191 results about "Inhalation Valve" patented technology

A therapeutic face mask comprises a face-engaging portion and a single connector having a mask-engaging end and a single treatment-receiving end which has a single attachment mounting for detachably sealingly receiving a treatment attachment, such as an oxygen reservoir bag or a nebulizer. A one-way inhalation valve in the connector permits fluid flow from the treatment-receiving end to the mask-engaging end during inhalation and inhibits fluid flow in the other direction. The mask also includes a valve-governed exhalation port and an anti-asphyxia valve assembly configured to permit fluid flow from ambient to the face-engaging portion during inhalation only when inspiratory effort during inhalation exceeds fluid flow to the treatment-receiving end of the connector. Also provided is an oxygen reservoir bag having a neck shaped for removable coupling to a mating connector of a therapeutic face mask. An oxygen reservoir bag may have a metered-dose inhaler port defined in its neck.

A method and an apparatus for monitoring and controlling flows in medical equipment including an anesthetic machine and a ventilator for influencing a patient's respiratory system are disclosed. The apparatus comprises a microprocessor and an airway system comprising drive gas conduits provided with an inhalation valve (2) and an exhalation valve (5) for gas discharging as well as a ventilator end flow sensor (3) for measuring the introduced or discharged drive gas flow through the valves. The airway system also comprises patient end breathing tubing in which a patient end flow sensor (11) for measuring the patient's inspired and expired gas flow is provided. By comparing the measured values of the two flow sensors against the characteristic curve of the inhalation valve (2), the microprocessor can judge the operation states and accuracy of the respective flow sensors and the inhalation valve (2).

The invention relates to a three-arm tube system (11) for a ventilation appliance (13) suitable for invasive ventilation. Such a ventilation appliance comprises an active inhalation valve and an active exhalation valve (29). The tube system (11) comprises an inhalation tube arm (17), an exhalation tube arm (27) and a ventilation tube arm (37) for attachment to a mask (57), and also a flow sensor (23). According to the invention, a defined leakage (39) is established in the ventilation tube (37), and the flow sensor (23) is arranged between leakage (39) and mask (57). The invention further relates to a ventilation appliance having such a tube system, and to a method for operating a ventilation appliance.

The present invention provides an air-purifying respirator facepiece with a removable, one-piece filter element connector. It also has a removable component housing in the lens as well as a nosecup without inhalation valves that prevents fogging of the portion of the lens used for viewing.

A chemical and biological protection mask that combines a filter cartridge with a miniaturized high-intensity shortwave UV disinfecting system in a compact easy-to-wear and fully portable form factor. The gas mask comprises a mask portion for covering at least the nose and mouth of a user, a one way exhalation valve mounted on the mask portion, a coupling to an inhalation opening into the mask portion, a filter canister, and a novel UV-illumination tube attachable between the inhalation valve coupling and filter canister. The UV-illumination tube further comprises an aluminum tube, a plastic insert positioned inside the aluminum tube, and a plurality of circuit boards seated within the insert. The circuit boards each have a plurality of UV LED lights axially mounted thereon to irradiate and disinfect air passing through the UV-illumination tube. The UV LED lights preferably emit light within a range of from 240 nm˜280 nm wavelength, and are powered by a battery connected to a voltage regulator. A current chopping circuit is connected between said voltage regulator and said UV LED lights for providing pulsed current thereto. An optional solar cell is disclosed for powering the UV LED lights directly or for recharging the battery, and the solar cell may be mounted atop a visor attached to said mask.

A positive pressure airway device for providing resistance in an air pathway for a patient exhaling. The device includes an inhalation passageway for letting air into the device when a patient breathing through the device inhales, and an exhalation passageway for passing air out of the device when a patient breathing through the device exhales. The device preferably includes an inhalation valve to allow air to flow into, but not out of, the inhalation passageway, and an exhalation valve to allow air to flow out of the exhalation passageway only when a patient using the device exhales with an expiratory air pressure greater than a pre-determined pressure. A variable pressure spring may control the force needed to open the exhalation valve.

