阅读说明：本技术 一种低能耗作物蒸散水循环利用系统 (Low-energy-consumption crop evapotranspiration water recycling system ) 是由 陈保青 梅旭荣 董雯怡 严昌荣 龚道枝 满旭伦 于 2021-10-26 设计创作，主要内容包括：本发明公开了一种低能耗作物蒸散水循环利用系统,涉及能源循环利用技术领域,包括栽培空间,栽培空间内栽培有农作物,栽培空间内部设置有循环换热模组和控制模组,循环换热模组包括第一气泵、第二气泵和热交换管,热交换管首端设置有吸湿增长腔,热交换管末端接通栽培空间,吸湿增长腔上设置有雾化器,热交换管包括集水段,集水段填充有仿生集水模块,仿生集水模块表面设置有仿生涂层并且接触集水段内壁,集水段连接有储液池,储液池用于收集集水段内的液态水,储液池内设置有抽水作业模块,抽水作业模块用于将储液池内收集的液态水投入栽培作业中,控制模组包括环境监测模块和控制模块。本发明具有成本低、节能、集水效率高的优点。(The invention discloses a low-energy-consumption crop evapotranspiration water recycling system, which relates to the technical field of energy recycling and comprises a cultivation space, crops are cultivated in the cultivation space, a circulating heat exchange module and a control module are arranged in the cultivation space, the circulating heat exchange module comprises a first air pump, second air pump and hot exchange pipe, hot exchange pipe head end is provided with the moisture absorption growth chamber, hot exchange pipe end switch-on cultivation space, be provided with the atomizer on the moisture absorption growth chamber, hot exchange pipe includes the section of catchmenting, the section of catchmenting is filled there is bionical water collection module, bionical water collection module surface is provided with bionical coating and contacts the section of catchmenting inner wall, the section of catchmenting is connected with the liquid storage tank, the liquid storage tank is used for collecting the liquid water in the section of catchmenting, be provided with the operation module of drawing water in the liquid storage tank, the operation module of drawing water is arranged in throwing into the cultivation operation with the liquid water of collecting in the liquid storage tank, the control module group includes environmental monitoring module and control module. The invention has the advantages of low cost, energy saving and high water collecting efficiency.)

1. A low-energy-consumption crop evapotranspiration water recycling system comprises a cultivation space, crops are cultivated in the cultivation space, and the low-energy-consumption crop evapotranspiration water recycling system is characterized in that a circulating heat exchange module and a control module are arranged in the cultivation space, the circulating heat exchange module comprises a first air pump, a second air pump and a heat exchange pipe buried underground, a moisture absorption lengthening cavity is formed in the head end of the heat exchange pipe, and the tail end of the heat exchange pipe is communicated with the cultivation space; wherein the content of the first and second substances,

the moisture absorption and growth cavity is provided with an atomizer, the heat exchange tube comprises a water collection section, the water collection section is filled with a bionic water collection module which is arranged in the water collection section in a spaced mode, the surface of the bionic water collection module is provided with a bionic coating and contacts the inner wall of the water collection section, the water collection section is connected with a liquid storage tank, the liquid storage tank is used for collecting liquid water in the water collection section, a water pumping operation module is arranged in the liquid storage tank, and the water pumping operation module is used for putting the liquid water collected in the liquid storage tank into cultivation operation;

the control module group includes environmental monitoring module and control module, environmental monitoring module is used for gathering the real-time humidity of cultivation space, control module is used for controlling when real-time humidity is greater than first predetermined threshold value first air pump with the atomizer starts, first air pump be used for after the start will cultivation space inside air suction increases the chamber, the atomizer is used for after the start court the moisture absorption increases intracavity and sprays the salt solution granule, control module still is used for starting the atomizer and opens the second air pump after predetermineeing the time quantum, the second air pump is used for after the start with the moisture absorption increases the hot exchange pipe of chamber inside air suction.

