108 results about "Expiratory valve" patented technology

The present invention relates to the technical field of respiratory training equipment, and in particular to a respiratory training device, comprising a mouthpiece, a shell, an exhalation valve, and an inhalation valve, wherein the mouthpiece is connected to the shell and is provided with mutually connected airways inside; at least two concave cavities are provided on the outer wall of the shell, and vents are provided on the bottom wall of the concave cavity of the shell and the vents are connected with the airways, and a valve cover is provided on each concave cavity, and the valve cover is threadedly connected to the shell at the corresponding position of the concave cavity, and the valve cover is connected to the shell by rotating the thread to change the size of the area of ​​the concave cavity connected with the outside, and a one-way valve sheet is provided on the shell corresponding to the air vent, and the one-way valve sheet is used to limit the direction of the airflow through the vent. A respiratory training device obtained by the present invention realizes independent adjustment of the inhalation resistance and the exhalation resistance to enhance the strength and endurance of the expiratory muscles and the inspiratory muscles (diaphragm and intercostal muscles).

A set of designs for an electrically heated respirator / face mask to kill or deactivate airborne viruses and bacteria by creating a seamless thermal and / or humidity chamber / barrier around the wearer's nose and mouth area; in addition to efficiently filtering the tiny particles according to NIOSH N95 standards, it reduces the chance of contracting the disease. The designs include various combinations: a disposable or reusable N95 respirator with or without an exhalation valve, disposable or reusable medical face mask, both with or without integrated and replaceable filter layers, and a reusable respirator with filter cartridges. Each design comprises multiple layers with an active thermal filter with a heating element, which is made of graphene. The respirator is connected via a USB cable to a power unit. A control module is used to turn the device on and off and optionally control the inner temperature and humidity through sensors.

A filtering facepiece respirator is provided. The filtering facepiece respirator includes a facemask adapted to fit over the nose and mouth of a wearer, where the facemask comprises a mask body containing a filtering structure. A harness is coupled to the mask body for securing the facemask on the face of the wearer, and a mechanical valve is coupled to a portion of the mask body proximate the wearer's mouth. The valve may be adjusted between a first mode of operation and a second mode of operation, where in the first mode of operation is permitted to flow through the valve on exhalation but not on inhalation and in the second mode of operation air is obstructed from flowing through the valve on exhalation and inhalation. There is an optional third mode of operation where air is permitted to flow through the valve on inhalation and exhalation.

The utility model relates to a burning-resistant fire-retardant breather valve which comprises a valve body, a fire arrester connecting flange is fixedly connected to the top of the outer side wall of the valve body, a fire arrester is installed on the fire arrester connecting flange, a fixing plate is fixedly connected to the bottom wall of the valve body, and a guide cylinder is fixedly connected to the bottom wall of the fixing plate. A flange base is fixedly connected to the bottom wall of the guide cylinder, a supporting cylinder is fixedly connected to the upper wall of the fixing plate located in the valve body, an exhalation valve disc assembly is arranged on the upper wall of the supporting cylinder, an inhalation valve disc assembly is connected to the exhalation valve disc assembly, and a supporting column is fixedly connected to the inner wall of the guide cylinder. A valve rod fixedly penetrates through the middle of the supporting column. Compared with the prior art, the device has the advantages that the occupied space and the weight are greatly reduced, the cost is saved, and the pressure of the storage tank can be automatically adjusted when the pressure of the storage tank is too large or too small, so that the storage tank is prevented from being damaged.

