Intelligent temperature control fresh air system based on solar vacuum tube and humidifying integrated device thereof

Abstract

The application belongs to the technical field of heat exchange and intelligent control, and discloses a new intelligent temperature control fresh air system based on a solar vacuum tube and a humidifying integrated device thereof, which comprises a solar heat collecting module, an air filtering module, a supply air pipeline, a temperature control module and an intelligent control module; the solar heat collecting module is used for heating fresh air and adopts a vacuum tube heat collector; the air filtering module comprises a primary efficiency filter screen and a high efficiency filter screen and ensures that the air sent into a room is clean; and the supply air pipeline, the temperature control module and the intelligent control module are used for controlling the temperature of the air supplied into the room. The application uses double temperature sensors to cooperatively monitor and an intelligent control algorithm to improve the precision of the temperature of the air supplied into the room to within ±1℃; a solar self-adaptive control strategy improves the energy utilization rate by more than 40%; a modular design integrates humidifying and multiple filtering functions to meet individual needs; a climate self-adaptive algorithm enables the same system to intelligently adapt to different climate conditions in the north and the south and reduces the cross-regional use cost by 60%. The system is more stable in operation, has an average failure-free time of 8000 hours, a noise lower than 35 decibels and supports APP remote control.

Description

Technical Field

[0001] This invention belongs to the field of heat exchange and intelligent control technology, and particularly relates to an intelligent temperature-controlled fresh air system based on solar vacuum tubes and its humidification integrated device. Background Technology

[0002] Existing fresh air systems have significant shortcomings in improving indoor air quality: in northern regions, the direct introduction of cold air in winter leads to severe heat loss, while in southern regions, they fail to meet heating needs. Although some systems employ solar-assisted heating or heat recovery technologies, they still suffer from poor control precision and low energy utilization. The closest existing technology is the solar-assisted heating fresh air system, which uses solar collectors to preheat the air, but relies solely on a single temperature sensor for control, resulting in large fluctuations in supply air temperature; it operates in a fixed airflow mode and cannot automatically adjust according to solar heat gain, leading to significant energy waste; furthermore, it has limited functionality and lacks air quality optimization design. These systems generally suffer from technical bottlenecks such as simple control strategies, insufficient heat utilization, poor functional scalability, and weak regional adaptability, failing to simultaneously meet the diverse needs of different climatic regions. Therefore, there is an urgent need to develop a fresh air system with intelligent temperature control, high energy efficiency, and multi-functional integration. By optimizing control strategies and improving energy utilization, it can achieve precise regulation of supply air temperature, meet users' diverse air quality needs, and solve the adaptability problem of existing technologies in different regional environments.

[0003] Existing solar-powered fresh air systems suffer from four main technical shortcomings: First, insufficient temperature control accuracy, with single-point temperature monitoring leading to supply air temperature fluctuations of ±3-5℃, stemming from a lack of temperature difference feedback mechanisms and lag in control response. Second, low energy efficiency, with fixed airflow operation resulting in approximately 35% waste of solar energy, primarily due to the difficulty of traditional control algorithms adapting to the intermittent nature of solar energy. Third, insufficient functional integration, with features such as aromatherapy, expected by 87% of users, missing due to the lack of scalability in the system architecture. Finally, poor regional adaptability, with interchangeable models between northern and southern regions increasing costs by over 40%, stemming from a lack of consideration for climate adaptation requirements during design. The essence of these problems lies in: inadequate sensor networks leading to insufficient data acquisition, mismatch between control strategies and renewable energy characteristics, low system modularity, and a lack of intelligent climate adaptation algorithms. Solving these problems faces three major technical challenges: increased system complexity due to multi-parameter coupled control, difficulties in accurate modeling under nonlinear conditions, and the balance between multi-functional integration and system stability. These shortcomings severely restrict the performance improvement and market promotion of solar-powered fresh air systems.

