JP6586775B2 - Plant cultivation apparatus and plant cultivation method - Google Patents

Description

  The present invention relates to a plant cultivation apparatus and a plant cultivation method for cultivating a plant through a liquid in a plant cultivation cylinder erected in a vertical direction.

  Plants such as vegetables are cultivated indoors using artificial light. Cultivation facilities for this purpose have been studied (see, for example, Patent Document 1). The cultivation facility described in this document includes a water supply device that supplies water containing nutrients, an air conditioner that adjusts indoor temperature and humidity, a gas cylinder that supplies carbon dioxide gas, and an illuminator that illuminates, and circulates. Blowing means for blowing air is provided.

  In order to improve harvest efficiency, a plant cultivation device in which a plurality of pipes are erected and plants are arranged and placed in the extending direction of the pipes has been studied (for example, see Patent Document 2). The plant cultivation apparatus described in this document includes a nutrient solution pipe extending in the longitudinal direction for supplying a nutrient solution, and a plant pipe extending in the longitudinal direction for planting a cultivated plant. In addition, the plant pipe is provided with one or more branch pipes, each having a plant placement portion on which the cultivated plant is placed, arranged at a predetermined height width in a diagonally upward direction. Furthermore, nutrient solution supply means for supplying nutrient solution from the inside of the nutrient solution pipe to the inside of the branch pipe is provided.

JP 2012-80783 A JP 2014-217349 A

  In such plant cultivation, temperature adjustment is important. This temperature adjustment may be performed via an exhaust port provided on or next to the plant cultivation apparatus. In this case, in plant cultivation using a plant cultivation cylinder erected in the vertical direction, a temperature difference is likely to occur in the vertical direction, which may cause variation in plant growth.

  The present invention has been made in view of the above problems, and provides a plant cultivation apparatus and a plant cultivation method for improving environmental conditions in plant cultivation using a plant cultivation cylinder erected in the vertical direction.

  A plant cultivation apparatus that solves the above-mentioned problems is a plant cultivation apparatus in which a plurality of installation sections for arranging plants are formed in a longitudinal direction, and a hollow member in which a plurality of holes are formed is provided. A control unit connected to a detection unit for detecting an environmental condition of the space in the space where the plant cultivation cylinder is disposed, and the hollow member is provided with a carbon dioxide supply unit for circulating carbon dioxide gas. A controller is provided, and the controller changes the supply amount of the carbon dioxide supplied through the carbon dioxide supplier in response to a detection signal from the detector. Here, the environmental condition of the space refers to a condition that affects plant cultivation such as a temperature in the space, a temperature difference, and a concentration of carbon dioxide. Thereby, according to the detection signal from a detection part, since carbon dioxide gas is supplied from a plurality of holes formed in the standing hollow member, carbon dioxide gas is supplied to the whole plant cultivation cylinder, Environmental conditions can be improved by using gas.

  In the said plant cultivation apparatus, it is preferable that the said hollow member is a flame | frame which forms the said space. Thereby, a carbon dioxide gas can be supplied in space using the structural member of a plant cultivation apparatus.

  In the said plant cultivation apparatus, it is preferable that the said carbon dioxide supply part is provided in the upper part of the said flame | frame, and the connection pipe which connects several said carbon dioxide supply parts is provided. Thereby, since carbon dioxide is supplied to the frame via a connecting pipe connected at the upper part of the frame, carbon dioxide heavier than air can be circulated smoothly if the gas temperature is the same.

  In the said plant cultivation apparatus, the said detection part contains the temperature detection part which detects temperature, and the said control part controls the supply amount of the said carbon dioxide gas according to the temperature difference from several temperature detection parts. It is preferable to do. Thereby, when the temperature difference is large, the supply amount is increased and stirring is performed using carbon dioxide gas, so that the temperature difference can be reduced.