The invention relates to a three-arm tube system for a ventilation appliance suitable for invasive ventilation. Such a ventilation appliance includes an active inhalation valve and an active exhalation valve. The tube system also includes an inhalation tube arm, an exhalation tube arm and a ventilation tube arm for attachment to a mask, and also a flow sensor. A defined leakage is established in the ventilation tube arm, and the flow sensor is arranged between the leakage and the mask. The invention further relates to a ventilation appliance having such a tube system, and to a method for operating the ventilation appliance.

A gas mask having a filter canister mount including an inhalation valve and a self-sealing mechanism that prevents air inflow when a filter canister is removed from the canister mount. In one embodiment, the self-sealing valve includes an elastomeric diaphragm mounted in the inlet port and includes a hinge and a skirt, the skirt having a sealing surface that is biased into contact with a valve seat. The filter canister includes a projection adapted to act on the hinge to pivot the skirt away from the sealing surface as the canister is fitted to the canister mount. In one embodiment, the canister comprises a stacked-radial-flow arrangement of particulate and carbon filtration media. In one embodiment, the gas mask includes a visor having a pair of spaced optical panels with a hinge mounted therebetween for relative rotational movement.

A half-face respiratory mask is disclosed. The respiratory mask has replaceable filters associated with inhalation valves, the filters further having a minimal relief from an outer surface of the respiratory mask. The respiratory mask may be made of a substantially transparent material, a substantially colorless material, or both, or of a aesthetically pleasing color scheme, and may be of a size, weight, and design such that the respiratory mask is physically discreet and unobtrusive to the user for everyday or active use, and is unobtrusive, discreet, or otherwise aesthetically appealing to users and passersby.

Exhalation and inhalation valves that are sized and adapted to fit on a mask body of a personal respiratory protection device. The exhalation and inhalation valves comprise a valve seat that has a seal surface and an orifice through which an exhale flow stream may pass to leave the interior gas space. A flexible flap is mounted to the valve seat such that the flap makes contact with the seal surface when the valve is in its closed position and such that the flap can flex away from the seal surface during an exhalation to allow exhaled air to pass through the orifice to ultimately enter an exterior gas space. The flexible flap has at least first and second juxtaposed layers where at least one of the layers is stiffer or has a different elastic modulus than the other layer. These valves provide extraordinarily lower pressure drop in use, and they operate more efficiently and require less actuation power to operate. The end user therefore derives greater comfort when wearing a respiratory mask that uses the inventive valve.

A mouthpiece (150A) has an aerosol lead-out flow passage (104), an aerosol lead-out opening (105), and an exhalation discharge opening (106). The lead-out flow passage (104) includes a first flow passage (104A) extending upward, a second flow passage (104B) extending obliquely forward from the first flow passage (104A), and a corner flow passage (104C) for connecting the first flow passage (104A) and second flow passage (104B) of the lead-out flow passage (104). The mouthpiece (150A) has a curvature portion (153) formed by curving that portion of the first flow passage (104A) wall surface which crosses the center line of the first flow passage (104A). The exhalation discharge opening (106) is provided in a wall surface defining the second flow passage (104B), at a position circumferentially displaced from the wall surface portion at which the curvature portion (153) is provided. In the mouthpiece and an inhaler with the mouthpiece, although an exhalation valve and, in addition, an inhalation valve are eliminated, leakage of aerosol from a pressure regulation opening and the exhalation opening is prevented irrespective of usage manners.

The invention discloses an anaesthetic machine, a gas path system comprises an inhalation gas path with an inhalation valve; a flow sensor is arranged in the gas path system and electrically connected with a parameter processing unit for detecting the real-time flow rate of the inhalation gas path; and the parameter processing unit transmits an electrical signal of the flow sensor to a main controller after the processing. The invention further discloses a calibration method of the inhalation valve of the anaesthetic machine, comprising the steps that the main controller controls the opening degree of a valve of the inhalation valve, and the real-time gas flow rate of the corresponding inhalation valve is obtained by the flow sensor, thus obtaining a valve opening table and a valve closing table. The usage of the anaesthetic machine of the technical proposal of the invention only adds one flow sensor, thus having low cost, convenience and practicality. The usage of the calibration method of the inhalation valve of the anaesthetic machine of the technical proposal of the invention can automatically complete the calibration of the inhalation valve after connecting the gas path by a user, thus being convenient and rapid and ensuring the mechanical ventilation of the anaesthetic machine to be more secure and reliable.

