Soil drying air injection system and method based on solar driving

Abstract

The invention discloses a soil dry air injection system and method based on solar driving, and belongs to the technical field of agricultural soil improvement and environment regulation and control. The soil drying air injection system based on solar driving comprises a solar power supply unit, an air compression unit, an air drying unit, a soil air injection unit and an intelligent control unit, the five core units cooperate with one another, and effective regulation and control of soil humidity are achieved. Dry air is injected into the soil, the soil humidity is effectively reduced, the physical property of the soil is improved, a good soil environment is created for crop growth, and meanwhile sustainable utilization of energy and intelligent control of the system are achieved. The invention relates to a soil dry air injection system and method based on solar driving, which are used for reducing soil humidity, improving soil air permeability and promoting crop growth.

Description

Technical Field

[0001] The present invention relates to an air injection system and method, and particularly to a solar-driven soil drying air injection system and method, belonging to the technical field of agricultural soil improvement and environmental regulation. Background Art

[0002] In agricultural production, landscape maintenance, and some engineering constructions, excessive soil moisture often brings many problems. For example, in agriculture, excessive soil moisture may cause crop roots to lack oxygen, leading to diseases such as root rot, affecting the growth and development of crops, and reducing yield and quality; in landscape, soil with excessive moisture may be unfavorable for the growth of some flowers and lawn plants, and even cause plant death; in the field of engineering construction, such as building foundations and road subgrades, if the soil moisture exceeds the standard, it will affect the stability of the foundation and the engineering quality.

[0003] Currently, the methods for reducing soil moisture mainly include natural drying, trench drainage, and using chemical desiccants. However, natural drying is restricted by weather conditions and has low efficiency; trench drainage is difficult to implement in some complex terrains or limited sites; chemical desiccants may pollute the soil environment and affect the soil ecological balance. Therefore, there is an urgent need for a simple, practical, low-cost device that can effectively reduce soil moisture to solve the above problems.

[0004] With the development of energy technology and automatic control technology, devices driven by clean energy such as solar energy are increasingly widely used in the agricultural field. Therefore, it is necessary to develop an efficient, energy-saving, environmentally friendly, and intelligent soil moisture regulation system and method to overcome the deficiencies of the existing technology and meet the needs of modern agricultural production. Summary of the Invention

[0005] The present invention aims to solve the problems of reducing soil moisture, improving soil aeration, and promoting crop growth, and further proposes a solar-driven soil drying air injection system and method to effectively regulate soil moisture.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A solar-driven soil drying air injection system, the solar-driven soil drying air injection system comprising:

[0008] A solar power supply unit, the solar power supply unit comprising a solar panel array, a photovoltaic controller, and a battery pack, for converting solar energy into electrical energy to provide power for the system;

[0009] An air compression unit, which includes an air compressor and an air filter, is used to compress the outside air, filter out dust and impurities in the air at the same time, and then transport the compressed air to the air drying unit;

[0010] An air drying unit, which is an adsorption dryer, is used to adsorb and remove moisture in the compressed air, ensure the output air is dry, and conduct drying treatment on the compressed air;

[0011] A soil air injection unit, which includes an injection pipe network and injection nozzles, is used to evenly inject the dried air into the soil;

[0012] An intelligent control unit, which includes a soil humidity sensor array, a controller and a wireless communication module, is used to monitor the soil humidity in real time and automatically regulate the system operation.

[0013] Furthermore, the solar panel array of the solar power supply unit is composed of multiple monocrystalline silicon solar panels, and the installation angle and direction of the solar panel array can be adjusted according to the geographical location and sunshine conditions.

[0014] Furthermore, the air compressor of the air compression unit is a piston compressor, and the piston compressor is driven by the solar power supply unit.

[0015] Furthermore, the air filter of the air compression unit adopts a multi-stage filtration method and is installed at the air inlet of the air compressor and the air outlet of the air drying unit.

[0016] Furthermore, the adsorption dryer of the air drying unit includes two adsorption towers, which are arranged side by side and parallel. One is used to adsorb moisture in the air, and the other is used to regenerate the adsorbent.

