JP5017523B2 - Package growing package LED, plant growing light source unit and plant growing apparatus - Google Patents

Description

  The present invention relates to a package LED suitably used for plant growth, and a plant growth light source unit and a plant growth apparatus using the package LED.

  Conventionally, as a light source for plant growth, as shown in Patent Document 1, a light source using a plurality of LEDs has been considered. Specifically, this light source is configured by providing a plurality of LEDs on a base at predetermined equal intervals (for example, 10 to 30 mm pitch).

  However, in the case where the LED is installed and configured as described above, it is necessary to set a large distance between the light source and the plant in order to sufficiently mix the light emitted from each LED. Moreover, since the light emission color (RGB) is different for each LED, there is a limit to narrowing the light emission region of each color, and there is a problem that unevenness occurs in the light hitting the plant depending on the irradiation place. In particular, since the distance between the plant and the light source changes as the plant grows, there is a problem that the irradiation mode varies depending on the growth stage of the plant. Specifically, as the plant grows, the distance between the light source and the plant decreases, and as the plant grows, light that is not sufficiently mixed in color is irradiated.

In addition, although it is possible to fully mix the light from each LED using a diffuser plate, there exists a problem that light is lost with a diffuser plate and it is difficult to obtain sufficient intensity | strength.
JP 2006-320314 A

Therefore, the present invention has been made as a result of diligently examining the intensity ratio of red light, green light and blue light suitable for plant growth while solving the above problems all at once. In addition to sufficiently mixing the colors of light and irradiating the plant with light suitable for plant growth, the main intended task is to make the LED circuit common and facilitate wiring .

That is, the plant growing light source unit according to the present invention is provided in front of a plurality of plant growing package LEDs, an LED substrate that supports the package LED, and an LED mounting surface of the LED substrate, and each package LED has a lens. A lens substrate on which a portion is formed, and the LED substrate and a holding member that holds the lens substrate, and the package LED has a red light emitting element, a green light emitting element, and a blue light emitting element sealed in one package. The ratio of the number of red light emitting elements, green light emitting elements and blue light emitting elements sealed in the package is 4: 1: 1, so that the intensity of red light, green The ratio of the light intensity and the blue light intensity is approximately 4: 1: 1, and the number of green light emitting elements connected in series in the package and the green light emitting elements connected in series 2n, 2n red light emitting elements sealed in the package are connected in series, and the circuit configuration of the green light emitting element and the blue light emitting element is the length of the LED substrate. LED arrays connected in series for the number of package LEDs provided along the direction are connected in parallel for the number of package LEDs provided along the short direction of the LED substrate. The circuit configuration is such that an LED array connected in series by twice the number of package LEDs provided along the longitudinal direction of the LED substrate is two times the number of package LEDs provided along the short direction of the LED substrate. It is characterized in that it is configured by parallel connection in double .

If it is such, the red light emitting element, the green light emitting element, and the blue light emitting element are sealed in one package LED, and the light emitted from each light emitting element is emitted regardless of the distance between the light source and the plant. It is possible to mix colors sufficiently. In addition, since color mixing can be performed without using a diffusion plate, loss of light from each light emitting element can be reduced. Furthermore, by using a plurality of such package LEDs, it is possible to irradiate a plant with mixed light with high density. In addition, since the ratio of the intensity of red light, the intensity of green light, and the intensity of blue light is about 4: 1: 1, the plant can be irradiated with light suitable for plant growth. The ratio of the number of red light emitting elements, the number of green light emitting elements and the number of blue light emitting elements sealed in the package is 4: 1: 1, and each color light is set to the above ratio with a simple configuration. be able to. At this time, the sizes of the light emitting elements of the respective colors are substantially the same, and the ratio of the light emitting area of the red light emitting element, the light emitting area of the green light emitting element, and the light emitting area of the blue light emitting element in the package LED is approximately 4: 1: 1.

Thus, according to the present invention, each color light is sufficiently mixed with a simple configuration, and not only the plant is irradiated with light suitable for plant growth, but also an LED circuit is shared and wiring is easily performed. it can be.