[0004] Based on the above analysis, the problems and shortcomings of the existing technology are as follows: (1) Insufficient temperature control accuracy, with only single-point temperature monitoring resulting in air supply temperature fluctuations of ±3-5℃, which stems from the lack of temperature difference feedback mechanism and control response lag.

[0005] (2) The energy utilization efficiency is low. The fixed air volume operation mode causes about 35% of the heat collection energy to be wasted. The main reason is that the traditional control algorithm is difficult to adapt to the intermittent characteristics of solar energy.

[0006] (3) Insufficient functional integration; 87% of users expect functions such as aromatherapy, which are missing due to the lack of scalability in the system architecture.

[0007] (4) Poor regional adaptability; switching between models from the north and south would increase costs by more than 40%, which is due to the lack of consideration for climate adaptability in the design. Summary of the Invention

[0008] To address the problems existing in the prior art, this invention provides an intelligent temperature-controlled fresh air system based on a solar vacuum tube and its integrated humidification device.

[0009] This invention is implemented as follows: an intelligent temperature-controlled fresh air system based on a solar vacuum tube and its integrated humidification device include: Solar thermal collector module: Uses vacuum tube collectors to heat fresh air; Air filtration module: Includes a pre-filter and a high-efficiency filter, and filters and dries the air entering the instant heating module according to the usage environment, removing dust and other impurities from the air to ensure that the air delivered into the room is clean; Air supply ducts and temperature control module, intelligent control module. Furthermore, the air supply duct and temperature control module: Temperature sensor 1, temperature sensor 2, electric air valve, variable frequency induced draft fan. Furthermore, the temperature sensor 1 is installed at the solar collector end to monitor the temperature of the heated air (T1).

[0010] Furthermore, the temperature sensor 2 is installed at the end of the air supply duct to monitor the actual air supply temperature (T2). Furthermore, the electric air valve dynamically adjusts its opening based on the temperature difference between T1 and T2 to control the air supply volume. Furthermore, the variable frequency induced draft fan automatically adjusts its speed according to system requirements to optimize energy consumption. Furthermore, the intelligent control module: Receive temperature sensor data, execute PID+fuzzy control algorithm, and output control signals for damper opening and fan speed; Integrated climate model selection (north / south) and automatic adjustment of operating strategies; Humidification module: Located at the air outlet, it features a detachable design, allowing users to add humidifiers themselves.

[0011] Based on the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by this invention are as follows: First, this invention aims to provide an intelligent temperature-controlled solar-powered fresh air system, effectively solving key problems existing in current technologies through an innovative system architecture and control method. This system employs dual-temperature sensor collaborative monitoring technology to collect real-time temperature difference data between the solar collector and the air supply duct. Through an intelligent control algorithm, it dynamically adjusts the valve opening and fan speed to achieve precise control of the supply air temperature (within ±1℃). Simultaneously, it innovatively adopts a solar adaptive control strategy, automatically optimizing operating parameters based on irradiance intensity, thereby improving energy utilization by over 40%. The system adopts a modular design, integrating a replaceable humidifier box and multiple filtration devices, enabling functional expansion while ensuring system stability. Through a built-in climate adaptive algorithm, the same system can intelligently identify regional differences between north and south and automatically adjust its operating mode, significantly improving the product's versatility and market adaptability. This invention achieves a comprehensive improvement in temperature control accuracy, energy efficiency, functional expandability, and regional adaptability while maintaining a simple system structure.

[0012] The intelligent temperature-controlled solar-powered fresh air system provided by this invention has significant advantages over existing technologies: It employs dual temperature sensors for collaborative monitoring and intelligent control algorithms, improving the accuracy of the supply air temperature to within ±1℃; the solar-powered adaptive control strategy increases energy utilization by over 40%; the modular design integrates humidification and multiple filtration functions to meet personalized needs; and the climate-adaptive algorithm allows the same system to intelligently adapt to different climate conditions in the north and south, reducing cross-regional usage costs by 60%. The system operates more stably, with a mean time between failures (MTBF) of 8000 hours, noise levels below 35 decibels, and supports remote control via an app. These improvements stem from an innovative closed-loop control architecture, intelligent algorithms, and modular design, achieving comprehensive performance enhancements while maintaining a simple structure, demonstrating outstanding technological advancement and market application value.

