A filter device for hydroponic plant nutrient solution

Abstract

This invention relates to the field of nutrient solution filtration technology, and in particular to a filtration device for hydroponic plant nutrient solutions. The device includes a connecting frame, on which a circulation tank is fixedly mounted. At least one holding cylinder is fixedly mounted inside the circulation tank, and a filtration assembly is installed inside the holding cylinder. Through the arrangement of the filtration assembly, as the nutrient solution passes through it, firstly, after filtration, a switching component guides the filtered nutrient solution into the circulation tank, thereby achieving purification and temporary storage of the nutrient solution. Secondly, as the switching component moves downward, it gradually closes the flow channel, generating suction that adsorbs impurities on the filtration assembly, helping to maintain its unobstructed flow and ensuring the smooth flow of the nutrient solution.

Description

Technical Field

[0001] This invention relates to the field of nutrient solution filtration technology, and in particular to a filtration device for nutrient solutions of hydroponic plants. Background Technology

[0002] Hydroponic plant nutrient solutions are an essential foundation for plant growth, primarily composed of inorganic salts (including macro- and micro-elements), organic matter (such as humic acid and amino acids), buffers (to maintain pH stability), and beneficial microorganisms (to promote nutrient absorption). These components work together to provide plants with the necessary nutrients and a suitable growth environment, supporting their healthy development.

[0003] In the maintenance of hydroponic plants, the nutrient solution is usually filtered after use to save costs and extend its lifespan. However, in practice, the roots of hydroponic plants may mix with the nutrient solution during their growth, resulting in impurities such as rootstocks, root hairs, or fallen leaves being mixed into the solution. When filtering the nutrient solution with a filter, these plant debris not only increase the likelihood of filter clogging but also significantly reduce filtration efficiency. In particular, once the roots of hydroponic plants enter the filter, their fibrous structure easily becomes entangled on the filter surface, thus hindering the normal flow of the nutrient solution. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a filtration device for hydroponic plant nutrient solutions.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a filtration device for hydroponic plant nutrient solution, comprising a connecting frame, a circulation box fixedly installed on the connecting frame, at least one holding cylinder fixedly installed inside the circulation box, a filtration component inside the holding cylinder for intercepting root impurities in the nutrient solution when it needs to be replaced, a hydroponic pot fixedly installed on the top of the holding cylinder, the hydroponic pot having through holes for the roots of hydroponic plants to pass through, an electric actuator fixedly installed on the bottom wall of the circulation box, a switch component at the telescopic end of the electric actuator, and a circulation component between the circulation box and the holding cylinder for re-transporting the filtered nutrient solution back into the holding cylinder.

[0006] Preferably, the filter assembly includes a baffle and a hanging cylinder. The baffle is fixedly installed on the inner wall of the container. A groove is provided on the top of the baffle. A filter screen is placed on the top of the container. A ring is fixedly connected to the bottom of the filter screen. A connecting space is provided between the ring and the groove. The hanging cylinder is fixedly installed on the baffle, and the top of the hanging cylinder is located in the connecting space. An outlet is provided on the top of the hanging cylinder.

[0007] Preferably, the switching assembly includes an arc-shaped block and a first sieve plate. The first sieve plate is fixedly connected to the telescopic end of the electric push rod. Solenoid valves are fixedly installed on the filter holes of the first sieve plate. The first sieve plate is located inside the hanging cylinder. A second sieve plate is rotatably connected to the top of the first sieve plate. A torsion assembly is provided between the first sieve plate and the second sieve plate. The arc-shaped block is fixedly installed on the inner top surface of the hanging cylinder. A top rod is fixedly connected to the top of the second sieve plate. The top rod cooperates with the inclined surface opened on the arc-shaped block. A flow-guiding groove is opened on the side wall of the hanging cylinder. The flow-guiding grooves are symmetrically opened.

