201 results about "Variable air volume" patented technology

The invention relates to the field of building automation, discloses a control method and system for a low-carbon energy-saving building system, and aims to solve the problems of insufficient multi-source data integration, dynamic response lag and the like, a distributed sensor network is adopted to collect environment, equipment and energy data in real time, a dynamic energy efficiency index matrix is generated through spatial-temporal feature fusion, and the dynamic energy efficiency index matrix is subjected to dynamic energy efficiency analysis. In combination with a deep reinforcement learning model, carbon emission, energy consumption cost and comfort are collaboratively optimized, and the system adopts a cloud edge collaboration architecture: an edge terminal realizes equipment-level millisecond response, cloud digital twin global optimization is performed, and a heterogeneous gateway and an energy router complete multi-protocol equipment linkage and energy scheduling. The innovative technology comprises air conditioner variable air volume control, illumination self-adaptive dimming, elevator colony and ant colony scheduling and actual measurement display, the comprehensive energy consumption of the system is reduced by 32.7%, the demand response reaches the second level, the PMV thermal comfort index is stabilized to be + / -0.5, and a building cluster is supported to participate in a virtual power plant. And an intelligent building low-carbon integrated scheme is provided.

The invention relates to a high-precision variable air volume valve and an air volume control method thereof. The variable air volume valve is composed of a valve body, a front valve block set, a rear valve block, two actuators and a controller, linear adjustment of the air volume can be achieved, the air volume adjustment precision is improved, and adjustment of high and low air volume intervals is supported. The controller collects pressure difference data of an inlet and an outlet through the pressure difference sensor, and the real-time air volume is calculated through a built-in Kolmogorov-Arnold (KAN) neural network model. By comparing the actual air volume with the target air volume in real time, the controller adjusts the actuator to change the opening degree of the front valve plate set and the opening degree of the rear valve plate set, and accurate air volume control is achieved. According to the technical scheme, the accuracy and the adjusting range of air volume measurement are improved, additional resistance in the air pipe is reduced, and the performance and the operation efficiency of an air conditioning system are remarkably optimized.

The invention discloses an analysis and evaluation algorithm for the temperature regulation effect of a variable air volume air conditioner terminal device, and relates to the technical field of air conditioner regulation. Generating a temperature evaluation parameter and an air valve evaluation parameter based on the operation data; based on the temperature evaluation parameters and the air valve evaluation parameters, establishing a joint judgment model; according to the method, the energy waste working condition of counteracting the regional cold and hot demand can be found in time, the passive situation that treatment is carried out after the temperature is seriously deviated is avoided through early recognition and root diagnosis of the abnormal track, and the method is suitable for large-scale popularization and application. And the indoor comfort is improved.

The invention discloses an intelligent clean air conditioner automatic control system and an integrated control method, and belongs to the technical field of clean environment control. In order to solve the problems of dispersed control, high energy consumption and insufficient dynamic response of an existing clean air conditioning system, an intelligent control algorithm and hardware facilities are integrated, a multi-parameter collaborative optimization model is constructed, and the temperature, humidity, airflow velocity and pressure of a clean workshop are accurately regulated and controlled in real time. The system comprises a central controller, a sensor network, an actuator and a control software module, an air valve and variable air volume equipment are dynamically adjusted through data fusion and a machine learning algorithm, wind resistance and turbulence are reduced, and airflow organization efficiency is optimized. Meanwhile, the system supports remote monitoring, fault self-diagnosis and self-adaptive energy-saving modes, and the operation stability and the energy efficiency ratio are remarkably improved. According to the integrated control method, the problems that a traditional system is insufficient in intelligence and high in maintenance cost are solved, and remarkable energy-saving benefits and environmental adaptability are achieved.

