39 results about "Respiratory zone" patented technology

The invention belongs to the technical field of sleep health monitoring, and particularly relates to an optimal area selection chest / abdomen respiration signal extraction method based on human body pressure distribution. The method comprises the steps that data signals of human body pressure distribution changing along with time during sleeping are collected; the collected original pressure data are preprocessed, and clear and accurate pressure distribution data are obtained; for the preprocessed data, based on calculation of parameters such as the frequency, the power and the signal-to-noise ratio of the chest and abdomen area, an optimal breathing area selection algorithm is used for calculating respective band-shaped areas, most suitable for breathing signal extraction, of the chest / abdomen area; for the selected area, respiratory waveforms are extracted through a pressure signal fusion method based on weighted summation, and thoracic / abdominal respiratory signal monitoring is achieved; the sleep breathing monitoring device can accurately monitor sleep breathing in the form of a non-contact mattress under the condition that sleep quality is not interfered, and has a wide clinical application prospect.

This invention discloses a mine ventilation control method, electronic equipment, and program product. The mine ventilation control method uses a built-in miniature sensor in the breathing mask to collect air quality parameters in the breathing zone of the breathing mask in real time, and simultaneously obtains the current location coordinates of the miner. The air quality parameters are used to calculate the real-time hazard level of the breathing zone by combining the corresponding safe thresholds for carbon monoxide concentration, fine particulate matter concentration, oxygen concentration, and the minimum safe wind speed when the particulate matter concentration exceeds the standard. When the preset hazard threshold is exceeded, the method generates and issues control commands for the rotation speed, damper angle, and / or airflow direction of the ventilation fans installed in the mine roadway, based on the miner's location coordinates, so as to minimize the hazard level in subsequent moments.

The invention relates to the technical field of medical monitoring, in particular to a newborn nursing table with image acquisition and transmission functions. A mechanical and optical characteristic sequential sequence of each area in a video is synchronously analyzed through a respiration monitoring system, the trajectory closure degree is calculated in a phase space so as to accurately recognize a neonatal respiration activity area, and differential video compression coding is performed on a respiration area and a background area according to the trajectory closure degree, so that on the premise that the transmission bandwidth is not increased, the transmission efficiency of the neonatal respiration activity area is improved. Weak breathing details are clearly restored at the remote monitoring end, and false apnea misjudgment is effectively avoided.

The utility model provides an antibacterial, mildew-proof and antiviral multifunctional mask which comprises a main frame, a visible area and a breathing area. The visible area and the breathing area are arranged on the main frame. The visible area is provided with a lens of which the edge is connected with the main frame; an antibacterial, mildew-proof and antiviral filter layer and a breathable grid layer are arranged in the breathing area in a stacked mode, and the breathable grid layer is arranged on the side close to the face of a wearer. The mask provided by the utility model not only can meet the multifunctional protection requirements of people on eyes, mouth and nose, but also has good antibacterial, mildew-proof and antiviral properties, has the characteristics of simple structure and suitability for daily life requirements, and is beneficial to large-scale popularization and application.

The application discloses a cold region pig house winter stratified energy-saving ventilation method and relates to the technical field of livestock breeding. In order to solve the ventilation problem of the prior art cold region pig house, the method comprises the following steps: according to the pig house space and pig growth stage, a ventilation system is laid out; real-time monitoring of pig house internal environment parameters is taken as a basis; a CFD simulation is used to optimize the air flow path, and then the operation parameters of the ventilation system are regulated; and according to the heat loss in the pig house, the operation of the ventilation system is assisted and optimized. The application provides a dynamic adjustable air supply mechanism based on the breathing height of pigs, through pig house top layer heat recovery and pig house internal air flow stratified interval ventilation, the heat energy loss is effectively reduced, more than 80% of fresh air is accurately delivered to the pig breathing area, invalid ventilation is avoided, the energy saving rate is more than 50%, the energy consumption is reduced, the air quality in the breathing area reaches more than 99% of the standard rate, and the growth environment and health level of the pigs are improved.

