150 results about "Ventilation volume" patented technology

The utility model relates to the technical field of elevators, in particular to an elevator car ventilation device capable of adjusting ventilation quantity, which comprises a car, a plurality of air outlet holes a which are distributed at equal intervals front and back are arranged on the middle lower portions of the left side and the right side of the inner wall of the car, and a plurality of air outlet holes b which are distributed in a matrix are arranged on the left side and the right side of the inner wall of the car and located above the air outlet holes a. Adjusting assemblies are arranged on the left side and the right side of the inner wall of the lift car correspondingly, each adjusting assembly comprises two L-shaped fixing vertical plates which are symmetrically arranged front and back, a shielding plate is slidably connected between the two L-shaped fixing vertical plates, and the position, close to the middle of the top edge, of the outer side of the shielding plate is in threaded connection with a pressing bolt. According to the elevator car ventilation device capable of adjusting the ventilation quantity, the opening and closing states of the air outlet hole b can be flexibly adjusted through the baffle plate in the adjusting assembly, so that the air flow is controlled, passengers can adjust the ventilation intensity according to actual requirements, and the situation that passengers feel uncomfortable due to large air flow in winter or under other special conditions is avoided.

The invention provides an air purification filter element control method and system based on environment awareness, and the method comprises the steps: collecting environment parameter data of a to-be-purified space and working state data of purification equipment, extracting the spatial and temporal change characteristics of the pollutant concentration in the environment parameter data, and generating environment characteristic data; based on the ventilation quantity and the environment characteristic data in the working state data, calculating the mass flow of each pollutant passing through the filter element, and performing weighted correction on the mass flow through a preset load coefficient to obtain a current load value; cumulative calculation is conducted on the load history data, the pressure difference distribution data and the current load value, and filter element service life parameters are obtained; target operation parameters are determined based on the filter element service life parameters and the environment parameter data, and a fan and a valve of the purification equipment are adjusted; according to the method, accurate evaluation of the state of the filter element is realized through multi-point environmental perception and load accumulation calculation, and dynamic regulation and control are performed by combining the environmental pollution degree and the service life of the filter element, so that the purification efficiency is improved and the service life of the filter element is prolonged.

The invention discloses an efficient heat dissipation high-voltage cabinet, and relates to the field of high-voltage cabinets. Through the cooperative operation of the heat dissipation fan at the bottom of the cabinet body and the ventilating fan at the top of the cabinet body, hot air and dust can quickly enter the air guide cavity through the long groove and then are exhausted through the ventilating fan, the flowing speed of air in the cabinet is increased, the heat dissipation efficiency is greatly improved, and the damage of high temperature to the high-voltage cabinet is effectively reduced through the efficient heat dissipation mode; meanwhile, the cleaning mechanism can automatically clean the filter screen, the cleaning brush can be driven by the driver to ascend, descend, rotate and transversely reciprocate, floating dust on the surface of the filter screen is cleaned in an all-dimensional mode, impurities are adsorbed, when the ventilator rotates reversely, airflow further blows off dust adsorbed by the filter screen, the filter screen is kept smooth all the time, and the stable ventilation quantity is maintained; therefore, the problems of reduced ventilation sectional area and increased airflow resistance caused by blockage of the filter screen are avoided, continuous and efficient heat dissipation of the high-voltage cabinet is ensured, frequent manual cleaning of the filter screen is not needed, and the labor cost and the maintenance time are saved.

The invention provides an underground coal mine ventilation control method and device, electronic equipment and a storage medium, and belongs to the technical field of mine ventilation. The method comprises the steps that the type and concentration characteristics of harmful gas in a target area are determined according to data collected by a biosensor array; determining time sequence data of the harmful gas according to the concentration of the harmful gas, and determining a target concentration change rate of the harmful gas according to the time sequence data; according to the concentration of the harmful gas, the target concentration change rate and the current underground acoustic wave characteristics of the coal mine, the target air volume of the target area is determined; according to the target air volume of the target area, the ventilation resistance of the target area and the current opening degree of the ventilation valve, the opening degree of the ventilation valve is controlled, and the ventilation air volume is determined. According to the coal mine underground ventilation control method and device, the electronic equipment and the storage medium, the ventilation quantity can be accurately and timely adjusted.