The invention provides a variable air volume fume hood energy consumption control method and system based on surface air speed optimization, and relates to the technical field of air conditioning. Acquiring a gas concentration monitoring data set and an energy consumption monitoring data set of the variable air volume ventilation cabinet; respectively inputting the gas concentration monitoring data set and the energy consumption monitoring data set of the variable air volume fume hood into a preset harmful gas concentration dynamic prediction model and an energy consumption prediction model, and outputting a harmful gas concentration dynamic prediction value and an energy consumption prediction value; and finally, taking the minimum energy consumption as a target, considering a harmful gas concentration safety threshold constraint, solving the target based on a genetic algorithm, obtaining an optimal surface air speed sequence of the variable air volume fume hood, and solving a fume hood surface air speed control sequence with the lowest energy consumption on the premise of strictly ensuring that the harmful gas concentration is always below a safety threshold in the process. Therefore, collaborative optimization of operation safety and energy efficiency of the laboratory fume hood is realized. According to the invention, the energy-saving performance is obviously improved while the safety is ensured.

The invention discloses a variable-air-volume air conditioner control and adjustment method and system based on parameter adjustment, and relates to the technical field of variable-air-volume air conditioner adjusting.The variable-air-volume air conditioner control and adjustment method comprises the steps that (5) according to comprehensive thermal comfort evaluation coefficients corresponding to all using partitions, fuzzy set types which all using partitions belong to are judged and obtained; and 6, according to the fuzzy set type to which each use belongs, corresponding control operation is conducted on the use subareas and the corresponding direct association subareas and indirect association subareas, energy waste of the air conditioning system can be effectively reduced by dynamically adjusting the temperature and the air volume, and especially in the area with the large personnel number change, the energy consumption of the air conditioning system can be effectively reduced. By considering various factors such as the number of personnel, the activity intensity and the thermal sensing temperature, the system can dynamically adjust operation of the air conditioning system according to actual requirements, more accurate thermal comfort control is provided, the problem of supercooling or superheating is avoided, and the thermal comfort of a user is remarkably improved.

The invention relates to the technical field of laboratory ventilation, in particular to an intelligent variable air volume laboratory exhaust system which comprises a collection module, a judgment module, an exhaust adjustment module, a determination module, an air supplement adjustment module and a correction module. The target position and the pollutant concentration are monitored in real time, the risk area is judged based on the pollutant concentration, the risk index is calculated in combination with the target position in the risk area, the exhaust air rate is adjusted accordingly, the airflow channel is determined according to the adjusted exhaust air rate and the pollution point position, airflow distribution is optimized, and the air supplement amount is adjusted in combination with the pollution point position. The exhaust air rate is corrected according to the change of the pollutant concentration, so that the long-term stable operation of the system is ensured; the problems that due to the fixed air volume and dependence on a single signal, complex and changeable experiment scenes are difficult to adapt, the response speed to emergencies is low, and consequently air exhaust lags behind, and laboratory pollutants are accumulated are effectively solved.

The invention discloses a remote continuous adjustable low-wind-resistance air distribution tee joint suitable for a complex ventilation system, and belongs to the technical field of pipeline valves, the remote continuous adjustable low-wind-resistance air distribution tee joint comprises a tee joint body, a branch pipe air adjusting device, an angle control device and a flow guide device, the tee joint body comprises two branch pipe air inlet connecting sections, a tee joint air outlet section and a tee joint base, the top end of the branch pipe air inlet connecting section is connected with an air inlet pipe through a flange, the top end of the three-way air outlet section is connected with the three-way base through a flange, and the bottom end of the three-way air outlet section is connected with an air outlet pipe through a flange. Therefore, by the adoption of the remote continuous adjustable low-wind-resistance air volume distribution tee joint suitable for the complex ventilation system, stepless variable air volume adjustment of all branch pipes of the complex ventilation system is achieved, local resistance of the tee joint is reduced, and the remote continuous adjustable low-wind-resistance air volume distribution tee joint has the advantages of being capable of achieving stepless air volume adjustment, convenient to adjust, stable in working state and the like.

