Greenhouse self-driven atmospheric water harvesting supplemental irrigation system

Abstract

This application discloses a self-driven atmospheric water collection and supplementary irrigation system for greenhouses, relating to the field of agricultural greenhouse water resource collection and energy utilization regulation technology. It includes: an atmospheric water collection module, a thermoelectric power generation module, an execution module, a water and electricity storage module, a greenhouse data acquisition module, a control module, and an irrigation module. The thermoelectric power generation module is located on top of the atmospheric water collection module. The atmospheric water collection module is tilted and positioned on the top of the greenhouse. The execution module is located on the atmospheric water collection module. The water and electricity storage module is located on the greenhouse floor and is correspondingly positioned to the atmospheric water collection module. The water and electricity storage module is connected to the thermoelectric power generation module, the execution module, the greenhouse data acquisition module, and the irrigation module, respectively. The control module is connected to the water and electricity storage module, the greenhouse data acquisition module, the irrigation module, and the execution module, respectively. This application enables the self-sustaining cycle and efficient utilization of energy and water resources within the greenhouse.

Description

Technical Field

[0001] This application relates to the field of agricultural greenhouse water resource collection and energy utilization regulation technology, and in particular to a greenhouse self-driven atmospheric water collection and supplementary irrigation system. Background Technology

[0002] Currently, agricultural water consumption accounts for a large portion of total human water consumption. However, in greenhouse production, on the one hand, most irrigation water is lost through soil evaporation and plant transpiration, with only a small portion used for plant growth. On the other hand, this lost moisture directly increases greenhouse humidity. This high-humidity environment easily induces crop diseases, hinders pollination, and inhibits normal transpiration and nutrient absorption, directly threatening crop health and yield. Due to the inherent high humidity and dehumidification requirements of greenhouses, adsorption-based air-source water harvesting technology has great potential for application in greenhouses. However, atmospheric water harvesting technology usually relies on external energy sources, limiting its application in areas without grid coverage. Thermoelectric power generation technology utilizes the temperature gradient in the environment to generate electricity, offering advantages such as no moving parts, high reliability, and suitability for distributed energy systems. However, its output power is usually low, making it difficult to drive high-energy-consuming equipment independently. Therefore, under the current technological framework, water-saving irrigation technology fails to recover and utilize evaporative moisture in greenhouses, atmospheric water harvesting technology is constrained by external energy supply, and local thermoelectric energy cannot be effectively utilized due to insufficient power. The lack of synergy among these three technologies creates a break in the technological closed loop.

[0003] To address the aforementioned issues, there is an urgent need for a self-driven atmospheric water collection and supplementary irrigation system that can achieve self-sustaining circulation and efficient utilization of energy and water resources within the greenhouse system. Summary of the Invention

[0004] The purpose of this application is to provide a greenhouse self-driven atmospheric water collection and supplementary irrigation system that can achieve self-sustaining circulation and efficient utilization of energy and water resources inside the greenhouse.

[0005] To achieve the above objectives, this application provides the following solution: This application provides a greenhouse self-driven atmospheric water collection and supplementary irrigation system, including: an atmospheric water collection module, a thermoelectric power generation module, an execution module, a water and electricity storage module, a greenhouse data acquisition module, a control module, and an irrigation module; The thermoelectric power generation module is mounted on top of the atmospheric water collection module; the atmospheric water collection module is inclinedly mounted on the top of the greenhouse; the execution module is mounted on the atmospheric water collection module; the water and electricity storage module is mounted on the greenhouse floor and is correspondingly mounted to the atmospheric water collection module; the water and electricity storage module is connected to the thermoelectric power generation module, the execution module, the greenhouse data acquisition module, and the irrigation module respectively; the control module is connected to the water and electricity storage module, the greenhouse data acquisition module, the irrigation module, and the execution module respectively. The atmospheric water collection module is used to collect moisture from the air inside the greenhouse and form condensate; the thermoelectric power generation module is used to convert the heat changes generated by the atmospheric water collection module in the process of collecting water vapor and the formation of condensate into electrical energy; the greenhouse data acquisition module is used to collect environmental data of the greenhouse; the control module is used to generate control commands based on the greenhouse environmental data; the execution module controls the opening or closing of the atmospheric water collection module based on the control commands; the water and electricity storage module is used to store the condensate and the electrical energy; the water and electricity storage module is also used to provide electrical energy to the execution module, the greenhouse data acquisition module, the control module, and the irrigation module; The control module is also used to generate a supplementary irrigation command based on the environmental data of the greenhouse; the irrigation module is used to supplement the irrigation of crops in the greenhouse using the condensate stored in the water and electricity storage module based on the supplementary irrigation command.

[0006] According to the specific embodiments provided in this application, this application has the following technical effects: This application provides a self-driven atmospheric water collection and supplemental irrigation system for greenhouses. An atmospheric water collection module collects moisture from the air inside the greenhouse, forming condensate, which is then stored in a water and electricity storage module, achieving on-site water vapor recovery within the greenhouse. A thermoelectric generator module converts the heat changes generated during the water vapor collection process and the condensation process into electrical energy, which is also stored in the water and electricity storage module. This reduces or eliminates the need for external power supply, improving the system's availability and reliability in remote areas or areas with limited power resources. A greenhouse data acquisition module collects environmental data from the greenhouse. A control module generates control and supplemental irrigation commands based on this data, controlling the execution and irrigation modules respectively. The execution module further controls the opening and closing of the atmospheric water collection module. The irrigation module uses the condensate stored in the water and electricity storage module to supplement irrigation for crops inside the greenhouse. This intelligent control system maintains high energy acquisition efficiency and operational stability in different environments and regions, reducing manual intervention and operational energy consumption, improving system adaptability, and achieving self-sustaining circulation and efficient utilization of energy and water resources within the greenhouse. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1This is a schematic diagram of the structure of a greenhouse self-driven atmospheric water collection and supplemental irrigation system according to an embodiment of this application; Figure 2 A schematic diagram showing the location of a greenhouse self-driven atmospheric water collection and supplementary irrigation system provided in an embodiment of this application within a greenhouse; Figure 3 This is a schematic diagram of the structure of an atmospheric water collection module, a thermoelectric power generation module, and an execution module provided in an embodiment of this application.