[0013] Secondly, this invention primarily aims to realize the utilization of solar energy in extremely cold regions. In high-altitude and frigid areas like Hulunbuir, the direct use of solar energy as heat, aside from photovoltaic power generation, is currently limited by the freezing of water and other media, preventing its realization. Furthermore, for regions with long winter heating seasons, residents rely mainly on opening windows for ventilation, resulting in heat loss. In high-traffic areas during the day, such as stadiums, hospitals, and schools, ventilation during periods of ample sunlight, by introducing clean air heated by solar energy, can avoid heat loss from window ventilation and simultaneously replenish air humidity. Especially for primary and secondary school students and children, classroom ventilation in winter can create a more comfortable learning environment and prevent outbreaks of seasonal illnesses such as influenza.

[0014] Currently, significant technical bottlenecks remain in the utilization of solar thermal energy in high-altitude and cold regions, both domestically and internationally. In particular, systems directly utilizing solar energy as thermal energy struggle to operate stably under extreme cold conditions, primarily due to the problem of water freezing. Furthermore, existing fresh air systems often experience a decline in indoor comfort during winter operation due to heat loss, a problem particularly pronounced in high-altitude and cold regions. This invention, by employing solar vacuum tube technology combined with an intelligent temperature control system, successfully achieves efficient utilization of solar thermal energy under extreme cold conditions, filling a technological gap in this field. Simultaneously, this invention integrates a fresh air system with humidification, solving the technical challenge of traditional fresh air systems affecting indoor air quality due to dryness during winter operation.

[0015] In high-altitude and cold regions, the significant temperature difference between indoors and outdoors in winter easily leads to heat loss from traditional fresh air systems, especially under extremely cold conditions. Furthermore, dry indoor air in winter has always been a major problem affecting people's lives and health, particularly in densely populated places like schools and hospitals, where dry air can easily trigger respiratory illnesses and the spread of influenza. This invention, through innovative design, utilizes solar-powered vacuum tubes to heat the air, combined with intelligent temperature control technology, achieving efficient operation of the fresh air system under cold winter conditions. It avoids heat loss caused by opening windows for ventilation and effectively solves the problem of dry indoor air in winter by integrating humidification, providing residents of high-altitude and cold regions with a comfortable and healthy living environment. This technical challenge has long remained unresolved, and the successful development of this invention provides an innovative solution to this problem.

[0016] Traditional thinking holds that directly utilizing solar energy for air heating in high-altitude, cold regions has significant limitations, primarily because traditional media such as water easily freezes at low temperatures, causing the system to malfunction. Furthermore, existing fresh air systems typically require additional humidification equipment during winter operation, increasing system complexity and energy consumption. This invention overcomes the technical bias caused by freezing issues by employing solar vacuum tube technology, thus avoiding the use of traditional water media. Simultaneously, by integrating humidification functionality, this invention eliminates the need for complex additional humidification equipment, significantly reducing system energy consumption and complexity, and breaking through the limitations of traditional technologies in the design and operation of fresh air systems. This innovative design not only overcomes technical biases but also provides a completely new technological path for the efficient operation of fresh air systems in high-altitude, cold regions during winter. Attached Figure Description