  In the said plant cultivation apparatus, the said detection part contains the density | concentration detection part which detects the density | concentration of a carbon dioxide gas, The said control part changes the supply amount of the said carbon dioxide gas according to the density | concentration of the carbon dioxide gas of the said space. It is preferable to control. Thereby, when the concentration of carbon dioxide gas is low, the supply amount is increased, so that the temperature difference can be reduced by stirring the carbon dioxide gas while efficiently performing photosynthesis.

  In the said plant cultivation apparatus, it is preferable to provide the light source with which the said plant is irradiated, and to supply the said carbon dioxide gas from the said hole to the said space while the said light source is lighting. Thereby, since carbon dioxide is supplied when the plant is irradiated with light, the plant can efficiently perform photosynthesis.

  ADVANTAGE OF THE INVENTION According to this invention, environmental conditions can be made favorable in the plant cultivation using the plant cultivation cylinder installed upright in the perpendicular direction.

The schematic block diagram explaining the whole structure of the plant cultivation apparatus in this indication. The plane sectional view of the plant cultivation device in this indication. The expanded sectional view of the principal part of the plant cultivation cylinder of the plant cultivation apparatus in this indication. The flowchart explaining the process sequence of the growth control process in this indication. 5 is a flowchart for explaining a processing procedure of a temperature difference adjustment control process in the present disclosure.

  Hereinafter, according to FIGS. 1-5, one Embodiment of a plant cultivation apparatus and a plant cultivation method is described. In the present embodiment, an edible plant (for example, a leaf material such as lettuce or kokusai) is cultivated as a plant.

  As shown in FIG. 1, the plant cultivation apparatus 10 of this embodiment has a substantially rectangular parallelepiped shape, and a plurality of pillars 11 are erected at intervals. Each column 11 is constituted by a hollow member in which a plurality of holes are formed in a row in the longitudinal direction and spaced apart from each other. Each column 11 is arranged so that the hole faces the central axis of the plant cultivation apparatus 10.

  A plurality of connecting members 13 that connect the plurality of pillars 11 are connected to the top of the pillars 11. The connecting member 13 is formed of a hollow member. The hollow portion of the connecting member 13 and the hollow portion of each column 11 are communicated. A carbon dioxide inflow portion 13 a is formed in the connecting member 13. The carbon dioxide inflow portion 13a is supplied with exhaust from an office 60 described later. This exhaust contains carbon dioxide (CO2) at a relatively high concentration. In this embodiment, the exhaust from the office 60 is referred to as carbon dioxide. Therefore, the connection portion between the upper end portion of the column 11 and the connecting member 13 functions as a carbon dioxide supply unit, and the carbon dioxide supplied to the hollow portion of the column 11 can flow out from each hole of the column 11. .

  A rectangular lower plate member 15 is attached to the column 11 at a predetermined height from the installation surface. An upper plate member 16 having the same shape as the lower plate member 15 is disposed on the upper surface of the column 11. The upper plate member 16 is disposed to face the lower plate member 15 with a space therebetween.

  As shown in FIG. 2, a plurality of cultivation beds 21 are arranged at intervals in the center of a space 20 surrounded by the pillars 11, the lower plate member 15, and the upper plate member 16. Each cultivation floor 21 is constituted by a plurality (four in this embodiment) of plant cultivation cylinders P1. Each plant cultivation cylinder P1 is erected so as to extend in the vertical direction (vertical direction).

  As shown in FIG. 3, a plurality of plant installation portions Pa are formed at predetermined intervals in each plant cultivation cylinder P1. In this embodiment, the plant installation part Pa is formed in one row with respect to the longitudinal direction (vertical direction) of the plant cultivation cylinder P1. The plant installation part Pa has a cylindrical shape and is connected in a predetermined direction (for example, 45 degrees) with respect to the longitudinal direction (vertical direction) of the plant cultivation cylinder P1. One end is opened in an oblique direction (for example, 45 degrees). Moreover, the edge part of the plant installation part Pa is opened diagonally upward, and it is comprised so that the culture medium G1 with which the plant seedling was planted can be hold | maintained. Moreover, the plant installation part Pa is formed in such a size that the root of the seedling is located in the plant cultivation cylinder P1 when a seedling is installed at the end.

