1037 results about "Air door" patented technology

The invention relates to the technical field of control and regulation systems, in particular to a hearth auxiliary regulation control system which comprises a data processing module, an analysis module, a control module, a regulation and control module, an optimization module and a safety early warning module. The data processing module collects temperature data of a hearth combustor area, a water cooling wall and a tail flue in real time through a distributed temperature sensor network, and a dynamic combustion field three-dimensional model is generated through Kalman filtering denoising, redundancy cross validation and a temperature compensation algorithm in combination with combustor flame position signals and an air door opening state. And the optimization module updates the strategy weight based on the combustion efficiency improvement rate, and reinforces learning to extend the adaptive boundary of the strategy library. And the safety early warning module calculates the matching coefficient of the pipe wall temperature and the allowable stress in real time, triggers a grading intervention strategy to reduce the overtemperature risk, forms full-process closed-loop control, and improves the thermal efficiency and the operation safety of the boiler.

The invention relates to the field of mine ventilation, in particular to an intelligent adjusting method and system for mine ventilation. The method comprises the following steps: constructing a dynamic topology model taking a roadway as an edge and taking a fan and an air door as nodes based on a mine CAD drawing; acquiring the actual wind pressure and the actual wind volume of each roadway branch in real time, performing inversion to obtain the current wind resistance, and updating the wind resistance attribute of the edge in the dynamic topology model by using the current wind resistance; calculating the optimal air volume of the roadway branch by using the updated dynamic topology model; based on the optimal air volume, target regulation and control parameters of the draught fan and the air door are obtained through solving by means of a particle swarm algorithm; and according to the target regulation and control parameters, the fan and the air door are adjusted through a fuzzy PID algorithm. The problem that in the prior art, mine ventilation adjustment is not intelligent and safe enough is solved, the theoretical optimal air volume is obtained through deep analysis of the mine, then ventilation adjustment is conducted step by step, and the scientificity and efficiency of ventilation adjustment are improved.

The invention relates to the technical field of boiler combustion control, and discloses a boiler closed-loop combustion dynamic optimization control system based on big data, and the system comprises an intelligent sensing module which is used for obtaining and outputting time-synchronized monitoring data in real time; the edge calculation module is used for processing multi-source sensor data in real time, realizing data credible processing and combustion state feature coding, and executing local caching of working condition perception; the digital twin modeling module is used for constructing a combustion process dynamic model and realizing real-time prediction of a combustion state; the optimization control module is used for dynamically adjusting combustion parameters and achieving collaborative optimization of the air-coal ratio, the opening degree of a secondary air door and the over-fire air ratio; and the closed-loop execution module is used for executing and feeding back the control instruction and realizing transmission and closed-loop verification of the control instruction. The combustion efficiency can be improved, pollutant emission can be reduced, and the stability and safety of boiler operation can be enhanced.

The invention discloses an intelligent control method and system for an automobile air conditioner, and relates to the technical field of intelligent sensing control of air conditioners. The intelligent control method and system for the automobile air conditioner comprise the steps that S1, multi-source data are collected and preprocessed, and a standardized data set is constructed; s2, multi-path temperature difference coupling characteristics are evaluated based on the standardized data set, and the cold and hot air mixing proportion and the air door opening degree are dynamically adjusted; s3, the adjustment adaptability of the multi-source temperature difference and the air outlet speed is analyzed, and opening and closing of an air door and the air supply flow are adjusted; s4, evaluating the thermal response coordination and execution stability of the channels, and adjusting the proportion and control priority of the cold and hot channels; and S5, air door adjustment and response consistency is monitored, the airflow adjustment track is corrected, and mismatch response is analyzed. The problems that most current automobile air conditioning systems cannot dynamically adjust the mixed airflow proportion according to the air inlet temperature change, the evaporator outlet temperature difference and the air blowing opening real-time temperature gradient, so that frequent manual intervention of a user is caused, and comfort and energy efficiency are affected are solved.