The utility model relates to the technical field of rehabilitation medical treatment, and discloses a high-low oxygen training system which comprises an air compressor, a heat exchanger, a filtering device, an air separation device, an air storage bag and an exhalation valve assembly used for being connected with a breathing mask, and the air compressor, the heat exchanger, the filtering device, the air separation device, the air storage bag and the exhalation valve assembly are sequentially connected. The exhalation valve assembly is provided with an oxygen concentration sensor used for detecting the real-time oxygen concentration in the exhalation valve assembly, the oxygen concentration sensor is in signal connection with the flow control valve so as to send the measured real-time oxygen concentration to the flow control valve, and the flow control valve is used for adjusting the flow of oxygen and nitrogen entering the air storage bag. The flow control valve and the oxygen concentration sensor achieve closed-loop control, the flow of oxygen and the flow of nitrogen entering the gas storage bag can be adjusted according to the real-time oxygen concentration in the exhalation valve assembly, and therefore the oxygen concentration of gas in the gas storage bag is adjusted, namely the oxygen concentration of gas output by the exhalation valve assembly is adjusted. Accurate adjustment of low oxygen concentration and high oxygen concentration is achieved, and adaptability is higher.

The utility model belongs to the technical field of emergency rescue, and particularly relates to an air respirator mask and a system. The air respirator mask comprises a mask body and a transparent face mirror, a mouth and nose mask is arranged in an inner cavity of the mask body, an air circulation area is formed between the outer portion of the mouth and nose mask and the inner side of the face mirror, two air suction valve plates are symmetrically arranged on the mouth and nose mask, and a double-mouth breathing seat is arranged on the face mirror. The double-port breathing seat is provided with an inspiration valve connector and an exhalation valve connector, the inspiration valve connector is used for being connected with an air respirator air bottle and an air supply valve of the air respirator air bottle, and the inspiration valve connector is used for being connected with an exhalation valve seat which can be freely inserted and detached. By designing the double-port breathing seat and the exhalation valve seat capable of being freely inserted and detached, when gas in air exhalation is completely consumed, on the premise that an air respirator mask and an air supply valve of the air respirator mask are not detached, the exhalation valve seat is pulled out, and a chemical oxygen respirator is inserted into an exhalation valve interface, so that closed-loop type oxygen support can be provided for a wearer; and the respiratory protection time of rescuers is prolonged.

The invention discloses an electric turbine anaesthesia machine with an automatic air supply function of an air storage bag and a method, and the anaesthesia machine comprises a turbine which is used as an active inspiration air source; a detachable air storage bag; an air supply one-way valve; the breathing circuit is connected between the turbine outlet and the patient end and comprises an inspiration branch provided with a flow diaphragm, an expiration branch provided with an expiration EV valve and an expiration flow diaphragm, and a patient breathing circuit tank assembly containing the air storage bag and the soda lime tank; a plurality of sensors; the control unit is electrically connected with and controls the turbine and the expiration EV valve, receives signals of the sensor and is used for achieving different breathing ventilation modes. According to the anesthesia machine and method, turbine driving is adopted, the tidal volume adjusting range is wide, and physical limitation of a folding bag is avoided; the air storage bag is externally arranged and replaceable, so that cleaning and maintenance are facilitated; a one-way valve automatic gas supply mechanism ensures continuous and stable gas supply; the device supports various breathing modes, and is suitable for various scenes such as anesthesia maintenance, postoperative awakening, oxygen therapy and the like.

The utility model relates to the technical field of respirators, in particular to an outpatient respirator which comprises a mask, a breathing structure is arranged on the mask, the breathing structure comprises a connecting sleeve, the connecting sleeve is connected to the mask in an inserted mode, a connecting pipe is fixedly connected to the connecting sleeve, an exhalation valve is fixedly connected to the connecting pipe through a fixing structure, and the exhalation valve is fixedly connected to the mask. Four fixing strips are fixedly connected to the bottom end of the exhalation valve, a fixing ring is fixedly connected to the four fixing strips, a mounting ring is fixedly connected to the connecting pipe, four buckles are fixedly connected to the mounting ring, and the buckles are clamped with the fixing ring; the connecting pipe and the exhalation valve are rapidly fixed through the fixing structure, the connecting pipe is prevented from slipping off from the exhalation valve, and the medical auxiliary breathing effect is improved.

