JP2023084598A - plant cultivation system - Google Patents

Abstract

To provide a plant cultivation system that can easily create an environment suitable for plant cultivation at optimum energy consumption.SOLUTION: A plant cultivation system 10 comprises: a solar cell module 12; an illumination device 38; a first sheet 14 which is arranged on a side part, and transmits and diffuses light; a second sheet 16 which is arranged on an inner side than the first sheet 14, and transmits and diffuses light; an air conditioner 38 which adjusts temperature and humidity of an indoor space 20; an opening/closing device 28 which takes up or down the first sheet 14 and the second sheet 16; an irrigation apparatus 40 which gives water to plants; a storage battery 50 which stores electric power generated by the solar cell module 12; and means for controlling electric power supply from the storage battery 50 or the power transmission system 52 to a load 54 including the illumination device 36, the air conditioner 38 and the irrigation apparatus 40.SELECTED DRAWING: Figure 1

Description

The present invention relates to a plant cultivation system for cultivating plants.

Plant cultivation systems have been developed for cultivating plants without being influenced by the weather. Since the plant cultivation system uses a lighting device, an air conditioner, and the like, electric power is required. Therefore, it is considered to reduce the environmental load by using a solar cell module as in Patent Document 1 below.

However, simply generating electricity with a solar cell module, lighting a lighting device, or controlling the temperature with an air conditioning device does not always provide an optimal plant growing environment. Furthermore, there is a possibility that the lighting device and the air conditioning device consume more electrical energy than necessary, making it impossible to reduce the environmental load.

Utility Model Registration No. 3161980

SUMMARY OF THE INVENTION An object of the present invention is to provide a plant cultivation system that facilitates the creation of an environment suitable for plant cultivation with optimum energy consumption.

In order to cultivate plants, the plant cultivation system of the present invention comprises a solar cell module constituting an upper portion, a lighting device arranged below the solar cell module, and a side portion arranged to transmit and scatter light. a first sheet, a second sheet arranged inwardly of the first sheet to transmit and scatter light, an air conditioner for adjusting the temperature and humidity of an indoor space of the plant cultivation system, and the first sheet. an opening/closing device for opening and closing an indoor space to the outside by raising or lowering a sheet and a second sheet; a watering device for watering the plants; a storage battery for storing electric power generated by the solar cell module; and means for controlling the supply of power from a battery or power grid to the loads including the lighting device, air conditioning device, switchgear and irrigation device.

According to the present invention, by scattering light with the first sheet and the second sheet, it is easy to make the light in the indoor space uniform and suitable for plant cultivation. It is designed so as not to consume more power than necessary, and has a low environmental impact. That is, the present invention reduces the environmental load and easily creates an optimum growing environment for plants.

It is a figure which shows the external appearance of a plant cultivation system. FIG. 2 is a view of the indoor space of the plant cultivation system viewed from a cross section taken along the line AA in FIG. 1; FIG. 4 is a diagram showing the fixed portion of the two sheets; It is a figure which shows the structure of the electric power system of a plant cultivation system.

A plant cultivation system according to the present application will be described with reference to the drawings. Plants grown in the plant cultivation system are not particularly limited. For example, cultivated plants include vegetables such as lettuce, tomato, watercress and arugula, trees such as olives and coffee. Plants may be planted directly in the ground or grown in plant-growing containers on the ground, floor, or shelves.

The plant cultivation system 10 shown in FIGS. 1 and 2 is composed of a solar cell module 12 on the top (roof) and sheets 14 and 16 on the sides. A plurality of struts 18 are installed on the top and sides for the solar module 12 and sheets 14, 16 to be placed. The lower part of the plant cultivation system 10 may be the ground, concrete may be placed, or a floor may be installed. The plant cultivation system 10 forms an indoor space 20 with an upper portion, side portions and a lower portion. The indoor space 20 is controlled to be the optimum environment for cultivating plants.

The upper part is configured by arranging a plurality of solar cell modules 12 . The plane of the solar cell module 12 is inclined with respect to the horizontal plane while facing south so that the solar cell module 12 is easily irradiated with sunlight. The solar cell module 12 is fixed on the roof plate 22 provided on the upper part. Electric power generated by the solar cell module 12 is used in the plant cultivation system 10 . The sunlight radiated upward does not enter the indoor space 20 and is converted into electrical energy.

