Self-adaptive annular air draft system

Abstract

The invention discloses a self-adaptive annular air draft system which comprises an annular air pipe, at least two draught fans and a self-adaptive control module, the annular air pipe communicates with a plurality of cabins, and the two draught fans are symmetrically distributed on the two sides of the annular air pipe and further communicate with an outdoor exhaust outlet; the self-adaptive control module is electrically connected with the fan, the self-adaptive control module comprises a plurality of wind pressure sensors and a central controller, the wind pressure sensors are arranged at suction openings of the cabins in a one-to-one correspondence mode, and the central controller is electrically connected with the wind pressure sensors and the fan; the central controller receives wind pressure values detected by the wind pressure sensors and calculates the wind pressure standard deviation, and when the wind pressure standard deviation exceeds a threshold value, the central controller dynamically adjusts power distribution of the two draught fans. The power of the two draught fans is adjusted in a self-adaptive mode to ensure that the air draft amount of each cabin is uniform, a stable and consistent ventilation environment is provided for all the cabins of the ship, and the health of sailors and normal operation of equipment are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of ship systems, and in particular to an adaptive annular exhaust system. Background Art

[0002] In the field of shipbuilding technology, ships feature complex internal structures and numerous compartments, from the engine room and cargo hold to the living quarters, all of which place stringent and diverse demands on ventilation systems. A good ventilation system is not only crucial for ensuring a healthy working and living environment for crew members, effectively exhausting foul air, harmful gases, and excess moisture from the cabin to prevent mold growth and equipment corrosion, but is also a crucial component in ensuring the proper operation of various ship equipment and ensuring safe navigation. For example, it provides a suitable operating temperature and air environment for critical equipment such as engines in the engine room.

[0003] Currently, the most widely used exhaust systems on ships are linear exhaust systems. In the early days of shipbuilding, this traditional linear exhaust system, with its relatively simple structure and easy installation, met the basic ventilation needs of ships to a certain extent and dominated the field.

[0004] However, as modern ships continue to evolve towards larger, more intelligent, and more multifunctional capabilities, their interior layouts are becoming increasingly complex, placing increasingly stringent demands on ventilation systems. The drawbacks of existing linear ventilation systems are becoming increasingly apparent. Existing linear ventilation systems typically consist of multiple independent linear ventilation units, lacking effective linkage and coordination between them. In actual operation, this decentralized design leads to extremely uneven ventilation volume distribution. In compartments or areas closer to the fans, where air flow resistance is low, ventilation volume is often excessive. This not only results in significant energy waste and increased ship operating costs, but also can adversely affect airflow-sensitive equipment or items due to localized excessive air velocity. For example, in compartments housing precision instruments, excessive air flow can disrupt their proper operation and affect measurement accuracy. In cargo holds, where items are easily scattered, strong airflow can cause items to shift or even be damaged.

[0005] Conversely, in cabins or corners farther from the fans, airflow is significantly reduced due to the increasing resistance encountered by air flowing through the ducts. This significantly reduces ventilation effectiveness in these areas, preventing the timely and effective removal of polluted air and harmful gases, and creating ventilation dead zones. Long-term exposure to such conditions poses a serious threat to crew health, leading to respiratory illnesses and other problems. It can also accelerate equipment aging and damage, reducing the overall service life of the vessel. Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide an adaptive annular exhaust system that can solve the above-mentioned problems existing in the prior art.

[0007] To achieve the above objectives, this application adopts the following technical solutions: In one aspect, an adaptive annular ventilation system is provided, comprising: an annular air duct, at least two fans, and an adaptive control module, wherein the annular air duct is connected to a plurality of compartments, the two fans are symmetrically distributed on both sides of the annular air duct, and the two fans are also connected to an outdoor exhaust outlet; The adaptive control module is electrically connected to the fan, and includes a plurality of wind pressure sensors and a central controller. The plurality of wind pressure sensors are arranged in a one-to-one correspondence at the air exhaust ports of the plurality of compartments, and the central controller is electrically connected to the wind pressure sensors and the fan respectively; The adaptive control module is configured as follows: the central controller receives the wind pressure values ​​detected by each wind pressure sensor and calculates the wind pressure standard deviation; when the wind pressure standard deviation exceeds a threshold, the central controller dynamically adjusts the power distribution of the two wind turbines.

