB2 of the light irradiated from the first light source 50a and the second light source 50b are overlapped with the front surface 20a of the main body portion 20 of the lid portion 12 of the cultivation tray 3. The area is small, and in the middle level MS1, the irradiation areas FC1 and FC2 of the light irradiated from the first light source 50a and the second light source 50b do not overlap.

As shown in FIG. 31, in the middle layer MS1 and the middle layer MS2 (horizontal planes B and C), the area where the intensity of light or the amount of light is large in the horizontal direction is expanded. In the middle level MS1 and the middle level MS2 (horizontal planes B and C), the values of the light intensity or the amount of light in the irradiation areas FB2 and FC2 corresponding to the upper side of the second area A2 are larger than the front surface 20a of the main body unit 20. Thereby, at the middle level MS1 and the middle level MS2 (horizontal planes B and C), the leaves extending outward from the stem in the plant are irradiated with light of a red component having a higher light intensity by the second light source 50b. In other words, since the light irradiation range can be enlarged at the middle level, the leaves that are developed in the horizontal direction are sufficiently irradiated with light to promote light synthesis. In the front surface 20a (the medium surface) of the main body portion 20 which is the lowermost layer, a plurality of light irradiation ranges are concentrated to increase the intensity of light or the amount of light, thereby promoting germination to the formation of stems or leaves.

As described above, in the present embodiment, the same operational effects as those of the first embodiment are exhibited. Further, in the present embodiment, the illumination unit 60 of the illumination device 7B includes the first light source 50a that emits blue component light and the second light source 50b that emits light of the red component, the first light source 50a and the second light source. The 50b is arranged as shown in Fig. 29(a), and the optical axes of the first light source 50a and the second light source 50b are directed toward the medium containing portion 26 of the cultivation tray 3. In the plant cultivation apparatus 1, the intensity of the light or the amount of light in the first region A1 of the front surface 20a of the main body portion 20 of the cultivation tray 3 is increased, and the second region is irradiated to the outside of the first region A1. A2 The intensity of the light or the amount of light of the illumination areas FB2, FC2 in the upper middle layers MS1, MS2 is greater than the intensity or amount of light of the illumination area FA2 of the second area A2 of the front surface 20a of the main body portion 20 of the cultivation tray 3. The value. Therefore, in the germination period, the blue component and the red component light can be irradiated to the plant with high intensity, and when the plant grows and the leaf is stretched, the leaf can be mainly irradiated with the red component light. Therefore, it is possible to promote the growth of plants. Further, since the intensity of the light or the amount of light of the irradiation regions FB2 and FC2 in the middle layer MS1 and the middle layer MS2 is large, light synthesis of the leaves of the plants can be promoted.

In the present embodiment, the illumination unit 60 includes a fixing portion 64 as an optical axis direction setting means. By having the configuration in which the optical axes of the first and second light sources 50a and 50b are set, the layout of the medium tank 9 (the medium containing unit 26) disposed in the lid portion 12 of the cultivation tray 3 is When a plurality of the cover portions 12 are replaced and used, the illumination device 7B may be replaced, and the direction of the optical axes of the light sources 50a and 50b may be optimal depending on the position of the culture medium tank 9 (the medium storage portion 26). The direction of the light.

(variation)

Next, a modification of the third embodiment will be described. 32(a) and 32(b) are views showing a modification of the illumination device of the plant cultivation device according to the third embodiment. As shown in Fig. 32 (a), in the lid portion 12 of the cultivation tray 3, three medium tanks 9 (the medium storage portion 26) are arranged in a zigzag manner in the main body portion 20. In the configuration of the cultivation tray 3, three illumination units 60 are disposed above the medium storage unit 26.

As shown in Fig. 32 (b), in the lid portion 12 of the cultivation tray 3, four medium accommodation portions 26 are arranged in a zigzag manner in the main body portion 20. In such a configuration, the illuminating unit 60A is disposed four above the medium accommodating portion 26 . The illumination unit 60A includes three first light sources 50a arranged in a row at a predetermined interval in the left-right direction, and two second light sources 50b interposed in the width direction. The light source 50a is arranged in a row at a predetermined interval in the left-right direction. The first light source 50a and the second light source 50b are arranged in a zigzag manner.

Further, in the above embodiment, instead of the first light source 50a and the second light source 50b, a light source 50 as a white light emitting diode may be provided.

