36 results about "Constant air volume" patented technology

The application belongs to the technical field of heating, ventilation and air conditioning, and particularly relates to a high-strength constant air volume composite air pipe system suitable for a power control room, which comprises a metal inner lining layer, a peripheral reinforcing layer and a gradient thermal expansion transition layer between the two, a sliding interface is embedded in the transition layer or the interface, the transition layer is composed of a high-molecular elastic matrix and radially non-uniformly distributed reinforcing fibers, a linear gradient transition of a thermal expansion coefficient is realized, the sliding interface contains arrayed friction-reducing microbeads, axial displacement compensation is allowed, the system is also integrated with a constant air volume control assembly to guarantee air volume accuracy, through the above structure, thermal stress concentration is effectively eliminated, cracks are inhibited, and air tightness and control stability are maintained.

This invention discloses an automatic fuel feeding control strategy for a biomass circulating fluidized bed boiler, solving the problem of how to automatically control the rational supply of biomass fuel in the furnace to ensure stable boiler operation. This invention uses changes in the oxygen content of the flue gas at the boiler tail end to infer changes in the furnace fuel feed. Under the premise of constant air volume, an increase in oxygen content indicates a decrease in biomass fuel feed, while a decrease in oxygen content indicates an increase in biomass fuel feed. A PID control module is established with the oxygen content of the flue gas at the boiler tail end as the input value. The output value of this PID control module is used to adjust the frequency of the fuel feed screw feeder in the biomass circulating fluidized bed boiler. Furthermore, considering the unstable characteristics of biomass fuel, when the oxygen content in the furnace reaches a limit, the feedforward control mode and the lockout function mode of the PID controller are fully utilized to achieve stable boiler operation.

This application belongs to the field of production control technology, specifically relating to an environmental control system, method, and storage medium for production spaces. It includes an air supply module, an indoor air treatment module, an exhaust module, and a control module. The air supply module provides fresh air to the production space; the indoor air treatment module handles the heat and humidity load of the circulating air within the production space; the exhaust module exhausts air from the production space; and the control module controls the air supply module to operate at a constant airflow, and adjusts the exhaust module's airflow by acquiring the actual supply and exhaust volumes to create a stable negative pressure within the production space. This system effectively solves the application bottlenecks of traditional technologies in special protection scenarios. The dual-system architecture significantly reduces reliance on large ducts and ventilation trenches, adapts to space constraints imposed by thick wall structures, and effectively prevents the leakage of potentially hazardous substances.

The application relates to the technical field of biosafety equipment control, and particularly provides a biosafety cabinet constant air volume intelligent control method and system, aiming to solve the technical problem of error control of an existing scheme under a shielding working condition. To this end, the biosafety cabinet constant air volume intelligent control method comprises the following steps: collecting an operation state signal of a biosafety cabinet; determining a multi-dimensional state feature vector based on the operation state signal; obtaining a working condition judgment result based on the state feature vector; and controlling the biosafety cabinet to maintain a constant working area air volume based on the working condition judgment result. In this way, the shielding working condition of the biosafety cabinet can be accurately identified without adding additional hardware sensors, so that low-cost constant air volume intelligent control is realized.

The present application relates to the technical field of range hood, and discloses a range hood wind speed self-adaptive adjusting method, a plurality of fan currents and a plurality of fan rotating speeds are one-to-one corresponding, in the working process, the range hood works under different fan currents; and the increasing trend of oil fume concentration is judged, and an oil fume concentration increasing threshold is set for the corresponding fan current, in the constant current working process of the fan, when the increasing value of the oil fume concentration relative to the reference oil fume concentration exceeds the oil fume concentration increasing threshold, the fan works under the next larger fan current for constant current. The range hood wind increasing of the present application can be divided into multiple stages, under each stage, the working mode of constant current and constant air volume within a certain range is realized, and the wind increasing model can be intelligently corrected along with the increasing trend of the oil fume concentration, the wind resistance sensitivity is effectively improved, and the smoke exhaust effect can be further improved when the exhaust pressure of the public flue is large and the smoke exhaust is not smooth or the flue pressure suddenly changes.