The application provides a kiln ventilation regulation device, comprising: a ventilation pipe; a protection shell is fixedly installed on the surface of the ventilation pipe, a connecting shell is fixedly installed on one side of the protection shell, a supporting plate is fixedly installed in the inner cavity of the ventilation pipe, a supporting rod is fixedly installed on the top of the supporting plate, and a supporting disc is fixedly installed on the top of the supporting rod. Through the design of the regulation assembly, the regulation assembly adopts a worm, a worm wheel, a rotating gear and an adjusting disc transmission structure, worm and worm wheel transmission improves stability, the rotating gear and the teeth can realize precise adjustment of the angle of the adjusting fan blade, the ventilation volume control error is reduced, the precision is improved compared with traditional manual adjustment, multiple adjusting fan blades are linked through adjusting rods and adjusting discs, the ventilation pipe inner cavity ventilation cross-sectional area can be changed synchronously, the airflow deflection problem of traditional single baffle adjustment is avoided, the kiln working condition rapid change demand is adapted, a sealing strip is arranged on the top of the adjusting fan blade, and heat loss caused by traditional baffle gap air leakage is avoided.

The utility model provides an energy-saving building window body with an adjustable ventilation channel, and relates to the technical field of building window bodies. The energy-saving building window with the adjustable ventilation channel comprises a window body and further comprises a ventilation groove, the ventilation groove is formed in the window body, a plurality of wind shields are rotationally installed in the ventilation groove, a movable groove is formed in the window body and located below the ventilation groove, a plurality of worm wheels are rotationally installed in the movable groove, and the worm wheels are rotationally installed in the movable groove. The top ends of the multiple worm wheels penetrate through the top of the movable groove and are coaxially connected with the multiple wind shields correspondingly, and worms are installed on the sides, located in the movable groove, of the multiple worm wheels in a meshed mode. The driving assembly is located in the window body and used for driving the worms to rotate; the ventilation quantity and the wind direction of the ventilation groove can be conveniently adjusted by a person, operation is easy and rapid, use by the person is facilitated, ventilation can be guaranteed while sunshade is achieved, and the person can conveniently store the sunshade curtain.

The utility model discloses a balcony guardrail, which relates to the technical field of house building, and comprises a vertical rod, a cross rod, a first punching plate and a second punching plate, the vertical rod is slidably installed on the cross rod, the first punching plate is connected with the cross rod, a first ventilation position is formed on the first punching plate, the second punching plate is connected with the vertical rod, and the second ventilation position is formed on the second punching plate. The first punching plate and the second punching plate are arranged in parallel, a second ventilation position is formed on the second punching plate, and the first ventilation position and the second ventilation position are arranged in a staggered mode. According to the balcony guardrail, the first punching plate and the second punching plate are arranged to achieve safety protection, meanwhile, the first ventilation position and the second ventilation position are formed in the first punching plate and the second punching plate respectively, and the ventilation quantity is adjusted by adjusting the overlapped and aligned area of the first ventilation position and the second ventilation position; therefore, the balcony guardrail can simultaneously realize safety protection and indoor ventilation.