2. The system for recycling crop evapotranspiration water with low energy consumption according to claim 1, wherein the bionic water collection module comprises a plurality of bionic water collection net arrays sequentially arranged along the water collection section, the bionic coating is arranged on the surface of the bionic water collection net arrays, and the peripheries of the bionic water collection net arrays are in contact with the inner wall of the water collection section.

3. The system for recycling the crop evapotranspiration water with low energy consumption according to claim 2, wherein the bionic water collection mesh array comprises a plurality of bionic metal wire meshes and iron wires fixed at the edges of the bionic metal wire meshes, the plurality of bionic metal wire meshes are uniformly distributed on the iron wires, and the bionic coating is arranged on the surfaces of the bionic metal wire meshes.

4. The system for recycling the crop evapotranspiration water with low energy consumption as claimed in claim 3, wherein fixed ends are arranged at two ends of the iron strand, and the fixed ends are fixed in the heat exchange tube respectively through welding.

5. The system for recycling the crop evapotranspiration water with low energy consumption as claimed in claim 3 or 4, wherein the bionic coating is prepared from preset treatment raw materials by a preset treatment method, the preset treatment raw materials are 1H,1H,2H, 2H-heptadecafluorodecyl polysilsesquioxane and polyethyl methacrylate, and the preset treatment method comprises the following steps: mixing two raw materials in the preset treatment raw materials according to the mass ratio of 1: 1, and dissolving the mixture in a fluorine solution at the concentration of 10mg/ml to obtain the fluorine-containing composite material.

6. The system for recycling crop evapotranspiration water with low energy consumption as claimed in claim 1, wherein the atomizer is connected with a saline solution preparation module, the saline solution preparation module is used for preparing a preset proportion of clean water and concentrated fertilizer into saline solution, and the atomizer is used for spraying saline solution particles in the saline solution preparation module towards the moisture absorption growth cavity.

7. The system of claim 6, wherein the concentrated fertilizer comprises any one or more of urea, nitrogen fertilizer in ammonia state, and nitrogen fertilizer in nitrate state.

8. The system for recycling crop evapotranspiration water with low energy consumption according to claim 1, wherein the control module further comprises a liquid level sensor arranged at a preset height in the liquid storage tank, the liquid level sensor is used for acquiring liquid level information after contacting with the liquid level, and the control module is further used for controlling the water pumping operation module to start after receiving the liquid level information.

9. The system of claim 1, wherein the environmental monitoring module comprises a humidity sensor disposed in the cultivation space, the humidity sensor is configured to collect real-time humidity of the cultivation space.

10. The system of claim 9, wherein the environmental monitoring module further comprises a soil temperature sensor for collecting a real-time temperature of soil in the cultivation space, and the control module is configured to control the first air pump and the atomizer to start when the real-time humidity is greater than a first preset threshold and the real-time temperature is less than a second preset threshold.

Technical Field

The invention relates to the technical field of energy recycling, in particular to a low-energy-consumption crop evapotranspiration water recycling system.

Background

The global water resource crisis is a major proposition faced by the human fate community at present, and in global water resource consumption, according to the report of the food and agriculture organization of the united nations, the agricultural water accounts for 70% of the global water resource consumption, so the agricultural water conservation is a necessary way to solve the global water resource. Based on agricultural energy recycling, gaseous water molecules generated by greenhouse plant transpiration are called as evaporated water to be recovered, so that the method has a better prospect, and four main principles are provided: (1) the temperature difference is utilized to drive the gaseous water to be converted into the liquid water, so that the recovery of the evaporated water is realized, for example, an air compressor and a semiconductor are utilized for refrigeration, or the temperature difference between natural air and soil is utilized, and water molecules are converted from the gaseous state to the liquid state under the drive of the temperature difference, so that the recovery of the liquid part is realized; (2) the method mainly uses high-voltage static electricity to ionize air, generates a large amount of free electrons to charge water molecules, the charged water molecules move directionally under the action of an electrostatic field, and then the water molecules are separated from other easily charged electronegative molecules by using the selective permeation action of a polymer fiber membrane on the water molecules, so that the aim of dehumidification is fulfilled; (3) the water absorption characteristic of the desiccant is utilized to drive gaseous water to be absorbed and converted into liquid, such as silica gel, zeolite, metal organic framework compound and the like; (4) the bionic material is used for collecting gaseous water molecules, so that the gaseous water molecules are changed into liquid from gaseous state, and the liquid is directionally moved to form water drops.