The invention discloses a pressure-independent type constant air volume valve and a design method thereof. The pressure-independent type constant air volume valve comprises a valve body of a tubular structure, a valve element shaft which is fixedly installed in the valve body and is concentric with the valve body, and a pre-tightening spring which is arranged on the periphery of the valve element shaft in a sliding and sleeving mode, wherein the end, close to an outlet of the valve body, of the pre-tightening spring is fixedly connected with the valve element shaft, and the pre-tightening force is adjustable. The valve element is installed on the periphery of the valve element shaft in a sliding mode, located on the side, close to an inlet of the valve body, of the pre-tightening spring and extruded by the acting force of fluid to push the pre-tightening spring, and the two baffles are symmetrically arranged relative to the valve element, located on the side, close to an outlet of the valve body, of the valve element and fixedly installed in the valve body. The valve element is of a hemispherical shell structure, and the arc convex face of the valve element faces the inlet of the valve body. According to the pressure-independent constant air volume valve, flow can be kept constant within a wide pressure difference range under the condition that no external source power exists, and the pressure difference range of the pressure-independent constant air volume valve can be adjusted by adjusting the pre-compression amount of the pre-tightening spring.

The utility model relates to an air handling unit which comprises a unit shell, an evaporator is arranged in the unit shell and divides the unit shell into a left part and a right part, a high-static-pressure air supply fan is installed in the unit shell located at the left part, and an air return filter screen is installed in the unit shell located at the left end part. The evaporator is responsible for heating or cooling air, the high-static-pressure air supply fan is responsible for uniformly supplying the heated or cooled air into a room, and the return air filter screen ensures that the air entering the unit is clean, further purifies the air and provides clean air for the evaporator; a constant-air-volume exhaust fan and a sensible heat exchanger on the left part of the unit shell are used for carrying out heat exchange treatment on exhausted air, part of heat or cold is recycled, and the energy utilization efficiency is improved; and the fresh air filter screen and the fresh air fan are responsible for introducing fresh air and carrying out the same heat exchange treatment on the fresh air, so that the indoor air quality is ensured.

The application relates to a constant air volume control method, device and equipment of an air conditioning unit and a computer readable medium. The method comprises the following steps: collecting a first real-time static pressure difference value before and after an evaporator of the air conditioning unit; in the case that the difference between the first real-time static pressure difference value and a first preset reference difference value exceeds a predetermined range, adjusting the real-time rotating speed of a fan of the air conditioning unit until the difference between the first real-time static pressure difference value and the first preset reference difference value is within the predetermined range, and maintaining the current rotating speed for constant air volume output, wherein the first preset reference difference value is set for the evaporator in advance. Through detection of the static pressure difference value before and after the evaporator and closed-loop adjustment of the rotating speed of the fan with the preset reference difference value as the target, the technical problem that the existing constant air volume control scheme cannot realize accurate and stable control of the circulating air volume of the air conditioner is solved.

The invention provides a stepless constant air volume control method and system, electronic equipment and a storage medium, is suitable for an air conditioner, and periodically collects a current power value and a current rotating speed of the air conditioner; determining a first air volume value group according to a preset air pressure value group and the current rotating speed; the preset air pressure value group comprises a plurality of preset air pressure values, and the first air volume value group comprises a first air volume value corresponding to each preset air pressure value; determining a second air volume value group according to a preset air pressure value group and the current power value; the second air volume value group comprises a second air volume value corresponding to each preset air pressure value; determining an actual air pressure value of the air conditioner according to the first air volume value and the second air volume value corresponding to each preset air pressure value, and determining an actual air volume value of the air conditioner according to the actual air pressure value; determining a target rotating speed of the air conditioner according to the actual air pressure value, the current actual air volume value and the target air volume value; and if the target rotating speed is not consistent with the current rotating speed, adjusting the rotating speed of the air conditioner according to the target rotating speed to enable the air volume value output by the air conditioner to approach the target air volume value.

