Surge irrigation and fertigation equipment based on peristaltic pumps
By using a peristaltic pump-based surge irrigation fertigation system, the problem of uneven irrigation has been solved, enabling precise control and intelligent adjustment of irrigation water volume, thereby improving irrigation efficiency and crop yield.
Patent Information
- Application Number
- CN202311067937.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-23
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2043-08-23
AI Technical Summary
Existing irrigation equipment suffers from problems such as uneven irrigation and difficulty in controlling water volume, which prevents irrigation efficiency and crop yield from being improved.
The system employs a peristaltic pump-based surge irrigation and fertigation system. Through the peristaltic pump, irrigation pipeline, measurement sensors, and controller, it achieves precise control of irrigation water volume and surge irrigation mode. Combined with an intelligent control system, it automatically adjusts the irrigation plan.
It enables precise control of irrigation water volume, improves soil moisture uniformity, increases crop survival rate and yield, improves irrigation efficiency, and reduces costs.
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Figure CN116941409B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of integrated water and fertilizer equipment technology, specifically to a surge irrigation integrated water and fertilizer equipment based on a peristaltic pump. Background Technology
[0002] Surge irrigation, also known as intermittent irrigation, uses intermittent valves to supply water to ditches (ridges) intermittently, creating surges in the ditches (ridges) to accelerate the water flow, shorten the time difference between the beginning and end of the ditches (ridges) receiving water, and make the soil evenly moist.
[0003] Existing irrigation equipment has long suffered from many problems, such as uneven irrigation and difficulty in controlling water volume. These problems have prevented irrigation efficiency and crop yield from being improved. Therefore, a new type of automatic and intelligent surge irrigation equipment is needed to improve irrigation efficiency and crop survival rate.
[0004] Therefore, the present invention provides an automatic intelligent surge irrigation device based on a peristaltic pump, which mainly includes: a peristaltic pump, an irrigation pipeline, a measuring sensor, a controller, and a surge device. Summary of the Invention
[0005] (a) Technical problems to be solved
[0006] To address the shortcomings of existing technologies, this invention provides a surge irrigation and fertigation system based on a peristaltic pump. This system enables more precise control of irrigation water volume, and by employing surge irrigation, it ensures thorough soil irrigation, improving crop survival rates and yields. The intelligent control system automatically adjusts the irrigation plan, further enhancing irrigation efficiency. Furthermore, this equipment boasts advantages such as low cost and ease of use, demonstrating promising application prospects.
[0007] (II) Technical Solution
[0008] To achieve the above objectives, the present invention is implemented through the following technical solution: a peristaltic pump-based surge irrigation and fertigation device, comprising a peristaltic pump, an irrigation pipeline, a measuring sensor, a controller, and a surge device. The peristaltic pump is connected to the controller, the measuring sensor monitors the condition of the irrigated land, and the controller controls the pumping of the peristaltic pump accordingly. The peristaltic pump delivers water to the surge device through the irrigation pipeline, and the surge device creates a surge effect for irrigation.
[0009] Preferably, the peristaltic pump is connected to a controller, and the controller controls the peristaltic pump, adjusting the pumping time and pumping volume accordingly.
[0010] Preferably, the measuring sensor is installed on the irrigated land to monitor relevant data such as soil moisture, soil temperature, meteorological conditions, and salinity.
[0011] Preferably, the controller automatically adjusts the water output of the peristaltic pump according to the monitoring data provided by the measuring sensor, and controls the surge interval time of the surge device.
[0012] Preferably, the surge device includes a surge tank and an intermittent valve. The surge tank is fixedly connected to the end of the irrigation pipeline, and the intermittent valve is fixedly installed on the side of the irrigation pipeline connected to the surge tank.
[0013] Preferably, the intermittent valve is opened and closed according to the control requirements of the controller, so that the water level in the surge tank is maintained at a certain height.
[0014] Preferably, a mounting ring is fixedly connected to the side of the measuring sensor, and the measuring sensor is mounted on a mounting iron rod through the mounting ring for fixed installation.
