A deep earth environment suitable plant screening and cultivation comprehensive experiment cabin and construction method

Abstract

The application discloses a kind of deep environment suitable for screening and cultivating comprehensive experimental cabin of plant and construction method, comprising: surrounding rock-structure coupling pressure-bearing cabin body, by waterproof concrete base layer, high-density polyethylene drainage layer, radon-proof heat insulation layer, buffer layer and pressure-bearing layer composite composition;Multiple coupling refrigeration system, integration initiative refrigeration unit, surrounding rock coupling thermal control and phase change cold storage device;Waste heat recovery and reuse system;Unmanned inspection system;And deep microenvironment simulation control system.The application relies on existing underground chamber engineering space, by surrounding rock-structure coupling pressure-bearing, multiple coupling refrigeration, deep microenvironment simulation control and waste heat recovery and reuse etc., construct can truly reproduce deep microclimate laboratory level platform, provide effective scheme for solving deep suitable for plant breeding technology bottleneck.

Description

Technical Field

[0001] This invention relates to the fields of underground space environmental engineering and plant cultivation technology, specifically to a comprehensive experimental chamber for screening and cultivating plants suitable for deep-earth environments and its construction method. Background Technology

[0002] Deep underground spaces, lacking contact with the natural environment, often evoke feelings of negativity and loss. Introducing plants into various underground spaces can both create spatial separation and improve the environmental quality, mitigating the negative physiological and psychological impacts of such environments. Underground spaces suffer from poor natural light and air circulation, requiring long-term reliance on artificial lighting, air conditioning, and ventilation systems. Suitable soil is also unavailable for local plant growth. Given the unique environmental characteristics of deep underground spaces, selecting plant varieties suitable for their growth and creating suitable plant landscapes is essential. Using artificial climate chambers for plant cultivation experiments is a common method.

[0003] Conventional artificial climate chambers primarily simulate the surface environment. Although they can control parameters such as temperature, humidity, light, and CO2, they lack the ability to simulate factors unique to deep-earth environments (such as constant darkness, radiation from surrounding rocks, the airtightness of underground spaces, and increased atmospheric pressure).

[0004] In the invention patent application number "ZL201911102345.7", a "closed experimental chamber system for simulating deep-earth agricultural environment" is disclosed. Although the technology provided can stably create a high-pressure environment at a depth of 0-2km in the laboratory environment, the plant lighting fixtures in the chamber will generate a lot of heat during operation. In order to simulate the constant temperature environment in the deep earth, the air conditioning system of the experimental chamber needs to be cooled all year round, which consumes a lot of energy.

[0005] In summary, existing experimental chamber systems suffer from technical problems such as difficulty in effectively simulating the unique environmental factors of deep earth and high energy consumption. Therefore, there is an urgent need to invent an energy-saving integrated experimental chamber for the screening and cultivation of plants adapted to deep earth environments, which is a problem that needs to be solved in this field. Summary of the Invention

[0006] In view of the above-mentioned technical problems of existing experimental chamber systems, the purpose of this invention is to provide "a comprehensive experimental chamber for screening and cultivating plants suitable for deep-earth environments, which can realistically simulate the characteristics of deep-earth high pressure, darkness, surrounding rock radiation and airtightness on the basis of energy saving, etc., and also provides a construction method for the comprehensive experimental chamber for screening and cultivating plants suitable for deep-earth environments, effectively overcoming the problems existing in the prior art".

[0007] To achieve the above objectives, the present invention provides a comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments, comprising: Rock-structure coupled pressure-bearing chamber: The rock-structure coupled pressure-bearing chamber is composed of a base layer, a drainage layer, a radon-proof heat insulation layer, a buffer layer, and a pressure-bearing layer. Multi-component coupled refrigeration system: The multi-component coupled refrigeration system integrates three parts: active refrigeration unit module, surrounding rock coupled thermal control module, and phase change cold storage device module. The three parts work together through pipelines, solenoid valves, circulating pumps and fan coil units. By switching pipeline solenoid valves, the active refrigeration unit module, surrounding rock coupled thermal control module and phase change cold storage device module can cooperate to operate in three working modes, which can regulate the internal temperature of the cabin. Waste heat recovery and reuse system: The waste heat recovery and reuse system is connected to the active refrigeration unit module and is used to recover low-grade waste heat; Unmanned inspection system: The unmanned inspection system is used to collect plant growth status and physiological indicators; Deep Earth Microenvironment Simulation and Control System: The deep earth microenvironment simulation and control system is used to monitor and regulate environmental indicators inside the cabin.

[0008] Furthermore, the drainage layer is laid on the periphery of the base layer, with one side having a concave-convex drainage groove and the other side having a honeycomb structure, with pre-set skeleton nails on each honeycomb wall; the buffer layer is laid on the periphery of the radon-proof and heat-insulating layer, and it is composed of several obliquely cut high-elasticity silicone pads spliced ​​together; the pressure-bearing layer is laid on the periphery of the buffer layer, and it is composed of several steel plates spliced ​​together.

[0009] Furthermore, the active refrigeration unit module is a variable frequency water-cooled chiller unit. The evaporator of the unit is connected in series with the water inlet of the fan coil unit installed inside the cabin via a water supply pipe. The fan coil unit is located inside the cabin and cools the air. The water outlet of the fan coil unit is connected to a return water pipe. The air supply side of the fan coil unit is connected to an air supply jacket that is close to the inner wall of the pressure layer. The cooled air is transported into the cabin through this air supply jacket.

[0010] Furthermore, the surrounding rock coupled thermal control module includes several heat exchange tubes, a water distributor, and a water collector; several boreholes are drilled in the surrounding rock, and the several heat exchange tubes are pre-embedded in the several boreholes respectively. One end of the several heat exchange tubes is connected in parallel with one end of the water distributor, and the other end of the water distributor is connected to the return water pipe. The other end of the several heat exchange tubes is connected in parallel with the water collector, and the other end of the water collector is connected to the return water pipe, thereby forming a circulation loop.

[0011] Furthermore, the phase change cold storage device module is used for cold storage. It is composed of multiple modular phase change cold storage encapsulation units connected in series and set at the bottom of the cabin. Its inlet and outlet are respectively connected to the outlet and inlet of the active refrigeration unit module. The modular phase change cold storage encapsulation unit includes an outer shell, a vacuum insulation panel, and a pipe heat exchanger. The vacuum insulation panel is wrapped around the outside of the outer shell for heat insulation. The pipe heat exchanger is installed inside the outer shell and is arranged in a U-shape inside the outer shell. The space between the pipe heat exchanger and the outer shell is filled by a phase change cold storage layer, which serves to firmly connect the pipe heat exchanger and the outer shell and to achieve effective cold storage.

[0012] Furthermore, the waste heat recovery and reuse system includes a heat recovery unit, a temperature-controlled variable frequency pump, an insulated pipe network, a phase change heat storage device, and heat-using terminals. The heat recovery unit is connected to an active refrigeration unit module. The heat transfer medium circulating inside the heat recovery unit is a high-boiling-point, thermally stable, and low-vapor-pressure ionic liquid. When the active refrigeration unit module is working, it releases heat, and a portion of this heat is captured by the parallel-connected heat recovery unit, raising the temperature of the ionic liquid. The temperature-controlled variable frequency pump is connected to the heat recovery unit. Through the temperature-controlled variable frequency pump, the heated ionic liquid is transported through the heat insulation net to the two ends of the phase change heat storage device for storage and the heat use terminal. The heating terminal is the heating terminal in the plant community growth chamber, which includes an underground heating coil installed in the soil of the cultivation bed, a warm air blower for raising the air temperature, and a heat exchanger for heating irrigation water; through temperature control and frequency conversion regulation, the soil, air and water temperature range required for plant growth is met.