The application discloses a layout design method and device for a ventilation pressure regulating facility of an underground water storage cavern, and the method comprises the following steps: determining layout parameters of a tunnel group of the water storage cavern; constructing a water power simulation model of the water storage cavern composed of the tunnel group based on a one-dimensional water flow motion control equation; solving a distribution of a water hydraulic characteristic value along a path under a non-constant flow condition according to the water power simulation model, determining a space-time distribution of a tunnel section in a pressurized state and a non-pressurized state, judging a required ventilation amount according to the space-time distribution, and initially drafting a layout scheme of a cavern ventilation pressure regulation; adjusting the layout parameters, checking and analyzing whether the layout scheme of the ventilation pressure regulating facility is reasonable under the non-constant flow operation condition, and correcting the layout parameters of the water power simulation model established based on the one-dimensional water flow motion control equation according to a calculation result; and repeating the steps of adjusting, checking and correcting until a reasonable layout scheme of the ventilation pressure regulating facility is constructed.

This invention discloses an adaptive cross-section flexible ventilation duct and method. Currently, ventilation ducts used in tunnel construction are mostly in regular geometric cross-sections such as circles and rectangles. This invention, located within a ventilation duct area on one side of the tunnel roof, includes a flexible duct. The cross-section of the flexible duct is a closed area formed by its lower, right, and upper boundaries. Airbags are provided on the outer surfaces of the lower and right boundaries. Each airbag includes multiple spaced longitudinal and transverse airbags. The longitudinal airbags are positioned along the tunnel length, and the transverse airbags are perpendicular to the longitudinal airbags. The two ends of each transverse airbag are connected to two adjacent longitudinal airbags. This invention employs an adaptive shape structure. During ventilation, the boundary of the flexible duct coincides with the area where the duct can be installed, maximizing space utilization, creating a larger ventilation area, thereby achieving a larger ventilation volume, and ultimately achieving a longer ventilation distance than circular ventilation ducts.

The invention provides an optimization method and system for a marine engine room ventilation system, and relates to the technical field of analogue simulation, and the method comprises the steps: constructing a ventilation system simulation model of a marine engine room; according to the structure information and the working condition information of the ventilation system simulation model, determining the total heat dissipating capacity of the equipment; determining a reference ventilation quantity and a ventilation quantity area distribution table according to the total heat dissipation quantity of the equipment; setting the reference ventilation quantity and the ventilation quantity area distribution table into a ventilation system simulation model; performing fluid dynamic simulation on the ventilation system simulation model to generate a problem list; the optimal ventilation system structure parameters are optimized and determined through a swarm intelligence algorithm by taking weakening of hot spots, reduction of dead corner volume fraction reduction and weakening of a backflow path as targets. Hot spot areas in the cabin can be effectively weakened, the volume fraction of ventilation dead corners is reduced, the short-circuit backflow phenomenon is weakened, and the overall energy efficiency and design reliability of a ventilation system are remarkably improved while safe operation of equipment is guaranteed.

This invention discloses an intelligent ventilation and control system for hazardous waste containers, relating to the fields of ventilation systems and control technology. It aims to solve the technical problems of traditional hazardous waste container ventilation systems, such as low ventilation efficiency, high energy consumption, inability to dynamically adjust ventilation volume according to the hazardous waste status, and the tendency to lead to the accumulation of harmful gases or resource waste. The system includes: a container monitoring module, located inside and outside the container, for collecting environmental parameters; an intelligent ventilation execution module, used to coordinate with the ventilation and natural ventilation openings to adjust the ventilation state inside the container; a linkage control center, used to process monitoring data and generate control commands; and an energy supply unit, providing power to all modules of the system. This invention, through a dynamic strategy of "natural ventilation priority + mechanical ventilation assistance," accurately matches the ventilation needs of different hazardous wastes, solving the core problem of existing systems' inability to dynamically adjust according to the characteristics of hazardous waste and the real-time environment.