The invention discloses a mine ventilation control method, electronic equipment and a program product, and the method comprises the steps: collecting the air quality parameters of a breathing area of a breathing mask in real time through a built-in micro sensor of the breathing mask, and synchronously obtaining the coordinates of the current position of a miner; the real-time risk degree of the breathing area is calculated according to the air quality parameters, the corresponding safety threshold value of the carbon monoxide concentration, the safety threshold value of the fine particulate matter concentration, the safety threshold value of the oxygen concentration and the minimum safety wind speed when the particulate matter concentration exceeds the standard, and when the preset risk threshold value is exceeded, the position coordinates of miners are combined; and generating and issuing control instructions of the rotating speed, the air door angle and / or the flow guide direction of a ventilation fan arranged in the mine laneway, so that the control instructions are minimized at subsequent moments.

The present application relates to the technical field of medical monitoring, in particular to a neonatal nursing table with image acquisition and transmission functions. Through the respiratory monitoring system, the mechanical and optical characteristic time sequence of each region in the video is synchronously analyzed, the trajectory closure degree is calculated in the phase space to accurately identify the neonatal respiratory activity region, and differential video compression coding is implemented on the respiratory region and the background region according to the same, so that the weak respiratory details are clearly restored at the remote monitoring end without increasing the transmission bandwidth, and false respiratory pause misjudgment is effectively avoided.

The present application belongs to the technical field of animal room ventilation, and discloses an animal cage ventilation device, a ventilation system and a method for an animal room. The animal cage ventilation device comprises a supply air jet integrated in the side of the animal cage, an upper foldable metal plate and a lower foldable metal plate; the supply air jet is internally provided with two horizontal hole plates, and the internal space is divided into three cavities. One side of the upper cavity is connected with an air inlet hose, and communicates with the upper foldable metal plate; the lower cavity is connected with the lower foldable metal plate. The upper cavity is further provided with a vertical hole plate, and is subdivided into two cavities. The contaminated gas generated by the animal cage and the lower manure tank is discharged through the exhaust short pipe on the side of the manure tank and the exhaust hose, and the inner side of the device is provided with an air outlet hole plate. The supply air jet is flexibly installed on the side wall of the animal cage through a sliding mechanism. The present application can adapt to different sizes of experimental animals, supply air to the breathing area to improve air quality, and can also reduce the air volume and load of the air conditioning system of the animal room, thereby solving the problem of high energy consumption.

The invention relates to a fully mechanized coal mining face global dust concentration real-time sensing and traceability analysis system and method, and belongs to the technical field of coal mine safety monitoring. The method comprises the following steps: constructing a dust concentration sensor network: based on data monitored by dust concentration sensors, combining a dust diffusion and migration rule obtained by numerical simulation and a relationship between dust concentration sensor distribution density and monitoring precision obtained by a field test, determining mounting positions and spacing of the dust concentration sensors; according to the real-time concentration monitored by the sensor, the coal mining machine power, the hydraulic support top plate pressure and the air flow speed, a multi-source data fusion model is adopted to obtain a dust thermodynamic diagram mapping function; and the visual display system is used for integrating an underground GIS map, displaying the dust concentration of the respiratory zone in a thermodynamic diagram overlapping manner, and triggering early warning in an over-limit region. According to the invention, dust concentration distribution dynamic reconstruction and respiratory zone dust traceability under the action of multi-dust-source coupling are realized.