[0013] Furthermore, the unmanned inspection module includes a first unmanned inspection unit and a second unmanned inspection unit.

[0014] The first inspection unit is used in a plant cultivation rack scenario. It includes a track frame, a first moving component, a second moving component, a telescopic component, a first multi-axis robotic arm, and a first acquisition component, all mounted on the track frame. The first multi-axis robotic arm is located at the end of the telescopic component. The first acquisition component is connected to the first multi-axis robotic arm. The first moving component, the second moving component, and the telescopic component work together to achieve movement along the X, Y, and Z axes, and can move the first acquisition component to a designated position to acquire plant parameters. The second inspection unit is used in the plant cultivation bed scenario. It includes a self-propelled chassis, a second multi-axis robotic arm, and a second data acquisition component. The self-propelled chassis can navigate autonomously and move along a preset path in the passageway between plant cultivation beds to reach a designated location. The second multi-axis robotic arm is mounted on a self-propelled chassis, and a second acquisition component is installed at the end of the second multi-axis robotic arm.

[0015] Furthermore, the deep-earth microenvironment simulation control system includes a monitoring unit, a data processing unit, and a double-layer truss structure control unit; The monitoring unit is used to monitor various environmental parameters of the cabin, plant cultivation rack and plant cultivation bed in real time. The monitoring unit includes a cabin monitoring module, a plant cultivation rack monitoring module and a plant cultivation bed monitoring module, which respectively monitor the temperature, humidity, carbon dioxide concentration and air pressure of the cabin, plant cultivation rack and plant cultivation bed in real time. The data processing unit is used to process the data collected by each sensor in the monitoring unit. First, the data processing unit filters the data collected by the sensor, then removes outliers to form valid data groups, and finally fuses and calculates to obtain control reference values. The double-layer truss structure control unit includes a control subunit and a first-layer truss structure and a second-layer truss structure that interact with the control subunit. The control subunit enables the raising and lowering of the first-layer truss structure and the second-layer truss structure.

[0016] Furthermore, the first-layer truss structure includes a first mounting bracket and a rhythm / plant dual-spectrum integrated luminaire. The first mounting bracket is grid-shaped and installed on the top of the cabin. The rhythm / plant dual-spectrum integrated luminaire is mounted on the first mounting bracket. The second-layer truss structure includes a control component and a second mounting bracket that interacts with the control component, an automatic rain curtain component, and a rainfall simulation component; the second mounting bracket is "U"-shaped and is located below the first mounting bracket and connected to the first mounting bracket; The automatic rain curtain assembly includes a first rain curtain and a second rain curtain, which are mounted on a second support. The rainfall simulation assembly is retractably laid on the second mounting support for spraying water onto the cultivation bed to simulate rainfall.

[0017] To achieve the above objectives, the present invention provides a construction method for a comprehensive experimental chamber for the screening and cultivation of plants adapted to deep-earth environments, which is based on the aforementioned comprehensive experimental chamber for the screening and cultivation of plants adapted to deep-earth environments, and is characterized by including the following steps: Step 1: Surrounding rock pretreatment: Drill holes in the surrounding rock according to the designed depth and spacing, pre-embed heat exchange pipes, fill with heat-conducting materials, and seal the borehole openings with polyurethane and apply waterproof coating. Step 2. Layered construction of the cabin: The waterproof concrete base layer is constructed in sequence, followed by the drainage layer, the radon-proof heat insulation layer, the elastic buffer layer, and finally the steel plate bearing layer is installed and fixed to the surrounding rock with connectors. Step 3. Installation of the bottom pressure-bearing interlayer and cold storage unit: Build a pressure-bearing interlayer at the bottom of the cabin, install a grid plate, place the pre-connected phase change cold storage encapsulation unit into the grid, and connect it to the evaporator piping of the active refrigeration unit; Step 4. Refrigeration System Installation: Install the variable frequency water-cooled chiller unit, fan coil unit, air supply jacket and related piping; connect the water collector and distributor to the surrounding rock heat exchange piping; complete the piping and valve connections between the phase change cold storage unit and the chiller unit; Step 5. Waste heat recovery system installation: Connect the heat exchanger of the heat recovery unit in parallel with the variable frequency water-cooled chiller unit, and lay ionic liquid circulation pipelines to the phase change heat storage device and the heat-using terminals such as the underground heating coil, the warm air blower, and the irrigation water heat exchanger in the cabin. Step 6. Installation of unmanned inspection system: Based on experimental requirements, select either the plant cultivation rack mode or the plant cultivation bed mode of the unmanned inspection system; Step 7. Installation of the microenvironment control system: Install various environmental sensors; for the cultivation bed mode, additionally install a liftable double-layer truss structure, dual-spectrum lighting, automatic rain curtains, and a simulated rainfall system; Step 8. Overall linkage commissioning: Conduct joint commissioning of each subsystem, test the airtightness of the cabin, pressure bearing capacity, temperature and humidity control accuracy, inspection path accuracy and waste heat recovery efficiency, and put it into operation after passing the test.

[0018] This invention provides a comprehensive experimental chamber and construction method for screening and cultivating plants adapted to deep-earth environments. It relies on technologies such as surrounding rock-structure coupled pressure bearing, multi-element coupled refrigeration, deep-earth microenvironment simulation control, and waste heat recovery and reuse to construct a laboratory-level replication platform for a realistic and energy-saving deep-earth microclimate, providing a feasible solution to the technical bottleneck of deep-earth adapted plant breeding. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a cross-sectional schematic diagram of the surrounding rock-structure coupled pressure chamber in the comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments. Figure 2 This is a schematic diagram of the multi-coupling refrigeration system in the comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments. Figure 3 This is a schematic diagram of the phase change cold storage device module in the comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments. Figure 4 This is a schematic diagram of the plant cultivation rack in the comprehensive experimental chamber for screening and cultivating plants suitable for deep-earth environments. Figure 5 This is a schematic diagram of the plant cultivation bed in the comprehensive experimental chamber for screening and cultivating plants suitable for deep-earth environments. Figure 6 This is a schematic diagram of the liftable double-layer truss structure in the comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments. Figure 7This is a schematic diagram of the rainfall simulation component in the comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments. Figure 8 This is a flowchart illustrating the construction method of the comprehensive experimental chamber for the screening and cultivation of plants adapted to deep-earth environments.