  Next, a plant growing apparatus 100 using the package LED 21 according to the present invention will be described with reference to the drawings. 1 is a schematic configuration diagram of the plant growing apparatus 100 of the present embodiment, FIG. 2 is a plan view of the light source unit 103, FIG. 3 is an end view taken along line AA of the light source unit 103, and FIG. 5 is a schematic configuration diagram of the package LED 21, FIG. 6 is a circuit configuration diagram of the package LED 21, FIG. 7 is a circuit configuration diagram of the green light emitting element 21G or the blue light emitting element 21B, and FIG. 8 is a circuit configuration diagram of the red light emitting element 21R. 9 is a plan view of the lens substrate 3. FIG. 10 is a diagram schematically showing the size of the LED substrate 2 and the lens substrate 3. FIG. 11 is an exploded perspective view of the LED substrate 2, the lens substrate 3 and the holding member 4. 12 is a perspective view showing a state where only one lens substrate 3 is removed, FIG. 13 is a partially enlarged sectional view of the LED substrate 2, the lens substrate 3 and the holding member 4, and FIG. 14 is a partially enlarged sectional view showing the cooling circulation mechanism 7. It is.

<1. Device configuration>
As shown in FIG. 1, the plant growing apparatus 100 according to the present embodiment has a plurality of shelf columns 101 erected on the floor surface (not shown) of the plant growing room R, and the plant growth supported by the shelf columns 101. And a light source unit 103 for irradiating light to the plants growing on the shelf 102.

  A substantially box-shaped liquid fertilizer pallet 104 capable of holding liquid fertilizer therein and a cultivation pallet 105 placed on the liquid fertilizer pallet 104 are supported on the shelf 102 in a shelf shape. In the present embodiment, the shelf 102 has a plate shape, but for example, a plurality of pipes may be arranged in the horizontal direction. Further, the cultivation pallet 105 allows a plurality of plants to be cultivated at a time.

  The light source unit 103 is provided on the lower surface of the shelf 102 so as to be substantially parallel to the upper surface of another shelf 102 provided below the shelf 102. Therefore, an attachment portion 106 for detachably attaching the light source unit 103 is provided on the lower surface of the shelf portion 102.

  The attachment portions 106 are rails provided so as to be paired one by one in the width direction (left-right direction) of the shelf portion 102, for example. This rail has a substantially L-shaped cross section, and is provided such that the bent portion is on the lower side and the L-shaped concave portion faces the inside of the shelf portion 102. With such a configuration, the light source unit 103 is slid on the rail and placed on the bent portion, so that the light source unit 103 is attached above the shelf portion 102.

<2. About Light Source Unit 103>
As shown in FIGS. 2 and 3, the light source unit 103 has a substantially rectangular shape in plan view, and by attaching a plurality of LED substrates 2 and a plurality of lens substrates 3 to one surface side of the holding member 4. It is configured.

  The LED substrate 2 supports a plurality of package LEDs 21 (hereinafter also simply referred to as LEDs 21) that irradiate plants with light for growth. Specifically, as shown in FIG. 4, the LED substrate 2 has a substantially rectangular shape in plan view, and a plurality of surface-mounted package LEDs 21 are provided on one plane (hereinafter referred to as an LED mounting surface). It has been. These package LEDs 21 are provided in a matrix form at substantially equal intervals in the vertical and horizontal directions.

  As shown in FIG. 5, the package LED 21 is formed by providing a red light emitting element 21R, a green light emitting element 21G, and a blue light emitting element 21B in one package substrate 211, and sealing with a transparent resin 212. A positive terminal and a negative terminal are provided for each color.

  The package LED 21 of the present embodiment emits mixed light in which light of at least two colors of red light, green light, or blue light is mixed. In particular, in this embodiment, the intensity of red light, the intensity of green light, and The intensity ratio of blue light is configured to be approximately 4: 1: 1. Specifically, as shown in FIGS. 5 and 6, the ratio of the number of red light emitting elements 21R, the number of green light emitting elements 21G and the number of blue light emitting elements 21B provided in one package substrate 211 is 4: The ratio is 1: 1. At this time, the sizes of the light emitting elements 21R, 21G, and 21B of the respective colors are substantially the same, and the ratio of the light emitting area of the red light emitting element 21R, the light emitting area of the green light emitting element 21G, and the light emitting area of the blue light emitting element 21B in the package LED 21 is , Approximately 4: 1: 1. The four red light emitting elements 21R provided in the package LED 21 are connected in series via bonding wires two by two. Thus, by connecting two red light emitting elements 21R in series, the forward voltage (about 2.0 V × 2) of the red light emitting elements 21R connected in series is changed to the forward voltage (about 2.0 V) of the green light emitting element 21G. 3.5V) and the forward voltage (about 3.5V) of the blue light emitting device as close as possible, the LED circuit can be shared, wiring can be facilitated, and the voltage can be increased. Loss can be reduced. By reducing the voltage loss, it is possible to solve the problem that a wasteful voltage corresponding to the loss is converted into heat in the LED 21, and as a result, the life of the LED 21 is shortened.