The application discloses a kind of based on target speed dynamic compensation blast motor control method and system, it is first to collect the original sampling data of blast motor, and extract out key features such as quadrature-axis current, real-time speed and bus voltage by characteristic decoupling.Then, based on the dynamics correlation of quadrature-axis current and real-time speed, dynamically inverse the real-time aerodynamic flow resistance coefficient of current gas path system.Subsequently, by comparing real-time and calibration flow resistance coefficient to determine resistance deviation ratio, and using the ratio to adaptively correct the reference speed set by user, obtain the compensation target speed to maintain constant air volume.Based on this, closed-loop operation is carried out in combination with speed deviation, and bus voltage feedforward compensation and space vector modulation are introduced to generate control signals for driving inverters.In this way, the influence of filter aging or damper switching on air duct resistance fluctuation can be effectively eliminated, and precise control of constant air volume of blast motor under variable load conditions can be realized.

The utility model discloses an integrated constant air volume pressure difference controller, including body mechanism and setting in body mechanism one side, through the way of clamping the communication cable close to the wiring terminal, reduce the cable body swing amplitude, guarantee the location mechanism of close degree of connection, the location mechanism includes the screw rod of screwing on the one side symmetry of casing and set, complete the clamping limit of cable body, finally will each compression ring respectively wear into the outside of limit rod bottom end, rotate compression ring and make it rise to push gasket fully extrude screw rod bottom's position, after fixing the height of each limit rod, clamping installation back seal plate, in the long time's use process, when communication cable shakes under external force, because the part of cable body close to the wiring terminal is pressed and clamped, its shaking degree will reduce greatly, thereby effectively reduce the situation that the communication cable is loose at the wiring terminal connection place due to the cable body shaking, guarantee the stability of communication.

The utility model discloses a fully-closed air volume control valve for a ventilating duct. Relates to the technical field of ventilation pipelines, and adopts a valve body, a first valve plate and a filter device, and a transmission case is arranged on one side of the valve body. The driving motor is started, the driving motor drives the first rotating rod to rotate, the first rotating rod drives the main gear and the first valve plate to rotate at the same time, the main gear drives the driven gear to rotate, the driven gear drives the second rotating rod to rotate at the same time, and the second rotating rod drives the second valve plate to rotate until the section of the valve body is closed. A first sealing plate arranged at the lower end of the second valve plate on the upper portion is tightly attached to a second sealing plate arranged at the upper end of the first valve plate, a second sealing plate arranged at the upper end of the second valve plate on the lower portion is tightly attached to a first sealing plate arranged at the lower end of the first valve plate, and therefore air is prevented from passing through the gap. And therefore, the sealing performance of the constant air volume control valve during use is ensured.

The invention belongs to the field of air valves, and discloses a quantitative air valve with an air volume control structure, which comprises a valve body, a self-cleaning mechanism penetrates through a shell, the inner side of the valve body is rotatably connected with a shaft column, the outer side of the shaft column is fixedly provided with a supporting seat, the shaft column penetrates through the top of the valve body and is connected with a connecting rod, and the connecting rod is connected with the air volume control structure. One side of the connecting rod is connected with a spring piece through a steel bar, one end of the spring piece is fixed to the top of the valve body, the top of the valve body is rotationally connected with a second adjusting shaft, the second adjusting shaft penetrates through the valve body, and an arc-shaped supporting plate and an adjusting plate are fixed to the outer side of the second adjusting shaft; an electric rotating mechanism is fixed to the top of the shell. According to the quantitative air valve with the air volume control structure, when the air speed is small, the spring piece plays a main role, when the air speed is large, the air bag plays a main role, through linkage of the air bag adjusting assembly and the elastic adjusting assembly, the defects of the air bag adjusting assembly and the elastic adjusting assembly can be avoided, and the advantages of the air bag adjusting assembly and the elastic adjusting assembly are enlarged.

