An aroma diffuser device for diffusing selected scents into the airspace of interior habitable spaces is disclosed. The disclosed device includes multiple diffusers for diffusing multiple scents into a fan-induced airstream. Two, three or more diffusers can be included in and/or upon the device.

Methods and systems described perform air cleaning and/or sanitization in a heating, ventilation, air conditioning, and/or refrigeration (HVACR) system by detecting a concentration of airborne contaminants in a space serviced by the HVACR system. The detected concentration of airborne contaminants is determined whether it exceeds a threshold relative to a capacity of a first air cleaner. When the detected concentration of airborne contaminants exceeds the threshold, a second air cleaner is selected and enabled to be activated in the space. When the detected concentration of airborne contaminants does not exceed the threshold, the first air cleaner is selected and enabled to be activated in the space. The first air cleaner has a cleaning material different from the second air cleaner, and the first air cleaner, relative to the second air cleaner, treats the space at a lower concentration of airborne contaminants. The second air cleaner includes specifically designed cleaner modules.

An odor control system for landfills includes a vapor device configured to generate an odor neutralizing chemical mixture, and at least one fan directed at a working face of a landfill. The at least one fan includes a fan housing having an inlet opening and a discharge opening connected by a passageway therethrough, a blade assembly positioned within the passageway of the fan housing and configured to rotate to generate an airflow from the discharge opening in a first direction, and a motor coupled to the blade assembly. The system includes at least one nozzle in fluid communication with the vapor device and proximate the discharge opening. The at least one nozzle is configured to disperse an odor neutralizing chemical vapor in the same first direction of the airflow from the discharge opening.

An electro-ionic device configured for being worn on the face of a person is disclosed. The electro-ionic device includes at least two electrical conductors spaced apart from each other defining at least a portion of a respiratory pathway therebetween and a circuit configured to apply a first voltage between the two conductors during inspiration and a second voltage greater than the first voltage during expiration.

Various implementations include a fluid treatment device. The device includes an outer tube, an inner tube, a plurality of blades, and a media. The outer tube includes an inner surface. The inner tube is coaxially disposed within the outer tube. An outer surface of the inner tube and the inner surface of the outer tube define an annulus that axially extends between the ends of the inner tube. The plurality of blades is disposed within the annulus. The plurality of blades is configured to alter a component of a flow direction of fluid flowing over the blades in a circumferential direction and/or a radial direction. The media is disposed within the inner tube. The inner tube defines a plurality of perforations extending between its outer surface and inner surface. The annulus defines an entire flow path of fluid flowing between the outer tube and the inner tube.

An instantaneous sterilization system for ventilation and air conditioning comprises: an air inlet; an instantaneous sterilization device being one or more of a chlorine dioxide disinfector, a hydrogen peroxide or hydrogen peroxide silver ion disinfector, an ultraviolet disinfector, an ULPA ultra-efficient air filter, a HEPA high efficiency particle air filter, a laser disinfector, a microwave disinfector, an infrared disinfector, an X-ray disinfector and a γ-ray disinfector, an output end of the instantaneous sterilization device being provided with a sterilized air outlet, and the sterilized air outlet being communicated with air and serves as an output end of the instantaneous sterilization system for ventilation and air conditioning; and a fan, an air inlet end of the fan being connected with the air inlet, and an air exhaust end of the fan being connected with the input end of the instantaneous sterilization device.

An air purifier (100) includes a housing (400) formed with an air duct (401), an ozone generation device (20), an activated carbon purification unit (80), and a fan (200) arranged in the air duct (401). The air duct (401) includes an air inlet (402) and an air outlet (403). The air outlet (403) is disposed indoors. The ozone generation device (20) and the activated carbon purification unit (80) are arranged in the air duct (401) along the direction of the air inlet to the air outlet (403), and the ozone generation device (20) is used to generate ozone. The fan (200) is used to suck gas from the air inlet (402) during operation and let the gas pass through the ozone generation device (20) and the activated carbon purification unit (80) to be discharged from the air outlet (403) into the room.

Disclosed herein are flexible plasma applicators based on fibrous layers that are capable of rapidly sanitizing a surface via either direct or indirect contact with said surface.

A shoe care apparatus including a chamber including an air inlet and an air outlet; a first duct connected to the air outlet and having an evaporator and a condenser arranged inside; a second duct connected to the first duct and the air inlet; a holder arranged in the chamber and connected to the air inlet; a fan configured to circulate air through the first duct, the second duct, the holder, the chamber; a compressor configured to discharge a refrigerant to the condenser; a first temperature sensor configured to measure a first temperature of air heated by the condenser; and a controller configured to determine a target temperature of the heated air based on the user input, operate the compressor at the operation frequency based on the target temperature and outside air temperature, and control the operation frequency of the compressor based on the target temperature and the first temperature.

A scent dispenser is provided which comprises a cylinder having a cylinder chamber for receiving a hollow piston which includes a piston body that is closely fitted to the cylinder chamber and is slideable therein, upward to a fully extended position and downward to a fully compressed position. The piston body also includes a cylindrical piston chamber having an opening at a bottom end of the piston body, which body is sized and shaped to receive a scent cell therein. The piston further includes a cover attached to or integral with an upper end of the piston body. The scent cell may be in the form of a substrate of nonwoven fibrous material capable of allowing air to flow readily through the scent cell and through a volatile scented substance contained therein. The scent cell may further comprise a coating material capable of reversibly absorbing or adsorbing the volatile scented substance, while allowing air to flow readily through the scent cell. The coating material covers or coats the substrate and may comprise a substantially hydrophilic foam.