Method for integrated control of non-stirring hydroponic nutrient solution supply system

Abstract

The present invention provides a method for integrated control of a non-stirring hydroponic nutrient solution supply system comprising: a raw water tank; a nutrient solution tank and a control tank into which raw water is introduced from the raw water tank so as to generate and store a nutrient solution; and a mixing tank into which the raw water is introduced from the raw water tank, and into which the nutrient solution is further introduced from the nutrient solution tank and the control tank so as to be mixed and stored, wherein the nutrient solution is supplied from the mixing tank to a cultivation site (GH) of a hydroponic facility by means of a supply pump (401), a nutrient solution recirculation line and a pH sensor are provided in the mixing tank and valves (V1, V2) are provided in the nutrient solution recirculation line, a training model is generated using, as a training data set, a mixing tank pH checked by the pH sensor, the hourly change of the mixing tank pH checked by the pH sensor, and the recirculation power of the supply pump (401), the mixing tank pH and the hourly change of the mixing tank pH are input into the generated training model so as to check the recirculation power of the supply pump (401), the supply pump (401) is controlled according thereto, and the valves (V1, V2) are controlled to be opened if the recirculation power of the supply pump (401) exceeds zero.

Description

Integrated control method for a non-stirred hydroponic nutrient solution supply system

[0001] The present invention is a convergence technology of water treatment, agriculture, and IT.

[0002] The quality of the nutrient solution used in hydroponics significantly impacts crop yields. To improve and maintain nutrient solution quality, various methods are used in hydroponics to create, manage, and supply the solution. Most systems utilize a mixing tank just before dispensing it to the cultivation area. By monitoring and managing the pH, EC (electrical conductivity), water level, and temperature of the nutrient solution within this mixing tank, information about the nutrient solution supplied to the cultivation area can be obtained and quality maintained.

[0003] For this purpose, the mixing tank of the hydroponic nutrient solution supply system is equipped with various sensors such as a pH sensor, EC sensor, water level sensor, and temperature sensor. The pH used in hydroponics is generally around 5.5, and if the pH of the nutrient solution in the mixing tank measured by the pH sensor is lower than 5.5, a chemical that can lower the pH is added to the nutrient solution to be supplied, and if it is higher than 5.5, more raw water is supplied to adjust the pH. For this purpose, an inverter pump is installed in the pipe connecting the nutrient solution supply unit where the chemicals are stored and the raw water tank, respectively, and the mixing tank, and it is set to be controlled manually or automatically depending on the pH sensor.

[0004] Additionally, the total amount can be adjusted simultaneously with the pH. For example, if the mixing tank water level sensor drops, the inverter pump operates to introduce chemicals or raw water based on the pH sensing value. If the pH is at an appropriate level, the nutrient solution or nutrient solution and raw water are supplied to the mixing tank accordingly.

[0005] In this way, EC, temperature, etc. are also managed.

[0006] Meanwhile, independent of this process, a mixer is installed within the mixing tank and operates continuously 24 hours a day. Since the nutrient solution within the mixing tank is ultimately a mixture of raw water and chemicals, this is to prevent chemical precipitation and maintain pH, thereby managing quality.

[0007] Most mixing tanks that collect and supply nutrient solutions are large-capacity, and depending on the total capacity of the mixing tank, high-power agitators, for example, 11 kW or more, are often used. However, if a high-power agitator operates continuously for 24 hours, sedimentation is prevented, but the pH fluctuations and hourly changes within the mixing tank can be large. Large pH fluctuations and hourly changes can lead to the supply of unhealthy nutrient solutions to crops depending on the timing of the nutrient solution supply. This can negatively impact crop yields.

[0008] Furthermore, if the pH fluctuation range and hourly change are large, the nutrient solution supply unit and the raw water tank inverter pump drive signals sent to control the pH may not be delivered at the appropriate time. For example, if the pH is rapidly changing from 5.4 to 5.8, raw water or chemicals may be supplied depending on the sensor's sensing timing, making it more difficult to control the nutrient solution to the desired pH.

[0009] Moreover, the RPM of the agitator in the currently operating hydroponic nutrient solution mixing tank is set considerably high. In the field, agitators typically operate 24 hours a day at a maximum speed of 180 RPM. This is designed to prevent sedimentation, but unnecessarily fast agitator rotation further increases pH fluctuations.

[0010] Additionally, more energy is consumed for unnecessary rotation, which places a great burden on small farms.

