A ventilator includes a bidirectional breath detection airline and a flow outlet airline. The flow outlet airline includes an airline outlet. The flow outlet airline is configured to be connected to an invasive ventilator circuit or a noninvasive ventilator circuit. The breath detection airline includes airline inlet. The airline inlet is separated from the airline outlet of the flow outlet airline. The ventilator further includes a pressure sensor in direct fluid communication with the breath detection airline. The pressure sensor is configured to measure breathing pressure from the user and generate sensor data indicative of breathing by the user. The ventilator further includes a controller in electronic communication with the pressure sensor. The controller is programmed to detect the breathing by the user based on the sensor data received from the pressure sensor.

The embodiments of the present disclosure provide a portable oxygen concentrator. The portable oxygen concentrator may comprise an input configured to receive air flow, a column comprising a housing, an outer porous tube, an inner porous tube, and an inner cavity, and an output configured to release oxygen to a user. The inner porous tube comprises an adsorbent bed comprising a plurality of zeolites, and the column is configured to channel air radially through and across the outer porous tube, through and across the adsorbent bed in the inner porous tube, into the inner cavity of the column, and through the output. When the air flow contacts the adsorbent bed, oxygen is released.

Regenerable carbon dioxide scrubbers are provided. The regenerable carbon dioxide scrubbers include at least a first housing compartment including an inlet, an outlet, and an interior region. A sorbent material is located within the interior region of the first housing compartment, in which the sorbent material (a) attracts and/or retains carbon dioxide from an air supply passing through the sorbent material at an operating temperature below about 100° C., and (b) releases carbon dioxide at a regenerating temperature above about 150° C. Rebreathers including the regenerable carbon dioxide scrubbers and methods of scrubbing carbon dioxide from a user's exhaled air are also provided.

A composition having the structure of formula I:
[R—Ar—(COOH).sub.2].sub.x[Ar—(COOH).sub.3].sub.2-xM.sub.3.sup.2+  (I)
is provided where M is Mn, Cu, Co, Fe, Zn, Cd, Ni, or Pt; R is a bromine, nitro, a primary amine, C.sub.1-C.sub.4 alkyl secondary amine, C.sub.1-C.sub.4 alkyl oxy, Br—(C.sub.1-C.sub.4 alkyl), NO.sub.2—(C.sub.1-C.sub.4 alkyl), a mercaptan, and reaction products of any of the aforementioned with acyl chlorides of the formulas: CH.sub.3(CH.sub.2).sub.mC(O)Cl, or CH.sub.3(CH(C.sub.1-C.sub.4 alkyl)CH.sub.2).sub.mC(O)Cl, or CH.sub.3(CH.sub.2).sub.m-Ph-(CH.sub.2).sub.pC(O)Cl, where Ph is a C.sub.6 phenyl or C.sub.6 phenyl with one or more hydrogens replaced with F, C.sub.1-C.sub.4 fluoroalkyl, or C.sub.1-C.sub.4 perfluoroalkyl; m is independently in each occurrence an integer of 0 to 12 inclusive; p is an integer of 0 to 36 inclusive, to form an amide, a thioamide, or an ester; Ar is a 1,3,5-modified phenyl, and 1.4>x>0. A process of synthesis thereof and the use to chemically modify a gaseous reactant are also provided.

A tubular filter for dynamic cleaning of an air flow containing suspended particles and a system for filtration using this filter includes a flow channel (1), carried out curved and a unit (6, 8) for generating an air flow in the flow channel (1). The tubular filter is arranged in a low pressure chamber (2) and is configured to generate Dean vortices in its curved portion. On outer and inner parts of the curved portion of the flow channel (1) are provided outer (10) and inner (20) openings, respectively, for discharging suspended particles from the flow channel (1) in the low pressure chamber (2). The system for filtration includes a filtration unit (22) with at least one tubular filter (21), a control unit (17) for controlled regulation of the unit (6) for generating a flow in the flow channel (1) and an electric power supply unit (18).

Lightweight, portable oxygen concentrators that operate using an ultra rapid, sub one second, adsorption cycle based on advanced molecular sieve materials are disclosed. The amount of sieve material utilized is a fraction of that used in conventional portable devices. This dramatically reduces the volume, weight, and cost of the device. Innovations in valve configuration, moisture control, case and battery design, and replaceable sieve module are described. Patients with breathing disorders and others requiring medical oxygen are provided with a long lasting, low cost alternative to existing portable oxygen supply devices.

A personalized air cleaning device having a housing which has at least one air intake region for sucking air into the housing and at least one air blow-out region for blowing the air out of the housing, a cleaned blow-out air stream being directed towards the body, and in particular against the face of a user, the housing of the air cleaning device being of approximately disc-shaped round or oval or polygonal design, and wherein the air intake region and the air outlet region are arranged in the same plane on the circumference of the housing.

Regeneration of a fluid medium can be accomplished using a continuously regenerable scrubber, which, in its various embodiments, combines valve functions and sorbent material, such as amine beds, into one component, dramatically reducing size and mass of scrubber. Sorbent material beds rotate continuously past breathing gas vent loop ports for scrubbing CO.sub.2/H.sub.2O and then past vacuum ports for regenerating the sorbent material. Typically, a first fluid output is connected to a lower header fluid output and a second, sweeping fluid source connected to a lower header fluid input. A motor spins the substantially circular bed assembly at a predetermined speed which allows adsorption or absorption as well as desorption of materials flowing through the sorbent material.

A method of operating a compressor system includes determining an efficiency of a compressor configured to operate at a plurality of output flow settings, including one or more of measuring, calibrating, calculating, or modeling motor efficiency over a range of supply voltage and pulse width modulation duty cycle combinations, each combination including a supply voltage of a plurality of supply voltages and a pulse width modulation duty cycle of a plurality of pulse width modulation duty cycles. The method further includes selecting a supply voltage and a pulse width modulation duty cycle for use at at least one output flow setting of the plurality of output flow settings based on the determined efficiency of the compressor, generating the selected supply voltage by maintaining, reducing, or increasing a nominal supply voltage, and applying the selected pulse width modulation duty cycle.

A breathing half mask, which can be brought by a folding operation from a storage state into a use state. A mouth area is arranged between a nose area (11) with a nose sealing line (41) and a chin area (12) with a chin sealing line (42). A first connection section (14.1, 14.2) connects the nose area (11) and/or the chin area (12) to the mouth area. A second connection section (15.1, 15.2) connects the nose area (11) and/or the chin area (12) to another mask area (10) in order to limit the nose sealing line (41) and/or the chin sealing line (42). The second connection section (15.1, 15.2) extends a distance from an edge of the nose area (11) and/or from an edge of the chin area (12) between the first connection section (14.1, 14.2) and the nose sealing line (41) and/or the chin sealing line (42).