Double-circulation management system for hydroponic nutrient solution

Abstract

The invention provides a double-circulation management system for a hydroponic nutrient solution. The double-circulation management system comprises a mother liquid barrel, a fertilizer mixing box, a nutrient solution pool and a liquid pumping pipeline used for conveying the nutrient solution. The liquid pumping pipeline comprises a first pipeline used for conveying mother liquid in the mother liquid barrel to the fertilizer mixing box, a circulating pipeline used for pumping out a nutrient solution in the fertilizer mixing box and then returning the nutrient solution back, and a second pipeline used for conveying the mixed nutrient solution in the fertilizer mixing box to the nutrient solution pool; the liquid supply pipeline is used for conveying a nutrient solution in the nutrient solution pool to the cultivation grooves; the backflow pipeline is used for conveying the nutrient solution in the cultivation grooves back to the nutrient solution pool; a plurality of mother liquor barrels are arranged, and a first pipeline is independently matched between each mother liquor barrel and the fertilizer mixing box. In the liquid preparation process, the mother liquid barrel can supplement mother liquid to the fertilizer mixing box, and circulating fertilizer preparation is achieved; in the irrigation process, the nutrient solution in the nutrient solution pool and the stock solution in the cultivation groove are circulated, the balance of nutrient absorption of crops in the cultivation groove is guaranteed, and the growth consistency of the crops is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of hydroponics, and in particular to a double-circulation management system of a hydroponic nutrient solution. Background Art

[0002] Hydroponics is a soilless cultivation method that directly immerses the roots of plants in nutrient solution, providing water, nutrients and oxygen so that the plants can grow normally.

[0003] Hydroponic technology has become an important aspect of precision agriculture due to its unique advantages such as convenient management, high resource utilization, high degree of intensiveness, and land conservation. In the hydroponic process, the uniformity of nutrient solution mixing and the uniformity of nutrient solution dispersion in the cultivation tank will affect the growth of plants. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes a double circulation management system for hydroponic nutrient solution.

[0005] The present invention provides a double-circulation management system for hydroponic nutrient solution, comprising: a mother liquid barrel, a fertilizer mixing box, a nutrient solution pool, and a pump pipeline for conveying the nutrient solution;

[0006] The pump liquid pipeline includes a first pipeline connecting the mother liquid barrel and the fertilizer mixing box to transport the mother liquid in the mother liquid barrel to the fertilizer mixing box, a circulation pipeline connected to the fertilizer mixing box at both ends to extract the nutrient solution in the fertilizer mixing box and then return it to form a fertilizer mixing cycle, a second pipeline connecting the fertilizer mixing box and the nutrient solution pool to transport the mixed nutrient solution in the fertilizer mixing box to the nutrient solution pool, a liquid supply pipeline connected to the nutrient solution pool to transport the nutrient solution in the nutrient solution pool to the cultivation tank, and a reflux pipeline for returning the nutrient solution in the cultivation tank to the nutrient solution pool;

[0007] There are multiple mother liquid barrels, and each mother liquid barrel is individually matched with a first pipeline between the mother liquid barrel and the fertilizer mixing box.

[0008] Preferably, there are multiple nutrient solution pools, each of which is individually matched with a liquid supply pipeline and a return pipeline, and a first control valve for controlling the connection and disconnection of the two is provided between each nutrient solution pool and the second pipeline.

[0009] Preferably, the liquid supply pipeline includes a liquid supply main pipe and several liquid supply branch pipes connected to the liquid supply main pipe, each liquid supply branch pipe is connected to a cultivation trough, and each liquid supply branch pipe is provided with a second control valve that independently controls its on and off; the return pipeline includes a return main pipe and several return branch pipes connected to the return main pipe, each return branch pipe is connected to a cultivation trough.

[0010] Preferably, a sub-control valve for controlling the on-off of each reflux branch is installed in each reflux branch.

[0011] Preferably, each sub-control valve is respectively linked with the corresponding second control valve so as to be opened and closed synchronously with the second control valve.

[0012] Preferably, the cultivation trough is provided with an overflow port, and the reflux branch is connected to the overflow port of the corresponding cultivation trough.