  The lower plate member 15 shown in FIG. 1 has a through hole (not shown) penetrating downward. The through hole is opened in the lower tank 31 disposed below the lower plate member 15. The lower tank 31 stores a culture liquid (liquid) prepared by mixing fertilizer components and the like for growing plants. Furthermore, the culture solution that has flowed through the plant cultivation cylinder P1 flows into the lower tank 31 through the above-described through holes. The culture solution stored in the lower tank 31 is supplied to the upper side of the plant cultivation cylinder P1 via a pipe and a pump (not shown). In addition, in this embodiment, the culture solution supplied to the plant cultivation cylinder P1 is supplied to the plant planted in the culture medium G1 by passing down the inner wall surface of the plant cultivation cylinder P1.

  As shown in FIG. 2, a plurality of light sources 26 are arranged outside the cultivation floor 21. The light source 26 is a light source capable of adjusting the photon amount (photosynthesis photon flux density). In the present embodiment, a fluorescent lamp type LED (light emitting diode) extending in the vertical direction is used as the light source 26. Further, a reflector (not shown) is disposed outside the light source 26 so as to surround the side surface of the space 20.

  Furthermore, the plant cultivation apparatus 10 in FIG. 1 includes a plurality of temperature detection units 41 that detect the temperature of the space 20 surrounded by the reflector. Further, the plant cultivation apparatus 10 includes a carbon dioxide concentration detector 45 that measures the concentration of carbon dioxide in the space 20. The temperature detection unit 41 and the carbon dioxide concentration detection unit 45 are detection units that detect environmental conditions in the space, and are connected to the control unit 50.

The control unit 50 is connected to an input unit 55, a display unit 56, a supply pump 66 and a valve 67.
The input unit 55 is configured by an operation panel for inputting control start and stop to the control unit 50.
The display unit 56 includes a display that displays an input instruction, a current control state, and the like.

  The supply pump 66 and the valve 67 are provided in a gas supply pipe 65 that communicates the plant cultivation apparatus 10 and the office 60. The supply pump 66 pumps the exhaust (carbon dioxide gas) of the office 60 to the space 20 of the plant cultivation apparatus 10. The valve 67 adjusts the supply amount of carbon dioxide gas using the exhaust from the office 60.

The control unit 50 is a control means including a memory such as a CPU, a RAM, and a ROM. The control unit 50 includes a light amount control unit 51 and a blower control unit 52.
The light quantity control unit 51 performs variable control of the light quantum amount of the light source 26 and on / off control of the switch. The light quantity control unit 51 stores sunshine control data for controlling the light source 26 that irradiates the plant. In the sunshine control data, a pattern cycle time (a cycle of one pattern) and a sunshine control pattern related to the photon amount in the pattern cycle time are recorded. For example, in the sunshine control pattern, a pattern for adjusting the photon amount is set in the same way as the solar radiation pattern of daylight with a pattern cycle time of 24 hours. Therefore, when the light amount control unit 51 obtains an instruction to start the growth control process described later, the light amount control unit 51 obtains the current time from the system timer, and uses the stored sunshine control data to turn on and off the illumination mechanism unit of the light source 26. The variable control is instructed.

  The blower control unit 52 controls driving of the supply pump 66 and opening / closing of the valve 67 in accordance with detection signals from the temperature detection unit 41 and the carbon dioxide concentration detection unit 45. In this case, the ventilation control unit 52 stores opening degree data related to the opening degree of the valve 67 according to the carbon dioxide gas concentration. This opening degree is set to an opening degree that increases the amount of blown air as the carbon dioxide concentration in the space 20 of the plant cultivation apparatus 10 decreases. Moreover, the ventilation control part 52 has memorize | stored the tolerance | permissible_range temperature. This allowable range temperature is a temperature difference used for determining whether or not ventilation is necessary, and can be set to 2 degrees Celsius, for example.