The invention relates to the technical field of motor control, and discloses a multifunctional programmable motor control method and device and computer equipment, and the method comprises the steps: receiving a parameter message sent by an upper computer, and analyzing an operation mode parameter and a programmable motor application parameter in the parameter message; calling a corresponding motor operation mode based on the operation mode parameter, and calculating a target value based on the corresponding programmable motor application parameter in the operation mode; according to the method, free switching between a constant air volume control mode and other control modes is achieved, control application parameters of different modes are called to support motor operation, programmable setting parameters are further achieved, and the method is suitable for large-scale popularization and application. The problem that the motor control mode is single due to the fact that motor programming cannot be achieved is solved.

The utility model discloses an integrated turn-off type pressure independent type constant air volume butterfly valve, and relates to the technical field of laboratory ventilation, the integrated turn-off type pressure independent type constant air volume butterfly valve comprises a breather pipe, and the breather pipe is provided with a pressure independent type constant air volume butterfly valve body; the pressure-independent type constant air volume butterfly valve body comprises a mounting shell arranged on a breather pipe, an actuator is arranged on the mounting shell, fixing shells are arranged on the front side and the rear side of the inner wall of the breather pipe, the fixing shells on the two sides are connected with a rotating shaft, the rotating shaft is connected with the actuator, and the actuator drives the rotating shaft to rotate. The butterfly plate rotates by 90 degrees in the ventilation pipe, so that the two sides can be attached to the sealing rings on the baffles respectively, rapid sealing of the ventilation pipe can be achieved, the butterfly valve design is adopted, opening and closing are rapid, airflow can be rapidly isolated when needed, and harmful gas or microorganisms can be effectively prevented from diffusing when animal houses are killed.

The application discloses a multi-cold-source heat recovery constant air volume constant temperature and constant humidity fresh air machine, which comprises a fresh air system, an exhaust air system, a total heat exchanger, a first compressor system loop, a second compressor system loop and an air-water heat exchanger. The air-water heat exchanger is used for being automatically opened when the humidity of the fresh air entering the room is greater than the set humidity, so that external cooling water is introduced to condense and dehumidify the passing fresh air. The first compressor system loop is used for further condensing and dehumidifying the passing fresh air through a first evaporator. The second compressor system loop is used for heating the fresh air with lower temperature after twice condensation and cooling through an air-cooled heat recovery condenser, and further reducing the temperature of the water inlet through the heat exchange between a second evaporator and the water inlet of the air-water heat exchanger to improve the condensing and dehumidifying effect. The system can effectively guarantee the dehumidifying effect, so that the dehumidifying effect is not affected by the temperature change of the external cooling water, and the constant humidity purpose is achieved.

The invention relates to a control method of a ducted air conditioner, a computer storage medium and the ducted air conditioner. The control method comprises the steps that the mapping relation between the air outlet area S and the air volume q of the duct type air conditioner is preset; when the duct type air conditioner runs, the actual motor rotating speed V ', the actual coil pipe middle temperature T1 'and the actual air return pipe temperature T2' of the duct type air conditioner are obtained; based on the actual motor rotating speed V ', the actual coil pipe middle temperature T1' and the actual air return pipe temperature T2 ', the actual air outlet area S' of the duct type air conditioner is determined; based on the actual air outlet area S'and the mapping relation, the actual air volume q 'of the duct type air conditioner is determined; comparing the actual air volume q'with the corresponding standard air volume Q; and on the basis of the comparison result, the actual motor rotating speed V'is adjusted until the adjusted actual air volume q 'conforms to the standard air volume Q. By establishing the mapping relation between the air outlet area S and the air volume q, the constant air volume adjusting precision is improved.

