Present embodiments relate to ionization of air flow within heating, ventilation and air conditioning (HVAC) systems. More specifically, but without limitation, present embodiments relate to ionization systems, for example bipolar ionization, which are controlled in part by a signal from or powered by the blower motor controller of the HVAC system so that the ionization system functions when the blower is on.

A method is disclosed in which a gas of hydrogen and nitrogen, or hydrogen and ammonia, or hydrogen, nitrogen, and ammonia, is introduced to a fluidized bed. The gas flows through the fluidized bed, and titanium dioxide particles are introduced to the fluidized bed to form a fluid mixture of the particles and gas in the fluidized bed. The particles are reacted with the gas in the fluid mixture to form particles including titanium dioxide and nitrogen. The particles can be disposed along an air flow path in operative communication with a light source for air treatment.

A system for eradicating pathogens is disclosed. A lamp is provided that emits a far-ultraviolet C (far-UVC) light generates an irradiation zone. A biometric sensor determines whether an individual is present in the irradiation zone. The biometric sensor signals a processor to determine whether the individual has been exposed to a threshold limit of far-UVC light. The processor determines whether the time an individual has been in the irradiation zone exceeds a threshold limit. If the individual has been in the irradiation zone a period of time exceeds the threshold, the lamp is deactivated. A pathogen detection sensor provides user feedback of the existence pathogens and signals the processor to terminate irradiation or provide user feedback to terminate irradiation. The system and method are included in a passenger compartment of a vehicle to eradicate pathogens on surfaces and aerosol. Threshold limits allow eradication while the vehicle is occupied.

An apparatus for inactivating bioaerosol, comprising an enclosure having lumen walls forming a lumen, said lumen having a lumen input opening and a lumen output opening; a ventilator arranged for forcing an air flow through said lumen; in a cleaning section of said lumen, a source of ultraviolet light arranged to irradiate with ultraviolet light all the air passing through said lumen along a length of said cleaning section; an output muffler arranged for reducing a noise of said air flow in output of said lumen output opening; and a downstream turn section of said lumen, downstream said cleaning section of said lumen, arranged for changing a direction of said air flow such that no ultraviolet light in said cleaning section of said lumen is detectable at said lumen output opening.

This publication discloses a filter unit connectable to a mobile communication device including a fan for generating an air flow inside the filter unit, electrodes covered with a photo catalytic material like TiO.sub.2 in the air flow, UV-LEDs illuminating the electrodes, and outlet for the air flow directed in direction of user of filter unit.

The present disclosure relates generally to air filtration devices. More specifically, but not exclusively, the present disclosure relates to an air filtration device comprised of a copper (or copper alloy) medium to inactivate airborne pathogens (e.g., viruses, bacteria, coronaviruses, COVID-19, etc.) and mitigate harmful exposure to said pathogens. The copper medium is a porous mesh (i.e., copper wool) that is positioned within or on a structure to provide support. The air filtration device may be positioned in an HVAC system such that an air stream flows through the copper medium to inactivate airborne pathogens, such as viruses, in the air stream. The air filtration device may be used in combination with, or in addition to, existing HVAC system conventional air filters (e.g., HEPA filters). The air filtration device includes a copper medium positioned on a face mask to inactivate airborne pathogens during respiratory processes.

A vent register includes an adjustable vane, an actuator carried on the adjustable vane and a fragrance element carried on the actuator. A related method of distributing a fragrance in a passenger compartment of a motor vehicle is also disclosed.

Aspects of the present disclosure include a method of managing scent in an environment, which includes disposing at least one scent diffusion device within an environment, wherein the at least one scent diffusion device comprises a communications facility that enables transmitting signals to and receiving signals from a remote computer, receiving at least one target value of a scent parameter for the environment at the remote computer, and controlling, via the remote computer, diffusion of a liquid from a source of the liquid in fluid communication with the at least one scent diffusion device to achieve the target value of the scent parameter. Controlling a diffusion rate of the liquid includes altering at least one of a voltage and a duty cycle applied to at least one component of the diffusion device.

The present invention relates to a device for applying medical and cosmetic radiation to a human body or to parts thereof. Said radiation is preferably optical radiation. The device according to the invention comprises at least one first illuminant for producing the medical and cosmetic radiation. The device also comprises a first air flow for cooling an illuminant and a second air flow for cooling the human body or parts thereof. The device comprises at least one air-conditioning system, which is fluidically connected to the second air flow and designed for the air-conditioning treatment of the air flow. The device is characterized in that the device also has at least one disinfecting chamber, which is fluidically connected to the second air flow and is designed to physically disinfect the second air flow. The invention also relates to a method for operating such a device and to a corresponding disinfecting chamber.

A sterilization air conditioner is provided in this disclosure, which includes an indoor unit and a sterilization device. The sterilization device is arranged on the indoor unit, and the sterilization device is configured for sterilizing the air entering the indoor unit and a body of the indoor unit by releasing chemical or physical media. In view of a structure of the air conditioner, a front end of a filter screen of the air conditioner is equipped with a disinfectant dripping, drenching, sprinkling, spraying or atomizing or a plasma or ultraviolet or electrostatic negative oxygen ion sterilization device, and disinfectant or plasma or ultraviolet or negative oxygen ion is sprayed to the air conditioner for sterilization. The disclosure has advantages of simplicity, convenience and low investment, and is more suitable for sterilization of household split air conditioners and central air-conditioning fan-coil air conditioners.