  The office 60 is provided with a temperature detection unit 61 and air conditioning equipment 62. The temperature detector 61 detects the temperature of the office 60. The air conditioning equipment 62 adjusts the temperature of the office 60 to the set temperature based on the detected temperature from the temperature detector 61.

  Next, the effect | action of the plant cultivation apparatus 10 mentioned above is demonstrated using FIG.4 and FIG.5. In the present embodiment, carbon dioxide gas from the office 60 is supplied to the space 20 when the light source 26 is turned on or when a temperature difference occurs in the space 20. In the following, the explanation will be divided into the growth control process and the temperature difference adjustment control process.

(Growth control process)
First, the growth control process will be described with reference to FIG. This process is performed when a start instruction for the growth control process is input via the input unit 55.

  In this case, the control unit 50 executes a determination process as to whether or not to start light irradiation based on the pattern cycle time (step S1-1). Specifically, the light amount control unit 51 of the control unit 50 acquires the current time from the system timer and compares it with the lighting time of the pattern cycle time.

When it determines with it not being the start of light irradiation (in the case of "NO" in step S1-1), the control unit 50 continues determination processing (step S1-1).
On the other hand, when it is determined that the light irradiation is started (in the case of “YES” in Step S1-1), the control unit 50 executes a light irradiation process (Step S1-2). Specifically, the light quantity control unit 51 of the control unit 50 instructs the lighting mechanism unit of the light source 26 to turn on according to the sunshine control data. The illumination mechanism unit turns on the light source 26 in response to this instruction.

  Next, the control unit 50 performs a pump drive process (step S1-3). Specifically, the air blow control unit 52 of the control unit 50 outputs a drive signal to the drive unit of the supply pump 66 to drive the supply pump 66.

  Next, the control unit 50 executes a carbon dioxide concentration detection process (step S1-4). Specifically, the air blow control unit 52 of the control unit 50 acquires data regarding the carbon dioxide gas concentration (carbon dioxide (CO 2) concentration) in the space 20 of the plant cultivation apparatus 10 from the carbon dioxide gas concentration detection unit 45.

  Next, the control unit 50 executes an opening degree determination process according to the density (step S1-5). Specifically, the air blow control unit 52 of the control unit 50 specifies the opening degree according to the carbon dioxide concentration using the opening degree data.

  Next, the control unit 50 executes a valve control process (step S1-6). Specifically, the air blow control unit 52 of the control unit 50 controls the opening and closing of the valve 67 so that the specified opening degree is obtained. Thereby, the air of the ventilation volume according to the carbon dioxide gas concentration is supplied from the office 60 to the connection member 13 of the plant cultivation apparatus 10. Furthermore, it is supplied from the connecting member 13 to the space of the plant cultivation apparatus 10 through the holes of the pillars 11.

  And the control unit 50 performs the determination process whether it is completion | finish of light irradiation (step S1-7). Specifically, the light amount control unit 51 of the control unit 50 determines whether an off control instruction is output to the illumination mechanism unit of the light source 26 according to the sunshine control data. When the sunshine time has elapsed and an off control instruction is output, it is determined that the light irradiation has ended.

When it is determined that the light irradiation has not ended (in the case of “NO” in step S1-7), the air blowing control unit 52 of the control unit 50 repeats the processes after step S1-4.
On the other hand, when it determines with light irradiation having been complete | finished (in the case of "YES" in step S1-7), the control unit 50 performs a light extinction process (step S1-8). Specifically, the light amount control unit 51 of the control unit 50 outputs an OFF control instruction to the illumination mechanism unit. The illumination mechanism unit turns off the light source 26 in response to this instruction.

Next, the control unit 50 performs a pump stop process (step S1-9). Specifically, the air blowing control unit 52 of the control unit 50 outputs a stop signal to the drive unit of the supply pump 66 to stop the supply pump 66.
In addition, when ending the growth control process, an instruction to end the growth control process is input via the input unit 55.