[0008] Furthermore, the central controller executes the following control logic: Taking the target wind pressure P0 as the benchmark, calculate the deviation value ΔP=│Pi-P0│ of the real-time wind pressure Pi of each cabin; Performing a weighted summation on the deviation value ΔP, where the weight coefficient is positively correlated with the distance between the cabin and the pipeline of the fan; According to the weighted deviation, the power compensation coefficients K1 and K2 are dynamically generated (K1+K2=1); The power of the two fans is adjusted to W1=K1*Wa and W2=K2*Wb respectively through the central controller, wherein Wa and Wb are the original operating power of the two fans respectively.

[0009] Furthermore, the weight coefficient is set in a graded manner according to the distance between the cabin and the pipeline of the fan, wherein: For cabins with a distance of ≤5m, the weight coefficient is 0.3; For cabins with a distance of 5m<≤10m, the weight coefficient is 0.6; For cabins with a distance greater than 10m, the weight coefficient is 1.0.

[0010] Furthermore, it also includes a fault detection module, which is used to detect the operating status of the two fans and is electrically connected to the adaptive control module; when the fault detection module detects that one of the fans has a fault, the central controller controls the faulty fan to stop running and controls the power of the other fan to gradually increase to the maximum operating power.

[0011] Furthermore, the specific control logic for controlling the power of the other wind turbine to gradually increase to the maximum operating power is as follows: increase the power by 15% every 2 minutes and maintain it for 10 seconds until it reaches the maximum operating power.

[0012] Furthermore, the annular air duct is a spiral air duct with a diameter of 160 mm, and a turbulence suppression structure is provided at the node of the spiral air duct.

[0013] Furthermore, the turbulence suppression structure is a guide fin provided on the inner wall, and the inclination angle of the guide fin decreases by 5°-15° along the airflow direction.

[0014] Furthermore, the inner wall of the annular air duct is coated with an oleophobic coating.

[0015] Furthermore, the thickness of the oleophobic coating is 80-100 μm.

[0016] Furthermore, a plurality of shock-absorbing bases are provided on the outer wall of the annular air duct.

[0017] The beneficial effects of the present application are: through the layout of the annular air duct and the intelligent adjustment of the adaptive control module, the system can monitor the wind pressure conditions in each cabin in real time. When uneven wind pressure is detected, that is, when the standard deviation of the wind pressure exceeds the threshold, the central controller will dynamically adjust the power distribution of the two fans. This intelligent adjustment mechanism allows the system to flexibly change the exhaust volume according to actual needs, ensuring that each cabin at different distances from the fan can obtain a relatively uniform exhaust effect, effectively avoiding the problem of excessive exhaust close to the fan and insufficient exhaust far from the fan in the traditional linear exhaust system, providing a stable and consistent ventilation environment for each cabin of the ship, and ensuring the health of the crew and the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0019] Figure 1 This is a schematic diagram of the adaptive annular exhaust system described in an embodiment of the present application.

[0020] In the figure: 1. Annular air duct; 2. Fan; 3. Cabin. DETAILED DESCRIPTION

[0021] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0022] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0023] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0024] like Figure 1 As shown, this embodiment provides an adaptive annular exhaust system, comprising: an annular air duct 1, at least two fans 2, and an adaptive control module, wherein the annular air duct 1 is connected to multiple cabins 3, and the two fans 2 are symmetrically distributed on both sides of the annular air duct 1, and the two fans 2 are also connected to an outdoor exhaust outlet; the adaptive control module is electrically connected to the fans 2, and the adaptive control module includes multiple wind pressure sensors and a central controller, wherein the multiple wind pressure sensors are arranged one-to-one at the exhaust outlets of the multiple cabins 3, and the central controller is electrically connected to the wind pressure sensors and the fans 2 respectively; The adaptive control module is configured as follows: the central controller receives the wind pressure values ​​detected by each wind pressure sensor and calculates the wind pressure standard deviation. When the wind pressure standard deviation exceeds a threshold, the central controller dynamically adjusts the power distribution of the two wind turbines 2.

[0025] Based on the above solution, the system structure utilizes a circular air duct 1 connecting multiple compartments 3. This circular layout allows air to circulate throughout the system, providing a physical basis for uniform ventilation compared to traditional linear ventilation systems. Furthermore, at least two fans 2 are symmetrically distributed on either side of the circular air duct 1 and connected to an outdoor exhaust vent. This layout not only increases the system's ventilation power source but also achieves wider regional coverage through rational power distribution.