Currently, the representative technologies of four technical paths have advantages and defects, wherein a water collecting system driven by air compression, semiconductor refrigeration and high-voltage static electricity has the characteristics of high water collecting efficiency and stable operation, but consumes a large amount of electric power and has high operation cost, and the water collecting system is only used in household and industrial scenes at present; the drying agent is utilized for water collection, although extra energy consumption is not needed, the consumption of the drying agent is large, the drying agent cannot be basically recovered, and the current measures are mostly used in the fields of home furnishing and food preservation; the energy consumption of the refrigeration process is not needed by utilizing the temperature difference between air and soil and the bionic material, the water collecting materials are not needed to be recovered, but the water collecting efficiency is too low, only about 1-10 percent, and the application of the bionic material in the agricultural field is limited by the too low water collecting efficiency. In general, the feasibility of realizing the recycling of the evaporated water in the agricultural field by utilizing the natural temperature difference and the bionic materials is the greatest, but how to improve the water collection efficiency and the energy-saving level is always a technical difficulty in the field.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a low-energy-consumption crop evapotranspiration water recycling system.

A low-energy-consumption crop evapotranspiration water recycling system comprises a cultivation space, crops are cultivated in the cultivation space, and the low-energy-consumption crop evapotranspiration water recycling system is characterized in that a circulating heat exchange module and a control module are arranged in the cultivation space, the circulating heat exchange module comprises a first air pump, a second air pump and a heat exchange pipe buried underground, a moisture absorption lengthening cavity is formed in the head end of the heat exchange pipe, and the tail end of the heat exchange pipe is communicated with the cultivation space; the moisture absorption and growth cavity is provided with an atomizer, the heat exchange tube comprises a water collection section, the water collection section is filled with a bionic water collection module which is arranged in the water collection section in a spaced mode, the surface of the bionic water collection module is provided with a bionic coating and contacts the inner wall of the water collection section, the water collection section is connected with a liquid storage tank, the liquid storage tank is used for collecting liquid water in the water collection section, a water pumping operation module is arranged in the liquid storage tank, and the water pumping operation module is used for putting the liquid water collected in the liquid storage tank into cultivation operation; control module group includes environmental monitoring module and control module, environmental monitoring module is used for gathering the real-time humidity of cultivation space, control module is used for controlling when real-time humidity is greater than first predetermined threshold value first air pump with the atomizer starts, first air pump be used for after the start will cultivation space inside air suction increases the chamber in that absorbs moisture, the atomizer is used for court after the start moisture absorption increases intracavity and sprays the salt solution granule, control module still is used for starting the atomizer and opens the second air pump after predetermineeing the time quantum, the second gasThe pump is used for pumping air inside the moisture absorption lengthening cavity into the heat exchange tube after starting. The cultivation space adopts a semi-closed form, crops are cultivated in the cultivation space, when moisture on the surface of the crops (mainly leaves) is diffused into the air in a water vapor form, the real-time humidity in the air starts to increase, when the real-time humidity is larger than a first preset threshold value, the first air pump and the atomizer are controlled to be started, wherein the first preset threshold value is preset and is changed according to the growth information of the crops, the season of the cultivation space, the environment and the weather, and other factors, when the first air pump is started, the gas in the cultivation space reaches the moisture absorption growth cavity, the atomizer starts to perform spraying operation, preferably, the particle diameter of salt solution sprayed by the used atomizer is 20-300nm, the spraying flow rate is 3L/min, the spraying time is 5-10min, and the gas in the cavity is uniformly mixed by a fan arranged in the cavity during spraying, the quantity of the nano salt solution particles in the cavity after the spraying is finished is 10⁴-10⁵Per m³After the spraying is finished, the stability is started, further, the second air pump is started after the atomizer is started for a preset time period, wherein the preset time period is also preset and preferably 20min, and is also changed according to the change of the factors such as the crop growth information, the season of the cultivation space, the environment and the weather, and when the second air pump is started, gaseous water molecules which are gathered together with the salt solution particles in the moisture absorption increasing cavity enter the heat exchange tube and enter the water collecting section, the gaseous water molecules contact the bionic water collecting module to carry out rapid heat exchange, thereby gathering into a large number of water drops to form liquid water flowing into the liquid storage tank, gaseous water molecules which are not condensed enter the cultivation space again from the tail end of the heat exchange pipe, meanwhile, the water pumping operation module can put the liquid water collected in the liquid storage tank into the cultivation operation again, so that the circulating utilization of the evaporated water is formed.