[0015] Preferably, the surge device further includes a surge plate, which is slidably disposed inside the surge tank. The surge plate moves within the surge tank under the control of a controller, thereby generating a stable surge effect in the water within the surge tank.
[0016] Preferably, the surge device further includes a water level control device, which is installed in the surge tank to control the water level in the surge tank during irrigation and to provide feedback to the controller to control the intermittent valve when the water level is insufficient, thereby realizing automatic water supply.
[0017] Preferably, the irrigation pipeline includes an inlet pipe, a delivery pipe, and a filter box. The inlet pipe is located at the clean water end of the peristaltic pump, the delivery pipe connects the peristaltic pump and the surge device, and the end of the inlet pipe is equipped with a filter box.
[0018] This invention discloses a surge irrigation and fertigation device based on a peristaltic pump, which has the following beneficial effects:
[0019] 1. This peristaltic pump-based surge irrigation and fertigation system uses sensors to monitor the soil environment and activate the controller accordingly. The controller then controls the water delivery of the peristaltic pump, and the surge device generates a surge water flow, enabling more precise control of irrigation water volume. Simultaneously, by employing surge irrigation, the soil is fully irrigated, improving crop survival rate and yield. The intelligent control system automatically adjusts the irrigation plan, further enhancing irrigation efficiency. A water level control device within the surge device better controls the surge height, preventing excessive impact on plants and increasing plant survival rate. Furthermore, this equipment boasts advantages such as low cost and ease of use, demonstrating promising application prospects.
[0020] 2. This surge irrigation and fertigation equipment based on a peristaltic pump utilizes a peristaltic pump, which is a water pump based on the principle of peristalsis. Its pump output can be automatically adjusted according to actual needs and can be connected to a controller for irrigation control, achieving precise flow control and making the irrigation water more uniform and accurate. At the same time, due to the advantages of peristaltic pumps such as high reliability and long service life, this equipment can also save energy and reduce maintenance costs during irrigation.
[0021] 3. This peristaltic pump-based surge irrigation and fertigation system utilizes a controller as its core component. This controller automatically coordinates the operation of all components, achieving effective irrigation level control and automated, intelligent irrigation. Furthermore, the controller's intelligent operation significantly improves the efficiency of the irrigation system and crop yield, making it highly valuable for widespread application.
[0022] 4. This peristaltic pump-based surge irrigation and fertigation system includes an intermittent valve and irrigation pipeline. It provides intermittent water supply to furrows (ridges), creating a surge effect that evenly moistens the soil. Surge irrigation solves the problem of uneven irrigation in traditional methods, thus improving irrigation efficiency and crop yield. The intermittent valve controls the interval between surges, enabling intelligent automatic control. The intermittent valve, installed in the surge irrigation pipeline, controls the flow of water. During surge irrigation, water is injected into the pipeline at regular intervals. Once the surge reaches a certain height, the water flow quickly stops under the action of the intermittent valve, awaiting the next injection. The main function of the intermittent valve is to control the timing and intensity of surge irrigation, achieving precise control and water conservation. Each component of the surge irrigation system plays an indispensable role; through their organic combination and cooperation, automatic and intelligent surge irrigation is achieved, improving irrigation efficiency and crop survival rate. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0025] Figure 2 This is a schematic diagram of the irrigation pipeline and surge device structure of the present invention;
[0026] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle;
[0027] Figure 4 This is an enlarged schematic diagram of the measurement sensor structure of the present invention;
[0028] Figure 5 This is a flowchart illustrating the control and hierarchical control processes between the components of this invention.
[0029] In the diagram: 1. Peristaltic pump; 2. Irrigation pipeline; 201. Inlet pipe; 202. Water delivery pipe; 203. Filter box; 3. Measuring sensor; 4. Controller; 5. Surge device; 501. Surge water tank; 502. Intermittent valve; 503. Surge plate; 504. Water level control device; 6. Mounting ring; 7. Mounting rod. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0031] This invention discloses a surge irrigation and fertigation device based on a peristaltic pump;
[0032] According to the appendix Figure 1 As shown, it includes a peristaltic pump 1, an irrigation pipeline 2, a measuring sensor 3, a controller 4, and a surge device 5. The peristaltic pump 1 and the controller 4 transmit data to the measuring sensor 3 through the controller 4. Water is transported to the surge device 5 through the irrigation pipeline 2 to create a surge effect for irrigation.