[0026] The adaptive control module is the core intelligent part of the system. Among them, multiple wind pressure sensors are set one by one at the exhaust port of each cabin 3, which can accurately detect the wind pressure value of each cabin 3 in real time. The central controller serves as the control center and is electrically connected to the wind pressure sensor and the fan 2. It can receive the wind pressure data transmitted by each wind pressure sensor and calculate the wind pressure standard deviation of these data. The wind pressure standard deviation is an important indicator to measure the degree of data dispersion. When it exceeds the set threshold, it means that the wind pressure difference between each cabin 3 is large, that is, there is uneven ventilation. At this time, the central controller will dynamically adjust the power distribution of the two fans 2 according to the preset algorithm. By changing the power of the fan 2, the ventilation capacity of the fan 2 can be adjusted, and then the air intake and exhaust volume of each cabin 3 can be changed, so that the wind pressure of the entire system tends to be balanced and the uniformity of ventilation is achieved.

[0027] The adaptive annular exhaust system of the present application has many significant beneficial effects and effectively solves many problems in the prior art. First, a major breakthrough has been made in exhaust uniformity. Through the layout of the annular air duct 1 and the intelligent adjustment of the adaptive control module, the system can monitor the wind pressure conditions of each cabin 3 in real time. When uneven wind pressure is detected, that is, when the standard deviation of the wind pressure exceeds the threshold, the central controller will dynamically adjust the power distribution of the two fans 2. This intelligent adjustment mechanism allows the system to flexibly change the exhaust volume according to actual needs, ensuring that each cabin 3 at different distances from the fan 2 can obtain a relatively uniform exhaust effect, effectively avoiding the problem of excessive exhaust close to the fan 2 and insufficient exhaust far from the fan 2 in the traditional linear exhaust system, providing a stable and consistent ventilation environment for each cabin 3 of the ship, and ensuring the health of the crew and the normal operation of the equipment.

[0028] Secondly, the reliability and stability of the system are improved. In the prior art, since the linear exhaust system relies on a single fan 2, once the fan 2 is damaged, the entire system will be paralyzed. However, the present application adopts a design in which at least two fans 2 are symmetrically distributed, and work together through an adaptive control module. Even if one of the fans 2 fails or is damaged, the other fan 2 can continue to work and maintain the basic ventilation function of the system. At the same time, the central controller can readjust the power distribution according to the performance and actual needs of the remaining fans 2 to ensure the stability of the ventilation effect as much as possible, greatly reducing the risk of ventilation interruption due to fan 2 failure, and providing a strong guarantee for the safe navigation of the ship.

[0029] The system also offers energy-saving advantages. The adaptive control module dynamically adjusts the power of fan 2 based on actual wind pressure, avoiding energy waste caused by constant operation of fan 2 at maximum power. When wind pressure in each compartment 3 is uniform and ventilation requirements are met, the system reduces fan 2 power, reducing energy consumption and lowering the ship's operating costs, in line with the trend of energy conservation and emission reduction in modern ships.

[0030] Furthermore, the central controller executes the following control logic: First, using the target wind pressure P0 as a benchmark, calculate the deviation ΔP = |Pi − P0| of the real-time wind pressure Pi in each cabin 3. This step aims to quantify the difference between the current actual wind pressure in each cabin 3 and the ideal target wind pressure, thereby clarifying the degree to which the ventilation performance of each cabin 3 deviates from expectations.

[0031] Next, the deviation values ​​ΔP are weighted and summed, with the weight coefficient being positively correlated with the duct distance between cabin 3 and fan 2. This means that the air pressure deviation in cabins 3 farther from fan 2 has a greater weight in the overall regulation. In actual ventilation systems, cabins 3 farther from fan 2 are often more prone to insufficient ventilation or substandard air pressure. This weighting method can highlight air pressure issues in these critical cabins 3, allowing the system to give them greater attention during regulation.

[0032] Then, based on the weighted deviation sum, power compensation coefficients K1 and K2 are dynamically generated, satisfying the equation K1 + K2 = 1. The weighted deviation sum reflects the overall wind pressure deviations within each compartment 3 of the entire system. Based on this comprehensive picture, the central controller dynamically determines the power allocation ratio between the two wind turbines 2 using a specific algorithm. This dynamic generation of compensation coefficients allows the system to flexibly adjust the operating status of the two wind turbines 2 based on real-time wind pressure conditions, rather than relying on a fixed power allocation model.

[0033] Finally, the central controller adjusts the power of the two fans 2 to W1 = K1 * Wa and W2 = K2 * Wb, where Wa and Wb are the original operating power of the two fans 2. This allows for precise adjustment of the power of the two fans 2 to meet the wind pressure requirements of different compartments 3, thereby achieving uniform wind pressure and effective ventilation throughout the system.