[0009] Reference numerals: 1-Moisture-absorbing material, 2-Cavity, 3-Heat sink, 4-Condensation panel, 5-Rubber sealing ring, 6-Aluminum plate, 7-Thermoelectric generator, 8-Spectrum adaptive coating, 9-Battery, 10-Charge and discharge controller, 11-Inverter, 12-Water collection tank, 13-Geared motor, 14-Opening and closing telescopic controller. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0011] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0012] The purpose of this application is to provide a greenhouse self-driven atmospheric water harvesting and supplemental irrigation system. This system is a highly integrated, energy-self-sufficient water-energy synergistic management device for facility agriculture. It can actively capture and convert high-humidity water vapor inside the greenhouse without relying on external energy input, recovering it as usable irrigation water to supplement the irrigation of crops within the greenhouse, thereby significantly improving water resource recycling efficiency. Simultaneously, the system achieves energy self-sufficiency by coupling solar thermal conversion with diurnal temperature difference power generation, effectively reducing the traditional energy consumption of greenhouses and enhancing the comprehensive utilization level of renewable energy in facility agriculture. The greenhouse self-driven atmospheric water harvesting and supplemental irrigation system is particularly suitable for various types of solar greenhouses, single or multi-span greenhouses, aiming to recover and utilize water generated by plant transpiration and soil evaporation in situ, and using the inherent diurnal temperature difference of the greenhouse and solar energy to drive this process, achieving internal circulation of water resources and energy.

[0013] In one exemplary embodiment, such as Figures 1-3As shown, a self-driven atmospheric water collection and supplemental irrigation system for greenhouses is provided, comprising: an atmospheric water collection module, a thermoelectric power generation module, an execution module, a water and electricity storage module, a greenhouse data acquisition module, a control module, and an irrigation module. These modules are arranged spatially around the greenhouse enclosure structure, forming a collaborative whole.

[0014] The thermoelectric power generation module is mounted on top of the atmospheric water collection module. The atmospheric water collection module is tilted and mounted on the top of the greenhouse. The execution module is mounted on the atmospheric water collection module. The water and electricity storage module is mounted on the greenhouse floor, corresponding to the atmospheric water collection module. The water and electricity storage module is connected to the thermoelectric power generation module, the execution module, the greenhouse data acquisition module, and the irrigation module, respectively. The control module is connected to the water and electricity storage module, the greenhouse data acquisition module, the irrigation module, and the execution module, respectively.

[0015] The atmospheric water collection module collects moisture from the air inside the greenhouse, forming condensate. The thermoelectric generator module converts the heat generated during the water vapor collection process and the condensation process into electrical energy. The greenhouse data acquisition module collects environmental data. The control module generates control commands based on the greenhouse environmental data. The execution module controls the opening and closing of the atmospheric water collection module based on the control commands. The water and energy storage module stores condensate and electrical energy. This module also provides power to the execution module, greenhouse data acquisition module, control module, and irrigation module.

[0016] The control module is also used to generate supplementary irrigation commands based on the greenhouse's environmental data. The irrigation module is used to supplement the irrigation of crops in the greenhouse using condensate stored in the water and electricity storage modules, based on the supplementary irrigation commands.

[0017] In one embodiment, the atmospheric water collection module is the core of the greenhouse self-driven atmospheric water collection and irrigation system, enabling water replenishment, storage, and release. The atmospheric water collection module includes: a moisture-absorbing material 1, a cavity 2, heat sinks 3, and a condenser panel 4. A thermoelectric power generation module is located on the outer side of the top panel of the cavity 2. The moisture-absorbing material 1 is located on the inner side of the top panel of the cavity 2. The condenser panel 4 is located below the cavity 2. The heat sinks 3 are located below the condenser panel 4. The condenser panel 4, the cavity 2, and the moisture-absorbing material 1 form a sealed cavity.

[0018] Specifically, cavity 2 is a sealable acrylic cavity with an openable and closable structure, installed in the upper-middle part of the inner side of the greenhouse. Cavity 2 is closed at the top and open at the bottom. Moisture-absorbing material 1 is bonded to the inner side of the top panel of cavity 2 using thermally conductive silicone. The condenser panel 4 is fixed to the bottom of cavity 2 via hinges, allowing it to open and close at angles from 0° to 45°. In this embodiment, the heat sink 3 is a finned heat sink, bonded to the bottom of the condenser panel 4 (i.e., the side facing the external environment), increasing the contact area with air and thus enhancing heat dissipation and reducing the temperature of the condenser panel 4. Rubber sealing rings 5 ​​are provided around the condenser panel 4, ensuring airtightness when closed, as it forms a sealed cavity with cavity 2 (i.e., the interior of cavity 2 is a sealed space). Cavity 2 is installed at an angle along the top surface of the greenhouse (when the greenhouse is a solar greenhouse, it is installed along the natural curvature of the greenhouse top; when the greenhouse is a glass greenhouse, the angle can be 30°), utilizing gravity to promote the collection of condensate.

[0019] The moisture-absorbing material 1 is preferably a high-performance composite adsorbent material, specifically made by loading anhydrous lithium chloride (LiCl) onto a porous matrix adsorbent material (e.g., copper foam). In this embodiment, the lithium chloride loading rate can be 30%~45% by mass. This moisture-absorbing material 1 exhibits high adsorption capacity (saturated moisture absorption rate can reach more than 80% of the material's dry weight) and fast adsorption kinetics in a greenhouse nighttime environment with a relative humidity (RH) higher than 60%; when the temperature inside the greenhouse is heated to 35-50℃, it can achieve rapid and complete desorption of moisture.

[0020] The preparation process of moisture-absorbing material 1 is as follows: Copper foam is soaked sequentially in purified water and anhydrous ethanol for 30 minutes each, then removed and dried at 90°C for 12 hours. Separately, a 35% lithium chloride solution is prepared and magnetically stirred for 12 hours. The supernatant of the solution is collected, and the dried copper foam is immersed in it and stirred for four hours. The copper foam is then removed and placed in a petri dish, where it is dried at 105°C for 24 hours. The final structure of moisture-absorbing material 1 is a composite water-collecting block with porous copper foam as the framework, and lithium chloride uniformly loaded on its surface and in its internal pores.

[0021] Preferably, to prevent salt leakage, the composite water collection block can be stabilized by microencapsulation technology or by cross-linking with a polymer (polyvinyl alcohol).

[0022] Regarding the condenser panel 4 and the finned heat sink: When the condenser panel 4 is turned on at night, the temperature inside the greenhouse is lower, which is conducive to the adsorption process and promotes the condensation of atmospheric moisture on the condenser panel 4; when the condenser panel 4 is turned off during the day, the finned heat sink located on the outside of the condenser panel 4 can effectively dissipate the heat on the side of the condenser panel 4 and the latent heat released by the condensation of moisture, maintain the condenser panel 4 at a relatively low temperature, and promote the condensation of water vapor.