The invention relates to the technical field of underground cooling appliances, in particular to a portable cooling device and method for a high-temperature and high-humidity environment, the portable cooling device comprises a main structural part and a breathing mask, and the breathing mask is attached to the face; the main structural part comprises a shell, a refrigerant bin used for storing a refrigerant is arranged in the shell, and the refrigerant bin cools the breathing mask when the breathing mask inhales air; the device adopts a physical phase change cooling principle and does not need to be driven by an external power supply; by accurately regulating and controlling the temperature and humidity environment of the breathing area, the heat stress response of the human body is effectively relieved, and the risk of airway mucosa hyperemia and edema is reduced. The device is light and portable in structure, and is provided with a special thermal insulation layer and a bearing system without influencing the flexibility of underground operation. According to the scheme, installation is easy and convenient, the maintenance cost is low, complex engineering investment is not needed, a safe, economical and efficient dehumidification and cooling solution is provided for deep well high-temperature and high-humidity environment operation, and important practical value and wide application prospects are achieved.

The present invention belongs to the technical field of ventilation and air conditioning, and specifically relates to an air supply component for the breathing zone of a refuge chamber, wherein the air supply component includes an upper static pressure box and a plurality of air outlet boxes connected to the bottom of the static pressure box and arranged in parallel with each other; the air outlet box is a semicircular cylinder, the flat side of the semicircular cylinder is connected to the static pressure box, and slit air outlets are provided on the arc surface of the semicircular cylinder; there are three groups of slit air outlets, forming six slit air outlets, which are symmetrical about the center line of the arc surface, and the first air supply outlet, the second air supply outlet and the third air supply outlet are distributed in sequence from top to bottom on one side of the arc surface; the arc lengths of the first air supply outlet, the second air supply outlet and the third air supply outlet decrease in sequence. Under the same air supply volume, the air supply speed of the air supply component of the present invention is lower than the air supply speed of the traditional mixed air outlet, which can ensure that the air supply airflow is delivered to the designated area and ensure the comfort of the personnel; when the air supply component of the present invention is used to supply air, the wind speed distribution in the entire refuge chamber is relatively uniform, and the wind speed is moderate.

The application provides an attached diffusion oxygen supply equipment and method for highland areas, which comprises an oxygen supply device and a diffusion oxygen supply device, wherein the oxygen supply device and the diffusion oxygen supply device are connected through an oxygen supply pipeline; the diffusion oxygen supply device is arranged on a wall close to the upper side of a rest area and close to a human head; an air outlet is arranged on the diffusion oxygen supply device close to the area of the human head in the rest area, and one side of the air outlet is connected with the wall; when the oxygen supply device is opened, oxygen is sent to the air outlet of the diffusion oxygen supply device through the oxygen supply pipeline to form a jet flow; the jet flow is sent out from the air outlet and moves forward along the vertical wall surface, the main body of the jet flow flows vertically downward along the wall surface, impacts the ground and changes into a horizontal diffusion flow after passing through the breathing area of the human head, and indoor diffusion oxygen supply is completed; the application has the advantages of simple structure, low energy consumption and the ability to quickly and efficiently improve the oxygen concentration in the space.

The invention provides an antibacterial, mildew-proof and antiviral multifunctional mask. The mask comprises a main frame, a visible area and a breathing area, wherein the visible area and the breathing area are arranged on the main frame; the visible area is provided with a lens of which the edge is connected with the main frame; an antibacterial, mildew-proof and antiviral filter layer and a breathable grid layer are arranged in the breathing area in a stacked mode, and the breathable grid layer is arranged on the side close to the face of a wearer. The mask provided by the invention not only can meet the multifunctional protection requirements of people on eyes, mouth and nose, but also has good antibacterial, mildew-proof and antiviral properties, has the characteristics of simple structure and suitability for daily life requirements, and is beneficial to large-scale popularization and application.

The utility model discloses a mask with a folding breathable layer, and belongs to the technical field of masks. At least one folding part which does not extend transversely is arranged in the breathable area of the mask body, and the folding part is a folding breathable filter layer. In the using process, the area of the breathable area of the mask body can be increased by unfolding the folding part, so that the filtering effect is improved, more exhaled air can be contained and buffered, the air is effectively prevented from overflowing from the upper end of the nose and the jaw, and the filtering effect is further improved. The non-transversely-extending folding part can support the breathing cavity formed by the whole mask body in certain strength, the breathing cavity is prevented from contracting and expanding in the breathing process, and therefore the air leakage condition is avoided.