  In the LED substrate 2 using such a package LED 21, the circuit configurations of the green light emitting element 21G and the blue light emitting element 21B are, for example, package LEDs 21 provided along the longitudinal direction of the LED substrate 2, as shown in FIG. Are connected in series (M columns) in parallel to the number of package LEDs 21 provided along the short direction of the LED substrate 2.

  Further, for example, as shown in FIG. 8, the circuit configuration of the red light emitting element 21R includes LED rows that are connected in series (2N rows) twice as many as the number of package LEDs 21 provided along the longitudinal direction of the LED substrate 2 (2N rows). It is configured by connecting in parallel (2M rows) twice the number of package LEDs 21 provided along the short direction of the LED substrate 2.

  The LED substrate 2 is formed with a plurality of first through holes 2a (not shown in FIG. 4) penetrating the LED mounting surface and the back surface. The first through holes 2a will be described later. In addition, a plurality of fixing holes 2b for fixing with a fixture 5 described later are formed on both sides in the longitudinal direction of the LED substrate 2.

  As shown in FIG. 9, the lens substrate 3 is provided in front of the LED mounting surface of the LED substrate 2, and has a plurality of lens portions 31 that collect the light from the LEDs 21 and guide it to the plants on the shelf 102. is there. Specifically, the lens substrate 3 has a substantially rectangular shape in plan view, and in a state of being fixed to the holding member 4, a plurality of lens portions 31 are formed corresponding to each LED 21 of the LED substrate 2. Yes. At this time, the optical axis of the LED 21 and the optical axis of the lens unit 31 are substantially matched. The light incident surface (back surface) of the lens substrate 3 is provided in contact with the light emission surface (upper surface) of the LED 21 so that substantially all of the light emitted from the LED 21 can be condensed by the lens unit 31. In addition, by providing mechanical play (for example, a gap of about 0.2 mm) between the light incident surface (back surface) of the lens substrate 3 and the light emitting surface (upper surface) of the LED 21, manufacturing errors and assembly errors of each component are provided. May be absorbed so that it can be easily mass-produced.

  The lens substrate 3 is formed with a plurality of second through holes 3a penetrating the light incident surface (back surface) and the light emitting surface (front surface). The second through holes 3a will be described later. In addition, a plurality of fixing holes 3b for fixing with a fixture 5 described later are formed on both sides of the lens substrate 3 in the short direction. In FIG. 9, the fixing holes 3b are provided on both sides in the short direction, but the present invention is not limited to this, and may be provided, for example, in a substantially central part in the longitudinal direction. Specifically, the fixing holes 3b may be provided on both sides of the substantially central portion in the longitudinal direction. Thereby, when the elongate lens board | substrate 3 is used, it can prevent that the center part of a longitudinal direction bends, and the lens performance falls by the lens board | substrate 3 bending at the center part of a longitudinal direction. Can be suitably prevented.

  Further, as shown in FIG. 10, the size of the lens substrate 3 is substantially the same as the size obtained by equally dividing the lens substrate 3 into a plurality of portions so as to be orthogonal to both sides fixed to the holding member 4. In FIG. 10, the size of the lens substrate 3 is shown slightly smaller for easy understanding.

  As shown in FIGS. 2 and 3, the holding member 4 is configured to fix the plurality of LED substrates 2 and the plurality of lens substrates 3, and includes a base frame body 41 having a substantially box shape with one surface opened, It consists of two beam frames 42 that are horizontally mounted so as to equally divide the side wall 412 in the short direction (other direction) so as to be parallel to the side wall 411 in the longitudinal direction (one direction) of the base frame body 41. The base frame body 41 and the beam frame 42 form a pair of holding frames, and the LED substrate 2 and the lens substrate 3 are bridged and fixed to the holding frames.

  Specifically, at least the side wall 411 in the longitudinal direction (one direction) of the base frame body 41 has an L-shaped cross section as shown in the partially enlarged view of FIG. Then, the LED substrate 2 and the lens substrate 3 are fixed to the bent portion 4111 of the side wall 411. 2 and 3, the fixture 5 is not shown.