[0011] In this way, since the agitator of the conventional mixing tank for supplying hydroponic nutrient solution is set to operate continuously, problems arise not only in crop production but also in maintaining appropriate pH and energy consumption.

[0012]

[0013] (Patent Document 1) Korean Patent No. 2078056

[0014] (Patent Document 2) Korean Patent No. 2079294

[0015] (Patent Document 3) Korean Patent No. 2281447

[0016] (Patent Document 4) Korean Patent No. 2367100

[0017] (Patent Document 5) Korean Patent No. 2541371

[0018] (Patent Document 6) Korean Patent No. 2544547

[0019] (Patent Document 7) Korean Patent Publication No. 2014-0071774

[0020] (Patent Document 8) Korean Patent Publication No. 2018-0018018

[0021] (Patent Document 9) Korean Patent Publication No. 2023-0016106

[0022] (Patent Document 10) Korean Utility Model Registration No. 20-0248010

[0023] The present invention has been devised to solve the above problems.

[0024] The aim is to solve the problem of excessive pH fluctuation, difficulty in maintenance, and excessive energy consumption due to excessive operation of the agitator in the mixing tank.

[0025] One embodiment of the present invention for solving the above-mentioned problem comprises: a raw water tank; a nutrient solution tank and a control tank in which raw water flows in from the raw water tank to produce and store a nutrient solution; And a mixing tank in which raw water flows in from the raw water tank, and nutrient solutions are further introduced from the nutrient solution tank and the control tank, mixed, and stored, and a method for integrating control of a hydroponic nutrient solution supply system in which nutrient solutions are supplied from the mixing tank to a cultivation area (GH) of a hydroponic cultivation facility by a supply pump (401), wherein a nutrient solution recirculation line and a pH sensor are provided in the mixing tank, and valves (V1, V2) are provided in the nutrient solution recirculation line, and a learning model is created by using the mixing tank pH confirmed by the pH sensor, the hourly change in the mixing tank pH confirmed by the pH sensor, and the recirculation power of the supply pump (401) as a learning data set, and the recirculation power of the supply pump (401) is confirmed by inputting the mixing tank pH and the hourly change in the mixing tank pH into the created learning model, and the supply pump (401) is controlled accordingly, and the recirculation power of the supply pump (401) is set to 0. An integrated control method for a non-stirring hydroponic nutrient solution supply system is provided, which controls the opening of the valves (V1, V2) when the amount exceeds the amount.

[0026] In addition, it is preferable that the mixing tank is further equipped with a mixing tank EC (electrical conductivity) sensor, and the learning data set further includes the mixing tank EC confirmed by the EC sensor and the hourly change in the mixing tank EC confirmed by the EC sensor, and the mixing tank EC and the hourly change in the mixing tank EC are further input into the generated learning model to confirm the recirculation power of the supply pump (401).

[0027] In addition, it is preferable that the learning model be a model that learns the mixing tank pH confirmed by the pH sensor, the hourly change in the mixing tank pH confirmed by the pH sensor, the mixing tank EC confirmed by the EC sensor, the hourly change in the mixing tank EC confirmed by the EC sensor, and the recirculation power of the supply pump (401), and outputs the recirculation power of the supply pump (401) so that the mixing tank pH reaches a predetermined pH while minimizing the hourly change in the mixing tank pH.

[0028] In addition, it is preferable that the mixing tank is further equipped with a CO2 tank, a water level sensor, and a temperature sensor, and that the learning data set further includes a mixing tank water level confirmed by the water level sensor and a mixing tank temperature confirmed by the temperature sensor.

[0029] In addition, it is preferable to further confirm the power of the nutrient solution dosing pump and the power of the regulating pump together with the recirculation power of the supply pump (401) by further inputting the mixing tank water level and the mixing tank temperature into the generated learning model, by which the nutrient solution tank introduces the nutrient solution into the mixing tank by means of a nutrient solution dosing pump and the regulating tank introduce the nutrient solution into the mixing tank by means of a regulating pump.

[0030] In addition, it is preferable that the cultivation area (GH) is equipped with a humidity sensor and a moisture content sensor, and that the learning data set further includes the cultivation area humidity confirmed by the humidity sensor and the cultivation area moisture content confirmed by the moisture content sensor.

