Circulation-type carbon dioxide supply method and smart farm system using same method

Abstract

The present invention relates to a circulation-type carbon dioxide supply method and a smart farm system using the same method. The circulation-type carbon dioxide supply method may comprise the steps of: setting, by a control device for a pair of chambers, light and darkness phases for a pair of chambers; generating, by the control device for the pair of chambers, respiration of crops of cultivation racks in the pair of chambers on the basis of oxygen generated in the light phase in the pair of chambers; and generating, by the control device for the pair of chambers, photosynthesis of crops of the cultivation racks in the pair of chambers on the basis of carbon dioxide generated in the darkness period phase in the pair of chambers.

Description

Circulating carbon dioxide supply method and smart farm system using such method

[0001] The present invention relates to a cyclic carbon dioxide supply method and a smart farm system using such a method. More specifically, the present invention relates to a cyclic carbon dioxide supply method for utilizing carbon dioxide generated during memorization, and a smart farm system using such a method.

[0002] In modern society, plants are cultivated using facility cultivation for a variety of reasons. Facilities are used to protect crops from weather conditions that affect plant growth and productivity, optimize the crop growth environment by controlling temperature and humidity, protect crops from pests, diseases, and (wild) animals, and overcome seasonal constraints to increase crop productivity. Furthermore, facility cultivation reduces soil moisture loss and conserves water, thereby enhancing the sustainability of crop production. Facilities play a crucial role in enhancing plant productivity and protecting plants from the effects of climate and weather conditions, and their effectiveness is steadily increasing. Furthermore, recent advancements in science and technology have enabled the introduction of automated plant factories and smart farm systems that control optimal plant growth conditions, leading to innovative developments in the facility cultivation industry.

[0003] However, smart farm systems, which control the crop cultivation environment through environmental control, require higher installation and maintenance costs than open-field cultivation, increasing production costs. Therefore, efficient plant cultivation facilities that can reduce both installation and maintenance costs are needed.

[0004] The environmental control technology of smart farm systems contributes to increased farm income by regulating crop growth, resulting in increased yield per unit area, improved quality, and shorter harvest times. Carbon dioxide fertilization, a method of providing high concentrations of carbon dioxide to crops in greenhouse horticulture, increases sugar content in the crops and boosts yield, contributing to increased farm income. To achieve this, additional carbon dioxide supply equipment is required within smart farm systems, resulting in significant capital investment in installation costs.

[0005] Research is needed on how to reduce the costs associated with building carbon dioxide supply systems in smart farm systems and how this can contribute to increased farm income.

[0006] The purpose of the present invention is to solve all of the above-described problems.

[0007] In addition, the present invention aims to provide a cyclic carbon dioxide supply smart farm system that utilizes carbon dioxide generated during the dark period as a carbon source used by crops for photosynthesis during the light period.

[0008] In addition, the present invention aims to reduce installation and maintenance costs in a smart farm system by utilizing carbon dioxide generated during dark period during light period instead of a carbon dioxide supply device installed to increase crop growth and sugar content.

[0009] A representative configuration of the present invention to achieve the above purpose is as follows.

[0010] According to one embodiment of the present invention, a circulating carbon dioxide supply method may include a step in which a pair chamber control device sets a bright period and a dark period for a pair chamber, a step in which the pair chamber control device causes respiration of crops in a cultivation rack within the pair chamber based on oxygen generated in the bright period in the pair chamber, and a step in which the pair chamber control device causes photosynthesis of crops in a cultivation rack within the pair chamber based on oxygen dioxide generated in the dark period in the pair chamber.

[0011] Meanwhile, the pair chamber can operate in a fixed LED operation mode, a cross LED operation mode, or an independent circulation operation mode based on the control of the luminescent device and the dark device, whether the cultivation rack moves, and whether air conditioning is required for the exchange of oxygen and carbon dioxide.

[0012] Additionally, the pair chamber includes a first chamber and a second chamber, the first chamber includes a first cultivation rack, the second chamber includes a second cultivation rack, and the first chamber and the second chamber can be sealed except when air conditioning is required.

