Proposed is a photocatalytic complex. The photocatalytic complex includes a photocatalyst, and an iodine compound layer formed on a surface of the photocatalyst to cover the same and containing an iodine compound. The present disclosure enables selective degradation of hydrophilic volatile organic compounds by the use of the photocatalyst coated with the iodine compound.

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.

A light system includes a main body defining an internal chamber and a lighting assembly secured to the main body, wherein the lighting assembly comprises at least one light unit configured to emit light. The light system further includes a fan configured to generate an airflow and an airflow circuit configured to direct the airflow out of the main body of the lighting assembly. The light system also includes a tilt detection unit configured to detect a tilt angle of the lighting assembly and to generate a control signal to cause a speed of the airflow generated by the fan to change based at least on a detected change in the tilt angle of the lighting assembly.

A porous carbon material composite formed of a porous carbon material and a functional material and equipped with high functionality. The porous carbon material composite is formed of (A) a porous carbon material obtainable from a plant-derived material having a silicon (Si) content of 5 wt % or higher as a raw material; and (B) a functional material adhered on the porous carbon material, and has a specific surface area of 10 m.sup.2/g or greater as determined by the nitrogen BET method and a pore volume of 0.1 cm.sup.3/g or greater as determined by the BJH method and MP method.

An air sanitizer unit that includes a housing, a substrate, and a light source. The substrate is provided in an interior space of the housing and includes at least one photocatalytic coating on at least one surface that extends along a flow path of airflow through the air sanitizer unit. The light source is disposed within the interior space of the housing in a way such that light produced by the light source activates the at least one photocatalytic coating to purify the airflow. Further, the substrate includes channels for allowing airflow there through, in which a substrate structure defining the channels include the photocatalytic coating and the substrate structure defining the channels is configured such that microbes in the airflow are captured on the least one photocatalytic coating at low airflow rates, in which the low airflow rates are airflow rates less than 20 air changes per hour.

A system and a method for disinfecting air from airborne pathogens, for example, viruses, bacteria, etc., in an airflow system, are provided. One or more first reflectors reflect a high power, ultraviolet laser beam (UVLB) from an ultraviolet laser(s) into one or more airflow channels of the airflow system. One or more second reflectors are attached to internal surfaces of the airflow channel(s), in a free space optical connection to the first reflector(s), for reflecting the UVLB and increasing contact, utilization, and interaction of the UVLB with the airflow in the airflow channel(s) for irradiating and disinfecting the air therein. Air supply components on a ceiling blow the disinfected air from an airflow channel into an enclosed space for inhalation by occupants in the enclosed space, while air exhaust components on a floor exhaust air exhaled by the occupants into an airflow channel, thereby precluding cross-contamination in the enclosed space.

In a photocatalytic device, a photocatalytic filter is formed of a corrugated member and a gas is allowed to flow over front and rear surfaces of the filter from one end toward the other end thereof along a direction in which ridges and valleys extend, and a gas inflow part and a gas outflow part are provided at both end positions of a photocatalytic filter instead of providing a gas inlet-side flow channel and a gas output-side flow channel at positions facing filter surfaces. Thus, a contact area between a gas and the filter surfaces can be maintained, and miniaturization of the device such as reduction in the thickness or diameter can be realized without increasing gas circulation resistance. In addition, enhanced light irradiation efficiency, simplified structure, energy saving, and cost reduction can be realized. Moreover, the problem of heat can be solved.

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 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.

A refrigerator includes a deodorizer installed on an upper surface of a storage compartment. The deodorizer includes a housing in which a flow path is provided, a suction port provided on a lower surface of the housing to suck air, a discharge port provided in the front of the suction port to discharge air, a photocatalytic deodorizing filter disposed at an inner side of the suction port, and a filter light source configured to irradiate light to the photocatalytic deodorizing filter, the flow path is configured to guide air from a rear lower side where the suction port is positioned to a front lower side where the discharge port is positioned, and the filter light source is disposed above the photocatalytic deodorizing filter to face the photocatalytic deodorizing filter in a state of being spaced apart from each other, and positioned above air passing through the flow path.