The invention belongs to the technical field of exhalation valves, and discloses an end-expiratory positive pressure exhalation valve which comprises a patch, an adjustable micro valve, a hole, a flow velocity sensor, a pressure sensor and a controller. An adjustable micro valve is arranged in the patch; a hole is formed in the adjustable micro valve; a controller is fixed at the left end of the adjustable micro valve; and a flow velocity sensor and a pressure sensor are fixed below the controller. The invention provides an airflow sensor and a controller, and when the airflow of a patient drops due to sleep apnea, the airflow sensor and the controller can automatically adjust, reduce the valve, increase the provided pressure and open the airway. When airflow is detected to be stable for a period of time, the valve is expanded, and the pressure is reduced to ensure comfort. The positive end-expiratory pressure device can provide adjustable and large positive end-expiratory pressure, and a treatment mode with high comfort and good compliance is provided for a patient.

Aspects and embodiments relate to a therapeutic gas delivery system coupling, a therapeutic gas delivery system including such a coupling, and a method of coupling components of a therapeutic gas delivery system using such a coupling. According to various, but not necessarily all, embodiments there is provided: a therapeutic gas delivery system coupling comprising: an inlet coupleable to a therapeutic gas supply; a delivery outlet configured for delivery of therapeutic gas to a subject; a waste outlet coupleable to a gas extraction system; the coupling comprising a body portion having: a main cavity located between the inlet and the delivery outlet; and an ancillary cavity, located between the main cavity and the waste outlet; wherein: the main cavity and ancillary cavity are linked via an exhalation valve, the exhalation valve being moveable between: a closed position if a pressure differential between the ancillary cavity and the main cavity is greater than or substantially equal to zero, and an open position if a pressure differential between the ancillary cavity and the main cavity is less than zero; and wherein the ancillary cavity further comprises a waste valve, the waste valve being moveable between: an open position if a pressure differential between the ancillary cavity and ambient pressure is less than zero, and a closed position if a pressure differential between the ancillary cavity and ambient pressure is greater than or equal to zero. Arrangements in accordance with described approaches may improve the capture efficiency of exhaled gas, for example, exhaled gas containing nitrous oxide, during and between periods of active administration of therapeutic gases.

The invention relates to a device for automatically pressing a breathing balloon. The device comprises a mask, an exhalation valve, an inhalation valve, the breathing balloon, a three-way pipe, a pulling piece strip and a main controller. The mask is fixed to the face of a patient through the tearing adhesive tape and used in cooperation with the exhalation valve and the inhalation valve to form a breathing loop. The exhalation valve and the inhalation valve are both connected with the three-way pipe, a detection chip is arranged in the three-way pipe, the ventilation capacity is detected through the air pressure and the flow speed, and data can be sent to the main controller through wireless radio frequency signals; the pulling sheet strip is wound outside the breathing balloon, a main controller is fixed at one end of the pulling sheet strip, a transmission gear is arranged at the bottom end of the main controller and connected with the pulling sheet strip, the three-way pipe is provided with an air inlet, an air outlet and a pressure tapping port, and the pressure tapping port is connected with a pressure sensor of the breathing balloon. Compared with the prior art, the pressing force can be accurately guaranteed, and the pressing ventilation capacity can be guaranteed; the universality is realized; and meanwhile, clinging and regular pressing of the mask are ensured.

An exhalation valve for a respiratory device comprises a valve housing (12) with a fluid line (20, 22) and with a valve diaphragm (14) held by a holding portion (42) of the valve housing (12), wherein the fluid line (20, 22) has a first line portion (20) with a valve seat (26) and a second line portion (22) which differs from the first line portion (20), a valve body (36) formed with the involvement of the valve diaphragm (14) rests on the valve seat (26) in a closed position of the diaphragm valve (10) and interrupts a flow path between the first line portion (20) and the second line portion (22), the valve body (36) of the valve diaphragm (14) can be lifted from the valve seat (26) along an extended imaginary virtual lifting path which serves as a virtual reference path (Z), and at least one region of the valve housing (12) is designed as a thermal deformation region (78, 80, 82, 84) made of a polymer which has a dimensional stability temperature of less than 115°C, measured according to ASTM D648 at a test load of 66 psi, and / or a dimensional stability temperature of less than 100°C, measured according to ASTM D648 at a test load of 264 psi, the thermal deformation region (78, 80, 82, 84) being a shell-shaped region with a wall thickness of less than 0.9 mm.