[0013] According to another embodiment of the present invention, in a pair chamber control device performing a circulating carbon dioxide supply method, the pair chamber control device can set a bright period and a dark period for the pair chamber, cause respiration of crops in a cultivation rack within the pair chamber based on oxygen generated in the bright period in the pair chamber, and cause photosynthesis of crops in a cultivation rack within the pair chamber based on oxygen dioxide generated in the dark period in the pair chamber.

[0014] Meanwhile, the pair chamber can operate in a fixed LED operation mode, a cross LED operation mode, or an independent circulation operation mode based on the control of the luminescent device and the dark device, whether the cultivation rack moves, and whether air conditioning is required for the exchange of oxygen and carbon dioxide.

[0015] Additionally, the pair chamber includes a first chamber and a second chamber, the first chamber includes a first cultivation rack, the second chamber includes a second cultivation rack, and the first chamber and the second chamber can be sealed except when air conditioning is required.

[0016] According to the present invention, a cyclic carbon dioxide supply smart farm system can be provided that utilizes carbon dioxide generated during the dark period as a carbon source for photosynthesis by crops during the light period.

[0017] In addition, according to the present invention, instead of installing a carbon dioxide supply device to increase crop growth and sugar content, carbon dioxide generated during dark period is utilized during light period, thereby reducing installation and maintenance costs in a smart farm system.

[0018] Figure 1 is a conceptual diagram illustrating a smart farm system according to the present embodiment.

[0019] Figure 2 is a conceptual diagram showing an LED fixing operation method according to an embodiment of the present invention.

[0020] Figures 3 and 4 are conceptual diagrams showing an LED cross operation method according to an embodiment of the present invention.

[0021] Figure 5 is a conceptual diagram illustrating an independent circulation operation method according to an embodiment of the present invention.

[0022] Figure 6 is a conceptual diagram illustrating an independent circulation operation method according to an embodiment of the present invention.

[0023] The following detailed description of the present invention refers to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention, while different from each other, are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be modified and implemented from one embodiment to another without departing from the spirit and scope of the present invention. Furthermore, it should be understood that the positions or arrangements of individual components within each embodiment may also be modified without departing from the spirit and scope of the present invention. Accordingly, the following detailed description is not to be taken in a limiting sense, and the scope of the present invention is to be construed to encompass the scope of the claims and all equivalents thereof. Like reference numerals in the drawings represent the same or similar elements throughout the several aspects.

[0024] Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the attached drawings so that a person having ordinary skill in the art to which the present invention pertains can easily practice the present invention.

[0025] Photosynthesis in plants utilizes sunlight to combine carbon dioxide and water to produce glucose and oxygen. Separately, during the dark, plants perform respiration, utilizing previously generated energy to produce various physiologically active substances, which generate water and carbon dioxide. Carbon dioxide plays a crucial role in photosynthesis in plants, and recently, supplementing carbon dioxide in greenhouses has become a widely used fertilization method to enhance plant growth, yield, and quality. A separate carbon dioxide supply device is typically used to provide this additional carbon dioxide. The operation of the carbon dioxide supply device increases the equipment and maintenance costs in greenhouse cultivation.

[0026] Smart farm systems can influence crop growth by artificially controlling the inflow of external air through environmental control. During memorization, carbon dioxide concentrations in the cultivation area within smart farm facilities increase to approximately 1,500 ppm, approximately four times the concentration in the general atmosphere.

[0027] In a circulating carbon dioxide supply method according to an embodiment of the present invention, by utilizing carbon dioxide generated during memorization, it is possible to supply carbon dioxide without a separate carbon dioxide supply device, and the quality of crops can be improved while reducing equipment costs and facility maintenance costs.

[0028]

[0029] Figure 1 is a conceptual diagram illustrating a smart farm system according to the present embodiment.

[0030] In Fig. 1, a method for supplying carbon dioxide based on a pair chamber is disclosed.

[0031] Referring to FIG. 1, the smart farm system may include a first chamber (110) and a second chamber (120) as pair chambers. For convenience of explanation, it is assumed that the smart farm system has one pair chamber, but multiple pair chambers may be included in one smart farm system.

[0032] In the present invention, the first chamber (110) and the second chamber (120) can be configured to have different dark chambers so that carbon dioxide generated in the dark chamber can be utilized for photosynthesis in the light chamber. Furthermore, oxygen generated in the light chamber can also be utilized for respiration in the dark chamber.