[0013] Preferably, an integrated machine is installed in the pumping pipeline, the integrated machine has a liquid inlet and a liquid outlet corresponding to the liquid inlet, a circulation inlet and a circulation outlet corresponding to the circulation inlet, and a delivery port, and there are multiple liquid inlets and liquid outlets; a first pump and a second pump are provided in the integrated machine, and there are multiple first pumps, each of which has an inlet connected to a corresponding liquid inlet and an outlet connected to a corresponding liquid outlet; the inlet of the second pump is connected to the circulation inlet, and the outlet of the second pump is connected to two pumping branches, one of which is connected to the circulation inlet. The outlet is connected, and the other pumping branch is connected to the delivery port, and the two pumping branches are both equipped with a third control valve for controlling the on-off thereof; the first pipeline comprises a first liquid inlet pipe and a first liquid outlet pipe, the first liquid inlet pipe connects the mother liquid barrel and the liquid inlet of the integrated machine, and the first liquid outlet pipe connects the liquid outlet of the integrated machine and the fertilizer mixing tank; the circulation pipeline comprises a second liquid inlet pipe and a second liquid outlet pipe, the second liquid inlet pipe connects the fertilizer mixing tank and the circulation inlet of the integrated machine, and the second liquid outlet pipe connects the circulation outlet of the integrated machine and the fertilizer mixing tank; the second pipeline is connected to the delivery port.

[0014] Preferably, the third control valves in the two pumping branches are linked to each other, so that when the third control valve in one pumping branch is opened, the third control valve in the other pumping branch is closed.

[0015] Preferably, the first pump is a peristaltic pump.

[0016] Preferably, the second pump is a constant pressure variable frequency pump.

[0017] Preferably, an ion concentration sensor for detecting the ion concentration in the pool and a liquid level sensor for detecting the liquid level in the pool are installed in the nutrient solution pool;

[0018] The dual-circulation management system of the hydroponic nutrient solution also includes a control module and a water replenishment pipeline connected to the fertilizer tank for conveying clean water into the fertilizer tank; when the liquid level sensor detects that the liquid level in the nutrient solution pool reaches a preset lower limit value of the liquid level, the control module is triggered to enter the fertilizer mode. In the fertilizer mode, the control module calculates the amount of clean water and the amount of mother liquid required for fertilizer according to the liquid level detected by the current liquid level sensor and the ion concentration detected by the current ion concentration sensor; and according to the calculated results, the water replenishment pipeline is driven to convey a corresponding amount of clean water to the fertilizer tank, and the first pipeline is driven to convey a corresponding amount of mother liquid to the fertilizer tank to complete the fertilizer.

[0019] Preferably, the nutrient solution pool also has a preset liquid level upper limit value. In the fertilizer mixing mode, the control module calculates the total amount of nutrient solution to be added based on the preset liquid level upper limit value and the liquid level lower limit value, and makes the sum of the calculated amount of clean water and the amount of mother liquid required for fertilizer mixing not greater than the total amount of nutrient solution to be added.

[0020] Preferably, a distributor and a collecting hopper are provided in the fertilizer mixing box. The distributor is located inside the collecting hopper and has an internal space. The surface of the distributor is densely covered with holes. A drainage channel is provided at the bottom of the collecting hopper. The liquid outlet ends of all first pipelines extend into the distributor.

[0021] Preferably, a sub-box is fixed below the fertilizer mixing box, and a drainage port connected to the sub-box and a drainage valve for controlling the on-off of the drainage port are provided at the bottom of the fertilizer mixing box.

[0022] Preferably, the sub-box is connected to the second pipeline through the third pipeline, and a fourth control valve for directly connecting and disconnecting the third pipeline and the second pipeline is provided at the junction of the third pipeline and the second pipeline, and a fifth control valve is provided on the side of the second pipeline located at the access end of the third pipeline close to the fertilizer mixing box.

[0023] Preferably, a slot is provided on the side wall of one side of the mother liquid barrel, and an insert matching the slot is provided on the side wall of the other side; each mother liquid barrel is connected to the slots on other mother liquid barrels through its own insert to form a whole.

