14 results about "Variable air volume" patented technology

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.

This invention relates to an intelligent fume hood airflow control system based on behavior prediction and dynamic optimization, belonging to the field of laboratory ventilation control technology. The system includes: an environmental sensing module that collects real-time sensing data streams; an intelligent control decision module that dynamically adjusts the face velocity setpoint based on pollutant concentration, predicts and generates variable air volume valve control commands in advance based on the trend of moving door opening changes, and automatically switches between working and standby modes based on personnel presence; a collaborative scheduling module that interacts bidirectionally with the building management system and other fume hoods to collaboratively adjust the control strategies of each fume hood; and an execution and update module that drives the actuators and collects feedback status, triggers alarms or emergency exhaust when abnormal conditions are detected, and feeds back the abnormal events to the intelligent control decision module to update the model rule base. This system achieves predictive adjustment of fume hood face velocity, multi-condition adaptive optimization, multi-hood collaborative scheduling, and closed-loop self-updating.

The utility model relates to dustproof variable air volume control valve field provides a kind of fast detachable dustproof variable air volume control valve for laboratory, including air duct pipe body, sealing rotary plate, drive assembly, pull cover and filter screen, the drive assembly rotation is arranged on air duct pipe body, the sealing rotary plate cooperation is arranged on drive assembly, the pull cover is slidably provided with filter screen, filter screen is slidably arranged inside air duct pipe body, the utility model, simple structure, effect is remarkable, the air volume in the sealing rotary plate of drive assembly control is controlled to air duct pipe body, air is filtered by the filter screen of sliding arrangement in air duct pipe body, the pull cover is quickly disassembled to filter screen, and maintenance efficiency is improved.

The application discloses a kind of variable air volume system summer fresh air optimization control methods, it is characterized in that, by comparing indoor and outdoor air enthalpy, when outdoor air enthalpy is higher, according to the number of area, find the most unfavorable area of the largest fresh air demand, when the most unfavorable area fresh air demand changes greater than set value, using multi-objective genetic optimization control algorithm to solve the most unfavorable area room temperature set value, and with the value as the basis to calculate VAV system total fresh air quantity, and accordingly as basis adjustment fresh air valve, return air valve and exhaust valve to achieve fresh air control.The control method is suitable for fresh air ratio control in variable air volume system, and the control strategy has good robustness, and has outstanding effect in improving building multi-area indoor air quality and saving operating energy consumption.

The application relates to the technical field of vehicles and discloses a variable-air-volume in-vehicle pressurization nuclear and biological and chemical protection system and a control method and device thereof. The system comprises a nuclear and biological protection system controller, a filter-removing ventilation unit, an overpressure control unit, a nuclear and biological monitoring unit, an oxygen concentration sensor and other vehicle-mounted system parts; the filter-removing ventilation unit is composed of at least a pressurization fan and a filter absorber; the overpressure control unit is composed of at least a differential pressure monitoring component and a pressure relief valve; the nuclear and biological monitoring unit is composed of at least a nuclear radiation monitoring subunit, a chemical toxicant monitoring subunit and a biological aerosol monitoring subunit; and the other vehicle-mounted system parts at least include a VCU, a seat pressure sensor, an air conditioner controller, an internal-external circulation switching actuator and an oxygen generator. The application can at least alleviate the problem that the existing nuclear and biological protection system lacks monitoring of the oxygen concentration in the vehicle and cannot accurately control the air volume of the pressurization fan according to the oxygen concentration in the vehicle, thereby being beneficial to guaranteeing the personal safety of combat personnel.

The utility model relates to the technical field of air valve, especially a kind of variable air volume regulating air valve with temperature and humidity response, including shell, humidity sensor and temperature sensor are separately provided in the shell interior, the shell interior is rotatably connected with multiple vertical rods, vertical rod side wall is provided with recess, recess inside upper and lower ends are all provided with the slot;Multiple blades, the blade side wall is provided with notch, the notch inner wall is fixedly connected with lug, the hole groove inside is slidably connected with clamping block.Humidity sensor and temperature sensor can monitor the temperature and humidity of external airflow in real time, and accurately transmit data to the controller, and then the angle sensor real-time feedback blade rotation angle information to the controller, the controller accurately controls the operation of motor according to angle information, so as to adjust the blade to the most suitable position, this kind of accurate control can meet the subtle change requirement of air volume under different scenes, improve the adjustment accuracy of system.

The application discloses a kind of variable air volume air conditioning system sensor online calibration methods based on physical model, comprising the following steps: S1, define variable air volume air conditioning system sensor multiple groups steady-state measurement value;S2, for variable air volume air conditioning system, according to energy conservation and pressure conservation these physical models and the steady-state measurement value obtained in S1 are modeled respectively to system sensor;S3, using Bayes theorem and Monte Carlo random sampling is calibrated to temperature, humidity, flow and differential pressure sensor in different calibration domain of variable air volume air conditioning system.The application combines historical data and the physical model of system, on the basis that new sensor is not removed or installed, for the sensor offset of different working environment and aging, after calibration, the accuracy of sensor measurement value has greatly promoted, guarantee the accuracy and stability of sensor bottom layer data, so that variable air volume air conditioning system more reliably operates.

