JP2009011232A - Lighting equipment for plant cultivation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting equipment for plant cultivation, capable of evenly lighting beam from the lighting equipment, improving growth yield of cultivated objects, removing oxygen generated from cultivated objects, evenly supplying carbon dioxide, promoting photosynthesis, efficiently using beam of artificial lighting, minimally suppressing an electricity rate for lighting, and holding a temperature around cultivated objects constant. <P>SOLUTION: This lighting equipment includes an illuminating lamp 5 set under a top plate 4, and a side plate 6 of a required depth for surrounding the periphery of the illuminating lamp 5. The top plate 4 is provided with a radiating part 7 which introduces air heated with the illuminating lamp 5 to the outside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting device for plant cultivation, and in particular, plant cultivation that supplies carbon dioxide from the surroundings while removing oxygen generated from the cultivation, promotes photosynthesis and keeps the temperature around the cultivation constant. It is related with the illuminating device.

In recent years, hydroponic cultivation in which plants are grown without using natural soil has been performed in plant factories.
Hydroponics has the advantage that it is possible to control soil pests that occur in hydroponics, avoid continuous cropping problems, and omit plowing and weeding operations.
In hydroponics, the management of the above-ground part and the management of the underground part are important. For example, the above-ground part manages light, temperature, humidity, and air flow. Management of oxygen concentration, electrical conductivity, and culture solution temperature is performed.

Usually, in vegetable cultivation such as soil cultivation, uneven illumination and fertilization unevenness do not occur by burning petroleum or the like to supply carbon dioxide and using natural light. On the other hand, in a plant cultivation environment that is completely shielded from light and does not enter the open air, it is illuminated with fluorescent lamps, etc. Irradiance unevenness occurs, and the growth of the cultivated product becomes unstable, or partial growth failure tends to occur.
In addition, power charges are not a problem in soil cultivation such as a greenhouse that normally uses natural light. In contrast, in a multi-stage fully artificial light type plant cultivation environment that relies solely on artificial lighting in a closed cultivation room, lighting costs will increase the cost of cultivated vegetables unless artificial light is used efficiently It will be.

Thus, in the conventional plant factory, there is uneven fertilization of carbon dioxide and uneven lighting, causing variations in the growth of the cultivation, carbon dioxide also grows the cultivation, and when the plant length reaches the vicinity of the lighting device, There was a problem that the growth efficiency deteriorated because the flow of air in the cultivation room was blocked.
More specifically, in a plant factory using an illumination device as shown in FIG. 7A in which a top plate and a part of a side surface are covered with a reflector, (1) the temperature and carbon dioxide concentration in the cultivation room In order to keep it constant, the reflector on the side is not completely covered and a certain gap is left, so the light rays of the light leak to the outside, the growth of the cultivation outside the cultivation room is delayed, and uneven growth occurs (2) When the plant height is increased, there are problems such as poor air intake.
Moreover, in a plant factory using a lighting device that is completely shielded and covered with a reflector as shown in FIG. 7 (b), (1) because the sealed cultivation room is completely shielded from light, the light of illumination is exposed to the outside. The irradiance is attenuated each time due to diffuse reflection, and the outside cultivation is slow to grow due to uneven illumination. (2) In the cultivation room completely shielded from light, the purpose of mass production is In the case of cultivation facilities, it was difficult to air-condition without causing temperature unevenness, and there were problems such as being limited to small devices.

  In view of the problems of the above-described conventional plant cultivation lighting device, the present invention enables the light to be uniformly illuminated from the lighting device for the cultivation, and improves the growth yield of the cultivation, Removes oxygen generated from cultivated products, supplies carbon dioxide evenly, promotes photosynthesis, efficiently uses the light of artificial lighting, minimizes the electricity bill for lighting, and cultivated products An object of the present invention is to provide a lighting device for plant cultivation in which the ambient temperature is kept constant.

  In order to achieve the above-mentioned object, the plant cultivation lighting device according to the first aspect of the present invention is provided with an illuminating lamp under the top plate, and includes a side plate having a required depth surrounding the periphery of the illuminating lamp, It is characterized in that a heat radiating portion for leading the air heated by the illuminating lamp to the outside is provided.

  In this case, the lighting device can be suspended so that the height can be adjusted.

  In order to achieve the same object, the lighting device for plant cultivation according to the second aspect of the present invention is arranged at the focal point of the parabolic surface of the reflecting plate having a substantially U-shaped cross section with the approximate parabola as a cross section. An illuminating lamp is provided, and a heat dissipating section for leading the air heated by the illuminating lamp to the outside is provided on the upper part of the reflecting plate.