[0034] Furthermore, the weight coefficient is set in different levels based on the distance between cabin 3 and the fan 2 duct: for cabins 3 with a distance of ≤5m, the weight coefficient is 0.3; for cabins 3 with a distance of 5m < ≤10m, the weight coefficient is 0.6; and for cabins 3 with a distance of >10m, the weight coefficient is 1.0. In this scheme, cabins 3 are divided into three ranges based on their distance from the fan 2 duct. When the distance between cabin 3 and the fan 2 duct is 5 meters or less, the corresponding weight coefficient is set to 0.3; if the distance between cabin 3 and the fan 2 duct is between 5 meters and 10 meters (inclusive), the weight coefficient is set to 0.6; and when the distance between cabin 3 and the fan 2 duct is greater than 10 meters, the weight coefficient is set to 1.0. The logic behind this hierarchical weighting is that, in actual ship ventilation systems, the ventilation effect of cabins 3 varies depending on their distance from the fan 2. In cabins 3 that are closer to fan 2, air flow is relatively easy, ventilation is generally good, and the wind pressure is less likely to deviate from the target value, and the degree of deviation is relatively small. In cabins 3 that are farther from fan 2, however, the air encounters greater resistance when flowing through the duct, making it more likely to experience insufficient ventilation and substandard wind pressure. The wind pressure is more likely to deviate from the target value, and the degree of deviation may be more serious. By setting different weight coefficients according to distance classification, the farther the cabin 3 is from fan 2, the greater the proportion of its wind pressure deviation in the overall regulation. This allows the system to focus more on improving the ventilation conditions of cabins 3 that are farther from fan 2 when subsequently adjusting fan 2 power based on weighted deviations and dynamic adjustments.

[0035] In some embodiments, a fault detection module is also included, which is used to detect the operating status of the two fans 2 and is electrically connected to the adaptive control module; when the fault detection module detects that one of the fans 2 has a fault, the central controller controls the failed fan 2 to stop running and controls the power of the other fan 2 to gradually increase to the maximum operating power. From the perspective of system reliability and safety, the fault detection module is like the "safety guard" of the system, which can monitor the operating status of the fan 2 in real time. Once a fan 2 fault is detected, the central controller can respond quickly and stop the operation of the failed fan 2 in time, effectively avoiding more serious consequences that may be caused by the continued operation of the failed fan 2, such as increased equipment damage, fire caused by electrical faults and other safety hazards, greatly improving the safety and reliability of the system and ensuring the safety of personnel and equipment on the ship.

[0036] Regarding system operation continuity, if one fan 2 fails, the central controller gradually increases the power of the other fan 2 to its maximum operating power, preventing the system from being completely paralyzed by the failure of a single fan 2. This design ensures that the system can maintain basic ventilation functions even in the event of a failure, providing necessary air circulation to the ship's cabins 3, meeting the crew's basic breathing needs and the equipment's heat dissipation requirements. This ensures that the ship's voyage is not affected by ventilation interruptions, thereby improving the continuity and stability of system operation.

[0037] From the perspective of equipment protection and cost control, the central controller gradually increases the power of Wind Turbine 2 from normal operation to its maximum operating power, fully considering the equipment's tolerance. This prevents mechanical damage and electrical overload to Wind Turbine 2 caused by a sudden and significant power increase, extending the lifespan of Wind Turbine 2, reducing the frequency of equipment repair and replacement, and lowering the ship's operating costs. Furthermore, this intelligent fault handling mechanism reduces the need for manual intervention, improves the efficiency and accuracy of fault handling, and further enhances the overall performance and economic benefits of the system.

[0038] The specific control logic for gradually increasing the power of the other fan 2 to its maximum operating power is as follows: Every two minutes, increase the power by 15% and maintain it for 10 seconds until reaching the maximum operating power. This control process is carried out in a sequential manner with fixed time intervals and power increase amplitudes. The central controller issues a power increase command to the normal fan 2 every two minutes, increasing the power of the fan 2 by 15%. After the power increase, the fan 2 operates at the new power for 10 seconds. This 10-second hold time serves two important purposes. First, it provides the fan 2 with sufficient time to adapt to the new power state, ensuring stable operation after the power increase and preventing instability such as abnormal vibration and overheating caused by the sudden power increase. Second, during these 10 seconds, the system monitors the operating parameters of the fan 2 at the new power, such as speed, current, and voltage, to determine whether the fan 2 can normally withstand the power. If the fan 2 is operating stably, the central controller will continue to issue the power increase command in the next two-minute cycle, repeating the above process until the power of the fan 2 is gradually increased to its maximum operating power.