[0008] Preferably, an intercepting mesh is fixedly installed inside the diversion channel, and the filter holes of the intercepting mesh are smaller than those of the first sieve plate and the second sieve plate.

[0009] Preferably, the torsion assembly includes a rotating rod, which is fixedly connected to the bottom of the second sieve plate. One end of the rotating rod passes through the first sieve plate and is fixedly connected to a baffle plate. A torsion spring is installed between the baffle plate and the first sieve plate, and the torsion spring is sleeved on the outer wall of the rotating rod.

[0010] Preferably, a top cylinder is rotatably connected to the top center of the hanging cylinder, a sliding rod is slidably connected inside the top cylinder, the top end of the sliding rod is fixedly connected to the filter screen, a sliding groove is provided on the outer wall of the top cylinder, and a pulling component is provided between the sliding rod and the second sieve plate.

[0011] Preferably, the pulling assembly includes a slider, a pulley, and a clearance groove. The slider is fixedly connected to the slide rod and slidably connected inside the slide groove. The pulley is fixedly installed on the outer wall of the top cylinder. The slider is connected to the second sieve plate by a pull rope wound on the pulley. The clearance groove is opened at the top of the hanging cylinder.

[0012] Preferably, a counterweight ring is slidably connected to the outer wall of the top cylinder, a pull rod is slidably connected to the top of the counterweight ring, the pull rod is fixedly connected to the slider, a sleeve rod is fixedly connected to the bottom of the counterweight ring, and a baffle plate with the same shape as the outlet is fixedly connected to the bottom end of the sleeve rod.

[0013] Preferably, a cleaning block is fixedly installed at the bottom of the baffle plate, and the shape of the cleaning block is the same as that of the outlet.

[0014] Preferably, the circulation assembly includes a circulation pump, which is fixedly installed on the side wall of the circulation tank. The inlet end of the circulation pump is fixedly connected to an inlet pipe, and the end of the inlet pipe is fixedly connected to the circulation tank. The outlet end of the circulation pump is fixedly connected to an outlet pipe, and the end of the outlet pipe is fixedly connected to a container.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] I. This invention, through the design of the filter assembly, intercepts and accumulates root impurities and other debris as the nutrient solution passes through it. Firstly, after filtration, the switching assembly guides the filtered nutrient solution into the circulation tank, thus purifying and temporarily storing the solution. Secondly, as the switching assembly moves downwards, it gradually closes the flow channel, generating suction that adsorbs impurities from the filter assembly, helping to maintain its unobstructed flow and ensuring the smooth flow of the nutrient solution.

[0017] II. This invention, through the arrangement of the first and second sieve plates, creates a closed movement space near the outlet on the hanging cylinder. The synchronous downward movement of the first and second sieve plates compresses the liquid near the outlet, generating a negative pressure effect. Firstly, this negative pressure effect creates suction, exerting force on the liquid near the outlet and prompting it to enter the hanging cylinder, thus facilitating nutrient solution collection. Secondly, this liquid flow also helps prevent blockages caused by impurities near the outlet, ensuring continued flow. Thirdly, this suction facilitates smoother passage of the nutrient solution above the filter screen, allowing it to flow into the groove.

[0018] Third, this invention utilizes a sliding rod. The slider drives the sliding rod upward, which in turn drives the filter screen upward, causing the filter screen to move above the nutrient solution surface. Simultaneously, because the second sieve plate is moving downward, when it deflects under the action of the torsion spring, it causes the pull rope to deflect within the clearance groove. The pull rope, through the pulley and slider, drives the top cylinder and the sliding rod to deflect, thus keeping the relative positions between the components constant. This facilitates the continuous upward movement of the sliding rod. Furthermore, the deflection of the sliding rod also causes the filter screen to deflect, which helps to create a relative displacement between the filter screen and impurities. Compared to static filtration, this dynamic filtration is more conducive to the collection of nutrient solution through the filter screen. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall filter structure of the present invention. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the overall filter structure of the present invention. Figure 2 .