The invention discloses a marine energy-saving variable air volume indirect type air conditioner, and relates to the technical field of air conditioning systems, the marine energy-saving variable air volume indirect type air conditioner comprises an air conditioner assembly, the air conditioner assembly comprises an air conditioner shell, one side of the air conditioner shell is fixedly communicated with a fresh air pipeline, and an air return opening is formed in the position, close to one side, of the top of the air conditioner shell. According to the marine energy-saving variable-air-volume indirect type air conditioner, by starting a multi-stage electric push rod, a piston plate is driven to extrude a citric acid solution forwards into a return air inlet pipeline and a fresh air inlet pipeline, in the air inlet process, the citric acid solution can enter the heat exchanger body in air flow, descaling is conducted on the pipeline in the heat exchanger body, and the heat exchange efficiency is improved. Citric acid has good chelation ability and can generate chelation reaction with ions such as calcium and magnesium in incrustation to form a water-soluble complex, so that the purpose of removing the incrustation is achieved, and the citric acid has low corrosivity to stainless steel due to weak acidity.

The invention discloses a ventilation cabinet variable air volume control method based on laboratory environment monitoring, and relates to the technical field of control regulation, and the ventilation cabinet variable air volume control method comprises the following steps: arranging a sensor and collecting laboratory data; establishing a basic fluid dynamic model of laboratory gas flow and diffusion; predicting a gas diffusion path to obtain an optimized gas diffusion path; adjusting the laboratory wind speed according to the optimized gas diffusion path to obtain a wind speed adjusting result; performing gas concentration control according to the wind speed regulation result to obtain a wind speed control result; an alarm and response mechanism is realized based on a wind speed control result in combination with a safety threshold, and alarm information and wind speed data are obtained; performing wind speed optimization and fault diagnosis based on the alarm information and the wind speed data to obtain optimized data; and generating an environment safety report and adjusting a wind speed control strategy based on the optimization data. The safety, efficiency and energy-saving performance of the laboratory fume hood are improved, and a more effective gas control solution is provided for the laboratory environment.

Disclosed in the present invention are an air volume control method, a fume hood and a computer storage medium. The air volume control method comprises: determining that an air volume control system is in a first working mode; acquiring an air exhaust volume of an air exhaust valve; determining a calculated air supplement value corresponding to the current air exhaust volume; comparing the calculated air supplement value with an air supplement reference value; if the calculated air supplement value is greater than or equal to the air supplement reference value, an air supplement valve supplementing air on the basis of the air supplement reference value; if the calculated air supplement value is less than the air supplement reference value, the air supplement valve supplementing air on the basis of the calculated air supplement value; acquiring a first air supplement volume of the air supplement valve; determining a first calculated air exhaust value corresponding to the current first air supplement volume; comparing the first calculated air exhaust value with an air exhaust reference value; if the first calculated air exhaust value is greater than the air exhaust reference value, the air exhaust valve exhausting air on the basis of the first calculated air exhaust value; and if the first calculated air exhaust value is less than or equal to the air exhaust reference value, the air exhaust valve exhausting air on the basis of the air exhaust reference value. According to the present invention, the air exhaust valve and the air supplement valve can be used in coordination with each other, so as to implement variable air volume control on the air exhaust valve and the air supplement valve of the air volume control system, thereby achieving the purposes of energy saving and safety.

The invention provides a fresh air dehumidification energy-saving control method and system, and relates to the technical field of fresh air dehumidification energy-saving control, the outdoor temperature, the outdoor relative humidity and the actual personnel number of an independent control area are obtained in real time and compared with the preset personnel number, and the number deviation is determined; when the quantity deviation meets a preset deviation threshold value and the outdoor temperature and humidity meet preset conditions, the target fresh air volume can be calculated according to the actual personnel quantity, the total fresh air volume is divided into first fresh air and second fresh air, the first fresh air is guided to a chilled water coil pipe for cooling and dehumidification, and the second fresh air is guided to a chilled water coil pipe for cooling and dehumidification; the first fresh air bypasses the chilled water coil pipe through the bypass air duct and is not cooled and dehumidified, the second fresh air bypasses the chilled water coil pipe through the bypass air duct and is not cooled and dehumidified, and then the cooled and dehumidified first fresh air and the second fresh air are mixed and conveyed to the variable air volume valve box for air volume adjustment. And a remarkable energy-saving effect and better user experience are achieved.

