An air purification and disinfection system includes an apparatus having a housing, an ultraviolet disinfection chamber, an air mover, and an air distribution unit in communication with the disinfection chamber. Air is passed through the disinfection chamber where it is purified and disinfected before it is delivered to the user of the apparatus through the air distribution unit. The apparatus can be configured as an open or a closed circuit system. The system may be configured to purify air in an airplane, a conference room, a classroom, or as a portable unit for an individual user. As a portable unit the disinfection chamber can be incorporated into a back pack, a vest, a purse, a briefcase, a shoulder bag, a cervical collar, or any other format for being carried by the user.

The present disclosure delineates both active as well as passive respiratory filtration systems. The respiratory filtration systems are configured to be worn by a user, providing the user protection from the ambient environment, possibly containing microorganisms, pathogens, particulate matter, and the like. The respiratory filtration system is also designed to protect others by filtering the exhalation air released into the environment by the user. The disclosed respiratory filtration system(s) are comprised from one or more hygienic materials. The hygienic materials are carefully selected and disposed at predetermined locations within the respiratory filtration system, so to optimize user to the observer(s) communications, especially the oronasal cover. Optimized communications include the transmission of distortion-free speech and/or unobstructed view of the user's oronasal area, especially the mouth.

The present disclosure relates to an air purification filter including a substrate, and an enzyme and glycine supported on the substrate, wherein the enzyme includes at least one enzyme selected from the group consisting of β-1,3-glucanase, chitinase, lysozyme, protease, glycosidase, β-galactosidase, endo-β-N-acetylglucosaminidase and endolysine.

A DC power source operating portable human body carrying potential feedback electronic human breath filtration device is an electronic nose mask with directional ionic air filtration control and is the most ideal alternative to conventional filter paper type nose mask. It utilizes potential feedback electronic ionization technique and electrostatic field to remove air borne matters from human inhalation and exhalation breath. It has UV germicidal function and a micro electric fan to provide positive air pressure. It utilizes electromechanical potential feedback technology to improve the rate of ionization at lower voltage level to minimize the generation of Ozone; a moisture collection feature to absorb the condensation from the user's breath. It is light weight and connected to a pocket size control system via a connection cable and has an ionization flux sensing device for user to verify the present of the ionization.

A system includes an array of connected disinfecting filter assembly modules arranged in a plane to filter air that passes through the array as the air flows along an airflow pathway through the array. Each module includes a housing that defines a first slot and a second slot, and a power control unit. A pre-filter can be slid in its operating position along the first slot of the housing, and an electrically enhanced filter can be slid in its operating position along the second slot. The electrically enhanced filter includes a high voltage wire and a ground grid to create an electric field the high voltage wire and the ground grid and an electrical contact pad that electrically connects the power control unit to the high voltage wire when the electrically enhanced filter is located in its operating position in the second slot of the housing.

Aspects of a sound-reducing air purification unit. In some units, the sound-reducing air purification unit can include a filter, a blower that causes air to flow through the filter and into an inlet of the blower, a sound reduction unit between the filter and an outlet, to absorb sound emitted by the blower, a discharge channel that channels the air expelled from the blower to a discharge grille, sound-reducing media positioned on either side of the discharge channel, to absorb sound emitted by the blower within the discharge channel, and a discharge grille that allows the air to flow from the discharge channel into the outlet.

A material for deactivating a pathogenic aerosol includes a supporting fibrous layer and a salt crystal disposed on the supporting fibrous layer. The salt crystal is a coating layer, which partially or completely covers the supporting fibrous layer. The salt crystal includes one or more of sodium, potassium, chloride, magnesium, sulfate, ammonium, phosphate, glutamate, tartrate, and their ions, and the material has an air filtration efficiency of at least 5%.

Hygiene regulations and social distancing are very effective in blocking short distance infections. During the lockdown, the distance rules can usually be adhered to, but what happens when the actual lockdown is over and the people meet again in a confined space? Then additional effective and efficient protection is essential to stabilize infection rates. Since the viruses are spread by contact and droplet infection, technical devices are required that effectively intervene in the chain of infection and effectively block infection. An effective protection is the respiratory mask as known since 100 years.

An alternative to mask is an aerosol protection system for various applications in environment. The protection system consists of adjustable air sucking device and air blowing device in different form factors based on application. The aerosol protection system uses either an air curtain or air shield to prevent the aerosol going from one side of the curtain or shield to the other side.

The present disclosure provides a filter cartridge for a facepiece respirator mask body. The filter cartridge includes a cover, a base, and a filter medium. The cover has a top surface, a cover sidewall, cover support elements, and an inhalation vent. The cover support elements extend downwardly from the top surface. The inhalation vent is located at least primarily in the cover sidewall. The base has a bottom surface, a base sidewall, base support elements, and an inhalation port. The base support elements extend upwardly from the bottom surface. The inhalation port is located in the bottom surface. The base and the cover collectively define an interior compartment. The filter medium is sandwiched between the base support elements and the cover support elements in a manner that divides the interior compartment into an upper chamber and a lower chamber.

Face mask devices, systems, and methods of use include a frame that holds a suitable filter material, including a face mask, over the user's face to form a seal and prevent unfiltered air from being inhaled through the nose or mouth of the user without first passing through the filter material. The frame is removably attached over the users face by, for example, adjustable straps. The frame may be adjustable in size to be suitable for use on user's having different facial sizes, shapes, and/or geometries.