[0017] Furthermore, the injection pipe network of the soil air injection unit is made of plastic or metal pipes, includes a main pipeline and branch pipelines. The branch pipelines are communicated with the main pipeline. The other side of the main pipeline is connected to the air outlet of the air drying unit, and the other side of the branch pipelines is connected to multiple injection nozzles.

[0018] Furthermore, the injection nozzle includes a cylindrical section and a conical section connected in sequence from top to bottom. A control valve is installed on the cylindrical section, and multiple injection holes are opened on the cylindrical section between the control valve and the conical section.

[0019] Furthermore, the sensors of the soil humidity sensor array of the intelligent control unit are capacitive or time domain reflectometry sensors. The signal output of the soil humidity sensor array is connected to the controller, and the soil humidity sensor array is distributed at different depths and positions in the soil.

[0020] Furthermore, the controller is a programmable logic controller or a microprocessor, and the wireless communication module is integrally installed in the controller.

[0021] Furthermore, the wireless communication module is communicatively connected to a remote data receiving device.

[0022] A solar-driven soil drying air injection method, the solar-driven soil drying air injection method is implemented through the following steps:

[0023] S1: Convert solar energy into electrical energy through a solar power supply unit and supply power to the system;

[0024] S2: Compress the outside air by using an air compression unit, filter out dust and impurities in the air at the same time, and then transport the compressed air to an air drying unit;

[0025] S3: Remove the moisture in the compressed air obtained in S2 through an air drying unit to dry the compressed air;

[0026] S4: Inject the dried air obtained in S3 into the soil evenly through a soil air injection unit;

[0027] S5: Real-time monitor the soil humidity through an intelligent control unit and automatically regulate the operation of the system.

[0028] The beneficial effects of the present invention are:

[0029] 1. Injecting dry air into the soil of the present invention can not only reduce the soil humidity, but also improve the air permeability and structure of the soil. The air flow channels formed by the dry air in the soil help to increase the soil porosity, promote root respiration and nutrient absorption, enhance the activity of soil microorganisms, thereby improving the physical, chemical and biological properties of the soil, creating good soil conditions for crop growth, and improving the soil environment.

[0030] 2. The present invention uses solar energy as the main energy source, does not require an external power supply, reduces the operating cost of the system, reduces the dependence on traditional energy sources, and is energy-efficient. Solar energy is a clean energy source, pollution-free and renewable, meeting the requirements of sustainable development. Under sufficient sunlight, the system can be self-sufficient and operate stably, effectively reducing the soil humidity and improving the soil air permeability.

[0031] 3. Through the humidity sensor array distributed in the soil and the intelligent control unit, the present invention realizes the real-time monitoring and precise regulation of soil humidity. The system can automatically adjust the air injection volume and time according to the actual changes in soil humidity, ensuring that the soil humidity always remains within the range suitable for crop growth, avoiding problems such as excessive humidity, and improving the growth quality and yield of crops.

[0032] 4. The present invention enables the system to have a remote monitoring function through the wireless communication module. Users can view the soil humidity data and the system operation status at any time and place through mobile phones or computers, and perform remote control operations. This intelligent monitoring method facilitates users to promptly grasp the changes in soil humidity, adjust the regulation strategy according to actual needs, and improve the management efficiency and convenience.

[0033] 5. The structural design of each component unit of the system of the present invention is reasonable, with a high degree of modularization, and is easy to install and maintain. The solar power supply unit, air compression and drying unit, and soil air injection unit are relatively independent, facilitating fault detection and repair. At the same time, during the operation of the system, a large amount of manual intervention is not required, reducing the labor intensity and maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is the overall structural schematic diagram of an embodiment of the solar-powered soil dry air injection system of the present invention;

[0035] Figure 2 is the structural schematic diagram of an embodiment of the solar power supply unit of the present invention;

[0036] Figure 3 is the structural schematic diagram of an embodiment inside the air compression unit of the present invention;

[0037] Figure 4 is the structural schematic diagram of an embodiment of the air drying unit of the present invention;

[0038] Figure 5 is the structural schematic diagram of an embodiment of the soil air injection unit of the present invention;

[0039] Figure 6 is the structural schematic diagram of an embodiment of the air injection nozzle of the present invention;

[0040] Figure 7 is the structural schematic diagram of an embodiment of the intelligent control unit of the present invention.