Preferably, the bionic water collecting module comprises a plurality of bionic water collecting net arrays which are sequentially arranged along the water collecting section, the bionic coating is arranged on the surface of the bionic water collecting net array, and the periphery of the bionic water collecting net array is contacted with the inner wall of the water collecting section. A plurality of bionical catchment net battles array can carry out multistage catchment operation to form the concentration change field of gaseous state hydrone, under the prerequisite that improves space utilization, fully improve gaseous state water liquefaction efficiency.

Preferably, the bionic water collecting net array comprises a plurality of bionic metal wire meshes and iron wires fixed at the edges of the bionic metal wire meshes, the bionic metal wire meshes are uniformly distributed on the iron wires, and the bionic coating is arranged on the surfaces of the bionic metal wire meshes. The bionic metal wire mesh sheet is made of 304 stainless steel wires, the radius of the steel wires is 100 plus 500 mu m, the width of a formed gap grid is 2-5 times of the radius of the steel wires, then a bionic coating is formed on the surface of the bionic metal wire mesh sheet and is air-dried, then the bionic metal wire mesh sheet is processed into a circular sheet shape with the inner diameter slightly smaller than the inner diameter of a heat exchange pipe, then a plurality of bionic metal wire mesh sheets are welded on the iron wire strips at intervals of 0.5-3cm to form a bionic water collecting mesh array, and finally the iron wire strips are penetrated into the heat exchange pipe and fixed on the inner wall, so that the bionic water collecting module in the water collecting section is manufactured.

Preferably, both ends of the iron wire are provided with fixed ends, and the two fixed ends are respectively fixed inside the heat exchange tube through welding. Different bionic water collecting net arrays can be used for common use of the same iron wire strips, and two ends of the iron wire strips are fixed in the heat exchange tube by welding, so that the structural reliability is improved; when the whole heat exchange tube is installed, the inner wall of the heat exchange tube is directly coated with metal glue, the iron wire strip penetrates into the heat exchange tube, and then the fixed ends at the two ends of the iron wire strip are fixed with the heat exchange tube through welding, so that the installation efficiency is improved.

Preferably, the bionic metal wire mesh comprises a bionic coating arranged on the surface of the bionic metal wire mesh, the bionic coating is prepared by a preset treatment method through preset treatment raw materials, the preset treatment raw materials are 1H,1H,2H, 2H-heptadecafluorodecyl polysilsesquioxane and polyethyl methacrylate, and the preset treatment method comprises the following steps: mixing two raw materials in the preset treatment raw materials according to the mass ratio of 1: 1, and dissolving the mixture in a fluorine solution at the concentration of 10mg/ml to obtain the fluorine-containing composite material. And (3) preparing a bionic coating solution by using a fluorine solution which can be Asahiklin AK-225 solution, immersing the whole bionic metal wire mesh sheet into the bionic coating solution for 5-10min, and then air-drying to obtain the bionic metal wire mesh sheet with the bionic coating.

Preferably, the atomizer is connected with a saline solution preparation module, the saline solution preparation module is used for preparing the fresh water and the concentrated fertilizer in a preset proportion into a saline solution, and the atomizer is used for spraying saline solution particles in the saline solution preparation module towards the moisture absorption growth cavity.