[0021] Figure 3 This is a schematic diagram of the structure of the present invention along the cross-section of the circulation tank.

[0022] Figure 4 This is a schematic diagram of the structure of the present invention along the cross-section of the holding cylinder and the water-planting pot.

[0023] Figure 5 This is a schematic diagram of the structure of the present invention along the cross-section of the baffle and the filter screen.

[0024] Figure 6 This is a schematic diagram of the structure of the baffle of the present invention.

[0025] Figure 7 This is a schematic diagram of the connection between the hanging cylinder and the top cylinder of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of the present invention along the cross-section of the hanging cylinder. Figure 1 .

[0027] Figure 9 This is a schematic diagram of the structure of the present invention along the cross-section of the hanging cylinder. Figure 1 .

[0028] Figure 10 For the present invention Figure 9 A magnified structural diagram at point A in the diagram.

[0029] Figure 11 This is a schematic diagram of the structure of the connection between the top cylinder and the top cylinder of the present invention.

[0030] In the diagram: 1. Connecting frame; 2. Circulation box; 3. Holding cylinder; 4. Hydroponic planter; 5. Through hole; 6. Electric actuator; 7. Baffle; 8. Hanging cylinder; 9. Groove; 10. Filter screen; 11. Ring; 12. Flow outlet; 13. Arc block; 14. First sieve plate; 15. Solenoid valve; 16. Second sieve plate; 17. Top rod; 18. Drainage channel; 19. Interception net; 20. Rotating rod; 21. Baffle plate; 22. Torsion spring; 23. Top cylinder; 24. Sliding rod; 25. Sliding groove; 26. Sliding block; 27. Pulley; 28. Clearing groove; 29. ​​Counterweight ring; 30. Pull rod; 31. Sleeve rod; 32. Cleaning block; 33. Circulation pump; 34. Inlet pipe; 35. Outlet pipe; 36. Pull rope; 37. Baffle plate. Detailed Implementation

[0031] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0032] Application Scenarios: In the maintenance of hydroponic plants, to save costs and extend the lifespan of the nutrient solution, it is usually filtered after use. However, in practice, the roots of hydroponic plants may mix with the nutrient solution during their growth, resulting in impurities such as rootstocks, root hairs, or fallen leaves being mixed into the solution. When using a filter to filter the nutrient solution, these plant debris not only increase the likelihood of filter clogging but also significantly reduce filtration efficiency. In particular, once the roots of hydroponic plants enter the filter, their fibrous structure easily becomes entangled on the filter surface, thus hindering the normal flow of the nutrient solution.

[0033] like Figures 1 to 11 The filtration device for hydroponic plant nutrient solution shown includes a connecting frame 1, a circulation box 2 fixedly installed on the connecting frame 1, at least one holding cylinder 3 fixedly installed inside the circulation box 2, and a filtration component inside the holding cylinder 3 for intercepting root impurities in the nutrient solution when it needs to be replaced. A hydroponic pot 4 is fixedly installed on the top of the holding cylinder 3, and the hydroponic pot 4 has through holes 5 for the hydroponic plant roots to pass through. An electric actuator 6 is fixedly installed on the bottom wall inside the circulation box 2, and a switch component is provided at the telescopic end of the electric actuator 6. A circulation component is provided between the circulation box 2 and the holding cylinder 3 for transporting the filtered nutrient solution back into the holding cylinder 3.

[0034] It should be understood that during the maintenance of hydroponic plants, the plant roots are placed in the holding tube 3 of the hydroponic pot 4, with the roots extending into the holding tube 3 through the through-hole 5. An appropriate amount of nutrient solution is pre-added to the holding tube 3 to provide the necessary nutrients for the plant. After a period of rest, the switch assembly is activated to open the channel, allowing the nutrient solution to flow to the filter assembly. As the nutrient solution passes through the filter assembly, root impurities and other debris are intercepted and accumulate on the filter assembly. However, over time, these accumulated impurities may clog the filter assembly, hindering the normal flow of the nutrient solution. To solve this problem, on the one hand, after the nutrient solution has been filtered, the switch assembly guides the filtered nutrient solution into the circulation tank 2, thereby purifying and temporarily storing the nutrient solution. On the other hand, as the switch assembly moves downwards, it gradually closes the flow channel. This process generates suction, which adsorbs impurities on the filter assembly, helping to maintain the unobstructed flow of the filter assembly and ensuring the smooth flow of the nutrient solution.