The present invention relates to a flow rate control simulator for optimizing indoor air, in which experimental data usable for developing an optimal control algorithm of a variable air volume (VAV) system can be secured in a short period of time, and a control method therefor. The flow rate control simulator includes: an experimental space modeling unit that sets a control region and assumption for VAV system application; a governing equation selection and analysis unit for selecting a governing equation for each control variable; a governing equation linearization unit that performs discretization through linearization of the governing equation for calculation; a governing equation solution processing unit that applies a solution for solving the governing equation; a simulator interface unit for providing a simulator interface by applying a state-space model formula; and a result confirmation and verification unit for confirming and verifying a result through simulation execution.

The utility model relates to the technical field of heating and ventilation automation control, in particular to an EC-based fan variable air volume combined type air conditioner control system which comprises a ventilation channel provided with a first air inlet end, a second air inlet end and an air outlet end, the first air inlet end is used for introducing fresh air, and the second air inlet end is used for introducing fresh air; the second air inlet end is connected to an air return pipeline of an air supply place; and the cooling component is arranged in the ventilation channel. By monitoring the enthalpy values of the air inlet side of the cooling component, the air supply pipeline and the air supply place, whether cooling capacity conveying needs to be increased or decreased indoors is judged, and when the cooling capacity needs to be increased, the enthalpy difference between the air inlet side of the cooling component and the air supply pipeline is increased, so that the cooling capacity of the system is increased; and meanwhile, only the opening degree of the regulating valve or the frequency of the centrifugal fan is regulated, so that the enthalpy value of the tail end of the system is accurately controlled along with the change of the load, and the energy-saving operation of the system is ensured while the comfortable effect of the environment is achieved.

The invention discloses a local monitoring control method suitable for a variable air volume air conditioner, and relates to the technical field of variable air volume air conditioners. The method comprises the following steps: acquiring an adjusting air volume share corresponding to each game node, adjusting the air volume of each game node, acquiring operation state data and system topology information of each VAV box of the variable air volume air conditioning system through comprehensive data acquisition, and constructing a connection structure chart to visually display a system structure. Then, the importance degree of each node in the system and the influence relation on the downstream are quantified by calculating the connectivity and the downstream dependency coefficient, adjustment priority values are calculated in combination with parameters such as the real-time room temperature deviation value and the turbulence index, and the adjustment priority values of the nodes are determined; and finally, the air volume of each VAV box is precisely adjusted according to the adjustment priority value and the air volume share, and local monitoring control of the system is achieved.

The invention provides an air conditioning system for a subway station, and the air conditioning system is based on a central air conditioning system, and air sensors which are arranged outside, inside and inside a main blast pipe, and an air return system. And secondary dynamic closed-loop feedback regulation is carried out on the air state of each area in the air pipe and the subway through an electric variable air valve, a central air conditioning system water chilling unit, a fresh air fan and an air return system which are arranged at an air outlet. Compared with a traditional variable air volume control system, the air conditioning system of the subway station has the advantages of being high in response speed, rapid in air conditioning, capable of achieving intelligent remote linkage control and capable of automatically adjusting the air state of the subway station. The whole system is efficient and convenient to operate and maintain, and manpower and material resource cost of system maintenance can be greatly reduced.

The invention provides a variable air volume control method, device and equipment based on image recognition. The method comprises the following steps: simulating turbulent flow for a target area based on a preset simulation condition to obtain temperature distribution of the target area; based on the temperature distribution of the target area, performing grid division of a predetermined size on the target area to obtain a plurality of grid areas; based on the fitting relation between the interface air volume and the air supply speed, the control temperature of each grid area and the number of people in each grid area, an area energy balance equation of each grid area is determined; and the air supply speed is controlled by minimizing the difference value between the control temperature and the design temperature of each grid area as an optimization target. The air supply speed of the air in the grid area can be dynamically controlled, then the interface air volume of the air in the grid area is controlled, the energy utilization efficiency is improved, the operation cost is reduced, the comfort requirement of a crowded area is guaranteed, and the green and low-carbon targets are achieved.