[0031] In addition, it is preferable to further provide a CO2 tank in the above cultivation area (GH) and further input the cultivation area humidity and cultivation area moisture content into the generated learning model, thereby further confirming the CO2 emission amount of the CO2 tank together with the recirculation power of the supply pump (401), the power of the nutrient solution dosing pump, and the power of the control pump.

[0032] In addition, it is desirable that the amount of change in the pH of the mixing tank is reduced compared to when the mixing tank agitator is always operated within the mixing tank by the integrated control method.

[0033] In addition, the nutrient solution tanks are two or more, and each nutrient solution tank is provided with the nutrient solution dosing pump, and it is preferable that the maximum output of the nutrient solution dosing pump is greater than the maximum output of the regulating pump.

[0034] In addition, it is preferable that each nutrient tank is equipped with a nutrient tank stirrer, the control tank is equipped with a control tank stirrer, and the maximum output of the nutrient tank stirrer is greater than the maximum output of the control tank stirrer.

[0035]

[0036] Another embodiment of the present invention for solving the above-described problem provides a computer program stored in a computer-readable recording medium so that the above-described methods are performed.

[0037] According to the present invention, a hydroponic nutrient solution supply system is provided that prevents sedimentation without the need for a mixer in the mixing tank. Specifically, the amount of recirculation can be automatically controlled by artificial intelligence using various sensing values ​​detected in the mixing tank. Therefore, unlike conventional mixers that operate continuously 24 hours a day, this system fundamentally prevents problems such as large RPM fluctuations or hourly changes in nutrient solution. This can lead to increased crop production.

[0038] It has an energy-saving effect because it does not utilize the stirrer itself.

[0039] In another embodiment of the present invention, the amount of nutrient solution supplied from the nutrient solution tank and the control tank can be simultaneously controlled, and the CO2 emissions from the CO2 tank in the cultivation area can also be automatically controlled. Accordingly, most devices in the hydroponic nutrient solution supply system can be integrated and automatically controlled, allowing for more precise control of pH fluctuations and hourly changes.

[0040] Figure 1 illustrates a non-stirring hydroponic nutrient solution supply system according to the present invention.

[0041] Figures 2 and 3 are drawings for explaining an integrated control method according to the present invention.

[0042]

[0043] 1. Description of the non-stirred hydroponic nutrient solution supply system

[0044] Referring to FIG. 1, a non-stirring hydroponic nutrient solution supply system to which the method according to the present invention is applied is described.

[0045] The hydroponic nutrient solution supply system includes a source water tank (110, 120), a nutrient solution tank (210, 220, 230, 240, 250), a control tank (300), and a mixing tank (400).

[0046] The raw water tanks (110, 120) store raw water supplied to the nutrient solution tanks (210, 220, 230, 240, 250), the control tank (300), and the mixing tank. Raw water is supplied from one raw water tank (110) to the mixing tank (400), and raw water is supplied from another raw water tank (120) to the nutrient solution tanks (210, 220, 230, 240, 250) and the control tank (300) (indicated as "A" in the drawing). In Fig. 1, the two nutrient solution tanks are divided as such, but the number is not limited. For example, raw water may be supplied from one raw water tank to all of the mixing tank, the nutrient solution tank, and the control tank, or three or more raw water tanks may be provided to supply raw water to each of them.

[0047] A raw water feed pump (111) is provided inside the raw water tank (110). When the raw water feed pump (111) operates, raw water is supplied to the mixing tank (400). A filter (115) may be located in the corresponding flow path. The filter (115) may be, for example, a cartridge filter.

[0048] Likewise, a raw water feed pump (121) is provided inside the raw water tank (120). When the raw water feed pump (121) operates, raw water is supplied to the nutrient solution tanks (210, 220, 230, 240, 250) and the control tank (300).

[0049] Each raw water tank (110, 120) can be connected to groundwater, etc. to directly receive raw water, and raw water overflowing from each raw water tank (110, 120) can be configured to flow underground.

[0050] Each raw water tank (110, 120) is equipped with, for example, a diameter of 5.35 m and a height of 3.5 m and can store 60.7 m3 of raw water, but is not limited thereto.

[0051]

[0052] Nutricium tanks (210, 220, 230, 240, 250) are provided in multiple numbers. Five are shown in the drawing, but the number is not limited to this.