The invention relates to the technical field of building environments, in particular to a low-energy-consumption non-contact targeted oxygen supply system which comprises an oxygen supply device body, a static pressure box, an oxygen supply hose, a fan, a personalized oxygen supply terminal and an oxygen detection device used for sampling oxygen concentration in a sampling area. The personalized oxygen supply terminal comprises a plurality of air outlet pipes, and the air outlet pipes have adjustable oxygen supply parameters; the system further comprises a joint optimization module which is used for carrying out iterative optimization on the oxygen supply concentration and the oxygen supply parameters according to a Kriging-multi-island genetic algorithm to obtain an optimal oxygen supply parameter combination so as to realize optimal oxygen supply. According to the method, through combined optimization of side type multi-angle jet flow, local encryption grid CFD analysis and the Kriging-multi-island genetic algorithm, the problems that in the prior art, oxygen conveying energy consumption is large, the oxygen supply effect is poor, and testing means are lacked are solved, accurate oxygen supply only for the breathing area is achieved, energy consumption is remarkably reduced, and comfort and safety are improved.

This invention discloses a respiratory monitoring method, medium, device, and system based on ultra-wideband radio frequency signals. It acquires signal data returned by IR-UWB radar; performs FFT on the signal in each interval and multiplies the spectra of three adjacent intervals, using the maximum coefficient within the corresponding frequency range as a metric to locate the interval in which the human is breathing; applies a similarity transformation method to the signal within the human breathing interval to eliminate background noise; compensates for phase shifts caused by the monitored person's position and orientation, and normalizes the signal amplitude to eliminate the influence of irrelevant factors such as the monitored person's position and orientation; further feeds the amplitude, I-component, and Q-component of the signal in two breathing intervals into a trained encoder-decoder neural network, outputting a respiratory waveform through the encoder-decoder neural network, thus achieving non-contact monitoring of human respiration, which can be widely applied in the medical field.

The utility model discloses a kind of exhaust cabinets specially used for organic solvent cleaning, relate to exhaust hood technical field.Patent includes base, the base is used to provide supporting action;One side outer surface of the cover body abuts against wall body;The exhaust port is located in the top surface of cover body, for connecting cover body and exhaust pipe;The exhaust pipe is arranged at the top end of cover body, for connecting exhaust port and waste gas processor;The waste gas processor is used to handle gaseous organic toxicant that exhaust cabinet captures and discharges, connects exhaust pipe and fan;The fan is used to provide power.The exhaust cabinet specially used for organic solvent cleaning improves the efficiency of cover body to capture organic toxicant in air, ensures that airflow organization is smooth, gaseous organic toxicant that is diffused into air when cleaning object does not pass through the respiratory zone of worker, protects the health of worker.

The invention relates to an intelligent control system for radon concentration in coal mine underground air, which belongs to the technical field of coal mine occupational health hazard prevention and control, and comprises a plurality of radon concentration sensors arranged in different areas, an air pressure and air quantity sensor, a monitoring substation, a ground monitoring module, a mine local ventilator, a mine main ventilator, an air door and an air window, the plurality of radon concentration sensors are arranged at the height of a main roadway entrance and exit breathing zone, monitor the radon concentration data in the roadway in real time and upload the data to the monitoring substation; the air pressure and air quantity sensor collects roadway ventilation parameters and uploads the parameters to the monitoring substation; the monitoring substation is connected with and controls a mine local ventilator, a mine main ventilator, an air door and an air window; the monitoring substation uploads acquired sensor data to the ground monitoring module through the switch and the industrial ring network; and the ground monitoring module is used for resolving the radon concentration in real time and regulating and controlling the air volume.

