JP2020000030A - Blower for plant cultivation shelf, plant cultivation device - Google Patents

Abstract

To provide a blower for a plant cultivation shelf, which can send a proper wind uniformly to all the plants on the shelf and can grow the plants uniformly.SOLUTION: An air supply device 4, a pressure adjustment chamber 5, and air blow tubes 6, 6, - - - are provided. The air supply device 4 is for sucking room air in which the carbon dioxide concentration is adjusted and supplying the air to the pressure adjustment chamber 5. The pressure adjustment chamber 5 is provided in the vertical direction on the side of the plant cultivation shelf 2 and its internal pressure is kept constant. An air outlet 7 is provided for each shelf stage of the plant cultivation shelf 2, and each one end portion of the air blow tubes 6, 6, - - - is connected to the air outlet 7 of the pressure adjustment chamber 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a blower and a plant cultivation device for a plant cultivation shelf.

BACKGROUND ART Conventionally, plant cultivation shelves are installed in factories, and plants such as leafy vegetables are cultivated using artificial light sources. The inside of the plant cultivation shelf is filled with moisture and heat due to the transpiration of the plant, and it is necessary to send a moderate wind to the plants on the shelf in order to spread the accumulated moisture and heat and keep the inside of the shelf at a uniform temperature There is.
The one described in Patent Literature 1 includes an air supply unit 23 on one side in the width direction of the shelf and an exhaust unit 24 on the other side, and a rectangular air supply hole 23c of the air supply unit 23 to a cultivation space of the shelf. The air is discharged, and the exhaust unit 24 sucks the air in the cultivation space and exhausts the air outside the shelf. In this cultivation apparatus, the wind is strong near the air supply hole 23c, and the wind is weak near the center in the width direction of the shelf, which causes a variation in plant growth.

JP 2016-140249 A

  The present invention has been made in view of the above-described circumstances, and aims to provide a blower and a plant cultivation device for a plant cultivation shelf capable of uniformly sending appropriate wind to all the plants on the shelf and performing uniform growth. .

  In order to achieve the above object, a blower for a plant cultivation shelf according to the first aspect of the present invention includes an air supply device, a pressure adjustment chamber, and a blower tube, and the air supply device adjusts a carbon dioxide concentration. The room is sucked and supplied to the pressure adjustment chamber, the pressure adjustment chamber is provided in the vertical direction on the side of the plant cultivation shelf, the internal pressure is kept constant, plant An air outlet is provided for each stage of the cultivation shelf, and one end of the blower tube is connected to the air outlet of the pressure adjustment chamber. Here, the "side of the plant cultivation shelf" includes the front and rear sides of the plant cultivation shelf in addition to the right and left sides as viewed from the front of the plant cultivation shelf. In addition, the pressure adjustment chamber ranges from at least the height position of the air duct of the lowermost shelf to the height position of the air duct of the uppermost shelf according to the height of the plant cultivation shelf. , May be provided in the vertical direction.

  The plant cultivation apparatus according to the invention according to claim 2 includes a plant cultivation shelf and a blower, the blower has an air supply device, a pressure adjustment chamber, and a blower pipe, and the air supply device has A chamber in which the carbon concentration is adjusted is suctioned and supplied to the pressure adjustment chamber, and the pressure adjustment chamber is provided vertically on the side of the plant cultivation shelf so that the internal pressure is kept constant. An air outlet is provided for each stage of the plant cultivation shelf, and one end of the blower tube is connected to the air outlet of the pressure adjustment chamber. Here, the "side of the plant cultivation shelf" includes the front and rear sides of the plant cultivation shelf in addition to the right and left sides as viewed from the front of the plant cultivation shelf. In addition, the pressure adjustment chamber ranges from at least the height position of the air duct of the lowermost shelf to the height position of the air duct of the uppermost shelf according to the height of the plant cultivation shelf. , May be provided in the vertical direction.

  The blower for plant cultivation shelves according to the first aspect of the present invention is arranged such that the pressure adjustment chambers are provided in the vertical direction on the side of the plant cultivation shelves, so that the blast pipe for each stage of the plant cultivation shelves can be adjusted to the pressure adjustment chamber. No pressure loss occurs, and air is sent to the plants through the air duct, so that the wind does not attenuate as you move away from the pressure adjustment chamber. A suitable wind can be sent uniformly to the plants to achieve uniform growth. Furthermore, the blower of the present invention can send air having an appropriate carbon dioxide concentration to the plant by the air supply device sucking the room air having the adjusted carbon dioxide concentration and supplying the air to the pressure adjusting chamber, The photosynthesis becomes active and the growth is improved, and the adjustment of the carbon dioxide concentration is performed in the entire room, so that the adjustment is easy.