[0053] Each nutrient solution tank (210, 220, 230, 240, 250) is supplied with raw water from the raw water tank (120) while a separate chemical for producing the nutrient solution is supplied (not shown), thereby producing and storing a nutrient solution suitable for hydroponic cultivation. To this end, an even amount of raw water is introduced into each nutrient solution tank (210, 220, 230, 240, 250).

[0054] The chemicals used to create the nutrient solution are not limited and may vary depending on the crop being grown. Accordingly, the desired pH value of the nutrient solution may vary. Below, a pH of 5.5 is described as desirable, but this is not a limitation.

[0055] Each nutrient solution tank (210, 220, 230, 240, 250) is equipped with a nutrient solution tank agitator (219, 229, 239, 249, 259) to continuously agitate the introduced chemicals and raw water. These may be, for example, paddle-type agitators with 180 RPM and 1.5 KW, but are not limited thereto.

[0056] In addition, each nutrient solution tank (210, 220, 230, 240, 250) is equipped with a water level sensor (LS) and a water level gauge (LG). Each nutrient solution tank (210, 220, 230, 240, 250) independently checks the water level of the nutrient solution by the water level sensor, and when it is confirmed that the nutrient solution is stored below a certain amount, the valve (PV) opens and raw water flows in from the raw water tank (120). In addition, the current water level is visually confirmed by the water level gauge (LG).

[0057] In addition, each nutrient solution tank (210, 220, 230, 240, 250) is equipped with a nutrient solution dosing pump (211, 221, 231, 241, 251) for supplying the nutrient solution to the mixing tank (400). The nutrient solution dosing pump (211, 221, 231, 241, 251) can be finely controlled by an inverter motor. The nutrient solution dosing pump (211, 221, 231, 241, 251) can be, for example, 8.8 L / min X 30 mH, 0.01 KW, but is not limited thereto.

[0058] In this way, each nutrient solution tank (210, 220, 230, 240, 250) constantly stores a certain amount of nutrient solution. However, the pH and EC of the nutrient solution are not precisely adjusted, which is done by the control tank (300) and the mixing tank (400).

[0059]

[0060] The control tank (300) generates and stores nutrient solution by supplying raw water from the source water tank (120) in a state where separate chemicals are supplied (not shown) similar to the nutrient solution tanks (210, 220, 230, 240, 250), and unlike the nutrient solution tanks (210, 220, 230, 240, 250), it performs the function of finely adjusting the total amount of nutrient solution, pH, EC, etc. in the mixing tank (400), which is the final form of nutrient solution supplied to the cultivation area (GH).

[0061] Similar to the nutrient solution tanks (210, 220, 230, 240, 250), the control tank (300) is also provided with a control tank pump (301) and a control tank agitator (309). However, after a large amount of nutrient solution is supplied from the nutrient solution tanks (210, 220, 230, 240, 250) to the mixing tank (400), the amount of nutrient solution from the control tank (300) is precisely controlled and supplied, thereby controlling the amount of nutrient solution in the mixing tank (400), pH, EC, etc., and therefore, the control tank pump (301) and the control tank agitator (309) should be capable of more precise control. Therefore, it is preferable to use a device with a small capacity and precise control rather than a large-capacity device. In other words, it is preferable that the control pump (301) has a maximum output lower than that of the nutrient solution dosing pumps (211, 221, 231, 241, 251), and it is also preferable that the control tank agitator (309) has a maximum output lower than that of the nutrient solution agitators (219, 229, 239, 249, 259). For example, the control tank pump (301) may be 0.1 L / min X 30 mH, 0.01 KW, and the control tank agitator (309) may be a paddle-type agitator with 30 RPM and 1.5 KW, but is not limited thereto.

[0062]

[0063] The mixing tank (400) is the final tank that receives and stores nutrient solutions from the nutrient solution tanks (210, 220, 230, 240, 250) and the control tank (300), and, when necessary, transfers a certain amount to the cultivation area (GH) and discharges it through the cultivation area discharge unit (510, 520, 530, 540). For this purpose, a valve (V0), a supply pump (401), and a filter unit (415) are provided at the rear end thereof. In the drawing, the nutrient solution is supplied by branching into four, but this is not limited thereto.

[0064] The nutrient solution in the mixing tank (400) is the final nutrient solution supplied to the cultivation area (GH), so the pH, EC, temperature, etc. of the nutrient solution must be precisely adjusted. After a certain amount of nutrient solution is supplied from the nutrient solution tanks (210, 220, 230, 240, 250), the pH, EC, temperature, etc. of the nutrient solution in the mixing tank (400) are controlled by adjusting the nutrient solution supplied from the control tank (300).