[0035] After the nutrient solution has completed filtration and impurity adsorption, the operator removes the impurities collected in the filtration assembly. Once removal is complete, the circulation assembly is activated, transferring the filtered nutrient solution from circulation tank 2 back to the holding container 3, thus achieving nutrient solution recycling. This process not only improves the efficiency of nutrient solution use but also reduces the risk of malfunctions caused by impurities clogging the filtration assembly, contributing to a more stable and efficient growth environment for hydroponic plants.

[0036] As a further embodiment of the present invention, the filter assembly includes a baffle 7 and a hanging cylinder 8. The baffle 7 is fixedly installed on the inner wall of the container 3. A groove 9 is provided on the top of the baffle 7. A filter screen 10 is placed on the top of the container 3. A ring 11 is fixedly connected to the bottom of the filter screen 10. A connecting space is provided between the ring 11 and the groove 9. The hanging cylinder 8 is fixedly installed on the baffle 7, and the top of the hanging cylinder 8 is located in the connecting space. An outlet 12 is provided on the top of the hanging cylinder 8.

[0037] It should be understood that after the switch assembly is turned on, the nutrient solution to be filtered will flow into the interior of the groove 9 through the filter screen 10. At this time, impurities will be intercepted by the filter screen 10 and accumulate on the top of the filter screen 10. The nutrient solution that has entered the groove 9 will enter the interior of the hanging cylinder 8 through the outlet 12 opened on the hanging cylinder 8, and flow into the interior of the circulation box 2 through the switch assembly for collection, which is beneficial for the subsequent circulation assembly to extract the nutrient solution that has been filtered in the circulation box 2.

[0038] As a further embodiment of the present invention, the switch assembly includes an arc-shaped block 13 and a first sieve plate 14. The first sieve plate 14 is fixedly connected to the telescopic end of the electric push rod 6. Solenoid valves 15 are fixedly installed on the filter holes of the first sieve plate 14. The first sieve plate 14 is located inside the hanging cylinder 8. A second sieve plate 16 is rotatably connected to the top of the first sieve plate 14. A torsion assembly is provided between the first sieve plate 14 and the second sieve plate 16. The arc-shaped block 13 is fixedly installed on the inner top surface of the hanging cylinder 8. A top rod 17 is fixedly connected to the top of the second sieve plate 16. The top rod 17 cooperates with the inclined surface opened on the arc-shaped block 13. A flow channel 18 is opened on the side wall of the hanging cylinder 8. The flow channels 18 are symmetrically opened.

