Novel intelligent ventilation cooling system based on air-water-phase change-soil heat exchange

Abstract

The invention discloses a novel intelligent ventilation cooling system based on air-water-phase change-soil heat exchange, which improves the ventilation efficiency and cooling performance of a building, reduces energy consumption and adapts to multiple weather conditions. The system comprises a water storage unit (a U-shaped air circulation pipe is arranged below a building foundation), a water supply unit (underground water supplementing, filtering and recycling), a water drainage unit (efficient water drainage and water accumulation prevention), a phase change energy storage unit (staged heat storage and release for temperature rise slowing down), an air circulation pipeline unit (flexible air supply arrangement) and an intelligent control unit (dynamic monitoring and optimization of the internet of things). According to the system, a building raft foundation and a heat exchange device are innovatively combined, natural heat exchange characteristics of underground water, air and soil are utilized, phase change energy storage and intelligent control are integrated, the problems of heat exchange efficiency and burial depth selection of a traditional shallow geothermal ventilation system are solved, an efficient and sustainable building ventilation cooling scheme is provided, and the system has a wide application prospect. Wide application prospects are realized in the field of green buildings.

Description

Technical Field

[0001] The present invention belongs to the field of building environment and equipment engineering technology, and specifically relates to a new type of ventilation and cooling system, in particular, an intelligent ventilation and cooling system based on air-water-phase change-soil multi-media coupled heat exchange. The system achieves efficient energy-saving ventilation of buildings and maintenance of indoor thermal comfort environment by integrating multiple natural heat exchange media and intelligent control technology. Background Art

[0002] With global warming and increasing energy consumption, building energy conservation and low-carbon design have become important research directions in the field of sustainable development. Although traditional air conditioning and mechanical ventilation systems can provide good indoor air quality and thermal comfort, their high energy consumption and negative impact on the environment have become problems that cannot be ignored. Therefore, the development of a green ventilation and cooling technology that can significantly reduce energy consumption and improve heat exchange efficiency has become a hot topic in current research.

[0003] The shallow geothermal ventilation system is an energy-saving system that uses the stable temperature characteristics of the shallow underground soil to achieve heat exchange between air and soil through underground pipes. Its working principle is to use the characteristics of the shallow underground soil that is warm in winter and cool in summer. In summer, the outdoor hot air is cooled through the underground pipes and sent indoors to achieve the purpose of ventilation and cooling; in winter, the outdoor cold air is heated through the underground pipes and sent indoors to achieve the purpose of ventilation and heating. The geothermal system reduces the electrical energy consumption of traditional air-conditioning systems by utilizing existing geothermal energy.

[0004] However, the traditional shallow geothermal ventilation system still has some limitations. Shallow geothermal ventilation systems usually require a lot of underground excavation and pipeline laying, with a long construction period and limited applicability. In addition, due to the shallow burial depth, shallow geothermal ventilation systems are easily affected by the surface air temperature, and their heat exchange efficiency will be significantly reduced under extreme environmental conditions. The lack of intelligent control mechanism makes it difficult to dynamically optimize operating parameters according to actual usage needs, resulting in a difficult balance between energy consumption and performance. Therefore, it is very necessary to further improve the shallow geothermal ventilation system to more effectively utilize geothermal energy.

[0005] At present, some researchers have proposed invention patents related to shallow geothermal ventilation systems, such as: "Geothermal ventilation and ground source heat pump coupling system (publication number: CN112696748A)", "A geothermal ventilation system coupled to an underground building structure and its coupling method (publication number: CN112728672A)", "A liftable geothermal exchange system (publication number: CN208519922U)", "A wind direction changing device for a multi-point air intake and geothermal energy ventilation system (publication number: CN208566994U)". The above inventions have made certain progress in the optimization of heat exchange structures and coupling design, but there are still many shortcomings in terms of construction convenience, system intelligence, extreme climate adaptability and heat exchange efficiency improvement.