[0021] The following are the component labels in the attached diagram: 1. Surrounding rock 2. Base layer 3. Drainage layer 4. Radon-proof insulation layer 5. Buffer layer 6. Pressure-bearing layer 7. Frame nails 8. Fan coil unit 9. Air supply jacket 10. Pressure-bearing jacket 11. Water supply pipe 12. Return water pipe 13. Solenoid valve 14. Circulating pump 15. Variable frequency water-cooled chiller unit 16. Compressor 17. Drilling hole 18. Heat exchanger tube 19. Water distributor 20. Water collector 21. Heat-conducting layer 22. Insulation layer 23. Waterproof layer 24. Phase change cold storage device module 25. Pipe heat exchanger 27. Hydraulic extension 28. Retractable boom 29. First transverse truss beam 30. U-shaped truss beam 31. Liftable boom 32. First collection component 33. Plant cultivation rack 34. Plant cultivation bed 35. Self-propelled chassis 36. First mounting bracket 37. Rhythm / plant dual-spectrum integrated luminaire 37. Second mounting bracket 37. Third transverse support beam 37. Vertical connecting rod 38. Clamp support 39. First rain curtain 40. Second rain curtain 41. First boom 42. Last boom section 43. Rainwater pipe Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0023] Existing experimental chamber systems suffer from technical problems such as difficulty in effectively simulating the unique environmental factors of deep earth and high energy consumption. To address these issues, this invention provides a comprehensive experimental chamber for the screening and cultivation of plants adapted to deep earth environments. It utilizes technologies such as surrounding rock-structure coupling pressure bearing, multi-element coupling refrigeration, deep earth microenvironment simulation control, and waste heat recovery and reuse to construct a realistic and energy-efficient laboratory-level replication platform for deep earth microclimates. This provides a feasible solution to the technical bottleneck in the selection and breeding of plants adapted to deep earth environments. Furthermore, a corresponding construction and installation process is designed to effectively integrate with this patented device, ensuring its standardized installation and proper use.

[0024] The present invention provides a comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments, which includes a surrounding rock-structure coupled pressure chamber, a waste heat recovery and reuse system, an unmanned inspection system, and a deep-earth microenvironment simulation and control system.

[0025] The surrounding rock-structure coupled pressure chamber serves as the physical load-bearing structure of the experimental chamber. It integrates waterproofing, drainage, radon prevention, heat insulation, pressure bearing, and buffering functions, directly bearing the load of the deep-earth high-pressure surrounding rock and isolating it from the influence of the external geological environment.

[0026] The surrounding rock-structure coupled pressure chamber faces the internal space of the chamber from the surrounding rock wall. (See also:) Figure 1 It is composed of five layers in sequence: base layer 2, drainage layer 3, radon-proof and heat-insulating layer 4, buffer layer 5, and pressure-bearing layer 6.

[0027] Specifically, base layer 2 is the "foundation" of the entire cabin structure. It is a concrete base layer 2, and the main construction of the waterproof concrete base layer is preferably completed by the traditional concrete pouring method to ensure the stability of the concrete base layer.

[0028] Specifically, before pouring, polymer fibers can be added to the concrete to form polymer cement mortar. The polymer can form a crack-resistant and seepage-proof composite structure with cement. Its seepage resistance grade is ≥P10 and its strength grade is ≥C35, which can effectively improve tensile strength and waterproof performance.

[0029] After the concrete base layer is poured, a 30-50mm thick fine leveling layer is preferably formed on the side of the base layer facing the interior of the cabin using 3D staggered layer printing concrete technology. The surface flatness is controlled within ±2mm to eliminate unevenness of the base layer and ensure that the drainage layer, heat insulation layer, buffer layer and pressure-bearing layer laid later do not have hollowness or cracks.

[0030] This invention does not limit the implementation scheme for forming the leveling layer. At the same time, the thickness and surface flatness of the formed leveling layer can be determined according to the actual situation.

[0031] Meanwhile, for underground chamber projects with secondary lining already constructed, the secondary lining structure can also serve as a waterproof concrete base layer, but the aforementioned fine leveling layer still needs to be constructed on its surface using 3D printing technology and waterproofed.

[0032] This base layer provides a solid, flat, and waterproof reference surface for the laying of all subsequent functional layers.

[0033] Furthermore, the drainage layer 3 is an integrally formed drainage board. One side of the drainage board has a concave-convex drainage groove to guide any water that may seep in, forming the first drainage channel. The other side of the drainage layer 3 has a honeycomb structure, with pre-set skeleton nails 7 on each honeycomb wall.

[0034] This scheme does not limit the composition of the drainage layer 3, but preferably uses high-density polyethylene drainage board, which has the characteristics of high strength and strong compressive strength.

[0035] Meanwhile, the size of the drainage board is not limited. For example, its secondary width can be 2m, and its length can be customized into an integrated structure according to the perimeter of the cross-section of the underground chamber engineering space. In this way, the risk of leakage of the high-density polyethylene drainage layer is reduced by reducing lateral overlap.

[0036] The radon-proof insulation layer 4 is laid on one side of the honeycomb structure of the drainage layer 3 for insulation.

[0037] In this scheme, before laying the radon-proof heat insulation layer 4, it is preferable to first spray a waterproof coating on the honeycomb structure side of the drainage layer 3. This waterproof coating serves as a second waterproof barrier to prevent groundwater vapor intrusion.

[0038] For better waterproofing, it is recommended to use a high-polymer water-based permanent waterproof coating, and its thickness should preferably be no less than 3mm.

[0039] Furthermore, the honeycomb structure cavities are then filled with a filler material. After the filler material has cured and expanded to fill the entire honeycomb cavity, its surface is repaired. After the repair is completed, the radon-proof heat insulation layer 4 is then applied to the surface.

[0040] The preferred filler material in this design is polyurethane foam. Polyurethane foam can be injected into the honeycomb structure cavity through a high-pressure foaming machine for filling and curing. After curing, the surface is trimmed, and the surface flatness is controlled within ±2mm. During the filling process, the cured polyurethane foam wraps around the skeleton nails 7 on the honeycomb wall, forming a very strong mechanical interlocking structure, so that the drainage layer 3 and the radon-proof heat insulation layer 4 are firmly combined into a whole.

[0041] A buffer layer 5 is set around the radon insulation layer 4 to absorb and disperse the pressure of the pressure-bearing layer 6, protect the internal radon insulation layer 4 and drainage layer 3, and buffer the structural stress caused by temperature and pressure changes.

[0042] Specifically, the buffer layer 5 includes several highly elastic silicone pads, each with its edges beveled and spliced ​​together to form an elastic buffer layer.

[0043] Each silicone pad in the elastic buffer layer 5 has a 45-degree beveled edge, and the overlap of adjacent high elastic silicone pad edges is controlled to be no less than 20mm when splicing. This structure ensures that when subjected to high pressure from the pressure-bearing layer 6, the buffer layer 5 can be evenly stressed without rigid compression or misalignment at the joint.

[0044] A pressure-bearing layer 6 is set around the buffer layer 5. In this scheme, the pressure-bearing layer 6 is specifically manifested as several stainless steel plates, which are spliced ​​together to form a sealed pressure-bearing shell to withstand deep underground high pressure.

[0045] T-shaped reinforcing ribs are installed on the back of each stainless steel plate, which significantly improves the bending stiffness of the steel plate and prevents the steel plate from denting and deforming during pressurization in the cabin.

[0046] Meanwhile, silicone pads are pasted inside the grid formed by T-shaped reinforcing ribs, which together with the buffer layer form a double elastic buffer system to further ensure pressure resistance and eliminate the rigid release and gap between the steel plate and the elastic buffer layer 5, preventing the steel plate from denting when the cabin is under pressurization.

[0047] In addition, a single stainless steel plate is provided with a connection hole for locking through the connector anchored to the surrounding rock 1.

[0048] As an example, a single stainless steel plate is pre-drilled with bolt holes for bolts to pass through and anchor to the surrounding rock 1, and is tightened with nylon insert self-locking nuts to ensure the pressure-bearing performance of the hull.

