A lighting assembly for an aircraft includes a visible light source generating visible light and an ultraviolet light source generating ultraviolet light. The visible light source is disposed adjacent to the ultraviolet light source. The visible light source illuminates a first illumination area with the visible light when the lighting assembly operates in a first operation mode. The ultraviolet light source illuminates a second illumination area with the ultraviolet light when the lighting assembly operates in a second mode of operation. The first illumination area substantially overlaps the second illumination area.

A hand wash cleaning and environmental purification diffuser includes tank cover covered on a slot of a water tank in a bottom shell, a diffusing cover assembled to an opening of the bottom shell to shield the tank cover, an air flow channel formed in the oscillation space in the water tank and shaped like a tubular bulge so that when the diffuser is dumped, the liquid in the water tank is less likely to seep directly into the interior of the diffuser or the environment, two oscillators mounted in the oscillation space in the water tank and respectively coated with a layer of acid and alkali resistant coating, users can add safe cleaning liquids such as alkaline ionized water to the oscillation space and atomize into a cleaning mist, which can be used as deodorization and sterilization for hand cleaning, disinfection and environmental purification, and is safe to use.

A process for using photocatalytic load reduction to extend reactive media filtration life is disclosed for an air purification system. The system consists of three methods of cleaning the air including a UV light, a photocatalyst, and an air purifier. Air first passes through a portion with the UV light and photocatalyst, and then through the purifier. Passing the air first through the UV light and photo catalyst before the purifier reduces the load on the purifier and thus allowing the purifier to operate and clean the air for an extended period of time as compared to the purifier alone.

A sterilization and air purification control system and a mounting structure of a waste disposer include a bottom mounting housing and a disposer main machine and a sterilization module. The sterilization module includes an ozone generator driver, a negative oxygen ion generator and an exhaust mechanism. The bottom mounting housing is an accommodating housing and is detachably mounted at a bottom portion of the disposer main machine, an outer edge of the bottom mounting housing is provided with a light strip, the exhaust mechanism is fixedly connected to an inside of one side surface of the bottom mounting housing, and the exhaust mechanism communicates with inner and outer sides of the bottom mounting housing.

A light irradiation device according to an embodiment of the present disclosure has high light irradiation efficiency and cooling efficiency and can be reduced in size. The light irradiation device includes an excimer lamp including a light emitting tube that emits light, and a lamp electrode provided on an outside of the light emitting tube, and a case including a case body in which the excimer lamp is accommodated, a connection support provided at one side of the case body to be connected to the lamp electrode, and a case electrode provided at the other side of the case body to be in contact with a surface of the light emitting tube.

An air breathing device includes a casing and an air passage cavity encompassed by the casing. The device includes a set of air intake ports and air discharge ports that connect the air passage cavity to the outside of the casing. The device includes a set of dampers that allow the air to flow into the air passage cavity during inhalation through the air intake ports. The device includes a set of dampers that allow the air to exit the air passage cavity during exhalation through the air discharge ports. The device includes a retractable display screen to display content to the wearer. The device includes a fixed display screen to display images of the mouth of the wearer captured by a camera lens or simulated based on captured voice of the wearer. The device includes UV lights, filters, network connections, camera lenses, speakers, microphones, ear plugs, and heating coils.

An apparatus for disinfecting an air space is presented. The apparatus includes a housing having a front surface, a back surface, a top surface, a bottom surface, a first end, and a second end. A light emitting diode is inside the housing and configured to emit ultraviolet radiation, at least 90% of which has a wavelength less than 280 nm, in a direction away from the housing into surrounding space. Circuits inside the housing control the light emitting diode to emit radiation at different intensity levels including zero. Motion sensors may be coupled to the circuits to turn the light emitting diode on and off and modulate the intensity of radiation that is emitted, thereby avoiding exposing occupants of the space to harmful radiation.

An ultraviolet air sanitizer apparatus for HVAC systems has a frame defining a flow passage therethrough configured such that the frame rear is insertable into a return air inlet of the HVAC system. A sanitizer light is disposed within the flow passage. When activated, the sanitizer light emits germicidal ultraviolet light into the surrounding flow passage. A light baffle is disposed within the flow passage upstream of the sanitizer light and allows air flow but blocks light. An air pressure sensing switch is electrically connected to the sanitizing light and configured to measure air pressure differential across an air filter. When the air pressure differential is a predetermined value or greater, which is indicative of air circulation by the HVAC system, the switch turns on the sanitizer light. When the pressure differential is less than the predetermined value, the switch turns off the sanitizer light.

A hybrid germicidal irradiation apparatus, method, and system for multi-band germicidal irradiation. A first emitter, a second emitter and a third emitter may be coupled to a housing configured to be coupled to a ceiling of an interior room. The first emitter, the second emitter and the third emitter may respectively be operable to emit UV-C radiation at a wavelength of about 265 nanometers, near-UV radiation at a wavelength of about 405 nanometers and visible light at a wavelength greater than 405 nanometers. One or more radiation sensors may be configured to measure the amount of UV-C light, near UV-C light and/or visible light reflected from a target surface. A controller may be communicably engaged with the radiation sensors to calculate an amount of UV-C radiation, near-UV radiation and/or visible light delivered to a target surface or interior space.

An air sterilization assembly for passenger compartment air sterilization includes a substrate and a set of bulbs. The substrate is mountable within an air conduit of a passenger compartment ventilation system of a vehicle so that the substrate is mounted to the air conduit without substantially reducing airflow through the air conduit. The set of bulbs is engaged to the substrate and is operationally engageable to an electrical circuit of the vehicle. The bulbs emit ultraviolet C radiation, which neutralizes pathogens in air passing through the air conduit.