[0024] Preferably, an agitator is provided in the mother liquid barrel.

[0025] In the present invention, each mother liquid barrel is used to store different mother liquids, each mother liquid barrel is connected to a fertilizer mixing box through a corresponding first tube, and corresponding mother liquids are drawn from each mother liquid barrel according to a set ratio and enter the fertilizer mixing box for mixing; during the mixing process, the mixed liquid in the box is continuously drawn in and out by a circulation pipeline, so that during the liquid preparation process, the mother liquid barrel can replenish the mother liquid to the fertilizer mixing box, thereby realizing cyclic fertilizer preparation, and the mixing effect of the nutrient solution in the fertilizer mixing box is improved through continuous circulation. The nutrient solution after fertilizer preparation is transported to the nutrient solution pool via the second pipeline, transferred from the nutrient solution pool, and then transported to the cultivation trough by the liquid supply pipeline to supplement the required nutrients for the crops in the cultivation trough. In the process of supplying liquid to the cultivation trough, the return pipeline connecting the cultivation trough and the nutrient solution pool is continuously operated to make the liquid in the cultivation trough continuously return to the nutrient solution pool, and then transported to the cultivation trough again from the nutrient solution pool, so that the nutrient solution can continuously circulate in the cultivation trough after entering the cultivation trough, and continuously circulate and mix with the original liquid in the cultivation trough, so that during the irrigation process, the nutrient solution in the nutrient solution pool and the original liquid in the cultivation trough are circulated to ensure the balance of nutrient absorption of the crops in the cultivation trough and ensure the consistency of crop growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1A schematic diagram of the working principle of a double circulation management system for hydroponic nutrient solution proposed by the present invention;

[0027] Figure 2 This is a schematic structural diagram of the distributor and the collecting hopper inside the fertilizer mixing box in a double circulation management system for hydroponic nutrient solution proposed by the present invention;

[0028] Figure 3 This is a schematic structural diagram of the liquid inlet pipeline in a double-circulation management system for hydroponic nutrient solution proposed by the present invention;

[0029] Figure 4 This is a schematic diagram of the plug-in state of the mother liquid barrel in the double-circulation management system of the hydroponic nutrient solution proposed by the present invention. DETAILED DESCRIPTION

[0030] Reference Figure 1 The present invention proposes a double-circulation management system for hydroponic nutrient solution, comprising: a mother liquid barrel 1, a fertilizer mixing box 2, a nutrient solution pool 3, and a pump pipeline for conveying the nutrient solution;

[0031] The pump liquid pipeline includes a first pipeline 4 connecting the mother liquid barrel 1 and the fertilizer mixing box 2 to transport the mother liquid in the mother liquid barrel 1 to the fertilizer mixing box 2, a circulation pipeline 5 connected to the fertilizer mixing box 2 at both ends to extract the nutrient solution in the fertilizer mixing box 2 and then return it to form a circulation of the nutrient solution in the fertilizer mixing box 2, a second pipeline 6 connecting the fertilizer mixing box 2 and the nutrient solution pool 3 to transport the mixed nutrient solution in the fertilizer mixing box 2 to the nutrient solution pool 3, and a liquid supply pipeline 8 connected to the nutrient solution pool 3 to transport the nutrient solution in the nutrient solution pool 3 to the cultivation tank 11 and a reflux pipeline 9 for returning the nutrient solution in the cultivation tank 11 to the nutrient solution pool 3. There are multiple mother liquid barrels 1, and each mother liquid barrel 1 is matched with a first pipeline 4 separately between the mixing box 2.

[0032] When in use, various mother liquids are pre-configured in each mother liquid barrel 1, and then the corresponding mother liquids are drawn from each mother liquid barrel 1 according to the set ratio and enter the fertilizer mixing box 2 for mixing; during the mixing process, the mixed liquid in the box is continuously pumped in and out by the circulation pipeline 5, so that it is continuously circulated to realize circular fertilizer mixing and ensure the uniformity of the nutrient solution mixing in the fertilizer mixing box 2.