The invention discloses a six-dimensional judgment intelligent operation and maintenance diagnosis method and system for an oil field gathering and transportation station yard, and belongs to the technical field of oil field gathering and transportation intelligent operation and maintenance. Comprising a data acquisition and single point location model establishment module, a six-dimensional analysis and judgment module, a six-dimensional fusion processing module and a feedback updating module, comprising flow, pressure, temperature, liquid level, water content, pump frequency / current, valve position / state position, furnace gas amount / air door and station control alarm position data in an oil field gathering and transportation station. According to the six-dimensional judgment intelligent operation and maintenance diagnosis method and system for the oil field gathering and transportation station, by integrating multi-link analysis, dynamic threshold adjustment, a closed-loop optimization mechanism and safety guarantee design, the problems that current diagnosis is poor in stability, insufficient in precision, weak in decision support and the like are solved; and reliable technical support is provided for efficient and stable operation of an oil field gathering and transportation station.

The invention discloses an automobile air conditioner intelligent diagnosis and assessment method and system, and relates to the technical field of automobile air conditioner intelligent manufacturing. The intelligent diagnosis and assessment method and system for the automobile air conditioner comprises the steps that S1, multi-point temperature, air volume, airflow and environment data in the operation process of the air conditioner are collected and preprocessed, and a standardized vehicle-mounted state data set is constructed; s2, evaluating the comfort adjusting capacity and dynamically adjusting the opening degree of the air door in combination with the temperature and humidity air change and the stability approaching time; s3, the parameter recovery speed and the thermal load intensity are analyzed, and the air door switching rhythm is adjusted; s4, integrating comfort and environment adaptability evaluation results, and executing regulation and control resource redirection; and S5, jointly monitoring the environmental pressure and the regulation and control capability value, constructing a cross-scene scoring system, and marking strategy switching nodes. The problems that an existing air conditioning system lacks an assessment index with cooperation of a use scene and an environment as a core, and the control performance cannot be dynamically assessed in a cross-environment mode are solved.

The invention provides an intelligent control algorithm for dust removal of a steel ore tank and an operation effect monitoring method thereof, and aims to improve the energy efficiency and emission control capability of a dust removal system of the steel ore tank. The system comprises a data acquisition module, a hierarchical control module and a multi-objective optimization module. The data acquisition module is used for acquiring dust concentration, fan rotating speed, energy consumption and equipment state signals in real time; the hierarchical control module adopts the combination of model predictive control (MPC) and fuzzy PID control to accurately adjust the rotating speed of a fan, the ash removal period and the opening degree of an air door; and the multi-objective optimization module dynamically adjusts the dust-energy consumption weight ratio according to the electricity price time period, and optimizes the balance between energy consumption and emission. The invention further comprises an operation effect monitoring method, the operation effect of the system is monitored in real time, the energy-saving effect is evaluated and optimization suggestions are provided by means of data comparison and analysis, comprehensive evaluation of the energy-saving rate and the performance, visualization of a monitoring report and the like. And green transformation and low-carbon emission targets of a dust removal system of the steel and iron ore tank can be realized.

The invention provides a temperature control method and system for an automatic production line of a varnish-baking door. According to the method, a three-dimensional thermal field model including position coordinates, temperature difference values and area proportions is generated by dynamically scanning marching door body surface temperature distribution data; thirdly, a three-layer air duct system with the top, the middle and the bottom independently adjusted is constructed, the rotation angle and the airflow intensity of the flow guide plate of the corresponding layer are dynamically adjusted, and an airflow covering mode matched with the door body curved surface is formed; when the area proportion of the abnormal region exceeds the standard, the opening degree of an air door is adjusted, and a compensation air volume increment coefficient is synchronously calculated to generate a hierarchical compensation instruction; finally, the heat dissipation intensity is adjusted through an increment coefficient, and a directional heat dissipation loop is formed by cooperating with flow guide plate angle correction and a static pressure box vortex suppression device. According to the technical scheme provided by the invention, dynamic sensing of temperature abnormity in the curing process of the special-shaped door plate, multi-level airflow accurate compensation and closed-loop control of over-temperature protection are realized, and the curing uniformity and quality stability of a paint surface are improved.

