A cooling purified air breathing system for use during activity or in warm environments. The system includes a wearable portable air purifier having an opening for discharging cooling air, and a face mask configured to cover at least a user's nose and mouth. Air tubing is used to direct cooling filtered air into the mask, either through an opening or via a clip and connector attached to an edge of the mask. The air purifier is preferably worn in close proximity to the mask, such as around the back of the neck of the user.

An air filtration system is disclosed. The system comprises an air conduit having an inlet and an outlet, a self-contained electric power source, an electrically powered fan, an air filter located transversely across said air conduit, and an air boundary containment nozzle at the outlet of the air conduit. The nozzle has an outlet diameter of between about 0.5 centimeters and about 4 centimeters. The nozzle minimizes the mixing of the unfiltered ambient air with the filtered air directed to the wearer.

A method of assembling a personal air purifying respirator includes assembling a housing including a blower disposed therein, a filter cavity, and an outlet manifold; installing a filter on the housing; attaching a filter cover to the housing with the filter cover disposed over the filter, wherein the filter cover defines an air inlet; and testing the filter including energizing the blower, introducing a testing aerosol into the air inlet, and measuring air exiting the outlet manifold.

An air purifying device including means for reducing air resistance between the air filtering elements and the target locations for the purified air. Reduced air resistance lowers the energy consumed by the device, thereby reducing its size and weight as well as improving ease of integration with a variety of head gear.

The present technology relates to open respirator devices having sensors for measuring breath biometrics. For example, a respirator device (100) can include a mask component (102) that fits at least partially over a user's face and forms a gap (112) between a periphery of the mask component and the user's face, thereby forming a breathing chamber (108) between the mask portion and the user's face. A fan unit can provide air from the external environment to the breathing chamber for the user to inhale. In some embodiments, the air may be filtered before entering the breathing chamber and the fans may provide a positive pressure seal between across the gap. One or more sensors can be coupled to the mask component for measuring one or more metrics associated with the user's breath.

A face mask has a centrifugal fan assembly, with a radial outlet outside the mask cavity. A flow adjusting element is added to prevent outlet flow from the fan assembly traveling along the outside of the mask and reaching the user, for example at the neck.

A device for enhancing efficiency of an air mask (204) wearable by a user to cover the mouth and nose of the user includes an elongated chamber (202) fluidly couplable at a proximal end thereof to an air opening (205, 205′) of the mask (204). A filter element (206) formed of flexible material is wrapped around a sidewall of the chamber either internally or externally and has a surface area that is at least twice as large as that of the mask for filtering air flowing through the chamber in either direction, and a one-way valve (227, 228) is mounted in association with the opening for allowing filtered air inhaled by the user to pass from the chamber to the mask or for allowing an air exhaled by the user to pass from the mask to the chamber.

A protective system for respiration, and a management method facilitates stably supplying filtered air for safety such that the equipment management or the safety management can be performed remotely. The protective equipment includes a main body that covers the face of an operator, a fan unit including an air filter and an electric fan, a detecting section, a first control section, and a first communication section. The detecting section detects a physical quantity concerning at least one of a work environment of the operator, an action state of the operator, and an operation state of the electric fan. The first control section controls the electric fan based on a detection result of the detecting section. The first communication section transmits first information indicating a detection result of the detecting section or second information concerning an operation amount on a control target of the first control section to an external device.

This application discloses a novel face mask with a neck hanger that facilitates flow of filtered fresh air inside the face mask for inhaling. The neck hanger is a lightweight tube that houses two fans, HEPA or ULPA filters, and a battery with a controller circuit. One fan sucks the air from the environment and after being filtered is blown into the face mask through an air pipe that is attached to both the neck hanger and the face mask. The exhaled air from the nose or mouth is sucked by a second fan through another air pipe, then filtered and released into the environment.

Provided is a powered air blower unit for delivering air flow to a user with constant air flow or varying speeds of air flow. The air blower unit may also include a filter for purifying the air.