[0033] The evenly mixed nutrient solution is transported to the nutrient solution pool 3 via the second pipeline, temporarily stored or transferred by the nutrient solution pool 3, and then transported to the cultivation trough 11 by the liquid supply pipeline 8 to supplement the required nutrients for the crops in the cultivation trough 11. In the process of supplying liquid to the cultivation trough 11, the return pipeline 9 connecting the cultivation trough 11 and the nutrient solution pool 3 is continuously operated to make the liquid in the cultivation trough 11 continuously return to the nutrient solution pool 3, and then transported to the cultivation trough 11 again by the nutrient solution pool 3, so that the nutrient solution enters the cultivation trough 11 and continuously circulates in the cultivation trough 11, and continuously mixes with the original liquid in the cultivation trough 11, so that during the irrigation process, the nutrient solution in the nutrient solution pool and the original liquid in the cultivation trough are circulated to ensure the balance of nutrient absorption of the crops in the cultivation trough 11, thereby enhancing the consistency of crop growth.

[0034] In addition, in this embodiment, there are multiple nutrient solution pools 3, each nutrient solution pool 3 is individually matched with a liquid supply pipeline 8 and a return pipeline 9, and a first control valve 10 for controlling the on-off of the two is provided between each nutrient solution pool 3 and the second pipeline 6. During operation, the second pipeline 6 is controlled by the first control valve 10 to transport nutrient solution to different nutrient solution pools 3, and each nutrient solution pool 3 is matched with a corresponding cultivation tank 11, so as to facilitate the division of the cultivation tank 11 into regions and classification management.

[0035] Furthermore, the liquid supply pipeline 8 in this embodiment includes a liquid supply main pipe and several liquid supply branch pipes connected to the liquid supply main pipe, each liquid supply branch pipe is connected to a cultivation trough 11, and each liquid supply branch pipe is provided with a second control valve 12 for independently controlling its on and off, and the return pipeline 9 includes a return pipe and several return branch pipes connected to the return pipe, each return branch pipe is connected to a cultivation trough 11, so that each cultivation trough 11 can supply and circulate liquid independently according to its own needs.

[0036] Furthermore, a sub-control valve 13 for controlling the on-off of each reflux branch is installed respectively, and each sub-control valve 13 is linked with the corresponding second control valve 12 respectively. When the second control valve is opened or closed, the corresponding sub-control valve 13 is started synchronously.

[0037] Furthermore, the cultivation trough 11 is provided with an overflow port, and the reflux branch is connected to the overflow port of the corresponding cultivation trough 11 .

[0038] In this embodiment, an integrated machine 14 is installed in the pumping pipeline. The integrated machine 14 has a liquid inlet a1 and a liquid outlet a2 corresponding to the liquid inlet a1, a circulation inlet b1 and a circulation outlet b2 corresponding to the circulation inlet b1, and a delivery port b3, and the liquid inlet a1 and the liquid outlet a2 are provided in multiple. A first pump 15 and a second pump 16 are provided in the integrated machine 14. The first pump 15 is a peristaltic pump. The first pump 15 is provided in multiples. The inlet of each first pump 15 is connected to a corresponding liquid inlet a1, and its outlet is connected to a corresponding liquid outlet a2. The second pump 16 is a constant pressure variable frequency pump. The inlet of the second pump 16 is connected to the circulation inlet b1, and the outlet of the second pump 16 is connected to two pumping branches, one of which is connected to the circulation outlet b2, and the other is connected to the delivery port b3, and the two pumping branches are installed with a third control valve 17 for controlling the opening and closing thereof. The first pipeline 4 includes a first liquid inlet pipe and a first liquid outlet pipe, the first liquid inlet pipe connects the mother liquid barrel 1 and the liquid inlet a1 of the integrated machine 14, and the first liquid outlet pipe connects the liquid outlet a2 of the integrated machine 14 and the fertilizer mixing tank 2. The circulation pipeline 5 includes a second liquid inlet pipe and a second liquid outlet pipe, the second liquid inlet pipe connects the fertilizer mixing tank 2 and the circulation inlet b1 of the integrated machine 14, and the second liquid outlet pipe connects the circulation outlet b2 of the integrated machine 14 and the fertilizer mixing tank 2. The second pipeline 6 is connected to the delivery port b3. The present invention arranges a circulation inlet b1, a circulation outlet b2, a delivery port b3, and a plurality of liquid inlets a1 and liquid outlets a2 on the integrated machine 14, and concentrates the corresponding pumps inside the integrated machine 14, so that the corresponding circulation inlet b1 is connected with the circulation outlet b2 by each pump, and each liquid inlet a1 is connected with the corresponding liquid outlet a2, and the output port and the circulation outlet b2 are connected in parallel by the third control valve 17; each pipeline only needs to be connected to the corresponding interface to realize the connection of the pipeline, which greatly facilitates the arrangement of the pipeline.