The invention relates to the technical field of fabric treatment equipment, in particular to fabric treatment equipment, a drying control method and electronic equipment. The fabric processing equipment comprises a fabric processing barrel and a drying system, the drying system comprises a plurality of sub-air ducts, and the sub-air ducts are all communicated with the interior of the fabric processing barrel to achieve regional air supply in the fabric processing barrel; each sub-air duct is provided with a sub-air door which can be controlled and adjusted; the controller is electrically connected with the multiple air duct air doors, and in the drying process, the controller cooperatively controls all the air duct air doors by obtaining temperature and / or humidity parameters of different areas in the fabric processing barrel, and uniform drying and heating of the fabric in the fabric processing barrel are achieved. According to the device, the multiple sub-air ducts correspond to all the designated areas, uniform covering and accurate adjustment of hot air in the fabric processing barrel can be achieved, and therefore the drying efficiency of the fabric is improved, and the use experience feeling of a user is improved.

The application relates to a high-efficiency lift flapping wing, a dragonfly-imitating aircraft and an aircraft flight posture control method. The high-efficiency lift flapping wing comprises a flapping wing body and a plurality of one-way air door blades; a plurality of air vents are arranged on the flapping wing body, each one-way air door blade covers the air vent, and the one-way air door blade is used for allowing airflow to pass through the air vent in one direction. The high-efficiency lift flapping wing, the dragonfly-imitating aircraft and the aircraft flight posture control method have the advantages of high lift efficiency, reduced flapping wing burden, improved aircraft service life and stability.

The utility model relates to a temperature control device with double refrigerating systems. The temperature control device comprises a first chamber, a second chamber, a first refrigerating unit, a second refrigerating unit and an electrical control system, wherein the first air outlet electric air door, the first air outlet, the third air outlet and the third air outlet electric air door are sequentially connected, and the first air outlet and the third air outlet are further connected with the air outlet of the first chamber; the second air outlet electric air door, the second air outlet, the fourth air outlet and the fourth air outlet electric air door are connected in sequence; the second air outlet and the fourth air outlet are further connected with the air outlet of the second chamber; the first return air inlet electric air door, the first return air inlet, the third return air inlet and the third return air inlet electric air door are sequentially connected, and the first return air inlet and the third return air inlet are further connected with the return air inlet of the first chamber; the second return air inlet electric air door, the second return air inlet, the fourth return air inlet and the fourth return air inlet electric air door are sequentially connected, and the second return air inlet and the fourth return air inlet are further connected with the return air inlet of the second chamber.

The utility model provides a hopper of a grab ship unloader, which relates to the technical field of ship unloaders and comprises a hopper body, an opening is arranged at the upper end of the hopper body, a first wind blocking wall, a second wind blocking wall, a land side wind blocking door and a sea side wind blocking door are respectively arranged at the upper end of the periphery of the opening, and the sea side wind blocking door comprises a first door body and a second door body. One side of the first door body is connected with a first wind shielding wall, one side of the second door body is connected with a second wind shielding wall, a moving gap is formed between the first door body and the second door body, and first spraying assemblies are arranged on the side, close to the second door body, of the first door body and the side, close to the first door body, of the second door body correspondingly. The upper end of the first wind shielding wall is rotationally connected with a first sealing cover, the upper end of the second wind shielding wall is rotationally connected with a second sealing cover, and third spraying assemblies are arranged on the opposite sides of the first sealing cover and the second sealing cover. And through comprehensive closed design and comprehensive application of the spraying assembly, generation and flying of dust are remarkably reduced, and the working environment is improved.

The invention discloses a mining air volume monitoring and control system, which relates to the technical field of coal mine safety ventilation and comprises a plurality of intrinsically safe sensors, at least one group of intrinsically safe control boxes, a controller and a power supply, the GQQ5 smoke sensor is connected with the sensor through a flame-retardant communication cable for a coal mine or in an infrared correlation mode to realize data convergence and instruction issuing, and the at least one intrinsic safety type base station is connected with a ground control center through a communication optical cable to support TCP / IP protocol transmission monitoring data. Dust concentration response is dynamically analyzed in combination with the wind speed change trend, linkage control over wind speed and dust concentration is achieved, the opening degree of an air door can be automatically adjusted or a spraying device can be controlled according to the dust raising trend, the underground dust treatment effect is effectively improved, and the method has the advantages of being high in practicability and improving the automation level of ventilation dispatching.