This utility model relates to the field of valve technology and discloses an automatic variable air volume ventilation regulating valve. The ventilation regulating valve of this utility model includes: a housing, blades, an electric actuator, a sensor, and a controller. Multiple blades are rotatably mounted on the housing via a rotating shaft. The electric actuator is mounted on the housing and is driven by the rotating shaft. The sensor and controller are mounted on the housing and electrically connected to the controller. In this ventilation regulating valve, the sensor detects environmental data of the indoor space, and the controller calculates the required air volume based on the environmental data and sends a corresponding control signal to the electric actuator to control the opening amplitude of the blades, thereby controlling and regulating the air volume. This achieves automatic adjustment and precise control of the air volume according to actual needs, avoiding the situation of excessive or insufficient air volume often occurring in constant air volume systems, reducing system energy consumption, achieving energy saving and reducing resource waste.

The invention relates to the technical field of photo-thermal power generation, and particularly discloses a cooling method of a heat absorption tower and an air cooling heat absorption tower. According to the method, intelligent conversion from traditional air cooling constant air volume to on-demand air supply is achieved through intelligent control driven by temperature difference, a system monitors in real time and makes full use of the natural chimney effect, and only when natural ventilation is insufficient, the air cooling effect is achieved. Therefore, the invalid operation time and the power consumption of the fan are reduced to the maximum extent, and the power utilization rate of a power station is remarkably reduced. Meanwhile, a closed-loop automatic control system based on real-time temperature difference feedback can accurately respond to changes of power station loads and environmental conditions, stable and sufficient cooling air volume is provided for dead steam condensation all the time, and reliable operation of a cold end system is guaranteed. Due to high automation control, complexity and uncertainty of manual intervention are reduced, and the intelligent management level and operation stability of the whole power station are improved.

The invention relates to the technical field of range hoods, and provides a control method of a range hood, which comprises the following steps of: measuring corresponding rotating speed N, power W and current I of a motor of the range hood and a P-Q curve of each corresponding constant air volume by setting different constant air volumes Q under different resistance coefficients K; measuring the actual rotating speed N < actual >, the actual power W < actual > and the actual current I < actual > of the motor under the initial resistance coefficient K0; performing logical judgment on the N real and each rotating speed N, the W real and each power W, and the I real and each current I, so that a program of a cruise gear runs a proper P-Q curve; different P-Q curves can be selected according to comparison of N < real >, W < real > and I < real > with each rotating speed N, power W and current I under different K values, so that the range hood can increase the air volume and improve the oil smoke suction effect when encountering a severe cooking environment; in a good cooking environment, the air volume can be reduced, the oil smoke suction effect is guaranteed, noise is reduced, and the user experience is improved.

The present application relates to the technical field of photo-thermal power generation, and specifically discloses a cooling method of a heat absorption tower and an air-cooled heat absorption tower. The present application realizes the intelligent transformation from the traditional air cooling "constant air volume" to "on-demand air supply" through the intelligent control of temperature difference driving, and the system monitors in real time and fully utilizes the natural chimney effect. Only when the natural ventilation is insufficient, the fan starts to compensate, thereby minimizing the invalid operation time and power consumption of the fan, and significantly reducing the power station auxiliary power rate. At the same time, the closed-loop automatic control system based on real-time temperature difference feedback can accurately respond to the changes of power station load and environmental conditions, always providing stable and sufficient cooling air volume for the exhaust steam condensing, and ensuring the reliable operation of the cold end system. The high degree of automatic control reduces the complexity and uncertainty of manual intervention, and improves the intelligent management level and operation stability of the entire power station.

The application discloses a PID control strategy of a biomass fuel feeding system of a circulating fluidized bed boiler, and solves the problem of how to scientifically and rationally design the PID control strategy of the biomass fuel feeding system according to the characteristics of the circulating fluidized bed boiler of the biomass fuel; the application reversely judges the change of fuel feeding according to the change of oxygen content of flue gas at the tail of the boiler, that is, under the premise of constant air volume, if the oxygen content increases, it indicates that the biomass fuel feeding amount decreases, and if the oxygen content decreases, it indicates that the biomass fuel feeding amount increases; a PID control module is established with the oxygen content of flue gas at the tail of the boiler as an input value, the frequency of a fuel feeding screw feeder of the circulating fluidized bed boiler of the biomass fuel is regulated by the output value of the PID control module, and scientific and rational automatic control of the fuel feeding screw feeder is realized.