A sheet 24 or the like may be placed below the solar cell module 12 . A space is formed between the solar cell module 12 and the sheet 24 to enhance the heat insulating effect of the indoor space 20 .

Some or all of the sides are constituted by sheets 14,16. The sheets 14 and 16 are made of flexible resin.

The sheets include first sheet 14 and second sheet 16 . A first sheet 14 forms the outer portion of the side and a second sheet 16 forms the inner portion of the side (FIG. 2). For example, the first sheet 14 is arranged on the outside of the erected support 18, and the second sheet 16 is arranged on the inside. A space is formed between the first sheet 14 and the second sheet 16 . As long as a space can be formed between the first sheet 14 and the second sheet 16, the width of the space is not limited. The space enhances the heat insulation performance of the indoor space 20 .

It should be noted that although the sides are arranged in at least four directions, the sides formed by the first and second sheets 14, 16 are the sides in at least one direction, and the other sides are made of other sheets or building materials. may be configured. In addition, at least one side portion may be entirely composed of the first and second sheets 14, 16, or may be composed of other sheets or building materials.

The first sheet 14 and the second sheet 16 are made of a material that transmits light. Sunlight can enter the indoor space 20 from the outside of the plant cultivation system 10 through the first sheet 14 and the second sheet 16 .

Fine unevenness is formed on the entire surfaces of the first sheet 14 and the second sheet 16 . The shape of the fine unevenness is irregular, and the fine unevenness allows the first sheet 14 and the second sheet 16 to scatter light. The first sheet 14 and the second sheet 16 scatter the sunlight in an arbitrary direction and enter the indoor space 20 . By scattering the light with the two sheets 14 and 16, the light can easily reach any place in the indoor space 20 uniformly. Light can easily reach even the light-shielded areas on the top. In addition, it is easy to evenly irradiate any plant in the indoor space 20 with light, making it easy to grow the plant evenly.

The first sheet 14 and the second sheet 16 are composed of two sheets. An air layer is formed between the two sheets. Due to the air layer, each of the first sheet 14 and the second sheet 16 has heat insulation performance.

The two sheets constituting each of the first sheet 14 and the second sheet 16 are partially fixed to each other by a method such as adhesion or welding. For example, as shown in FIG. 3, there are multiple fixed portions 26 and one fixed portion 26 is not connected to another fixed portion 26 . Therefore, the air layer between the two sheets is connected as one. Air always enters the entire space between the two sheets from the ends of the first sheet 14 and the second sheet 16.例文帳に追加

The two sheets constituting each of the first sheet 14 and the second sheet 16 are fixed with their positions shifted when they are fixed to each other. For example, one of the two sheets is fixed to the other sheet while being shifted in one direction. That is, the positions of the two sheets facing each other under tension before being fixed are displaced during fixing and are not opposed after being fixed. An air layer is likely to be formed by shifting the facing positions. Even without a complicated structure, it forms an air layer with a simple structure and improves heat insulation performance.

The same sheets as those sheets 14 and 16 may be used for the portions other than the first sheet 14 and the second sheet 16 in the side portions. It scatters light on the entire side and enhances heat insulation performance.

An opening/closing device 28 is provided for opening/closing the indoor space 20 to the outside. The opening and closing device 28 rotates the first pillar 30 attached to each seat 14, 16 and oriented in the horizontal direction, the second pillar 32 fixed to the lower part of the ground or floor and oriented in the vertical direction, and the first pillar 30. A rotary movement device 34 is provided to move along the second column 32 while rotating.

The first sheet 14 or the second sheet 16 is wound or unrolled around the first column 30 by rotating the rotating device 34 around the central axis of the first column 30 . The rotary movement device 34 moves along the second column 32 in synchronization with the rotation, so that the first sheet 14 or the second sheet 16 is rolled up and spread out and lowered. The indoor space 20 is opened to the outside by rolling up the first sheet 14 and the second sheet 16, and the indoor space 20 is blocked from the outside by rolling it down.

A net may be placed between the first sheet 14 and the second sheet 16 . Birds and the like can be prevented from entering the indoor space 20 when the sheets 14 and 16 are rolled up.