The invention relates to the technical field of mine safety equipment, in particular to a mining intelligent air door locking and air speed sensing control device. According to the technical scheme, the mining intelligent air door locking and wind speed induction control device comprises an air door channel body, multiple sets of locking mechanisms, an air door body, a displacement sensor, a wind speed sensor, an environment detection mechanism, a control unit, an alarm mechanism and a sealing assembly, and the multiple sets of locking mechanisms are arranged on one face of the air door channel body; an air door body is arranged at one end of the locking mechanism, and a displacement sensor is arranged on the surface of one end of the locking mechanism. By adopting the physical locking combination of the electromagnetic bolt mechanism and the dual-redundancy mechanical spring bolt and integrating the pressure sensitive diaphragm to monitor the sudden pressure change of the air duct, the safety redundancy of the locking mechanism is remarkably improved, and under the abnormal working condition, the system can automatically trigger locking and cut off a power source to prevent the air door from being opened unexpectedly, so that the safety of the air door is improved. The stability of a mine ventilation system is ensured.

The invention relates to the technical field of drying equipment, in particular to a vertical circulating fruit and vegetable drying machine with a heat recovery structure and a drying method. The vertical circulating fruit and vegetable drying machine with the heat recovery structure comprises a drying machine body, and a heat recoverer, a heater, a circulating fan and a drying chamber which are arranged in the drying machine body in the fresh air flowing direction; the heat recoverer is provided with a first air outlet used for exhausting waste gas. An inner circulation air door and an outer circulation air door are arranged on the side wall of the drying chamber and used for air outlet. The drying machine has the beneficial effects that key air doors such as the inner circulation air door, the outer circulation air door, the hidden push-pull air door and the second air outlet are arranged, the multiple air doors can intelligently switch three modes of total heat exchange, simple circulation and inner circulation according to high, medium and low humidity stages of the drying process, heat recovery and moisture removal balance is dynamically optimized, and the drying efficiency is improved. And the energy consumption is obviously reduced.

The utility model discloses a pulse back-blowing dust remover which comprises a shell, a dust removal unit is arranged in the middle of the shell, a dust removal assembly used for filtering dust is arranged in the dust removal unit, a dust removal subarea is arranged above the dust removal unit, airflow enters the dust removal subarea through the dust removal assembly, and the dust removal subarea is communicated with an exhaust pipeline through a stop valve. The side face of the shell is provided with an air inlet communicated with the air purification chamber, the air inlet is provided with an inwards-opened air door, the air door comprises a door plate, the upper end side of the door plate is hinged to the shell, the door plate is provided with a balance weight and a sealing strip, and closing and sealing of the air door can be achieved by means of self weight. A position sensor is arranged at the door plate to detect opening and closing and opening degree of the door plate, a pulse blowing assembly is arranged above the dust removal unit, the position of the door plate is sensed through the position sensor, and opening or closing of a stop valve and pulse back blowing are controlled. And high-pressure air is saved, the ash removal capability is high, the dust removal efficiency is high, the energy consumption is low, and the operation is stable and reliable.

The invention provides a power plant fuel blending combustion optimization method based on multi-source data and deep learning, and the method comprises the steps: detecting key characteristic indexes of incoming fuel, and constructing a dynamically updated fuel characteristic database; based on the fuel characteristic database, the boiler operation parameters and the load prediction data, a real-time fuel blending scheme is generated through a multi-objective optimization algorithm; performing a virtual combustion test on the real-time fuel blending scheme by using the three-dimensional combustion model of the boiler, and adjusting the opening degree of a secondary air door in the real-time fuel blending scheme; the method comprises the following steps: recording a data chain of fuel in a whole life cycle from factory entry to combustion through a block chain technology, generating a tamper-resistant carbon emission report, and when unconventional fuel is subjected to blending combustion, adapting combustion characteristics of the unconventional fuel through a transfer learning algorithm and generating a safe blending combustion proportion threshold value. And a real-time fuel blending scheme is generated and optimized through virtual testing, so that the fuel blending combustion optimization efficiency is effectively improved.