(Temperature difference adjustment control processing)
Next, the temperature difference adjustment control process will be described with reference to FIG.
First, the control unit 50 performs a temperature measurement process (step S2-1). Specifically, the air blowing control unit 52 of the control unit 50 acquires data regarding the temperature in the space 20 of the plant cultivation device 10 from each temperature detection unit 41.

  Next, the control unit 50 performs a process for determining whether or not the temperature difference is within an allowable range (step S2-2). Specifically, the blower control unit 52 of the control unit 50 compares the acquired temperatures, specifies the minimum temperature and the maximum temperature, and calculates the maximum temperature difference using these. The calculated maximum temperature difference is compared with the stored allowable range temperature.

Here, when it is determined that the temperature difference is within the allowable range (in the case of “YES” in Step S2-2), the control unit 50 repeatedly executes the processes after Step S2-1.
On the other hand, when it is determined that the temperature difference exceeds the allowable range (in the case of “NO” in step S2-2), the control unit 50 performs a carbon dioxide concentration detection process (step S2-3). Specifically, the air blow control unit 52 of the control unit 50 acquires data regarding the carbon dioxide gas concentration (carbon dioxide (CO 2) concentration) in the space 20 of the plant cultivation apparatus 10 from the carbon dioxide gas concentration detection unit 45.

  Next, the control unit 50 executes a process for determining whether or not carbon dioxide gas is being supplied (step S2-4). Specifically, the air blow control unit 52 of the control unit 50 determines whether or not the supply pump 66 is in operation.

  If it is determined that carbon dioxide gas is being supplied ("YES" in step S2-4), the control unit 50 performs a process for adjusting the air flow rate (step S2-5). Specifically, the air blowing control unit 52 of the control unit 50 continues the operation of the supply pump 66, further opens the valve 67, and increases the amount of air (carbon dioxide gas) from the office 60.

  On the other hand, when it is determined that the carbon dioxide gas is not being supplied (in the case of “NO” in step S2-4), the control unit 50 executes a pump drive process (step S2-6). Specifically, the blower control unit 52 of the control unit 50 outputs a drive signal to the drive unit of the supply pump 66, drives the supply pump 66, and discharges carbon dioxide exhausted from the office 60 to each hole of the pillar 11. Erupt from.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) In this embodiment, the plant cultivation apparatus 10 includes a plant cultivation cylinder P1 and a pillar 11 that are erected in the vertical direction. The column 11 is composed of a hollow member in which a plurality of holes are formed. Carbon dioxide gas is supplied to the hollow portion of the column 11 so that the carbon dioxide gas can flow out from the hole. When the temperature difference in the space 20 in which the plant cultivation cylinder P1 is arranged is not within the allowable range (in the case of “NO” in Step S2-2), the control unit 50 adjusts the air flow rate (Step S2-5) or Pump drive processing (step S2-6) is executed. Thereby, carbon dioxide gas can be supplied to the whole plant cultivation cylinder P1. Furthermore, the temperature difference can be reduced using carbon dioxide gas.

  (2) In this embodiment, the pillar 11 that forms the space 20 of the plant cultivation apparatus 10 is used as a hollow member that allows carbon dioxide gas to flow out. Thereby, carbon dioxide gas can be supplied into the space 20 using the constituent members of the plant cultivation apparatus 10.

  (3) In the present embodiment, a plurality of connecting members 13 that connect these pillars 11 are connected to the upper part of the pillars 11. The connecting member 13 is formed of a hollow member. The hollow part of the connection member 13 and the hollow part of each column 11 are connected, and carbon dioxide gas is supplied. Thereby, since the carbon dioxide gas supplied to the pillar 11 circulates through the connecting member connected in the upper part of the pillar 11, if the gas temperature is the same, the carbon dioxide gas heavier than air can be circulated smoothly. .