The application discloses a sintering waste heat recovery and blast cooling group control method and device, which comprises a waste heat boiler, a circular cooler and a waste heat boiler circulating fan.The waste heat boiler is used for recovering waste heat from hot waste gas of the circular cooler; the circular cooler is used for cooling sintered ore and is provided with a lower air box at the bottom, a charging trolley at the middle and an upper smoke hood at the top; the waste heat boiler circulating fan is used for sucking the sintering cooling hot waste gas into the waste heat boiler and sending the hot waste gas after heat exchange in the waste heat boiler back to the lower air box at the bottom of the circular cooler to form a hot air circulation; and the cooling fan is arranged in multiple numbers along the circumference of the circular cooler and is connected with the lower air box at the bottom of the circular cooler, so as to blow external air into the lower air box at the bottom of the circular cooler and cool the sintered ore in the sintering trolley.The application provides reliable control parameters for the group control of the cooling fan by using the hot air temperature measurement technology of the circular cooler, provides conditions for the variable air volume adjustment operation by using the cross combination of the power frequency and variable frequency fan control, and realizes the cooperation of the group control of the circular cooler cooling fan, the variable air volume adjustment operation and the waste heat recovery, so as to improve the waste heat recovery efficiency and reduce the electric power consumption of the circular cooler blast operation.

The application belongs to the technical field of laboratory equipment, and particularly relates to a chemical laboratory intelligent control system, which comprises a constant-temperature and constant-humidity control module, a variable air volume control module, a negative pressure control module, a toxic gas protection module and a central controller. The central controller is in bidirectional communication connection with the constant-temperature and constant-humidity control module, and is used for regulating the temperature and humidity in the laboratory. The central controller is in bidirectional communication connection with the variable air volume control module, and is used for stabilizing the face air speed of a fume hood. The central controller is in bidirectional communication connection with the negative pressure control module, and is used for maintaining a negative pressure environment and preventing toxic gas overflow. The central controller is in bidirectional communication connection with the toxic gas protection module, and is used for carrying out closed-loop protection according to the type of toxic gas. By using the application, the high-precision requirements of a chemical laboratory on ventilation regulation and toxic gas protection can be met.

This utility model discloses a variable air volume (VAV) device with a purging function, including a valve body, a measuring module, an air volume regulating component, and a gas storage tank. The air volume regulating component includes a valve stem positioned above the valve body and a damper blade mounted on the valve stem, adjusting the air volume by rotating the valve stem. The measuring module's detection tube is fixed inside the valve body and located in front of the air volume regulating component. The measuring module is used to collect the regional pressure difference in a local area and is connected to a differential pressure sensor through a sampling channel to achieve regional pressure difference measurement. The gas storage tank stores high-pressure gas and is connected to a purging channel for purging the inside of the valve body. A purging control valve is provided in the purging channel to release the high-pressure gas in the gas storage tank for purging the internal cavity of the detection tube or the rectifier component. This design incorporates a related air pump for high-pressure gas generation, achieving an integrated design of purging gas generation and VAV regulation, thus improving the applicability of the VAV device.

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 application discloses a paint mist interception method and system based on multi-stage filtering and pressure interlocking, and relates to the technical field of industrial waste gas treatment. The method comprises the following steps: synchronously acquiring a real-time differential pressure of a main filtering section and power source operation data to solve real-time air volume, and calculating a target real-time resistance according to the real-time air volume; deriving the resistance on a time axis to obtain a real-time slope representing a resistance growth rate; and if the resistance or the growth slope reaches a corresponding preset threshold, generating and outputting a corresponding pressure interlocking control instruction. The application is used to solve the problems of filtering state monitoring distortion under a variable air volume condition, and control response lag and system paralysis risk caused by being unable to predict rapid crust formation of high-viscosity paint mist.

The application discloses a suspension bridge variable air volume dehumidification system, which comprises a condensation dehumidification module, a rotary dehumidification module, a sensible heat exchanger and a processing / regeneration air flow path. In the processing air flow path, outdoor air is pre-cooled and dehumidified by an evaporator and then is divided into two paths by a shunt valve: one path directly passes through a mixing section through a bypass branch, and the other path enters the mixing section after sequentially passing through a rotary dehumidification module processing area and a first channel of the sensible heat exchanger through a deep dehumidification branch, and then is sent into a main cable by a supply fan after mixing. In the regeneration air flow path, outdoor air sequentially passes through a condenser, a second channel of the sensible heat exchanger, an electric heater step heating after passing through a regeneration fan, and then is discharged after entering a rotary regeneration area. A refrigeration cycle unit of the condensation dehumidification module transfers the heat of the evaporator to the regeneration air flow path through the condenser to realize energy recovery. The application reduces the load of the rotary dehumidification module and the regeneration energy consumption through condensation-rotary dehumidification cooperation and shunt mixing, realizes energy saving optimization through step heating efficiency improvement and variable air volume control adaptability.