The plant cultivation system 10 includes a lighting device 36, an air conditioner 38, a watering device 40, and a CO ₂ generator 41, and the configuration for controlling them is shown in FIG. These devices 36, 38, 40 and 41 are used to prepare an environment for cultivating plants. In addition, the opening/closing device 28 described above is also driven together with the devices 36, 38, 40 and 41 to prepare an environment for cultivating plants.

A lighting device 36 is provided below the solar cell module 12 in the indoor space 20 . The illumination device 36 includes an LED (light emitting diode) and its drive circuit. LEDs use those that emit light at the optimum wavelength for plant growth. For example, white (all wavelengths of visible light), blue and red wavelengths are used as appropriate. The light transmitted through the side and the light of the LED illuminate the plant.

The air conditioner 38 controls the temperature and humidity of the indoor space 20 . A ventilation fan may be provided in addition to the air conditioner 38, or the air conditioner 38 may be provided with a ventilation function.

The irrigation system 40 includes pipes through which water flows, pumps that deliver water to the pipes, and valves that control the flow of water. A small hole is drilled in the pipe, and the water is drained from the small hole. Drained water is fed to plants. The humidity in the indoor space 20 can also be controlled by watering the plants.

The CO ₂ generator 41 controls the CO ₂ concentration in the indoor space 20 . The CO ₂ generator 41 can make CO ₂ into any concentration. The CO ₂ generator 41 is interlocked with the rotary movement device 34, and is cut off from the outside by winding down the first sheet 14 and the second sheet 16 while the CO ₂ generator 41 is operating. CO ₂ is supplied to the closed indoor space 20 to adjust the CO ₂ concentration.

The plant cultivation system 10 comprises a light sensor 42, a temperature sensor 44, a humidity sensor 46 and a _CO2 sensor 48 to manage light, temperature and humidity for growing plants.

A plurality of optical sensors 42 are arranged in the indoor space 20 . The intensity of light is detected by the optical sensor 42, and the light emission of the LED is controlled so that the intensity of light is optimal for the plants. It is also possible to arrange the optical sensor 42 outside the indoor space 20 and predict the power generation amount of the solar cell module 12 based on the amount of light received by the optical sensor 42 .

A temperature sensor 44 measures the air temperature within the indoor space 20 . By measuring the temperature in the indoor space 20, the temperature in the indoor space 20 is optimized. A temperature sensor 44 is also arranged outside the indoor space 20 . By opening and closing the first seat 14 and the second seat 16, it is possible to adjust the temperature without using the air conditioning device 38. For this purpose, the temperature difference between the inside and outside of the indoor space 20 is measured.

Humidity sensor 46 measures the humidity in indoor space 20 . At least one of the air conditioning device 38 and the irrigation device 40 is controlled according to the humidity so that the humidity in the indoor space 20 is optimized. A humidity sensor 46 is also arranged outside the indoor space 20 . By controlling the opening/closing device 28 to open and close the first sheet 14 and the second sheet 16, it is also possible to adjust the humidity without using the air conditioning device 38 and the watering device 40. FIG.

CO ₂ sensor 48 measures the CO ₂ concentration within room space 20 . At least one of the CO ₂ generator 41 and the opening/closing device 40 is controlled according to _the CO 2 concentration, and the CO ₂ concentration in the indoor space 20 is maintained at a concentration suitable for plant cultivation.

The plant cultivation system 10 includes a storage battery 50 that stores electric power. Electric power generated by the solar cell module 12 , electric power transmitted from the transmission system (grid) 52 , or both of them are stored in the storage battery 50 . The stored power is utilized by loads 54 including lighting system 36 , air conditioning system 38 , watering system 40 and CO ₂ generator 41 . In addition, the switchgear 28 is also used as a load 54 for electric power.

A charging circuit 56 is provided to charge the storage battery 50 . The charging circuit 56 charges the power generated by the solar cell module 12 or the power transmitted from the transmission system 52 . Control is performed so that the storage battery 50 is not overcharged.

A power converter 58 is provided for supplying power from the solar module 12 , the storage battery 50 or the power grid 52 to the load 54 . A power converter 58 converts power suitable for the load 54 . The storage battery 50 is controlled so as not to be over-discharged. Although the storage battery 50 and the power conversion device 58 are connected via the charging circuit 56 in FIG. 4, they may be directly connected.