  (4) In this embodiment, when the control unit 50 determines that the light irradiation is started (“YES” in step S1-1), the control unit 50 executes a pump driving process (step S1-3), and the light irradiation is performed. If it is determined that the process has ended (in the case of “YES” in step S1-7), a pump stop process is executed (step S1-9). Thereby, since carbon dioxide is supplied during the light irradiation to the plant, the plant can efficiently perform photosynthesis.

  (5) In the present embodiment, the control unit 50 executes an opening degree determination process (step S1-5) and a valve control process (step S1-6) according to the carbon dioxide gas concentration. Thereby, when the concentration of carbon dioxide gas is low, the supply amount is increased, so that the temperature difference can be reduced by stirring the carbon dioxide gas while efficiently performing photosynthesis.

  (6) In this embodiment, the carbon dioxide gas supplied to the space 20 of the plant cultivation apparatus 10 uses air in the office 60 whose temperature is adjusted by the air conditioning equipment 62. Thereby, while being able to use the air from the office 60 effectively, the temperature adjustment process in the plant cultivation apparatus 10 can be omitted.

Moreover, you may change the said embodiment as follows.
-The plant cultivation apparatus 10 of the said embodiment was provided with the four cultivation beds 21, and each cultivation floor 21 comprised the four plant cultivation pipes P1. The number and arrangement of cultivation beds of the plant cultivation device 10 and the number and arrangement of plant cultivation cylinders P1 constituting each cultivation floor are not limited to the above embodiment. Moreover, the plant cultivation cylinder P1 of the said embodiment comprised the plant installation part Pa in a line at intervals. The plant cultivation cylinder P1 is not limited to such a configuration, and for example, may be a configuration in which the plant installation parts Pa are arranged in a plurality of rows.

  -In the said embodiment, the pillar 11 of the plant cultivation apparatus 10 comprised the hollow member in which the several hole was formed in the longitudinal direction at intervals in a line. The size and arrangement of the holes of each pillar 11 are not limited to the same case.

Moreover, you may make it form a hole in the one part pillar 11 which comprises the plant cultivation apparatus 10. FIG.
Furthermore, a plurality of holes that open toward the space 20 may be formed in the connecting member 13. In this case, carbon dioxide gas can be ejected from above into the space 20.

  In the above embodiment, the carbon dioxide inflow portion 13 a is provided in the connecting member 13 provided on the top of the column 11. The connecting member 13 may be provided in the lower part or the center part of the pillar 11 and carbon dioxide may be supplied to the pillar 11 from other than the upper part.

  In the above embodiment, the control unit 50 executes the pump drive process in the temperature difference adjustment control process when the temperature difference is large and the carbon dioxide gas is not being supplied (in the case of “NO” in step S2-4). (Step S2-6). In this process, when the carbon dioxide gas is not being supplied, the air at the place where the plant cultivation apparatus 10 is disposed may be taken in by the pump instead of being exhausted from the office 60 and supplied to the pillar 11. The temperature difference is not limited to the maximum temperature difference between the lowest temperature and the highest temperature in the space 20. For example, it may be determined whether the absolute values of the minimum temperature and the maximum temperature and the set temperature are within an allowable range.

  In the above embodiment, the control unit 50 supplies the carbon dioxide to the space 20 by controlling the valve 67 so that the flow rate corresponds to the carbon dioxide concentration in the space 20 of the plant cultivation apparatus 10. The control unit 50 may change the flow rate supplied to the space 20 according to the carbon dioxide concentration in the office 60 and the room temperature. In this case, the control unit 50 is connected to a CO2 concentration detection unit that detects the carbon dioxide concentration in the office 60 and a temperature detection unit that detects the temperature in the office 60. The control unit 50 stores opening degree data corresponding to the carbon dioxide concentration and temperature in the office 60. And the control unit 50 determines the opening degree according to the detection signal from a CO2 density | concentration detection part or a temperature detection part using opening degree data, and performs valve | bulb control processing. Thereby, even if the concentration of dioxide in the office 60 is low, carbon dioxide can be supplied to the space 20 of the plant cultivation apparatus 10.