[0049] Through the "coupling" of the above five-layer structure, the cabin not only has the ability to withstand deep underground high pressure, but also integrates composite functions such as waterproofing, drainage, radon insulation, and impact resistance, achieving collaborative work with the surrounding rock environment.

[0050] In order to achieve energy-saving and precise temperature control under the conditions of high insulation and high heat load in deep earth, this experimental chamber is also designed with a multi-coupling refrigeration system. As the core of environmental thermal control, it integrates three cold sources: active cooling, surrounding rock heat dissipation and phase change cold storage, and achieves energy-saving and precise temperature control through three switchable working modes.

[0051] For details, see Figure 2 The multi-coupling refrigeration system consists of three parts: an active refrigeration unit module, a surrounding rock coupling thermal control module, and a phase change cold storage device module. The three parts work together through pipelines, solenoid valves 13, circulating pumps 14, and fan coil units 8.

[0052] The active refrigeration unit module is a variable frequency water-cooled chiller unit 15. The evaporator of this unit is connected in series with the water inlet of the fan coil unit 8 installed inside the compartment via a water supply pipe 11. The water outlet of the fan coil unit 8 is connected to a return water pipe 12.

[0053] Specifically, the variable frequency water-cooled chiller unit 15 has its own evaporator. The evaporator is connected to one end of the water supply pipe 11, and the other end of the water supply pipe 11 is connected in series with the fan coil unit 8. The fan coil unit 8 is located inside the cabin. The air is cooled by the refrigerant compressed by the compressor 16.

[0054] Furthermore, the air supply side of the fan coil unit 8 is connected to an air supply jacket 9 that is tightly attached to the inner wall of the pressure layer 6, through which the cooled air is transported into the cabin.

[0055] Furthermore, the air supply jacket 9 is composed of a frame and a micro-perforated plate. The micro-perforated plate is set inside the frame and connected to the frame to form a uniform static pressure box. Thus, uniform air supply can be achieved through the micro-perforated plate.

[0056] The surrounding rock coupled thermal control module includes several heat exchange tubes 18, a water distributor 19, and a water collector 20.

[0057] Several boreholes 17 are drilled in the surrounding rock 1, and several heat exchange tubes 18 are pre-embedded in the several boreholes 17. One end of several heat exchange tubes 18 is connected in parallel with one end of water distributor 19, and the other end of water distributor 19 is connected to return water pipe 12. The other end of several heat exchange tubes 18 is connected in parallel with water collector 20, and the other end of water collector 20 is connected to return water pipe 12, thereby forming a circulation loop.

[0058] The gaps between several drill holes 17 and heat exchange tubes 18 are filled with a heat-conducting layer 21, which serves to securely connect the drill holes 17 and heat exchange tubes 18, and also provides some waterproofing, while effectively conducting heat.

[0059] The composition of the thermally conductive layer 21 is not limited in this scheme. For example, it can be thermally conductive putty, thermally conductive concrete or phase change thermally conductive slurry. The specific composition can be determined according to the actual situation.

[0060] In addition, the opening of the borehole 17 is sealed and insulated by a heat insulation layer 22, and waterproofed by a waterproof layer 23.

[0061] The phase change cold storage module 24 is used for cold storage. It consists of multiple modular phase change cold storage encapsulation units connected in series and located at the bottom of the cabin. Its inlet and outlet are connected to the outlet and inlet of the evaporator of the active refrigeration unit, respectively, and control valves are installed on the connecting pipes. Each modular phase change cold storage encapsulation unit includes an outer shell, a vacuum insulation panel, and a pipe heat exchanger 25.

[0062] Vacuum insulation panels are wrapped around the outside of the casing for thermal insulation; see [link / reference]. Figure 3 The pipe heat exchanger 25 is installed inside the shell and is arranged in a U-shape inside the shell.

[0063] The space between the pipe heat exchanger 25 and the outer shell is filled with a phase change cold storage layer, which serves to securely connect the pipe heat exchanger 25 to the outer shell and to effectively store cold.

[0064] Multiple phase change cold storage encapsulation units have press-fit quick couplings installed on the inlet and outlet of the pipe heat exchanger 25. The inlet and outlet of the pipe heat exchanger 25 are connected in series through quick couplings to form a phase change cold storage group, which is placed at the bottom of the chamber.

[0065] A pressure-bearing interlayer 10 is provided at the bottom of the cabin. The pressure-bearing interlayer 10 includes an upper top plate and a lower bottom plate. A grid plate is provided between the upper top plate and the lower bottom plate. The independent compartments divided by the grid plate are used to fix and house each phase change cold storage encapsulation unit.

[0066] The non-coupled refrigeration system, which is composed of the above-mentioned multi-active refrigeration unit module, surrounding rock coupling thermal control module, and phase change cold storage device module, can operate in the following three modes by automatically or manually switching pipeline solenoid valves through the control system.

[0067] Mode 1 (Natural Cooling Mode of Surrounding Rock): When the cooling load inside the cabin is small, only the surrounding rock-coupled thermal control module intervenes. The circulation pump connected to the water distributor 19, water collector 20, and return water pipe 12 is turned on.

[0068] Cooling water flows within the heat exchange tubes 18 of the borehole 17 in the surrounding rock, transferring heat to the deep surrounding rock 1 (a natural heat sink) at a constant temperature. After cooling down, the water enters the chamber through the return water pipe 12 and the fan coil unit 8. The warm water, having absorbed heat, returns to the surrounding rock heat exchange tubes 18 through the return water pipe 12, completing the cycle.

[0069] In this mode, neither the active refrigeration unit module nor the phase change cold storage device module works, resulting in extremely low energy consumption.

[0070] Mode 2 (Surrounding Rock + Active Cooling Synergistic Mode): When the cooling load inside the cabin increases and Mode 1 cannot meet the cooling requirements, the surrounding rock-coupled thermal control module and the active cooling unit module will intervene simultaneously.

[0071] The cooling water first absorbs heat through the fan coil unit 8 inside the cabin, and then enters the surrounding rock-coupled thermal control module through the return water pipe 12 for primary cooling (pre-cooling). The pre-cooled water then enters the evaporator of the active chiller module through the return water pipe 12 for secondary deep cooling. The cooled chilled water then enters the fan coil unit 8 again through the supply water pipe 11 to absorb heat.

[0072] This mode makes full use of the heat dissipation capacity of the surrounding rock 1, and significantly reduces the compressor energy consumption and temperature range of the active refrigeration unit module.

[0073] Mode 3: (Surrounding rock + phase change cold storage peak and valley regulation mode): operates in combination with electricity price policy and cold load peak and valley conditions.

[0074] Cold storage phase (off-peak electricity demand): The active refrigeration unit module operates, but the cooling capacity generated is not directly used for cabin cooling. Through valve switching, the low-temperature medium flowing out of the unit's evaporator enters the phase change cold storage device module at the bottom of the cabin, flows in the pipe heat exchanger 25 of the phase change cold storage encapsulation unit, absorbs heat from the phase change cold storage material, causes it to undergo a phase change, and stores the cold capacity.