The blade angle adjustable ventilation device comprises a ventilation frame, positioning plates are vertically installed on the two sides of the ventilation frame, a supporting plate is fixedly installed on the upper portion of an inner cavity of the ventilation frame, blades are transversely installed below the supporting plate at equal intervals, a supporting shaft is fixedly installed at the center of the top of each blade, and the supporting shaft is fixedly installed on the lower portion of the inner cavity of the ventilation frame. The upper end of the supporting shaft penetrates through the supporting plate and extends to the position above the supporting plate to be fixedly provided with a gear, a gear ring is installed outside the gear in a meshed mode, and an adjusting block is fixedly installed in the middle of the front face of the gear ring. The angle of the blades can be conveniently and quickly adjusted by rotating the adjusting rotating disc, so that the ventilation quantity and the ventilation direction are flexibly controlled according to actual requirements, the practicability and the applicability of the ventilation device are greatly improved, the adjusting rotating disc with the adjusted angle can be locked and fixed through the arrangement of a locking rod and an annular fixing groove, and the practicability is high. The threaded rod is prevented from rotating under the influence of external force, and the ventilation effect stability is ensured.

The utility model discloses a refrigeration house ventilation device, which relates to the technical field of refrigeration house ventilation, and comprises a ventilation pipeline and a treatment box, the inside of the treatment box is rotatably connected with a filter plate, the inside of the filter plate is provided with a filter screen, and the inside of the treatment box is rotatably connected with a baffle on one side of the filter plate. Two self-locking motors are installed on one side of the treatment box, and the output ends of the two self-locking motors are fixedly connected with the filter plate and the baffle correspondingly. Compared with the prior art, the ventilation device has the advantages that the ventilation quantity can be conveniently adjusted through the rotary filter plate and the baffle mounted in the treatment box, meanwhile, water flow can be sprayed to the filter plate and the baffle under the action of the water pump and the spray head, the filter plate and the baffle can be conveniently and comprehensively washed in cooperation with rotation of the filter plate and the baffle, and the ventilation efficiency of the refrigeration house is improved. And dust and dirt attached to the upper surface are cleaned away, air pollution is prevented from being aggravated, manual cleaning of the filter plate and the baffle is replaced, and manpower is saved.

The invention belongs to the technical field of medical equipment, and particularly relates to intelligent anesthesia equipment capable of automatically regulating and controlling the anesthesia depth and a using method thereof.The intelligent anesthesia equipment comprises an anesthesia machine, and an evaporator and a gas mixing pipe are arranged in the anesthesia machine; the conveying part comprises an anesthesia pipe, the anesthesia pipe is communicated with a flow dividing pipe, the flow dividing pipe is communicated with a C-shaped pipe set, a ventilation pipe, a gas mixing pipe and a gas feeding pipe, and light blades are arranged in the gas feeding pipe; the monitoring part is arranged in the anesthesia machine; the adjusting part comprises a lifting rod, the lifting rod is connected with a blocking ring and a rotating ring, a lead screw and a sleeve rod are connected into the lifting rod, and a gear B is arranged on the sleeve rod; the driving part comprises a lifting frame, a limiting groove and a gear C are arranged on the lifting frame, the lead screw is connected with a gear D, and the loop bar is connected with a gear E. The system can monitor the minute ventilation volume of a patient in real time, judge the state of the patient according to the monitored data, adjust the concentration of anesthetic gas according to the state of the patient, and prevent the patient from being hurt by too deep or too shallow anesthesia.

The application discloses a kind of painting workshop environment quality prediction method and prediction model establishment method, the present application selects volatile organic compound concentration as painting workshop environment quality reference index, selects volatile organic compound concentration as dependent variable, spraying time, spraying distance, air flow rate as independent variable, establishes the multiple linear regression model of painting workshop environment quality, establishes neural network model, the fitting value of multiple regression model is used as the input of neural network model together with independent variable, constructs multiple linear regression-neural network combination model, according to painting working condition, the air quality in workshop is predicted using combination model, when volatile organic compound concentration in painting workshop reaches certain threshold value, it is necessary to carry out alarm and forced ventilation.The present application can accurately and quickly calculate volatile organic compound concentration in workshop by painting workshop environment quality prediction model, so as to adjust ventilation volume in time, protect construction personnel, save energy consumption.