The utility model belongs to the technical field of automobile air conditioners, and particularly relates to an axial flow type double-layer flow air conditioning box structure which comprises an air inlet box and a distribution box which are installed on the same straight line, an inner circulation air inlet, an outer circulation air inlet and a switching air door are arranged in the air inlet box, and a filter screen, an evaporator core body, a plurality of air outlets and a partition plate are arranged in the distribution box. A partition plate is arranged in the distribution box and divides the distribution box into an upper-layer flow channel and a lower-layer flow channel, a double-end axial flow fan is further arranged in the air inlet box and comprises a motor, an upper impeller and a lower impeller are arranged at the upper end and the lower end of the motor respectively, and the upper impeller is used for conveying inlet air of the inner circulation air inlet or the outer circulation air inlet into the upper-layer flow channel. The lower impeller is used for conveying inlet air of the inner circulation air inlet or the outer circulation air inlet into the lower-layer flow channel; the problems that an existing air conditioning box is large in size and not beneficial to optimization of in-vehicle space layout, and a traditional middle-mounted air conditioner is difficult to achieve a double-layer-flow air inlet mode are solved.

The invention discloses an intelligent monitoring and early warning warehouse for tea storage, and relates to the technical field of agricultural product storage monitoring and intelligent early warning. An acoustic respiration sensing array, a quantum dot gas mapping film and optical excitation imaging, long-wave infrared polarization insect trace detection, and an edge calculation and actuator cluster are integrated in the warehouse body; a limited scanning sector is triggered by acoustics first sense, a VOC / ammonia concentration heat map and a polarization disturbance heat map are obtained, graded early warning is output through time-space fusion consistency scoring, and low-energy-consumption zoning intervention is achieved through model prediction control cooperation dehumidification, air supply, cold plasma and a zoning air door. In cooperation with reference self-correction, channel health detection and fault-tolerant synchronization, a monitoring-decision-regulation-re-monitoring closed loop is formed, and mildew / insect pest early warning and traceable management are achieved under the condition that packaging is not damaged.

The invention provides a coal mine underground air door intelligent control method and system based on direct connection communication, and the method comprises the steps: when the number of a vehicle passing through an air door is single and the distance between the vehicle and the air door meets a first condition, the vehicle passes through the air door; a first message is sent to a direct connection communication roadway side device installed on a roadway side through a direct connection communication terminal device installed on a vehicle, wherein the first message comprises vehicle position information, speed information and passing request information containing a vehicle encrypted digital signature; the direct connection communication lane side equipment receives the first message, verifies the legality of the vehicle encrypted digital signature, and sends the vehicle position information and speed information passing verification to an air door controller; and generating an air door control strategy based on the vehicle position information and the speed information, and controlling an air door to execute opening or closing action based on the air door control strategy. According to the technical scheme, the control efficiency and accuracy are improved, and meanwhile automatic air door closing can be achieved in the dangerous case.

The invention belongs to the field of artificial intelligence, particularly relates to a multivariable self-optimization control coal mill agent operation method, and aims to solve the problems of variable coupling interference, parameter solidification lag and poor working condition adaptability in traditional control. According to the strategy, an attention mechanism-based LSTM dynamic model is constructed, and future states of six types of variables such as air volume and temperature are predicted; defining a weighted optimization function fusing powder making efficiency, energy consumption, wear and stability, and introducing a soft constraint to guarantee a safety boundary; an optimal control combination is searched on line every five seconds by adopting a depth deterministic strategy gradient algorithm, and the four-dimensional action space of an air door, a hot blast valve, a coal feeder and a grinding roller is covered; and triggering an incremental learning fine tuning model through residual feedback to prevent disastrous forgetting. According to the scheme, multivariable cooperation, online self-optimization and intelligent safety control under all working conditions are realized, and the dynamic response capability and the comprehensive operation efficiency of the coal mill are remarkably improved.

The utility model relates to the technical field of baffles, and provides a baffle with a sealing device, which comprises a plate body and a door frame, the plate body is positioned in the door frame, a rotating shaft is fixedly connected to the middle of the plate body, the rotating shaft is rotatably connected with the door frame, a sealing groove is arranged on one side of the plate body abutted against the door frame, the sealing groove is positioned in the middle of the plate body, and a plurality of sealing springs are arranged in the sealing groove. One end of the sealing spring is embedded into the plate body, the end, away from the plate body, of the sealing spring extends towards the door frame, the end, away from the plate body, of the sealing spring abuts against a first sealing strip, one side of the first sealing strip is located in the sealing groove, the first sealing strip is slidably connected with the plate body, and the side, facing the plate body, of the door frame is fixedly connected with a second sealing strip. The first sealing strip abuts against the second sealing strip, and a first inclined face is arranged on the side, abutting against the second sealing strip, of the first sealing strip. By means of the technical scheme, the problem that in the prior art, when an air door baffle is closed, complete sealing cannot be achieved, and air or smoke leaks is solved.

