A face shield assembly with positive pressure airflow comprises a head band, a transparent face shield, a foam spacer, and at least one airflow supply unit providing a positive pressure airflow. The head band attaches the face shield outward and the foam spacer inward. The airflow supply unit has hose(s) to connect the holes distributed in the foam spacer, consequently bring forth airflow on the front of the user's face to prevent the droplets and particles from being inhaled into the user's nose and mouth.

Embodiments relate generally to a cross flow blower (100) including a housing (108) which includes an inlet (104) and an outlet (102), rotating impeller blades (212) located within the housing (108), wherein airflow enters and exits the impeller blades (212) radially, a motor (106) operable to power the rotating impeller blades (212), and a plurality of flow forming blades (210, 214) located within the blower (100) operable to direct airflow within the blower (100).

Embodiments relate generally to a cross flow blower (100) including a housing (108) which includes an inlet (104) and an outlet (102), rotating impeller blades (212) located within the housing (108), wherein airflow enters and exits the impeller blades (212) radially, a motor (106) operable to power the rotating impeller blades (212), and a plurality of flow forming blades (210, 214) located within the blower (100) operable to direct airflow within the blower (100).

A breathing tube (1), for a respirator (2), includes a flexible tube body (3) with a tube axis (4), with a first tube end (5) and with a second tube end (6). A molding (7) is formed at the first tube end (5). The molding (7) extends at least partially along the tube axis (4) away from the first tube end (5) of the tube body (3). A respirator (2) may be provided, including the breathing tube (1), a breathing unit (14) and a breathing air supply device (15). A breathing tube port (16) is formed at each of the breathing unit (14) and at the breathing air supply device (15) for connecting the breathing tube (1). A mounting device (17) is formed at at least one breathing tube port (16) for mounting the molding (7) of the breathing tube (1).

A breathing tube (1), for a respirator (2), includes a flexible tube body (3) with a tube axis (4), with a first tube end (5) and with a second tube end (6). A molding (7) is formed at the first tube end (5). The molding (7) extends at least partially along the tube axis (4) away from the first tube end (5) of the tube body (3). A respirator (2) may be provided, including the breathing tube (1), a breathing unit (14) and a breathing air supply device (15). A breathing tube port (16) is formed at each of the breathing unit (14) and at the breathing air supply device (15) for connecting the breathing tube (1). A mounting device (17) is formed at at least one breathing tube port (16) for mounting the molding (7) of the breathing tube (1).

An air purification apparatus for nasal application is provided for purifying and/or reducing undesirable materials from air intended to enter a nasal cavity. The air purification apparatus for nasal application may include an air purification apparatus, housing component, power component, fan component, filtration component, germicidal irradiation component, aroma component, olfactory substance delivery component, nose plug component, monitoring component, and case. The case may reversibly enclose the apparatus and provide electrical power delivery.

An air purification apparatus for nasal application is provided for purifying and/or reducing undesirable materials from air intended to enter a nasal cavity. The air purification apparatus for nasal application may include an air purification apparatus, housing component, power component, fan component, filtration component, germicidal irradiation component, aroma component, olfactory substance delivery component, nose plug component, monitoring component, and case. The case may reversibly enclose the apparatus and provide electrical power delivery.

In some examples, a system includes a respirator configured to be worn by a user; a sensor operatively coupled to the respirator; and a computing device comprising a memory and one or more computer processors, the memory comprising instructions that when executed by the one or more computer processors cause the one or more computer processors to: in response to receiving data from the sensor, determine, during at least one action that is performed by the user and that corresponds to at least one graphical element, that the fit test was not satisfied; determine, based at least in part on particular context data associated with the fit test, at least one remedial recommendation to satisfy the fit test; and output for display the at least one remedial recommendation to satisfy the fit test.

The invention can be used to produce personal protection systems of respiratory organs (RPE) and organs of vision from airborne and aerosol pathogens. Additionally, it can be used to create mobile low-power closed-type recirculation systems of UV cleaning and air disinfection in small rooms and volumes: salons and cabins of various vehicles, offices, classrooms, medical rooms, etc. According to the claimed characteristics, the invention provides a high level of bactericidal treatment of air flows, including human breathing, by irradiating the flow with UV radiation from UVC-LED source with the formation of multiple times amplified luminous flux in the multi-pass irradiation chamber. The technical result is expressed in a multiple increase in the bactericidal efficacy of the device compared to devices without such a chamber, as well as in the same reduction in the requirements for the radiation power of the primary radiators according to the required bactericidal efficacy of the device.

There is provided a mask for wearing on the face of a user. The mask comprises a mask body, a filter connected to the mask body, an electrical power source, and a control system. The mask further comprises a gas sensor configured to measure properties of a gas, such as a user's breath and/or ambient air.