The present disclosure provides a smoke exhaust system, a monitoring method, device, equipment and program product of the smoke exhaust system, the smoke exhaust system comprising: an extractor hood, an auxiliary fan and a camera; an air inlet of the auxiliary fan is communicated with an air outlet of the extractor hood through an exhaust duct; a front connecting section and a rear connecting section of a shell of the auxiliary fan are transparent; the camera is arranged below the auxiliary fan and is used for shooting images of the front connecting section and the rear connecting section to monitor oil stains attached to a wall surface. The present disclosure monitors the oil stains attached to the wall surface on the front connecting section and the rear connecting section of the auxiliary fan through the camera, calculates a wind capacity based on a change amount of the oil stains before and after a preset time period, evaluates a cleanliness according to the wind capacity, the larger the wind capacity is, the better the cleanliness is, the smaller the wind capacity is, the worse the cleanliness is, and the condition (such as a ventilation volume, the cleanliness, etc.) of the smoke exhaust system can be automatically monitored to determine whether cleaning needs to be immediately performed and to predict a remaining cleaning time to the next cleaning.

The invention discloses a plateau altitude self-adaptive compensation system and method for an emergency breathing machine. The plateau altitude self-adaptive compensation system comprises a sensing module, a control module, a power module, a gas circuit driving circuit, a man-machine interaction module, an execution module and an additional function module. Acquiring a plateau altitude self-adaptive compensation data set; the plateau altitude adaptive compensation data set comprises altitude height information, fan parameter information, atmospheric pressure information, airway pressure information, gas flow information and temperature information; training a preset fan drive control model by using the plateau altitude self-adaptive compensation data set to obtain an optimized fan drive control model; and processing plateau altitude self-adaptive compensation data to be processed by utilizing the optimized fan drive control model to realize plateau altitude self-adaptive compensation of the emergency breathing machine. The method can adapt to different altitudes and automatically compensate the influence of atmospheric pressure change on tidal volume and minute ventilation output precision.

The invention discloses a control method, a control system, a control device and a medium for a cooling triangular shutter, and relates to the technical field of indirect air cooling. The current flow speed, detected by a water flow sensor in a cooling triangle, of circulating water in each pipe bundle and the current temperature, detected by a temperature sensor, of the circulating water in each pipe bundle are obtained; obtaining heat dissipation efficiency influence factor data of the cooling triangle; if the current flow speed is lower than the flow speed threshold value and / or the current temperature is lower than the temperature threshold value, the opening coefficient of the cooling triangular louver is calculated according to the current flow speed, the current temperature and the heat dissipation efficiency influence factor data; the target opening degree of the cooling triangular louver is determined according to the opening degree coefficient, and the opening degree of the louver is reduced to the target opening degree in the next control period; therefore, when the current flow speed and / or the current temperature are / is low, the opening degree of the shutter can be actively reduced, the ventilation quantity is reduced, heat loss is reduced, circulating water is effectively prevented from freezing, and reliable anti-freezing protection of the cooling triangle is achieved.

This utility model relates to the field of mine ventilation equipment technology, specifically to an improved adjustable filter window for mine ventilation safety. It includes a duct body and an adjustment connection unit. The adjustment connection unit includes multiple fan blades, multiple connecting shafts, multiple connecting plates, a movable frame, a track plate, a drive component, a filter assembly, and an installation assembly. In use, the duct body is inserted into the mine's air intake pipe and fixed using the installation assembly. To increase the airflow of the duct body, the drive component is activated, causing the movable frame to move backward within the track plate. During this process, the movable frame, in conjunction with the strip groove, pulls the connecting plate to rotate, causing the fan blades below the connecting shaft to open, increasing the airflow intake area. To reduce the airflow of the duct body, simply move the movable frame in the opposite direction, closing the fan blades and reducing the airflow intake area. This method allows workers to flexibly adjust the ventilation volume according to actual ventilation needs, effectively improving ease of use.