Disclosed is a miniaturised wearable device for monitoring and detecting halogenated anaesthetic gases in a breathing zone of a user that includes a sealed gas detection chamber that comprises a gas inlet, and a gas outlet, and first and second transparent windows that face opposite to each other; a micro-vacuum pump connected to the gas outlet for creating a vacuum in the sealed gas detection chamber, thereby causing a flow of ambient gas in the sealed gas detection chamber, through the gas inlet; and an IR emitter for emitting IR light into the sealed gas detection chamber through the first transparent window, and for enabling thermal stability and condensation prevention in the sealed gas detection chamber through PWM control. The sealed gas detection chamber includes an IR detector for receiving the IR light transmitted by the IR emitter source through the second transparent window, a moisture filter, an inertial measurement unit (IMU) for detecting user motion and activity, and a processing unit for detecting concentration of halogenated anaesthetic gas in the ambient gas based on the IR light received by the IR detector.

The invention discloses a high-altitude mine oxygenation circulating ventilation system and a using method thereof. The high-altitude mine oxygenation circulating ventilation system comprises a transverse rotational flow pre-dedusting device, a secondary dirty air purification device, an air flow control device, an oxygen-enriched fresh air generation device, an oxygen fresh air conveying device, a wireless receiving and control system and the like. Downhole dirty air is conveyed through the compressed air pipeline, large-particle-size dust and medium-particle-size dust are separated in a grading mode through the transverse rotational flow dust pre-removal device, small-particle-size dust and tiny dust are intercepted through the second-stage dirty air purification device, and nitric oxide and oxycarbide are adsorbed. The airflow control device monitors gas parameters in real time; a novel phase change temperature control material is coated on a main gas transmission pipeline, an oxygen storage device dynamically adjusts oxygen, and oxygen-enriched fresh air accurately covers an operation breathing area through an annular nozzle; and when the conventional air source is abnormal, the standby oxygen-enriched fresh air storage device supplies the air emergently. According to the invention, purification, oxygenation and temperature control are integrated, operation safety requirements are met, personnel health and operation continuity are guaranteed, energy consumption is optimized, and the device is adaptive to high-altitude complex working conditions.

This invention provides a method, device, terminal, and storage medium for detecting respiratory states, belonging to the field of intelligent detection technology. The method includes: acquiring a user's sleep monitoring video stream and dividing the sleep monitoring video stream into several sub-video streams according to a preset time interval; processing all frames in each sub-video stream to determine the user's chest and abdominal breathing region and breathing interference region, and extracting the motion intensity of the chest and abdominal breathing region and the motion intensity of the breathing interference region; marking the validity of the sub-video stream based on the motion intensity of the chest and abdominal breathing region and the motion intensity of the breathing interference region in each sub-video stream; and detecting the user's respiratory state based on the marked valid sub-video streams. This invention effectively removes interference from non-breathing movements by extracting and filtering sub-video streams based on the motion intensity of different regions, thereby improving the accuracy and reliability of user sleep breathing event detection.

The utility model relates to the technical field of diving devices, and discloses a diving eyeshade convenient to use, which comprises a frame, a lens body, a flexible lens skin, a breathing tube, a drainage assembly and an air inlet piece, the flexible mirror skin and the mirror body are embedded in the frame to form an intra-mirror space, the breathing tube is detachably arranged in the frame, and the breathing tube is communicated with the intra-mirror space and the external environment; the flexible mirror skin is attached to the face and provided with abutting parts which abut against and are limited to the two sides of the nose, and the space in the mirror is divided into an object viewing area and a breathing area through the abutting parts; air inlet holes are formed in the connecting positions of the bottom of the mirror body and the flexible mirror skin and communicated with the object viewing area and the breathing area, and air inlet pieces are arranged at the air inlet holes. The breathing tube is communicated with the visual area and the external environment, the breathing tube is further provided with a first air outlet channel communicated with the external environment, the flexible mirror skin is provided with second air outlet channels along the two sides of the mirror body respectively, and the second air outlet channels are communicated with the breathing area and the first air outlet channel respectively. A user can breathe through the nose by using the diving eyeshade, so that the use convenience of the diving eyeshade is improved.