Further, in the present embodiment, the optical axes of the first light source 50a and the second light source 50b (light source 50) are directed toward the first region A1 by the concave portion 66 of the fixing portion 64, but the first light source 50a and the second light source 50b are provided. For example, the optical axis of the light source 50 may be set to a direction by tilting or rotating (rotating) the direction of the light source unit of the lighting fixture. The device that directs the optical axis toward the first region A1 may also be a reflector or other configuration. Further, the first light source 50a and the second light source 50b (light source 50) may be disposed such that their optical axes are directed toward the first region A1.

The present invention is not limited to the above embodiment. In the above-described embodiment, the configuration in which the outer shape of the frame 5 and the inner shape are substantially rectangular is described as an example. However, the outer shape and the inner shape of the frame are not particularly limited.

In the above-described embodiment, the configuration in which the frame 5 has the openings 5a and 5b and the frame 5 is opened to both sides has been described as an example. However, the frame may be closed on one side. The frame may be provided with at least an opening in which the cultivation tray 3 can be replaced.

In the above embodiment, the configuration in which the casing 5 is annular is described as an example, but the casing may have, for example, a U shape or an L shape. In the case where the frame has a U shape, the cultivation tray 3 may be placed on the frame or the frame may be placed so as to cover the cultivation tray 3.

In the above embodiment, the configuration in which the inner surfaces 42a and 44a of the side portions 42 and 44 and the inner surface 46a of the top plate portion 46 are the reflecting surfaces has been described as an example, but the side portions 42 and 44 and the top plate may be used. A member such as a sheet having a high reflectance (for example, a reflectance of 50 to 100%) is disposed inside the portion 46.

The optical axis direction setting device can be used as a fixing device for fixing the lighting fixture to the inner surface 46a of the top plate portion 46 of the casing 5, and as a fixing means for the lighting fixture in the ceiling portion 46 of the casing 5. Various aspects such as a state built in the accommodating space K provided in the hollow portion. Fig. 33 is a view showing a modification of the illumination device of the plant cultivation device according to the first embodiment. As shown in FIG. 33, in the illumination device 7C, the light distribution conversion unit 54A is set to be capable of It is sufficient to swing (rotate) around the shaft member AX1. The optical axis direction setting means is constituted by the light distribution conversion portion 54A and the shaft member AX1. The shaft member AX1 extends in the left-right direction of the frame 5. By the optical axis direction setting means, the illumination device 7C can incline the optical axis of the light radiated from the light source 50, thereby causing the light to be irradiated to a specific position on the cultivation tray 3.

Fig. 34 is a view showing a modification of the illumination device of the plant cultivation device according to the second embodiment. As shown in FIG. 34, in the illumination unit 60B, the fixing portion 64 is configured to be able to swing (rotate) around the shaft member AX2. The optical axis direction setting means is constituted by the fixing portion 64 and the shaft member AX2. By the optical axis direction setting means, the illumination portion 60B tilts the optical axis of the light emitted from the light sources 50a, 50b, thereby illuminating the light to a specific position on the cultivation tray 3.

Fig. 35 is a view showing a modification of the illumination device of the plant cultivation device according to the second embodiment. As shown in FIG. 35, in the illumination unit 60C, a spherical protrusion 68 is provided on the upper portion of the fixing portion 64. The projection 68 is inserted into the recess 70 of the frame 5 and pivoted by the recess 70. Thereby, the illumination unit 60C is configured to be pivotable about the protrusion 68 (can be rotated around the protrusion 68). The optical axis direction setting means is constituted by the protruding portion 68 of the fixing portion 64 and the concave portion 70. By the optical axis direction setting means, the illumination portion 60C inclines the optical axis of the light radiated from the light sources 50a, 50b, thereby causing the light to be irradiated to a specific position on the cultivation tray 3.

Fig. 36 is a view showing a modification of the illumination device of the plant cultivation device according to another embodiment. As shown in FIG. 36, the illuminating device 7D includes a light source 72, a substrate 74 on which the light source 72 is disposed, and a light distribution conversion portion 76 that converts the light diffusion direction of the cultivation disk 3. The light distribution conversion unit 76 has a curved reflection surface 76f and emits light from the transmission plate 80. A spherical protrusion 82 is provided on the upper portion of the substrate 74. The projection 82 is inserted into the recess 84 of the frame 5 and pivoted by the recess 84. Thereby, the light distribution conversion unit 76 is configured to be pivotable about the protrusion 82. The optical axis direction setting means is constituted by the protruding portion 68 of the fixing portion 64 and the concave portion 70. By the optical axis direction setting means, the illumination device 7D can incline the optical axis of the light radiated from the light source 72, thereby causing the light to be irradiated to a specific position on the cultivation tray 3.