Preferably, the concentrated fertilizer comprises any one or more of urea, nitrogen fertilizers in the ammonia state and nitrogen fertilizers in the nitrate state. The atomizer includes the nanometer atomizer, and salt solution preparation module includes liquid dilution fertilizer jar, and concentrated liquid fertilizer jar and clear water are connected to liquid dilution fertilizer jar, when needs spraying, pours into liquid dilution fertilizer jar with clear water and concentrated fertilizer into according to predetermined proportion to form inorganic salt solution.

Preferably, the control module group is still including setting up the level sensor on the preset height in the liquid storage tank, level sensor is used for gathering liquid level information after the contact liquid level, control module still is used for controlling the operation module that draws water and starts after receiving liquid level information. The liquid storage tank generally sets up and is less than soil surface height, consequently on the basis of saving the cost, its capacity should not be too big, liquid level sensor when on predetermineeing the height gathers liquid level information, that is to arrive when predetermineeing the height to liquid water liquid level, need control module control operation module of drawing water to take liquid water out, if uncomfortable irrigation this moment, the accessible draws water the operation module and stores the inside liquid water of liquid storage tank in addition, if can begin to irrigate immediately, can irrigate the operation through the operation module of drawing water.

Preferably, the environment monitoring module includes a humidity sensor disposed in the cultivation space, the humidity sensor being configured to collect real-time humidity of the cultivation space.

Preferably, the environment monitoring module still includes soil temperature sensor, soil temperature sensor is used for gathering the real-time temperature of soil in the cultivation space, control module is used for controlling when real-time humidity is greater than first preset threshold value and real-time temperature is less than the second and predetermines the threshold value first air pump with the atomizer starts. Humidity transducer gathers the real-time humidity of cultivation space, and when real-time humidity exceeded first predetermined threshold value, then represented the inside evapotranspired water concentration in cultivation space and reached the level of circulated collection, in order to guarantee the heat exchange efficiency of soil gas difference in temperature simultaneously, still need guarantee that soil temperature is less than the second and predetermine the threshold value, utilizes the soil gas difference in temperature this moment, can guarantee that efficiency is higher, the better gas-liquid conversion of effect.

The invention has the beneficial effects that:

in the whole recycling system, the moisture absorption growth cavity is filled with salt solution particles by spraying the salt solution particles in the moisture absorption growth cavity, and in the stabilizing process of the moisture absorption growth cavity, gaseous water molecules in gas in the cavity can be gathered on the salt solution particles, so that the particle size of the nano salt solution particles is continuously increased, water drops are easier to form by gathering on a subsequent bionic water collection module, and energy is saved by phase change; furthermore, the periphery of the bionic water collecting module is in contact with the inner wall of the water collecting section to form multidirectional heat conduction, on the premise that the diameter of gaseous water molecules is increased, efficient heat exchange is more easily carried out on the bionic water collecting module by utilizing the temperature difference of soil and gas, the water collecting efficiency is improved, and meanwhile, the hydrophilic and hydrophobic alternate surfaces of the bionic coating are utilized, so that the gaseous water molecules are changed from gaseous state to liquid state under the driving of the surface free energy gradient and the Laplace pressure difference, the efficiency of condensing into water drops and collecting a large number of water drops is improved to the maximum extent, and the energy is further saved; furthermore, the environment monitoring module in the control module is used for collecting the real-time humidity in the cultivation space and then the control module is used for monitoring, so that high-automation-level water circulation treatment is formed, and energy is further saved; furthermore, compared with the current water collecting equipment based on the soil-gas temperature difference principle, the invention has the advantages of lower cost and obviously improved integral water collecting efficiency, and compared with an air compressor and semiconductor refrigeration, the invention has lower operation cost because extra energy consumption is not needed for refrigeration, and is suitable for agricultural production.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic diagram of the connection between a circulating heat exchange module and a control module according to the present invention;

FIG. 2 is a schematic diagram of the bionic water-collecting module according to the present invention;

FIG. 3 is a perspective view of the bionic water collection module in the heat exchange tube;

FIG. 4 is a schematic perspective view of the present invention showing the accumulation of water evaporated from the biomimetic wire mesh;

FIG. 5 is a schematic perspective view of a biomimetic wire mesh sheet of the present invention;

FIG. 6 is a schematic diagram of the components of the bionic catchment network array of the present invention;

FIG. 7 is a schematic view of the components of the hygroscopic growth chamber of the present invention;

FIG. 8 is a schematic diagram of the control module of the present invention;

FIG. 9 is a schematic diagram of an environmental monitoring module according to the present invention.