  The plant cultivation apparatus according to the invention according to claim 2 includes a plant cultivation shelf and a blower, and the blower has a pressure adjustment chamber provided in a vertical direction on a side of the plant cultivation shelf. Since the air pipes of each stage can be directly connected to the pressure control chamber, there is no pressure loss.In addition, by sending air toward the plants through the air pipes, the wind attenuates as the distance from the pressure control chamber increases. Since there is no such thing, it is possible to send an appropriate wind uniformly to all the plants on the shelf and to perform uniform growth. The air blower can send air with an appropriate concentration of carbon dioxide to the plants by the air supply device sucking the room air with the adjusted carbon dioxide concentration and supplying it to the pressure adjustment chamber, and the photosynthesis of the plant is activated In addition, the growth is improved, and the carbon dioxide concentration is adjusted in the whole room, so that the adjustment is easy.

It is a front view showing one embodiment of a plant cultivation device. It is a top view of the plant cultivation apparatus. It is AA sectional drawing of FIG. It is a longitudinal cross-sectional view which expands and shows the periphery of an air duct. (A) is a plan view of a blower (before connecting a blower tube), (b) is a side view of a plant cultivation shelf side of the blower, and (c) is a front view of the blower. It is a longitudinal section of a plant factory in which a plant cultivation device was installed. It is a table | surface which shows the result of having measured the wind speed in each part of a plant cultivation shelf. It is a graph which shows the dispersion | variation of the wind speed measured in each part of a plant cultivation shelf. (A) is a plan view of a conventional plant cultivation shelf as a comparative example, and (b) is a front view of the same plant cultivation shelf. It is a graph and a table which show the result of having measured wind speed with the plant cultivation shelf of the present invention, and a comparative example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 6 shows a plant factory that produces vegetables and the like, and a plurality of plant cultivation apparatuses 1 are installed in a closed room 8 in the factory. An air conditioner 9 is provided in the room 8, and the temperature and humidity in the room 8 are kept constant by the air conditioner 9. Specifically, the temperature is maintained at 22 to 26 ° C. and the humidity is maintained at 60 to 80%.
Further, a carbon dioxide concentration adjusting device 10 is provided in the room 8, and adjusts the carbon dioxide concentration in the room 8 to 3 to 5 times that of the atmosphere. Specifically, since the concentration of carbon dioxide in the atmosphere is about 400 ppm, the concentration is set to 1200 to 2000 ppm (actually, 1500 ppm).

  The plant cultivation apparatus 1 includes a plant cultivation shelf 2 and a blower 3 as shown in FIGS. The plant cultivation shelf 2 has upper and lower shelves 11, 11,... And a top plate 12 supported by columns 13. The plant cultivation shelf 2 has a length in the left-right direction of about 6 m, a depth (length in the front-rear direction) of about 1.3 m, and a height of about 2.5 m. As shown in FIGS. 1 and 3, a tray 14 for plant cultivation is provided on the shelf board 11 of each stage. Lighting 15 is attached to the lower surface of the top plate 12 and the lower surface of the shelf 11 at the first to fourth steps from the top. The plant 16 to be cultivated is not particularly limited, and examples thereof include leafy vegetables such as lettuce.

As shown in FIGS. 1 to 3, the blower device 3 includes an air supply device 4, a pressure adjustment chamber 5, and blower tubes 6, 6. As shown in FIG. 1, the air supply device 4 and the pressure adjusting chamber 5 are installed on a gantry 17 arranged on the right side of the plant cultivation shelf 2.
The air supply device 4 uses a commercially available sirocco fan, and is installed under the gantry 17. The fan rotates by a motor to suck air in the room 8 and send it to the pressure adjustment chamber 5.
As shown in FIGS. 1 and 2, the pressure adjusting chamber 5 is a rectangular parallelepiped box-shaped one, and is disposed on the right side when viewed from the front of the plant cultivation shelf 2, and is provided with a blower tube 6 of a lowermost shelf. From the height position of the uppermost shelf to the height position of the blower tube 6 of the uppermost shelf. The upper surface of the pressure adjustment chamber 5 is substantially the same height as the plant cultivation shelf 2, and the depth dimension is slightly smaller than the plant cultivation shelf 2. As shown in FIG. 5, the pressure adjusting chamber 5 has an exhaust port of the air supply device 4 connected to a hole 18 provided on the bottom surface by a short duct 19, and air is directly supplied from the air supply device 4 through the hole 18. , The internal pressure is kept constant. As shown in FIGS. 1, 2, and 5, the pressure adjusting chamber 5 is provided with air outlets 7, 7,. Three air outlets 7 are provided for each stage of the plant cultivation shelf 2 at intervals in the front-rear direction.