[0039] It should be understood that when the solenoid valve 15 is opened, the nutrient solution flows into the circulation tank 2 through the filter holes on the second sieve plate 16 and the first sieve plate 14. The first sieve plate 14 and the second sieve plate 16 have identical structures and both have filter holes. Furthermore, the filter holes of the two plates completely overlap in the initial state. Thus, after the solenoid valve 15 is opened, the nutrient solution can flow downward through the filter holes and enter the circulation tank 2 for collection. As filtration proceeds, if the liquid flow rate through the filter holes is detected to be less than a preset value, it can be controlled by... The flow rate sensor obtains the liquid flow value or a timer is used to set a time. Upon reaching the set time, the system starts, controlling the electric actuator 6 to move downwards. The electric actuator 6 pulls the first sieve plate 14 downwards along the inner wall of the hanging cylinder 8. The first sieve plate 14 pulls the second sieve plate 16 downwards. The second sieve plate 16 drives the push rod 17 downwards and disengages from the inclined surface on the arc block 13. Without its restraint, the push rod 17, under the action of the torsion assembly, causes the second sieve plate 16 to rotate and move relative to the first sieve plate 14. As the filter holes between the first sieve plate 14 and the second sieve plate 16 gradually shift, the previously overlapping parts form a structure similar to a "sealing plate," helping to prevent direct liquid flow. At this time, the electric actuator 6 continues to drive the first sieve plate 14 downwards, while the second sieve plate 16 moves downwards synchronously with it. The two sieve plates 14 and 16 form a closed movement space near the outlet 12 on the hanging cylinder 8. As the first sieve plate 14 and the second sieve plate 16 move downwards synchronously, the liquid near the outlet 12 of the hanging cylinder 8 is compressed, thereby generating a negative pressure effect at the outlet 12. Firstly, this negative pressure effect creates suction, exerting force on the liquid near the outlet 12, prompting the liquid to enter the interior of the hanging cylinder 8, thus facilitating the collection of nutrient solution. Secondly, this liquid flow can also prevent blockages caused by impurities near the outlet 12, helping to maintain the flow of the outlet 12. Thirdly, the generation of this suction helps to drive the nutrient solution above the filter screen 10 to pass more smoothly through the filter screen 10 and flow into the groove 9.

[0040] As the first sieve plate 14 and the second sieve plate 16 continue to move downward, the impurities that enter the hanging cylinder 8 through the outlet 12 will move with the first sieve plate 14 and the second sieve plate 16. When the first sieve plate 14 and the second sieve plate 16 move to the vicinity of the diversion channel 18, the nutrient solution will flow into the circulation tank 2 through the diversion channel 18, which is conducive to the recycling of the nutrient solution.

[0041] As a further embodiment of the present invention, an intercepting net 19 is fixedly installed inside the diversion channel 18, and the filter holes of the intercepting net 19 are smaller than the filter holes of the first sieve plate 14 and the second sieve plate 16.

[0042] It should be understood that when the nutrient solution moves to the vicinity of the inlet channel 18 along with the first sieve plate 14 and the second sieve plate 16, in order to prevent the tiny impurities remaining in the nutrient solution from flowing into the interior of the circulation tank 2, an intercepting net 19 is added to the inlet channel 18. The filter holes of the intercepting net 19 are set according to the actual situation to ensure that the residual impurities can be further intercepted, thereby facilitating the obtaining of a purer nutrient solution and helping to improve the filtration effect of the nutrient solution.

[0043] As a further embodiment of the present invention, the torsion assembly includes a rotating rod 20, which is fixedly connected to the bottom of the second sieve plate 16. One end of the rotating rod 20 passes through the first sieve plate 14 and is fixedly connected to a baffle plate 21. A torsion spring 22 is installed between the baffle plate 21 and the first sieve plate 14, and the torsion spring 22 is sleeved on the outer wall of the rotating rod 20.

[0044] It should be understood that after the push rod 17 disengages from the inclined surface on the arc block 13, the torsion spring 22 will drive the baffle 21 to rotate, the baffle 21 will drive the rotating rod 20 to rotate, and the rotating rod 20 will drive the second sieve plate 16 to generate relative movement with the first sieve plate 14, which is conducive to the misalignment of the filter holes of the first sieve plate 14 and the second sieve plate 16. As the push rod 17 moves upward, when the push rod 17 contacts the inclined surface on the arc block 13, the inclined surface will push the second sieve plate 16 to rotate, so that the filter holes of the first sieve plate 14 and the second sieve plate 16 coincide.

[0045] As a further embodiment of the present invention, a top cylinder 23 is rotatably connected to the top center of the hanging cylinder 8, a sliding rod 24 is slidably connected inside the top cylinder 23, the top end of the sliding rod 24 is fixedly connected to the filter screen 10, a sliding groove 25 is provided on the outer wall of the top cylinder 23, and a pulling component is provided between the sliding rod 24 and the second sieve plate 16.