The invention relates to a ventilation and air-conditioning on-duty energy-saving operation control system and a control mode for a high-grade biosafety laboratory, an air supply system is communicated with the laboratory through an air supply pipeline, the laboratory is communicated with an exhaust system through an exhaust pipeline, and the laboratory is in an absolute negative pressure state; a certain pressure gradient is arranged between every two adjacent rooms of the laboratory to guarantee the directional airflow direction, a first air feeder and a second air feeder are arranged in the air supply system side by side and are standby for each other, a first exhaust fan and a second exhaust fan are arranged in the exhaust system in parallel and are standby for each other, and a first biological safety closed valve is arranged at the inlet end of an air supply pipeline. An air supply closed valve and an air supply variable air volume valve are sequentially arranged at the outlet end of the air supply pipeline, a second biological safety closed valve is arranged at the outlet end of the air exhaust pipeline, and an air exhaust closed valve and an air exhaust variable air volume valve are sequentially arranged at the inlet end of the air exhaust pipeline. The energy consumption is optimized, and the biological safety in a laboratory is ensured.

The utility model belongs to ventilation system technical field, and disclose detachable maintenance's variable air volume ventilation system filter device structure, including ventilation frame, the surface of ventilation frame is connected with the connecting frame, the inside jointing of connecting frame has two clamping plates, two clamping plates are connected with filter fan piece, the inside of ventilation frame is connected with ventilation fan, the utility model discloses through the outside expansion function of composite expansion spring makes the slide of upper side and the slide of lower side always receive the opposite support force, makes two slides receive the external force and opposite approach simultaneously also make two slides opposite reset separation, make the limiting rod with the inside opposite jointing fixed of connecting frame under the magnetic attraction of first magnetic absorption piece and second magnetic absorption piece, thereby convenient with clamping plate and filter fan piece and connecting frame clamping installation, avoid the situation that filter fan piece appears to fall off, and convenient with clamping plate and filter fan piece and connecting frame separate dismounting, be convenient for the maintenance to clamping plate and filter fan piece.

The application discloses a variable air volume air conditioner cross-region air conditioner box air outlet air balance debugging method and relates to the technical field of variable air volume air conditioner debugging, which comprises the following steps: collecting air volume demands of each region served by a variable air volume terminal, obtaining target range values of each region based on regional load calculation, setting an air outlet corresponding to a region with the largest air volume demand as a first air outlet, and setting the rest of the air outlets as second air outlets and subsequent air outlets; operating an air conditioning system, so that the variable air volume terminal is in a maximum opening degree operating state to obtain a maximum air volume reference value; then, adjusting system operating parameters, so that the total air volume of the variable air volume terminal is maintained within the target air volume range of the first air outlet, and initial conditions for subsequent air outlet debugging are formed. The maximum sensible heat load of each region is obtained, and the target air volume range of each region is determined in combination with a design air supply temperature difference, so that the air volume matching is ensured from the source to meet the cooling demand of the region, and the rationality and controllability of air volume distribution are improved.

1. Name of the designed product: Controller (TBMB980IP). 2. Use of the designed product: Controller for Variable Air Volume (VAV) air conditioning system control system. 3. Design points of the designed product: The combination of shape and pattern design of the product. 4. Picture or photo best indicating the design points: Fig. 1.

The present application relates to the technical field of laboratory ventilation, and particularly relates to an intelligent variable air volume laboratory exhaust system, which comprises a collection module, a determination module, an exhaust adjustment module, a determination module, a make-up air adjustment module and a correction module. The present application adjusts the exhaust volume according to the risk index calculated based on the target position and the pollutant concentration in real time, determines the air flow channel according to the adjusted exhaust volume and the pollution point position, optimizes the air flow distribution, adjusts the make-up air volume according to the pollution point position, ensures the synergistic effect of the make-up air and the exhaust air, corrects the exhaust volume according to the change of the pollutant concentration, and ensures the long-term stable operation of the system. The present application effectively solves the problems that the fixed air volume and the single signal lead to the difficulty in adapting to the complex and changeable experimental scene, the slow response to the sudden situation, the exhaust lag and the accumulation of laboratory pollutants.