[0033] The peristaltic pump 1 is a water pump based on the peristaltic principle. Its working principle is to use a special pump head to clamp the pipe in the pipeline and generate peristalsis, thereby compressing and propelling the water flow to the outlet. Its pump output can be automatically adjusted according to actual needs, and it can be connected to the controller 4 for irrigation control.
[0034] In this automatic intelligent surge irrigation equipment, the peristaltic pump 1 is mainly used to push the irrigation water source and achieve precise flow control, making the irrigation water volume more uniform and accurate. At the same time, since the peristaltic pump 1 has the advantages of high reliability and long service life, the equipment can also play a role in saving energy and reducing maintenance costs during the irrigation process.
[0035] The specific installation and operation of the peristaltic pump 1 mainly involves correctly installing the pump head and connecting it to the power supply. During actual use, the peristaltic pump 1 will automatically operate during irrigation, adjusting the flow rate according to the instructions of the controller 4 to ensure irrigation accuracy and water conservation. During operation, attention should be paid to cleaning and maintaining the pump head to ensure its normal operation and service life.
[0036] According to the appendix Figure 2-4 As shown, the peristaltic pump 1 is connected to the controller 4. The controller 4 controls the peristaltic pump 1 and adjusts the pumping time and pumping volume of the peristaltic pump 1 accordingly.
[0037] The measuring sensor 3 is set on the irrigated land to monitor relevant data such as soil moisture, soil temperature, meteorological conditions, and salinity. According to the soil conditions, the measuring sensor 3 can transmit relevant information to the controller 4 and convert it into rhythm control of the peristaltic pump 1 and the surge device 5.
[0038] Soil moisture monitoring: Soil moisture is monitored using measuring sensor 3, and the water output of peristaltic pump 1 is adjusted by controller 4 to ensure that the soil moisture is within the range most suitable for plant growth.
[0039] Meteorological conditions monitoring: By monitoring meteorological conditions such as air temperature, humidity, and sunshine through sensors, feedback and control can be provided to controller 4, thereby enabling intelligent irrigation control. The specific method for feedback and control of controller 4 to achieve intelligent irrigation will be explained below.
[0040] The monitored meteorological conditions can be fed back to the controller 4, which can then intelligently control irrigation based on these conditions. For example, it can automatically increase the amount of irrigation water when the weather is dry and reduce the number of irrigations when the temperature is high. At the same time, through data analysis and processing, the crop growth environment can be dynamically adjusted and optimized to maximize the survival rate and yield of crops. This helps the controller 4 achieve intelligent irrigation control, improve irrigation efficiency and crop yield.
[0041] The controller 4 automatically adjusts the water output of the peristaltic pump 1 and controls the surge interval of the surge device 5 based on the monitoring data provided by the measuring sensor 3.
[0042] Its specific functions are as follows:
[0043] (1) Adjusting irrigation water volume: By monitoring soil moisture through the measuring sensor 3, the controller 4 can automatically adjust the output water volume of the peristaltic pump 1 and irrigate in a timely manner according to irrigation needs, thereby ensuring that the soil moisture is within the range most suitable for plant growth and preventing over-irrigation from causing waste and environmental burden.
[0044] (2) Controlling the intensity and interval of surge irrigation: Controller 4 can also adjust the intensity and interval of surge irrigation according to user needs to achieve flexible irrigation schemes. The process by which controller 4 controls the intensity and interval of surge irrigation is as follows:
[0045] Sensing environmental data: Controller 4 needs to sense environmental data related to surge irrigation, such as soil moisture, air temperature, humidity, wind speed, etc. This environmental data can be acquired through sensors.
[0046] Analyzing environmental data: Controller 4 analyzes the collected environmental data. For example, it monitors soil moisture; if the soil moisture falls below a set threshold, controller 4 needs to activate the surge irrigation system.