[0017] Figure 1 This is a structural block diagram of an intelligent temperature-controlled fresh air system and its humidification integrated device based on a solar vacuum tube, provided in an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of air circulation in a solar vacuum tube provided in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] like Figure 1 As shown in the figure, the present invention provides an intelligent temperature-controlled fresh air system based on solar vacuum tubes and its humidification integrated device. Through dual temperature sensor feedback control, adaptive air volume adjustment, modular humidification integration and climate adaptive algorithm, it solves the shortcomings of existing solar fresh air systems in terms of temperature control accuracy, energy utilization efficiency, functional scalability and regional adaptability. 1. System Overall Structure like Figure 1 As shown, this system mainly includes the following core modules: (1) Solar thermal collector module: a vacuum tube collector is used to heat fresh air. (2) Air filtration module: including a pre-filter and a high-efficiency filter to ensure that the air delivered into the room is clean. (3) Air supply duct and temperature control module: Temperature sensor 1: Installed at the solar collector end to monitor the temperature of the heated air (T1). Temperature sensor 2: Installed at the end of the air supply duct to monitor the actual air supply temperature (T2). Electric air valve: The opening degree is dynamically adjusted according to the temperature difference between T1 and T2 to control the air supply volume. Variable frequency induced draft fan: Automatically adjusts speed according to system requirements to optimize energy consumption. (4) Intelligent control module: Receives temperature sensor data, executes PID+fuzzy control algorithm, and outputs control signals for air valve opening and fan speed. Integrated climate model selection (north / south) and automatic adjustment of operating strategies. (5) Humidification module: Located at the air outlet, it adopts a detachable design, and users can replace the humidification sheet themselves.

[0021] The solar vacuum tube collector modules (vacuum tube arrays) of this system are installed in well-lit locations on the exterior walls or roofs of buildings, and connected to the indoor fresh air system through high-insulation air ducts. Fresh air is first introduced through the outdoor air inlet 1, passes through the pre-filter and high-efficiency filter modules, and then enters the air supply duct. It then passes sequentially through the temperature sensor 2, the electric damper, and the variable frequency exhaust fan, finally being delivered into the indoor environment from the indoor air outlet. The humidification modules are respectively installed at the exhaust fan outlets, adjacent to the indoor air outlets, achieving functional integration without occupying additional space.

[0022] The outlet of the vacuum tube collector is connected to the beginning of the air supply duct via a detachable flange and a flexible connecting hose to ensure smooth airflow and easy maintenance. Temperature sensor 1 is installed in the middle of the duct to monitor the air temperature after heat collection in real time. The signal lines of sensor 1 and sensor 2 are all connected to the fan controller. The electric air valve is installed in the middle of the duct, and its actuator is connected to the controller via a control cable. The variable frequency induced draft fan, air valve, and sensor together form a closed loop to achieve linkage control.

[0023] Each functional module is assembled using standard guide rails and a base plate. Modules such as filter modules, humidification boxes, and humidification chambers can be quickly inserted or removed. The damper actuator is bolted to the duct housing, and a maintenance door is provided. The induced draft fan has vibration-damping feet at the bottom and is integrated with the bracket. The control unit is located on the side of the equipment, and the panel is connected to the base via a quick-release buckle, facilitating on-site debugging and firmware upgrades.

[0024] When there is sufficient sunlight, outdoor air is drawn into the vacuum tube collector through air inlet 1. An end cap is added to the open end of the vacuum tube to create a sealed environment. The air enters the vacuum tube through a duct leading to the bottom of the tube, absorbs heat inside, and its temperature rises. It then flows out of the vacuum tube through a duct located near the end cap. Temperature sensor 1 (T1) provides real-time feedback of this temperature, which is used by the intelligent control module to determine the heat collection effect. If T1 is lower than the set preheating threshold, the control module prioritizes opening the air valve to increase the airflow through the collector tube to quickly raise the preheating temperature. If T1 exceeds the set upper limit, the air valve is appropriately closed or the bypass vent 2 is activated to prevent overheating of the pipeline. In applications, several vacuum tubes can be connected in series through ducts to continuously heat the air, depending on the user's requirement for the highest temperature.

[0025] Temperature sensor 2 (T2) at the end of the air supply duct monitors the actual temperature of the air supplied to the room. The control module executes a PID + fuzzy control algorithm based on ΔT = T1 – T2 and the target temperature, outputting commands for the air valve opening and the variable frequency exhaust fan speed. The system can switch PID parameters according to northern / southern climate patterns to achieve multi-regional adaptation; the variable frequency exhaust fan automatically adjusts the air volume under high or low temperature conditions to maintain stable indoor temperature with optimal energy efficiency.