[0033] In each of the first chamber (110) and the second chamber (120) of the present invention, a cultivation rack for growing crops may be installed, and at least one of the first chamber (110) and the second chamber (120) may be installed with an LED to set a light period and a dark period for crop cultivation. The first chamber (110) and the second chamber (120) may include an air conditioning structure for exchanging carbon dioxide generated in the dark period and oxygen generated in the light period. In addition, the air conditioning structure may be blocked or absent depending on the operating method of the pair chamber.

[0034] For example, the first chamber (110) is set as a dark period, and carbon dioxide produced in the dark period by respiration of crops in the first chamber (110) can be transferred to the second chamber (120) at a specific time and utilized for photosynthesis of crops in the second chamber (120). The second chamber (120) is set as a light period, and oxygen produced in the light period by crops in the second chamber (120) can be transferred to the first chamber (110) at a specific time and utilized for respiration of crops in the first chamber (110). In this way, photosynthesis based on a high carbon dioxide concentration in the light period can be achieved, and photosynthesis based on a high concentration of carbon dioxide can occur without a carbon dioxide supply device. In addition, conversely, oxygen required for the dark period can be supplied.

[0035] The pair chamber can be set up in LED fixed operation mode (150), LED cross operation mode (160), and self-split operation mode (170) considering different LED settings, light / dark settings, and whether air conditioning is required.

[0036] Hereinafter, the LED fixed operation method (150), LED cross operation method (160), and independent circulation operation method (170) are specifically disclosed based on the control of the light and dark, movement of the cultivation rack, and the need for air conditioning for the exchange of oxygen and carbon dioxide.

[0037] The pair chambers may be assembled or implemented with different structures for the LED fixed operation mode (150), LED cross operation mode (160), and independent circulation operation mode (170). Alternatively, the pair chambers may be implemented identically, but set to the LED fixed operation mode (150), LED cross operation mode (160), and independent circulation operation mode (170), so that the LED fixed operation mode, LED cross operation mode, and independent circulation operation mode may be performed.

[0038] There may be a pair chamber control device for pair chamber control, and the pair chamber control device may set a light period and a dark period for the pair chamber, and may cause respiration of crops in the cultivation rack within the pair chamber based on oxygen generated in the light period in the pair chamber, and may cause photosynthesis of crops in the cultivation rack within the pair chamber based on oxygen dioxide generated in the dark period in the pair chamber.

[0039] Alternatively, the pair chamber control device may set different operation modes or perform different operation controls (such as control of the light / dark control, control of the cultivation rack operation, and control of the air conditioning system) depending on the crops being grown within the pair chamber.

[0040] In addition, in the embodiments of the present invention, the expression “LED” was used for convenience of explanation, but a light source other than an LED may be used, and such embodiments may also be included in the scope of the present invention.

[0041]

[0042] Figure 2 is a conceptual diagram showing an LED fixing operation method according to an embodiment of the present invention.

[0043] In Fig. 2, a method for exchanging carbon dioxide and oxygen in an LED fixed operation mode is disclosed.

[0044] Referring to FIG. 2, in the LED fixation operation method, the LED of the first chamber (210) may be absent or continuously maintained in an OFF state, and the LED of the second chamber (220) may be continuously maintained in an ON state. That is, the dark state may be maintained in a fixed state in the first chamber (210), and the light state may be maintained in a fixed state in the second chamber (220).

[0045] In the first chamber (210), the dark phase is maintained, and carbon dioxide generated by the respiration of the crops can accumulate in the dark phase. In the second chamber (220), the light phase is maintained, and oxygen generated by the photosynthesis of the crops can accumulate in the light phase.

[0046] Carbon dioxide generated in the first chamber (210) and oxygen generated in the second chamber (220) can be exchanged with each other during a set exchange period. That is, carbon dioxide generated in the first chamber (210) can be moved to the second chamber (220) for photosynthesis of crops in the second chamber (220), and oxygen generated in the second chamber (220) can be moved to the first chamber (210) for respiration of crops in the second chamber (220). The exchange period can be set according to the carbon dioxide concentration in the first chamber (210), the oxygen concentration in the second chamber (220), and the crops grown in the first chamber (210) and the second chamber (220).