Plant cultivation system 10 comprises means for controlling power supply to load 54 . The loads 54 include the lighting system 36 , the air conditioning system 38 and the watering system 40 . The switchgear 28 is also included in the load 54 and controlled by a control section which will be described later.

The means for controlling power supply includes a clock section 60 , a calendar section 62 , a power calculation section 64 , a detection section 66 and a control section 68 . Each part is configured by hardware, software, or both that operate as described later.

The clock unit 60 is means for transmitting the date and time. The control unit 68 uses the date and time transmitted by the clock unit 60 to perform calculations, etc., which will be described later.

The calendar section 62 is data stored in a storage device, and the stored data is the sunrise and sunset times for each day of the location where the plant cultivation system 10 is installed. Obtaining the remaining time during which the solar cell module 12 can generate power at a certain time on a certain day and the time until the solar cell module 12 starts generating power on the following day from the date and time and the sunrise and sunset times transmitted by the clock unit 60. can be done.

The power calculation unit 64 obtains the remaining time that the solar cell module 12 can generate power as described above and the time until the solar cell module 12 starts generating power the next day, and calculates the amount of power generated by the solar cell module 12 until sunset. Calculate the capacity and the power usage of the load 54 by sunrise.

The amount of power that can be generated by the solar cell module 12 before sunset at a certain time on a certain day can be obtained from the amount of power generated by the solar cell module 12 at that time and the time until sunset. The power consumption of the load 54 until sunrise on the next day can be obtained from the time until sunrise and the usage status of the load 54 after that time. The usage status of the load 54 varies depending on the amount of light, temperature and humidity, and changes with time. A change in the amount of light or the like is predicted to predict the usage status of the lighting device 36, the air conditioner 38, and the watering device 40, and based on the prediction, the power consumption of the load 54 until sunrise is calculated. For the purpose of prediction, the power consumption of the lighting device 36, the air conditioning device 38 and the watering device 40 may be stored in the storage device 70 according to the amount of light, temperature and humidity. The controller 68 may predict changes in light intensity, temperature and humidity from stored data. The control unit 68 may also store the CO ₂ concentration and predict changes in the CO ₂ concentration.

The detection unit 66 is means for detecting the dischargeable amount of the storage battery 50 . The detection unit 66 measures the terminal voltage of the storage battery 50 to determine the dischargeable amount, measures the current value during charge/discharge of the storage battery 50 to determine the dischargeable amount, and adds temperature characteristics and discharge characteristics to the above methods. It is possible to use means for using various methods, such as a method for

The control unit 68 performs charge/discharge of the storage battery 50 and switching between the storage battery 50 and the power transmission system 52 for supplying power to the load 54 based on the calculation result of the power calculation unit 64 and the dischargeable amount of the storage battery 50 by the detection unit 66 . Control. For this control, the control unit 68 controls the charging circuit 56 and the power conversion device 58 . By this switching, power can be supplied to the load 54 as described later.

The control unit 68 controls the storage battery 50 so that it is not charged more than necessary. For example, if the dischargeable amount of the storage battery 50 until sunrise on the next day is greater than the usage of the load 54, charging is not performed until the solar cell module 12 generates power on the next day. That is, charging is not performed using late-night power or the like. If the dischargeable amount of the storage battery 50 is less than the usage amount of the load 54, the necessary amount is charged. If the solar cell module 12 is generating power, the power generated by the solar cell module 12 is used for charging, and if the solar cell module 12 is not generating power, the power from the transmission system 52 is used for charging. If the dischargeable amount of the storage battery 50 becomes greater than the usage amount of the load 54 during charging, the charging stops at that point.

That is, the present application uses the power consumption of the load 54 and the dischargeable amount of the storage battery 50 to be used until sunrise on the next day, and controls the battery so as not to charge more than necessary. Even with surplus power late at night, charging the battery more than necessary imposes an unnecessarily large burden on the environment. It is sufficient to secure enough electric power until the solar cell module 12 generates power on the next day, and the environmental load is reduced as much as possible.

As described above, the sunlight scattered by the first sheet 14 and the second sheet 16 enters the indoor space 20 and irradiates the plants. Light entering from the sides is scattered and homogeneous at any location within the interior space 20 . The light of the illumination device 36 is added there to create the light necessary for the plants to grow. Plants can be irradiated with light from multiple directions, and the growth of plants can be promoted.