[0006] In view of the problems of construction complexity, insufficient intelligence and poor adaptability to extreme environments of traditional shallow geothermal ventilation systems, the present invention proposes a new ventilation and cooling system based on air-water-phase change-soil multi-media coupled heat exchange. Its main innovations are as follows: 1) By integrating air, soil, water storage and phase change energy storage materials, multi-path heat transfer is achieved, greatly improving the heat exchange efficiency; 2) Modular water storage tanks and pipeline structures are adopted, without large-scale excavation, convenient construction and significantly reduced costs; 3) Combined with embedded sensor networks and artificial intelligence algorithms, real-time monitoring and optimization of system operation to ensure high efficiency and energy saving; 4) The heat storage characteristics of phase change materials are used to overcome the efficiency attenuation problem of shallow systems under extreme climatic conditions; 5) Photovoltaic power generation modules are used to provide the main power for the system to achieve the goal of carbon neutrality. The present invention achieves a good balance between construction difficulty and heat exchange efficiency, providing an efficient and sustainable solution for future green building design, and has broad application prospects. Summary of the invention

[0007] The purpose of this invention is to solve the technical problems existing in the existing shallow geothermal ventilation system. By innovatively combining air, water, phase change materials and soil heat exchange, a new intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange is proposed. The system makes full use of the raft foundation of the building and integrates multi-media heat exchange technology, which not only improves the heat exchange efficiency, but also greatly reduces the construction cost and complexity, thus providing an efficient and sustainable solution for the low-energy operation of the building.

[0008] To achieve the above object, the present invention adopts the following technical solution:

[0009] A new intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange, characterized in that the system integrates a water storage unit, a water supply unit, a drainage unit, a phase change energy storage unit, an air circulation pipeline unit and an intelligent control unit. Through multi-media efficient heat exchange and dynamic optimization control, intelligent ventilation and cooling of building space are realized, and energy use and environmental comfort are optimized.

[0010] The water storage unit is arranged under the foundation of the building, and the raft foundation of the building is used as a water storage tank. Several U-shaped air circulation pipes made of high thermal conductivity composite materials are arranged in the tank to enhance the heat exchange efficiency. The wall of the water storage tank is made of high-strength waterproof concrete, and the bottom and wall of the tank are covered with nano-impermeable coating to improve durability and water tightness. The water storage tank is equipped with water level and temperature sensors to monitor the water level and water temperature in real time, and automatically adjust the circulating water volume to ensure the stability of the system operation. The water storage unit design can be designed through modular splicing, and the volume of the water storage tank can be flexibly adjusted according to the building load requirements. At the same time, the selection of internal and external materials in the tank further improves the reliability and durability of the system.

[0011] The water supply unit is located on the other side of the building and consists of an irrigation well, a water supply pipe and a two-way water pump. The system is powered by photovoltaic power generation and municipal electricity to ensure stable operation under different climatic conditions. The water pump has a two-way flow regulation function, and the automatic switching between groundwater recharge and circulating water is achieved through an intelligent control unit. The water flow direction reversal function is used to remove sediments in the water supply pipe.

[0012] The drainage unit is located on the other side of the building. It adopts a tapered irrigation channel design and is equipped with a self-cleaning filter device and a dynamic drainage control valve to ensure water cleanliness and drainage efficiency.

[0013] The phase change energy storage unit is placed in the water pool around the air circulation pipe unit, and is placed around the water pool and on the outer wall of the air circulation pipe using a packaging technology that combines dual melting point multi-stage phase change materials with a high thermal conductivity substrate. The heat exchange interface between the phase change energy storage unit and the outer wall of the air circulation pipe is optimized to maintain efficient energy transfer when the temperature changes rapidly. The unit can stabilize the heat exchange performance of the system by absorbing or releasing heat, delay water temperature changes, and improve system stability and efficiency.