[0041] In the figure: 1. Solar power supply unit; 101. Solar panel array; 102. Photoelectric controller; 103. Battery pack; 104. Electric wire; 2. Air compression unit; 201. Motor; 202. Connecting rod; 203. Piston; 204. Cylinder; 205. Air compression inlet pipe; 206. Air compression outlet pipe; 3. Air drying unit; 301. Air drying inlet pipe; 302. First adsorption tower; 303. Second adsorption tower; 304. Air drying outlet pipe; 4. Air injection unit; 401. Main pipeline; 402. Main pipeline control valve; 403. Branch pipeline; 404. Branch pipeline control valve; 405. Air injection nozzle; 406. Air injection nozzle control valve; 407. Air injection hole; 5. Intelligent control unit; 501. Controller; 502. Wireless communication module; 503. Soil humidity sensor array. Detailed implementation mode

[0042] In the description of the present invention, it should be noted that all directional indications (such as up, down, etc.) are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0043] Detailed implementation mode one: Combine Figures 1-7 To illustrate this implementation mode, as Figure 1 shown, the solar-driven soil drying air injection system described in this implementation mode includes: a solar power supply unit 1, an air compression unit 2, an air drying unit 3, a soil air injection unit 4, and an intelligent control unit 5. The five core units cooperate with each other to effectively regulate the soil humidity. By injecting dry air into the soil, the soil humidity can be effectively reduced, the physical properties of the soil can be improved, a good soil environment can be created for crop growth, and at the same time, the sustainable utilization of energy and the intelligent control of the system can be realized.

[0044] As Figure 2As shown, the solar power supply unit 1 includes a solar panel array 101, a photovoltaic controller 102, and a battery pack 103, which is used to convert solar energy into electrical energy to provide power for the system. Preferably, the solar power supply unit 1 converts solar energy into electrical energy and provides power support for other units through the wire 104. Among them, the solar panel array 101 is composed of multiple high-efficiency monocrystalline silicon solar panels, and the array scale can be flexibly adjusted according to actual application requirements. The photoelectric conversion efficiency of the solar panels is high, which can convert solar energy into electrical energy and provide stable power support for the entire system. Its installation angle and direction can be optimized and adjusted according to the local geographical location and sunshine conditions to improve the capture efficiency of solar energy. The photovoltaic controller 102 is responsible for managing the charging process of the battery pack 103 by the solar panels, preventing overcharging and over-discharging phenomena, and prolonging the service life of the battery. It can real-time monitor the power status of the battery and automatically adjust the charging current and voltage according to needs to ensure the safety and efficiency of the charging process. The battery pack 103 uses deep-cycle lead-acid batteries or lithium-ion battery packs 103 as the energy storage unit of the system, which is used to store electrical energy and supply power when there is no sunshine. The capacity of the battery pack 103 is designed according to the energy consumption requirements of the system and the local sunshine conditions to ensure that the system can still operate continuously for a certain period of time in the case of no sunshine or insufficient sunshine to meet the requirements of soil moisture regulation.

[0045] As Figure 3 shown, the air compression unit 2 includes an air compressor and an air filter, which is used to compress the outside air and filter out dust and impurities in the air at the same time, and then transport the compressed air to the air drying unit 3. The air compressor selects a low-noise and high-efficiency piston 203 type compressor, which includes a motor 201, a connecting rod 202, a piston 203, a cylinder 204, an air compression inlet pipe 205, an air compression outlet pipe 206, etc. It is driven by the solar power supply unit 1, inhales the outside air and compresses it to a certain pressure, and its displacement and pressure can be selected according to the system design requirements to ensure that it can provide compressed air with sufficient flow and pressure. The air filter adopts a multi-stage filtration method, that is, it includes a variety of different types of filter media, which are arranged in a certain order in the air flow path. For example, it first passes through a coarse-effect metal filter screen to filter out larger dust particles, and then passes through fiber filter paper to further filter smaller particles to ensure the stable operation of the system and the cleanliness of the injected air.