  As shown in FIG. 3 in particular, the beam frame 42 is a long one having a substantially U-shaped cross section, and a short portion of the base frame body 41 so that the bottom portion 421 is outside the opening of the base frame body 41. It is fixed to both side walls 412 in the hand direction. Then, the LED substrate 2 and the lens substrate 3 are fixed to the bottom 421 of the beam frame 42.

  The holding member 4, specifically, the bent portion 4111 of the side wall 411 and the bottom portion 421 of the beam frame 42 are formed with fixing holes 4 a corresponding to the fixing holes 2 b of the LED substrate 2.

  In addition, slide portions 413 that are portions to which the LED substrate 2 and the lens substrate 3 are not attached are formed at both ends in the longitudinal direction of the base frame body 41 so as to be slidable on the attachment portion 106 (rail) of the shelf portion 102. (See FIG. 2).

  In such a holding member 4, the LED substrate 2 and the lens substrate 3 are bridged and fixed to one of the side walls 411 of the base frame body 41 and the beam frame 42 adjacent to the side wall 411. The LED substrate 2 and the lens substrate 3 are bridged between the two beam frames 42 and fixed. Further, the LED substrate 2 and the lens substrate 3 are bridged and fixed to the other side wall 411 of the base frame body 41 and the beam frame 42 adjacent to the side wall 411. At this time, both sides of the LED substrate 2 and both sides of the lens substrate 3 are attached to the base frame 41 and the beam frame 42 from the outside by the fixture 5.

  In a state where the holding member 4 is attached to the attaching portion 106 of the shelf portion 102, the holding member 4 is provided along a substantially horizontal direction, and the LED substrate 2 and the lens substrate 3 are vertically below the holding member 4. To be fixed by the fixture 5. Note that a fixture 5 for fixing the LED substrate 2 and the lens substrate 3 to the holding member 4 will be described later.

  In the holding member 4, a power supply unit (not shown) is attached to the bottom 414 of the base frame body 41, and a cable group extending from the power supply unit to each LED board is accommodated in the beam frame 42. .

<3. About installation and removal>
Next, a method for attaching and removing the LED substrate 2 and the lens substrate 3 to the fixture 5 and the holding member 4 will be described.

  The fixing tool 5 includes a fixing hole 4 a formed in the holding member 4 (the bent portion 4111 of the side wall 411 or the bottom 421 of the beam frame 42), a fixing hole 2 b formed in the LED substrate 2, and the lens substrate 3. It is inserted into the formed fixing hole 3b to fix them together integrally.

  A specific configuration of the fixture 5 is attachable and detachable by two operations. As shown in FIG. 13, as shown in FIG. 13, a locking portion 51 having a substantially cylindrical shape in which a plurality of locking claws 511 are radially formed. A flange portion 52 provided at the base end of the locking portion 51, and an insertion portion 53 that is inserted into the locking portion 51 and pushes the locking claw 511 outward in the radial direction. is there.

  In a state where the insertion portion 53 is not inserted into the locking portion 51 (sampling position), the locking claw 511 is narrowed without spreading outward in the radial direction, and the locking claw 511 is narrowed in the fixing hole 4a. Do not lock to the opening edge. On the other hand, in a state where the insertion portion 53 is inserted into the locking portion 51 (insertion position), the locking claw spreads outward in the radial direction and is locked to the opening edge of the fixing hole 4a. The LED substrate 2 and the lens substrate 3 are fixed to the holding member 4 by the flange portion 52.

  That is, when the LED substrate 2 and the lens substrate 3 are fixed to the holding member 4, first, the fixing hole 4 a of the holding member 4, the fixing hole 2 b of the LED substrate 2, and the fixing hole 3 b of the lens substrate 3 are communicated. After being put (overlapped), the locking portion 51 is inserted into the fixing holes 2b, 3b, 4a. Thereafter, when the insertion portion 53 is pushed into the locking portion 51, the locking claw 511 spreads and is locked to the opening edge of the fixing hole 4a on the opposite insertion side, and is held by the locking claw 511 and the flange portion 52. The member 4, the LED substrate 2 and the lens substrate 3 are fixed integrally. As described above, the LED is applied to the holding member 4 by two steps of the insertion step of inserting the fixing tool 5 into the fixing holes 2b, 3b, and 4a and the pressing step of pushing the insertion portion 53 and expanding the locking claw 511 after the insertion step. The substrate 2 and the lens substrate 3 can be fixed.