[0046] It should be understood that, as illustrated in the above example, the filter screen 10 intercepts impurities in the nutrient solution. However, impurities accumulate on the filter screen 10, affecting the flow of the nutrient solution. While generating suction near the outlet 12 can help the nutrient solution on the filter screen 10 pass through it more effectively, the suction may also cause impurities to further enter the filter holes and become stuck, making subsequent cleaning difficult. Therefore, as the first sieve plate 14 and the second sieve plate 16 move downwards, they drive the pulling component to work. The pulling component drives the slide rod 24 upwards, which in turn pushes the filter screen 10 upwards. This causes the filter screen 10 to carry impurities upwards above the surface of the nutrient solution. On the one hand, this helps prevent impurities on the filter screen 10 from being sucked into the filter holes and becoming stuck when suction is generated. On the other hand, after the filter screen 10 carries the impurities upwards above the surface of the nutrient solution, the nutrient solution can flow more smoothly and quickly into the circulation tank 2 for collection.

[0047] As a further embodiment of the present invention, the pulling assembly includes a slider 26, a pulley 27 and a clearance groove 28. The slider 26 is fixedly connected to the slide rod 24 and is slidably connected to the inside of the slide groove 25. The pulley 27 is fixedly installed on the outer wall of the top cylinder 23. The slider 26 is connected to the second sieve plate 16 by a pull rope 36 wound on the pulley 27. The clearance groove 28 is opened at the top of the hanging cylinder 8.

[0048] It should be understood that when the second sieve plate 16 moves downward, it drives the pull rope 36 to move downward. Under the action of the pulley 27, the pull rope 36 drives the slider 26 to slide upward inside the slide groove 25. The slider 26 drives the slide rod 24 to slide upward, and the slide rod 24 drives the filter screen 10 to slide upward, thereby causing the filter screen 10 to move towards the direction above the nutrient solution surface. At the same time, because the second sieve plate 16 is moving downward at this time, when the second sieve plate 16 deflects under the action of the torsion spring 22, it will drive the pull rope 36 to deflect in the relief groove 28. The pull rope 36 drives the top cylinder 23 and the slide rod 24 to deflect through the pulley 27 and the slider 26, thereby keeping the relative position between the components unchanged. This is conducive to continuously pulling the slide rod 24 upward. In addition, the slide rod 24 will also drive the filter screen 10 to deflect during the deflection process, which is conducive to using the deflection to generate relative displacement between the filter screen 10 and the impurities. Compared with static filtration, this dynamic filtration is more conducive to the nutrient solution being collected through the filter screen 10.

[0049] As a further embodiment of the present invention, a counterweight ring 29 is slidably connected to the outer wall of the top cylinder 23, a pull rod 30 is slidably connected to the top of the counterweight ring 29, the pull rod 30 is fixedly connected to the slider 26, a sleeve rod 31 is fixedly connected to the bottom of the counterweight ring 29, and a baffle plate 37 with the same shape as the outlet 12 is fixedly connected to the bottom end of the sleeve rod 31.

[0050] It should be understood that when the slider 26 moves upward, it will drive the pull rod 30 to move upward. The pull rod 30 will drive the counterweight ring 29 to move. The counterweight ring 29 will drive the baffle plate 37 to move through the sleeve rod 31, thereby releasing the obstruction of the outlet 12. This means that the blockage of the outlet 12 will only begin to be released when the filter screen 10 carries impurities. This helps to prevent impurities from being sucked in when suction is generated because the filter screen 10 is too close to the outlet 12. In addition, the pull rod 30 can slide on the counterweight ring 29 to adapt to the operation of each component. The setting of the counterweight block helps the components return to their original position for easy use next time.