[0046] As Figure 4As shown, the air drying unit 3 is an adsorption dryer, which is used to adsorb and remove the moisture in the compressed air to ensure the dryness of the output air and dry the compressed air. The air drying unit 3 includes an air dryer. In the present invention, an adsorption dryer is adopted. The adsorption dryer includes two adsorption towers, which are arranged side by side and parallel. One is used to adsorb the moisture in the air, and the other is used to regenerate the adsorbent. When the wet air passes through the adsorption tower, the adsorbent will adsorb the moisture in it. When the adsorbent is saturated, it needs to be regenerated. The regeneration process is to pass hot air through the adsorbent to evaporate the adsorbed moisture, so that the adsorbent can be used again for drying to ensure that the dryness of the output air meets the preset requirements.

[0047] The air filter is installed at the air inlet of the air compressor and the air outlet of the air dryer, and is used to filter particulate matters such as dust and impurities in the air to prevent them from entering the system and damaging the equipment or blocking the pipeline. The air outlet of the air compressor is connected to the air inlet of the air dryer.

[0048] As Figure 5 As shown, the soil air injection unit 4 includes an injection pipe network and injection nozzles 405, which are used to evenly inject the dried air into the soil. The injection pipe network of the soil air injection unit 4 is made of plastic or metal pipes, including a main pipeline 401 and branch pipelines 403. The branch pipelines 403 are communicated with the main pipeline 401. The other side of the main pipeline 401 is connected to the air outlet of the air drying unit 3, and the other side of the branch pipelines 403 is connected to a plurality of the injection nozzles 405. The injection pipe network is composed of the main pipeline 401 and the branch pipelines 403, and is made of plastic or metal pipes with corrosion resistance and pressure resistance. The main pipeline 401 transports the dried air from the air compression and drying unit to each injection area, and the branch pipelines 403 evenly distribute the air to each injection point in the soil. The layout of the injection pipe network is designed according to the soil type, crop planting method and humidity control requirements to ensure that the air can be evenly injected into different depths and positions of the soil. Preferably, control valves are provided on the main pipeline 401 and the branch pipelines 403 to facilitate the control of the air flow rate. The main pipeline 401 is the main transmission pipeline in the soil air injection system, and its main function is to transport the dried air from the air compression and drying unit to each injection area. The main pipeline 401 is usually made of plastic or metal pipes with corrosion resistance and pressure resistance to ensure that it can withstand a certain pressure and chemical corrosion during long-term operation. The branch pipelines 403 are the pipelines connecting the main pipeline 401 and the injection nozzles 405, and their main function is to evenly distribute the dried air to each injection point in the soil. The branch pipelines 403 are also made of plastic or metal pipes with corrosion resistance and pressure resistance to ensure stability and reliability during long-term operation.

[0049] As Figure 6 shown, the air injection nozzle 405 includes a cylindrical section and a conical section connected in sequence from top to bottom. A control valve is installed on the cylindrical section to facilitate the control of air flow. A plurality of air injection holes 407 are formed in the cylindrical section between the control valve and the conical section. The air injection nozzle 405 is installed at the end of the branch pipeline 403 and penetrates deep into the soil. The air injection nozzle 405 adopts a porous structure design, which can uniformly release dry air into the soil in the form of fine bubbles, increasing the contact area between air and soil and improving the efficiency of reducing soil humidity. The aperture size, quantity, and distribution density of the air injection nozzle 405 can be adjusted according to soil texture and humidity conditions to achieve the best air injection effect.

