Disclosed herein are systems and methods for treating air.

A photocatalyst filter is provided. The photocatalyst filter includes: a base in which an internal space is formed. The internal space is permeable to fluid, and a plurality of photocatalyst beads are provided in the internal space, wherein a surface of the internal space is reflective.

A multi-functional air purification filter includes: a breathable support layer; a mesh layer provided on the breathable support layer; and a filter layer provided on the mesh layer, wherein at least a portion of the multi-functional air purification filter has a plurality of bends, and the mesh layer includes a coating layer of at least one of a photocatalytic material, an adsorption material, or a sterilizing material.

An air purification apparatus and methods of air purification and treatment using ionization is disclosed. In some embodiments, an ion generator apparatus comprises a modular electrode and a housing connected to the modular electrode. The modular electrode includes an elongated conduit body comprising a power receiving end and a conduit connecting end opposite the power receiving end; and a plurality of ion generating elements occupying different radial positions around a perimeter of the conduit body, the ion generating elements generating negative ions or positive ions in response to an applied alternating current. A first electrical connector on the power receiving end is connectable to a second electrical connector on the conduit connecting end of another conduit body, such that a plurality of conduit bodies can be connected together in a series. The housing is connected to a power receiving end of one of the conduit bodies of the modular electrode.

Disclosed is a method for disinfecting and cleaning to prevent contamination of a passenger vehicle, characterized in that it includes the following operations: —installing at least one filter and condenser in the ventilation circuit; creating a swirling vortex of a disinfectant liquid by a gas referred to as a driving gas; spraying the swirling mixture created onto the clothing and luggage of passengers before they enter the passenger compartment; and spraying the mixture created onto the solid surfaces and/or into the air of the passenger compartment to be disinfected. Also disclosed is a device for implementing the method.

An air purification system includes a conduit extending between an inlet and an outlet, each in fluid communication with an enclosed environment. Ambient air from the enclosed environment enters the conduit via the inlet and treated air exits the conduit and enters the enclosed environment via the outlet. The system further includes a fibrous filter disposed within the conduit and configured to treat the ambient air thereby generating the treated air, and a renewal unit disposed within the conduit and configured to renew the fibrous filter.

A sanitizing spray system includes a Nitrogen generation system that produces Nitrogen used as a carrier gas source for spraying an alcohol-based disinfecting and sanitizing composition without flashing.

A multifunctional air pollution reduction device includes a tool and a multifunctional pollutant remover. The multifunctional pollutant remover is adjacent to or integrated with the tool. The multifunctional pollutant remover can not only reduce air pollution, but also help reduce one or more of the following problems when using the tools: noise, vibration and/or slip.

A fluid treatment apparatus including a photocatalyst filter having a first surface and a second surface, a light source unit spaced apart from the photocatalyst filter to provide light to the first surface, a housing including an inlet, an outlet, and a flow path formed between the photocatalyst filter and the light source, and a guide member disposed at one side of the housing and including at least one slat to guide a movement direction of a fluid, in which the slat is inclined at least in a direction closer to the first surface of the photocatalyst filter along an advancing direction of the flow path when an air flow rate of the fluid has a first value, and in a direction away from the first surface of the photocatalyst filter along the advancing direction when the air flow rate of the fluid is greater than the first value.

In various embodiments, methods of treating a space to reduce a concentration of volatile organic compounds present in the space using chlorine dioxide are provided. A method can include application of aqueous and gaseous chlorine dioxide solutions within the space or to materials located within the space. Treatment of materials that emit volatile organic compounds with chlorine dioxide can reduce the emission rate or shorten the volatile organic compound emission cycle of the material. Soft surface substrates such as carpeting materials can be treated with chlorine dioxide to reduce volatile organic compound emission and/or to reduce the number of microorganisms present in the material.