Product manifolds for use with portable oxygen concentrators and portable oxygen concentrators including such product manifolds. A product manifold for use with a portable oxygen concentrator includes a first product port, a second product port, an accumulator port, an output port, and a flow path. The flow path operatively coupling each of the first product port, the second product port, the accumulator port, and the output port to one another. The product manifold includes a plurality of control ports. Each of the control ports fluidly coupling the flow path. The product manifold includes a first orifice disposed in a first portion of the flow path; a second orifice disposed in a second portion of the flow path; and a third orifice disposed in a third portion of the flow path. Each of the first orifice, the second orifice, and the third orifice being formed by an electrical forming process and having a thickness of between about 0.0025 inches and about 0.004 inches.

An adsorbent material module includes a plurality of tubular adsorbent materials and a plurality of medium materials. Each of the tubular adsorbent materials includes at least one channel and at least one adsorbent layer. The adsorbent layer surrounds the at least one channel. The medium materials are coated on two ends of each of the tubular adsorbent materials, respectively, and the medium materials have a thermal conductivity function or an electrical conductivity function.

The present invention relates to the use of a zeolitic adsorbent material based on faujasite (FAU) zeolite crystals, the Si/AI mole ratio of which is between 1.00 and 1.20, and the non-zeolitic phase (NZP) content of which is such that 0<NZP≤25%, for the non-cryogenic separation of industrial gases by (V)PSA, in particular of the air gases.

The invention also relates to respiratory assistance machines comprising at least said zeolitic adsorbent material.

Provided is a system for adsorbing a gaseous component comprising nitrogen from a pressurized flow of air containing the gaseous component. The system comprises a first adsorption bed, and a second adsorption bed. Each of the adsorption beds are suitable for selectively adsorbing the gaseous component from the flow of air to produce a product gas having a higher oxygen concentration than that of the air. The system includes an adjustable feed gas supply which alternately supplies the first adsorption bed and the second adsorption bed with the air. The first adsorption bed is supplied with air during a first half cycle of operation of the system, and the second adsorption bed is then supplied with air during a second half cycle of operation of the system. The feed gas supply enables adjustment of at least one parameter relating to the amount or respective amounts of air being supplied to the first adsorption bed in the first half cycle and/or to the second adsorption bed in the second half cycle. A connection and valve assembly is provided between the first and second adsorption beds. The connection and valve assembly diverts a portion of the product gas, produced from the respective absorption bed being supplied with the flow of air during the respective half cycle, to the other adsorption bed. This causes previously adsorbed gaseous component to be released from latter. The released gaseous component then escapes from the system, e.g. to the atmosphere, via a vent. A sensor system determines a measure of the flow rate of waste gas, including the released gaseous component, escaping from the system via the vent. The at least one parameter can be adjusted based on the measure in order to tune the performance of the system. Further provided is a method for operating the system.

A portable oxygen concentrator designed for medical use where the sieve beds, adsorbers, are designed to be replaced by a patient. The concentrator is designed so that the beds are at least partially exposed to the outside of the system and can be easily released by a simple user-friendly mechanism. Replacement beds may be installed easily by patients, and all gas seals will function properly after installation.

Proposed is a multi-layer filtration system including a metal catalyst filter unit, a carbon filter unit, and an inorganic compound filter unit. The metal catalyst filter unit includes at least one among metals including Ni, Co, Fe, Cu, Cr, Mg, Zn, Ba, Au, Ag, Pd, Pt, Ru, Mn, and Ti, oxides thereof, and mixtures thereof. The carbon filter unit includes at least one of activated carbon or activated carbon fiber. The inorganic compound filter unit includes an inorganic compound capable of adsorbing toxic gas. The multi-layer filtration system has good removal effect for toxic gas. A filter module including the multi-layer filtration system and a gas mask including the multi-layer filtration system are also proposed.

Apparatus for producing liquid water from the condensation of atmospheric water vapor includes a transportable housing defining a first air inlet, a second air inlet, and an air outlet; first and second doors operable selectively to open and close the first and second air inlets, respectively; and at least one water condensation unit located in the housing between the first air inlet and the air outlet, and between the second air inlet and the air outlet. The housing is configured so that, when at least one of the first and second air inlets is open, at least a portion of an air flow into the at least one open air inlet is passed through the at least one condensation unit and out the air outlet.

A freshwater harvesting assembly includes a micro-scale component selected from a polymer, a foam, and a membrane; a water-sorption material selected from metal-organic framework (MOF), nanosilica gel, and superabsorbent polymer; wherein the water-sorption material is incorporated within the micro-scale component to thereby provide a water-sorption-material-containing micro-scale component; and a housing carrying the water-sorption-material-containing micro-scale component.

A portable pressure swing adsorption method and system for fuel gas conditioning. A fuel gas conditioning system includes a pressure swing adsorption (PSA) system fluidly coupled to a rich gas stream, the PSA system including a plurality of adsorbent beds and configured to condition the rich natural gas stream and produce therefrom a high-quality fuel gas and gaseous separated heavier hydrocarbons, a product end of the adsorbent beds fluidly coupled to a fuel gas line, wherein the high-quality fuel gas is discharged from the product end and supplied to the fuel gas line, and a feed end of the adsorbent beds configured to be fluidly coupled to the rich natural gas stream or a raw natural gas stream, wherein the produced gaseous separated heavier hydrocarbons are recirculated into the rich natural gas stream or the raw natural gas stream.

An oxygen concentrator (100) may have a moisture conditioning system. In some implementations, the concentrator includes a compressor to induce feed gas into the concentrator. A first pathway may receive the feed gas from the compression system. The first pathway may be configured to draw moisture to produce moisture reduced feed gas. The first pathway may lead the moisture reduced feed gas to sieve bed(s) which produce oxygen enriched air with the moisture reduced feed gas. An accumulator may be configured to receive the produced oxygen enriched air from the sieve bed(s). A second pathway from the accumulator may apply the drawn-out moisture to the produced enriched air to produce humidified enriched air. A third pathway may transfer the drawn-out moisture from the first pathway to the second pathway. An outlet coupled with the second pathway may release the humidified enriched air from the concentrator for a user.