[0050] As Figure 7 shown, the intelligent control unit 5 includes a soil humidity sensor array 503, a controller 501, and a wireless communication module 502, which are used to monitor soil humidity in real time and automatically regulate the operation of the system. The sensors of the soil humidity sensor array 503 are capacitive or time-domain reflectometry sensors. The signal output of the soil humidity sensor array 503 is connected to the controller. The signal output of the soil humidity sensor array 503 is connected to the controller 501. The sensors adopt high-precision capacitive or time-domain reflectometry sensors, which can accurately measure the moisture content in the soil and transmit the measurement data to the controller 501. The soil humidity sensor array 503 is distributed at different depths and positions in the soil to monitor the change of soil humidity in real time. The controller 501, as the core control component of the system, receives the signals of the soil humidity sensors and automatically controls the operation of devices such as air compressors, air dryers, and control valves according to preset humidity thresholds and control algorithms. The controller 501 adopts a programmable logic controller (PLC) or a microprocessor, which has data processing, storage, and communication functions, and can realize the intelligent operation and remote monitoring of the system. The wireless communication module 502 is integrated in the controller 501 to realize data transmission between the system and a remote monitoring platform or a user mobile terminal. The wireless communication module 502 is communicatively connected to a remote data receiving device. Users can remotely view soil humidity data, system operation status, and perform parameter setting and remote control operations on the system through a mobile phone APP or computer software, which is convenient for users to grasp the soil humidity situation in real time and adjust the regulation strategy in time.

[0051] A method for injecting dry air into soil driven by solar energy, the method for injecting dry air into soil driven by solar energy is realized through the following steps:

[0052] S1: Convert solar energy into electrical energy through the solar power supply unit 1 and supply power to the system;

[0053] S2: Compress the outside air using the air compression unit 2, filter out the dust and impurities in the air at the same time, and then transport the compressed air to the air drying unit 3;

[0054] S3: Remove the moisture in the compressed air obtained in S2 through the air drying unit 3 to dry the compressed air;

[0055] S4: Inject the dried air obtained in S3 into the soil evenly through the soil air injection unit 4;

[0056] S5: Real-time monitor the soil humidity through the intelligent control unit 5 and automatically regulate the system operation.

[0057] The present invention introduces a pioneering means for regulating soil humidity, that is, by precisely injecting external dry air into the soil interior to reduce humidity. This method breaks through the limitations of traditional methods that only rely on drainage and natural evaporation of moisture. When the soil humidity sensor array 503 detects that the humidity exceeds the appropriate range, the intelligent control unit 5 quickly activates the air compression unit 2 and the air drying unit 3. This unit uses efficient air compression technology to increase the air pressure, and combined with advanced adsorption drying technology, deeply removes moisture to generate extremely dry air. These dry airs penetrate into the pores of each soil layer evenly and stably through the carefully designed air injection pipeline network and the porous air injection nozzle 405 system. Since the humidity of the dry air is much lower than that of the soil, a strong humidity difference driving force is formed, which prompts the soil moisture to quickly migrate, evaporate and be discharged from the soil system towards the air, achieving precise and efficient humidity reduction, creating an ideal water balance environment for crop roots, and effectively avoiding adverse conditions such as hypoxia and disease breeding caused by excessive humidity.

[0058] The operation process is as follows:

[0059] The solar panel array 101 converts solar energy into electrical energy and stores it in the battery pack 103 through the photovoltaic controller 102. When the soil humidity exceeds the preset threshold, the controller starts the air compressor to inhale and compress the outside air. The compressed air enters the air dryer for drying treatment to remove the moisture in it, and then enters the air injection pipeline network after being filtered by the air filter.

[0060] In the air injection pipeline network, the dried air first enters the main pipeline, and then enters the branch pipelines. It is transported to each air injection nozzle 405 through the branch pipelines, and then is evenly injected into the soil in the form of fine air currents through the air injection holes 407 of the air injection nozzle 405. Due to the loosening of the soil, there must be voids in the soil where crops are planted. At this time, the injected air can flow in the soil around the main air pipe. Due to the existence of a humidity difference, the injected dry air contacts the moisture in the soil, and through gas exchange and moisture evaporation, the moisture in the soil is carried out, thereby reducing the soil humidity.