[0039] Furthermore, the third control valves 17 in the two pumping branches are linked so that when the third control valve 17 in one of the pumping branches is opened, the third control valve 17 in the other pumping branch is closed, so that when the circulation pipeline 5 is working, the second pipeline 6 is not working, and when the second pipeline 6 is working, the circulation pipeline 5 is not working.

[0040] In addition, in this embodiment, an ion concentration sensor for detecting the ion concentration in the pool and a liquid level sensor for detecting the liquid level in the pool are installed in the nutrient solution pool 3. The dual-circulation management system of the hydroponic nutrient solution also includes a control module and a water supply pipeline 19 connected to the fertilizer tank 2 for conveying clean water to the fertilizer tank 2; when the liquid level sensor detects that the liquid level in the nutrient solution pool 3 reaches the preset lower limit of the liquid level, the control module is triggered to enter the fertilizer mode. In the fertilizer mode, the control module calculates the amount of clean water and the amount of mother liquid required for fertilizer according to the liquid level detected by the current liquid level sensor and the ion concentration detected by the current ion concentration sensor; and drives the water supply pipeline 19 to convey a corresponding amount of clean water to the fertilizer tank 2 according to the calculated results, and drives the first pipeline 4 to convey a corresponding amount of mother liquid to the fertilizer tank 2 to complete the fertilizer. Thus, the management system can generate a new fertilizer formula according to the ion concentration and liquid level changes in the nutrient solution pool 3 during the irrigation process, and mix fertilizer in the fertilizer mixing box 2 according to the newly generated fertilizer formula to add the newly prepared nutrient solution to the nutrient solution pool 3.

[0041] Furthermore, the nutrient solution pool 3 is also preset with an upper limit value of the liquid level. In the fertilizer mixing mode, the control module calculates the total amount of nutrient solution to be added according to the preset upper limit value and lower limit value of the liquid level, and makes the sum of the calculated amount of clean water and the amount of mother liquid required for fertilizer mixing not greater than the total amount of nutrient solution to be added.

[0042] Reference Figure 2 In this embodiment, a distributor 203 and a collecting hopper 204 are provided in the fertilizer mixing box 2. The distributor 203 is located on the inner side of the collecting hopper 204. The distributor 203 has an internal space. The surface of the distributor 203 is densely covered with holes, and a drainage channel is provided at the bottom of the collecting hopper 204. The liquid outlet ends of all the first pipelines 4 extend into the distributor 203, and the nutrient solution enters the distributor 203, and is discharged into the collecting hopper 204 through the holes on the distributor 203, and then discharged from the drainage channel at the bottom of the collecting hopper 204, so as to improve the uniformity of the nutrient solution mixing by dispersing in the aggregation mode.

[0043] In this embodiment, a sub-box 18 is fixed below the fertilizer mixing box 2, and a drain port connected to the sub-box 18 and a drain valve for controlling the opening and closing of the drain port are arranged at the bottom of the fertilizer mixing box 2. When new nutrient solution is needed, the original nutrient solution in the fertilizer mixing box 2 can be discharged into the sub-box 18 for temporary storage.