  Next, how the LED substrate 2 and the lens substrate 3 are attached will be described.

  As described above, the LED board 2 has three fixing holes 2b on both sides (left and right) in the longitudinal direction. The lens substrate 3 has one fixing hole 3b on each side (left and right) in the lateral direction.

  The fixing holes 3b of the lens substrate 3 correspond to a pair of right and left fixing holes 2b among the three fixing holes 2b on the left and right sides formed on the LED substrate 2. That is, as shown in FIG. 10, three lens substrates 3 are fixed to one LED substrate 2. Since the lens substrate 3 has a size obtained by dividing the LED substrate 2 into three equal parts, the LED substrate 2 and the lens substrate 3 are in a state where the fixing hole 2b of the LED substrate 2 and the fixing hole 3b of the lens substrate 3 are communicated with each other. It has substantially the same shape in plan view. The number of fixing holes 2b provided on the LED substrate 2 is not limited to three on the left and right, and can be set as appropriate. Correspondingly, the number of fixing holes 3b provided in the lens substrate 3 is also set.

  As described above, the plant growing device 100 according to the present embodiment is configured such that the LED substrate 2 and the lens substrate 3 can be simultaneously fixed by the fixture 5 and only the lens substrate 3 can be separately detached. In other words, the fixture 5 that removably fixes the LED substrate 2 to the holding member 4 and the fixture 5 that removably fixes the lens substrate 3 to the holding member 4 are shared. That is, the LED substrate 2 and the lens substrate 3 are fixed to the holding member 4 together by the fixture 5 and simultaneously fixed, and a plurality of fixtures 5 for fixing one LED substrate 2 fix different lens substrates 3. Like to do.

  Specifically, as shown in FIG. 11, two of the six fixtures 5 that fix the LED substrate 2 to the holding member 4 each fix a different lens substrate 3. Since it is configured in this manner, as shown in FIG. 12, it is possible to remove only a part of the lens substrate 3 without having to remove the LED substrate 2, and the lens substrate 3 has become dirty due to contact with a plant or the like. In some cases, the maintenance work can be extremely simplified. Further, when only the lens substrate 3 is replaced, it is conceivable that the light source unit 103 is attached to the shelf 102. However, the fixture 5 can be attached or detached by two operations. It is extremely easy to take into account. In FIG. 12, the fixture 5 is not shown.

<4. Positioning mechanism 6>
Therefore, the plant growing apparatus 100 according to the present embodiment particularly positions the LED substrate 2 and the lens substrate 3 when the LED substrate 2 and the lens substrate 3 are fixed to the holding member 4, as shown in FIG. Is provided.

  The positioning mechanism 6 positions the relative position along the surface direction of the LED substrate 2 and the lens substrate 3 and the relative distance between the LED substrate 2 and the lens substrate 3 when the LED substrate 2 and the lens substrate 3 are fixed. The concave portion 61 provided on one side of the LED substrate 2 or the lens substrate 3 and the convex portion 62 provided on the other side. In the present embodiment, the LED substrate 2 is provided with a concave portion 61, and the lens substrate 3 is provided with a convex portion 62.

  And the convex part 62 provided in the lens board | substrate 3 is formed in the light-incidence surface (back surface) of the lens board | substrate 3, and the large diameter part 621 whose cross-sectional area is larger than the recessed part 61 of the LED board 2, and the said large diameter part 621. And a small-diameter portion 622 that fits into the convex portion 62. The large-diameter portion 621 defines the distance between the LED substrate 2 and the lens substrate 3, and the height thereof is configured such that the upper surface of the LED 21 is substantially in contact with the light incident surface (back surface) of the lens substrate 3. ing.

  Thereby, when attaching the lens substrate 3 to the LED substrate 2, the lens substrate 3 is positioned with respect to the LED substrate 2 so that the fixing hole 2b of the LED substrate 2 and the fixing hole 3b of the lens substrate 3 communicate with each other. Thus, the fixing work to the holding member 4 is facilitated.

<5. About cooling circulation mechanism 7>
Furthermore, the plant growing apparatus 100 of the present embodiment includes a cooling circulation mechanism 7 for cooling the package LED 21 and circulating air between plants.