[0075] Cooling Phase (Peak Electricity Consumption Period): The active chiller module shuts down. The surrounding rock-coupled thermal control module and the phase change cold storage device module simultaneously engage. After absorbing heat through the in-cabin fan coil unit 8, the cooling water first flows through the surrounding rock-coupled thermal control system for pre-cooling, and then flows through the phase change cold storage device module to exchange heat with the cold storage material undergoing reverse phase change, thus undergoing secondary deep cooling. The cooled chilled water is then returned to the fan coil unit 8 to absorb heat.

[0076] This model achieves peak shaving and valley filling, significantly reducing operating electricity costs.

[0077] To improve energy efficiency, this experimental chamber also integrates a waste heat recovery and reuse module. This module recovers, upgrades, and reuses the low-grade waste heat continuously discharged from the variable frequency water-cooled chiller unit 15 during operation. The waste heat recovery and reuse module includes a heat recovery unit, a temperature-controlled variable frequency pump, an insulated piping network, a phase change heat storage device, and heat-using terminals.

[0078] Specifically, the heat recovery unit is connected to a variable frequency water-cooled chiller unit, and the heat transfer medium circulating inside the heat recovery unit is an ionic liquid with a high boiling point, thermal stability, and low vapor pressure.

[0079] When the variable frequency water-cooled chiller unit 15 is working, it releases heat. Some of this heat is captured by the parallel heat recovery unit, which raises the temperature of the ionic liquid.

[0080] The temperature-controlled variable frequency pump is connected to the heat recovery unit. Through the temperature-controlled variable frequency pump, the heated ionic liquid is transported through the insulation net to the two ends: the phase change heat storage device and the heat use terminal.

[0081] Phase change thermal storage devices are used for the temporary storage of heated ionic liquids.

[0082] When there is a surplus of heat, the valve is switched to transfer the heat to the phase change heat storage device; when there is a shortage of heat, the heat in the heat storage device is used.

[0083] The heating terminals are located in the plant community growth chamber and include buried heating coils installed in the soil of the cultivation bed, a warm air blower for raising the air temperature, and a heat exchanger for heating irrigation water.

[0084] The system uses temperature control and frequency conversion to prioritize the soil, air, and water temperature range required for plant growth.

[0085] To enable long-term, continuous, and automated monitoring of plant growth under closed, high-pressure environments, this legislation also provides an unmanned inspection module. The unmanned inspection module includes a first unmanned inspection unit and a second unmanned inspection unit.

[0086] The first inspection unit is used in the plant cultivation rack 32 scene, and includes a track frame, a first moving component, a second moving component, a telescopic component, a first multi-axis robotic arm, and a first acquisition component.

[0087] See Figure 4 The track frame includes several hydraulic telescopic booms 27, which are vertically installed on the steel structure load-bearing beams on the top of the cabin. The telescopic booms 27 can extend upward or downward, allowing the entire first inspection unit to be lowered to the approximate height of the target.

[0088] The hydraulic telescopic boom 27 provides macroscopic position adjustment of the entire first inspection unit in the Z-axis direction, enabling it to adapt to plant cultivation racks 32 of different heights. When the first inspection unit is not in use, the entire movable part can be raised to the top of the cabin without occupying the operating space below.

[0089] The first moving component is used to realize the movement along the X-axis during inspection, and it includes several first transverse truss beams 28 and several loop-shaped frame beams 29.

[0090] Several first transverse truss beams 28 are arranged in parallel, with their two ends connected to hydraulic telescopic booms 27 respectively. The upper surface of each first transverse truss beam 28 is provided with a first slide rail along its entire length, and the side surface of each first transverse truss beam 28 is provided with a first toothed rail along its entire length. The first transverse truss beams 28 constitute the reference track beam for the system to move in the X-axis direction.

[0091] The U-shaped frame beam 29 is composed of two second transverse truss beams and two longitudinal truss beams connected end to end, forming a rectangular ring structure.

[0092] Multiple first sliders are provided on the lower surface of each second transverse truss beam, and the inner groove contour of the first slider is precisely matched with the cross-sectional shape of the first slide rail on the first transverse truss beam.

[0093] A first geared motor is installed at any suitable location on the U-shaped frame beam 29 (e.g., on the side of a second transverse truss beam), and a first gear is installed on the output shaft of the first geared motor, which maintains precise engagement with a first gear rail on the first transverse truss beam.

[0094] The U-shaped frame beam 29 is positioned above the first transverse truss beam 28, ensuring that all the first sliders accurately engage with their corresponding first slide rails. When the first geared motor is energized and rotates, its output shaft drives the first gear to rotate. Since the first gear meshes with the stationary first gear, and the first geared motor is fixed to the U-shaped frame beam, the rotation of the first gear translates into linear movement of the first geared motor and the U-shaped frame beam along the first gear rail (i.e., the X-axis direction). By controlling the rotation direction and speed of the first geared motor, the direction and speed of movement can be controlled.

[0095] Each longitudinal truss beam has upper and lower sliding rails installed along its entire length on its upper and lower surfaces. Simultaneously, a second toothed rail is installed along its entire length on the outer surface of each longitudinal truss beam.

[0096] The longitudinal truss beam moves along the X-axis together with the loop-shaped frame beam, and itself serves as the support track for the subsequent Y-axis moving mechanism.

[0097] The second moving component is used to realize the Y-axis movement during inspection. It includes a clamp-type structure, which is set on the longitudinal truss beam and can move along the longitudinal truss beam to realize the Y-axis movement during inspection.

[0098] The main body of the clamp-type structure is a rectangular frame, and the internal space of the frame is equipped with a horizontal partition that divides the rectangular frame into an upper cavity and a lower cavity.

[0099] Multiple second sliders are installed on the top inner wall of the upper cavity and the bottom inner wall of the lower cavity, respectively. Several third sliders are vertically installed on the four inner side walls of the clamp-type structure.

[0100] A second geared motor and a third geared motor are respectively installed on the outside of any side wall of the clamp-type structure. A second gear is installed on the output shaft of the second geared motor, and a third gear is installed on the output shaft of the third geared motor.

[0101] The hollow portion of the clamp-like structure is fitted onto the longitudinal truss beam of the U-shaped frame beam. This allows the second slider within the upper cavity of the clamp-like structure to contact and engage with the upper sliding rail on the upper surface of the longitudinal truss beam; simultaneously, the second slider within the lower cavity contacts and engages with the lower sliding rail on the lower surface of the longitudinal truss beam. This "upper and lower clamp" slider arrangement allows the clamp-like structure to be securely held onto the longitudinal truss beam and to slide freely only along its length direction (i.e., the Y-axis direction).

[0102] When the second geared motor is powered on and rotates, its second gear meshes with the second toothed rail fixed to the side of the longitudinal truss beam, driving the entire clamp-type structure to move precisely along the Y-axis.

[0103] The telescopic assembly is used to achieve precise movement along the Z-axis during inspection. It is a liftable boom 30, which has two vertical third slide rails installed along its entire length on one pair of opposite sides and a third toothed rail installed along its entire length on another pair of opposite sides.

[0104] The liftable boom 30 is passed through the hollow interior of the clamp-type structure from top to bottom, ensuring that the third slide rail on the liftable boom 30 engages one-to-one with the third slider on the inner wall of the clamp-type structure. At the same time, it is ensured that the third gear rail on the liftable boom 30 precisely meshes with the third gear driven by the output shaft of the third reduction motor mounted on the clamp-type structure.

[0105] When the third geared motor is powered on and rotates, it drives the lifting boom 30 to move vertically (i.e., in the Z-axis direction) relative to the clamp-type structure and the entire U-shaped frame beam through the meshing of the third gear and the third gear.