[0047] Determining Intensity and Interval: Based on user needs, controller 4 needs to adjust the intensity and interval of surge irrigation. For example, if the user wants to reduce the number of waterings at night, controller 4 needs to increase the water volume and interval; if the user needs to increase the irrigation flow rate, controller 4 needs to adjust the power and water flow rate.
[0048] Sending signals to actual operation: Controller 4 sends commands to the surge irrigation system to control the intensity and interval of surge irrigation. In actual operation, this process can be controlled by opening and closing valves to control the intensity and interval of surge irrigation. These valves are typically installed on the main pipeline or branch pipes of the irrigation system to control parameters such as flow rate and pressure.
[0049] In a surge irrigation system, each drainage pipe is equipped with a valve and a controller 4 to control the opening and closing of the valve, thereby controlling the intensity and interval of surge irrigation. Typically, these valves are centrally located in the irrigation system's control box, but they can also be installed individually at the edge of the irrigation system for easy maintenance and operation.
[0050] Monitoring and feedback data: Controller 4 also needs to monitor the irrigation effect, such as whether the soil moisture reaches the expected target. If the irrigation effect is not ideal, controller 4 needs to readjust the intensity and interval of the surge irrigation until the expected result is achieved.
[0051] Therefore, the intensity and interval of surge irrigation need to be sensed by the controller 4 in real time, adjusted according to user needs, and then controlled by sending signals to control the intensity and interval of surge irrigation. Finally, the controller monitors feedback data to continuously optimize the irrigation effect.
[0052] The controller 4 interacts with the measuring sensor 3, the peristaltic pump 1, and the surge device 5 to achieve automated surge irrigation operation. During operation, the controller 4 processes and analyzes the data collected by the measuring sensor 3, and controls the peristaltic pump 1 and the surge device 5 according to the actual situation to achieve efficient and accurate irrigation.
[0053] In summary, controller 4, as the core control component of the automatic intelligent surge irrigation equipment based on peristaltic pump 1, can automatically coordinate the operation of various components to achieve effective irrigation level control and automated intelligent irrigation operation. At the same time, the intelligent operation of controller 4 greatly improves the efficiency of the irrigation system and crop yield, making it highly valuable for widespread application.
[0054] The surge device 5 includes a surge tank 501 and an intermittent valve 502. The surge tank 501 is fixedly connected to the end of the irrigation pipe 2, and the intermittent valve 502 is fixedly installed on the side of the irrigation pipe 2 connected to the surge tank 501.
[0055] The intermittent valve 502 is opened and closed according to the control needs of the controller 4, so that the water level in the surge tank 501 is maintained at a certain height.
[0056] A mounting ring 6 is fixedly connected to the side of the measuring sensor 3, and a mounting iron rod 7 is provided on the measuring sensor 3 through the mounting ring 6, so as to fix the measuring sensor 3 in place.
[0057] The surge device 5 also includes a surge plate 503, which is slidably disposed inside the surge water tank 501. The surge plate 503 moves in the surge water tank 501 under the control of the controller 4, so that the water in the surge water tank 501 produces a stable surge effect.
[0058] The surge device 5 also includes a water level control device 504, which is installed in the surge water tank 501 to control the water level in the surge water tank 501 during irrigation. When the water level is insufficient, the device feeds back to the controller 4 to control the intermittent valve 502, thereby realizing automatic water supply.
[0059] The surge device 5 includes an intermittent valve 502 and an irrigation pipeline 2, which can intermittently supply water in the furrows (ridges) to generate a surge effect, ensuring uniform soil wetting. Surge irrigation can solve problems such as uneven irrigation in traditional irrigation methods, thereby improving irrigation efficiency and crop yield. The intermittent valve 502 controls the interval time of the surge, thus helping the controller 4 achieve intelligent automatic control.
