A smart mask includes a face covering, an attachment member, one or more power source(s), an air circulation subsystem, an exhaust subsystem, and a controller. The face covering is configured to cover a face area of a wearer. The attachment member is configured to attach the face covering onto the face area of the wearer. The air circulation subsystem is powered by at least one of the one or more power source(s) and configured to filter outside air and draw the filtered outside air into the face area. The exhaust subsystem is placed below the air circulation subsystem and configured to purge exhaled air out of the face area. The controller is configured to control the air circulation subsystem.

A mask machine protection frame device with function of air filtering includes an outer frame being a hollow frame for receiving a mask machine therein; an outlook of the outer frame; and at least one air filter installed at an upper side of the outer frame for sucking outer air into the outer frame; the air filter including at least one fan and at least one filter device; the fan serving to suck outer air into the filter device for air filtering so as to flow out clean air; and the clean air then flowing to the mask machine. The outer frame can be installed with at least one fire proof plate and a surface of the fire proof plate is coated with an anti-electric static layer.

A self contained, 1 V to 550 V powered UVC device used to sterilize spaces like vehicle cabins or indoor rooms or spaces, while providing the ability to monitor both pre and post sterilization. While operating, the device would collect, on suitable gathering/testing media, both air that has been sterilized, and unsterilized air that passes through the media, allowing the media to be tested for the presence of both active pathogens that have not yet been killed from the device, as well as killed pathogens in the sterilized area. The UVC and media components may be integrated into one unit, or be powered and used both in combination, or as separate devices performing the sterilization and the sampling media. At the termination of UVC sterilization, additional different media has the now sterilized cabin or room air circulated through it, and with further media testing and evaluation, the efficiency/effectiveness of the sterilization process can be audited, and system operators can be advised.

An air cleaner is provided. The air cleaner includes a main body, a case coupled to an outer side of the main body and comprising a suction port for sucking air into the main body, a filter unit disposed inside the main body, a dust sensor for sensing dust concentration, a first flow path provided so that air sucked through the suction port is flown to the side of the dust sensor, and a second flow path provided so that air filtered through the filter unit is flown to the side of the dust sensor, and the dust sensor may sense first dust concentration of air provided through the first flow path and sense second dust concentration of air provided through the second flow path.

The present disclosure concerns the field of vacuum cleaners and, in particular, those which have a filter bag for collecting air entrained detritus. The invention relates especially to a vacuum cleaner which reduces the exposure to the operator of dust and contaminated matter collected during cleaning when replacing the filter bag. The invention provides a vacuum cleaner comprising a suction drive unit in fluid communication with a vacuum chamber for accommodating a filter cartridge, the vacuum chamber itself being fed by a fluid inlet port in communication with a nozzle via which air is drawn into the vacuum chamber when the suction drive unit is in operation, wherein the filter cartridge comprises a gas-porous membrane including wall portions which define a filter interior, the cartridge having an airflow inlet at one end through which air-entrained dirt enters the filter, with dirt retained in the interior and air passing through the gas-porous membrane, wherein the chamber is configurable between open and closed configurations, so that in the closed configuration the cartridge filter is enclosed and constrained within the vacuum chamber with the cartridge inlet disposed so as to be fed by the fluid inlet port, and in the open configuration the constraint is at least partially removed so that the cartridge is free to be removed from the chamber by travel in a removal direction.

Gas recirculation systems for use in endoscopic surgical procedures including a gas recirculation pump are disclosed. The gas recirculation pump may work in conjunction with an insufflator used to inflate a patient's peritoneal cavity during surgery. The gas recirculation system may recirculate a flow of gas from and to the patient, based on a detected amount of smoke in the gas, while filtering particulate matter out of the gas and while maintaining an adequate moisture content in the gas. A controller may adjust the speed of a pump motor based on the detected amount of smoke, and may also open a suction exhaust path to vent gas and smoke if the amount of smoke detected exceeds a threshold.

A filter device for a vacuum cleaner having a turbine device and a motor. The vacuum cleaner includes two chambers and filter elements of the filter device are dedusted by an abrupt change in position of a dividing element in the chambers. Since, when one of the two chambers is being dedusted, the suction operation of the vacuum cleaner can be maintained through the other chamber, the filter dedusting can advantageously take place during continued suction operation of the vacuum cleaner. A method for dedusting a filter device in a vacuum cleaner, wherein, as a result of a valve being actuated, an air volume is driven out of one of the two chambers so that a dividing element is advantageously made to change position, and this can result in a backflushing pulse and mechanical shaking of the filter element, and dedusting of the filter device.

The disclosure provides a device for purification, sterilization and deodorization of air. The device includes a housing, a sterilization and disinfection device, a fan, a deodorization device, and a photocatalyst reactor. The housing is in a barrel shape and includes a side wall including a plurality of air inlets. The fan is disposed on one end of the housing. The deodorization device, the photocatalyst reactor and the sterilization and disinfection device are disposed in the housing.

A particle separator assembly includes an airbox providing an outer tapered portion tapering from a first section having a first cross sectional area to a first opening having a second cross sectional area less than the first cross sectional area. The example assembly includes a flow diverter providing an inner tapered portion that tapers to a second opening. The example assembly includes an air filter housed by the airbox, the air filter is spaced from the second opening in a first direction, and the first opening is spaced from the second opening in a second direction opposite the first direction.

There is provided an ear cup comprising a housing, an ear pad attached to the housing and arranged such that the housing and the ear pad together define a cavity having an opening, and an acoustic driver disposed within the cavity. The ear cup further comprises a feedforward microphone, a feedback microphone, and active noise control (ANC) circuitry. The active noise control (ANC) circuitry is configured to use a feedforward signal provided by the feedforward microphone to operate the acoustic driver to attenuate noise having frequencies within a feedforward ANC range having a lower limit of no less than 300 Hz and an upper limit of more than 1.5 kHz and to use a feedback signal provided by the feedback microphone to operate the acoustic driver to attenuate noise having frequencies within a feedback ANC range having an upper limit of no more than 1.5 kHz.