[0061] The soil moisture sensor array 503 monitors the changes in soil moisture in real time and feeds the data back to the controller. The controller automatically adjusts parameters such as the operating frequency of the air compressor, the working state of the air dryer, and the gas injection time and gas injection volume according to the soil moisture data, so as to achieve precise control of the soil moisture.

[0062] Meanwhile, the wireless communication module 502 transmits the system operation data to the remote monitoring platform. Users can remotely monitor the system operation status and perform manual intervention according to actual needs, such as adjusting the humidity threshold, starting or stopping the system operation, etc.

[0063] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes. However, as long as it does not depart from the technical content of the present invention, according to the technical essence of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments within the spirit and principle of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A soil drying air injection system based on solar energy drive, characterized in that: The solar-powered soil drying air injection system comprises: A solar power supply unit, comprising a solar panel array, a photoelectric controller and a battery pack, for converting solar energy into electrical energy to provide power for the system; An air compression unit, comprising an air compressor and an air filter, for compressing external air and filtering out dust and impurities in the air, and then delivering the compressed air to the air drying unit; An air drying unit, which is an adsorption dryer, is used to adsorb and remove moisture from the compressed air to ensure that the output air is dry and to dry the compressed air; A soil air injection unit, comprising an air injection pipe network and an air injection nozzle, for uniformly injecting dried air into the soil; An intelligent control unit includes a soil moisture sensor array, a controller and a wireless communication module, and is used to monitor soil moisture in real time and automatically regulate system operation.

2. The solar-driven soil drying air injection system according to claim 1, characterized in that: The solar panel array of the solar power supply unit is a plurality of monocrystalline silicon solar panels, and the installation angle and direction of the solar panel array can be adjusted according to the geographical location and sunshine conditions.

3. The solar-driven soil drying air injection system according to claim 1, characterized in that: The air compressor of the air compression unit is a piston compressor, and the piston compressor is driven by a solar power supply unit.

4. The solar-driven soil drying air injection system according to claim 3 is characterized in that: The air filter of the air compression unit is a multi-stage filtering method and is installed at the air inlet of the air compressor and the air outlet of the air drying unit.

5. The solar-driven soil drying air injection system according to claim 1, characterized in that: The adsorption dryer of the air drying unit comprises two adsorption towers, which are arranged side by side in parallel, one for adsorbing moisture in the air and the other for regenerating the adsorbent.

6. The solar-powered soil drying air injection system according to claim 1, characterized in that: The air injection pipe network of the soil air injection unit is a plastic or metal pipe, including a main pipe and a branch pipe. The branch pipe is connected to the main pipe, the other side of the main pipe is connected to the air outlet of the air drying unit, and the other side of the branch pipe is connected to the multiple air injection nozzles.

7. The solar-powered soil drying air injection system according to claim 6, characterized in that: The gas injection nozzle comprises a cylindrical section and a conical section connected in sequence from top to bottom, a control valve is installed on the cylindrical section, and a plurality of gas injection holes are opened on the cylindrical section between the control valve and the conical section.

8. The solar-powered soil drying air injection system according to claim 1, characterized in that: The sensors of the soil moisture sensor array of the intelligent control unit are capacitive or time domain reflective sensors, the signal output of the soil moisture sensor array is connected to the controller, and the soil moisture sensor array is distributed at different depths and positions of the soil.

9. The solar-powered soil drying air injection system according to claim 8, characterized in that: The controller is a programmable logic controller or a microprocessor, and the wireless communication module is integrated into the controller.

10. A method for soil drying air injection based on solar energy drive, characterized in that: The soil drying air injection method based on solar energy drive is achieved by the following steps: S1: Convert solar energy into electrical energy through a solar power supply unit and power the system; S2: Use the air compression unit to compress the outside air, filter out dust and impurities in the air, and then transport the compressed air to the air drying unit; S3: drying the compressed air obtained in S2 by removing moisture from the compressed air through an air drying unit; S4: The dried air obtained in S3 is uniformly injected into the soil through a soil air injection unit; S5: The intelligent control unit monitors soil moisture in real time and automatically regulates system operation.

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