The utility model discloses a variable air volume valve integrated circuit control module, which comprises a fan, a variable air volume valve main body, a circuit board mounting groove and a carriage, the variable air volume valve main body is arranged in the carriage in a sliding inlay mode, the circuit board mounting groove is arranged in the variable air volume valve main body, a baffle plate is arranged at the end part of the circuit board mounting groove, and the baffle plate is arranged in the carriage. A circuit board mounting groove is formed in the top of the variable air volume valve body, a circuit board is arranged in the circuit board mounting groove, heat dissipation strips are arranged on the top of the variable air volume valve body, pressing plates are arranged on the two sides of the interior of the circuit board mounting groove, a baffle is arranged at the end of the circuit board mounting groove, connector lugs are arranged on the two sides of the end of the baffle, and a handle is arranged in the middle of one side of the baffle. According to the utility model, the circuit board mounting groove is arranged, the circuit board mounting groove can be controlled in a drawing manner, the circuit board can be conveniently mounted through the circuit board mounting groove, the circuit board can be locked through the pressing plate, the baffle plate is arranged at the end part of the circuit board mounting groove, and the connector lugs are arranged at the two sides of the end part of the baffle plate.

The invention relates to the technical field of air conditioners, in particular to an air volume adjusting method of a variable-air-volume air conditioning system. According to the air volume adjusting method of the variable air volume air conditioning system, all the air distributors on each branch main pipe are sequentially adjusted, so that the ratio of the actual air outlet volume of the air outlet where each air distributor is located on the branch main pipe to the rated air outlet volume of the air outlet and the ratio of the branch main pipe meet the rated difference value; uniform air outlet of each air outlet under the same branch main pipe can be ensured, and the air outlet is matched with the air supply amount of the branch main pipe; and after all the air distributors are adjusted, the air valves are adjusted, so that the ratio of the actual air supply amount of each branch main pipe to the rated air supply amount of the branch main pipe and the ratio of the central air conditioner meet the rated difference value. Therefore, the problems of long adjustment period and low efficiency caused by the fact that the branch main pipes are influenced and need to be adjusted again when air volume adjustment of the air outlets is completed due to the fact that the air supply volume of the branch main pipes is adjusted firstly and then the air volume of the air outlets is adjusted in the prior art are solved.

1. Name of the product in this design: Graphical User Interface for Laboratory Intelligent Management Platform of Electronic Equipment. 2. Purpose of this design: An electronic device. 3. The key design feature of this product is its graphical user interface. 4. The image or photograph that best illustrates the design's key points: Design 2 main view. 5. Design 2 is designated as the basic design. 6. Purpose of the graphical user interface: It is used by users to view and operate equipment, environment, and safety management in the laboratory management platform. 7. Human-computer interaction method of graphical user interface: The main view of Design 1 is the main interface of the equipment management platform. Clicking "VAV" (variable air volume) (control cabinet) in the main view of Design 1 will enter the change status diagram of the Design 1 interface; The main view of Design 2 is the main interface of the environmental management platform. Clicking any air pressure value in the middle of the interface in the main view of Design 2 will enter the change status diagram of the Design 2 interface; The main view of Design 3 is the main interface of the safety management platform. Different floors can be selected to view equipment, and the equipment name can be entered to click to query the equipment. 8. Other situations requiring explanation: Other explanation: "X" in the interface represents text.

The utility model provides a differential pressure interlocking energy-saving device suitable for an indoor air conditioner, which comprises an air handling unit, a fresh air section arranged at the front end of the air handling unit, an air return section arranged above the air handling unit and an air supply section arranged at the rear end of the air handling unit, working equipment communicated with the exhaust pipe is arranged indoors, the working equipment is communicated with an energy-saving unit, the energy-saving unit comprises an electric closed valve and a variable air volume electric valve which are arranged on the exhaust pipe, the electric closed valve is electrically connected with the working equipment, and the variable air volume electric valve is electrically connected with a pressure difference interlocking device arranged indoors. According to the air conditioning system, frequent changes of the air supply and return volume and the cold and heat source consumption of the air conditioning system caused by opening and closing of the working equipment can be avoided, and the energy-saving effect is achieved.