[0026] A removable humidifier box is installed at the air outlet of the exhaust fan, allowing users to easily replace the humidifier pads. The humidifier box also features a built-in microporous diffuser plate, which, driven by the fan airflow, ensures even distribution of fragrance. The humidification module integrates an ultrasonic atomizer, which connects to the bottom of the air supply duct. Water mist is injected into the airflow through the atomizing tube. A humidity sensor (optional) feeds back the indoor humidity to the control module. When the humidity falls below the set value, humidification automatically activates, ensuring dual control of temperature and humidity.

[0027] 2. Core Control Logic (1) Temperature difference monitoring: Real-time acquisition of T1 (collector end temperature) and T2 (air supply temperature). (2) Airflow adjustment: When T1 > T2: Increase the opening of the electric damper to increase the air volume, and at the same time reduce the fan speed to reduce energy consumption. When T1 ≤ T2: Reduce the opening of the air valve to prevent excessively cold air from entering, and at the same time increase the fan speed to maintain the ventilation efficiency. (3) Climate adaptation: Northern Mode: Prioritize ensuring that the supply air temperature is close to the room temperature (20±1℃) to reduce heat loss. Southern mode: Allows for higher supply air temperature (25±2℃) to assist indoor heating. 3. Implementation of Key Technologies (1) Dual-sensor closed-loop control: The air valve and fan are dynamically adjusted by the difference between T1 and T2 (ΔT) to ensure temperature stability. (2) Solar adaptive algorithm: Predicting heat collection efficiency based on irradiance intensity allows for advance adjustment of operating parameters, preventing energy waste. (3) Modular humidification design: The humidifier box is connected to the air duct via a snap-fit ​​structure, and its replacement does not affect the system's sealing performance. 4. Technical Effects (1) Temperature control accuracy: air supply temperature fluctuation ≤ ±1℃, which is better than the existing technology (±3-5℃). (2) Energy efficiency: Energy utilization rate is increased by more than 40%, reducing solar energy waste. (3) Functional expandability: The humidification module supports personalized customization without affecting the core functions. (4) Versatility: The same system can be adapted to different climates in the north and south, reducing production costs. Specific implementation of the present invention: (1) Basic system architecture: The core structure consists of a vacuum tube collector combined with a multi-filtration system, and an electric air valve and a variable frequency fan connected by an insulated air duct. (2) Control system implementation: Based on the STM32 main control chip, the system uses PID + fuzzy algorithm to achieve precise temperature control of ±1℃ through dual temperature sensor data. (3) Humidification module design: The magnetic replaceable humidification box (100×60×30mm) is integrated into the air outlet and supports personalized fragrance selection. (4) Typical installation scheme: the collector is installed facing south and the main unit is installed in a concealed manner in the ceiling. The actual energy saving is more than 40% (Beijing winter -5℃ environment).

[0028] This system uses a vacuum tube solar collector as the heat source. After multiple filtrations on the fresh air side, the air is delivered to the terminal air outlet through an insulated duct. A temperature sensor T1 is installed at the collector end, and a temperature sensor T2 is installed before the air outlet to characterize the heat collection capacity and air supply status in real time. An electric damper is arranged in the insulated duct for precise air distribution, and a variable frequency fan is responsible for providing the required air volume and pressure head. Together, they form the temperature-air volume execution link.

[0029] The STM32 microcontroller acquires temperature values ​​T1 and T2 at a fixed sampling period and calculates the temperature difference ΔT = T1 - T2. The controller employs a composite algorithm combining PID control and fuzzy logic: when T1 > T2, it prioritizes increasing the damper opening to improve heat exchange utilization, while simultaneously reducing the fan speed to decrease energy consumption; when T1 ≤ T2, it narrows the damper opening to prevent the entry of low-temperature gas, while simultaneously increasing the fan speed to maintain the necessary ventilation. This valve-motor coordinated control suppresses overshoot and hysteresis in the supply air temperature, stabilizing the supply air temperature within the set range (≤ ±1℃).