Figure 37 is a view showing a modification of the illumination device of the plant cultivation device according to another embodiment. Picture. As shown in FIG. 37, the illumination device 7E is provided with a light distribution conversion unit 86 that converts the direction in which the light emitted by the light source (not shown) diffuses in the front end side of the main body portion 88. The illumination device 7E is supported by the support unit 90. The lighting device 7E is set to be pivotable relative to the support portion 90. The optical axis direction setting means is constituted by the light distribution conversion unit 86 (main body portion 88) and the support portion 90. By the optical axis direction setting means, the illumination device 7E can incline the optical axis of the light radiated from the light source, thereby causing the light to be irradiated to a specific position on the cultivation tray 3.

1‧‧‧plant cultivation equipment

3‧‧‧Cultivating plate (cultivation department)

5‧‧‧ frame

5a, 5b‧‧‧ openings

10‧‧‧Storage Department

12‧‧‧ 盖部

16‧‧‧ side

20‧‧‧ Body Department

20a‧‧‧ positive

24a‧‧‧Protruding

26‧‧‧Media Containment Department

40‧‧‧Loading Department

40a‧‧‧Loading surface

41‧‧‧ Disk fixing department

42, 44‧‧‧ side

42a‧‧‧ inner surface

46‧‧‧ top board

46b‧‧‧ upper surface

48‧‧‧heating slit

S‧‧‧ cultivation space

Claims (10)

A plant cultivation apparatus comprising: a cultivation unit including a storage portion for containing a culture medium capable of planting the plant; and an illumination device including a plurality of light sources that emit light toward the cultivation portion via at least a portion of the open cultivation space; a plurality of light sources are disposed such that a value of the intensity or amount of light of the first region including the accommodating portion and the periphery of the accommodating portion that is irradiated onto the cultivating portion is larger than a value of the first region that is irradiated onto the cultivating portion The position of the intensity of the light or the amount of light of the second region on the outer side. The plant cultivation apparatus according to claim 1, wherein the accommodating portion of the cultivating portion is disposed at a position overlapping a region of light irradiated from one of the plurality of light sources and a region of light irradiated from the other light source. The plant cultivation apparatus according to claim 1 or 2, wherein the optical axis of the light source is directed to the first region including the accommodating portion. The plant cultivation apparatus according to claim 3, wherein the optical axis direction setting means for setting the direction of the optical axis of the light source is such that the optical axis of the light source faces the first region including the accommodating portion. The plant cultivation apparatus according to any one of claims 1 to 4, wherein a value of the light intensity or the amount of light irradiated to the first region including the accommodating portion is larger than the first region and the cultivating portion is The intensity of the light or the amount of light of the light in the middle of the level is illuminated at a height position between the illumination devices. The plant cultivation apparatus according to any one of claims 1 to 5, wherein the intensity or amount of light of the light irradiated to the horizontal middle layer at a height position between the cultivating portion and the illuminating device above the second region The value is larger than the value of the intensity or amount of light of the light irradiated to the second region. The plant cultivation apparatus according to any one of claims 1 to 6, wherein each of the wavelengths of the light emitted by the plurality of light sources has a blue component or a red component, and the light is irradiated to the first region The wavelength includes the blue component more than the red component, and the wavelength of the light irradiated on the horizontal level at a height position between the cultivating portion and the illuminating device above the second region includes the red component In the above blue component. The plant cultivation apparatus according to claim 7, wherein the optical axis of the light source that emits light having a wavelength of the blue component toward the first region and emits light having a wavelength of the red component is emitted The middle layer is oriented above the second region. A plant cultivation apparatus comprising: a cultivation unit including a storage portion for containing a culture medium capable of planting the plant; and an illumination device that emits light toward the cultivation portion via at least a part of the open cultivation space; and the illumination device includes: plural a light source that emits the light, and a light distribution conversion device that concentrates the light emitted by the plurality of light sources on the cultivating portion. A lighting device, such as the plant growing device of any one of claims 1 to 9.