[0106] A first multi-axis robotic arm is installed at the lower end of the liftable boom 30, and a first data acquisition component 31 is installed at the end of the first multi-axis robotic arm. The position and posture of the first data acquisition component 31 at the end of the first multi-axis robotic arm can be adjusted through the first multi-axis robotic arm to complete the acquisition of plant data.

[0107] This solution does not limit the composition of the first acquisition component 31. Specifically, this solution includes an image acquisition module and a physiological index measuring instrument, which can acquire high-definition images of plants and collect physiological data such as chlorophyll content and photosynthetic rate.

[0108] The first inspection unit, constructed using the above scheme, has a hydraulic telescopic boom 27 that allows adjustment of the initial height of the entire unit. A first geared motor drives the U-shaped frame beam to move horizontally along the first transverse truss beam 28 along the X-axis. A second geared motor drives the clamp-type structure to move horizontally along the longitudinal truss beam along the Y-axis. A third geared motor drives the liftable boom 30 to move vertically along the Z-axis. Through this three-axis movement, the first multi-axis robotic arm can precisely position any plant sample on any layer of the plant cultivation rack. Subsequently, the first multi-axis robotic arm's own small-range fine movements adjust the position and orientation of the image acquisition module and the physiological index measuring instrument, completing the acquisition of high-definition images, chlorophyll content, photosynthetic rate, and other physiological data.

[0109] The second inspection unit is used in scenario 33 of the plant cultivation bed. See below. Figure 5 It includes a self-propelled chassis 34, a second multi-axis robotic arm, and a second acquisition component.

[0110] The self-propelled chassis 34 can navigate autonomously and move along a preset path within the passageway between plant cultivation beds 33 to reach the designated location.

[0111] The second multi-axis robotic arm is mounted on the self-propelled chassis 34, and the end of the second multi-axis robotic arm is equipped with a second acquisition component.

[0112] The second multi-axis robotic arm and the second acquisition component have the same configuration scheme as the first multi-axis robotic arm and the first acquisition component in the first inspection unit, so they will not be described in detail here.

[0113] The second inspection unit, constructed using the above scheme, moves along a preset path on its self-propelled chassis 34 within the passageway between the plant cultivation beds 33. Upon reaching the designated monitoring point, the second multi-axis robotic arm extends, inserting the second data acquisition module into different locations within the cultivation bed 33, near the plant canopy or leaves, to collect data.

[0114] The deep-earth microenvironment simulation and control system is the "brain" and "sensory system" of the experimental chamber. It is responsible for monitoring environmental parameters inside the chamber in real time and automatically adjusting relevant actuators according to preset plant growth models or experimental plans to stabilize the environment inside the chamber within the target range. The deep-earth microenvironment simulation and control system includes a monitoring unit, a data processing unit, and a double-layer truss structure control unit.

[0115] The monitoring unit is used to monitor various environmental parameters of the cabin, plant cultivation racks, and plant cultivation beds in real time. The monitoring unit includes a cabin monitoring module, a plant cultivation rack monitoring module, and a plant cultivation bed monitoring module.

[0116] The cabin monitoring module includes environmental parameter monitoring sensors such as air temperature sensor, humidity sensor, carbon dioxide concentration sensor, and air pressure sensor, which monitor the temperature, humidity, carbon dioxide concentration, and air pressure inside the cabin in real time.

[0117] To ensure accuracy, it is preferable to install no fewer than three of each type of sensor. This solution does not impose any restrictions on the number of sensors or their installation locations; the specific requirements can be determined based on the actual situation.

[0118] For example, five temperature sensors can be arranged at the four corners and center of the cabin, a layout that can evenly cover and avoid the air vents.

[0119] Five humidity sensors can be arranged at the four corners and center of the cabin, installed side by side with the temperature sensors.

[0120] Nine carbon dioxide concentration sensors can be arranged at the four corners, center, top, and bottom of the cabin. Since carbon dioxide is denser than air, sensors must be placed at the bottom and top.

[0121] Three sensors for monitoring environmental parameters such as air pressure can be arranged in the center of the cabin as backups for each other.

[0122] The plant cultivation rack monitoring module includes several light sensors, which are distributed and installed on each layer of the cultivation rack (i.e., each layer where plants grow).

[0123] This solution does not limit the number or installation location of the light sensors. Specifically, this solution involves installing three light sensors on each of the 32-layer cultivation racks, located at both ends and the middle of the layer, thus ensuring even coverage.

[0124] The plant cultivation bed monitoring module includes uprights, a light sensor, and a wind speed monitoring sensor.

[0125] The support poles are installed inside the cultivation bed 33, with the bottom of the poles inserted into the soil or fixed to the side frame of the bed. A wind speed monitoring sensor is installed at the top of the support poles.

[0126] This solution does not limit the number or installation location of light sensors and wind speed monitoring sensors; the specific requirements can be determined based on the actual situation.

[0127] The data processing unit is used to process the data collected by each sensor in the monitoring unit. First, the data processing unit filters the data collected by the sensor, then removes outliers to form valid data groups, and finally fuses and calculates to obtain the control reference value.

[0128] For example, at least three of each type of monitoring sensor are installed, and the data processing unit sets a deviation threshold ▽R0 for each sensor. At any given sampling time, the monitoring data from n sensors of the same type are sorted, and the median is taken as the reference value Ri. Then, the difference ▽Ri between each sensor's data and the reference value is calculated. Only when |▽Ri| ≤ ▽R0 is the data from that sensor adopted. Finally, the arithmetic mean of all adopted data is calculated and used as the final monitoring value of the environmental parameter for control decisions. This data fusion processing method greatly improves the reliability and anti-interference capability of monitoring.

[0129] The double-layer truss structure control unit includes a control subunit and a first-layer truss structure and a second-layer truss structure that interact with the control subunit. The control subunit enables the lifting and lowering of the first-layer truss structure and the second-layer truss structure.

[0130] The lifting structure between the first and second truss structures is well known to those skilled in the art. As an example, the lifting of the first and second truss structures is achieved by using a drive motor to drive a chain and gears. This solution does not limit the lifting structure; the specific method can be determined according to the actual situation.

[0131] See Figure 6 The first-layer truss structure includes a first mounting bracket 35 and a rhythm / plant dual-spectrum integrated light fixture 36. The first mounting bracket 35 is grid-shaped and located above the cultivation bed 33, and is installed on the top of the cabin. The rhythm / plant dual-spectrum integrated light fixture 36 is mounted on the first mounting bracket 35.

[0132] The second-layer truss structure includes a control component and a second mounting bracket 37 that interacts with the control component, an automatic rain curtain component, and a rainfall simulation component.

[0133] See Figure 7, the second mounting bracket 37 is in a "square" shape and arranged below the first mounting bracket 35, which serves as a carrier of the rainfall simulation system. It comprises two third transverse support beams 371 and vertical connecting rods 372, wherein the two third transverse support beams 371 are arranged in parallel and connected to the first mounting bracket 35 via vertical connecting rods 272, thereby forming a double-layer truss structure.

[0134] A hoop support 38 capable of sliding along the axial direction of the third transverse support beam 371 is installed on the third transverse support beam 371, and is used for matching connection with a rainfall simulation assembly.