[0051] As a further embodiment of the present invention, a cleaning block 32 is fixedly installed at the bottom of the baffle plate 37, and the shape of the cleaning block 32 is the same as that of the outlet 12.

[0052] It should be understood that by setting the cleaning block 32, it is helpful to clean the impurities in the outlet 12 that have not been sucked away by the suction force, so that the cleaning block 32 can enter the interior of the outlet 12 after returning to its original position, thereby helping to maintain the flowability of the outlet 12.

[0053] As a further embodiment of the present invention, the circulation assembly includes a circulation pump 33, which is fixedly installed on the side wall of the circulation tank 2. The water inlet end of the circulation pump 33 is fixedly connected to a water inlet pipe 34, and the end of the water inlet pipe 34 is fixedly connected to the circulation tank 2. The water outlet end of the circulation pump 33 is fixedly connected to a water outlet pipe 35, and the end of the water outlet pipe 35 is fixedly connected to the holding cylinder 3.

[0054] Specifically, the circulating pump 33 is started to extract the nutrient solution from the circulating tank 2 through the inlet pipe 34 and deliver it to the container 3 through the outlet pipe 35. The outlet pipe 35 can also be connected to other components to facilitate the collection of the filtered nutrient solution for subsequent processing.

[0055] Working principle of this invention:

[0056] In the process of hydroponic plant care, the plant roots are placed in the holding tube 3 of the hydroponic pot 4, with the roots extending into the holding tube 3 through the through-hole 5. An appropriate amount of nutrient solution is pre-added to the holding tube 3 to provide the necessary nutrients for the plant. After a period of rest, the switch assembly is activated to open the channel, allowing the nutrient solution to flow to the filter assembly. As the nutrient solution passes through the filter assembly, root impurities and other debris are intercepted and accumulate on the filter assembly. However, over time, these accumulated impurities may clog the filter assembly, hindering the normal flow of the nutrient solution. To solve this problem, on the one hand, after the nutrient solution has been filtered, the switch assembly guides the filtered nutrient solution into the circulation tank 2, thereby purifying and temporarily storing the nutrient solution. On the other hand, as the switch assembly moves downwards, it gradually closes the flow channel. This process generates suction, which adsorbs impurities on the filter assembly, helping to maintain the unobstructed flow of the filter assembly and ensuring the smooth flow of the nutrient solution.

[0057] After the nutrient solution has completed filtration and impurity adsorption, the operator removes the impurities collected in the filtration assembly. Once removal is complete, the circulation assembly is activated, transferring the filtered nutrient solution from circulation tank 2 back to the holding container 3, thus achieving nutrient solution recycling. This process not only improves the efficiency of nutrient solution use but also reduces the risk of malfunctions caused by impurities clogging the filtration assembly, contributing to a more stable and efficient growth environment for hydroponic plants.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A filtration device for nutrient solution in hydroponic plants, characterized in that: Includes a connecting frame (1), on which a circulation box (2) is fixedly installed. At least one holding tube (3) is fixedly installed inside the circulation box (2). The holding tube (3) is equipped with a filter assembly inside, which is used to intercept root impurities in the nutrient solution when the nutrient solution needs to be replaced. A water planter (4) is fixedly installed on the top of the holding tube (3). The water planter (4) has a through hole (5) for the roots of hydroponic plants to pass through. An electric push rod (6) is fixedly installed on the bottom wall inside the circulation box (2). The telescopic end of the electric push rod (6) is equipped with a switch assembly. A circulation assembly is provided between the circulation box (2) and the holding tube (3) to transport the filtered nutrient solution back into the holding tube (3). The filter assembly includes a baffle (7) and a hanging cylinder (8). The baffle (7) is fixedly installed on the inner wall of the container (3). A groove (9) is provided on the top of the baffle (7). A filter screen (10) is placed on the top of the container (3). A ring (11) is fixedly connected to the bottom of the filter screen (10). A connecting space is provided between the ring (11) and the groove (9). The hanging cylinder (8) is fixedly installed on the baffle (7), and the top of the hanging cylinder (8) is located in the connecting space. An outlet (12) is provided on the top of the hanging cylinder (8). The switching assembly includes an arc-shaped block (13) and a first sieve plate (14). The first sieve plate (14) is fixedly connected to the telescopic end of the electric push rod (6). Solenoid valves (15) are fixedly installed on the filter holes of the first sieve plate (14). The first sieve plate (14) is located inside the hanging cylinder (8). The top of the first sieve plate (14) is rotatably connected to a second sieve plate (16). A torsion assembly is provided between the first sieve plate (14) and the second sieve plate (16). The arc-shaped block (13) is fixedly installed on the inner top surface of the hanging cylinder (8). The top of the second sieve plate (16) is fixedly connected to a top rod (17). The top rod (17) cooperates with the inclined surface opened on the arc-shaped block (13). A flow channel (18) is opened on the side wall of the hanging cylinder (8). The flow channel (18) is symmetrically opened.