The invention discloses an automatic control strategy for fuel feeding of a biomass circulating fluidized bed boiler, and solves the problem of how to automatically control reasonable supply of biomass fuel of a hearth so as to ensure stable operation of the boiler. According to the method, the change of hearth fuel feeding is reversely deduced through the change of the oxygen content of flue gas at the tail of the boiler, on the premise that the air volume is not changed, if the oxygen content is increased, the biomass fuel feeding amount is reduced, and if the oxygen content is reduced, the biomass fuel feeding amount is increased; the method comprises the following steps of: establishing a PID (Proportion Integration Differentiation) control module which takes the flue gas oxygen content of a tail flue of a boiler as an input value, and regulating and controlling the frequency of a fuel feeding screw feeder of the circulating fluidized bed boiler of biomass fuel according to an output value of the PID control module; and aiming at the unstable characteristic of the biomass fuel, when the oxygen content of the hearth is limited, the feed-forward quantity control mode of the PID controller and the locking function mode of the PID controller are fully utilized, so that the stable operation of the boiler is realized.

The invention provides a static pressure detection method, air treatment equipment and a storage medium, and belongs to the technical field of air conditioner control. The method comprises the steps that in response to a received static pressure detection starting instruction, a first constant air volume meter is obtained; under the condition that the exhaust motor is started and the fresh air motor is closed, the static pressure value of the exhaust duct is determined, and the static pressure value of the exhaust duct is the static pressure value of the exhaust duct when the actual exhaust power and the theoretical exhaust power meet the first preset condition; based on the static pressure value of the exhaust duct, a second constant air volume meter is obtained; and under the condition that the exhaust motor operates at the exhaust rotating speed corresponding to the first static pressure value and the fresh air motor is started, the static pressure value of the fresh air duct is determined, and the static pressure value of the fresh air duct is the static pressure value of the fresh air duct when the actual fresh air power and the theoretical fresh air power meet the second preset condition. According to the scheme, the static pressure values of the exhaust air duct and the fresh air duct are decoupled, so that the problem that the measured static pressure values of the air ducts are inaccurate is solved, and the accuracy of double-air-duct static pressure detection is improved.

This invention belongs to the field of HVAC technology, specifically a composite duct system made of color steel plate integrating noise reduction and constant air volume control. It includes a composite duct body composed of a sound-permeable inner lining, an acoustic functional interlayer, and a color steel plate outer shell. An air volume control module, an embedded signal acquisition module, and a control module are integrated within the duct body. The control module includes streamlined movable adjustment components and their driving actuators. The signal acquisition module acquires the flow channel pressure difference to provide real-time air volume feedback. The control module dynamically adjusts the air volume accordingly. Through this integrated design, low-noise, precise constant air volume control is achieved, reducing system resistance and space occupation, and improving acoustic performance and thermal efficiency.

The application discloses a precise aeration system and control method of sludge-membrane composite MBBR, and relates to the technical field of sewage treatment. The system comprises a sludge-membrane composite MBBR biochemical tank, a forced aeration system, an online instrument monitoring system, an upper computer and a field PLC control system. The sludge-membrane composite MBBR biochemical tank is divided into an aerobic zone I, an aerobic MBBR zone and an aerobic zone II along the water flow direction. The forced aeration system comprises a micro-porous aeration blower and a perforated pipe aeration blower. The micro-porous aeration blower is connected with a first main pipeline, the first main pipeline is connected with a first branch pipeline and a second branch pipeline, and the perforated pipe aeration blower is connected with a second main pipeline. The control method adopts a constant air volume control strategy in the aerobic zone I, adopts a constant dissolved oxygen control strategy in the aerobic zone II, and realizes dynamic dissolved oxygen control in the aerobic MBBR zone based on feedforward in the aerobic zone I and feedback in the aerobic zone II, so that the control accuracy is greatly improved, and the maintenance cost is low.