[0065] For this purpose, the mixing tank (400) is equipped with a pH sensor (pH), an EC sensor (EC), a water level sensor (LS), a temperature sensor (Temp), etc. In addition, a water level gauge (LG) is additionally equipped to enable visual confirmation by the operator.

[0066] In the present invention, a mixing tank (400) is not equipped with a mixing tank agitator. A recirculation path is provided to prevent sedimentation of the mixing tank agitator. That is, sedimentation is prevented by recirculating the nutrient solution within the mixing tank (400) at appropriate times and in appropriate amounts. The timing and amount of recirculation are determined by an artificial intelligence learning model, as described below.

[0067] Recirculation is performed according to the nutrient solution recirculation path and is possible by controlling the aforementioned supply pump (401) and two valves (V1, V2). When the valves (V1, V2) are opened and the supply pump (401) operates at the time of recirculation, the nutrient solution is recirculated. That is, when the supply pump (401) operates, the nutrient solution may be supplied to the cultivation area (GH) or may be recirculated depending on the operation of the valves (V0, V1, V2). The power of the supply pump (401) during nutrient solution recirculation is referred to as "recirculation power."

[0068] When the nutrient solution is supplied into the mixing tank (400) through recirculation, turbulence is formed and some precipitated or insufficiently dissolved chemicals are dissolved, thereby adjusting the pH, EC, temperature, etc.

[0069] However, in this case, since the range of pH control is not large, if a larger pH value is required, the pH can be changed by controlling the control tank (300), or the pH can be greatly changed simultaneously with nutrient solution recirculation by using a chemical storage tank (not shown) for pH control separately provided in the recirculation valve.

[0070] As described in the prior art, conventional mixing tank agitators are large-capacity, over 11 kW, and operate 24 / 7. They rotate at maximum speed to prevent sedimentation, which leads to significant pH fluctuations and hourly changes, adversely affecting crop yields.

[0071] The present invention prevents sedimentation without employing a mixing tank agitator. Furthermore, by utilizing an artificial intelligence-based learning model, the control unit (100) automatically and precisely controls the amount of recirculated nutrient solution. This will be described later.

[0072]

[0073] The grow site (GH) can be any hydroponic facility.

[0074] The GH (Growth Field) is equipped with multiple growing media, along with humidity and moisture sensors. The humidity sensor is a probe inserted into the growing media of the GH. Hereinafter, "growing field humidity" refers to the moisture content of the growing media. The growing field moisture sensor measures the moisture content of the air within the GH facilities.

[0075]

[0076] 2. Description of the integrated control method

[0077] The integrated control method according to the present invention is described with reference to FIGS. 2 and 3.

[0078] The control unit (100) according to the present invention constructs a learning model using learning data and then performs integrated control using the learning model.

[0079] The control unit (100) checks the pH and EC of the nutrient solution stored in the mixing tank (400) through the pH sensor and EC sensor of the mixing tank (400). In another embodiment, the temperature and water level are further checked through the temperature sensor and water level sensor of the mixing tank (400). In yet another embodiment, the humidity and moisture content are further checked through the humidity sensor and moisture content sensor of the cultivation area (GH).

[0080] Additionally, the recirculation power of the control unit (100) supply pump (401) is checked. In another embodiment, the power of the regulating pump (301) and the nutrient solution dosing pumps (211, 221, 231, 241, 251) is checked. In another embodiment, the CO2 emission of the CO2 tank of the cultivation area (GH) is further checked.

[0081] The control unit (100) uses this to set learning data.

[0082] Specifically, the pH of the nutrient solution in the mixing tank (400) (hereinafter, mixing tank pH) and the pH hourly change (hereinafter, mixing tank pH change) and the recirculation power of the supply pump (401) are set as a learning data set and secured in large numbers. In order to secure learning data, it is preferable to secure data by variously changing the recirculation power of the supply pump (401). In any situation, as the recirculation power of the supply pump (401) changes, the recirculated nutrient solution changes, and thus the pH and the pH hourly change that are causally related to each other change.