The utility model relates to the technical field of semiconductor manufacturing, in particular to a breather valve and a semiconductor temperature control device, the breather valve comprises a shell, the shell is provided with an inner cavity, a first through hole and a second through hole, and the first through hole and the second through hole are respectively communicated with the inner cavity; the air suction valve plate is arranged in the first through hole and is movably connected with the shell through a first adjusting component; the exhalation valve plate is arranged in the second through hole and is movably connected with the shell through a second adjusting part; the breather valve is suitable for being switched between an inspiration state and an expiration state, in the inspiration state, the inspiration valve plate opens the first through hole, the expiration valve plate closes the second through hole, in the expiration state, the inspiration valve plate closes the first through hole, and the expiration valve plate opens the second through hole. When the breathing valve is applied to the circulating liquid system of the semiconductor temperature control device, the breathing function of the circulating liquid system can be realized by arranging the breathing valve capable of simultaneously meeting the requirements of high and low temperature areas through a special structural design, the customization cost is reduced, the structure is simple, and the stability of the circulating liquid system is improved.

The invention discloses a ventilation device (200), a control method of the ventilation device (200) and a computer storage medium. The ventilation device (200) comprises a driving module (201), a breathing circuit (202) and a ventilation control module (203). The ventilation control module (203) controls the driving module (201) to provide ventilation support for a patient through the breathing circuit (202); the breathing circuit (202) comprises an inspiration branch (2021) and an expiration branch (2022); the inspiration branch (2021) is provided with an inspiration valve, and the expiration branch (2022) is provided with an expiration valve; when the ventilation control module (203) is in a double-tube oxygen therapy mode, the exhalation valve is controlled to be closed, the inhalation valve is controlled to be opened, and oxygen-enriched gas is output through the inhalation branch (2021).

Modular ventilator for assisted mechanical ventilation, comprising a turbine (1), an inspiratory manifold (2), and an expiratory valve (3), comprising a pneumatic module (N) having a first casing inside which it comprises the turbine (1) connected to an equipotential connector of the device, a first electronic control board (4), and the inspiratory manifold (2); an electrical module (E) having a second casing inside which it comprises one or more batteries (8), a single-board computer (SBC) (9) with a control interface and, a second electronic control board (10) connected to the first board (4) and to the control interface; a main structure (19) which can allow for the assembly of both modules, and; a screen (20) connected to the SBC (9), secured to the main structure (19) via securing means that allow it to rotate in two main directions.

The invention provides a protective helmet with on-site environment perception ability, which comprises a helmet body provided with a helmet shell, a lining and a wearing structure, the helmet body is connected with a face breathing unit, the face breathing unit is provided with an exhalation valve seat, the exhalation valve seat is provided with an air exhalation interface, and the helmet shell is provided with an air inlet and an air outlet. The exhalation valve seat is connected with an air respirator high-pressure air cylinder assembly through an air supply pipeline, environment sensing units are arranged on the top and the inner side of the helmet body in a scattered mode, a communication unit is arranged at the tail of the helmet body, the environment sensing units are electrically connected with the communication unit, and energy supply modules are arranged on the two sides of the helmet body. And the energy supply module is electrically connected with the environment sensing unit and the communication unit to supply power. According to the invention, on-site videos and audio information of operating personnel can be quickly acquired, data transmission is timely completed through a special communication network, meanwhile, head and respiratory tract protection under nuclear emergency conditions is provided, and the problems of data acquisition communication and respiratory protection of the protective helmet can be effectively solved.

The application discloses a kind of methods for predicting dust miner's breath flow based on random forest algorithm, including dust miner's breath flow prediction system, the dust miner's breath flow prediction system is by miner's breath characteristic parameter monitoring component, respirator and algorithm prediction module Composition, further include: the miner's breath characteristic parameter monitoring component includes heart rate detector, blood oxygen detection device, temperature tester and portable individual breath monitor, the respirator is viscoelastic silica gel half mask, the respirator is equipped with exhalation valve, the half mask inside and outside both sides are evenly distributed with pressure sensor, the algorithm prediction module is by information receiving unit, central processing unit and information output unit Composition, miner's breath characteristic parameter real-time upload to information receiving unit, and import central processing unit and algorithm prediction are carried out data processing after, and output by information output unit, the method prediction model of the present application is robust, and prediction accuracy is high.