[0014] The air circulation duct unit is arranged inside the building and the water storage unit. The air inlet is located on the outer wall of the first floor of the building and is equipped with a replaceable air filter module; the air outlet is flexibly arranged on different floors of the building to support independent air supply in multiple areas. The inner wall of the duct is coated with a hydrophilic antibacterial nano-composite coating to reduce the risk of condensate generation and bacterial growth. The air circulation pipe is installed at increasing angles along the bottom of the water storage tank, and the lowest point is connected to the condensate collection pump. The condensate can be used for system circulation or other purposes; the system adopts a special condensate collection system to ensure that the condensate is effectively discharged and recycled, thereby improving heat exchange efficiency, extending system life, and ensuring indoor air quality.

[0015] The intelligent control unit integrates an embedded sensor network to monitor the water storage temperature, air humidity, heat exchange rate and energy consumption in real time, and uses an adaptive control algorithm to dynamically optimize the heat exchange parameters and air volume distribution to minimize energy consumption and efficiently adjust the indoor environment. At the same time, the system is equipped with an AI learning algorithm to predict the system energy consumption based on historical data and dynamically optimize the operation mode to further enhance the intelligence and adaptability of the system. The intelligent control unit supports remote monitoring and fault diagnosis functions, and can view the operating status in real time and send maintenance reminders through mobile terminals.

[0016] The beneficial effects of the present invention are:

[0017] 1. Shallow geothermal ventilation systems usually require a lot of underground excavation and pipe laying, which is complex and costly to construct. The present invention innovatively uses the raft foundation of the building as the water storage unit of the system, avoiding cumbersome underground engineering and significantly reducing the construction difficulty and cost. In addition, the existing infrastructure is used to avoid duplication of construction, further saving resources and labor;

[0018] 2. The present invention innovatively utilizes the heat exchange between groundwater and air, combined with the heat exchange mechanism of groundwater infiltration and deep soil, to ensure that the system can still achieve efficient heat exchange under shallow burial depth conditions. This design not only solves the problems of difficult construction and low heat exchange efficiency of traditional shallow geothermal ventilation systems, but also greatly improves the operating stability and overall efficiency of the system. Through the comprehensive heat exchange of water, soil, air and phase change, the system can maintain a stable temperature control effect in different seasons, effectively reducing energy consumption;

[0019] 3. The drainage outlet of the system is connected to the irrigation canal to ensure full utilization of groundwater resources. During the irrigation process, groundwater exchanges heat with deep soil through infiltration to restore water temperature, thereby realizing the recycling of groundwater. This design not only improves the utilization rate of water resources, but also avoids water waste. At the same time, through the combination with the irrigation system, it can provide a stable water source for greening and agriculture, with significant ecological and social benefits;

[0020] 4. The cooling and ventilation system is equipped with a condensate treatment system, which realizes the efficient discharge of condensate generated during the operation of the system and avoids the accumulation of condensate in the pipes. This not only improves the heat exchange efficiency, but also effectively reduces the long-term accumulation of moisture in the pipes, reduces the corrosion risk of pipe materials, and extends the service life of the system. At the same time, the condensate treatment system can also reduce the growth of mold and bacteria, improve the air quality of the system supply, and thus ensure the health and comfort of the indoor environment;

[0021] 5. The water tank is equipped with a water level sensor and a temperature sensor to monitor the water level and temperature in real time. The intelligent control system automatically adjusts the water replenishment and circulating water volume according to the sensor feedback to ensure that the system is always in the best operating state. This intelligent control system not only improves the operating efficiency of the system, but also simplifies the maintenance process, reduces manual intervention, and enhances the reliability and operability of the system;

[0022] 6. This system introduces a phase change module, which delays the change of water temperature by absorbing or releasing heat, further improving the stability and efficiency of the heat exchange process. Phase change materials can store excess heat or cold in the system, prolong the duration of cooling or heating effects, thereby reducing the frequent water replenishment and drainage operations of the system, further improving the efficiency and stability of the overall system.