[0083] After acquiring learning data, the input values ​​are set as the mixing tank pH and the hourly change in the mixing tank pH, and the output value is set as the recirculation power of the supply pump (401). At this time, the hourly change in the mixing tank pH is minimized, while the output value is calculated so that the mixing tank pH approaches a desirable value, i.e., 5.5. Through iterative learning, when a specific mixing tank pH and hourly change in the mixing tank pH are input, a learning model is created that outputs the recirculation power of the supply pump (401) that changes so that the mixing tank pH reaches 5.5 while minimizing the hourly change in the mixing tank pH.

[0084] After the learning model is generated, it is applied to the hydroponic nutrient solution supply system. The control unit (100) senses the mixing tank pH and the hourly change in the mixing tank pH in real time and applies the sensing result to the learning model, and accordingly, the appropriate recirculation power of the supply pump (401) is output. The supply pump (401) operates according to the output value. When the supply pump (401) operates for recirculation, that is, when the recirculation power of the supply pump (401) exceeds 0, the valves (V0, V1, V2) operate accordingly. The valve (V0) will be closed and the valves (V1, V2) of the recirculation line will be opened. In some cases, chemicals, etc. may be additionally supplied to the recirculation line or the control tank (300) may operate simultaneously.

[0085] As recirculation takes place, the mixing tank pH and the hourly change in the mixing tank pH begin to change in real time. After a certain period of time (e.g., 1 minute), the changed mixing tank pH and the hourly change in the mixing tank pH are input back into the learning model of the control unit (100), thereby re-outputting the recirculation power of the new supply pump (401). Recirculation is performed by the supply pump (401) based on the output value.

[0086] In this manner, the recirculation power of the supply pump (401) is actively and continuously varied, and recirculation may or may not occur, and even if it does occur, the amount of nutrient solution recirculated varies. This makes it possible to maintain the pH at 5.5 while minimizing the hourly pH change.

[0087]

[0088] In one embodiment of the present invention, the EC (hereinafter, mixing tank EC) and the EC hourly change (hereinafter, mixing tank EC hourly change) of the nutrient solution in the mixing tank (400) can be further utilized as a learning data set. In this case, it is more preferable to minimize not only the hourly change in pH of the mixing tank but also the hourly change in EC of the mixing tank while allowing the pH of the nutrient solution in the mixing tank (400) to reach a desired value.

[0089]

[0090] In another embodiment of the present invention, the temperature and water level detected through the temperature sensor and water level sensor of the mixing tank (400) and the power of the nutrient solution dosing pump (211, 221, 231, 241, 251) and the power of the control pump (301) can be further set as learning data. This is because the temperature and water level of the nutrient solution are related to the amount of the nutrient solution flowing in from the nutrient solution tank (210, 220, 230, 240, 250) and the control tank (300), and at the same time, they also affect the pH and EC of the mixing tank (400). Through this embodiment, there is an effect in which the inflow amount of the nutrient solution tank (210, 220, 230, 240, 250) and the control tank (300) is automatically controlled.

[0091]

[0092] In another embodiment of the present invention, the humidity and moisture content of the cultivation field (GH) and the CO2 emissions from the CO2 tank of the cultivation field (GH) can be further set as learning data. This is because the humidity and moisture content of the cultivation field (GH) are related to the CO2 emissions from the CO2 tank, and are also affected by the pH and EC of the nutrient solution. This embodiment has the effect of automatically controlling the CO2 tank of the cultivation field (GH).

[0093]

[0094] (Explanation of symbols)