The utility model discloses a high -efficient heat dissipation type intelligent low -voltage complete switchgear, including the cabinet body and the base of installing at the bottom of cabinet body, be equipped with heat abstractor in the cabinet body upper end, and the cabinet body upper end is equipped with ventilation mechanism, and heat abstractor includes fixed frame, drive motor, drive shaft, swing frame, rotation axis, a plurality of heat dissipation fan blade, a group of round bar, sliding block, push frame, transmission shaft and rotating rod, and ventilation mechanism includes ring cylinder, a plurality of pivot, a plurality of ventilation fan blade, a plurality of connecting plate, annular slide rail and rotating ring, the utility model has the advantages that through being equipped with heat abstractor in the cabinet body upper end, can swing reciprocating through push frame and push swing frame simultaneously when driving motor drives a plurality of heat dissipation fan blade to rotate heat dissipation, thereby makes a plurality of heat dissipation fan blade swing and blows, and the switchgear in the cabinet is more uniform in heat dissipation, and ventilation mechanism can be according to the temperature in the cabinet body, and the size of ventilation volume is automatically regulated through a plurality of ventilation fan blade, and convenient to use.

The utility model relates to the field of beehives, and discloses an isolation beehive capable of promoting bee breeding, which comprises a beehive main body, two air ports are fixedly connected to the outer side of the beehive main body, a plurality of vent holes are formed in the air ports, a fan is mounted on the inner wall of the air port on the left side, a bottom plate is fixedly connected to the inner wall of the beehive main body, and a plurality of air holes are formed in the bottom plate. An impurity removal drawer is fixedly connected to the outer side of the bottom plate, a plurality of supporting legs are fixedly connected to the bottom of the beehive body, a scraping assembly is arranged at the top of the bottom plate, and an adjusting assembly is arranged in the air opening. According to the bee ventilation device, the pull rod, the first spring, the clamping teeth, the gear, the adjusting disc, the through hole, the ventilation hole and other structures are matched with one another, the overlap ratio of the through hole and the ventilation hole in the adjusting disc is changed, and therefore the ventilation quantity can be accurately adjusted according to actual requirements, a stable and comfortable environment is provided for bee breeding, and healthy growth and breeding of bees are promoted.

The utility model provides a kind of air quality detection equipment for metal smelting environment evaluation, comprising: box;Driving assembly, the driving assembly includes drive motor, the drive motor is suspended in the box inside.The air quality detection equipment for metal smelting environment evaluation provided by the utility model is mutually matched by ventilation pipe, fan, first gas pipe, second gas pipe, shunt component, driving assembly and filter component etc. structure, when using, left and right sides ventilation hood alternate work, cooperate filter screen, both can continuously collect air sample to detect, and when ventilation hood switches working state, utilize airflow to carry out automatic cleaning to filter screen, avoid the problem that filter screen is jammed due to dust accumulation and influence ventilation volume and detection accuracy, improve the detection accuracy of detection equipment;And this automatic cleaning filter screen design reduces the working frequency that staff regularly cleans filter screen, reduces the labor intensity and maintenance cost of staff.

The invention discloses a railway vehicle ventilation adjusting method based on an emergency inverter, which comprises the following steps: S1, starting the emergency inverter, and carrying out logic diagnosis on switch states by a low-temperature switch, a medium-temperature switch and a high-temperature switch according to a step-by-step closing mode; s2, a low-temperature switch, a medium-temperature switch and a high-temperature switch detect the environment temperature in real time; s3, the output frequency and voltage of the emergency inverter are automatically adjusted according to the environment temperature, the low-temperature switch, the medium-temperature switch and the high-temperature switch are switched on step by step when the environment temperature rises, and the high-temperature switch, the medium-temperature switch and the low-temperature switch are switched off step by step when the environment temperature drops. The emergency inverter controls the output and ventilation quantity of the ventilator according to the environment temperature change, and energy is saved as much as possible on the premise that the good ventilation effect is achieved. A railway vehicle ventilation adjusting system based on an emergency inverter comprises the emergency inverter, and the emergency inverter is connected with a low-temperature switch, a medium-temperature switch, a high-temperature switch and a ventilator. According to the railway vehicle ventilation adjusting method and system based on the emergency inverter, the temperature switch is associated with the emergency inverter, intelligent speed control over the emergency inverter can be achieved according to the environment temperature, automatic adjustment of the ventilation quantity is achieved, and irrationality and misoperation influences caused by manual speed adjustment are reduced.