[0047] The first chamber (210) and the second chamber (220) may be sealed rooms, and carbon dioxide and oxygen may be exchanged through an air conditioning facility located between the first chamber (210) and the second chamber (220).

[0048] Additionally, during the exchange period or a separately set cultivation rack exchange period, an exchange may be performed between the first cultivation rack (215) located in the first chamber (210) and the second cultivation rack (225) located in the second chamber (220). That is, the first cultivation rack (215) that has undergone a dark period in the first chamber (210) may be moved to the second chamber (220) and may undergo a light period. Conversely, the second cultivation rack (225) that has undergone a light period in the second chamber (220) may be moved to the first chamber (210) and may undergo a dark period.

[0049] In this way, the light and dark periods are fixed in the first chamber (210) and the second chamber (220), but when the cultivation racks (215, 225) are exchanged, crops grown in the cultivation racks can photosynthesize based on a high concentration of carbon dioxide in the light period and breathe based on a high concentration of oxygen in the dark period.

[0050]

[0051] Figures 3 and 4 are conceptual diagrams showing an LED cross operation method according to an embodiment of the present invention.

[0052] In Fig. 3, a method for exchanging carbon dioxide and oxygen in an LED cross-operation mode is disclosed.

[0053] Referring to FIG. 3, a method for growing crops in a first chamber (310) and a second chamber (320) without moving a cultivation rack while maintaining different dark and light states in the first chamber (310) and the second chamber (320) is disclosed.

[0054] More specifically, in the LED cross-operation method, the first chamber (310) and the second chamber (320) can alternately perform the light and dark operations by dividing the time intervals. In the first time interval, the first chamber (310) can keep the LED in the ON state, and the second chamber (320) can keep the LED in the OFF state. In the second time interval, the first chamber (310) can keep the LED in the OFF state, and the second chamber (320) can keep the LED in the ON state.

[0055] That is, in the first time interval, the first chamber (310) may be a light chamber and the second chamber (320) may be a dark chamber, and that is, in the second time interval, the first chamber (310) may be a dark chamber and the second chamber (320) may be a light chamber. Here, the first time interval may be from 0:00 to 12:00, and the second time interval may be from 12:00 to 24:00. Oxygen and carbon dioxide may be exchanged in the first exchange interval (for example, 6:00) included in the first time interval, and in the second exchange interval (for example, 18:00) included in the second time interval. The first time interval, the first exchange interval, the second time interval, and the second exchange interval are exemplary, and may be set in various ways depending on the crop and the climate, and such embodiments may also be included in the scope of the present invention.

[0056] In Fig. 4, the operation of the first chamber (410) and the second chamber (420) is initiated in the first time interval and the second time interval. The first time interval and the second time interval can be repeated.

[0057] FIG. 4 (a) illustrates the operation of the first chamber (410) and the second chamber (420) in the first exchange section (450) of the first time section. The first exchange section (450) of the first time section may be a section in which oxygen generated in the first chamber (410) is transferred to the second chamber (420) and carbon dioxide generated in the second chamber (420) is transferred to the first chamber (410). The first exchange section (450) of the first time section may vary depending on the setting and may be set to, for example, 6 hours after the start time of the first time section. The first exchange section (450) may be determined based on the oxygen concentration of the first chamber (410) and / or the carbon dioxide concentration of the second chamber (420).

[0058] Referring to (a) of FIG. 4, in the first time interval, the first chamber (410) can maintain light with the LED ON state, and the second chamber (420) can maintain dark with the LED OFF state. In the first exchange interval (450) of the first time interval, carbon dioxide generated by respiration of crops in the second chamber (420) can be supplied to the first chamber (410). The crops in the first chamber (410) can perform photosynthesis based on the carbon dioxide supplied from the second chamber (420) to consume carbon dioxide and produce oxygen. In addition, in the first exchange interval (450) of the first time interval, oxygen generated by photosynthesis of crops in the first chamber can be supplied to the second chamber (420). The crops in the second chamber (420) can perform respiration based on the oxygen supplied from the first chamber (410) to consume oxygen and produce carbon dioxide.