The mask comprises a mask body and tying belts arranged on the two sides of the mask body in the length direction, the mask body comprises an outer mask layer and an inner mask layer which are sequentially arranged from outside to inside, and when the mask is in a wearing state, the inner mask layer is arranged on the side, close to a user, of the outer mask layer; the outer cover layer comprises a first upper part and a first lower part which are sequentially arranged from top to bottom, and the first upper part and the first lower part are connected in the area except the area corresponding to the breathing area of the user, so that a through hole corresponding to the breathing area is formed between the first upper part and the first lower part. The mask body comprises the outer mask layer and the inner mask layer which are sequentially arranged from outside to inside, the protection performance and the heat preservation performance of the mask are guaranteed, the through holes are formed in the outer mask layer and formed in the area corresponding to the breathing area of a user, the air permeability of the mask is guaranteed, and the mask is more comfortable to use. Therefore, the mask has the protection performance, the heat preservation performance and the air permeability.

The invention relates to the technical field of protective articles, in particular to an electric respirator, and aims to solve the problem that the filtering effect of a filtering box of an existing electric respirator is affected due to the fact that a vacuum area exists at the top of the filtering box. The electric respirator comprises a mask body, a filtering assembly and an air supply assembly, the mask body is provided with a breathing area, the filtering assembly is provided with an airflow channel, the airflow channel is filled with an adsorption material, and the air inlet end of the air supply assembly communicates with an air outlet; the air outlet end of the air supply assembly communicates with the breathing area and is used for conveying air flowing through the airflow channel to the breathing area, at least one part of the airflow channel extends in the first direction in the air flowing direction, and the first direction is parallel to the gravity direction of the adsorption material. The situation that pollution gas is directly exhausted from the gas outlet through a vacuum area due to the fact that the vacuum area exists at the top of the gas flow channel can be avoided, meanwhile, the air supply assembly is arranged, breathing resistance can be reduced, and the use experience of a user is improved.

The invention belongs to the technical field of animal house ventilation, and discloses an animal cage ventilation device, system and method for an animal house. The animal cage ventilation device comprises an air supply jet device, an upper foldable metal plate and a lower foldable metal plate which are integrated on the side face of an animal cage. Two horizontal pore plates are arranged in the air supply jet device and divide the internal space into three cavities. One side of the upper cavity is connected with an air inlet hose and is communicated with the upper foldable metal plate; and the lower cavity is connected with the lower foldable metal plate. A vertical pore plate is further arranged in the upper cavity, and the upper cavity is divided into two cavities. Polluted gas generated by the animal cage and the lower excrement groove is exhausted by an exhaust short pipe on the side face of the excrement groove through an exhaust hose, and an air outlet hole plate is installed on the inner side face of the device. The air supply jet device is flexibly installed on the side wall of the animal cage through a sliding mechanism. The device can adapt to experimental animals of different sizes, air is supplied to a breathing area to improve air quality, the air volume and load of an air conditioning system of the animal house can be reduced, and the problem of too high energy consumption is solved.

The present invention belongs to the technical field of oxygen supply equipment and relates to an attached type local oxygen supply system, which comprises an oxygen generator, a first static pressure box, an oxygen supply pipe and a terminal oxygen supply device connected in sequence; an air inlet and an oxygen inlet are arranged on the first static pressure box, and the oxygen inlet is connected to an outdoor oxygen generator; the terminal oxygen supply device comprises a box body, an air inlet is arranged at the top of the box body, the air inlet is connected to the first static pressure box through the oxygen supply pipe, a flow equalizing orifice plate is arranged in the upper part of the box body, a second static pressure box is arranged in the lower part, a slot air outlet is arranged at the bottom of the box body, and a deflector with an adjustable angle is connected to the position corresponding to the slot air outlet. The attached oxygen supply directly sends the oxygen-rich air flow along the wall surface and the deflector to the personnel breathing area, so that the local oxygen enrichment rate in the breathing area is rapidly increased, the excess oxygen amount diffuses along the ground to form an air lake, and gradually diffuses upward to increase the global oxygen enrichment rate; the deflector directly conveys the oxygen-rich air flow to the personnel breathing area, so that the oxygen enrichment rate in the whole space ranges from the target area to the whole, reducing the total oxygen supply amount.