The utility model relates to the technical field of thread grease gas volume measurement, in particular to a thread grease gas volume measurement device, which is provided with a limiting mechanism and a one-way mechanism, so that in the thread grease gas volume measurement process, a material structure can be fixed, the deviation of the material structure is reduced, and the measurement inaccuracy of the ventilation volume is prevented; comprising a sealing mechanism; the limiting mechanism is installed at the upper end of the sealing mechanism, the one-way mechanism is installed at the lower end of the sealing mechanism, the display mechanism is installed at the lower end of the one-way mechanism, and the air pumping mechanism is installed at the rear end of the sealing mechanism; the sealing mechanism is used for sealing, the limiting mechanism is used for limiting, the one-way mechanism is used for one-way ventilation, the display mechanism is used for displaying the ventilation volume, and the air pumping mechanism is used for supplying air.

The application provides a natural ventilator and a rail vehicle, comprising a wind guide cylinder, an outer cover and an inner cover; the wind guide cylinder is sealingly connected to a connecting flange arranged around a roof exhaust hole; the outer cover is arranged around the periphery of the wind guide cylinder and connected to the wind guide cylinder or / and the roof, the bottom end of the outer cover is open and a first ventilation gap is formed between the outer cover and the roof, the center of the top wall of the outer cover is provided with a wind hole aligned with the wind guide cylinder; the inner cover is arranged above the wind guide cylinder and connected to the wind guide cylinder or / and the outer cover, the circumferential edge of the inner cover extends into the outer cover at the wind hole and extends to the periphery of the top end of the wind guide cylinder, a second ventilation gap is formed between the inner cover and the outer cover, and a third ventilation gap is formed between the inner cover and the top end of the wind guide cylinder. The natural ventilator and the rail vehicle provided by the application have two ventilation paths to naturally ventilate air to the outside, so that the ventilation volume can be doubled, the structure is more reliable and durable, vibration and noise can be avoided, and the riding experience is improved.

The invention relates to the technical field of high-frequency ventilation methods, in particular to a high-frequency ventilation method and system for preventing lung injury, comprising: acquiring historical control parameters of a high-frequency ventilator during anesthesia within a preset time period; real-time ventilation information is obtained, and correlation evaluation is conducted on the standardized historical control parameters and the real-time ventilation information; accumulating the real-time ventilatory capacity data in a time dimension, comparing the real-time ventilatory capacity data with a preset total ventilatory capacity requirement during anesthesia, and determining a standard grade based on a comparison difference; a first control strategy, a second control strategy and a third control strategy are generated according to the standard grade, and control parameters of the high-frequency breathing machine are optimized; and performing real-time driving control on the high-frequency breathing machine based on the optimized control parameter group. The problem of risks of volume injury, pressure injury and the like in the prior art is solved, the amplitude, the frequency, the average airway pressure and the inhaled oxygen concentration are dynamically optimized in the whole anesthesia process, and the total lung stretching amount is always kept within a safe range.