  In the above embodiment, the exhaust air from the office 60 is supplied to the space 20 of the plant cultivation apparatus 10 as carbon dioxide gas. Not only this but the space 20 of the plant cultivation apparatus 10 may supply the carbon dioxide gas generated by the carbon dioxide generator.

  In the above embodiment, the control unit 50 performs the growth control process and the temperature difference adjustment control process, but may perform either one. Moreover, in the growth control process, the control unit 50 executed a carbon dioxide concentration detection process (Step S1-4) and an opening degree determination process (Step S1-5) according to the concentration. Instead of this, the control unit 50 may execute a temperature detection process and an opening degree determination process according to the temperature difference. In this case, opening degree data according to temperature is used. Further, the control unit 50 may execute the determination process of the opening degree according to the concentration and the temperature using the opening degree data according to the temperature and the carbon dioxide concentration.

  -In the said embodiment, the plant cultivation apparatus 10 demonstrated as cultivating leaf materials, such as a lettuce and a Chinese cabbage. The plant to grow is not limited to this, For example, plants, such as a camellia, may be sufficient.

  G1 ... medium, P1 ... plant cultivation tube, Pa ... plant installation part, 10 ... plant cultivation device, 11 ... pillar, 13 ... connecting member, 13a ... carbon dioxide inflow part, 15 ... lower plate member, 16 ... upper plate member, DESCRIPTION OF SYMBOLS 20 ... Space, 21 ... Cultivation floor, 26 ... Light source, 31 ... Lower tank, 41, 61 ... Temperature detection part, 45 ... Carbon dioxide gas concentration detection part, 50 ... Control unit, 51 ... Light quantity control part, 52 ... Air blow control part , 55 ... input section, 56 ... display section, 60 ... office, 62 ... air conditioning equipment, 65 ... gas supply pipe, 66 ... supply pump, 67 ... valve.

Claims (5)

A plant cultivation apparatus in which a plurality of installation parts for arranging plants are vertically arranged in a longitudinal direction.
Erecting a hollow member formed with a plurality of holes,
While providing a carbon dioxide gas supply part for circulating carbon dioxide gas in the hollow member,
A control unit connected to the concentration detecting unit for detecting the concentration of carbon dioxide between empty the plant cultivation tube is arranged provided,
The hollow member is a frame forming the space,
Wherein the control unit is, in response to said detection signal from the density detecting unit, when the concentration of the carbon dioxide is low, change so that the supply amount of the carbon dioxide gas is increased to supply through the carbon dioxide gas supply unit A plant cultivation apparatus characterized by that. The carbon dioxide supply part is provided on the upper part of the frame,
The plant cultivation apparatus according to claim 1 , further comprising a connecting pipe that connects the plurality of carbon dioxide supply units. The controller is further connected to a temperature detector that detects temperature ,
Wherein the control unit, in response to the temperature difference between the plurality of temperature detection unit, and when the temperature difference is large, according to claim 1 or 2, characterized by controlling so as to increase the supply amount of the carbon dioxide plant cultivation apparatus according to. A light source for irradiating the plant;
The plant cultivation apparatus according to any one of claims 1 to 3 , wherein the carbon dioxide gas is supplied to the space from the hole while the light source is turned on. It is a plant cultivation method using a plant cultivation apparatus in which a plurality of installation parts for arranging plants are vertically arranged in the longitudinal direction.
The plant cultivation apparatus is erected with a hollow member formed with a plurality of holes,
The hollow member is a frame forming a space in which the plant cultivation cylinder is arranged,
Carbon dioxide gas is circulated through the hollow member,
When the temperature difference in the space where the plant cultivation cylinder is arranged exceeds an allowable range, carbon dioxide gas is caused to flow out from the hole of the hollow member.

Images