  As shown in FIG. 14, the cooling circulation mechanism 7 includes a plurality of first through holes 2 a penetrating the LED mounting surface and the back surface of the LED substrate 2, and a plurality of light incident surfaces and light exit surfaces of the lens substrate 3. A second through-hole 3a and a suction / blow-out mechanism (not shown) that sucks air from a space formed on the back side of the LED substrate 2, cools it, and blows it into the plant growing room R are provided.

  The opening area of the first through hole 2a is smaller than the opening area of the second through hole 3a. In the present embodiment, the first through hole 2a and the second through hole 3a are both circular, and the opening diameter of the first through hole 2a is set smaller than the opening diameter of the second through hole 3a. .

  Further, in one light source unit 103, the first through holes 2a are formed more than the second through holes 3a. Further, the formation density of the first through holes 2a in the LED substrate 2 is made substantially uniform over the entire area of the LED substrate 2, and the number of first through holes 2a corresponding to each second through hole 3a is substantially the same. It is trying to become.

  The space formed on the back surface side of the LED substrate 2 is the internal space S1 of the base frame body 41 in the present embodiment, and air holes 41H are formed at predetermined positions of the base frame body 41. The air hole 41 </ b> H communicates with a suction port (not shown) provided in the shelf portion 102 or the shelf column 101 in a state of being attached to the shelf portion 102.

  The suction / blow mechanism includes a circulation path that communicates with the suction port, a circulation pump that is provided on the circulation path and circulates air in the circulation path, and a cooling unit that is provided on the circulation path and cools the air. It is equipped with. The cooling unit may be one that naturally cools, or one that is forced to cool to a constant temperature.

  In such a configuration, when the light source unit 103 is attached to the shelf 102, the air hole 41H of the base frame body 41 communicates with the suction port. When air is sucked by the circulation pump, air is sucked from the air hole 41H from the space S1 on the back surface side of the LED substrate 2, flows through the circulation path, is cooled by the cooling unit, and is blown out again into the plant growing chamber 200.

  Further, when air is sucked from the space S1 inside the base frame body 41, air in front of the lens substrate 3 (that is, in the plant growing room R) is sucked from the second through hole 3a, and the LED mounting surface of the LED substrate 2 is drawn. After flowing along and cooling the LED 21, the LED 21 passes through the first through hole 2 a and is sucked into the base frame body 41 on the LED back surface side. At this time, the opening diameter of the first through hole 2a is set smaller than the opening diameter of the second through hole 3a, and the number of the first through holes 2a is larger than the number of the second through holes 3a. Since the air sucked from the second through-hole 3a branches and flows into a plurality of flow paths on the LED mounting surface, the LED 21 can be cooled uniformly. Further, the formation density of the first through holes 2a in the LED substrate 2 is made substantially uniform over the entire area of the LED substrate 2, and the number of the first through holes 2a corresponding to each second through hole 3a is made substantially the same. Cool evenly.

<6. Effects of this embodiment>
According to the plant growing apparatus 100 according to the present embodiment configured as described above, the red light emitting element 21R, the green light emitting element 21G, and the blue light emitting element 21B are sealed in one package LED 21, and the light source and the plant are connected. Regardless of the distance, the light emitted from each light emitting element can be sufficiently mixed. In addition, since color mixing can be performed without using a diffusion plate, loss of light from each light emitting element can be reduced. Furthermore, by using a plurality of such package LEDs 21, it is possible to irradiate a plant with mixed light with high density. In addition, since the ratio of the intensities of the respective wavelengths is about 4: 1: 1, the plant can be irradiated with light suitable for plant growth.

<7. Other Modified Embodiments>
The present invention is not limited to the above embodiment.

  For example, the package LED 21 of the above embodiment uses the red light emitting element 21R, the green light emitting element 21G, and the blue light emitting element 21B, but in addition, the red light emitting element 21R and the blue light emitting element 21G that contribute to plant photosynthesis. May be sealed. In this case, as shown in FIG. 14, the ratio of the number of the red light emitting elements 21R and the number of the blue light emitting elements 21B is set to 6: 1. By setting the light intensity ratio to about 6: 1, light suitable for plant growth can be irradiated. At this time, in the LED substrate 2 using the package LED 21, the circuit configuration of the blue light emitting element 21 </ b> B is the same as that in FIG. 7, but the circuit configuration of the red light emitting element 21 </ b> R is 3M rows in parallel of 2N columns of LED columns connected in series. It is configured by connecting. This is because, when a circuit of 2M rows and 3N columns is configured, the number of series increases and the voltage changes.