[0039] Specifically, the annular air duct 1 is a spiral air duct with a diameter of 160 mm, and a turbulence suppression structure is set at the node of the spiral air duct. The diameter size of the air duct directly affects the flow rate and flow rate of the air in the system. The setting of the diameter of 160 mm is based on a comprehensive evaluation of multiple factors such as the ventilation requirements of the entire ship cabin 3, the performance of the fan 2, and the spatial layout. From the perspective of ventilation requirements, this diameter can ensure that when the fan 2 operates normally, there is sufficient air flow through the air duct to be delivered to each cabin 3 to meet the ventilation volume required for crew breathing and equipment heat dissipation. At the same time, combined with the wind pressure and air volume characteristics of the fan 2, the diameter of 160 mm can keep the air flow rate in the air duct at a relatively suitable level, which will neither cause air to settle in the air duct and low ventilation efficiency due to too low a flow rate, nor cause excessive noise and energy loss due to too high a flow rate.

[0040] Installing turbulence suppression structures at the nodes of spiral ducts is a key measure taken to address air flow characteristics. At duct nodes, air flow conditions can change dramatically due to changes in duct direction and connection methods, easily generating turbulence. Turbulence increases air flow energy loss, reduces ventilation efficiency, and generates significant noise, impacting the living and working environment of crew members. The turbulence suppression structure, through its specific shape and design, guides and straightens air flow, allowing air to transition more smoothly through the nodes, reducing turbulence and thereby reducing energy loss and noise, further improving ventilation system performance.

[0041] More specifically, the turbulence suppression structure is a guide fin located on the inner wall, with the guide fin's inclination decreasing by 5°-15° along the airflow direction. The guide fins are located on the inner wall at the nodes of the annular spiral duct. Their core purpose is to precisely guide the air flow. When air flows through the duct to the node, the air flow state becomes complex due to factors such as changes in the duct's direction and cross-section, and turbulence is easily generated. The guide fins act like "guides" for the air flow. They can change the air flow direction so that the air flows along a predetermined path, reducing disordered collisions and vortexes at the node, thereby reducing the probability of turbulence. The design of the guide fin's inclination decreasing by 5°-15° along the airflow direction contains profound aerodynamic principles. When the air just enters the node, the airflow speed is fast and the direction changes greatly. At this time, guide fins with a larger inclination angle are needed to strongly guide and redirect the airflow so that the airflow can quickly adapt to the change in the duct's direction. As the airflow flows forward along the guide fins, its energy is gradually dissipated, its speed slows, and its direction gradually stabilizes. At this point, if the guide fins' inclination angle remains large, it will create excessive resistance to the airflow, affecting its smooth flow. Therefore, decreasing the guide fins' inclination by 5°-15° along the airflow direction can provide just the right amount of guidance for the airflow at different stages, ensuring smooth airflow diversion at nodes while reducing resistance during subsequent flow, maintaining a smooth and orderly flow within the duct.

[0042] Generally speaking, the inner wall of the annular air duct 1 is coated with an oleophobic coating with a thickness of 80-100 μm. In a ship environment, the ventilation system is often exposed to various oil stains, such as kitchen fumes, lubricating oil vapor from mechanical equipment, etc. The 80-100 μm oleophobic coating coated on the inner wall of the annular air duct 1 can effectively prevent these oil stains from adhering. When the oil stains contact the inner wall of the air duct with the flow of air, due to the effect of the oleophobic coating, the oil stains will quickly form balls and roll off the coating surface, and will not stay and accumulate on the inner wall of the air duct. This not only keeps the inner wall of the air duct clean, reduces the problem of the air duct inner diameter becoming smaller and the ventilation resistance increasing due to the adhesion of oil stains, ensures the smooth operation of the ventilation system, but also prevents the oil stains from breeding bacteria and mold in the air duct, improves the air quality in the cabin 3, and provides a healthier working and living environment for the crew.

