A method of providing doses of light sufficient to deactivate bacteria throughout a volumetric space. The method includes: (1) receiving data associated with a desired illuminance level for the space, indicative of an estimated occupancy of the volumetric space over a pre-determined period of time, and indicative of dimensions of the space; (2) determining, based on the received data, an arrangement of one or more lighting fixtures in the volumetric space, the one or more lighting fixtures configured to at least partially emit disinfecting light having a wavelength of between 400 nm and 420 nm, and a total radiometric power to be applied via the one or more lighting fixtures to produce a desired power density at any exposed surface within the volumetric space during the period of time; and (3) installing the determined arrangement of one or more lighting fixtures in the volumetric space.

In an example, a method of operating a UV light source for a vehicle includes measuring an amount of power on a commodity power feeder, determining when the measured amount of power is greater than a threshold amount of power and, responsively, actuating a switch to a first state in which the switch decouples the UV light source from the power on the commodity power feeder. The method also includes determining when the measured amount of power is less than the threshold amount of power and responsively actuating the switch to a second state in which the switch couples the UV light source to the power on the commodity power feeder. The method also includes, while the switch is in the second state, activating the UV light source, using the power from the commodity power feeder, to emit UV light in the vehicle.

Methods, systems, and devices relating to an electronic scented candle that is convenient to use and enables rapid generation and dissipation of scented materials are described. One electronic candle device includes a shell that has a through hole, a flame element protruding through the through hole, an installation lid including a locking base to allow removable coupling of a fragrance container, a scent chamber including a locking clip, a first channel, a second channel, a third channel, and a fourth channel. The scent chamber is removably coupled to the locking base by the locking clip, and an air pump provided to supply pressurized air.

A volatile material dispenser comprises a base that houses a printed circuit board. The base includes at least one button and a plurality of visual indicators along a front portion. The volatile material dispenser further comprises a stand assembly that is coupled with the base. The stand assembly includes a platform defining a front portion and a rear portion, a stand that is disposed above and on the rear portion of the platform, a manifold that is disposed at an upper end of the stand and defines an outer side surface from which extends a plurality of radially spaced ribs, and a piezoelectric assembly disposed within the manifold. The volatile material dispenser further comprises a cover that is configured to be attachable to and detachable from the base. The cover defines a chimney that defines a longitudinal axis. The manifold includes a refill chassis.

A fragrance suitable for a user can be provided. A mobile terminal includes: an acquisition unit that acquires a psychosomatic state from a physiological index of a user; an input unit that inputs future information of the user; a determination unit that determines a recipe including one or more types and a mixing ratio of one or more perfumes based on the psychosomatic state and the future information; and a communication unit that transmits the recipe to a fragrance generation device.

An air treatment unit 10 for attachment to a fan coil unit 12 for treating air from an indoor setting, the air treatment unit 10 including: an inlet 14 for connection to a ducting system that receives indoor air; a treatment volume 22 for receiving air flow from the inlet 14; a UV-C light source 24 within the treatment volume 22 for exposing the air in the treatment volume 22 to UV-C radiation; and an outlet 16 for discharge of treated air to the fan coil unit 12, the outlet 16 is configured for connection to an inlet plenum 18 of the fan coil unit 12.

The present invention discloses an air purifier with a photocatalyst, including an air intake structure and an air discharge structure. The air intake structure is provided with a purification cavity, and a connection seat is provided in the purification cavity and is provided with a photocatalyst purification member detachably mounted to the connection seat. The air purifier with a photocatalyst of the present invention has a simple structure and a rational design, and demounting and mounting operations of photocatalyst purification member are simple, easy and quick, thereby effectively improving the demounting and mounting efficiency of the photocatalyst purification member.

An air treatment system is provided which includes an appliance and a replaceable cartridge installable therein. The replaceable cartridge contains a liquid compound to be aerosolized and has a cartridge outlet through which the aerosolized compound is discharged during operation. A pump is provided to supply air to the replaceable cartridge to generate the aerosolized compound from the liquid compound contained in the replaceable cartridge, and a controller is provided for controlling the pump to supply the air to the replaceable cartridge to generate and discharge the aerosolized compound from the appliance. The appliance is particularly adapted to be plugged into an electrical wall outlet to be supported by the same within a room for treating the interior air space thereof.

A bipolar ionizer comprising an electronic circuit, microprocessor, and step-up transformer providing high-voltage signals to carbon-fiber electrodes producing bipolar ion concentrations greater than +/−200 million ions per cubic centimeter. The bipolar ionizer monitors, reduces, and converts high-voltage signals to feedback signals used by the microprocessor to vary a frequency and a duty cycle of a digital signal to control an excitation signal for a step-up transformer output voltage to consistently maintain an unbalanced high-voltage output ratio less than 80 percent, balanced bipolar ion concentration ratio greater than 80 percent, and zero ozone concentration over a range of electrical signal inputs. The microprocessor calculates and reports bipolar ionizer concentrations based on feedback signals. The microprocessor monitors concentrations of Volatile Organic Compounds (VOCs) in an airflow serving the bipolar ionizer and adjusts the positive/negative DC high-voltage signals and bipolar ion concentration when VOC concentrations are above a threshold.

The present invention provides for a system for disinfecting air circulated in an HVAC system. The system includes a multi-phase system, wherein the multi-phase system comprises at least six segments, with at least one segment representing each of at lease one air intake, at least one air handler, and at least one connecting ductwork. The system has at least one interchangeable filter, wherein each filter in said at least one interchangeable filter is an elongate three-dimensional grid with a series of openings to allow circulated are to flow over the air filter's elongate surfaces. The system also has a plurality of ultraviolet lights, and an airborne disinfecting system with at least one spray nozzle mounted to said at least one connecting duct, wherein a supply hose connects said at least one spray nozzle to at least one reservoir of disinfectant.