2. The filtration device for hydroponic plant nutrient solution according to claim 1, characterized in that: An intercepting net (19) is fixedly installed inside the diversion channel (18). The filter holes of the intercepting net (19) are smaller than the filter holes of the first sieve plate (14) and the second sieve plate (16).

3. The filtration device for hydroponic plant nutrient solution according to claim 1, characterized in that: The torsion assembly includes a rotating rod (20), which is fixedly connected to the bottom of the second sieve plate (16). One end of the rotating rod (20) passes through the first sieve plate (14) and is fixedly connected to a baffle plate (21). A torsion spring (22) is installed between the baffle plate (21) and the first sieve plate (14), and the torsion spring (22) is sleeved on the outer wall of the rotating rod (20).

4. A filtration device for hydroponic plant nutrient solution according to claim 1, characterized in that: A top cylinder (23) is rotatably connected to the top center of the hanging cylinder (8). A sliding rod (24) is slidably connected inside the top cylinder (23). The top end of the sliding rod (24) is fixedly connected to the filter screen (10). A sliding groove (25) is provided on the outer wall of the top cylinder (23). A pulling component is provided between the sliding rod (24) and the second sieve plate (16).

5. A filtration device for hydroponic plant nutrient solution according to claim 4, characterized in that: The pulling assembly includes a slider (26), a pulley (27) and a clearance groove (28). The slider (26) is fixedly connected to the slide rod (24), and the slider (26) is slidably connected inside the slide groove (25). The pulley (27) is fixedly installed on the outer wall of the top cylinder (23). The slider (26) is connected to the second sieve plate (16) by a pull rope (36) wrapped around the pulley (27). The clearance groove (28) is opened at the top of the hanging cylinder (8).

6. A filtration device for hydroponic plant nutrient solution according to claim 4, characterized in that: A counterweight ring (29) is slidably connected to the outer wall of the top cylinder (23). A pull rod (30) is slidably connected to the top of the counterweight ring (29). The pull rod (30) is fixedly connected to the slider (26). A sleeve rod (31) is fixedly connected to the bottom of the counterweight ring (29). A baffle plate (37) with the same shape as the outlet (12) is fixedly connected to the bottom end of the sleeve rod (31).

7. A filtration device for hydroponic plant nutrient solution according to claim 6, characterized in that: A cleaning block (32) is fixedly installed at the bottom of the baffle (37), and the shape of the cleaning block (32) is the same as that of the outlet (12).

8. A filtration device for hydroponic plant nutrient solution according to claim 1, characterized in that: The circulation assembly includes a circulation pump (33), which is fixedly installed on the side wall of the circulation tank (2). The inlet end of the circulation pump (33) is fixedly connected to an inlet pipe (34), and the end of the inlet pipe (34) is fixedly connected to the circulation tank (2). The outlet end of the circulation pump (33) is fixedly connected to an outlet pipe (35), and the end of the outlet pipe (35) is fixedly connected to a container (3).

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