[0060] (1) Intermittent valve 502 is a device installed in the surge irrigation pipeline 2 to control the interruption of water flow. During surge irrigation, water is injected into the surge irrigation pipeline 2 at certain time intervals. This allows the water flow to stop quickly under the action of intermittent valve 502 after the waves reach a certain height, waiting for the next water injection.
[0061] (2) The main function of the intermittent valve 502 is to control the timing and intensity of surge irrigation, so as to achieve precise control of irrigation and save water resources.
[0062] (2) Irrigation pipeline 2 is the medium that transports water from peristaltic pump 1 to surge irrigation device. Since surge irrigation requires water to be transmitted through the pipeline by wave motion, this pipeline needs to have the following characteristics: ① smooth water flow and low resistance; ② high pressure resistance and able to withstand a certain degree of water pressure; ③ strong corrosion resistance and unaffected by irrigation water quality; ④ long service life and able to withstand long-term vibration and use.
[0063] Therefore, the irrigation pipe 2 in the surge irrigation equipment is generally made of materials such as PVC, PE, PP, and ABS to ensure the stability of the pipe and the smoothness and stability of the water flow. The length and diameter are reasonably designed according to the requirements to ensure the effect of surge irrigation and the reliability of the equipment.
[0064] In summary, each component of the surge irrigation system plays an indispensable role in the overall system. Through their organic combination and cooperation, automatic and intelligent surge irrigation can be achieved, improving irrigation efficiency and crop survival rate.
[0065] The irrigation pipeline 2 includes an inlet pipe 201, a delivery pipe 202, and a filter box 203. The inlet pipe 201 is located at the clean water end of the peristaltic pump 1, the delivery pipe 202 connects the peristaltic pump 1 and the surge device 5, and the filter box 203 is located at the end of the inlet pipe 201.
[0066] (1) Irrigation pipeline 2 is an important component of this equipment, mainly responsible for delivering the irrigation water pushed by peristaltic pump 1 to surge device 5, thereby realizing the irrigation of crops. Compared with peristaltic pump 1 and surge device 5, the function of irrigation pipeline 2 has some overlap. However, as the conveying medium for surge irrigation, the performance and requirements of irrigation pipeline 2 are quite different from the other two parts, so its role in the whole equipment is relatively independent.
[0067] (2) Specifically, irrigation pipeline 2 needs to have the following performance and characteristics:
[0068] Pressure resistance: Irrigation pipe 2 needs to be able to withstand a certain level of water pressure and will not rupture or leak due to excessive water pressure during operation.
[0069] Corrosion resistance: Irrigation water usually contains certain chemicals or microorganisms, which can easily damage the surface of the pipe. Therefore, it needs to have good corrosion resistance to ensure that corrosion or root knots will not occur during long-term operation.
[0070] Connection performance: Irrigation pipe 2 needs to be able to connect with pipes of different materials or specifications, and the connection should be tight and sealed to avoid leakage or reduce water flow resistance.
[0071] It should be noted that while the irrigation pipeline 2 has the same function as the peristaltic pump 1 and the surge device 5, their roles in surge irrigation are different. The peristaltic pump 1 is mainly responsible for pushing the irrigation water source and achieving precise flow control, while the surge device 5 is mainly responsible for generating the surge trough effect to create excellent irrigation conditions.
[0072] Irrigation pipe 2 is the medium for transporting water between the two, responsible for transporting water from peristaltic pump 1 to surge device 5 to ensure its normal operation. Therefore, its function is to connect and transmit water, and it is relatively independent.
[0073] Therefore, the irrigation pipeline 2, as a key component of the automatic intelligent surge irrigation equipment based on the peristaltic pump 1, mainly serves to transport water from the peristaltic pump 1 to the surge device 5.
[0074] An automatic intelligent surge irrigation device based on a peristaltic pump 1 includes: a peristaltic pump 1, an irrigation pipeline 2, a measuring sensor 3, a controller 4, and a surge device 5. The peristaltic pump 1 can automatically adjust the pump output and is connected to the controller 4. The measuring sensor 3 can monitor relevant data such as soil moisture, meteorological conditions, soil temperature, and salinity, and transmit the data to the controller 4.