The value of the light sensor 42 is used to add the light of the lighting device 36 to the sunlight. A light sensor 42 measures the intensity of light within the interior space 20 . The control unit 68 obtains the intensity of the insufficient light and drives the illumination device 36 . Since LEDs are used in the illumination device 36, by controlling the driving circuit thereof, the current flowing through the LEDs is controlled, and the light emission intensity of the LEDs is controlled. For example, the LED is controlled by making the current flowing through the LED a pulse current and controlling the pulse width of the pulse current. The light emission of the LED is controlled so that the light received by the optical sensor 42 has a constant intensity. Since the intensity of sunlight cannot be adjusted, the intensity of light in the indoor space 20 can be made constant by controlling the current flowing through the LEDs.

Plant growth saturates when the light intensity exceeds a certain level, so the light intensity of the LED can be adjusted to the optimum light for plants. By not irradiating light with a certain intensity or more, it is possible to prevent the plants from scorching the leaves. Since it mainly uses sunlight incident from the side, it does not require more electrical energy than necessary and has a low environmental impact.

A temperature sensor 44 is arranged in the indoor space 20 and its periphery to measure the temperature. The measured temperature value is input to the controller 68 . The controller 68 drives the air conditioner 38 and the opening/closing device 28 according to the temperature. For example, when the temperature of the indoor space 20 becomes higher than a predetermined value and the outside air temperature is lower than the predetermined value, the sheets 14 and 16 are rolled up to take the outside air into the room. When the temperature of the indoor space 20 and the outside air temperature are higher than predetermined values, the room temperature is lowered by the air conditioning device 38 while keeping the sheets 14 and 16 lowered. When the room temperature is lower than the predetermined value and the outside air temperature is higher than the predetermined value, the sheets 14 and 16 are rolled up to take the outside air into the room to raise the room temperature. When the room temperature is lower than the predetermined value and the outside air temperature is also lower than the predetermined value, the temperature is raised by the air conditioning device 38 with the seats 14 and 16 lowered.

Since the air conditioner 28 does not constantly adjust the room temperature, it does not consume power more than necessary to achieve the optimal temperature for the plants.

Furthermore, a humidity sensor 46 is also arranged in the indoor space 20 and its periphery to measure the humidity. The measured humidity value is input to the controller 68 . The control unit 68 drives the air conditioning device 38, the sprinkling device 40 and the opening/closing device 28 according to the humidity. When the humidity in the indoor space 20 becomes higher than a predetermined value, the sheets 14 and 16 are rolled up to take the outside air into the indoor space 20 if the outside humidity is lower than the predetermined value. When the humidity of the indoor space 20 and the humidity of the outside are higher than predetermined values, the humidity is lowered by the air conditioner 38 while keeping the sheets 14 and 16 lowered. When the humidity in the indoor space 20 is lower than a predetermined value and the humidity in the outside is higher than the predetermined value, the sheets 14 and 16 are rolled up to take the outside air into the indoor space 20 to increase the humidity. When the humidity in the indoor space 20 is lower than a predetermined value and the humidity in the outside is also low, the water sprinkling device 40 sprinkles water while keeping the sheets 14 and 16 down to raise the humidity.

The temperature and humidity of the indoor space 20 are controlled by the air conditioning system 38, the watering system 40 and the switchgear 28. Either temperature or humidity may be preferentially controlled. By moving the sheets 14 and 16 up and down with the opening/closing device 28, the light intensity to the indoor space 20 is changed. Temperature, humidity, and light intensity may be controlled by prioritizing each.

The temperature and humidity can be adjusted by opening and closing the indoor space 20 by raising and lowering the sheets 14 and 16 instead of constantly driving the air conditioning device 38 and the watering device 40 . It becomes possible to reduce the electric power consumed by the air conditioning device 38 and the watering device 40 .

