The present invention provides an air purifier that purifies, disinfect and decontaminate convention air flow by using UV rays. Because the UV rays emitted by the UV light sources are contained within the air purifier, use of the air purifier is safe in that a nearby person can avoid exposure to hazardous UV radiation. Adjustment of operating conditions, such as the UV intensity and wavelength and air speed, is programmable via a remote controller, a smart switch, a smart device, a wireless communication device, a smart home control appliance, a sensing device, and/or a built-in module, which renders the air purifier a smart appliance that may automatically and optimally suits to a user's need based on the user's habit and other physical parameters. Installation and removal of the air purifier, as well as cleaning and replacement of any part thereof, are simple and convenient, as a result of the clever design.

A refrigerator includes a rear assembly panel coupled with an assembly cover panel that includes at least one vent. At least one circulation fan is positioned between the rear assembly panel and the assembly cover panel and is proximate the at least one vent. A filter is positioned between the rear assembly panel and the assembly cover panel and is coupled to a photocatalyst to form an activated carbon filter. A light-emitting diode (LED) panel assembly includes a plurality of LEDs positioned on the rear assembly panel and is positioned to project light on the activated carbon filter. An air circulation path extends through the at least one vent and the activated carbon filter and is configured to direct air along the air circulation path, and the activated carbon filter is configured to filter airborne bacteria and particulate matter from the air as the air passes through the activated carbon filter.

An air filtration device including a housing that includes an air intake and a blower motor mounted within the housing, wherein when the blower motor is in operation, the blower motor generates an air flow from the air intake through an air duct extending vertically from the housing. The air filtration device also includes an air outlet at a distal end of the air duct, wherein the air outlet comprises at least one aperture, wherein when the blower motor is in operation, the air outlet discharges the air flow in a horizontal plane over an occupied zone from a region of the air duct having a vertical height that is less than or equal to twelve inches, wherein the region of the air duct for the air outlet is disposed at least thirty-six inches above the air intake. The air filtration device also includes an air filter.

An incubator for cell and tissue culture under controlled atmospheric conditions has a primary air flow control device that forms a primary, preferably laminar flow, air veil across an opening that allows access to the cells or tissue cultures disposed within the incubator. Preferably, most if not all of the air in the primary (laminar flow) air veil is recirculated, and a secondary air flow control device is used that forms a secondary, preferably laminar flow, air veil between the primary (laminar flow) air veil and a user of the incubator.

An air purification system for a passenger cabin of a transport vessel. The air purification system comprises an elongated air compartment having a panel, with a plurality of openings along the panel. Air filters reside within the various openings to receive air from inside the cabin. The system also includes a plurality of air tubes. Air moves through the air tubes, aided by a source of compressed air to motive flow valves. The motive flow valves create suction to draw air into the air compartment from the passenger cabin. The system also includes at least one UV-C light source. The UV-C light resides within the air compartment, and disinfects the air moving through the air compartment. A plurality of air outlets are also placed along the lower panel, with each outlet configured to release air at selected points to provide a continuous distribution of filtered and disinfected air into the passenger cabin.

A method of preventing and handling indoor air pollution is disclosed and includes: providing a portable gas detection device to monitor the air quality in the indoor environment; disposing 1˜75 gas exchangers within the indoor space to inhale outdoor gas, purify and filter the inhaled gas, and introduce the inhaled gas into the indoor space; and remotely controlling the gas exchangers to enable filtration, purification and gas exchange procedure by the portable gas detection device when the portable gas detection device detects an air pollutant in the indoor space, to reduce the air pollutant in the indoor space under a safe detection value within 1 minute, and form a breathable gas, wherein the air pollutant in the gas in the indoor space is exchanged and exported out to outdoor environment, the gas exchangers have an exported airflow rate of 200˜1600 CADR, and the indoor space has a volume of 16.5˜247.5 m.sup.3.

A fresh air ventilation device for air pollution prevention includes a main body, a blower, a filtering and cleaning assembly, and a gas detection module. The blower is disposed in the main body to guide air convection and form a flow-guiding path. The filtering and cleaning assembly is disposed in the flow-guiding path to filter and clean an air pollution source in the air convection guided by the blower. The gas detection module is disposed in the flow-guiding path of the main body to detect the air pollution source and transmit a gas detection data.

An improved technology for inactivation of viruses, for example the SARS-CoV-2 virus that is causing the Covid-19 pandemic, is described. The technology can include a device that includes a substrate coated in a polymer that is infused with a pathogen inactivating material. In various embodiments, at a given time, a portion of the pathogen inactivating material is exposed to the environment, and the device is configured to periodically or intermittently expose additional pathogen inactivating material to the environment. For example, the polymer can be ablative or sacrificial.

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, nose plug component, monitoring component, and case.

A ventilation register includes a panel having a flange and a plurality of first apertures adapted to allow airflow through the panel, with each first aperture having a diameter or dimensions sufficient to allow movement of an object or entity through that first aperture. A filter is coupled to the ventilation register and has a plurality of second apertures adapted to allow airflow through the filter while inhibiting a movement of an object or entity through the filter.