[0023] Preferably, the inner surface of the condenser panel 4 can be hydrophilic treated (sprayed with a titanium dioxide nano-coating) to reduce the water droplet adhesion angle and allow condensate to slide off quickly. The finned heat sink is made of aluminum fins, whose high thermal conductivity reduces the temperature at the condenser panel 4. The number of heat-conducting fins at the bottom of the aluminum fins is no less than seven.

[0024] In one embodiment, the thermoelectric power generation module is key to achieving self-sufficiency in energy (i.e., electricity) for the greenhouse's self-driven atmospheric water collection and irrigation system. The thermoelectric power generation module includes an aluminum plate 6, a thermoelectric generator 7, and a spectrally adaptive coating 8. The aluminum plate 6 is disposed on the outer side of the top panel of the cavity 2. The thermoelectric generator 7 is disposed on the aluminum plate 6. The spectrally adaptive coating 8 is adhered to the thermoelectric generator 7. The thermoelectric generator 7 is connected to a water and electricity storage module.

[0025] Specifically, aluminum plate 6 is attached to the outer side of the top panel of cavity 2, one side of thermoelectric generator 7 is attached to aluminum plate 6, and the other side of thermoelectric generator 7 is attached with a spectral adaptive coating 8. The spectral adaptive coating 8 enables heat collection during the day and cooling at night. Based on this, the thermoelectric generator module is set on the outside of the greenhouse, and the atmospheric water collection module is set on the top of the inside of the greenhouse. The two are arranged opposite each other and sandwiched between the two sides of the greenhouse wall, and fixed with thermally conductive silicone.

[0026] Preferably, the spectral adaptive coating 8 uses a commercially available black fluoropolymer film, which efficiently absorbs solar radiation (especially visible and near-infrared light) during the day, converting it into heat energy and significantly increasing the coating temperature. At night, it efficiently emits infrared radiation into the cold external environment through an atmospheric window (8μm~13μm band), thereby achieving radiative cooling and reducing the temperature of the spectral adaptive coating 8 below the ambient temperature. Thermoelectric generator 7 can be made of bismuth telluride (Bi2Te3) semiconductor material. To improve output voltage and power, multiple thermoelectric generators 7 can be connected in series to form a thermoelectric generator unit and attached to the aluminum plate 6. Depending on the actual installation area and power requirements, multiple thermoelectric generator units can be connected in parallel. The aluminum plate 6 acts as a heat spreader, ensuring uniform and efficient heat transfer between the thermoelectric generator 7 and the atmospheric water collection module.

[0027] In one embodiment, the water and electricity storage module is responsible for collecting, storing, and distributing the electrical energy generated by the greenhouse's self-driven atmospheric water collection and irrigation system, as well as collecting condensate. The water and electricity storage module includes a battery 9, a charge / discharge controller 10, an inverter 11, and a water collection tank 12. The water collection tank 12 is correspondingly positioned to correspond with the atmospheric water collection module. The battery 9 is connected to both the charge / discharge controller 10 and the inverter 11. The charge / discharge controller 10 is connected to the thermoelectric power generation module. The inverter 11 is connected to the control module, the execution module, the greenhouse data acquisition module, and the irrigation module.

[0028] Specifically, the output circuit of the thermoelectric generator 7 in the thermoelectric power generation module is connected to the charge / discharge controller 10. The charge / discharge controller 10 is connected to the battery 9 to ensure that the battery 9 can be charged and discharged quickly and effectively, and to protect the battery 9 from overcharging and over-discharging. The DC power generated by the thermoelectric generator 7 is output to the charge / discharge controller 10. After the charge / discharge controller 10 optimizes the power output by performing maximum power point tracking, it charges the battery 9 and provides overcharge, over-discharge, and short-circuit protection. The battery 9 is used to store the electrical energy generated by the thermoelectric generator 7. The battery 9 stores DC power internally, and the battery 9 is connected to the inverter 11 to convert the DC power into AC power (specifically 220V / 50Hz) to power other modules in the greenhouse. In this embodiment, the battery 9 is a lithium iron phosphate battery. A water collection tank 12 is arranged at the bottom of the greenhouse to collect the accumulated condensate.

[0029] In one embodiment, the execution module includes a geared motor 13 and an opening / closing telescopic controller 14. The geared motor 13 is mounted on the cavity 2. One end of the opening / closing telescopic controller 14 is fixed to the condenser panel 4, and the other end is connected to the geared motor 13. The geared motor 13 is connected to both the water and electricity storage module and the control module. The geared motor 13 controls the opening and closing of the opening / closing telescopic controller 14 based on control commands, thereby controlling the opening or closing of the condenser panel 4.

[0030] Specifically, the power input terminal of the geared motor 13 is connected to the water and electricity storage module. The control signal terminal of the geared motor 13 is connected to the control module. The output terminal of the geared motor 13 is connected to the opening and closing telescopic controller 14. The output shaft of the geared motor 13 is connected to the input shaft of the opening and closing telescopic controller 14 through a coupling or gear set. The geared motor 13 drives the opening and closing telescopic controller 14 according to the control command, thereby driving the condenser panel 4 to open or close (i.e., open or close from 0° to 45°).

[0031] In one embodiment, the greenhouse environmental data includes condenser panel location data, light intensity data, air temperature data, air humidity data, and soil moisture data. The greenhouse data acquisition module includes a location feedback sensor, a light intensity sensor, a temperature and humidity sensor, and a soil moisture sensor.

[0032] A position feedback sensor is installed on the condenser panel 4. A light sensor is installed in the greenhouse. A temperature and humidity sensor is installed in the greenhouse. A soil moisture sensor is installed in the crop soil inside the greenhouse. The position feedback sensor is used to collect position data of the condenser panel. The light sensor is used to collect light data. The temperature and humidity sensor is used to collect air temperature and air humidity data. The soil moisture sensor is used to collect soil moisture data.

[0033] Specifically, the position feedback sensor collects the position data of the condenser panel 4 to determine whether the condenser panel 4 is fully open or closed. The light sensor collects the light data to determine the control mode of the control module. The position feedback sensor is installed on the side of the connection between the condenser panel 4 and the opening / closing telescopic controller 14. The light sensor is installed in the unobstructed area in the middle of the greenhouse, at the same height as the crop canopy. Temperature and humidity sensors are installed every 200m² in the greenhouse. 2 ~300m 2 Set one, and avoid special locations such as ventilation openings and equipment air outlets.