The blower tube 6 is formed of a polyethylene tube, and is provided across the entire length of the plant cultivation shelf 2 in the left-right direction as shown in FIG. It is connected to the outlet 7 and its left end is closed. As shown in FIG. 3, three blower tubes 6 are provided at intervals in the front-rear direction for each stage of the plant cultivation shelf 2. The blower tube 6 is supported by a substantially U-shaped support 20 attached to the lower surfaces of the top plate 12 and the shelf plate 11.
The blower tube 6 is provided with air outlets 21 at regular intervals in the longitudinal direction. As shown in FIG. 4, the air outlet 21 is provided on the lower surface side of the blower tube 6 at a position inclined forward and backward from the vertical direction by a predetermined angle. By blowing the wind 22 obliquely from the blower tube 6 in this manner, moisture and heat trapped on the tray 14 due to the transpiration of the plants can be diffused, and the air can be efficiently replaced by fresh air sent from the blower tube 6. The diameter of the blower tube 6 is 48 mm, and the diameter of the air outlet 21 is 8 mm.
The wind speed of the wind 22 is preferably 0.3 to 0.7 m / sec in the vicinity of the plant 16. This is because it is close to the average wind speed in the natural world and is preferable for plant growth.
Although there are a total of fifteen air ducts, they all have the same length (6 m). As described above, the pressure inside the pressure adjustment chamber 5 is kept constant by constantly feeding air from the air supply device 4, and the air outlets 7, 7,. Are connected to each other, so that the pressure in all the blowers 6 is substantially the same as the pressure in the pressure adjustment chamber 5 regardless of the vertical position. Since the diameter of the air outlet 21 is very small at 8 mm with respect to the diameter (48 mm) of the blower tube 6, there is almost no effect (pressure loss) caused by blowing air from the air outlet 21, Is maintained at a constant level, regardless of whether the distance from the pressure adjustment chamber 5 is short or far, the air 22 is well-balanced from all the air outlets 21 of each blower tube 6, and the strength of the wind 22 is high. Becomes substantially uniform.

  The pressure in the pressure adjustment chamber 5 is adjusted so that the wind speed of the wind 22 that flows from the air outlet 21 of the blower tube 6 is within the above range. That is, when the wind is weak, the output of the air supply device 4 is increased to increase the pressure of the pressure adjustment chamber 5, and when the wind is too strong, the output of the air supply device 4 is decreased to decrease the pressure of the pressure adjustment chamber 5. Decrease pressure.

FIG. 7 shows the results of measuring the wind speed of the wind 22 coming out of the air outlet 21 of the blower tube 6 at various points on the plant cultivation shelf 2. The measurement of the wind speed was performed with respect to the three air blow pipes 6 before and after each stage of the plant cultivation shelf 2, from the right end air outlet 21 near the pressure adjustment chamber 5, the center air outlet 21, and the pressure adjustment chamber 5. As shown in FIG. 4, measurements were taken at two locations, near the air outlet 21 and near the tray 14, of the remote left air outlet 21. As is clear from the table in FIG. 7 and the graph in FIG. 8, the wind speed is around 0.5 to 0.64 m / sec near the tray 14 irrespective of the difference in height, the distance from the pressure adjustment chamber, and the like. Are concentrated at 0.51 to 0.58 m / sec, and it can be seen that the variation is small. At this time, the air volume of the air supply device 4 was 1650 m ³ / h.