[0059] After the first exchange section (450), the sealed state is maintained, and the oxygen concentration due to photosynthesis may increase in the first chamber (410), and the carbon dioxide concentration due to respiration may increase in the second chamber (420). The first exchange section (450) may be set multiple times within the first time section.

[0060] Figure 4 (b) shows the operation of the first chamber (410) and the second chamber (420) in the second exchange section (460) of the second time section.

[0061] Referring to (b) of FIG. 4, in the second time interval, the first chamber (410) can maintain the dark state with the LED OFF, and the second chamber (420) can maintain the light state with the LED ON.

[0062] In the second exchange section of the second time interval, oxygen produced by photosynthesis of crops in the second chamber (420) can be supplied to the first chamber (410). The crops in the second chamber (420) can perform photosynthesis based on the carbon dioxide supplied from the first chamber (410) to consume carbon dioxide and produce oxygen. In addition, in the second exchange section (460) of the second time interval, oxygen produced by photosynthesis of crops in the second chamber (420) can be supplied to the first chamber (410). The crops in the first chamber (410) can perform respiration based on the oxygen supplied from the second chamber (420) to consume oxygen and produce carbon dioxide.

[0063] After the second exchange section (460), the sealed state is maintained, and the oxygen concentration due to photosynthesis may increase in the second chamber (420), and the carbon dioxide concentration due to respiration may increase in the first chamber (410). The second exchange section (460) may be set multiple times within the second time section.

[0064]

[0065] Figure 5 is a conceptual diagram illustrating an independent circulation operation method according to an embodiment of the present invention.

[0066] In FIG. 5, a method for utilizing carbon dioxide and oxygen generated inside a chamber without exchange of oxygen / carbon dioxide between chambers through an independent circulation operation method is disclosed.

[0067] Referring to FIG. 5, the first chamber (510) and the second chamber (520) can be separated in order to independently exchange oxygen and carbon dioxide in each of the first chamber (510) and the second chamber (520).

[0068] In the first chamber (510), in the first time period (550), the light is maintained with the LED ON, and oxygen can be generated through photosynthesis and carbon dioxide can be consumed. Thereafter, in the second time period (560), the dark is maintained with the LED OFF, and oxygen can be generated through respiration. These first time periods (550) and second time periods (560) can be repeated, and in the first time period (550), photosynthesis can be performed using the oxygen dioxide generated and concentrated in the second time period (560). In the second time period (560), respiration can be performed using the oxygen generated and concentrated in the first time period (550).

[0069] Likewise, in the second chamber (520), the light can be maintained with the LED ON in the first time period (550), oxygen can be generated through photosynthesis, and carbon dioxide can be consumed. Thereafter, in the second time period (560), the dark can be maintained with the LED OFF, and oxygen can be generated through respiration. These first time periods (550) and second time periods (560) can be repeated, and in the first time period (550), photosynthesis can be performed using the oxygen dioxide generated and concentrated in the second time period (560). In the second time period (560), respiration can be performed using the oxygen generated and concentrated in the first time period (550).

[0070] In this way, the first chamber (510) and the second chamber (520) can independently concentrate oxygen and carbon dioxide to create an environment in which crops can be grown without exchanging oxygen and carbon dioxide between the chambers.

[0071] The independent circulation operation mode may operate individually rather than as a pair of chambers, and such embodiments may also be included within the scope of the present invention. For example, the first chamber (510) and the second chamber (520) may operate as individual units. The chamber control device may control the operation of the chambers disclosed in FIG. 5.

[0072] Specifically, a chamber control device that performs a cyclic carbon dioxide supply is configured such that the chamber control device maintains a light state in the chamber with the LED ON for a first time period, maintains a dark state in the chamber with the LED OFF for a second time period, and the first time period and the second time period are repeated, and in the first time period, photosynthesis is performed using oxygen dioxide generated and concentrated in the second time period, and in the second time period, respiration is performed using oxygen generated and concentrated in the first time period.

[0073]

[0074] Figure 6 is a conceptual diagram illustrating an independent circulation operation method according to an embodiment of the present invention.

[0075] In FIG. 6, a method for utilizing carbon dioxide and oxygen within a chamber without exchange of oxygen / carbon dioxide between chambers through an independent circulation operation method is disclosed.