[0034] Soil moisture sensor every 500m 2 One or two sensors are installed near the roots of the crop, approximately 5-10 cm away from the main stem, avoiding direct contact with fertilizer inlets or waterlogged areas. The burial depth of the sensors is determined based on the depth of the crop root zone. The measured values ​​(i.e., soil moisture data) are arithmetically averaged to obtain the real-time soil volumetric water content for that zone.

[0035] The signal lines from the position feedback sensor, light sensor, temperature and humidity sensor, and soil moisture sensor all converge to the corresponding interface of the control module, thereby enabling the control module to acquire environmental data of the greenhouse. Based on the acquired environmental data, the control module generates control commands to drive the geared motor 13 to rotate. Simultaneously, it uses the position feedback sensor to monitor the position data of the condenser panel in real time, thereby monitoring the final execution effect of the geared motor 13 and continuously adjusting the issued control commands accordingly, forming a closed-loop control system that automatically corrects deviations.

[0036] In one embodiment, the control module serves as the command center for the greenhouse's self-driven atmospheric water collection and supplementary irrigation system, enabling fully automatic operation control of the system. The control module can utilize a microcontroller (ARM Cortex-M series chip) as its control core, receiving environmental data from the greenhouse and generating and issuing control commands and supplementary irrigation commands using a preset control algorithm.

[0037] The control commands include on / off commands and off commands. The control module determines the control mode based on illumination data. The control modes include night mode and day mode. In night mode, the control module generates an on / off command based on the condenser panel position data. The execution module controls the condenser panel 4 to open based on the on / off command. In day mode, the control module generates an off / off command based on the condenser panel position data. The execution module controls the condenser panel 4 to close based on the off / off command.

[0038] The control commands primarily control the geared motor 13, which in turn controls the extension and retraction of the telescopic controller 14. In night mode, the geared motor 13 rotates forward, extending the telescopic controller 14 and opening the condenser panel 4. In day mode, the geared motor 13 rotates in reverse, shortening the telescopic controller 14 and closing the condenser panel 4. The telescopic controller 14 may contain limit switches (working in conjunction with a position feedback sensor). The telescopic controller 14 itself does not independently acquire signals; its extension and retraction are driven by the microcontroller via the geared motor 13.

[0039] The microcontroller acquires the following signals in real time every minute at a fixed sampling period: the ambient illuminance value L (i.e., illumination data) output by the light sensor; the temperature T (i.e., air temperature data) and relative humidity RH (i.e., air humidity data) output by the temperature and humidity sensor; the actual opening and closing angle θ of the condenser panel 4 (i.e., condenser panel position data) output by the position feedback sensor; and the current time t provided by the internal real-time clock (RTC). To prevent misjudgments caused by momentary cloud cover, electromagnetic interference, etc., the microcontroller performs sliding window averaging filtering on the illumination signal L, with the window length preferably being 5 sampling periods, to obtain a stable illumination intensity value L1.

[0040] The judgment logic for the control mode in the microcontroller is as follows: the microcontroller is preset with a daytime period (08:00~20:00), a nighttime period (20:00~08:00 of the next day), and an illuminance switching threshold Lth. Lth is preferably 3000Lux. The microcontroller determines the operation mode according to L1 and the current time t. 1) Night mode (i.e., adsorption mode): when L1<Lth and the current time t is in the nighttime period, it is determined as night mode. At this time, the control target is set that the condensation panel 4 is fully opened, that is, the target angle θ1=45°, so as to perform adsorption water collection by using the low-temperature and high-humidity environment at night. 2) Daytime mode (i.e., desorption-condensation): when L1>Lth and the current time is in the daytime period, it is determined as daytime mode. At this time, the control target is set that the condensation panel 4 is fully closed, that is, the target angle θ1=45°, so as to heat for desorption by using daytime solar radiation, and realize condensation collection through temperature reduction by the condensation panel 4 and the heat sink 3. 3) In order to avoid frequent mode switching caused by illuminance fluctuation in the morning or evening, a transition hysteresis band of about 1 hour (07:00~08:00 and 19:00~20:00) is set between daytime and nighttime. In this transition zone, the microcontroller maintains the target angle of the previous non-transition state and does not perform main mode switching until both illuminance and time meet the switching conditions for daytime mode or night mode. 4) When the microcontroller is in daytime mode, if it monitors that the relative humidity RH>80%, it indicates that the humidity in the greenhouse is too high. At this time, the microcontroller will temporarily override the main mode, issue an instruction to open the condensation panel 4 to 45°, keep this state for 2h, and then automatically resume the operation of daytime mode. 5) If the signal collected by the light sensor is out of range or constantly zero for 30 consecutive minutes, the microcontroller determines that the sensor is faulty and automatically switches to pure timing control: it only drives the condensation panel 4 to fully open or fully close according to the daytime and nighttime periods defined by the internal RTC.

[0041] After the microcontroller determines the target angle according to the above judgment logic, it combines the actual opening and closing angle θ of the condensation panel 4 measured by the position feedback sensor to drive the reduction motor 13 through the following process: calculate the angle deviation , . If , it is considered that the condensation panel 4 has reached the target position, the microcontroller outputs a stop signal, and the reduction motor 13 is powered off; if , the microcontroller controls the reduction motor 13 to rotate forward; if , the microcontroller controls the reduction motor 13 to rotate backward. If the reduction motor 13 runs continuously for more than 5 seconds and changes by less than 0.5°, it is determined that there is mechanical sticking or sensor failure, and the microcontroller controls the reduction motor 13 to stop running and records the fault.

[0042] All parameters involved in the above judgment logic and processing (such as Lth, start and end times of daytime and nighttime periods, high humidity intervention temperature and humidity values ​​(i.e., 80%), and jamming judgment time (e.g., exceeding the range for 30 consecutive minutes)) are stored in the microcontroller's non-volatile memory and can be modified on-site through external communication interfaces (such as RS-485, Bluetooth, or button panel) to adapt to different geographical climates and greenhouse crop needs.

[0043] In one embodiment, the working principle of the self-driven atmospheric water collection system for greenhouse self-driven atmospheric water collection supplementary irrigation is explained based on the structure of the greenhouse self-driven atmospheric water collection supplementary irrigation system in the above embodiments.