A purification device of exercise environment is provided and includes a main body, a purification unit, a gas guider and a gas detection module. The main body has at least one gas inlet and at least one gas outlet. The purification unit, the gas guider and the gas detection module are disposed in the main body. The purification unit filters a gas in an exercise environment introduced through the at least one gas inlet. The gas guider operates continuously to transport the gas in the exercise environment to be introduced through the at least one gas inlet and to flow through the purification unit. The gas detection module detects a gas information and a particulate cleanliness of the air in the exercise environment, and the particulate cleanliness of the gas in the breathing region around the nose of the exerciser reaches 0˜20 μg / m3 accordingly.

The utility model relates to the technical field of diving devices, and discloses a diving mask fitting the face shape. The diving mask comprises a frame, a mirror body, a flexible mask body, a supporting body, a breathing tube and a head band. The breathing tube is detachably connected to the top of the frame, the flexible cover body and the mirror body are respectively embedded in the frame to form an intra-mirror space, and the head band is respectively connected to the frame and the flexible cover body; the flexible cover body is provided with abutting parts which abut against and are limited to the two sides of the nose, and the space in the mirror is divided into an object viewing area and a breathing area through the abutting parts. The side edge of the side, close to the face, of the flexible mask body is provided with a first attaching part and a second attaching part which are integrally formed, and the first attaching part and the second attaching part are used for being attached to the face and the lower jaw of a user respectively. The supporting body is detachably arranged in the breathing area, and the edge of the supporting body abuts against the edge of the inner side of the breathing area. The diving mask can better fit the faces of different users, so that the applicability of the diving mask and the diving safety of the users are improved.

The invention relates to a novel mask with a laser disinfection and sterilization function, which comprises a body and a first optical fiber embedded in the body, the upstream of the optical path of the first optical fiber is connected with a laser emitter, the laser emitter emits laser and is coupled into the first optical fiber, the first optical fiber comprises a first light leakage section arranged in the body in a bending manner, and the first light leakage section is connected with a second light leakage section. Laser leaks from the first light leakage section and covers the whole breathing area of the body, the laser disinfection and sterilization technology and the protection function of the mask are combined, compared with a traditional mask, the mask has the higher disinfection and sterilization efficiency and the wider application range, the influence of aging of a mask material layer on the disinfection effect is eliminated, and the service life of the mask is prolonged. The laser disinfection device can disinfect and sterilize the air for a long time, a more comprehensive and effective respiratory protection effect can be provided for a user, and the health risk caused by respiratory diseases is greatly reduced.

Ventilation masks that have breathing regions and inner and outer wearer-engaging seals and interseal regions between the inner and outer seals that are purged with either a vacuum or a positive pressure so as to prevent contaminated breathing gases from leaking into the environments surrounding the masks. In vacuum-purged embodiments, the pressure in the interseal region is lower than the pressures in both the breathing region and the surrounding environment. In some vacuum-purged embodiments, the vacuum is created using a vacuum ejector integrated into the mask. In pressure-purged embodiments, the pressure in the interseal region is greater than the pressures in both the breathing region and the surrounding environment. In some pressure-purged embodiments, the positive pressure is provided directly from a gas source, with a mask-integrated pressure reducer located between the gas source and the breathing region to reduce the pressure in the breathing region. Corresponding methods are also disclosed.