187 results about "Inhalation Valve" patented technology

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.

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.

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.

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); V_T, the tidal volume obtained currently at patient terminal, is calculated with V_T=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 V_T, the tidal volume which is actually obtained by the patients during this period, the processing unit calculates the tidal volume V_T′, which the airway is intended to reach during the next expiration period, by V_T′=V_T+ΔV_T×K wherein K is a scaling factor for control and adjustment, V_T is the tidal volume obtained by the patient during the current period, V_Tset is the presetted tidal volume, ΔV_T=V_Tset−V_T. 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.

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 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 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.