[0023] These innovative designs give the present invention significant advantages in terms of improving heat exchange efficiency, reducing construction costs, extending system service life, and improving energy utilization, and have broad application prospects and ecological benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the overall structure of a new intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange in one embodiment of the present invention;

[0026] Figure 2 A schematic diagram of a ventilation duct of a novel intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange in one embodiment of the present invention;

[0027] Label instructions: 1. Water storage tank, 2. U-shaped air circulation pipe, 3. Irrigation well, 4. Water supply pipe, 5. Bidirectional water pump, 6. Tapered irrigation channel, 7. Drainage pipe, 8. Dynamic drainage control valve, 9. Air filtration module, 10. Nano-level anti-seepage coating, 11. Water level sensor, 12. Temperature sensor, 13. High-efficiency monocrystalline silicon photovoltaic panel, 14. Condensate collection pump, 15. High thermal conductivity substrate, 16. Internet of Things module, 17. Underground seepage, 18. Groundwater. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to various embodiments shown in the accompanying drawings.

[0029] See also Figure 1-2 As shown, a new intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange integrates a water storage unit, a water supply unit, a drainage unit, a phase change energy storage unit, an air circulation pipeline unit and an intelligent control unit. Through multi-media efficient heat exchange and dynamic optimization control, intelligent ventilation and cooling of building space are realized. The water storage unit is arranged under the building and is composed of high-strength anti-leakage composite materials to form a modular structure with adjustable volume of the water storage tank 1. The water storage tank 1 is equipped with a number of U-shaped air circulation pipes 2 made of high thermal conductivity composite materials. The pipe diameter can generally be set to 100-150mm. The U-shaped pipe structure can ensure that the air has a more uniform flow rate in the pipe, the heat exchange effect is more uniform, and the construction and maintenance are more convenient. The water supply unit is located on one side of the building, including an irrigation well 3, a replenishment water pipe 4 and a two-way water pump. The irrigation well 3 can be an ordinary water well, which can meet the water needs of the building and the system at the same time. The groundwater is transported to the water storage unit through the two-way water pump 5 to supplement the water source. The replenishment unit is powered by photovoltaic power generation and municipal power to ensure stable operation of the system under different climatic conditions. The drainage unit is located on the other side of the building, and is provided with a tapered irrigation channel 6 and a drainage pipe 7 to ensure that the water in the water storage unit can be discharged efficiently. The drainage unit adopts a tapered irrigation channel design, equipped with a self-cleaning filter device and a dynamic drainage control valve 8 to ensure the water quality and drainage efficiency in the water storage unit. The tapered irrigation channel 6 should be designed to be wide and deep enough to effectively guide the water flow in the cooling system to the drainage pipe 7. The feed water pipe 4 and the drainage pipe 7 are made of corrosion-resistant materials, such as PVC or HDPE pipes, to ensure long-term stable water supply and drainage effects. The phase change energy storage unit is placed around the water storage tank and on the outer walls of the two U-shaped air circulation pipes to maintain stable heat exchange performance by absorbing or releasing heat. The phase change material uses a double melting point multi-stage phase change material. The U-shaped air circulation pipe 2 is arranged in the water storage tank 1 and inside the building. Its air inlet is arranged on the outer wall of the first floor of the building and is equipped with a replaceable air filter module 9. The air outlet is flexibly arranged on different floors according to the thermal comfort requirements. The system supports independent air supply in multiple areas. The layout of the U-shaped air circulation pipe 2 needs to be considered in the design to ensure that the design of the pipe length and the bends conforms to the optimal fluid mechanics principle, thereby maximizing heat exchange efficiency and reducing energy consumption. The intelligent control unit monitors the water storage temperature, air humidity, heat exchange rate and energy consumption in real time through an embedded sensor network, and uses an adaptive control algorithm to dynamically optimize heat exchange parameters and air volume distribution to achieve energy minimization and efficient regulation of the indoor environment.