[0044] The sub-box 18 is connected to the second pipeline 6 through the third pipeline 19, and a fourth control valve 20 for directly connecting and disconnecting the third pipeline 19 and the second pipeline 6 is provided at the junction of the third pipeline 19 and the second pipeline 6, and a fifth control valve 21 is provided on the side of the second pipeline 6 located at the access end of the third pipeline 19 close to the fertilizer mixing box 2. During operation, the third pipeline 19 can be connected to the second pipeline 6 by opening the fourth control valve 20 and closing the fifth control valve 21, and then the nutrient solution in the sub-box 18 can be pumped into the second pipeline 6 through the third pipeline 19, and then transported to the corresponding nutrient solution pool 3 by the second pipeline 6. In this way, during the process of mixing the medicine and liquid in the fertilizer mixing box 2, the sub-box 18 can continue to supply liquid as a liquid supply source, so that the medicine can be continuously mixed according to the different requirements of different cultivation tanks 11 for the nutrient solution ratio, and then the work efficiency can be effectively improved.

[0045] Reference Figure 3 In this embodiment, the fertilizer mixing box 2 is connected to a liquid inlet pipeline 201, and the liquid inlet pipeline 201 has a plurality of pipe interfaces 202, each of which is arranged at intervals in the length direction of the liquid inlet pipeline 201 and is arranged in a circumferential direction of the liquid inlet pipeline 201; the output ends of all the first pipelines 4 are connected to each pipe interface 202 in a one-to-one correspondence. When the mother liquid in each mother liquid barrel 1 enters the liquid inlet pipeline 201 through the first pipe, it can enter the interior of the pipeline from different angles and sections, which is conducive to the mixing of each mother liquid in the pipeline, and can avoid pipeline blockage, ensuring smooth liquid inlet and discharge of the liquid inlet pipeline 201.

[0046] Furthermore, in order to further increase the mixing effect, in this embodiment, the liquid outlet end of the liquid inlet pipe 201 is arranged at the central part of the top of the fertilizer mixing box 2, and the pipe interface 202 is arranged outside the fertilizer mixing box 2 and obliquely connected to the liquid inlet pipe 201.

[0047] Reference Figure 4 In this embodiment, a slot 101 is provided on the side wall of one side of the mother liquid barrel 1, and a plug block 102 matching the slot 101 is provided on the side wall of the other side; each mother liquid barrel 1 is connected with the slot 101 on other mother liquid barrels 1 through its own plug block 102 to form a whole, so as to facilitate the centralized management of the mother liquid barrels 1 and to facilitate the transfer. Rollers are provided at the bottom of the mother liquid barrel 1, so that it is convenient for the mother liquid barrel 1 to move individually and as a whole.

[0048] The mother liquid barrel 1 is provided with a stirrer 7. When the mother liquid is prepared, a certain amount of clean water is poured into the mother liquid barrel 1 in advance, and then a certain amount of sub-material is added, and the stirrer 7 is used to fully stir the mother liquid to form the mother liquid.

