An air purifier includes an air inlet portion through which polluted air flows in, a plasma reaction portion connected to and in fluid communication with the air inlet portion and including a discharge region generating discharge plasma, a gas-liquid mixing portion connected to and in fluid communication with the plasma reaction portion, and including a gas-liquid mixing portion housing, a droplet spraying device arranged in the gas-liquid mixing portion housing and including at least one spray nozzle spraying fine droplets, and a fluid mixing device which mixes the fine droplets with first purified air transferred from the plasma reaction portion, and a gas-liquid contact portion connected to and in fluid communication with the gas-liquid mixing portion, defining micro-channels through which a gas-liquid mixture fluid transferred from the gas-liquid mixing portion passes, and including an impactor which captures droplets from the gas-liquid mixture fluid.

An air purifier includes an air inlet portion through which polluted air flows in, a plasma reaction portion connected to and in fluid communication with the air inlet portion and including a discharge region generating discharge plasma, a gas-liquid mixing portion connected to and in fluid communication with the plasma reaction portion, and including a gas-liquid mixing portion housing, a droplet spraying device arranged in the gas-liquid mixing portion housing and including at least one spray nozzle spraying fine droplets, and a fluid mixing device which mixes the fine droplets with first purified air transferred from the plasma reaction portion, and a gas-liquid contact portion connected to and in fluid communication with the gas-liquid mixing portion, defining micro-channels through which a gas-liquid mixture fluid transferred from the gas-liquid mixing portion passes, and including an impactor which captures droplets from the gas-liquid mixture fluid.

In some embodiments, an indoor air cleaning apparatus and a method for removing at least a portion of at least one type of gas from an indoor airflow are disclosed. The apparatus may comprise a cabinet; at least one sorbent bank comprising at least one cartridge; a fan assembly comprising at least one housing including at least one housing inlet and at least one housing outlet, at least one motor and at least one impeller; and a heating element configured to operate in at least one of two modes: an active mode and an inactive mode; and a controller configured to operate in at least two modes: an adsorption mode and a regeneration mode.

A filtration device for an air purification appliance includes a first filtering cartridge structure containing a classic absorbent or adsorbent material selected from activated carbon or zeolite and a second, different filtering cartridge structure holding a filtering medium consisting of a specific adsorbent material which is porous and functionalized with at least one probe molecule in such a way as to trap aldehyde-type chemical contaminants.

A pleated filter structure is provided for the removal of gaseous pollutants from a gas mixture to be filtered. The structure comprises an ideally air impervious filter sheet, being pleated so as to form an adjacent series of slit shaped conduits for the passage of air through the structure, each bounded on either side by the folded sections of the filter sheet, these being joined by a series of top creases and bottom creases. The top and/or bottom creases incorporate slit-shaped openings allowing passage of a gas mixture into and/or out of the structure. Gas to be filtered enters through one side of the structure, passes laterally across the filter sheet section surfaces and exits through the other side. Also provided are methods for the manufacture of a pleated filter structure, comprising forming rows of slit-shaped openings in a filter sheet and providing folds, in alternating directions, along the lengthwise extensions of adjacent rows of openings. Methods for filtering a gas are also provided.

A disinfectant misting system and assembly operably configured to selectively control emission of an atomized spray of disinfectant solution within an enclosed structure at desired times, in desired locations, and for a desired amount of flow through at least one electronic control unit in an effective and efficient manner, and comprising a liquid supply housing with a liquid disinfectant storage tank housing a disinfectant solution, a disinfectant supply pump, an electronically controlled room pressure regulation component, and an electronically controlled pump pressure regulation component fluidly couplable to a liquid conduit assembly operably configured to transport the disinfectant solution to at least one disinfectant emission housing operably configured to emit an atomized spray of the disinfectant solution into the enclosed room space.

To provide a method for disinfecting air and surfaces which provides a continuous protection of people and/or animals from pathogens a given volume, in particular for essentially 24 hours a day, and which can be conducted with people and animals present, a method for disinfecting air and surfaces is proposed, wherein a disinfectant is dispersed into a volume to be disinfected, wherein the disinfectant comprises electrolyzed and/or sterilized water containing hypochlorous acid, and wherein a dispersion rate of the disinfectant is adjusted such, that a concentration of the hypochlorous acid in the volume is continuously between 0.05 mg/m.sup.3 and 10.0 mg/m.sup.3.

Described is related to a dual function robotic cleaning device for removing harmful chemical pollutants, viruses, unpleasant odors as well as particulates from indoor air in addition to cleaning dust and debris from the ground or floors. The device has a floor cleaning unit and an indoor air purification unit integrated in the same body which can operate automatically according to indoor air pollution levels as well as by a user's instructions. The air purification unit consists of a virus zapping filter for eliminating airborne viruses, a chemical and odor filter for removing toxic chemical pollutants and unpleasant odors, a particulate filter for trapping PM2.5, and a chemical sensor for detecting chemical pollutant levels in indoor air, which feeds pollution values to the control unit of the device to trigger the air cleaning operation.

A blower including a blowing unit that suctions and blows air, and at least one of a first venting member that has a first venting hole through which air blown from the blowing unit passes and that includes a coating film including a manganese oxide-based catalyst, activated carbon, a polyacrylate-based dispersant, and a resin, provided on a wall surface of the first venting hole, or a second venting member that has a second venting hole through which air suctioned into the blowing unit passes and that includes such a coating film provided on a wall surface of the second venting hole.

A room 100 in a building has a living etc. space 101 of volume V that is an enclosed space. Ventilation of an air flow F is performed from the outside to the living etc. space 101. Entering/exiting of air as an air current between the inside of the living etc. space 101 and the outside is eliminated, and at least a part of the boundary between the living etc. space 101 and the outside is configured from a gas exchange membrane 310 having a diffusion constant D, a thickness L, and an area A for gas molecules of interest. When air inside the living etc. space 101 is sufficiently agitated and the concentration of gas molecules constituting the air is made spatially uniform, η(t) is controlled so as to vary according to $\begin{array}{cc}\eta \left(t\right)={\eta }_o-\frac{\mathrm{BL}}{\mathrm{AD}}\left(1-\exp \left(-\left[\mathrm{AD}\text{/}L\right]t\text{/}V\right)\right)& \left(9\right)\end{array}$