The present invention discloses a method for improving control and detection precision of tidal volume by introducing R value, comprising the steps of: a plateau pressure Pplate is used to calculate a system compliance C with C=ΔV / (Pplate−PEEP); VT, the tidal volume obtained currently at patient terminal, is calculated with VT=ΔV×(C−Ctube) / C, wherein ΔV is the variation of tidal volume, PEEP is the positive end expiratory pressure and Ctube is the compliance C of the line. Depending on the calculated VT, the tidal volume which is actually obtained by the patients during this period, the processing unit calculates the tidal volume VT′, which the airway is intended to reach during the next expiration period, by VT′=VT+ΔVT×K wherein K is a scaling factor for control and adjustment, VT is the tidal volume obtained by the patient during the current period, VTset is the presetted tidal volume, ΔVT=VTset−VT. And the processing unit accordingly controls the opening position of the inspiratory valve during the next inspiration period, so as to achieve the purpose of improving control and detection of precision tidal volume.

An inhalation opening 6 and an exhalation-opening 4 are formed in the facepiece 2 of a breathing apparatus 1 and the openings can be closed with an inhalation valve 8 and exhalation valve 7, respectively. If a person wearing the breathing apparatus 1 inhales, the inhalation valve 8 is open and the exhalation valve 7 is closed. A photointerrupter 11 senses the closing operation of the exhalation valve 7 and supplies electric power to a motor 9 to drive a blower 16.

The invention relates to a plunger reciprocating pump which comprises a pump body, a plunger, an inhalation valve bank and an exhaust valve bank. The plunger is glidingly matched in a plunger hole of the pump body, the inhalation valve bank and the exhaust valve bank are arranged in the pump body, and a pump cavity is formed among the plunger, the inhalation valve bank and the exhaust valve bank in the pump body. The plunger reciprocating pump is characterized in that an adjusting plunger component kept on the same central line as the plunger is mounted on the pump body and comprises a sealing packing box, an adjusting plunger, a screw, a spring and an adjusting handle, wherein the sealing packing box is mounted on the pump body and is provided with a hole with a valve seat in the center, a sealing component and a guiding sealing sleeve are mounted in the hole, the outer circumferential wall of the adjusting plunger is mounted in the sealing component and the guiding sealing sleeve, the valve surface of the front end of the adjusting plunger is arranged in the pump cavity and matched with the valve seat in the center of the sealing packing box, and the screw is provided with a lug boss at the front end, a cylinder in the middle and external threads at the tail. The invention has the advantages of great adjusting range, high adjusting accuracy and convenient adjustment and is suitable for adjusting the flow rates of a plurality of drain openings of a multi-cylinder reciprocating pump.

The invention discloses a stepless delivery regulation method of reciprocating-piston compressor, which is characterized in that duty cycle is determined using the maximum delivery and the actually required delivery of the compressor under full load; an inhalation valve is forced to open or freely closed through a control system and a or a plurality of executive device (s) for pressing the inhalation valve, enabling load circulation and non-load circulation to be alternatively distributed to comply with the duty cycle, thereby evenly supplying the required delivery. The invention has the advantages of capability of 0 to 100% continuous delivery regulation, less pressure fluctuation, saved energy, lowered noise, simple and reliable regulation effect.

The invention provides a respirator and a ventilation mode thereof. The respirator comprises a pressure stabilizing valve, an inhalation valve, a flow sensor, an inhalation end pressure sensor 6, an exhalation safety valve 8, a negative pressure device 17, an exhalation switching valve 16, an exhalation valve 15 and a respirator control system. In the inhalation period, the respirator controls the inhalation valve to send air to a patient based on user set parameters and patient signals monitored by the flow sensor, the inhalation end pressure sensor 6 and the exhalation end pressure sensor 19. In the exhalation period, the respirator overcomes resistance generated by an air way and a respiration pipeline when the patient exhales through negative pressure suction output by the negative pressure device 17. Furthermore, the respirator can enable the patient to inhale air with the volume 1.1-2 times of the normal tidal volume, when the patient exhales, the negative pressure device 17 of the respirator is started, the exhalation flow speed of the patient instantly reaches the exhaust air flow speed of the patient in the physiological cough process, and the real physiological cough process of the patient is simulated. The purpose of discharging sputum accumulated in the air way of the patient is achieved.