[0049] As can be seen from the above, in the present invention, each mother liquid barrel 1 is used to store different mother liquids, and each mother liquid barrel 1 is connected to the mixing fertilizer box 2 through a corresponding first tube. According to the set ratio, the corresponding mother liquid is extracted from each mother liquid barrel 1 and enters the mixing fertilizer box 2 for mixing; during the mixing process, the circulating pipeline 5 continuously draws the mixed liquid in the box in and out, so that during the liquid preparation process, the mother liquid barrel can replenish the mother liquid to the mixing fertilizer box, realize the circulating fertilizer preparation, and improve the mixing effect of the nutrient solution in the mixing fertilizer box 2 through continuous circulation. The evenly mixed nutrient solution is transported to the nutrient solution pool 3 via the second pipeline, transferred by the nutrient solution pool 3, and then transported to the cultivation trough 11 by the liquid supply pipeline 8 to supplement the required nutrients for the crops in the cultivation trough 11. In the process of supplying liquid to the cultivation trough 11, the return pipeline 9 connecting the cultivation trough 11 and the nutrient solution pool 3 is continuously operated to make the liquid in the cultivation trough 11 continuously return to the nutrient solution pool 3, and then transported to the cultivation trough 11 again by the nutrient solution pool 3, so that the nutrient solution enters the cultivation trough 11 and continuously circulates in the cultivation trough 11, and continuously mixes with the original liquid in the cultivation trough 11, so that during the irrigation process, the nutrient solution in the nutrient solution pool 3 and the original liquid in the cultivation trough 11 circulate to ensure the balance of nutrient absorption of the crops in the cultivation trough 11, thereby enhancing the consistency of crop growth.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double circulation management system for hydroponic nutrient solution, characterized in that: include: A mother liquid barrel (1), a fertilizer mixing box (2), a nutrient solution pool (3), and a pump pipeline for conveying the nutrient solution; The pump liquid pipeline comprises a first pipeline (4) connecting a mother liquid barrel (1) and a fertilizer mixing box (2) to transport the mother liquid in the mother liquid barrel (1) to the fertilizer mixing box (2), a circulation pipeline (5) connected to the fertilizer mixing box (2) at both ends to extract the nutrient solution in the fertilizer mixing box (2) and then return it to form a fertilizer distribution cycle, a second pipeline (6) connecting the fertilizer mixing box (2) and a nutrient solution pool (3) to transport the mixed nutrient solution in the fertilizer mixing box (2) to the nutrient solution pool (3), a liquid supply pipeline (8) connected to the nutrient solution pool (3) to transport the nutrient solution in the nutrient solution pool (3) to a cultivation tank, and a return pipeline (9) used to return the nutrient solution in the cultivation tank to the nutrient solution pool (3); A plurality of mother liquid barrels (1) are provided, and a first pipeline (4) is independently matched between each mother liquid barrel (1) and the fertilizer mixing box (2).

2. A double circulation management system for hydroponic nutrient solution according to claim 1, characterized in that: A plurality of nutrient solution pools (3) are provided, each nutrient solution pool (3) is individually matched with a liquid supply pipeline (8) and a return pipeline (9), and a first control valve (10) for controlling the connection between each nutrient solution pool (3) and the second pipeline (6) is provided between the two.

3. A double circulation management system for hydroponic nutrient solution according to claim 1, characterized in that: The liquid supply pipeline (8) comprises a liquid supply main pipe and a plurality of liquid supply branch pipes connected to the liquid supply main pipe, each liquid supply branch pipe is connected to a cultivation tank (11), and each liquid supply branch pipe is provided with a second control valve (12) for independently controlling its on and off; the return pipeline (9) comprises a return pipe and a plurality of return branch pipes connected to the return pipe, each return branch pipe is connected to a cultivation tank (11).

4. A double circulation management system for hydroponic nutrient solution according to claim 3, characterized in that: A sub-control valve (13) is installed in each return branch to control its on-off; Preferably, each sub-control valve (13) is respectively linked with the corresponding second control valve (12) so as to be opened and closed synchronously with the second control valve (12); Preferably, the cultivation trough (11) is provided with an overflow port, and the reflux branch is connected to the overflow port of the corresponding cultivation trough (11).

5. A double circulation management system for hydroponic nutrient solution according to claim 1, characterized in that: An integrated machine (14) is installed in the pumping pipeline. The integrated machine (14) has a liquid inlet (a1) and a liquid outlet (a2) corresponding to the liquid inlet (a1), a circulation inlet (b1) and a circulation outlet (b2) corresponding to the circulation inlet (b1), and a delivery port (b3). The liquid inlet (a1) and the liquid outlet (a2) are both provided in plurality. A first pump (15) and a second pump (16) are provided in the integrated machine (14). The first pump (15) is provided in plurality. The inlet of each first pump (15) is connected to a corresponding liquid inlet (a1), and the outlet thereof is connected to a corresponding liquid outlet (a2). The inlet of the second pump (16) is connected to the circulation inlet (b1), and the outlet of the second pump (16) is connected to two pumping branches, one of which is a pumping branch. The branch is connected to the circulation outlet (b2), and the other pumping branch is connected to the delivery port (b3), and the two pumping branches are both installed with a third control valve (17) for controlling the on-off thereof; the first pipeline (4) comprises a first liquid inlet pipe and a first liquid outlet pipe, the first liquid inlet pipe connects the mother liquid barrel (1) and the liquid inlet (a1) of the integrated machine (14), and the first liquid outlet pipe connects the liquid outlet (a2) of the integrated machine (14) and the fertilizer mixing box (2); the circulation pipeline (5) comprises a second liquid inlet pipe and a second liquid outlet pipe, the second liquid inlet pipe connects the fertilizer mixing box (2) and the circulation inlet (b1) of the integrated machine (14), and the second liquid outlet pipe connects the circulation outlet (b2) of the integrated machine (14) and the fertilizer mixing box (2); the second pipeline (6) is connected to the delivery port (b3).