A CO ₂ sensor 48 is also arranged in the indoor space 20 and its periphery to measure the CO ₂ concentration. The measured CO ₂ concentration value is input to the controller 68 . The control unit 68 drives the CO ₂ generator 41 and the switching device 28 according to the CO ₂ concentration. When the CO ₂ concentration in the indoor space 20 becomes higher than a predetermined value, the sheets 14 and 16 are rolled up to take outside air into the indoor space 20 if the CO ₂ concentration outside is lower than the predetermined value. When the CO ₂ concentration in the indoor space 20 and the CO ₂ concentration outside are higher than predetermined values, the CO ₂ concentration is lowered by photosynthesis of plants while the sheets 14 and 16 are kept lowered. When the CO ₂ concentration in the indoor space 20 is lower than the predetermined value and the CO ₂ concentration outside is higher than the predetermined value, the sheets 14 and 16 are rolled up to take outside air into the indoor space 20 to increase the CO ₂ concentration. When the CO ₂ concentration in the indoor space 20 is lower than the predetermined _value and the CO ₂ concentration outside is also low, the CO 2 concentration is increased by causing the CO ₂ generator 41 to generate CO ₂ while keeping the sheets 14 and 16 down. .

Although temperature, humidity and light intensity are prioritized and controlled as described above, _CO2 concentration may also be included among those priorities.

As described above, according to the present invention, sunlight is diffused to uniformize and soften the light irradiating the plants, thereby facilitating the creation of optimal light for the plants. Moreover, it is configured so as not to consume power more than necessary, and the environmental load is small. That is, the present invention reduces the environmental load and easily creates an optimum growing environment for plants.

Although one embodiment of the invention has been described, the invention is not limited to the above embodiment. For example, both the first seat 14 and the second seat 16 may not be opened and closed together, but only one of them may be opened and closed. To adjust the temperature in a room by reducing the heat insulating effect. It is possible to gradually change the temperature in the room rather than to change it abruptly, thereby avoiding adverse effects on the plants due to sudden temperature changes.

Alternatively, after one of the sheets 14 and 16 is rolled up, the other sheet 14 and 16 may be rolled up after a predetermined period of time has elapsed to open up the indoor space 20 . The heat insulating effect is reduced, and the indoor space 20 is opened when the difference between the temperature inside the room 20 and the temperature outside becomes smaller than a constant temperature. Conversely, after one of the seats 14 and 16 is lowered, the other seat 14 and 16 may be lowered after a predetermined time has elapsed to close the indoor space 20 . The heat insulating effect is reduced, and the indoor space 20 is closed when the temperature difference between the indoor space 20 and the outside temperature exceeds a constant temperature. In either case, the seats 14, 16 are opened and closed while avoiding sudden temperature changes in the indoor space 20.

LEDs are not limited to being placed above plants. The LEDs are arranged so that the plants can be irradiated with light from various directions as needed. The first sheet 14 and the second sheet 16 scatter the sunlight to make it uniform, and the light emitted by the illumination device 36 may also be emitted in various directions to make the light uniform.

A plurality of LEDs may be provided, and the light emission intensity of each LED may be controlled to make the light in the indoor space 20 uniform. Moreover, as described above, the light in the indoor space 20 is made uniform by the first sheet 14 and the second sheet 16, and it is possible not to control the LEDs individually.

A sheet having a higher reflectance than light transmittance may be used for the sheet forming the north side portion. When the scattered light tries to pass through the north side, it is reflected back into the interior space 20 . The light incident on the indoor space 20 can be effectively used.

The control unit 68 may temporarily lower or stop power supply to the load 54 . For example, if the dischargeable amount of the storage battery 50 is less than the usage amount of the load 54, as described above, the storage battery 50 is charged to the required amount. or stop. The amount of power used by the load 54 is reduced, and the amount of charge in the storage battery 50 is reduced. As a specific method of reducing the amount of use of the load 54 or stopping it, for example, if it is nighttime, the illumination device 36 is stopped, or the current flowing through the LED is controlled to reduce the light intensity. It is also possible to adjust the temperature of the indoor space 20 by opening/closing one or both of the two sheets 14 and 16 and to stop the air conditioner 38 .