  In this case, the reflecting plate can be provided so as to be rotatable about the illumination lamp.

  According to the plant cultivation lighting device of the first aspect of the present invention, an illuminating lamp is provided under the top plate, and a side plate having a required depth surrounding the illuminating lamp is provided, and the top plate is heated by the illuminating lamp. Since the heat radiation part that leads out the air to the outside is provided, the air containing carbon dioxide is supplied from the surroundings while removing oxygen generated from the cultivation using the convection due to the escape of air from the heat radiation part, and photosynthesis Can be promoted and the temperature around the cultivation can be kept constant.

  In this case, by hanging the lighting device so that the height can be adjusted, the height of the lighting device can be arbitrarily adjusted according to the growth of the cultivated product, and the distance between the cultivated product and the lighting device can be kept constant.

  Moreover, according to the lighting device for plant cultivation of the second invention, the reflector having a substantially U-shaped cross section with the approximate parabola as a cross section, and the illuminating lamp arranged at the focal point of the paraboloid of the reflector are provided. In addition, since a heat dissipating part for leading the air heated by the illuminating lamp to the outside is provided on the upper part of the reflector, the oxygen generated from the cultivated matter is removed using the convection due to the escape of air from the heat dissipating part. By supplying air containing carbon dioxide from the surroundings, photosynthesis can be promoted and the temperature around the cultivation can be kept constant.

In this case, it is possible to change the direction of the reflector by providing the reflector so that it can rotate around the illuminating lamp, thereby concentrating the reflected light at a specific location to increase the illuminance, or to reflect the reflected light to the ceiling. It is possible to diverge to the surface to make indirect light.
As a result, in addition to being able to cope with cultivated crops with high light saturation points to low cultivated crops, the ability to arbitrarily adjust the illuminance distribution on the cultivated surface is the ability to cultivate cultivated crops with different light saturated points Is possible.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a plant cultivation lighting device of the present invention will be described with reference to the drawings.

  1 to 2 show a first embodiment of a lighting device for plant cultivation according to the present invention.

  First, as a whole cultivation apparatus, the water tank 2 which floats the planting panel 1 (refer FIG. 3) is installed in the top-and-bottom multistage, and the lighting apparatus A of the plant cultivation of a present Example above each planting panel 1 is installed. Is installed.

  The plant-cultivating lighting device A is provided with an illuminating lamp 5 under the top board 4 and a side plate 6 having a required depth surrounding the illuminating lamp 5. A heat radiating section 7 is provided for leading the air heated by the outside to the outside.

The illuminating lamp 5 is composed of a plurality of parallel fluorescent lamp straight tubes, and is attached to the top plate 4 via a socket 51.
In addition, the illuminating lamp 5 is provided with a dimming function by performing high-frequency lighting by an inverter 52 in order to cope with a cultivated product that prefers strong light to a cultivated product that favors weak light.
Further, in order to optimize the photosynthesis, respiration, and commutation of the cultivated product, a light period (lamp ON) and a dark period (lamp OFF) are provided and controlled by a timer.

The inside of the top plate 4 and the side plate 6 enhances the illumination efficiency of the illumination target surface as a reflection plate by white or mirror surface treatment.
The top plate 4 and the side plate 6 have a box shape with an opening at the bottom, but have a thickness of 0.5 in order to ensure workability and safety at the time of mounting the gantry and to reduce the number of parts when manufacturing the lighting device. It is composed of a thin sheet metal bending structure of about 0.8 mm.

On the other hand, the heat dissipating section 7 shown in FIG. 1 is provided with through holes (not shown) such as slits on the top plate 4 having a single structure substantially evenly, and the internal air heated by the illumination lamp 5 has its specific gravity. It will naturally flow out to the outside due to its small size.
Further, as shown in FIG. 2, by forming the top plate 4 into a hollow double structure, a thin cylindrical passage 71 formed in the longitudinal direction of the fluorescent lamp and a reflector serving as a double structure lower plate The communication air (illustration omitted) provided in 41 and the inside air heated by the illuminating lamp 5 can also flow out naturally naturally by the small specific gravity.
In this way, by utilizing the convection due to the escape of air from the heat radiating section 7, by supplying carbon dioxide from the surroundings while removing oxygen generated from the cultivation, the photosynthesis is promoted and the temperature around the cultivation is increased. Keep constant.