In addition, using a conventional plant cultivation shelf as shown in FIG. 9, how the wind speed changes at various points on the shelf was measured and compared with the plant cultivation shelf 2 of the present invention. The conventional plant cultivation shelf shown in FIG. 9 has four stages of shelves 90, a horizontal dimension of the shelves of 5 m (6 m in the case of the present invention), and a fan 91 for sending wind to the right end position of each stage of the shelves 90. The wind speed was measured at the center position in the front-rear direction at the right end position, the center position (about 3 m) and the left end position for each stage. As for the plant cultivation shelf 2 of the present invention, the wind speed was measured at the center position in the front-rear direction at the right end position, the center position, and the left end position for each stage. When measuring the wind speed of each stage, in order to make the same conditions as in the comparative example, two of the three blower tubes 6 in the front-rear direction of the stage are closed, and the wind is blown only from the middle blower tube 6. The measurement was performed in a state where appeared. FIG. 10 shows the measurement results.
As is clear from FIG. 10, in the conventional plant cultivation shelf of the comparative example, the wind speed is as large as about 1 m / s at the right end position near the fan, the wind speed attenuates as the distance from the fan increases, and about 0.2 m at the left end position. / S. On the other hand, in the plant cultivation shelf 2 of the present invention, the wind speed is hardly attenuated over the entire width of the 6 m shelf, and the wind speed is maintained at 0.53 to 0.63 m / s.

As described above, the blower 3 for plant cultivation shelves of the present invention is provided with the pressure adjustment chamber 5 in the vertical direction on the side of the plant cultivation shelf 2, so that each stage of the plant cultivation shelf 2 is provided. Can be directly connected to the pressure adjustment chamber 5 without pressure loss. In addition, by sending air toward the plants 16 through the air blow pipes 6, 6,. Since the wind does not attenuate as it moves away from 5, it is possible to uniformly send appropriate wind to all the plants 16 on the shelf, and to perform uniform growth. Further, in the blower 3 of the present invention, the air supply device 4 sucks the room air in which the carbon dioxide concentration is adjusted and supplies it to the pressure adjustment chamber 5, so that the air having the appropriate carbon dioxide concentration can be sent to the plant 16. In addition, the photosynthesis of the plant 16 is activated, the growth is improved, and the carbon dioxide concentration is adjusted in the entire room 8, so that the adjustment is simple.
The blower device 3 can send air in a balanced manner to all the blower tubes 6, 6,... By making the lengths of the blower tubes 6, 6,.
In addition, the blower 3 can blow air to all the stages of the plant cultivation shelf 2 with one air supply device 4 and is low in cost. Furthermore, the blower 3 only needs to connect the air supply 4 directly to the pressure adjustment chamber 5 and connect the blower pipes 6, 6,... To the air outlet 7 of the pressure adjustment chamber 5 without the need for a complicated duct or the like. And can be easily installed.

  Since the plant cultivation apparatus 1 of the present invention includes the above-described blower 3, it is possible to uniformly send appropriate wind to all the plants 16 on the plant cultivation shelf 2, and to perform uniform growth. Moreover, the air supply device 4 of the blower device 3 sucks the room air having the adjusted carbon dioxide concentration and supplies the air to the pressure adjusting chamber 5, so that the air having the appropriate carbon dioxide concentration can be sent to the plant 16, In addition, the photosynthesis 16 becomes active and the growth is improved, and the adjustment of the carbon dioxide concentration is performed in the entire room 8, so that the adjustment is simple.

  The invention is not limited to the embodiments described above. The size, form, and the like of the plant cultivation shelf can be appropriately changed. The size of the pressure adjustment chamber, the length and number of air blow tubes, and the like are changed according to the size of the plant cultivation shelf. The blower tube is not limited to one having a hole (air outlet) formed in the tube, and a sock duct capable of discharging air from the entire length can also be used.

DESCRIPTION OF SYMBOLS 1 Plant cultivation apparatus 2 Plant cultivation shelf 3 Blower 4 Air supply device 5 Pressure adjustment room 6 Blower tube 7 Air outlet

Claims (2)

  An air supply device, a pressure adjustment chamber, and a blower tube are provided, and the air supply device sucks in room air whose carbon dioxide concentration has been adjusted and supplies the air to the pressure adjustment room. It is provided in the vertical direction on the side of the shelf, the internal pressure is kept constant, an air outlet is provided for each stage of the plant cultivation shelf, and one end of the blower pipe is pressure adjusted A blower for a plant cultivation shelf, which is connected to an air outlet of a room.   A plant cultivation shelf and a blower are provided, and the blower has an air supply device, a pressure adjustment chamber, and a blower tube, and the air supply device sucks air in the room in which the carbon dioxide concentration is adjusted to generate a pressure. The pressure adjustment chamber is provided in the vertical direction on the side of the plant cultivation shelf, the internal pressure is kept constant, and air is supplied to each stage of the plant cultivation shelf. A plant cultivation apparatus, wherein an air outlet is provided, and one end of the blower tube is connected to an air outlet of a pressure adjustment chamber.

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