The breathing mask with the health protection function comprises a mask body, an air inlet pipe is fixedly connected to the front portion of the mask body, two expiration ports are symmetrically formed in the side, close to the bottom, of the front portion of the mask body, and a detachable filtering assembly is arranged in the end, opposite to the mask body, of the air inlet pipe. A connecting pipe is fixedly connected to the bottom of the air inlet pipe and located between the mask and the filtering assembly, and a detachable air inlet assembly is connected to the bottom of the connecting pipe. The filter assembly comprises a mounting plate inserted in the mounting plate, an exhalation valve mounted in the mounting plate, filter cotton mounted in the mounting plate and located on one side of the exhalation valve, and a first screw cap connected to the end part of the air inlet pipe in a screwing manner; the air inlet assembly comprises an annular plate fixedly connected to the bottom of the connecting pipe. Through the structure, the mask provides an excellent health protection effect, can be used for daily protection, can also be used in a medical environment, is a multifunctional protection product suitable for various environments, and has a wide application prospect.

The invention relates to an oxygen mask for supplying oxygen to a person, which can be modified for use on differently sized faces. The oxygen mask has a holding frame, which has a first cross-brace and a second cross-brace, a substantially gas-impermeable material arranged on the holding frame and which can be stretched between the first cross-brace and the second cross-brace, a headband connected to the holding frame, an exhalation valve arranged on the material and penetrating the material, and an oxygen supply line for providing oxygen to an inside of the oxygen mask, wherein the first cross-brace and the second cross-brace are arranged in two lateral holders, which are opposite each other, wherein at least the first cross-brace is flexible and wherein the distance of the lateral holders to each other is adjustable at least between a first and a second distance.

The present invention relates to the field of talker structures on gas masks, specifically a talker structure that can be converted into a protective state, comprising a talker body, a talker membrane arranged at the upper rear end of the talker body, an exhalation valve arranged at the lower rear end of the talker body, a displacement fixing frame fixedly arranged in the talker body; a talker cover is arranged at the front end cover of the talker body, and a knob is arranged on the talker cover; a displacement pusher is arranged in the displacement fixing frame; and the talker membrane includes a talker membrane seat that can be sealed with the inner wall of the talker body. The present invention can realize the forward and backward movement of the displacement pusher through the knob, and link the closing and opening between the talker membrane and the talker body, and realize the exchange of airflow inside and outside the mask through the gap between the talker membrane and the talker body, effectively reducing the breathing air resistance. When the mask is worn in a non-protective state, the breathing air resistance of the wearer can be reduced by more than 55%, effectively and quickly discharging the hot waste gas exhaled by the person out of the mask.

A breathing apparatus includes a tank containing pressurized breathing gas, a regulator having an inlet connected to the tank, an outlet for providing breathing gas to a user, and a valve configured for controlling a flow of breathing gas between the inlet and the outlet. A facepiece includes a first port for connecting with the outlet of the regulator, a second port adapted to be connected to an air purifying system, and an exhalation valve. A pneumatic pressure adjustment assembly is in operative connection with the exhalation valve, and has a first pneumatic connection in operative connection with a second pneumatic connection in the regulator. The pneumatic pressure adjustment assembly is operable to adjust the internal facepiece pressure for opening the exhalation valve based on whether breathing gas is delivered to the pneumatic pressure adjustment assembly. An alignment mechanism is provided for aligning the regulator with the facepiece.