[0075] The controller 4 can automatically adjust the water output of the peristaltic pump 1 based on the data provided by the measuring sensor 3, and control the surge interval and surge intensity of the surge device 5. In addition, the controller 4 can also adjust parameters such as the irrigation intensity and irrigation interval of surge irrigation according to user needs, so as to realize flexible irrigation schemes.
[0076] The surge irrigation device includes an intermittent valve 502, a surge plate 503, and a water level control device 504. It can supply water intermittently in ditches (ridges) to produce a more stable surge effect, making irrigation more uniform. At the same time, the water level control device 504 can automatically stop water supply when the water level is insufficient, preventing waste and water resource waste.
[0077] Furthermore, surge irrigation equipment can be remotely controlled and can upload irrigation-related data to the cloud for analysis and processing, enabling more intelligent and efficient irrigation management. At the same time, the equipment is easy to use, low in cost, and highly practical and economical.
[0078] 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 illustrative of the 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 present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A peristaltic pump-based wave surge irrigation water and fertilizer integrated device, characterized in that: The irrigation device comprises a peristaltic pump (1), an irrigation pipeline (2), a measuring sensor (3), a controller (4) and a wave surge device (5), the peristaltic pump (1) is connected with the controller (4), the irrigation land state is monitored through the measuring sensor (3), the water pumping of the peristaltic pump (1) is controlled through the controller (4), the peristaltic pump (1) delivers water to the wave surge device (5) through the irrigation pipeline (2), and the water flow with the wave surge effect generated by the wave surge device (5) is used for irrigation. The peristaltic pump (1) is connected with the controller (4), the peristaltic pump (1) is controlled through the controller (4), and the pumping time and the pumping water volume of the peristaltic pump (1) are adjusted correspondingly. The measuring sensor (3) is arranged on the irrigation land and is used for monitoring the soil humidity, the soil temperature, the weather condition and the salinity. The controller (4) automatically adjusts the water volume output by the peristaltic pump (1) and controls the wave surge intermittent time of the wave surge device (5) according to the monitoring data provided by the measuring sensor (3). The wave surge device (5) comprises a wave surge water tank (501) and an intermittent valve (502), the wave surge water tank (501) is fixedly connected with the end of the irrigation pipeline (2), and the intermittent valve (502) is fixedly arranged on the side of the irrigation pipeline (2) connected with the wave surge water tank (501). The intermittent valve (502) is controlled to be opened and closed according to the control requirement of the controller (4), so that the water level in the wave surge water tank (501) is maintained near a certain height. The wave surge device (5) further comprises a wave surge plate (503), the wave surge plate (503) is slidably arranged on the inner side of the wave surge water tank (501), and the wave surge plate (503) is controlled to move in the wave surge water tank (501) through the controller (4), so that the water in the wave surge water tank (501) generates a stable wave surge effect.
2. The peristaltic pump-based wave surge irrigation water and fertilizer integrated device according to claim 1, characterized in that: The measuring sensor (3) is fixedly connected with a mounting ring (6), and the measuring sensor (3) is provided with a mounting iron rod (7) through the mounting ring (6), and the measuring sensor (3) is fixedly mounted through the mounting iron rod (7).
3. The peristaltic pump-based wave surge irrigation water and fertilizer integrated device according to claim 1, characterized in that: The wave surge device (5) further comprises a water level control device (504), the water level control device (504) is arranged in the wave surge water tank (501) and is used for controlling the water level in the wave surge water tank (501) during irrigation, and feeds back the controller (4) to control the intermittent valve (502) when the water level is insufficient, so that automatic water supply is realized.
4. The peristaltic pump-based wave surge irrigation water and fertilizer integrated device according to claim 1, characterized in that: The irrigation pipeline (2) comprises a water inlet pipe (201), a water delivery pipe (202) and a filter box (203), the water inlet pipe (201) is arranged at the clean water end of the peristaltic pump (1), the water delivery pipe (202) is connected with the peristaltic pump (1) and the wave surge device (5), and the end of the water inlet pipe (201) is provided with the filter box (203).
Citation Information
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