6. A double circulation management system for hydroponic nutrient solution according to claim 5, characterized in that: The third control valves (17) in the two pumping branches are linked so that when the third control valve (17) in one pumping branch is opened, the third control valve (17) in the other pumping branch is closed; Preferably, the first pump (15) is a peristaltic pump; Preferably, the second pump (16) is a constant pressure variable frequency pump.

7. A double circulation management system for hydroponic nutrient solution according to claim 1, characterized in that: An ion concentration sensor for detecting the ion concentration in the nutrient solution pool (3) and a liquid level sensor for detecting the liquid level in the pool are installed in the nutrient solution pool (3); The dual-circulation management system of the hydroponic nutrient solution further comprises a control module and a water supply pipeline (19) connected to the fertilizer distribution box (2) for conveying clean water into the fertilizer distribution box (2); when the liquid level sensor detects that the liquid level in the nutrient solution pool (3) reaches a preset lower limit value of the liquid level, the control module is triggered to enter a fertilizer distribution mode. In the fertilizer distribution mode, the control module calculates the amount of clean water and the amount of mother liquid required for fertilizer distribution according to the liquid level detected by the current liquid level sensor and the ion concentration detected by the current ion concentration sensor; and according to the calculated results, the water supply pipeline (19) is driven to convey a corresponding amount of clean water to the fertilizer distribution box (2), and the first pipeline (4) is driven to convey a corresponding amount of mother liquid to the fertilizer distribution box (2), so as to complete the fertilizer distribution; Preferably, the nutrient solution pool (3) is also preset with an upper limit value of the liquid level. In the fertilizer preparation mode, the control module calculates the total amount of nutrient solution to be added based on the preset upper limit value and lower limit value of the liquid level, and makes the sum of the calculated amount of clean water and the amount of mother liquid required for fertilizer preparation not greater than the total amount of nutrient solution to be added.

8. The double circulation management system of a hydroponic nutrient solution according to claim 1, characterized in that: A distributor (203) and a collecting hopper (204) are provided in the fertilizer mixing box (2); the distributor (203) is located inside the collecting hopper (204); the distributor (203) has an internal space; the surface of the distributor (203) is densely covered with holes; and a drainage channel is provided at the bottom of the collecting hopper (204); and the liquid outlet ends of all the first pipelines (4) extend into the distributor (203); Preferably, a sub-box (18) is fixed below the fertilizer mixing box (2), and a drainage port connected to the sub-box (18) and a drainage valve for controlling the on-off of the drainage port are provided at the bottom of the fertilizer mixing box (2); Preferably, the sub-box (18) is connected to the second pipeline (6) via a third pipeline (19), and a fourth control valve (20) for directly connecting and disconnecting the third pipeline (19) and the second pipeline (6) is provided at the junction of the third pipeline (19) and the second pipeline (6), and a fifth control valve (21) is provided on the side of the second pipeline (6) located at the access end of the third pipeline (19) close to the fertilizer mixing box (2).

9. A double circulation management system for hydroponic nutrient solution according to claim 1, characterized in that: A slot (101) is provided on the side wall of one side of the mother liquid barrel (1), and an insert block (102) matching the slot (101) is provided on the side wall of the other side; each mother liquid barrel (1) is connected to the slot (101) on other mother liquid barrels (1) through its own insert block (102) to form a whole.

10. A double circulation management system for hydroponic nutrient solution according to claim 9, characterized in that: A stirrer (7) is arranged in the mother liquid barrel (1).

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