The invention relates to the technical field of coal mine ventilation control, and discloses a coal mine ventilation integrated control system based on intelligent scheduling. The system comprises an air door operation state monitoring module, a regional ventilation influence evaluation module and a global ventilation collaborative optimization module. The air door operation state monitoring module collects air door operation data such as air pressure, gas concentration, dust concentration, air speed and air door opening degree in real time through multi-source sensor arrays arranged on all air doors of a mine. The regional ventilation influence evaluation module performs abnormal influence quantitative evaluation on the independent ventilation region of the mine according to the real-time air door operation data to generate a regional influence identifier; and the global ventilation collaborative optimization module is combined with a mine topological structure, and performs global optimization calculation of a multi-air-door collaborative control strategy according to the regional influence identifier. The system achieves comprehensive perception, scientific evaluation and global cooperative control of the mine ventilation state, improves the operation efficiency of the ventilation system, guarantees the safety of underground operation of a coal mine, and is suitable for various coal mine ventilation scenes.

The invention discloses a thermal power plant boiler combustion control method and system, and relates to the field of boiler combustion system control technical equipment. By collecting control loop data of a boiler combustion system in real time, dynamic characteristics, stability and response efficiency of a loop can be analyzed through a multi-dimensional performance evaluation model (including six indexes of steady-state tracking performance, static tracking performance, maximum control deviation, steady-state error, over-limit time and comprehensive tracking performance); based on the evaluation result, the air-coal ratio, the oxygen amount set value and the over-fire air door opening degree are dynamically adjusted through a combustion linkage algorithm, and intervention correction is conducted on set values of loops such as superheat degree control, primary air, secondary air and the coal amount of a coal mill when the performance of the control loop is deteriorated; combining a least square support vector machine to predict NOx concentration and boiler efficiency; and finally, combustion optimization is realized through closed-loop control. The problems that traditional PID control lags behind and loop coordination is poor are solved, boiler efficiency is improved, and pollutant emission is reduced.

The invention discloses a control method for automatic air distribution of a garbage incinerator, which is applied to garbage incineration power generation equipment, and the garbage incineration power generation equipment further comprises a steam boiler and a steam turbine generator unit. The garbage incinerator comprises a drying section, a combustion section and a burnout section; each section comprises two furnace bodies which are communicated with each other; each furnace body is provided with two primary air inlets, the total number of the 12 primary air inlets is 12, and the air inlet flow of primary air is controlled through one primary air baffle; the automatic air distribution system automatically adjusts a primary air baffle through PID, so that each air chamber obtains the required air volume. By adopting the technical scheme, the labor intensity of operators is reduced; adjustment is carried out according to the garbage heat value and the actual combustion working condition, the air volume needed by each air chamber is obtained through calculation, the opening degree is automatically adjusted through the air door baffle PID, automatic air distribution of the garbage incineration grate furnace is achieved, and the garbage incineration efficiency is improved.

The utility model is suitable for the field of digital printing, and provides an air suction platform and digital printing equipment. The air suction platform comprises a platform body internally provided with an air suction cavity, the upper surface of the platform body is provided with a plurality of air suction holes communicating with the air suction cavity, and the interior of the air suction cavity is divided into at least two air suction areas; the air pipe is internally provided with at least two air ducts, the at least two air ducts are in one-to-one correspondence with the at least two air suction areas and are communicated with the at least two air suction areas, the air pipe is provided with first air ports in one-to-one correspondence with the at least two air ducts, and the first air ports are used for inputting negative pressure; the baffles are arranged on the air pipe and correspond to the at least two first air openings in a one-to-one mode, and the baffles close or open the first air openings; and the air door driving assembly comprises at least two driving wheels and can synchronously drive the at least two baffles to move so as to control the air suction areas to be opened one by one until all the air suction areas are opened and close the air suction areas one by one until all the air suction areas are closed after the medium leaves. The adsorption capacity to the medium can be improved, and the phenomenon that ink is absorbed on the spray head, so that ink dripping points are influenced, and the printing effect is influenced can be avoided.