[0030] As a preferred embodiment, the water storage unit adopts a modular splicing design, and the volume of the water storage tank can be flexibly adjusted according to the load requirements of the building foundation, and the inlet and outlet pipes are equipped with filters to prevent impurities from entering the system; the bottom and wall of the water storage tank 1 are covered with a nano-level anti-seepage coating 10 to enhance the durability and water tightness of the structure, while meeting the foundation bearing capacity and anti-buoyancy requirements; the inlet and outlet pipes on both sides of the water storage tank 1 are equipped with high-precision filtering devices and backwashing functions to extend the service life of the equipment. A water level sensor 11 and a temperature sensor 12 are provided inside the water storage tank 1 for real-time monitoring of the water level and water temperature, and automatically adjusting the water replenishment and circulating water volume through the control system. The depth of the water storage tank 1 is not less than 0.5m according to the requirements of the raft foundation, and the general depth is 1.2-1.5m, but the specific depth depends on the building structure and refrigeration capacity; and the distance from the groundwater level to the bottom of the water storage tank is not less than 0.5m.

[0031] Preferably, the photovoltaic power generation module of the water supply unit adopts a high-efficiency monocrystalline silicon photovoltaic panel 13, equipped with an energy storage battery and an energy management system, giving priority to the use of renewable energy for power supply, and the energy storage battery can ensure normal power supply under special circumstances. The water supply unit is provided with a water well on the ground, and the two-way water pump 5 is connected to two water pipes, one connected to the water storage unit for water supply, and the other connected to the outside of the water well for normal water supply. The water pump has a two-way flow regulation function, and realizes automatic switching between groundwater replenishment and circulating water through an intelligent control unit. At the same time, it has a water flow direction reversal function for clearing sediments in the water supply pipeline. In the design, the layout of the water supply unit on the ground is taken into consideration, and sufficient sunlight for the high-efficiency monocrystalline silicon photovoltaic panel 13, easy maintenance and management of the two-way water pump 5 and the water pipe should be ensured, and the ground facilities should be ensured not to affect the normal operation of the system and the safety of the surrounding environment.

[0032] As a preferred embodiment, the air inlet of the U-shaped air circulation pipe 2 is arranged on an outer wall of a layer, and an air filter module 9 is provided at the same time. The outer frame of the air filter module 9 can be a durable and easy-to-clean stainless steel outer frame. The filter material is a polyester synthetic fiber filter material, which can effectively filter the tiny particles in the air and ensure the air quality of the input building. The filter thickness is 25mm, which can provide sufficient filtering surface area and long service life. The air filter module 9 can also prevent some debris from entering the system and causing blockage, ensuring the normal operation of the system. The air outlet of the U-shaped air circulation pipe 2 is arranged at the top of the required layer, and the diameter of the air inlet and the air outlet is designed according to the wind speed optimization, combined with the CFD (computational fluid dynamics) simulation results to dynamically adjust to ensure that the wind speed in different areas is evenly distributed, which ensures that the system can effectively transport the cooled air to the interior of the building to meet the air conditioning needs. In order to protect the pipeline and system equipment from damage, and to ensure the operating efficiency and safety of the system, the part of the U-shaped air circulation pipe 2 connected to the water tank 1 needs to be strictly waterproofed and sealed to prevent water from leaking into the pipeline. The inner wall of the U-shaped air circulation pipe 2 is coated with a nano-scale anti-seepage coating 10 with hydrophilic and antibacterial properties. The coating can enhance the diffusivity of condensed water, prompting water droplets to quickly converge and flow down, thereby reducing the retention of condensed water on the pipe wall and reducing the risk of obstructing airflow. At the same time, it can effectively inhibit the growth of bacteria, mold and algae on the inner wall of the pipe, maintain the cleanliness of the pipe, improve air quality and extend the service life of the pipe. The U-shaped air circulation pipe 2 is installed along the bottom of the water storage tank at an increasing angle. The increasing angle can be set to 2°-5° according to actual needs, ensuring the natural flow of condensed water while avoiding excessive slopes that cause airflow turbulence. Its lowest point is connected to the drainage pipe 7 through an efficient condensed water collection pump 14. The condensed water collection pump 14 is equipped with a liquid level sensor to monitor the accumulation of condensed water in real time, and automatically start and stop to avoid excessive operation of the pump. .