The invention belongs to the technical field of aerodynamic test equipment, and discloses an opening and closing device for ventilation and heat dissipation, and the opening and closing device is installed at the downstream of a core test area of the equipment. The ventilation door body is hinged and fixed to the door frame through a door body hinge, and the fixed door frame is fixed to an equipment backflow section wall plate. The output end of the driving system rod body is hinged and fixed to the ventilation valve body through a swing hinge, the fixed end of the driving system rod body is hinged and fixed to the fixing support through an installation hinged support, and the fixing support is fixed to an equipment wall plate. The opening and closing device controls the air exchange amount through continuous opening degree change to achieve air exchange heat dissipation and temperature regulation and control of the low-speed aerodynamic test equipment, and meanwhile cold air and hot air are fully mixed at the downstream of a core test area of the equipment, so that it is guaranteed that the uniformity of a core test airflow temperature field is prevented from being affected while airflow heat dissipation is guaranteed. The opening and closing device for ventilation and heat dissipation is simple in structure, safe, reliable and low in manufacturing cost and has engineering practical value.

The application discloses a ducted air conditioner, which aims to improve the ventilation volume of the ducted air conditioner. The shell of the ducted air conditioner has a mounting cavity and a return air inlet, and fan assemblies and indoor heat exchangers are located in the mounting cavity and are spaced apart along a first linear direction. The fan assemblies are centrifugal fans and are used to drive air to enter the mounting cavity from the return air inlet and flow through the indoor heat exchangers. An electrical box is located in the mounting cavity and is used to control the rotation of the fan assemblies. The first linear direction is perpendicular to the axial direction of the fan assemblies, and the electrical box is arranged along the axial direction of the fan assemblies and close to one side wall of the mounting cavity. Along the axial direction of the fan assemblies, the width dimension of the mounting cavity is greater than or equal to the sum of the width dimension of the return air inlet and the thickness dimension of the electrical box, and the ratio X1 of the thickness dimension of the electrical box to the width dimension of the return air inlet is in the range of 0.1≤X1<0.12 or 0.12≤X1≤0.18. The air conditioner provided by the application is used to improve the heat exchange efficiency of the indoor unit.

The application discloses a ventilation volume adjusting device and a use method thereof, which comprises an equipment assembly, a pipeline and an auxiliary mechanism, the equipment assembly is sleeved and assembled on the outer wall of the upper side of the pipeline, a motor is assembled in the equipment assembly, a central shaft is radially penetrated in the pipeline, a regulating plate is assembled on the side wall of the central shaft, a wind speed sensor is assembled on the inner wall of the pipeline, two wind speed sensors are respectively located on the two sides of the regulating plate, and the use method for adjusting the air volume and replacing the motor is disclosed, the equipment assembly is designed, the rotating disc in the equipment assembly can drive the screw rod to rotate, the motor can be taken out after being driven by the rack, and vice versa, the motor can be conveniently put into use, the motor is arranged in the interior of the equipment by the method, the motor is protected, when the motor has a problem, the motor can be conveniently replaced and maintained, and the technical problem that the internal space of the equipment is small and the maintenance difficulty of the staff is increased is avoided.

The application relates to the technical field of foundation pit dust reduction, and discloses a municipal engineering foundation pit construction dust reduction device, which comprises a base plate, a gas cylinder is fixed at the top of the base plate, an output shaft of the gas cylinder is fixed with a guide rail table, a dust reduction assembly for shielding dust reduction is arranged on the guide rail table, two adjacent base plates are connected through air pipes in the length direction of the guide rail table, a flow guide pipe is fixed at the top of the air pipe, a motor is fixed at one end of the air pipe, and the output shaft of the motor penetrates through the air pipe. The municipal engineering foundation pit construction dust reduction device controls the lifting of the whole dust reduction assembly through the gas cylinder, so as to regulate and control the influence degree of external wind on the foundation pit. When the gas cylinder is ejected, the distance between the sky screen and the foundation pit is increased, ventilation is increased, when the gas cylinder is returned, the distance between the sky screen and the foundation pit is shortened, the ventilation volume is reduced, the pressure of external wind on dust in the foundation pit is reduced, the distance between the water mist and the return contact is shortened, and the dust reduction effect is improved.