[0135] The automatic rain shielding curtain assembly comprises a first rain shielding curtain 39 and a second rain shielding curtain 40, two ends of the first rain shielding curtain 39 are arranged on supports at two ends of one third transverse support beam 371, and two ends of the second rain shielding curtain 40 are respectively arranged between the two third transverse support beams 371 and connected with end supports of the two third transverse support beams 371.

[0136] It should be noted herein that according to test requirements, the lifting of the first rain shielding curtain 39 and the second rain shielding curtain 40 can be independently controlled to realize local or overall rain shielding, moisture preservation or light shielding treatment.

[0137] The rain shielding curtain herein is made of an impermeable material, and automatic lifting is realized by driving a winding pipe through a tubular motor. The specific solution is well known to those skilled in the art, and will not be described in detail herein.

[0138] The rainfall simulation assembly comprises a multi-section hinged hanging rod, a reciprocating sliding member and a rainfall water pipe 43.

[0139] Two ends of a first hanging rod 41 of the multi-section hinged hanging rod are fixed on the two third transverse support beams 371 arranged in parallel, and a last hanging rod 42 is provided with the reciprocating sliding member.

[0140] Each hinged joint on the multi-section hinged hanging rod is hinged to the hoop support 38 on the third transverse support beam 371.

[0141] The simulated rainfall water pipe 43 is provided with a plurality of nozzles, and is fixed on the multi-section hinged hanging rod via the hoop support 38.

[0142] When rainfall needs to be simulated, the reciprocating sliding device drives the last hanging rod 42 to move outwards, drives the entire multi-section hinged hanging rod to be uniformly unfolded, so that the simulated rainfall water pipe covers the entire upper part of the culture bed 33. A water pump supplies water to the rainfall water pipe 43, and the nozzles spray water.

[0143] After the rainfall is finished, the reciprocating sliding device moves reversely to fold the multi-section hinged hanging rod, so as to avoid blocking light.

[0144] The comprehensive experimental cabin for screening and cultivating suitable plants in deep underground environment formed by the above scheme, see Figure 8The present invention also provides a construction method for the above-mentioned experimental chamber, comprising the following steps performed in sequence: Step 1: Surrounding rock pretreatment: Drill holes 17 in the surrounding rock 1 according to the designed depth and spacing, pre-embed U-shaped PE-RT heat exchange pipes 18, fill with heat-conducting material, and seal the opening of the drill holes 17 with polyurethane and apply waterproof coating.

[0145] Step 2. Layered construction of the cabin: Construct the waterproof concrete base layer 2 in sequence, lay the high-density polyethylene drainage layer 3, construct the radon-proof heat insulation layer 4, lay the elastic buffer layer 5, and finally install the steel plate bearing layer 6 with T-shaped reinforcing ribs, and fix it to the surrounding rock 1 with anchor bolts and nylon self-locking nuts.

[0146] Step 3. Installation of the bottom pressure-bearing interlayer and cold storage unit: Construct a pressure-bearing interlayer 10 at the bottom of the cabin, install a grid plate, place the pre-connected phase change cold storage encapsulation unit into the grid, and connect it to the evaporator pipeline of the active refrigeration unit 15.

[0147] Step 4. Refrigeration system installation: Install the variable frequency water-cooled chiller unit 15, fan coil unit 8, air supply jacket 9 and related pipelines; connect the water collector 20 and water distributor 19 to the surrounding rock heat exchange pipeline; complete the pipeline and valve connection between the phase change cold storage unit and the chiller unit. Step 5. Waste heat recovery system installation: Connect the heat exchanger of the heat recovery unit in parallel with the condenser 15 of the chiller unit, and lay the ionic liquid circulation pipeline to the phase change heat storage device and the heat-using terminals such as the underground heating coil, the warm air blower, and the irrigation water heat exchanger in the cabin. Step 6. Installation of unmanned inspection system: Based on experimental requirements, select either the plant cultivation rack mode or the plant cultivation bed mode of the unmanned inspection system; Step 7. Installation of the microenvironment control system: Install various environmental sensors; for the cultivation bed mode, additionally install a liftable double-layer truss structure, dual-spectrum lamps 36, automatic rain curtains and a simulated rainfall system; Step 8. Overall linkage commissioning: Conduct joint commissioning of each subsystem, test the airtightness of the cabin, pressure bearing capacity, temperature and humidity control accuracy, inspection path accuracy and waste heat recovery efficiency, and put it into operation after passing the test.

[0148] The comprehensive experimental chamber and construction method for screening and cultivating plants suitable for deep-earth environments provided in this solution have the following advantages over existing technologies: 1. Realistically recreates the deep-earth environment: Based on existing underground chambers, combined with the surrounding rock-structure coupled pressure chamber and deep-earth microenvironment simulation control system, it can realistically simulate the characteristics of deep-earth high pressure, darkness, surrounding rock radiation and airtightness.

[0149] 2. Significantly reduce energy consumption: Make full use of the surrounding rock as a natural heat dissipation body, and combine it with the phase change cold storage device to "shave peaks and fill valleys", which greatly reduces the workload and operating electricity cost of the active chiller unit.

[0150] 3. Cascaded utilization of energy: Low-grade waste heat generated from refrigeration is used for thermal environment regulation required for plant growth through a waste heat recovery system, thereby achieving efficient recycling of energy.

[0151] 4. High degree of automation: It integrates an unmanned inspection system and a multi-environmental parameter intelligent control system, reducing manual intervention and improving the continuity and accuracy of experimental data.

[0152] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments, characterized in that, It includes Rock-structure coupled pressure-bearing chamber: The rock-structure coupled pressure-bearing chamber is composed of a base layer, a drainage layer, a radon-proof heat insulation layer, a buffer layer, and a pressure-bearing layer. Multi-component coupled refrigeration system: The multi-component coupled refrigeration system integrates three parts: active refrigeration unit module, surrounding rock coupled thermal control module, and phase change cold storage device module. The three parts work together through pipelines, solenoid valves, circulating pumps and fan coil units. By switching pipeline solenoid valves, the active refrigeration unit module, surrounding rock coupled thermal control module and phase change cold storage device module can cooperate to operate in three working modes, which can regulate the internal temperature of the cabin. Waste heat recovery and reuse system: The waste heat recovery and reuse system is connected to the active refrigeration unit module and is used to recover low-grade waste heat; Unmanned inspection system: The unmanned inspection system is used to collect plant growth status and physiological indicators; Deep Earth Microenvironment Simulation and Control System: The deep earth microenvironment simulation and control system is used to monitor and regulate environmental indicators inside the cabin.

2. The comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments according to claim 1, characterized in that, The drainage layer is laid on the periphery of the base layer, with one side having a concave-convex drainage groove and the other side having a honeycomb structure, with pre-set skeleton nails on each honeycomb wall; the buffer layer is laid on the periphery of the radon-proof and heat-insulating layer, and it is composed of several obliquely cut high-elasticity silicone pads spliced ​​together; the pressure-bearing layer is laid on the periphery of the buffer layer, and it is composed of several steel plates spliced ​​together.

3. The comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments according to claim 1, characterized in that, The active refrigeration unit module is a variable frequency water-cooled chiller unit. The evaporator of the unit is connected in series with the water inlet of the fan coil unit installed inside the cabin through a water supply pipe. The fan coil unit is located inside the cabin and cools the air. The water outlet of the fan coil unit is connected to a return water pipe. The air supply side of the fan coil unit is connected to an air supply jacket that is close to the inner wall of the pressure layer. The cooled air is transported into the cabin through the air supply jacket.

