The invention relates to a respiratory air purifier device. In order to provide an improved respiratory air purifier device which is able effectively to retain viruses, a respiratory air purifier device 101 is proposed for retention of viruses from respiratory air flowing through the device 101, the latter having an interface 110 designed such that it can be placed by a wearer sealingly onto at least one respiratory opening, a hollow-fibre dialyser 120 as a filter, and a connection piece 130 between the interface 110 and the dialyser 120, wherein interface 110, dialyser 120 and connection piece 130 are configured in such a way as to form an airtight fluid channel which fluidically connects the interface to either only the exterior of the hollow fibres X or only the interior of the hollow fibres I of the hollow-fibre dialyser 120, and wherein the purifier device 101 is designed in such a way that, in at least one flow direction E, A, each flow path pE, pA that runs completely through the purifier device extends through the pores of the hollow-fibre membranes, i.e. transversely with respect to the hollow-fibre membrane, of the hollow-fibre dialyser 120.

A breathing apparatus may include a heater configured to kill harmful organisms in air. The apparatus may include a vest, including a heating chamber disposed on the vest and a cooling chamber disposed on the vest. The heating chamber may include a heat source, and the heat source may heat air disposed within the heating chamber to a predetermined temperature. The heating chamber and the cooling chamber may be in fluid communication. The apparatus may include a breathing tube, including a first end and a second end. The first end may connect to the cooling chamber. The apparatus may include a breathing mask. The second end of the breathing tube may connect to the breathing mask. The cooling chamber and the breathing mask may be in fluid communication via the breathing tube.

A breathing apparatus may include a heater configured to kill harmful organisms in air. The apparatus may include a vest, including a heating chamber disposed on the vest and a cooling chamber disposed on the vest. The heating chamber may include a heat source, and the heat source may heat air disposed within the heating chamber to a predetermined temperature. The heating chamber and the cooling chamber may be in fluid communication. The apparatus may include a breathing tube, including a first end and a second end. The first end may connect to the cooling chamber. The apparatus may include a breathing mask. The second end of the breathing tube may connect to the breathing mask. The cooling chamber and the breathing mask may be in fluid communication via the breathing tube.

According to one or more embodiments, a current limiting device is provided. The current limiting device includes a transformer including: a primary winding configured to accept an input current, a core electromagnetically coupled to the primary winding, and a secondary winding electromagnetically coupled to the core. The secondary winding is configured to provide a current limiting energy source based on the input current where the current limiting energy source is limited to a predetermined maximum current based on at least one characteristic of the core.

A device for individual protection and isolation against pollutants and microorganisms comprises a protection element (1) of the face designed to be worn by the user to at least partially cover the face and a filtering group (2) of the air inhaled and/or exhaled by the user. The protection element (1) is adapted to cover at least the whole face of the user and has at least one mouth for the passage of air provided with a one-way check valve (7) suitable to selectively allow the entry and the exit of air from said protection element (1), said filtering group (2) comprising a filter body (4) housing a filter (15) for purifying the entering or leaving air and in fluidic connection with the inside of said protection element (1) by means of an access made in said protection element (1) distinct from said mouth, said filter body (4) having a first opening for drawing air from the outside and/or the expulsion of air towards the outside and a second opening for the delivery of the air into and/or the withdrawal of air from said protection element (1).

A device for individual protection and isolation against pollutants and microorganisms comprises a protection element (1) of the face designed to be worn by the user to at least partially cover the face and a filtering group (2) of the air inhaled and/or exhaled by the user. The protection element (1) is adapted to cover at least the whole face of the user and has at least one mouth for the passage of air provided with a one-way check valve (7) suitable to selectively allow the entry and the exit of air from said protection element (1), said filtering group (2) comprising a filter body (4) housing a filter (15) for purifying the entering or leaving air and in fluidic connection with the inside of said protection element (1) by means of an access made in said protection element (1) distinct from said mouth, said filter body (4) having a first opening for drawing air from the outside and/or the expulsion of air towards the outside and a second opening for the delivery of the air into and/or the withdrawal of air from said protection element (1).

A system for delivering breathing gas to passengers includes: a face mask including a face part having a breathing cavity, a tube configured to be supplied by pressurized breathing gas, and a reservoir bag disposed between the tube and the face part. A passage connects the reservoir bag to the breathing cavity so that the system is configured to supply the breathing cavity through the reservoir bag. The reservoir bag includes a front portion and a back portion. The front portion is connected to the face mask, and the system has a stowed configuration and a deployed configuration. In the stowed configuration, the reservoir bag is maintained folded between a backing and the face part.

A system for delivering breathing gas to passengers includes: a face mask including a face part having a breathing cavity, a tube configured to be supplied by pressurized breathing gas, and a reservoir bag disposed between the tube and the face part. A passage connects the reservoir bag to the breathing cavity so that the system is configured to supply the breathing cavity through the reservoir bag. The reservoir bag includes a front portion and a back portion. The front portion is connected to the face mask, and the system has a stowed configuration and a deployed configuration. In the stowed configuration, the reservoir bag is maintained folded between a backing and the face part.

Disclosed is a chemical oxygen self-rescue device, including a breathing assembly (1), an oxygen generating assembly (2) and a gas bag; (3) the oxygen generating assembly includes an oxygen generating agent tank (21), a gas discharge valve (23) and an oxygen candle (22); the gas discharge valve is arranged on a component above an oxygen generating agent (213) in the oxygen generating agent tank and below a breathing end of the breathing assembly, and the opening and closing of the gas discharge valve are controlled by means of an inflated volume of the gas bag. The chemical oxygen self-rescue device reduces the resistance to breathing, lowers the temperature of breathed gas and improves the utilization rate of the oxygen generating agent.

Air to be inhaled by a user can be treated to remove contaminants by passing the air through a multistage treatment system. The multistage treatment system can include an inhalation treatment unit for treating air to be inhaled by the user, a mask wearable on the user's face, and an exhalation treatment unit for treating air exhaled by the user. The inhalation treatment unit and the exhalation treatment unit can each include various sub-units and assemblies for removing naturally occurring vapors and pathogens as well as compounds generated by operation of the treatment system.