A medicament delivery system comprises a nebulizer device, an open-faced mist chamber-defining element having a tubular input / output port, a tubular inhalation port connecting to the output port of the mist chamber-defining element, and a sealed unit dose ampoule adapted to fit within the mist chamber-defining element. The nebulizer device includes an ultrasonic transducer responsive to applied electrical energy to generate ultrasonic energy, an ultrasonic transmission horn between an input energy surface at an input end and an energy delivery surface at an output end. The sealed unit dose ampoule can be placed directly into the nebulizer device and acts as both the dose cup and baffle, so that the chance of spillage of drug and the number of components to be cleaned are minimized. The unit dose ampoule has a conical base to allow ultrasonic energy conducted from the ultrasonic system to be concentrated at the base of the ampoule. The inhalation port includes an inhalation valve and an exhalation valve.

A ventilator turbine volume-controlled ventilation method that implements volume-controlled ventilation for a ventilator by means of turbine motor rotational speed control, inhalation phase control, and exhalation phase control. The method comprises the main steps of: the ventilator is started up, a control unit in the ventilator issues a rotation speed U control instruction to a turbine driver, the turbine driver drives a turbine motor, and then the control unit detects the breathing state of a patient, if the patient needs to inhale air, proceeds to an inhalation phase control, and, if the patient needs to exhale air, proceeds to an exhalation phase control, where the inhalation phase control is implemented by the control unit that outputs driving voltage V 1 to regulate the extent to which an inhalation valve is opened, and the exhalation phase control is implemented by the control unit that outputs driving voltage V 2 to regulate the extent to which an exhalation valve is opened. By combining control of some operating parameters of the ventilator with the rotational speed of the turbine motor, the method implements constant current control and real-time synchronous control of the turbine motor, thus allowing air supply to be provided to the ventilator by the turbine motor at places such as in the field where air supply cannot be provided.

The invention relates to an internal-combustion engine with piston reciprocating, comprising body, cover, piston, crankshaft and connecting bar. The piston moves advance and return and is connected with crankshaft through connecting bar. The space on the top of piston sealed by cover is formed blast chamber. Intake valve, air outlet valve and spark plug are set in cover at the top of blast chamber. In said body except blast chamber air compressed unit is set, which comprises inhalation valve, air outlet valve, assistant piston, which can move advance and return, and be connected with said crank shaft through assistant connecting bare, and assistant connecting bar. The outlet of air outlet valve is connected to hollow air conversation room withstanding pressure, in which thermal converter, temperature sensor, fuel nozzle and fuel evaporating and mixing room. The outlet of air conversation room is connected to said inlet of intake valve in blast chamber. The invention can decrease harmful gas NOx released largely because of low temperature, improve work efficiency of gas and decrease burning noise.

The invention discloses an anaesthesia machine flow sensor calibration method and device. The method includes the steps of connecting a monitoring device with a flow sensor in series, closing an exhalation valve, changing the opening degree of the exhalation valve according to the gradually-increasing / gradually-decreasing rule, conducting filtering on the values of monitored flow and the values of the voltage outputted by the flow sensor, reading and recording the monitored value and the value of the voltage outputted by the flow meter for each opening degree of the exhalation valve, generating voltage-flow data tables and the like, and obtaining a set of voltage-flow data tables by presetting a set of organized flow values through the table look-up or interpolation method, wherein the voltage-flow data tables include the flow meters conforming to the equal difference rule or other rules. In the method and device, filtering is adopted, accuracy of calibration is improved, calibration data are simplified into one-dimensional voltage data to be stored, and actual use of the data is facilitated; in addition, the calibration process is automatically completed through a preset program, and the work efficiency is high.