Moreover, the illuminating device A is suspended from the gantry 3 by a hanging strap 42 such as a chain so that the height can be adjusted, thereby arbitrarily adjusting the height of the illuminating device A according to the growth of the cultivation, The distance between the cultivated product and the lighting device A can be kept constant.
The height adjusting mechanism attaches a hanging strap 42 to a horizontal rod 43 that is rotatably supported on the gantry 3, and rotates the horizontal rod 43 with a handle 44 to wind or unwind the hanging strap 42. To do.

  Thus, the plant cultivation lighting device A of the first embodiment is provided with the illumination lamp 5 under the top board 4 and the side board 6 having a required depth surrounding the circumference of the illumination lamp 5. In addition, since the heat dissipating part 7 for deriving the air heated by the illuminating lamp 5 to the outside is provided, the convection caused by the escape of air from the heat dissipating part 7 is used to remove oxygen generated from the cultivated product from the surroundings. Air containing carbon dioxide can be supplied to promote photosynthesis and keep the temperature around the cultivation constant.

  In this case, by suspending the lighting device A so that the height can be adjusted, the height of the lighting device A is arbitrarily adjusted according to the growth of the cultivated product, and the distance between the cultivated product and the lighting device A can be kept constant. it can.

The 2nd Example of the illuminating device for plant cultivation of this invention is shown in FIGS.
This plant cultivation lighting device B includes a reflector 8 having a substantially U-shaped cross section with an approximate parabola as a cross section, and an illuminating lamp 5 arranged at the focal point of the paraboloid of the reflector 8. Is provided with a heat dissipating section 9 for leading the air heated by the illumination lamp 5 to the outside.

  Here, the operation of the reflecting plate 8 having a substantially U-shaped cross section with the approximate parabola as a cross section will be described with reference to the explanatory diagram showing the reflection path of the light beam of the illumination in FIG. 5. In the case of a reflector, the light rays from the illumination leak to the outside, and about 50% of the illumination light becomes ineffective, and the growth of the cultivation outside the cultivation room is delayed, resulting in uneven growth. When a substantially U-shaped reflecting plate having a cross section of the approximate parabola in (b) and a flat reflecting plate are combined, illumination light does not leak to the outside, and almost 100% of the illumination light is effective. At the same time, it is possible to uniformly illuminate the light beam, and it is possible to uniformly grow the cultivated product including the cultivated product outside the cultivation room, thereby improving the yield of the cultivated product.

The illuminating lamp 5 is composed of a fluorescent lamp straight tube, and a reflecting plate 8 is rotatably fitted around the illuminating lamp 5.
Moreover, the illuminating lamp 5 performs high-frequency lighting and is provided with a dimming function in order to cope with cultivated products that prefer strong light to cultivated products that prefer weak light.
Further, in order to optimize the photosynthesis, respiration, and commutation of the cultivated product, a light period (lamp ON) and a dark period (lamp OFF) are provided and controlled by a timer.

The reflector 8 is made of a lightweight and highly reflective material using a thin sheet of styrene paper or a colored iron plate, and has, for example, a C-shaped notch so that the reflector 8 can be directly pivotally fitted to a fluorescent lamp. The portion 81 can be provided integrally or by adhesion.
Thereby, while attaching the reflecting plate 8 easily, the reflecting plate 8 can be easily rotated around the illumination lamp 5.
Moreover, as shown in FIG.3 (b), the reflecting plate 8 can combine with the illuminating device A of 1st Example, and can raise the illumination efficiency with respect to a cultivation. In this case, the secondary reflected light reflected by the planting panel 1 is rereflected by the paraboloid of the reflector 8 of the present embodiment and the top plate 4 and the side plate 6 of the lighting device A of the first embodiment. Optimize lighting efficiency.
Furthermore, the illuminance of the reflector 8 can be adjusted by adjusting the depth of the paraboloid or by adjusting the length of the hanging strap 42 of the lighting device A of the first embodiment.

The heat dissipating part 9 is formed in a slit shape on the upper part of the reflecting plate 8, and the internal air heated by the illuminating lamp 5 naturally flows out to the outside due to its small specific gravity.
In this way, by utilizing the convection due to the escape of air from the heat radiating unit 9 and supplying carbon dioxide from the surroundings while removing oxygen generated from the cultivation, photosynthesis is promoted and the temperature around the cultivation is increased. Keep constant.

  Thus, the plant cultivation lighting device B of the second embodiment has a substantially U-shaped reflecting plate 8 whose section is an approximate parabola and the illuminating lamp 5 arranged at the focal point of the parabolic surface of the reflecting plate 8. Since the heat radiation part 9 which leads the air heated by the illuminating lamp 5 to the outside is provided on the upper part of the reflector 8, the convection due to the air coming out from the heat radiation part 9 is used, While removing the generated oxygen, air containing carbon dioxide is supplied from the surroundings to promote photosynthesis and keep the temperature around the cultivation constant.