[0030] In the climate adaptive layer, the system provides two target curves for the north and south: the northern mode locks the supply air temperature in a closed loop within a range close to room temperature (20±1℃) to reduce heat loss; the southern mode allows for a higher supply air target (25±2℃) to assist heating. The parallel solar adaptive algorithm predicts short-term heat collection efficiency based on irradiance and its rate of change, and corrects the damper opening and fan preset speed in advance to avoid frequent adjustments and energy waste caused by cloud shadows / irradiance jumps.

[0031] The terminal humidification module is integrated into the air outlet section with a quick-replaceable modular structure, without compromising the duct seal. As the supply air passes through the module, it achieves gas-liquid contact and approximate isenthalpic humidification, enabling on-demand humidification without affecting the upstream temperature control closed loop. Through the coordinated operation of the heat source, sensor, execution, and adaptive algorithm, the system achieves minimal fluctuations in supply air temperature, significantly improved energy efficiency, and adaptability to different climates in the north and south, as well as customized functional expansions, all on the same hardware platform.

[0032] Example 1: Winter Application in Northern Beijing Residences Twelve solar vacuum tube collectors were installed on the south-facing roof of a detached villa in Beijing. Air inlet 1 connects to a 12-meter-long insulated duct. Outdoor air, after passing through primary and high-efficiency filters, sequentially passes through temperature sensor 1, an electric damper installed in the middle section, and a variable-frequency exhaust fan at the end, finally being delivered into the living room through the exhaust vent. A humidification box and ultrasonic atomizing humidifier are integrated into the exhaust fan outlet. Custom-made pine wood humidifying discs and distilled water are centrally managed via a control module.

[0033] The system controller, based on STM32, uses a PID + fuzzy algorithm in a northern region to collect data on temperature variations T1 and T2 in real time. When the outdoor temperature is -5℃ and the collector temperature T1 reaches 30℃, the system automatically adjusts the damper opening to 70% and reduces the induced draft fan speed to 800 rpm. When T1 is lower than T2, the damper closes to 30% and the fan speed increases to 1200 rpm to ensure ventilation. After a week of continuous testing, the supply air temperature stabilized at 21℃±0.8℃, the indoor relative humidity remained at 45%–50%, and the energy utilization rate was improved by 62% compared to a simple vacuum tube system.

[0034] Example 2: Application in Guangzhou Southern Office Buildings from Late Summer to Autumn Fifteen vacuum tube solar collectors were installed in a server room on the top floor of an office building in Guangzhou, connected to a 10-meter-long insulated air duct and a 10-meter-long return air duct. The system was switched to Southern Mode, allowing a higher supply air temperature setting of 27 ℃ ± 1.5 ℃; the humidification module has built-in jasmine humidifiers, which automatically start during periods of high temperature and low humidity to replenish the indoor humidity to 50%–55%.

[0035] The controller, incorporating a solar adaptive algorithm, predicts T1 peak changes based on real-time irradiance intensity. When a sudden drop in irradiance occurs on a cloudy day, it pre-closes the air damper to 40% and appropriately increases the fan speed to 1500 rpm to prevent excessively cold air from entering. Once sunny weather resumes, the air damper quickly opens to 80%, and the fan speed drops back to 900 rpm to save energy. Continuous monitoring over 30 days shows that the system's supply air temperature is maintained at 26 ℃ ± 1.2 ℃, with overall power consumption reduced by approximately 48% compared to conventional air conditioning units, and maintaining stable and comfortable operation during multiple cooling / heating transitions.

[0036] I. Evidence related to the technical effects obtained by the embodiments of the present invention.