[0044] 1. In night mode, the atmospheric water collection module adsorbs water.

[0045] The control module determines whether to enter night mode based on the signal from the light sensor and the nighttime period. The control module issues an activation command to drive the geared motor 13, causing the extension controller 14 to smoothly open the condenser panel 4 of the atmospheric water collection module to 45°. The position feedback sensor confirms in real time that the panel is fully open and sends a signal back to the control module to ensure that the condenser panel 4 opens and closes normally.

[0046] After the condensation panel 4 is turned on, the condensate collected during the day falls into the water collection tank 12 at the bottom of the greenhouse for storage due to gravity.

[0047] At night, due to the drop in temperature, the saturated water vapor pressure of the air decreases, and the relative humidity inside the greenhouse often rises to over 80%, even reaching saturation. With the condenser panel 4 opened, some of the high-humidity air inside the greenhouse comes into direct contact with the composite adsorbent material copper foam loaded with lithium chloride (i.e., moisture-absorbing material 1). Driven by the concentration difference, water vapor molecules first diffuse to the surface of moisture-absorbing material 1 via convection. Subsequently, they undergo capillary condensation and surface diffusion through the micropores and mesopores within the moisture-absorbing material 1. Lithium chloride, as a strongly hygroscopic salt, has an extremely low water vapor partial pressure at its solution surface, enabling it to form a strong adsorption potential in this high-humidity environment, chemically adsorbing water vapor molecules around its ions to form hydrated ions. Another portion of the high-humidity air, due to the cooling effect of the finned heat sink on the condenser panel 4, causes atmospheric moisture to condense on the condenser panel 4, and due to gravity, flows along the condenser panel 4 into the bottom water collection tank 12.

[0048] 2. In night mode, the thermoelectric power generation module generates electricity in conjunction with the night mode.

[0049] Outside the greenhouse, at night the ambient temperature is low, and the spectral adaptive coating 8 is in a high infrared emission state, acting as an infrared radiator to reduce its own temperature and the temperature of the outer side of the thermoelectric generator 7 through radiative cooling. At this time, the outer side of the thermoelectric generator 7 is at a lower temperature due to radiative cooling (forming a cold end).

[0050] Inside the greenhouse, at night, the moisture-absorbing material 1 rapidly absorbs water vapor. This process is exothermic, and the released heat is transferred to the aluminum plate 6, and then to the inside of the thermoelectric generator 7. At this time, the inside of the thermoelectric generator 7 has a higher temperature due to the conduction of the absorbed heat (forming a hot end).

[0051] The temperature difference between the hot and cold ends generates DC power output, which is stored in the battery 9 via the charge / discharge controller 10. The heat released during the adsorption of water vapor by the moisture-absorbing material 1 increases the temperature of the hot end, which helps to increase the temperature difference between the two ends and improve the output power. At the same time, this heat is conducted to the outdoor cold end via the thermoelectric generator 7 and partially converted into electrical energy, suppressing the temperature rise of the moisture-absorbing material 1 and thus maintaining its continuous moisture absorption capacity.

[0052] The power generation process consumes heat at the hot end (Peltier effect), resulting in a cooling effect. This cooling effect (transferred to the hygroscopic material 1 through heat conduction) helps suppress the temperature rise caused by adsorption heat release, thereby maintaining its high adsorption driving force and further improving adsorption efficiency. At the same time, the continuous adsorption heat release provides a stable heat source for power generation.

[0053] 3. Desorption-condensation of atmospheric water collection module in daytime mode.

[0054] The control module determines whether to enter night mode based on the signal from the light sensor and the daytime period. The control module issues a shutdown command to drive the geared motor 13 to operate, thereby shortening the telescopic controller 14 and smoothly closing the condenser panel 4 of the atmospheric water collection module to 0°, thus sealing the cavity 2. The position feedback sensor confirms in real time that the panel has reached the fully closed state and sends a signal back to the control module to ensure that the condenser panel 4 is closed normally.

[0055] Inside the greenhouse, the daytime temperature rises, heating the moisture-absorbing material 1. Upon heating, the water molecules adsorbed within the material gain sufficient energy to break free from the lithium chloride ions, transitioning from an adsorbed state to a free state. At night, the adsorbed moisture desorbs and diffuses from the pores of the material 1 as water vapor, releasing it into the air within the sealed cavity 2. When the water vapor comes into contact with the relatively cool inner surface of the condensing panel 4, condensation occurs, releasing latent heat. This latent heat is conducted through the condensing panel 4 to the finned heat sink on its outer side. The condensed water droplets gather on the surface of the condensing panel 4. The inner surface of the condensing panel 4 is treated with a hydrophilic coating (titanium dioxide nano-coating), which effectively reduces the water droplet contact angle, promoting rapid aggregation and sliding of the droplets. The condensed water collects along the inclined inner wall of the condensing panel 4.

[0056] 4. Co-generation using daytime temperature difference power generation mode.

[0057] When outdoor sunlight shines on the spectral adaptive coating 8, the spectral adaptive coating 8 is in a high absorption state during the day, absorbing sunlight and focused light, and the temperature rises sharply. The heat is conducted to the outside of the thermoelectric generator 7, at which time the outside of the thermoelectric generator 7 becomes the hot end.

[0058] Because the desorption process of the moisture-absorbing material 1 is an endothermic process, the inner side of the thermoelectric generator 7 continuously absorbs heat from the inner side of the thermoelectric generator 7, thus making the inner side of the thermoelectric generator 7 a cold end. The temperature difference between the hot and cold ends drives the Seebeck effect, enabling the thermoelectric generator module to continuously output electrical energy during the day.

[0059] The heat absorption of the hygroscopic material 1 during the desorption process helps to increase the temperature difference between the two sides of the thermoelectric generator 7, thereby improving the power generation efficiency. Meanwhile, the Peltier heat released at the cold end (inner side) during the power generation process directly provides the heat required for the desorption process, promoting faster and more thorough release of moisture. The water release process (i.e., the desorption process) of the hygroscopic material 1 is an endothermic process, continuously absorbing heat transferred from the hot end through the thermoelectric generator 7, maintaining a lower temperature at the cold end to preserve the temperature difference, and simultaneously providing the necessary heat for water release, thereby improving water release efficiency and enhancing the overall synergistic effect of water collection and power generation.

[0060] 5. Storage and utilization of condensate and electrical energy.