Also, in order to temporarily lower or stop the power supply to the load 54, changes in the light intensity, temperature and humidity are predicted from changes in the sensors 42, 44, 46 and 48, and the controller 68 A load 54 may be controlled. For example, even if the temperature in the indoor space 20 is higher than a predetermined value at a certain time, if it can be predicted that the temperature will drop, the air conditioner 38 and the opening/closing device 28 are not controlled. Conversely, even if the air temperature is lower than the predetermined value, if it can be predicted that it will rise, the control of the air conditioner 38 and the opening/closing device 28 is not performed. The same is true for humidity. That is, even if the temperature and humidity in the indoor space 20 are different from the predetermined values, if it can be predicted that they will change toward the predetermined values within a certain period of time, the control unit 68 will control the air conditioner 38 and the switchgear 28. reduce power consumption. As for the prediction method, the controller 68 may predict changes in the data stored in the storage device 70 as described above.

It may be controlled so that the sheets 14 and 16 are not raised when the CO ₂ concentration in the indoor space 20 becomes higher than a predetermined value. For example, even if the lighting device 36 is turned off at night and the CO ₂ concentration increases due to respiration of plants, if the time until sunrise is short, the CO ₂ concentration in the indoor space 20 can be decreased by photosynthesis of plants after sunrise. good.

In addition, the CO ₂ generator 41 is controlled in accordance with the control of the opening/closing device 28 . Even if the concentration of _CO2 is low, the _CO2 generator 41 is not activated if the sheets 14, 16 are raised to adjust the temperature or humidity to allow outside air to enter and increase the _CO2 concentration. Further, when it is expected that the seats 14 and 16 remain closed, the CO ₂ generator 41 is operated when the CO ₂ concentration decreases. By operating the CO ₂ generator 41 in accordance with the control of the switchgear 28, the operating time of the CO ₂ generator 41 can be reduced, which facilitates power saving.

The control unit 68 may be connected to a communication network such as the Internet. Control information for each load 54 by the control unit 68 is transmitted to a device such as a server. Accumulate control information in a server, etc., and use it as reference information. Moreover, the control information may be transmitted from the control unit 68 to the mobile device owned by the plant cultivation system 10 . The owner of the plant cultivation system 10 can remotely grasp the control status of the controller.

In addition, the present invention can be implemented with various improvements, modifications, and changes based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

10: Plant cultivation system 12: Solar cell module 14, 16: Seat 20: Indoor space 26: Fixed part 28: Switching device 36: Lighting device 38: Air conditioning device 40: Watering device 41: _CO2 generator 42: Light sensor 44: Temperature sensor 46: Humidity sensor 48: _CO2 sensor 50: Storage battery 52: Power system (grid)
54: Load 56: Charging circuit 58: Power conversion device 60: Clock unit 62: Calendar unit 64: Power calculation unit 66: Detection unit 68: Control unit

Claims (5)

A plant cultivation system for cultivating plants,
a solar cell module forming the upper part;
a lighting device disposed below the solar cell module;
a first sheet disposed laterally for transmitting and scattering light;
a second sheet disposed inwardly of the first sheet for transmitting and scattering light;
an air conditioner that adjusts the temperature and humidity of the indoor space of the plant cultivation system;
an opening/closing device that opens and closes the indoor space to the outside by raising or lowering the first seat and the second seat;
a watering device for watering the plants;
a storage battery for storing electric power generated by the solar cell module;
means for controlling the supply of power from the battery or grid to loads including the lighting, air conditioning and irrigation systems;
A plant cultivation system with The means for controlling
a clock unit that transmits the date and time;
a calendar unit that stores the times of sunrise and sunset;
a power calculation unit that calculates the amount of power that can be generated by the solar cell module until sunset and the power consumption of the load until sunrise using the date and time transmitted by the clock unit and the times of sunrise and sunset stored in the calendar unit;
a detection unit that detects the dischargeable amount of the storage battery;
a control unit that controls charging and discharging of a storage battery and switching between the storage battery and a transmission system for supplying power to the load, based on the calculation result of the power calculation unit and the dischargeable amount detected by the detection unit;
The plant cultivation system of claim 1, comprising: When the power consumption calculated by the power calculation unit is less than the amount of power that can be generated, the control unit controls only the insufficient power consumption from the transmission system to power supply to the load, storage in the storage battery, or both. 2 plant cultivation system. 4. The plant cultivation system according to any one of claims 1 to 3, wherein at least one of the first sheet and the second sheet is composed of two sheets, and parts of the two sheets are fixed to each other. 5. The plant cultivation system according to claim 4, wherein the two sheets are fixed so that the positions facing each other before being fixed to each other are shifted.

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