[0037] 1. Theoretical Analysis (1) Energy efficiency improvement This invention utilizes solar vacuum tubes to heat air, avoiding the freezing problem of traditional water-based heating methods in cold regions. Solar vacuum tubes possess highly efficient heat transfer performance and extremely low heat loss characteristics, enabling them to efficiently convert solar radiation energy into heat energy. Combined with an intelligent temperature control system, precise control of the fresh air system can be achieved, preventing heat waste and significantly improving the system's energy efficiency.

[0038] Theoretical analysis shows that compared with traditional electric heating fresh air systems, the energy utilization rate of the present invention can be increased by 30%-50%. Especially during the winter when there is sufficient sunlight, the system can operate entirely on solar energy, further reducing energy consumption.

[0039] (2) Improvement of indoor environment In cold, high-altitude regions during winter, dry indoor air is a common problem. This invention, by integrating a humidification function, can effectively regulate indoor humidity, maintaining it within a comfortable range for humans (40%-60%). Simultaneously, the clean air introduced by the fresh air system can significantly improve indoor air quality and reduce the occurrence of seasonal illnesses such as influenza. Theoretical analysis shows that after the system is operational, the PM2.5 concentration in indoor air can be reduced by more than 80%, and humidity can be stabilized within a suitable range.

[0040] (3) System stability This invention employs an intelligent temperature control system that can monitor indoor temperature and humidity in real time and automatically adjust the fresh air volume and heating power according to outdoor environmental conditions. Theoretical analysis shows that the system can maintain stable operation even under extreme cold conditions (such as below -30℃), avoiding system failures caused by temperature fluctuations.

[0041] 2. Analogical Experimental Design To further verify the technical effects of the present invention, the following experiment was designed for comparative verification: (1) Energy efficiency test experiment Experimental objective: To verify the energy efficiency improvement effect of the present invention when operating in cold and high-altitude regions during winter.

[0042] Experimental Design: Experimental group: Intelligent temperature-controlled fresh air system based on solar vacuum tube and its humidification integrated device; Control group: Traditional electric heating fresh air system (without solar energy utilization).

[0043] Experimental conditions: Ambient temperature: -20℃ to -30℃; Indoor area: 50 square meters; Experimental period: 7 consecutive days of operation, 8 hours per day.

[0044] Test indicators: system energy consumption (electricity consumption); indoor temperature improvement efficiency; indoor humidity regulation capability.

[0045] Expected results: The experimental group's system energy consumption was reduced by more than 40% compared to the control group; the experimental group's indoor temperature improvement efficiency was increased by more than 20%; and the experimental group's indoor humidity could be stabilized at 40%-60%.

[0046] (2) Indoor environment improvement experiment Experimental objective: To verify the effect of this invention on improving indoor air quality and comfort.

[0047] Experimental design: Experimental group: Intelligent temperature-controlled fresh air system based on solar vacuum tube and its humidification integrated device; Control group: Traditional mechanical ventilation system (ventilation by opening windows only).

[0048] Experimental conditions: Ambient temperature: -20℃ to -10℃; Indoor area: 50 square meters; Experimental period: 7 consecutive days of operation, 8 hours per day.

[0049] Test indicators: indoor PM2.5 concentration; indoor humidity; human comfort (assessed through questionnaire survey).

[0050] Expected results: The indoor PM2.5 concentration in the experimental group was reduced by more than 80% compared with the control group; the indoor humidity in the experimental group was stabilized at 40%-60%; the indoor environmental comfort in the experimental group was significantly improved, and the satisfaction rate in the questionnaire survey reached more than 90%.

[0051] (3) System stability test experiment Experimental objective: To verify the system stability of the present invention under extreme cold conditions.

[0052] Experimental Design: Experimental Group: Intelligent Temperature Control Fresh Air System Based on Solar Vacuum Tube and its Humidification Integration Device; Control group: Traditional solar heating system (using water as the medium).

[0053] Experimental conditions: Ambient temperature: -30℃ to -40℃; Experimental period: 14 consecutive days of operation, 12 hours per day.

[0054] Test metrics: system uptime; system failure rate; thermal output stability.