4. The comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments according to claim 1, characterized in that, The surrounding rock coupled thermal control module includes several heat exchange tubes, a water distributor, and a water collector. Several boreholes are drilled in the surrounding rock, and the heat exchange tubes are pre-embedded in the boreholes. One end of each heat exchange tube is connected in parallel with one end of the water distributor, and the other end of the water distributor is connected to the return water pipe. The other end of each heat exchange tube is connected in parallel with the water collector, and the other end of the water collector is connected to the return water pipe, thus forming a circulation loop.

5. The comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments according to claim 1, characterized in that, The phase change cold storage device module is used for cold storage. It is composed of multiple modular phase change cold storage encapsulation units connected in series and set at the bottom of the cabin. Its inlet and outlet are respectively connected to the outlet and inlet of the active refrigeration unit module. The modular phase change cold storage encapsulation unit includes an outer shell, a vacuum insulation panel, and a pipe heat exchanger. The vacuum insulation panel is wrapped around the outside of the outer shell for heat insulation. The pipe heat exchanger is installed inside the outer shell and is arranged in a U-shape inside the outer shell. The space between the pipe heat exchanger and the outer shell is filled by a phase change cold storage layer, which serves to firmly connect the pipe heat exchanger and the outer shell and to achieve effective cold storage.

6. The comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments according to claim 1, characterized in that, The waste heat recovery and reuse system includes a heat recovery unit, a temperature-controlled variable frequency pump, an insulated pipe network, a phase change heat storage device, and heat-using terminals. The heat recovery unit is connected to an active refrigeration unit module. The heat transfer medium circulating inside the heat recovery unit is a high-boiling-point, thermally stable, and low-vapor-pressure ionic liquid. When the active refrigeration unit module is working, it releases heat, and a portion of this heat is captured by the parallel heat recovery unit, raising the temperature of the ionic liquid. The temperature-controlled variable frequency pump is connected to the heat recovery unit. Through the temperature-controlled variable frequency pump, the heated ionic liquid is transported through the heat insulation net to the two ends of the phase change heat storage device for storage and the heat use terminal. The heating terminal is the heating terminal in the plant community growth chamber, which includes an underground heating coil installed in the soil of the cultivation bed, a warm air blower for raising the air temperature, and a heat exchanger for heating irrigation water; through temperature control and frequency conversion regulation, the soil, air and water temperature range required for plant growth is met.

7. The comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments according to claim 1, characterized in that, The unmanned inspection module includes a first unmanned inspection unit and a second unmanned inspection unit; The first inspection unit is used in a plant cultivation rack scenario. It includes a track frame, a first moving component, a second moving component, a telescopic component, a first multi-axis robotic arm, and a first acquisition component, all mounted on the track frame. The first multi-axis robotic arm is located at the end of the telescopic component. The first acquisition component is connected to the first multi-axis robotic arm. The first moving component, the second moving component, and the telescopic component work together to achieve movement along the X, Y, and Z axes, and can move the first acquisition component to a designated position to acquire plant parameters. The second inspection unit is used in the plant cultivation bed scenario. It includes a self-propelled chassis, a second multi-axis robotic arm, and a second data acquisition component. The self-propelled chassis can navigate autonomously and move along a preset path in the passageway between plant cultivation beds to reach a designated location. The second multi-axis robotic arm is mounted on a self-propelled chassis, and a second acquisition component is installed at the end of the second multi-axis robotic arm.

8. The comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments according to claim 1, characterized in that, The deep-earth microenvironment simulation and control system includes a monitoring unit, a data processing unit, and a double-layer truss structure control unit. The monitoring unit is used to monitor various environmental parameters of the cabin, plant cultivation rack and plant cultivation bed in real time. The monitoring unit includes a cabin monitoring module, a plant cultivation rack monitoring module and a plant cultivation bed monitoring module, which respectively monitor the temperature, humidity, carbon dioxide concentration and air pressure of the cabin, plant cultivation rack and plant cultivation bed in real time. The data processing unit is used to process the data collected by each sensor in the monitoring unit. First, the data processing unit filters the data collected by the sensor, then removes outliers to form valid data groups, and finally fuses and calculates to obtain control reference values. The double-layer truss structure control unit includes a control subunit and a first-layer truss structure and a second-layer truss structure that interact with the control subunit. The control subunit enables the raising and lowering of the first-layer truss structure and the second-layer truss structure.

9. The comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments according to claim 8, characterized in that, The first-layer truss structure includes a first mounting bracket and a rhythm / plant dual-spectrum integrated light fixture. The first mounting bracket is grid-shaped and installed on the top of the cabin. The rhythm / plant dual-spectrum integrated light fixture is mounted on the first mounting bracket. The second-layer truss structure includes a control component and a second mounting bracket that interacts with the control component, an automatic rain curtain component, and a rainfall simulation component; the second mounting bracket is "U"-shaped and is located below the first mounting bracket and connected to the first mounting bracket; The automatic rain curtain assembly includes a first rain curtain and a second rain curtain, which are mounted on a second support. The rainfall simulation assembly is retractably laid on the second mounting support for spraying water onto the cultivation bed to simulate rainfall.

10. A construction method for a comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments, comprising the comprehensive experimental chamber for screening and cultivating plants adapted to deep-earth environments as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Surrounding rock pretreatment: Drill holes in the surrounding rock according to the designed depth and spacing, pre-embed heat exchange pipes, fill with heat-conducting materials, and seal the borehole openings with polyurethane and apply waterproof coating. Step 2: Layered construction of the cabin: The waterproof concrete base layer is constructed in sequence, followed by the drainage layer, the radon-proof heat insulation layer, the elastic buffer layer, and finally the steel plate bearing layer is installed and fixed to the surrounding rock with connectors. Step 3: Installation of the bottom pressure-bearing interlayer and cold storage unit: Build a pressure-bearing interlayer at the bottom of the cabin, install a grid plate, place the pre-connected phase change cold storage encapsulation unit into the grid, and connect it to the evaporator pipeline of the active refrigeration unit. Step 4: Refrigeration system installation: Install the variable frequency water-cooled chiller unit, fan coil unit, air supply jacket and related piping; connect the water collector and distributor to the surrounding rock heat exchange piping; complete the piping and valve connection between the phase change cold storage unit and the chiller unit; Step 5: Waste heat recovery system installation: Connect the heat exchanger of the heat recovery unit in parallel with the variable frequency water-cooled chiller unit, and lay ionic liquid circulation pipelines to the phase change heat storage device and the heat-using terminals such as the underground heating coil, the warm air blower, and the irrigation water heat exchanger in the cabin. Step 6: Installation of the unmanned inspection system: Select the unmanned inspection system in plant cultivation rack mode or plant cultivation bed mode according to the experimental requirements; Step 7: Installation of the microenvironment control system: Install various environmental sensors; for the cultivation bed mode, additionally install a liftable double-layer truss structure, dual-spectrum lighting, automatic rain curtains, and a simulated rainfall system; Step 8: Overall linkage commissioning: Conduct joint commissioning of each subsystem, test the airtightness of the cabin, pressure bearing capacity, temperature and humidity control accuracy, inspection path accuracy and waste heat recovery efficiency, and put it into operation after passing the test.

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