The invention discloses a pressure control device and a pressure control method of a respirator. The pressure control device comprises a flow control valve, a flow sensor 1, an exhalation control valve, a flow sensor 2, an inhalation valve, an exhalation valve, a pressure sensor 1, a pressure sensor 2, a safety valve and a microcomputer control unit. During inhalation of a patient, the flow control valve is opened, the exhalation valve is closed, and air is sent to the patient through the flow control valve; and during exhalation of the patient, the flow control valve is closed, the exhalation valve is opened, the air exhaled by the patient is discharged into atmosphere through the exhalation valve and the flow sensors. The pressure control method is as follows: control curves of the flow control valve and the exhalation valve are preset. When the respirator starts to work normally, the microcomputer control unit outputs a control signal to control the flow control valve through a flow control valve control circuit, and the microcomputer control unit outputs a control signal to control the exhalation valve through an exhalation valve control circuit.

The invention relates to an anti-haze mask special for a child and belongs to the field of daily life protective articles of people. The anti-haze mask special for the child is composed of a silica gel mask, filer installing seats, a PM2.5 filter, fixing belt fasteners, an exhalation valve, a cover body, an inhalation valve, a filter layer and filter cotton. The cover body is arc-shaped and symmetrically provided with the filer installing seats, the exhalation valve and the inhalation valve are installed on the filer installing seats, the PM2.5 filter and the filter cotton are installed on the inhalation valve, and the fixing belt fasteners are installed on two sides of the cover body. The anti-haze mask adopts a structure that an exhalation channel, the filter and an inhalation channel are separated, flows are smooth, a user breathes smoothly after wearing the mask, the face adhesion effect and sealing effect are good, inhaled air is completely filtered and then is inhaled into a human body, the anti-haze effect is good, and the anti-haze mask is special for the child to wear. The problem that an existing anti-haze mask does not tightly attach to the face of the user, is poor in anti-haze effect and enable the user to feel oppressed and uncomfortable after being worn for a long period of time.

A cigarette laser-beam drilling machine, being provided with a input gear(1), a input axis(2), a bearing housing(3), a trans gear box in the same axis line in turn. The gear of the trans gear box transmits two parallel output shafts. The supporting base(5), of which the outside end connects with the negative pressure inhalation valve, is fastened by screws on the web plate of trans gear(4) through a coupling flange(7) in the axle hole of the boring drum input shaft. A boring drum is installed on the boring drum output shaft. A cigarette-rubbing wheel(10)and a cigarette-rubbing wheel spindle(12)are installed on the trans gear(4) with a support frame(11). Three groups of laser focalizers are positioned at an angle of 120 DEG from each other, with one group being installed at the center hole of the negative pressure inhalation valve(8) and another two on the support frame(11). Using the PASSIM DROTOS for tobacco manufactured by the British MOLINS company, the PASSIM can realize the laser-beam drilling online.

The invention relates to the technical field of anti-haze appliances and discloses an inner ventilation type large ventilating section anti-haze mask. The anti-haze mask comprises a breathing mask main body, a first air filter module and a second air filter module, wherein a breathing cavity is formed in the breathing mask main body; the air outlet of the first air filter module is communicated with the air inlet of a left-side inhalation channel through a first hose; the air outlet of the second air filter module is communicated with the air inlet of a right-side inhalation channel through a second hose; the air outlet of the left-side inhalation channel and the air outlet of the right-side inhalation channel are respectively communicated with the breathing cavity through a one-way inhalation valve; and an exhalation channel is communicated with the breathing cavity through a one-way exhalation valve. The anti-haze mask disclosed by the invention is reasonable and compact in structure, the air is filtered by a special module, the first air filter module and the second air filter module are respectively attached to the cheeks of a human body, and the anti-haze mask is comfortable to wear, greatly increased in ventilating section, high in air filtration capacity, low in breathing resistance and suitable to be worn outdoors for a long time and has the characteristics of safety, labor conservation, simplicity and high efficiency.

The inflatable harness crew mask includes an inflatable harness with a compressed gas supply system connected to the inflatable harness independent of oxygen supplied to the mask from an oxygen regulator. The mask includes a valve connector with an exhalation and inhalation valve and an inflation valve connected to a pressurized gas inflation supply assembly including a container portion for a compressed gas cartridge, and a regulator portion connected to provide pressurized gas from the cartridge to an inflation gas supply tube connected to the inflation valve, which is manually operable by the user.