The invention discloses a control method of a variable air volume ventilation air conditioner and an air conditioning system, and relates to the technical field of heating and ventilation control. According to the control method, the real-time evaporation temperature of the refrigerant is collected, the target evaporation temperature is updated, the total load, the real-time evaporation temperature and the target evaporation temperature are input into the load controller, the rotating speed error of the compressor is calculated, then the real-time current and the rotating speed error are input into the rotating speed controller, and the input current of the compressor is updated. In the control process of the variable air volume ventilation air conditioner, the feed-forward control part of the load controller is continuously updated. The feed-forward control part updated in real time comprises the magnetic resistance change of the compressor, the driving error is calculated when the compressor is dormant, the magnetic resistance coefficient of the rotating speed controller is updated, and the feed-forward control part is initialized according to the updated magnetic resistance coefficient, so that the control precision of the air conditioner compressor is improved.

The utility model relates to the technical field of variable air volume control, in particular to a variable air volume control device. According to the technical scheme, the device comprises an air inlet pipe, a fixing pipe and an air outlet pipe; a third frame is welded to the side end face of the air outlet pipe; a first frame is welded to the side end face of the air inlet pipe. A fan is mounted in the fixed pipe, and an exhaust pipe is mounted on the side end face of the inner wall of the fixed pipe through a connecting pipe; a guide rod is installed on the front end face of the air inlet pipe, a second driving mechanism is installed on the rear end face of the air inlet pipe, and a lead screw is arranged on an output shaft of the second driving mechanism. The air inlet pipe is sleeved with a baffle. A first driving mechanism is mounted on the baffle through a mounting block, and bristles are arranged on an output shaft of the first driving mechanism through a rotating shaft; a box body is installed on the fixing pipe, and a second discharging pipe is fixedly embedded into the rear end face of the box body. According to the utility model, variable air volume control is met, meshes are cleaned while control is carried out, and dust and sundries are prevented from adhering to internal blades to influence use.

The invention discloses a clean and intelligent multi-stage variable-air-speed tea winnowing machine capable of regulating and controlling the air direction. The tea winnowing machine comprises a winnowing box, a winnowing module and a collecting module. The upper end of the winnowing box is provided with an air inlet pipe and a feeding port, the lower end of the winnowing box is provided with an air outlet pipe, the air inlet pipe is provided with a fan, and one side of the fan is connected with a dust removal box. The winnowing module is arranged in the winnowing box and comprises a plurality of winnowing channels and a wind direction adjusting mechanism, and the wind direction adjusting mechanism can adjust the wind direction and the wind strength of each winnowing channel; the collecting module can collect the sorted tea leaves. The multiple winnowing channels and the air direction adjusting mechanisms are arranged in the winnowing box, the air direction and the air speed of each stage of winnowing channel can be adjusted through the air direction adjusting mechanisms, clean air filtered by the dust removal box is blown into the air inlet pipe through the draught fan for winnowing, and therefore the tea winnowing device adapts to grading winnowing of different types of tea.

The utility model discloses a laboratory self-adaptive variable air volume ventilation control system, and relates to the technical field of laboratory ventilation equipment control. The system comprises a temperature and humidity sensor, a pressure difference detector, a harmful gas monitoring sensor, an infrared camera, a data caching module, a multiplexing switch, a data preprocessing module, a controller module, a man-machine interaction module, a clock module, a memory module, a data transmission module, a level conversion and pulse width adjustment circuit, a variable air volume adjusting valve and a power supply module. By arranging various monitoring sensors, the temperature and humidity in a room, the indoor pollution gas concentration, the indoor personnel condition, the indoor pressure condition and the like are monitored in real time, the stability of the indoor pressure can be effectively kept through the controller module, the air supply driving unit, the air supply adjusting valve and the air feeder, the indoor pressure is flexibly adjusted and controlled, the adjusting speed is high, and the indoor pressure can be effectively controlled. The effect is good, and the constant-pressure laboratory environment effectively ensures the health of indoor workers.