[0095] 100: Control Unit

[0096] 110, 120: Wonsujo

[0097] 111, 121: Raw water feed pump

[0098] 115, 405: Filtration unit

[0099] 210, 220, 230, 240, 250: Nutrient tank

[0100] 211, 221, 231, 241, 251: Nutrient solution dosing pump

[0101] 219, 229, 239, 249, 259: Nutrient tank agitator

[0102] 300: Control unit

[0103] 301: Regulating pump

[0104] 309: Control tank agitator

[0105] 400: Mixing group

[0106] 401: Supply pump

[0107] 510, 520, 530, 540: Nutrient solution discharge part

[0108] GH: Plantation

[0109] LS: Water level sensor

[0110] LG: Water level gauge

[0111] pH: pH sensor

[0112] EC: EC sensor

[0113] Temp: Temperature sensor

[0114] V0, V1, V2: valves

Claims

1. Source tank; A nutrient solution tank and a control tank that produce and store nutrient solution by introducing raw water from the above-mentioned raw water tank; and It includes a mixing tank in which raw water flows in from the above raw water tank, and nutrient solution flows in from the above nutrient solution tank and the control tank, is mixed, and stored. A method for integrated control of a hydroponic nutrient solution supply system in which nutrient solution is supplied from the mixing tank to the cultivation area (GH) of a hydroponic facility by a supply pump (401), The above mixing tank is equipped with a nutrient solution recirculation line and a pH sensor, The above nutrient solution recirculation line is equipped with valves (V1, V2), A learning model is created using the mixing tank pH confirmed by the pH sensor, the hourly change in the mixing tank pH confirmed by the pH sensor, and the recirculation power of the supply pump (401) as a learning data set. By inputting the mixing tank pH and the mixing tank pH hourly change amount into the above-generated learning model, the recirculation power of the supply pump (401) is confirmed, and the supply pump (401) is controlled accordingly, and when the recirculation power of the supply pump (401) exceeds 0, the valves (V1, V2) are controlled to open. An EC (electrical conductivity) sensor is further provided in the above mixing tank, The above learning model is, A model that learns the mixing tank pH confirmed by the pH sensor, the hourly change in the mixing tank pH confirmed by the pH sensor, the mixing tank EC confirmed by the EC sensor, and the hourly change in the mixing tank EC confirmed by the EC sensor, and the recirculation power of the supply pump (401), and outputs the recirculation power of the supply pump (401) so that the mixing tank pH reaches a predetermined pH while minimizing the hourly change in the mixing tank pH. Integrated control method for a non-stirred hydroponic nutrient solution supply system.

2. In paragraph 1, The above learning data set further includes the mixing tank EC identified by the EC sensor, and the mixing tank EC hourly change identified by the EC sensor, By further inputting the mixing tank EC and the mixing tank EC hourly change amount into the above-mentioned generated learning model, the recirculation power of the supply pump (401) is confirmed. Integrated control method for a non-stirred hydroponic nutrient solution supply system.

3. In paragraph 1, The above mixing tank is further equipped with a CO2 tank, a water level sensor and a temperature sensor, The above learning data set further includes a mixing tank water level identified by the water level sensor and a mixing tank temperature identified by the temperature sensor. Integrated control method for a non-stirred hydroponic nutrient solution supply system.

4. In paragraph 3, The above nutrient solution tank introduces nutrient solution into the mixing tank by means of a nutrient solution dosing pump, The above control tank introduces the nutrient solution into the mixing tank by means of a control pump, By further inputting the mixing tank water level and mixing tank temperature into the above-mentioned generated learning model, the power of the nutrient solution dosing pump and the power of the control pump are further confirmed along with the recirculation power of the supply pump (401). Integrated control method for a non-stirred hydroponic nutrient solution supply system.

5. In paragraph 4, A humidity sensor and a moisture content sensor are provided in the above cultivation area (GH), The above learning data set further includes the cultivation site humidity confirmed by the humidity sensor and the cultivation site moisture content confirmed by the moisture content sensor. Integrated control method for a non-stirred hydroponic nutrient solution supply system.

6. In paragraph 5, A CO2 tank is additionally installed in the above cultivation area (GH), By further inputting the cultivation site humidity and cultivation site moisture content into the above-mentioned generated learning model, the CO2 emission amount of the CO2 tank is further confirmed along with the recirculation power of the supply pump (401), the power of the nutrient solution dosing pump, and the power of the control pump. Integrated control method for a non-stirred hydroponic nutrient solution supply system.

7. In paragraph 6, The amount of change in the pH of the mixing tank is reduced compared to when the mixing tank agitator is always operated in the mixing tank by the above integrated control method. Integrated control method for a non-stirred hydroponic nutrient solution supply system.

8. In paragraph 7, The above nutrient solution tanks are two or more, and each nutrient solution tank is equipped with the above nutrient solution dosing pump. The maximum output of the above nutrient solution dosing pump is greater than the maximum output of the above regulating pump. Integrated control method for a non-stirred hydroponic nutrient solution supply system.

9. In paragraph 8, Each nutrient solution tank is equipped with a nutrient solution tank stirrer, and the control tank is equipped with a control tank stirrer. The maximum output of the above nutrient tank agitator is greater than the maximum output of the above control tank agitator. Integrated control method for a non-stirred hydroponic nutrient solution supply system.

10. A computer program stored in a computer-readable recording medium, which causes an integrated control method of a non-stirring hydroponic nutrient solution supply system according to any one of claims 1 to 9 to be performed by a computer.

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