[0061] Condensate utilization: After the condensation panel 4 is turned on at night, the condensate collected during the day, along with the condensate that forms on the panel 4 at night, falls into the water collection trough 12 at the bottom of the greenhouse due to gravity. The water in the water collection trough 12 can be used for greenhouse irrigation. Irrigation can be based on signals from the soil moisture sensor or a timed strategy.

[0062] Power utilization: The electrical energy stored in battery 9 is used to continuously power the execution module, greenhouse data acquisition module, control module, and irrigation module, enabling the system to be self-driven. With a surplus of energy, it can also power other low-power greenhouse equipment.

[0063] In one embodiment, the control module includes: The physical water deficit determination unit, connected to the greenhouse data acquisition module, is used to determine the actual soil moisture content based on soil moisture data. The physical water deficit determination unit is also used to determine the physical water deficit based on the actual soil moisture content.

[0064] The cumulative evapotranspiration determination unit, connected to the greenhouse data acquisition module, is used to determine the actual water consumption intensity based on air temperature and humidity data. The cumulative evapotranspiration determination unit is also used to determine the cumulative evapotranspiration based on the actual water consumption intensity.

[0065] The supplementary irrigation instruction generation unit is connected to the physical water shortage determination unit and the cumulative evapotranspiration determination unit, respectively, and is used to generate supplementary irrigation instructions based on the relative deviation between the physical water shortage and the cumulative evapotranspiration.

[0066] The supplementary irrigation instruction generation unit includes: The judgment sub-unit is connected to the physical water shortage determination unit and the cumulative evapotranspiration determination unit, respectively, and is used to determine whether the relative deviation between the physical water shortage and the cumulative evapotranspiration is greater than the set allowable deviation threshold.

[0067] The instruction generation subunit, connected to the judgment subunit, is used to determine the target irrigation amount based on physical water shortage and cumulative evapotranspiration when the relative deviation is less than or equal to a set allowable deviation threshold, and to determine the irrigation duration based on the target irrigation amount, in order to generate a supplementary irrigation instruction. The instruction generation subunit is also used to take the cumulative evapotranspiration as the target irrigation amount and determine the irrigation duration based on the target irrigation amount when the relative deviation is greater than the set allowable deviation threshold, in order to generate a supplementary irrigation instruction.

[0068] For example, the microcontroller receives real-time signal data (i.e., environmental data) from sensors deployed in various zones of the greenhouse, including light intensity, air temperature, air humidity, and soil moisture. Simultaneously, the microcontroller uses wireless communication to transmit data, uploading the real-time collected environmental data and simulation results to the cloud or a central server. Users can view the real-time operating status of each area of ​​the greenhouse and historical system data via mobile devices or control panels.

[0069] After receiving environmental data, the microcontroller estimates the evapotranspiration potential in the greenhouse based on light data, air temperature data, air humidity data, and greenhouse type using the modified Penman-Monteith formula, and converts it into actual water consumption intensity by combining the current crop type and growth stage.

[0070] The cumulative evapotranspiration determination unit is used to apply the formula and formula The actual water consumption intensity is determined based on air temperature and humidity data.

[0071] In the formula, This indicates the actual water consumption intensity (unit: mm·d). -1 ), Represents the crop coefficient. This represents the reference crop evapotranspiration (i.e., indoor evapotranspiration potential, in mm·d). -1 ), This represents the slope of the saturated vapor pressure-temperature curve. This represents the net radiative flux across the crop canopy surface (in MJ·m). -2 ·d -1), Soil heat flux of crops (unit: MJ·m) -2 ·d -1 ), This represents the wet / dry constant (unit: kPa·℃). -1 ), This indicates the air temperature (in °C). This indicates wind speed (in this embodiment, it is the wind speed at a distance of two meters, in m / s). -1 ); This indicates a water vapor pressure deficit (unit: kPa). (Air humidity data, i.e., relative humidity) (Unit: %) This represents the canopy surface resistance of the crop (a value determined empirically in practical applications). This represents aerodynamic drag (a value determined empirically in practical applications). The greenhouse structure correction factor (pre-determined by the greenhouse span, ridge height, light transmittance, and ventilation rate; for example, 0.75~0.85 for multi-span greenhouses and 0.65~0.75 for solar greenhouses).

[0072] The global soil volumetric moisture content (i.e., the actual soil moisture content) is determined by the arithmetic mean of the soil volumetric moisture content of each zone in the greenhouse (determined based on soil moisture data).

[0073] The irrigation threshold is determined based on the lower limit of field capacity (DMC) set for different crop growth stages, and dynamically calibrated in conjunction with the depth of the main root activity layer. For example, the threshold during flowering and fruit setting is usually set at 65%–75% of DMC, and appropriately relaxed to 55%–65% during the seedling and maturity stages to prevent over-irrigation and maintain the optimal water-air ratio. When the overall soil volumetric moisture content drops to the set irrigation threshold, the irrigation program is triggered, and the target irrigation volume calculation begins.

[0074] To avoid irrigation errors caused by single sensor failure or localized spatial differences, a dual verification process using meteorological prediction models and soil sensor data is introduced to determine the final target irrigation amount. First, in the physical water deficit determination unit, the physical water deficit is calculated based on the difference between the actual soil moisture content and the target moisture content. The calculation formula is as follows: .

[0075] In the formula, This represents the physical water deficit, expressed in mm. The planned soil volumetric moisture content after irrigation is generally taken as 85% to 95% of the field capacity. The actual soil moisture content at the start of irrigation; This refers to the depth of the main active layer of the crop root system (in mm), which is related to the crop's growth stage. The irrigation water utilization coefficient is generally taken as 0.85~0.95.

[0076] Meanwhile, in the cumulative evapotranspiration determination unit, based on greenhouse micrometeorological data (i.e., greenhouse environmental data) from the period between the last irrigation and the triggering of this irrigation, the theoretical water consumption of the crop is calculated using the water balance equation, i.e., the cumulative evapotranspiration based on the Penman formula. The calculation formula is as follows: .

[0077] In the formula, This represents the cumulative evaporation.

[0078] Furthermore, the physical water shortage is calculated in the supplementary irrigation instruction generation unit. With cumulative evaporation relative deviation The calculation formula is as follows: .

[0079] when When the allowable deviation threshold is set to 15%, it indicates that the environmental data monitored by the sensor is in high agreement with the meteorological theoretical calculations, and the physical water shortage is taken. With cumulative evaporation The arithmetic mean of the values ​​is used as the target irrigation amount for this operation; when If this occurs, it indicates that the sensor probe may be clogged, aging, or there may be an anomaly in the surrounding microenvironment. At this point, the microcontroller generates an early warning message and uses meteorological theoretical calculations as a safety net output, specifically the cumulative evapotranspiration. The target irrigation amount is to prevent over-irrigation and flooding or extreme drought.