In this case, the direction of the reflecting plate 8 can be changed by providing the reflecting plate 8 so as to be rotatable around the illuminating lamp 5, thereby concentrating the reflected light at a specific location to increase the illuminance or It becomes possible to diverge the light to the ceiling surface to make indirect light.
As a result, in addition to being able to handle the same lighting device B from a crop with a high light saturation point to a crop with a low light saturation point, the function that can arbitrarily adjust the illuminance distribution on the cultivation surface is Cultivation is possible.

In FIG. 6, the conceptual diagram of the plant factory using the illuminating device of plant cultivation of this invention is shown.
This plant factory is an application of the plant cultivation lighting device described in each of the above embodiments, and has the following characteristics.
(1) By using the reflecting plate 8 having a substantially U-shaped cross section with the approximate parabola as a cross section, it is possible to ensure a space for directing illumination light to the cultivated product and taking in cold air from the outside.
(2) Light leaking outside the cultivation room can be greatly reduced.
(3) The hot air heated by the illuminating lamp passes through the space between the reflecting plates 8 having a substantially U-shaped cross section with the approximate parabola as a cross section, and moves outside the cultivation room by convection. Cold air is taken in.
(4) The reflecting plate 8 of the outer illuminating lamp 5 is provided with an extension 82 at one end (outer side) or by changing the direction of reflection by slightly turning the reflecting plate 8 inward. Leakage can be prevented.

  The lighting device for plant cultivation according to the present invention has been described above based on the embodiments thereof. However, the present invention is not limited to the configurations described in the above embodiments, and the configuration is appropriately set within the scope not departing from the gist thereof. Can be changed.

  The plant cultivation lighting device of the present invention has the characteristics of supplying carbon dioxide from the surroundings while removing oxygen generated from the cultivation, promoting photosynthesis and keeping the temperature around the cultivation constant. Therefore, it can be suitably used for the purpose of factory cultivation of vegetables and other plants.

It is sectional drawing which shows 1st Example of the illuminating device for plant cultivation of this invention. It is a 3rd page figure which shows the other example of the illuminating device of plant cultivation of the Example. The 2nd Example of the illuminating device for plant cultivation of this invention is shown, (a) is the perspective view, (b) is sectional drawing which shows an example of a use condition. The plant cultivation lighting device of the same Example is shown, (a) is sectional drawing of the reflecting plate without an attaching part, (b) is the same front view, (c) is sectional drawing of the reflecting plate which adhere | attached the attaching part, ( d) is a front view of the same, (e) is a cross-sectional view of a reflector plate provided with an attachment portion integrally, and (f) is a front view of the same. It is explanatory drawing which shows the reflection path | route of the light ray of illumination, (a) is the case of a flat reflector, (b) is a substantially U-shaped cross-section with a cross section of an approximate parabola, and a flat reflector. Each case is shown in combination. It is a conceptual diagram which shows the plant factory using the illuminating device of plant cultivation of this invention. It is a conceptual diagram of a plant factory using a conventional plant cultivation lighting device, (a) is a plant factory using a lighting device with a top plate and part of the side covered with a reflector, and (b) is completely light-shielded. Each plant factory using a lighting device covered with a reflector is shown.

Explanation of symbols

A lighting device B lighting device 1 planting panel 2 water tank 3 mount 4 top plate 41 reflecting plate 42 hanging strap 43 horizontal rod 44 handle 5 lighting lamp 51 socket 52 inverter 6 side plate 7 heat radiating portion 71 passage 8 reflecting plate 81 mounting portion 9 heat dissipation Part

Claims (4)

  An illuminating lamp is provided under the top plate, a side plate having a required depth surrounding the illuminating lamp is provided, and a heat radiating portion for leading the air heated by the illuminating lamp to the outside is provided on the top plate. A lighting device for plant cultivation.   2. The plant cultivation lighting device according to claim 1, wherein the lighting device is suspended so as to be adjustable in height.   A reflector having a substantially U-shaped cross section with an approximate parabola as a cross section, and an illuminating lamp arranged at the focal point of the parabolic surface of the reflector, and air heated by the illuminating lamp is externally provided on the reflector. An illuminating device for plant cultivation, characterized in that a heat radiating section led out to the radiant section is provided.   4. The plant cultivation lighting device according to claim 3, wherein the reflecting plate is provided so as to be rotatable about an illumination lamp.

Images