Reference numerals:

1-cultivation space, 2-circulating heat exchange module, 21-first air pump, 22-second air pump, 23-heat exchange pipe, 231-water collection section, 232-bionic water collection module, 2321-bionic coating, 2322-bionic water collection net array, 2322 a-bionic metal wire net piece, 2322 b-iron wire rod, 233-liquid storage tank, 234-water pumping operation module, 24-moisture absorption and growth increasing cavity, 241-atomizer, 242-salt solution preparation module, 3-control module, 31-environment monitoring module, 311-humidity sensor, 312-soil temperature sensor, 32-control module and 33-liquid level sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, cannot be construed as limiting the present invention.

As shown in fig. 1 to 9, a low-energy-consumption crop evapotranspiration water recycling system comprises a cultivation space 1, crops are cultivated in the cultivation space 1, a circulating heat exchange module 2 and a control module 3 are arranged in the cultivation space 1, the circulating heat exchange module 2 comprises a first air pump 21, a second air pump 22 and a heat exchange pipe 23 buried underground, a moisture absorption lengthening cavity 24 is arranged at the head end of the heat exchange pipe 23, and the tail end of the heat exchange pipe 23 is communicated with the cultivation space 1; wherein, the moisture absorption lengthening cavity 24 is provided with an atomizer 241, the heat exchange tube 23 comprises a water collection section 231, the water collection section 231 is filled with a bionic water collection module 232 which is arranged in the water collection section 231 in a separated manner, the surface of the bionic water collection module 232 is provided with a bionic coating 2321 and contacts the inner wall of the water collection section 231, the water collection section 231 is connected with a liquid storage tank 233, the liquid storage tank 233 is used for collecting liquid water in the water collection section 231, a water pumping operation module 234 is arranged in the liquid storage tank 233, and the water pumping operation module 234 is used for putting the liquid water collected in the liquid storage tank 233 into cultivation operation; control module 3 includes environmental monitoring module 31 and control module 32, environmental monitoring module 31 is used for gathering the real-time humidity of cultivation space 1, control module 32 is used for controlling first air pump 21 and atomizer 241 to start when real-time humidity is greater than first preset threshold value, first air pump 21 is used for after the start-up with the inside air suction in cultivation space 1 moisture absorption increase chamber 24, atomizer 241 is used for after the start-up spraying salt solution granule in towards moisture absorption increase chamber 24, control module 32 still is used for starting second air pump 22 after the preset time quantum of atomizer 241 opens, second air pump 22 is used for after the start-up with moisture absorption increase chamber 24 inside air suction heat exchange tube 23.