The invention discloses a PID (Proportion Integration Differentiation) control strategy of a biomass fuel feeding system of a circulating fluidized bed boiler, and solves the problem of how to scientifically and reasonably design the PID control strategy of the biomass fuel feeding system according to the characteristics of the biomass fuel circulating fluidized bed boiler. The change of fuel feeding is reversely judged according to the change of the oxygen content of the flue gas at the tail of the boiler, that is, on the premise that the air volume is not changed, if the oxygen content is increased, the biomass fuel feeding amount is reduced, and if the oxygen content is reduced, the biomass fuel feeding amount is increased; a PID (Proportion Integration Differentiation) control module taking the flue gas oxygen content of a tail flue of a boiler as an input value is established, and the frequency of a fuel feeding screw feeder of the circulating fluidized bed boiler of biomass fuel is regulated and controlled by an output value of the PID control module, so that scientific and reasonable automatic control on the fuel feeding screw feeder is realized.

The utility model relates to the technical field of clean air conditioning units, in particular to a hot standby constant air volume four-channel clean air handling unit which comprises a shell, a plurality of fresh air openings are formed in the side wall of the shell, and an air outlet is formed in the side, away from the fresh air openings, of the shell; the processing unit comprises a fan set arranged on the inner wall of the shell and a filter set arranged on the inner wall of the shell, the fan set is located at the position, close to the fresh air opening, of the inner wall of the shell, and the filter set is located on the side, away from the fresh air opening, of the fan set; the temperature and humidity adjusting unit is used for controlling the temperature and humidity of air flowing through the processing unit; and the control unit is used for controlling the work of the processing unit and the temperature and humidity adjusting unit. The application has the effect that the starting mode of the standby fan is changed, so that the air volume attenuation time in the process of starting the standby fan is shortened.

The invention discloses a dust removal system constant air volume control method which is suitable for a dust removal system comprising a local ventilator, a frequency converter, a dust remover and a dust suction air duct and is executed by an underground intrinsic safety type controller. The method comprises the following steps: identifying and quantifying the main factor of air volume attenuation in real time in each control period, namely measuring the dust retention resistance loss delta Q1 of a dust remover through a high-precision differential pressure sensor, calculating the resistance increase delta Q2 of an air duct based on a micro pitot tube array and a Darcy formula, and evaluating the voltage of a power grid and the performance degradation delta Q3 of a fan by utilizing a speed sensorless vector control algorithm; an active treatment strategy is independently executed aiming at each main cause, when delta Q1 exceeds 5% of a set air volume, a self-cleaning system is triggered, when delta Q2 exceeds 3%, a low-adhesion dust inhibitor is sprayed according to a friction coefficient deviation proportion, and when delta Q3 exceeds 4%, capacitance compensation or fan maintenance and replacement are started aiming at voltage drop; and performing closed-loop optimization on the threshold after treatment. The method improves the air volume stability, the dust removal efficiency and the energy utilization rate, and is suitable for the underground high-dust environment.

The invention provides a double-air-opening constant-air-volume natural wind simulating system based on a sliding rail air duct, and belongs to the field of natural wind simulating. The double-air-opening constant-air-volume natural wind simulating system comprises a double-air-opening sliding rail structure which comprises a side wall air opening, a top face air opening, a sliding rail assembly and a driving mechanism; the sensor network module comprises a wind speed and direction sensor, a temperature and humidity sensor and a CO2 concentration sensor; the intelligent control module comprises an edge calculation controller and a PLC (Programmable Logic Controller); the feature learning module is used for performing time sequence feature extraction and analysis on the wind speed and direction data and the environmental parameters by adopting an LSTM neural network, and establishing a natural wind feature database; and the cooperative control module is used for establishing a cooperative control algorithm based on double-air-port airflow interaction and generating control parameters. According to the invention, the movable double air ports are adopted, and the natural wind feature learning and cooperative control algorithm of the LSTM neural network is combined, so that intelligent natural wind simulation control is realized, and the naturalness and comfort of spatial airflow distribution are improved.