A system and method for controlling air quality within an indoor space are disclosed. An example system includes an air circulation unit that moves air through ductwork of a heating, ventilation, and air conditioning (HVAC) system and an air sanitization unit within the ductwork of the HVAC system that sanitizes air passing through the ductwork of the HVAC system. The system further includes an indoor air quality controller that controls a rate at which the air circulation unit moves the air through the ductwork of the HVAC system responsive to inputs received at the indoor air quality controller and controls an operational status of the air sanitization unit responsive to the inputs received at the indoor air quality controller.

Proposed is an air conditioning facility for preventing spread of an infectious disease, the air conditioning facility including a first chamber having a plurality of air discharge holes configured to allow air processed by an air conditioner to be discharged toward an indoor space, an air suction pipe connected to the indoor space and a suction hole of the air conditioner and having a suction end configured to allow air to be suctioned from the indoor space; and an ultraviolet light irradiation unit disposed on a path in which air suctioned from the air suction pipe is discharged through the air discharge holes and configured to emit UV light for sterilization.

Proposed is an air conditioning facility for preventing spread of an infectious disease, the air conditioning facility including a first chamber having a plurality of air discharge holes configured to allow air processed by an air conditioner to be discharged toward an indoor space, an air suction pipe connected to the indoor space and a suction hole of the air conditioner and having a suction end configured to allow air to be suctioned from the indoor space; and an ultraviolet light irradiation unit disposed on a path in which air suctioned from the air suction pipe is discharged through the air discharge holes and configured to emit UV light for sterilization.

Disclosed embodiments relate to a combination axial fan and LED lighting system configured to fit into the footprint of a standard ceiling tile. Disclosed embodiments further include ceiling tiles with a built-in fan and/or LED lighting. The disclosed systems may include one or more UV-C light sources which irradiate contaminants as air flows through the UV-C unit. The UV-C unit is mounted on either a universal mounting mechanism or a mobile support unit to provide mobility to the UV-C unit.

Disclosed embodiments relate to a combination axial fan and LED lighting system configured to fit into the footprint of a standard ceiling tile. Disclosed embodiments further include ceiling tiles with a built-in fan and/or LED lighting. The disclosed systems may include one or more UV-C light sources which irradiate contaminants as air flows through the UV-C unit. The UV-C unit is mounted on either a universal mounting mechanism or a mobile support unit to provide mobility to the UV-C unit.

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.

The present invention provides for a system for disinfecting air circulated in an HVAC system. The system includes at least one spray ring forming a continuous loop surrounding an outer surface of HVAC ductwork. The system further includes a plurality of spray nozzles connecting to each of the spray rings in the at least one spray ring, wherein each nozzle extends through an aperture in the HVAC ductwork, wherein a space between each nozzle and each aperture is sealed by a rubber gasket.

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.

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.

An air conditioner unit may include a housing, an outdoor heat exchanger assembly, an indoor heat exchanger assembly, a compressor, a bulkhead, and a sterilization light assembly. The housing may define an indoor portion and an outdoor portion. The housing may further define an exhaust outlet downstream from the indoor portion to exhaust air. The outdoor heat exchanger assembly may be disposed in the outdoor portion and include an outdoor heat exchanger. The indoor heat exchanger assembly may be disposed in the indoor portion and include an indoor heat exchanger and an indoor fan. The bulkhead may be disposed between the outdoor heat exchanger and the indoor heat exchanger along a transverse direction to define the indoor portion and the outdoor portion. The bulkhead may further define a vent aperture therethrough. The sterilization light assembly may be disposed within the indoor portion downstream from the vent aperture.