The invention relates to the field of medical masks, in particular to a safety mask for autonomous respiration monitoring. A medicine supply pipe is mounted in the middle of a mask body, an exhalation valve is arranged below the medicine supply pipe, one end of the exhalation valve extends into the mask body and is connected with a guide cover, an air inlet pipe is arranged above the medicine supply pipe, and one end of the air inlet pipe is connected with the mask body; and the other end is communicated with the airbag. According to the breathing mask, the foam ball moving and displacing along with breathing of the patient is arranged in the exhalation valve of the mask body, when emergency situations such as breathing suppression of the patient occur, airflow at the foam ball is reduced, the motion amplitude of the foam ball is stopped or reduced, and at the moment, the infrared displacement detector recognizes the corresponding motion state of the foam ball; and the opening and closing plate in the air inlet pipe is excited to be opened so as to introduce high-concentration oxygen, so that the oxygen uptake requirement of a patient is ensured, bad conditions such as respiratory depression and suffocation can be effectively, timely and quickly responded, and the stability and the safety of the mask during use are effectively ensured.

A kind of breathing valve for facilitating online monitoring, including valve body, setting and exhalation valve assembly and inhalation valve assembly in valve body, the exhalation valve assembly and inhalation valve assembly all include valve seat, valve disc and guide rod, the valve body top is fixedly connected with valve cover, the inside of the valve cover is equipped with the movement channel for accommodating guide rod lifting, the top of the valve cover is equipped with proximity switch sensor, the proximity switch sensor is electrically connected with external monitoring center by electric connection line or wireless connection, the guide rod is close to or away from proximity switch sensor by lifting action in movement channel, the proximity switch sensor sends guide rod distance change to monitoring center after sensing.

A ventilator (100) ventilates a patient (102) by a high-flow oxygen therapy via a tube system (104). The ventilator has at least one sensor element (110), at least one actuatable inhalation valve or exhalation valve (120) and a control unit (130). The sensor element is arranged and configured to determine and to output a measured variable (112) within the tube system. The measured variable indicates a gas flow within the tube system. The actuatable inhalation valve or exhalation valve is arranged and configured to make possible a flow of a breathing gas from a ventilation circuit (107) of the ventilator. The control unit regulates a ventilation pressure provided by the ventilator via the at least one sensor element and the at least one inhalation valve or exhalation valve such that a predefined maximum pressure is not exceeded in a predefined area (140) of the tube system.

The invention relates to the technical field of medical instruments, in particular to an exhalation valve assembly for an anaesthesia machine and the anaesthesia machine. The exhalation valve assembly for the anesthesia machine comprises an exhalation valve shell (1), a driving gas device (5), an exhalation valve (7), a waste gas connecting pipe (12) and a plurality of driving gas connecting pipes (9 and 10), a driving gas pipeline (3) is arranged in the exhalation valve shell (1), and the exhalation valve shell (1) is provided with a second driving gas connector (6), a third driving gas connector (15), an exhalation valve mounting port (16), a waste gas pipeline connector (11), a loop connector (17) and other connectors. Therefore, the communication with an exhalation valve (7), a waste gas pipeline and an anaesthesia machine loop is realized. The exhalation valve (7) and the safety valve assembly (14) are integrated, connecting and sealing points are reduced, and the leakage risk is reduced. The exhalation valve assembly is compact in structure, uniform in connector, capable of supporting modular assembly and convenient to maintain. The device has the advantages of high integration, high sealing performance, low cost, high reliability and the like, and is suitable for modern anesthesia systems.

An expiratory valve for a ventilation device comprises a valve housing (12) with a fluid line (20, 22) and with a valve diaphragm (14) held by a mounting section (42) of the valve housing (12), wherein the fluid line (20, 22) has a first line section (20) with a valve seat (26) and a second line section (22) different from the first line section (20), wherein a valve body (36) formed with participation of the valve diaphragm (14) rests on the valve seat (26) in a closed position of the diaphragm valve (10) and interrupts a flow path between the first line section (20) and the second line section (22), wherein the valve body (36) of the valve diaphragm (14) is liftable from the valve seat (26) along an extended virtual lift-off path serving as a virtual reference path (Z), wherein at least one region of the valve body (12) is formed as a heat deformation region (78, 80, 82, 84) of a polymer having a shape stability temperature of less than 115 °C, measured according to ASTM D648 at a test load of 66 psi, or / and of less than 100 °C, measured according to ASTM D648 at a test load of 264 psi, and wherein the heat deformation region (78, 80, 82, 84) is a shell-shaped region with a wall thickness of less than 0.9 mm.