[0033] Preferably, the phase change energy storage unit uses nano-microcapsule technology to encapsulate the phase change material, combined with a high thermal conductivity substrate 15 to enhance the heat exchange performance, and the phase change temperature can be customized according to seasonal requirements. The high thermal conductivity substrate 15 can be made of graphene-based materials or high thermal conductivity aluminum alloys to further enhance the heat exchange performance. The surface can be designed as a micro-groove or porous structure to increase the heat exchange area and optimize the heat energy transfer during the phase change process. The ultra-high specific surface area of ​​the nano-microcapsules can significantly improve the heat transfer efficiency of the phase change material, especially for conditions with rapid temperature changes; the heat exchange interface between the phase change energy storage unit and the outer wall of the U-shaped air circulation pipe 2 is optimized and can maintain efficient energy transfer under conditions of rapid temperature changes. The heat exchange interface can use surface coating technology (such as metal oxide coating) to reduce thermal resistance. At the same time, a flow channel or fin structure can be introduced in the interface design to effectively improve the energy exchange efficiency between the air circulation pipe and the phase change energy storage unit.

[0034] Preferably, the intelligent control unit is equipped with an AI-based deep learning algorithm, which predicts future energy consumption trends by collecting historical operating data of the system (including temperature, humidity, energy consumption, environmental parameters, etc.). The system can predict the system energy consumption based on historical operating data and dynamically adjust the operating mode, such as optimizing energy consumption distribution during peak periods and performing deep maintenance and cleaning during low-load periods. The system is equipped with an Internet of Things (IoT) module 16, which can collect and analyze the operating data of the system in real time and synchronize with the mobile terminal through a cloud platform. Users can view key parameters such as temperature, flow, and operating status through a mobile phone APP or a computer terminal to achieve real-time monitoring and management. The system has a built-in fault detection algorithm that can quickly identify abnormal operating conditions (such as pipe blockage, pump damage or leakage) and send alarm reminders to users in a timely manner. Based on data analysis, the intelligent control unit can predict equipment aging or consumable replacement time in advance, and provide users with maintenance plan recommendations.

[0035] Specifically, the working process of the ventilation system is as follows: In summer (winter), outdoor hot (cold) air enters the system from the air inlet on the outer wall of the building, and after being filtered by the air filter module 9, enters the U-shaped air circulation pipe 2. The hot (cold) air flows in the water storage unit through the U-shaped pipe, and the water storage unit is set under the building. The cold water (warm water) in the water storage tank 1 can absorb (transfer) heat in the air, so that the air temperature continues to flow after decreasing (increasing). The phase change unit close to the U-shaped air circulation pipe 2 plays a regulating role. When the water temperature fluctuates due to heat absorption or release, the phase change material will absorb or release a large amount of heat, buffer the change of water temperature, and maintain the stability of the water temperature in the water storage tank 1, thereby further improving the heat exchange effect and efficiency of the system. The cooled (heated) air flows out of the U-shaped air circulation pipe 2, enters the interior of the building through the air outlet set at the top of the required layer, and provides cool (warm) air for the room. The drainage unit discharges excess water from the water storage unit through the tapered irrigation channel 6 and the drainage pipe 7. At the same time, a temperature sensor 12 is provided in the drainage unit. When the water temperature cannot meet the cooling (heating) requirements, the drainage pipe will automatically start to discharge the water in the water storage tank 1. At the same time, the two-way water pump 5 in the well starts to work to replenish new groundwater into the water storage tank 1 until the water temperature in the water storage tank 1 meets the requirements. The system automatically stops the drainage and water replenishment operations to ensure the cooling (heating) effect of the system. The water supply unit is located on one side of the building. A two-way water pump 5 is provided inside the irrigation well 3. The groundwater is pumped from the irrigation well 3 to the water storage unit by the two-way water pump 5.