The invention discloses an ultraviolet sterilization mask which comprises a mask body, an inspiration valve, an expiration valve and a power supply, and the inspiration valve is arranged on the mask body. The inhalation valve comprises an inhalation ultraviolet lamp, an inhalation ultraviolet absorption layer, an inhalation fan and an inhalation air filtering layer. The exhalation valve is arranged on the mask body and comprises an exhalation ultraviolet lamp, an exhalation ultraviolet absorption layer and an exhalation fan, and the exhalation ultraviolet lamp is used for releasing ultravioletrays to achieve sterilization; the power source is arranged in the mask body and electrically connected with the inspiration ultraviolet lamp, the exhalation ultraviolet lamp, the inspiration fan andthe exhalation fan. The ultraviolet sterilization mask can effectively kill bacteria and viruses in air.

The invention discloses a method for controlling pressure of an anesthesia machine and a breathing machine in a suction valve and expiration valve cooperative control mode, which is characterized by comprising the following steps of: performing flow rate estimation fuzzy control on suction valve pressure by the traditional flow and pressure cooperative fuzzy control method in a pressure control mode; monitoring a pressure variation condition in a system by using a pressure sensor, transmitting the pressure variation condition in the system to an expiration valve control unit and calculating an expiration valve control deviation; performing proportion integration differentiation (PID) control on set suction pressure through the pressure sensor in the suction process and performing the PID control on positive end expiration pressure in the expiration process by using an expiration valve; and grading expiration valve PID control parameters according to required focus points in the grading range of 1cm H2O to 80cm H2O, fitting the PID control parameters under the pressure at the focus points by a curve fitting method or a broken line approximate method, and synchronously controlling a suction valve and the expiration valve in the control process.

The invention discloses an airbag type ventilation and drainage positive and negative pressure water hammer control valve group. The airbag type ventilation and drainage positive and negative pressure water hammer control valve group is arranged on an infusion pipeline or a container system and comprises a water hammer relief valve, a trace exhaust valve, a high-speed exhaust valve, a rear regulating valve, a negative pressure air suction valve, a manual venting and draining valve and a monitoring pressure gauge; the rear regulating valve is arranged at the outlet end of the high-speed exhaust valve; the water hammer relief valve is directly connected with the top or the lateral side of the negative pressure air suction valve through threads or a flange; the trace exhaust valve is connected with a hole which is formed in the front of the water hammer relief valve; the high-speed exhaust valve is directly connected with the top or the lateral side of the negative pressure air suction valve through threads or a flange; the negative pressure air suction valve is connected with the external infusion pipeline. According to the airbag type ventilation and drainage positive and negative pressure water hammer control valve group which is integrated and omni-directional, the structure is compact and firm, the conveying and the installation are convenient, the reliability is strong, the positive pressure water hammer can be relieved, the relief speed is high, and the water hammer of cavities collapsing due to the negative pressure can be inhibited.

A turbine ventilator pressure-controlled ventilation method comprising the following steps: a ventilator is started up, a control unit in the ventilator controls a turbine motor to rotate at rotational speed U, the turbine motor provides the ventilator with a hyperbaric gas; a detector unit detects the breathing state of a patient, if the patient is in an inhalation state, proceeds to an inhalation phase control, and, if the patient is in an exhalation state, proceeds to an exhalation phase control; the air pressure of an inhalation phase is controlled by the control unit by controlling driving voltage V1 of an inhalation valve to regulate the extent to which the inhalation valve is opened, the positive end-expiratory pressure of an exhalation phase is controlled by the control unit by controlling driving voltage V2 of an exhalation valve to regulate the extent to which the exhalation valve is opened, and, if auxiliary air supply by the ventilator to the patient is ceased, the ventilator is shut down. The method implements real-time synchronous control of the rotational speed of the turbine motor and real-time control of input voltages of the inhalation valve and of the exhalation valve of the ventilator, thus implementing the goals of precision control of motor rotational speed and of target pressure.