[0055] Expected results: The experimental system operated stably without faults during the experimental period; the thermal output stability of the experimental group was better than that of the control group, with thermal output fluctuation range of less than 5%.

[0056] 3. Summary of Technical Effects Through theoretical analysis and analogical experimental design, the technical effects of this invention can be verified in the following aspects: (1) Significantly improve energy efficiency and reduce energy consumption; (2) Effectively improves indoor air quality and enhances comfort; (3) Maintain stable system operation under extreme cold conditions; (4) Reduce indoor dryness in winter and lower the risk of seasonal disease transmission.

[0057] These technologies not only solve the technical challenges of operating fresh air systems in cold regions during winter, but also provide residents with a more comfortable and healthy living environment, thus having significant social and economic value.

[0058] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A smart temperature-controlled fresh air system based on solar vacuum tubes, characterized in that, include: Vacuum tube heat collection module, used to heat the introduced fresh air; The filtration module includes a pre-filter and a high-efficiency filter; Air supply ducts; Temperature sensor 1 is used to monitor the air temperature at the outlet of the vacuum tube heat collection module; Temperature sensor 2 is used to monitor the air temperature at the outlet of the air supply duct; An electric air valve is installed in the middle of the air supply duct; A variable frequency induced draft fan is installed at the end of the air supply duct; The control module is electrically connected to temperature sensor 1, temperature sensor 2, electric air valve and variable frequency induced draft fan respectively, so as to dynamically adjust the opening degree of electric air valve and the speed of variable frequency induced draft fan according to the temperature difference between temperature sensor 1 and temperature sensor 2. The humidification module is located at the air outlet of the variable frequency induced draft fan.

2. A control method for the system according to claim 1, characterized in that, Includes the following steps: The temperatures of temperature sensor 1 and temperature sensor 2 are collected in real time, and the temperature difference is obtained. When the temperature monitored by temperature sensor 1 is higher than the temperature monitored by temperature sensor 2, the opening of the electric damper is increased and the speed of the variable frequency induced draft fan is reduced. When the temperature monitored by temperature sensor 1 is lower than the temperature monitored by temperature sensor 2 or the two temperatures are equal, the opening of the electric air valve is reduced and the speed of the variable frequency induced draft fan is increased. Adjust the target supply air temperature according to the preset northern and southern modes respectively.

3. A detachable humidification integrated module, characterized in that, include: A humidifier box, which is connected to the air supply duct of a fresh air system via a snap-fit ​​structure; A microporous diffuser plate, placed inside the humidifier box, is used to diffuse fragrance as airflow passes through.

4. A humidification integrated unit, characterized in that, include: Ultrasonic atomizer; The atomizing pipeline connects the ultrasonic atomizer to the air supply duct, injecting water mist into the air as airflow passes through.

5. The system according to claim 1 further includes a climate adaptive submodule, which is used to maintain the supply air temperature at approximately 20 degrees Celsius in northern mode and at approximately 25 degrees Celsius in southern mode.

6. The system according to claim 1, wherein the control module adopts an algorithm combining PID and fuzzy control to implement closed-loop control using dual temperature sensor signals to maintain stable air supply temperature.

7. The system according to claim 1, wherein the electric air valve automatically adjusts its opening degree according to the temperature difference fed back by temperature sensor 1 and temperature sensor 2, so as to dynamically balance the fresh air flow and temperature difference.

8. The system according to claim 1, wherein the variable frequency induced draft fan automatically adjusts its speed according to the temperature difference and the instructions output by the control module to optimize system energy consumption.

9. The method according to claim 2, wherein the temperature difference is used as input to the PID and fuzzy algorithm to ensure that the air supply temperature fluctuation does not exceed 1 degree Celsius.

10. The method according to claim 2 further includes predicting the heat collection efficiency based on real-time solar irradiance and adjusting the opening of the electric fan valve and the speed of the variable frequency induced draft fan in advance to avoid energy waste.

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