[0043] Preferably, the outer wall of the annular air duct 1 is provided with multiple shock-absorbing bases. During the operation of a ship, it is subject to a variety of complex external forces, such as the impact of waves, vibrations from the ship's engines, and fluctuations in water flow during navigation. These external forces are transmitted to the hull structure in the form of vibrations of varying frequencies and amplitudes. As an important component of the hull ventilation system, the annular air duct 1 is closely connected to the hull and is inevitably affected by these vibrations. The core principle of the multiple shock-absorbing bases provided on the outer wall is to absorb and dissipate vibration energy by utilizing the deformation of elastic elements. When vibration is transmitted to the shock-absorbing bases, the elastic elements (such as springs, rubber, etc.) undergo elastic deformation, converting the kinetic energy of the vibration into elastic potential energy. At the same time, during the deformation and recovery process of the elastic elements, due to internal friction within the material and interaction with the surrounding medium, some of the energy is dissipated as heat energy, thereby reducing the intensity of the vibration transmitted to the annular air duct 1 and achieving a shock-absorbing effect.

[0044] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other positions or relationships are used solely for ease of description and simplified operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0045] In this specification, reference to terms such as "one embodiment" or "example" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method 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 can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0047] The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are intended solely to explain the principles of the present application and are not to be construed in any way as limiting the scope of protection of the present application. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present application without inventive effort, and such implementations will fall within the scope of protection of the present application.

Claims

1. An adaptive annular ventilation system, characterized in that: include: An annular air duct (1), at least two fans (2), and an adaptive control module, wherein the annular air duct (1) is connected to a plurality of compartments (3), the two fans (2) are symmetrically distributed on both sides of the annular air duct (1), and the two fans (2) are also connected to an outdoor exhaust port; The adaptive control module is electrically connected to the fan (2), and the adaptive control module includes a plurality of wind pressure sensors and a central controller. The plurality of wind pressure sensors are arranged in a one-to-one correspondence at the air outlets of the plurality of compartments (3), and the central controller is electrically connected to the wind pressure sensors and the fan (2) respectively. The adaptive control module is configured as follows: the central controller receives the wind pressure values ​​detected by each wind pressure sensor and calculates the wind pressure standard deviation; when the wind pressure standard deviation exceeds a threshold, the central controller dynamically adjusts the power distribution of the two wind turbines (2).

2. The adaptive annular ventilation system according to claim 1, characterized in that: The central controller executes the following control logic: Taking the target wind pressure P0 as a reference, calculate the deviation value ΔP=│Pi-P0│ of the real-time wind pressure Pi of each of the cabins (3); Performing a weighted summation on the deviation value ΔP, wherein the weight coefficient is positively correlated with the distance between the cabin (3) and the pipeline of the fan (2); According to the weighted deviation and dynamic generation power compensation coefficients K1 and K2, (K1+K2=1); The power of the two fans (2) is adjusted to W1=K1*Wa and W2=K2-Wb respectively through the central controller, wherein Wa and Wb are the original operating powers of the two fans (2) respectively.

3. The adaptive annular ventilation system according to claim 2, characterized in that: The weight coefficient is set in stages according to the distance between the cabin (3) and the pipeline of the fan (2), wherein: For cabins (3) with a distance of ≤5m, the weight coefficient is 0.3; For cabins (3) with a distance of 5m<≤10m, the weight coefficient is 0.6; For cabins (3) with a distance greater than 10 m, the weight coefficient is 1.

0.

4. The adaptive annular ventilation system according to claim 2, characterized in that: It also includes a fault detection module, which is used to detect the operating status of the two fans (2) and is electrically connected to the adaptive control module; when the fault detection module detects that one of the fans (2) has a fault, the central controller controls the fan (2) with the fault to stop running, and controls the power of the other fan (2) to gradually increase to the maximum operating power.

5. The adaptive annular ventilation system according to claim 4, characterized in that: The specific control logic for controlling the power of the other fan (2) to gradually increase to the maximum operating power is as follows: increase the power by 15% every 2 minutes and maintain for 10 seconds until the maximum operating power is reached.

6. The adaptive annular ventilation system according to any one of claims 1 to 5, characterized in that: The annular air duct (1) is a spiral air duct with a diameter of 160 mm, and a turbulence suppression structure is provided at the node of the spiral air duct.

7. The adaptive annular ventilation system according to claim 6, characterized in that: The turbulence suppression structure is a guide fin arranged on the inner wall, and the inclination angle of the guide fin decreases by 5°-15° along the airflow direction.

8. The adaptive annular ventilation system according to any one of claims 1 to 5, characterized in that: The inner wall of the annular air duct (1) is coated with an oleophobic coating.

9. The adaptive annular ventilation system according to claim 8, characterized in that: The thickness of the oleophobic coating is 80-100 μm.

10. The adaptive annular ventilation system according to any one of claims 1 to 5, characterized in that: The outer wall of the annular air duct (1) is provided with a plurality of shock-absorbing bases.

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