The invention relates to a waterproof breathable structure and a gauge pressure sensor, and relates to the technical field of pressure detection. The waterproof ventilation structure comprises a first shell, an exhalation valve and an inhalation valve, wherein the exhalation valve is in one-way communication from inside to outside only when the inner and outer pressure difference is larger than first opening pressure (P1), and the inhalation valve is in one-way communication from outside to inside only when the outer and inner pressure difference is larger than second opening pressure (P2). The first shell is provided with an inner cavity and a ventilation channel communicating the inner cavity with the environment. Reliable waterproof and dustproof protection can be achieved, the change of internal and external pressure difference can be quickly responded, and pressure balance is carried out.

The utility model discloses a single-tank half mask capable of checking air tightness. The single-tank half mask comprises a mask body, a mask protecting soft body, a filter connecting seat, an exhalation valve, a bandage, an air tightness checking assembly and a protecting cover plate, the mask body is a shell with a cavity formed in the rear side, and the cavity is matched with the outline of the lower half portion of the face of the human body. The edge of the outline of the rear side of the cover body is hermetically connected with a surface protecting soft body; the protective face soft body is of a ring-shaped soft body structure with a cavity in the middle. An air inlet and an air outlet are formed in the front side of the cover body; a filter connecting seat is arranged at the air inlet of the mask body, and the filter is detachably connected with the filter connecting seat; an exhalation valve is arranged at the air outlet of the mask body; and the air tightness inspection assembly is arranged in the concave cavity of the cover body and is positioned on the inner side of the filter connecting seat. The single-tank half mask capable of detecting air tightness is simple and reasonable in structural design, stable and firm in connection and excellent in air tightness, and has a good protection effect; the air tightness of the mask can be quickly and effectively checked.

The invention discloses an aerosol inhalation device for children internal medicine, and belongs to the technical field of aerosol administration. An atomization inhalation device for the children internal medicine department comprises an inhalation device shell, an atomization mask and interactive VR glasses, and a pressure sensor and an inertia testing unit are installed at the front end of a one-way exhalation valve; the interactive VR glasses comprise a core chip, and the core chip, the pressure sensor and the inertia test unit are electrically connected with the interactive VR glasses. The problems that when an existing medicine atomization inhalation device is used for the children internal medicine department, time is long, noise is large, children do not cooperate with the device, and more atomized liquid medicine is left are solved, data information of the pressure change speed in the mask is measured in real time, and the core chip judges the expiratory flow speed direction of a child patient according to the data information; therefore, intelligent breathing synchronization, precise atomization control and synchronous breathing information can be combined, the data information picture of the three-dimensional display screen is changed, and the treatment compliance of children is improved.

The present invention belongs to the technical field of manufacturing high-altitude oxygen masks, and particularly relates to a high-altitude oxygen supply and oxygen-saving respirator. The present invention is composed of an oxygen storage cotton protective cover, oxygen storage cotton, an oxygen storage cotton base, a headband connecting band, a storage cotton inlet pipe, an oxygen mask body, an oxygen inlet pipe, an oxygen coil pipe, an inhalation valve seat, a normally closed negative pressure one-way inhalation valve, a normally closed positive pressure one-way exhalation valve, an exhalation valve seat, and a duckbill one-way drainage valve. When used at high altitudes, the present invention has the oxygen storage function of the oxygen storage cotton, realizes the oxygen accumulation and supply in the respirator with low-flow oxygen supply; has a sealed structure design, and the opening and closing combination of the mask valve group is driven by the human breathing pressure and automatically matches the human breathing rhythm, thereby improving the utilization rate of oxygen and realizing the economical use of oxygen carried at high altitudes; has the functions of reducing the oxygen supply temperature difference and dehumidifying inside the mask, and improves the comfort during long-term use.