In this embodiment, it should be noted that the cultivation space 1 is in a semi-closed form, crops are cultivated in the cultivation space 1, after moisture on the surface of the crops (mainly leaves) is emitted into the air in the form of water vapor, the real-time humidity in the air starts to increase, when the real-time humidity is greater than a first preset threshold, the first air pump 21 and the atomizer 241 are controlled to start, wherein the first preset threshold is preset and changes according to the growth information of the crops, the season of the cultivation space 1, the environment and the weather, and the like, when the first air pump 21 is started, the air in the cultivation space 1 reaches the moisture absorption and growth chamber 24, and the atomizer 241 starts to perform spraying operation, preferably, the used atomizer 241 sprays saline solution particles with a particle diameter of 20-300nm, a spraying flow rate of 3L/min, and a spraying time of 5-10min, uniformly mixing the air in the cavity by adopting a fan arranged in the cavity while spraying, wherein the quantity of nano salt solution particles in the cavity is 104- & lt 105- & gt/m & lt 3 & gt after spraying is finished, stabilizing is carried out after spraying is finished, further, the second air pump 22 is started after the atomizer 241 is started for a preset time period, wherein the preset time period is also preset and preferably 20min, and is changed according to the growth information of crops, the season of the cultivation space 1, the environment and the weather, and other factors, when the second air pump 22 is started, gaseous water molecules which are gathered with the salt solution particles in the moisture absorption lengthening cavity 24 enter the heat exchange tube 23 and enter the water gathering section 231, the gaseous water molecules contact the bionic water gathering module 232 to carry out rapid heat exchange, so that a large number of water drops are gathered to form liquid water molecules flowing into the liquid storage tank 233, and the uncondensed gaseous water can reenter the cultivation space 1 from the tail end of the heat exchange tube 23, meanwhile, the water pumping module 234 can put the liquid water collected in the liquid storage tank 233 into the cultivation again, so as to form the recycling of the evaporated water. In conclusion, in the whole recycling system, the salt solution particles are filled in the moisture absorption lengthening cavity 24 by spraying the salt solution particles in the moisture absorption lengthening cavity 24, and in the stabilizing process of the moisture absorption lengthening cavity 24, gaseous water molecules in the gas in the cavity are gathered on the salt solution particles, so that the particle size of the nano salt solution particles is continuously increased, and therefore, the nano salt solution particles are easier to gather on the subsequent bionic water collection module 232 to form water drops, phase change is carried out, and energy is saved; furthermore, the periphery of the bionic water collecting module 232 is in contact with the inner wall of the water collecting section 231 to form multidirectional heat conduction, on the premise that the diameter of gaseous water molecules is increased, efficient heat exchange is more easily carried out on the bionic water collecting module 232 by utilizing the temperature difference of soil and gas, the water collecting efficiency is improved, meanwhile, the hydrophilic and hydrophobic alternate surface of the bionic coating 2321 is utilized, so that the gaseous water molecules are changed into liquid from gaseous under the driving of the surface free energy gradient and the Laplace pressure difference, the efficiency of condensing into water drops and collecting a large number of water drops is improved to the maximum extent, and the energy is further saved; furthermore, the real-time humidity in the cultivation space 1 is collected by the environment monitoring module 31 in the control module 3, and then is monitored by the control module 32, so that high-automation-level water circulation treatment is formed, and energy is further saved; furthermore, compared with the current water collecting equipment based on the soil-gas temperature difference principle, the invention has the advantages of lower cost and obviously improved integral water collecting efficiency, and compared with an air compressor and semiconductor refrigeration, the invention has lower operation cost because extra energy consumption is not needed for refrigeration, and is suitable for agricultural production.

Specifically, the bionic water collection module 232 includes a plurality of bionic water collection net arrays 2322 sequentially arranged along the water collection section 231, the bionic coating 2321 is arranged on the surface of the bionic water collection net array 2322, and the periphery of the bionic water collection net array 2322 contacts the inner wall of the water collection section 231.

In this embodiment, it should be noted that the plurality of bionic water collecting net arrays 2322 can perform multi-stage water collecting operation, and form a concentration change field of gaseous water molecules, so as to fully improve the liquefaction efficiency of gaseous water on the premise of improving the space utilization rate.

Specifically, the bionic water collecting grid array 2322 comprises a plurality of bionic metal wire meshes and iron wires fixed at the edges of the bionic metal wire meshes, the bionic metal wire meshes are uniformly distributed on the iron wires, and the bionic coating 2321 is arranged on the surface of the bionic metal wire meshes.

In this embodiment, it should be noted that the bionic metal wire mesh sheet is made of 304 stainless steel wires, the radius of the steel wires is 100-.

Specifically, fixed ends are arranged at two ends of the iron wire, and the two fixed ends are respectively fixed inside the heat exchange tube 23 through welding.