The embodiment of the present application provides a temperature adjusting method, a temperature adjusting system, a dryer and a controller for multiple dryers. Each dryer comprises a temperature adjusting mechanism, each temperature adjusting mechanism comprises a hot air door, the multiple dryers use a same heat source, and the temperature adjusting method comprises the following steps: determining a target drying temperature interval of a to-be-dried object in each dryer; in the process of starting the heat source to supply heat to the multiple dryers, acquiring the inlet temperature and the current drying temperature of the hot air door of each dryer in real time, so as to control the temperature adjusting mechanism to adjust the opening degree of the hot air door of each dryer, so that the current drying temperature is in the target drying temperature interval. The hot air is generated by the heat source, and the drying temperature required, the temperature after heat energy loss and the current drying temperature are used to realize accurate temperature control for each dryer. Therefore, heat energy is fully utilized, and the temperature adjusting method of one heat source corresponding to multiple dryers is realized.

The invention relates to the technical field of mining underground ventilation, in particular to a mining underground ventilation device which comprises a main exhaust pipeline, and an opening and closing air door is provided with blades through a shaft body. A supporting telescopic rod is installed on the inner wall of the branch pipeline, a moving frame is installed at one end of the supporting telescopic rod, a sliding groove is formed in the outer wall of one side of the moving frame, a sliding connecting rod is connected into the sliding groove in a semi-embedded mode, and one end of the sliding connecting rod is movably connected with one side of a blade through a pin shaft; a self-locking assembly is arranged between the fixed end of the supporting telescopic rod and the outer wall of one side of the movable frame, and through the arrangement of the self-locking assembly, automatic locking of the blades in the closed state is achieved through the adsorption effect of a magnetic suction plate on a connecting shaft body of a first connecting rod and a second connecting rod; the problem that the air door is opened accidentally due to the fact that a traditional thread or buckle fixing mode is prone to loosening under the impact of airflow is solved, and the sealing reliability and the operation safety of the air door under the complex working condition of a mining mine are remarkably improved.

The utility model provides a cleaning base station and a cleaning system, and belongs to the technical field of smart home, the cleaning base station comprises a frame body, a dust collection fan assembly and an air door assembly, an exhaust air duct is formed in the frame body, the dust collection fan assembly is arranged on the frame body, and an air outlet of the dust collection fan assembly communicates with the exhaust air duct; the air door assembly is arranged on the frame body and used for changing the communication state of the exhaust air channel and the air outlet of the dust collection fan assembly. According to the cleaning base station provided by the invention, when the dust collection fan assembly does not work, the air door assembly is closed, so that the exhaust air duct does not communicate with the air outlet of the dust collection fan assembly, a large amount of water vapor generated in the high-temperature mop washing process can be prevented from entering the upper space of the cleaning equipment through the exhaust air duct, and then the safety can be improved.

The invention discloses a refrigerator and a fault maintenance method of a defrosting heater of the refrigerator, n pieces of operation data of a refrigerating system are input into a trained fault diagnosis model to output a fault diagnosis result of the defrosting heater, whether the defrosting heater breaks down or not does not need to be checked in a manual troubleshooting mode, and the fault diagnosis efficiency is improved. The refrigerator fault can be automatically diagnosed in real time. Besides, when the fault diagnosis result is that the defrosting heater breaks down, the chamber temperature of the storage chamber is reduced to the preset lowest temperature, food materials are prevented from being damaged due to the fact that the temperature rises too high during defrosting, the refrigerating system is controlled to stop refrigerating, a refrigerating air door is opened, air blowing defrosting operation is conducted on the evaporator, and the refrigerating efficiency is improved. The intelligent defrosting mode is started after the fault of the defrosting heater is diagnosed, so that the refrigerator can be normally defrosted when the fault of the defrosting heater is diagnosed, and the stable operation of the refrigerator can be maintained.