[0036] The new cooling and ventilation system of this structure has the advantages of efficient heat exchange, energy saving and environmental protection, simple construction and versatility. While reducing the difficulty of construction, it can achieve cooling in summer and heating in winter by utilizing the temperature regulation function of groundwater, thereby improving the efficiency of traditional shallow geothermal ventilation systems, reducing dependence on traditional air conditioning and heating systems, and achieving the goal of energy saving and environmental protection.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A new intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange, characterized by: The system integrates water storage units, water supply units, drainage units, phase change energy storage units, air circulation pipe units and intelligent control units, and realizes intelligent ventilation and cooling of building spaces through multi-media efficient heat exchange and dynamic optimization control. The water storage unit is located under the raft foundation of the building, forming a modular structure with adjustable water storage tank volume. Several U-shaped air circulation pipes are evenly arranged in the water storage tank to enhance the heat exchange efficiency. The water supply unit is located on one side of the building, including an irrigation well, a water supply pipe and a two-way water pump. It is powered by photovoltaic power generation and municipal electricity to ensure the stable operation of the system under different climatic conditions. The drainage unit is located on the other side of the building, adopts a tapered irrigation channel design, and is equipped with a self-cleaning filter device and a dynamic drainage control valve to ensure the water quality and drainage efficiency in the water storage unit. The phase change energy storage unit is placed around the water storage tank and on the outer wall of the air circulation pipe to maintain stable heat exchange performance by absorbing or releasing heat. The air circulation pipe unit is arranged in the water storage tank and inside the building, and its air inlet is located on the outer wall of the first floor of the building and is equipped with a replaceable air filter module. The air outlet is flexibly arranged on different floors according to thermal comfort requirements. The intelligent control unit monitors the water storage temperature, air humidity, heat exchange rate and energy consumption in real time through an embedded sensor network, and dynamically optimizes the heat exchange parameters and air volume distribution using an adaptive control algorithm to achieve energy consumption minimization and efficient regulation of the indoor environment.

2. A novel intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange according to claim 1, characterized in that: The water storage unit adopts a modular splicing design, and the volume of the water tank can be flexibly adjusted according to the load requirements of the building foundation; the bottom and walls of the water tank are covered with a nano-level anti-seepage coating to enhance the durability and water tightness of the structure while meeting the foundation bearing capacity and anti-buoyancy requirements; the inlet and outlet pipes on both sides of the water tank are equipped with high-precision filtering devices and backwashing functions to extend the service life of the equipment.

3. A novel intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange according to claim 1, characterized in that: The photovoltaic power generation module of the water supply unit adopts a high-efficiency monocrystalline silicon photovoltaic panel, is equipped with energy storage batteries and an energy management system, and gives priority to the use of renewable energy for power supply; the water pump has a two-way flow regulation function, and realizes automatic switching between groundwater recharge and circulating water through an intelligent control unit. It also has a water flow direction reversal function to remove sediment in the water supply pipeline.

4. A novel intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange according to claim 1, characterized in that: The inner wall of the air circulation pipe is coated with a nano-composite coating with hydrophilic and antibacterial properties to reduce the risk of condensation water generation and bacterial growth; the U-shaped air circulation pipe is installed at an increasing angle along the bottom of the water storage tank, and its lowest point is connected to the drain pipe through an efficient condensation water collection pump. The condensation water can be used for internal circulation of the system or other purposes.

5. According to claim 1, a novel intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange is characterized in that: The phase change energy storage unit uses nano-microcapsule technology to encapsulate phase change materials, combined with a high thermal conductivity substrate to enhance heat exchange performance, and the phase change temperature can be customized according to seasonal requirements; the heat exchange interface between the phase change energy storage unit and the outer wall of the air circulation pipe is optimized and can maintain efficient energy transfer under conditions of rapid temperature changes.

6. According to the novel intelligent ventilation and cooling system based on air-water-phase change-soil heat exchange described in claim 1, the intelligent control unit is equipped with an AI-based learning algorithm, which can predict the system energy consumption according to historical operation data and dynamically adjust the operation mode; the system has remote monitoring and fault diagnosis functions, and can view the operation status in real time and send maintenance reminders through a mobile terminal.

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