[0076] Referring to Fig. 6, a self-division method can also be performed by exchanging the light and dark periods in a chamber group (600) unit including multiple chambers. Assuming that the first time interval (650) and the second time interval (660) are repeated, crops within the chamber group (600) can perform photosynthesis based on the high concentration of carbon dioxide accumulated in the second time interval (660), which is the dark period, during the first time interval (650), which is the light period.

[0077] Additionally, crops within the chamber group (600) can respire based on the high concentration of oxygen accumulated in the first time period (650) during the second time period (660).

[0078]

[0079] The embodiments of the present invention described above may be implemented in the form of program commands that can be executed through various computer components and recorded on a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, etc., either singly or in combination. The program commands recorded on the computer-readable recording medium may be specially designed and configured for the present invention or may be known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specifically configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc. Hardware devices may be changed into one or more software modules to perform processing according to the present invention, and vice versa.

[0080] Although the present invention has been described above with specific details such as specific components and limited examples and drawings, these are provided only to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and those with ordinary knowledge in the technical field to which the present invention pertains can make various modifications and changes based on this description.

[0081] Therefore, the idea of ​​the present invention should not be limited to the embodiments described above, and not only the scope of the patent claims described below but also all scopes equivalent to or equivalently modified from the scope of the patent claims are considered to fall within the scope of the idea of ​​the present invention.

Claims

1. The circulating carbon dioxide supply method is: A step for the pair chamber control device to set the name and secret code for the pair chamber; The step of the above pair chamber control device causing the crops in the cultivation rack within the above pair chamber to respire based on the oxygen generated in the above pair chamber; and A method characterized in that the pair chamber control device comprises a step of causing photosynthesis of crops in the cultivation rack within the pair chamber based on oxygen dioxide generated in the dark chamber in the pair chamber.

2. In paragraph 1, A method characterized in that the above pair chamber operates in an LED fixed operation mode, an LED cross operation mode, or an independent circulation operation mode based on the control of the above-mentioned secret and the above-mentioned secret, whether the above-mentioned cultivation rack is moved, and whether air conditioning is required for the exchange of the oxygen and the above-mentioned carbon dioxide.

3. In paragraph 2, The above pair chamber includes a first chamber and a second chamber, The first chamber comprises a first cultivation rack, The second chamber comprises a second cultivation rack, A method characterized in that the first chamber and the second chamber are sealed except when air conditioning is required.

4. In a pair chamber control device performing a circulating carbon dioxide supply method, The above pair chamber control device sets a name and a secret key for the pair chamber, In the above fair chamber, the crops in the cultivation rack within the fair chamber are induced to respire based on the oxygen generated in the above fair chamber, A pair chamber control device characterized in that it causes photosynthesis of crops in a cultivation rack within the pair chamber based on oxygen dioxide generated in the dark chamber in the pair chamber.

5. In paragraph 4, The pair chamber control device is characterized in that the pair chamber operates in an LED fixed operation mode, an LED cross operation mode, or an independent circulation operation mode based on the control of the above-mentioned famous and famous characters, whether the cultivation rack is moved, and whether air conditioning is required for the exchange of the oxygen and the carbon dioxide.

6. In paragraph 5, The above pair chamber includes a first chamber and a second chamber, The first chamber comprises a first cultivation rack, The second chamber comprises a second cultivation rack, A pair chamber control device, characterized in that the first chamber and the second chamber are sealed except when air conditioning is required.

7. The circulating carbon dioxide supply method is: A step of the chamber control device maintaining the LED ON status in the chamber for a first time period; and The chamber control device comprises a step of maintaining the chamber in the LED OFF state for a second time period, The above first and second time intervals are repeated, In the above first time interval, photosynthesis is performed using oxygen dioxide generated and concentrated in the above second time interval. A method characterized in that, in the second time interval, respiration is performed using oxygen generated and concentrated in the first time interval.

8. The chamber control device that performs circulating carbon dioxide supply is: The chamber control device maintains the LED ON status in the chamber for the first time period, In the above chamber, the second time period is maintained with the LED OFF, The above first and second time intervals are repeated, In the above first time interval, photosynthesis is performed using oxygen dioxide generated and concentrated in the above second time interval. A chamber control device characterized in that, in the second time period, respiration is performed using oxygen generated and concentrated in the first time period.

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