In this embodiment, it should be noted that different bionic water collection net arrays 2322 can use the same iron wire, and two ends of the iron wire are fixed inside the heat exchange tube 23 by welding, so as to improve the structural reliability; when installing whole hot exchange pipe 23, directly paint hot exchange pipe 23 inner wall with the metal glue, wear to lead to hot exchange pipe 23 inside with the iron wire strip simultaneously, fix the fixed end at iron wire strip both ends through welding and hot exchange pipe 23 to improve the installation effectiveness.

Specifically, the bionic metal wire mesh comprises a bionic coating 2321 arranged on the surface of the bionic metal wire mesh, the bionic coating 2321 is prepared by a preset treatment method through preset treatment raw materials, the preset treatment raw materials are 1H,1H,2H, 2H-heptadecafluorodecyl polysilsesquioxane and polyethyl methacrylate, and the preset treatment method comprises the following steps: mixing two raw materials in the preset treatment raw materials according to the mass ratio of 1: 1, and dissolving the two raw materials in a fluorine solution at the concentration of 10mg/ml to obtain the fluorine-containing composite material.

In this embodiment, it should be noted that the fluorine solution may be Asahiklin AK-225 solution, and after the solution of the bionic coating 2321 is prepared, the whole bionic wire mesh is immersed in the solution of the bionic coating 2321 for 5-10min, and then air-dried, so as to obtain the bionic wire mesh with the bionic coating 2321.

Specifically, the atomizer 241 is connected with a salt solution preparation module 242, the salt solution preparation module 242 is used for preparing the fresh water and the concentrated fertilizer into a salt solution according to a preset proportion, and the atomizer 241 is used for spraying the salt solution particles in the salt solution preparation module 242 into the moisture absorption increasing cavity 24.

Specifically, the concentrated fertilizer comprises any one or more of urea, an ammonia nitrogen fertilizer and a nitrate nitrogen fertilizer.

In this embodiment, it should be noted that the atomizer 241 includes a nano-atomizer, and the salt solution preparation module 242 includes a liquid diluted fertilizer tank, the liquid diluted fertilizer tank is connected to the concentrated liquid fertilizer tank and the clean water, and when spraying is needed, the clean water and the concentrated fertilizer are injected into the liquid diluted fertilizer tank according to a predetermined ratio, so as to form an inorganic salt solution.

Specifically, the control module 3 further includes a liquid level sensor 33 disposed at a preset height in the liquid storage tank 233, the liquid level sensor 33 is configured to collect liquid level information after contacting a liquid level, and the control module 32 is further configured to control the pumping operation module 234 to start after receiving the liquid level information.

In this embodiment, it should be noted that the liquid storage tank 233 is generally set to be lower than the soil surface height, so that the capacity of the liquid storage tank 233 should not be too large on the basis of cost saving, when the liquid level sensor 33 at the preset height collects the liquid level information, that is, when the liquid level of the liquid water reaches the preset height, the control module 32 is required to control the water pumping operation module 234 to pump out the liquid water, at this time, if irrigation is not suitable, the liquid water in the liquid storage tank 233 can be additionally stored through the water pumping operation module 234, and if irrigation can be immediately started, irrigation operation can be performed through the water pumping operation module 234.

Specifically, the environment monitoring module 31 includes a humidity sensor 311 disposed in the cultivation space 1, and the humidity sensor 311 is used for acquiring the real-time humidity of the cultivation space 1.

Specifically, the environment monitoring module 31 further includes a soil temperature sensor 312, the soil temperature sensor 312 is used for collecting the real-time temperature of the soil in the cultivation space 1, and the control module 32 is used for controlling the first air pump 21 and the atomizer 241 to start when the real-time humidity is greater than a first preset threshold and the real-time temperature is less than a second preset threshold.

In this embodiment, it should be noted that humidity sensor 311 collects the real-time humidity of cultivation space 1, and when the real-time humidity exceeded first predetermined threshold value, then represented the level that cultivation space 1 inside evapotranspired water concentration has reached circulated collection, in order to guarantee the heat exchange efficiency of soil-gas temperature difference, still need guarantee that soil temperature is less than the second and predetermines the threshold value simultaneously, utilizes the soil-gas temperature difference this moment, can guarantee that efficiency is higher, the better gas-liquid conversion of effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.