  Even in the above case, it is conceivable to use a green light emitting element. By using a green light emitting element, plants do not contribute to photosynthesis, but plants can be made colorful. Therefore, it is possible to grow a colorful plant that responds to the needs of consumers and stimulates purchase intention.

  Further, the configuration of the fixing device is not limited to the above-described embodiment, and in addition to what is fixed through the fixing hole, the holding member, the LED substrate, and the lens substrate are sandwiched between the end portions without providing the fixing hole. You may use the clip-type fixing tool fixed by this.

  Furthermore, the shape of the first through hole and the second through hole is not limited to a circular shape, and may be another long hole shape, an elliptical shape, or a polygonal shape.

  In addition, in the above-described embodiment, from the viewpoint of component commonality, the size of the lens substrate is made equal to the size of the LED substrate. .

  In addition, some or all of the above-described embodiments and modified embodiments may be combined as appropriate, and the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. .

The schematic block diagram of the plant growing apparatus of this embodiment. The top view of a light source unit. The AA sectional view taken on the line of a light source unit. The top view of a LED board. The schematic block diagram of package LED. The circuit block diagram of package LED. The circuit block diagram of the green light emitting element or blue light emitting element of a LED board. The circuit block diagram of the red light emitting element of a LED board. The top view of a lens board | substrate. The figure which shows typically the size of a LED board and a lens board | substrate. The disassembled perspective view of an LED board, a lens board | substrate, and a holding member. The perspective view which shows the state which removed only one lens board | substrate. The partial expanded sectional view of an LED board, a lens board | substrate, and a holding member. The partial expanded sectional view which shows a cooling circulation mechanism. The block diagram of package LED which concerns on deformation | transformation embodiment.

DESCRIPTION OF SYMBOLS 100 ... Plant growing apparatus 103 ... Light source unit 2 ... LED board 21 ... Package LED
21R ... Red light emitting element 21G ... Green light emitting element 21B ... Blue light emitting element 3 ... Lens substrate 31 ... Lens portion 4 ... Holding member

Claims (2)

A plurality of plant-growing package LEDs;
An LED substrate for supporting the package LED;
A lens substrate provided in front of the LED mounting surface of the LED substrate and having a lens portion formed for each package LED;
A holding member for holding the LED substrate and the lens substrate;
In the package LED, a red light emitting element, a green light emitting element, and a blue light emitting element are sealed in one package. The number of red light emitting elements, the number of green light emitting elements, and the blue light emitting sealed in the package. By the ratio of the number of elements being 4: 1: 1, the ratio of the intensity of red light, the intensity of green light and the intensity of blue light is approximately 4: 1: 1.
When the number of green light emitting elements connected in series in the package and the number of green light emitting elements connected in series is n, 2n red light emitting elements sealed in the package are connected in series. And
In the circuit configuration of the green light emitting element and the blue light emitting element, LED rows connected in series by the number of package LEDs provided along the longitudinal direction of the LED substrate are provided along the short direction of the LED substrate. Configured by connecting in parallel the number of packaged LEDs,
The circuit configuration of the red light emitting device is a package in which LED rows connected in series by twice the number of package LEDs provided along the longitudinal direction of the LED substrate are provided along the short direction of the LED substrate. A plant-growing light source unit configured by connecting in parallel twice the number of LEDs . A plant growing device using a plant growing package LED provided on an LED substrate ,
In the package LED, a red light emitting element, a green light emitting element, and a blue light emitting element are sealed in one package. The number of red light emitting elements, the number of green light emitting elements, and the blue light emitting sealed in the package. By the ratio of the number of elements being 4: 1: 1, the ratio of the intensity of red light, the intensity of green light and the intensity of blue light is approximately 4: 1: 1.
When the number of green light emitting elements connected in series in the package and the number of green light emitting elements connected in series is n, 2n red light emitting elements sealed in the package are connected in series. And
In the circuit configuration of the green light emitting element and the blue light emitting element, LED rows connected in series by the number of package LEDs provided along the longitudinal direction of the LED substrate are provided along the short direction of the LED substrate. Configured by connecting in parallel the number of packaged LEDs,
The circuit configuration of the red light emitting device is a package in which LED rows connected in series by twice the number of package LEDs provided along the longitudinal direction of the LED substrate are provided along the short direction of the LED substrate. A plant growing device characterized by being configured by connecting in parallel twice the number of LEDs.