[0080] After determining the final target irrigation volume, the irrigation duration is calculated based on the hydraulic parameters of the irrigation module. Specifically, the formula is used. The irrigation duration is determined based on the target irrigation volume. In the formula, Indicates irrigation duration (in minutes). This indicates the target irrigation volume (in mm). This indicates the flow rate at the outlet of the solenoid valve in the irrigation module (unit: m³). 3 / h), This represents the total irrigated area (in m²). 2 ).

[0081] Finally, the microcontroller generates a supplementary irrigation command based on the irrigation duration and sends it to the irrigation module. The irrigation module then performs supplementary irrigation on the crops in the greenhouse according to the command.

[0082] After the supplementary irrigation command is issued, the microcontroller simultaneously monitors the liquid level in the water collection tank 12 of the water and energy storage module and the energy storage voltage of the battery 9. When the battery 9 has sufficient power to drive the operation and the condensate in the water collection tank 12 reaches the preset start-up level, the battery 9 discharges to drive the bistable pulse solenoid valve connected to the bottom of the water collection tank 12 to open. The water in the water collection tank 12 is then pumped to the micro-irrigation head and flows through the micro-irrigation network to the soil around the crop roots for precise irrigation. During irrigation, sensors installed in the greenhouse continuously transmit environmental data changes wirelessly back to the microcontroller, and the communication and control unit at the bistable pulse solenoid valve (i.e., the irrigation module includes the bistable pulse solenoid valve and the communication and control unit) synchronously feeds back the valve's action to the cloud or central server, and performs closed-loop feedback correction of the supplementary irrigation command accordingly. The communication and control unit includes wireless communication (such as Zigbee, LoRa, 4G communication, etc.) and a status detection circuit (determining whether the valve has completed its action through auxiliary contacts or current detection). After each action is executed, the action result (success / failure, actual valve open / closed state) is synchronously fed back to the microcontroller. The microcontroller compares the actual execution result of the valve with the preset command (i.e., the irrigation command), and dynamically adjusts the current irrigation action (continue / retry / stop) based on the comparison result (success / failure / abnormality), and continuously optimizes the irrigation duration. The bistable pulse solenoid valve internally encapsulates an H-bridge circuit, which consists of four electronic switches used to control the direction of the current flowing through the solenoid valve coil. When the liquid level in the collection tank 12 drops to the preset lower limit or the microcontroller issues a stop irrigation command, the battery discharges and sends power to the logic input of the driver chip in the H-bridge circuit, changing the logic combination of the input. Specifically, the pair of switches that were originally used to generate positive pulses are disconnected, and the other pair of switches that are used to generate reverse pulses are connected. This reverses the direction of the current flowing through the coil, and the polarity of the magnetic field inside the solenoid valve is reversed accordingly. This drives the valve core to switch from the open position to the closed position, thereby closing the valve, completing a single refill process, and automatically updating the work record in the cloud.

[0083] The cloud refers to a remote data center deployed on the internet, consisting of servers, databases, and a web service platform. The cloud and control module exchange data bidirectionally via wireless communication (4G, Wi-Fi, or LoRa gateway). The cloud's main functions include data storage, receiving real-time environmental data (light intensity, air temperature, air humidity, and soil moisture data, etc.) and irrigation records from the control module to form a time-series database. Remotely, users can log in to their account via a mobile app or web control panel to view detailed soil moisture information for crops in the greenhouse, equipment status (including the status of various sensors, geared motors, and condenser panels), historical curves (i.e., curves showing air temperature, air humidity, soil moisture data, irrigation frequency, and irrigation volume over historical periods), and early warning information.

[0084] In conjunction with the content of the above embodiments, this application has the following beneficial effects: 1. Utilizing the high humidity air generated by crop transpiration and soil evaporation in the greenhouse as a water source, the water vapor is converted into liquid water through nighttime moisture absorption and storage and daytime water release and condensation, thereby achieving greenhouse dehumidification and on-site water vapor recovery, supplementing irrigation water supply, and improving the efficiency of water resource recycling.

[0085] 2. Using the temperature difference between the inside and outside of the greenhouse as the basic power source, the system outputs electrical energy through thermoelectric generators and stores it in batteries, thereby reducing or avoiding the need for external power supply and improving the availability and reliability of the system in remote areas or areas with scarce power resources.

[0086] 3. Intelligent control is achieved through various sensors, enabling the system to maintain high energy acquisition efficiency and operational stability in different environments and regions, reducing manual intervention and operating energy consumption, and improving system adaptability.

[0087] 4. In this application, the heat release during the moisture absorption process and the heat absorption during the water release process are both coupled with the heat transfer path of the thermoelectric generator, thereby forming a synergistic mechanism in which water collection promotes power generation and power generation feeds back into water collection, thus improving water collection efficiency and energy utilization efficiency.

[0088] 5. The integrated design of atmospheric water collection module, thermoelectric power generation module, execution module, water and electricity storage module, greenhouse data acquisition module, control module and irrigation module facilitates installation, deployment and maintenance, and has good engineering application prospects.

[0089] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the processing procedures in the control module described above.

[0090] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the processing procedures in the control module described above.

[0091] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the processing procedures in the control module described above.

[0092] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A greenhouse self-driven atmospheric water collection and supplemental irrigation system, characterized in that, include: Atmospheric water collection module, thermoelectric power generation module, execution module, water and electricity storage module, greenhouse data acquisition module, control module, and irrigation module; The thermoelectric power generation module is mounted on top of the atmospheric water collection module; the atmospheric water collection module is inclinedly mounted on the top of the greenhouse; the execution module is mounted on the atmospheric water collection module; the water and electricity storage module is mounted on the greenhouse floor and is correspondingly mounted to the atmospheric water collection module; the water and electricity storage module is connected to the thermoelectric power generation module, the execution module, the greenhouse data acquisition module, and the irrigation module respectively; the control module is connected to the water and electricity storage module, the greenhouse data acquisition module, the irrigation module, and the execution module respectively. The atmospheric water collection module is used to collect moisture from the air inside the greenhouse and form condensate; the thermoelectric power generation module is used to convert the heat changes generated by the atmospheric water collection module in the process of collecting water vapor and the formation of condensate into electrical energy; the greenhouse data acquisition module is used to collect environmental data of the greenhouse; the control module is used to generate control commands based on the greenhouse environmental data; the execution module controls the opening or closing of the atmospheric water collection module based on the control commands; the water and electricity storage module is used to store the condensate and the electrical energy; the water and electricity storage module is also used to provide electrical energy to the execution module, the greenhouse data acquisition module, the control module, and the irrigation module; The control module is also used to generate a supplementary irrigation command based on the environmental data of the greenhouse; the irrigation module is used to supplement the irrigation of crops in the greenhouse using the condensate stored in the water and electricity storage module based on the supplementary irrigation command.

2. The greenhouse self-driven atmospheric water collection and supplemental irrigation system according to claim 1, characterized in that, The atmospheric water collection module includes: a moisture-absorbing material, a cavity, a heat sink, and a condensation panel; The thermoelectric power generation module is located on the outer side of the top panel of the cavity; the moisture-absorbing material is located on the inner side of the top panel of the cavity; the condensation panel is located below the cavity; the heat sink is located below the condensation panel; the condensation panel, the cavity, and the moisture-absorbing material form a sealed cavity.

3. The greenhouse self-driven atmospheric water collection and supplementary irrigation system according to claim 2, characterized in that, The execution module includes a geared motor and an opening / closing telescopic controller; The geared motor is mounted on the cavity; one end of the opening and closing telescopic controller is fixed on the condenser panel, and the other end is connected to the geared motor; the geared motor is connected to the water storage and power storage module and the control module respectively; The geared motor is used to control the opening and closing of the telescopic controller based on the control command, so as to control the opening or closing of the condenser panel.

4. The greenhouse self-driven atmospheric water collection and supplementary irrigation system according to claim 3, characterized in that, The environmental data of the greenhouse includes data on the location of the condenser panels, light intensity, air temperature, air humidity, and soil moisture. The greenhouse data acquisition module includes a location feedback sensor, a light sensor, a temperature and humidity sensor, and a soil moisture sensor; The position feedback sensor is mounted on the condenser panel; the light sensor is mounted inside the greenhouse; the temperature and humidity sensor is mounted inside the greenhouse; and the soil moisture sensor is mounted in the crop soil inside the greenhouse. The position feedback sensor is used to collect the position data of the condenser panel; the light sensor is used to collect the light data; the temperature and humidity sensor is used to collect the air temperature data and the air humidity data; and the soil moisture sensor is used to collect the soil moisture data.

5. The greenhouse self-driven atmospheric water collection and supplementary irrigation system according to claim 4, characterized in that, The control commands include on and off commands; the control module determines the control mode based on the illumination data; the control modes include night mode and day mode; In night mode, the control module generates the opening command based on the condenser panel position data; the execution module controls the opening of the condenser panel based on the opening command. In daytime mode, the control module generates the shutdown command based on the condenser panel position data; the execution module controls the condenser panel to close based on the shutdown command.

6. The greenhouse self-driven atmospheric water collection and supplemental irrigation system according to claim 1, characterized in that, The water and electricity storage module includes a battery, a charge and discharge controller, an inverter, and a water collection tank; The water collection tank is correspondingly set with the atmospheric water collection module; the battery is connected to the charge and discharge controller and the inverter respectively; the charge and discharge controller is connected to the thermoelectric power generation module; the inverter is connected to the control module, the execution module, the greenhouse data acquisition module and the irrigation module respectively.

7. The greenhouse self-driven atmospheric water collection and supplemental irrigation system according to claim 2, characterized in that, The thermoelectric power generation module includes an aluminum plate, a thermoelectric element, and a spectrally adaptive coating. The aluminum plate is disposed on the outer side of the top panel of the cavity; the thermoelectric generator is disposed on the aluminum plate; the spectral adaptive coating is adhered to the thermoelectric generator; The thermoelectric generator is connected to the water storage and energy storage module.

8. The greenhouse self-driven atmospheric water collection and supplemental irrigation system according to claim 4, characterized in that, The control module includes: The physical water deficit determination unit is connected to the greenhouse data acquisition module and is used to determine the actual soil moisture content based on the soil moisture data; the physical water deficit determination unit is also used to determine the physical water deficit based on the actual soil moisture content; The cumulative evapotranspiration determination unit, connected to the greenhouse data acquisition module, is used to determine the actual water consumption intensity based on the air temperature data and the air humidity data; the cumulative evapotranspiration determination unit is also used to determine the cumulative evapotranspiration based on the actual water consumption intensity. The supplementary irrigation instruction generation unit is connected to the physical water shortage determination unit and the cumulative evapotranspiration determination unit, respectively, and is used to generate the supplementary irrigation instruction based on the relative deviation between the physical water shortage and the cumulative evapotranspiration.

9. The greenhouse self-driven atmospheric water collection and supplemental irrigation system according to claim 8, characterized in that, The cumulative evaporation determination unit is used to employ the formula and formula The actual water consumption intensity is determined based on the air temperature data and the air humidity data. In the formula, Indicates actual water consumption intensity. Represents the crop coefficient. This represents the reference crop evapotranspiration. This represents the slope of the saturated vapor pressure-temperature curve. This represents the net radiative flux across the crop canopy surface. This represents the soil heat flux for crops. Represents the wet / dry constant. Indicates air temperature. Indicates wind speed. This indicates a water vapor pressure deficit. Indicates the canopy surface resistance of crops. Indicates aerodynamic drag. This represents the greenhouse structure correction factor.

10. The greenhouse self-driven atmospheric water collection and supplemental irrigation system according to claim 8, characterized in that, The supplementary irrigation instruction generation unit includes: The judgment subunit is connected to the physical water shortage determination unit and the cumulative evapotranspiration determination unit, respectively, and is used to determine whether the relative deviation between the physical water shortage and the cumulative evapotranspiration is greater than a set allowable deviation threshold. An instruction generation subunit, connected to the judgment subunit, is used to determine a target irrigation amount based on the physical water shortage and the cumulative evapotranspiration when the relative deviation is less than or equal to the set allowable deviation threshold, and to determine the irrigation duration based on the target irrigation amount, so as to generate the supplementary irrigation instruction; the instruction generation subunit is also used to take the cumulative evapotranspiration as the target irrigation amount when the relative deviation is greater than the set allowable deviation threshold, and to determine the irrigation duration based on the target irrigation amount, so as to generate the supplementary irrigation instruction.

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