A modular return air device includes a body and a first air return configured to facilitate incoming air to enter the body, wherein the body has a grille and a damper. The modular return air device further includes one or more sensors configured to collect data regarding the incoming air and a second air return configured to facilitate the air to exit the body of the modular return air device.

A plasma air sterilizer includes a fan assembly, a plasma generator, a plasma generator channel, and a grounded metal isolation mesh, where the fan assembly is a drum-type fan with side air intake which generates uniform air stream to a flat channel and outputs the uniform air stream to the plasma generator channel; the plasma generator channel has a flat structure and is connected to the plasma generator; the plasma generator generates plasma to sterilize air; and the grounded metal isolation mesh is arranged at an outlet of the plasma generator channel. The air sterilizer has a flat structure, so as to facilitate the arrangement of the sterilizer on wall panels, roofs, and the like without occupying extra space. Moreover, a circulating plasma sterilization mode enables the continuous sterilization of indoor air, is not limited to local sterilization, and shows a prominent sterilization effect.

A plasma air sterilizer includes a fan assembly, a plasma generator, a plasma generator channel, and a grounded metal isolation mesh, where the fan assembly is a drum-type fan with side air intake which generates uniform air stream to a flat channel and outputs the uniform air stream to the plasma generator channel; the plasma generator channel has a flat structure and is connected to the plasma generator; the plasma generator generates plasma to sterilize air; and the grounded metal isolation mesh is arranged at an outlet of the plasma generator channel. The air sterilizer has a flat structure, so as to facilitate the arrangement of the sterilizer on wall panels, roofs, and the like without occupying extra space. Moreover, a circulating plasma sterilization mode enables the continuous sterilization of indoor air, is not limited to local sterilization, and shows a prominent sterilization effect.

The present invention relates to a sterilization device. The sterilization device, according to the present invention, comprises: a frame having a first surface into which air flows, and a second surface from which air flows out; one or more discharge electrodes disposed in the frame; and a plurality of ground electrodes alternately arranged with the discharge electrodes. The discharge electrodes each comprise: a framework extending in the direction parallel to the ground electrodes; a first discharge needle protruding toward the first surface from the framework; and a second discharge needle protruding toward the second surface from the framework. The discharge electrodes are inclined at a predetermined angle with respect to an arbitrary axis of rotation parallel to the direction in which the ground electrodes extend, such that a discharge treatment region is formed perpendicularly to a flow direction by means of the alternate arrangement of the discharge electrodes and the ground electrodes parallel to the flow direction. Accordingly, it is possible to sterilize all air passing through the sterilization device, and it is possible to design a compact sterilization device having a wide discharge treatment region within the frame.

The present invention relates to a sterilization device. The sterilization device, according to the present invention, comprises: a frame having a first surface into which air flows, and a second surface from which air flows out; one or more discharge electrodes disposed in the frame; and a plurality of ground electrodes alternately arranged with the discharge electrodes. The discharge electrodes each comprise: a framework extending in the direction parallel to the ground electrodes; a first discharge needle protruding toward the first surface from the framework; and a second discharge needle protruding toward the second surface from the framework. The discharge electrodes are inclined at a predetermined angle with respect to an arbitrary axis of rotation parallel to the direction in which the ground electrodes extend, such that a discharge treatment region is formed perpendicularly to a flow direction by means of the alternate arrangement of the discharge electrodes and the ground electrodes parallel to the flow direction. Accordingly, it is possible to sterilize all air passing through the sterilization device, and it is possible to design a compact sterilization device having a wide discharge treatment region within the frame.

An air purification system and air purification method for the dynamic filtering and static sterilization and disinfection of a central air conditioner, the purification system comprising a first sterilization and disinfection purification device (100), a second sterilization and disinfection purification device (200) and an air circulating device. The first sterilization and disinfection purification device (100) and the second sterilization and disinfection purification device (200) respectively control, according to different operation procedures, the opening and closing of valves (101, 201) that are respectively configured. The first sterilization and disinfection purification device (100) and the second sterilization and disinfection purification device (200) each comprise a filtering unit (103), an adsorption barrier unit (104), a static electret unit (107), a sterilization and disinfection unit (105) and an internal air circulating unit (106). The purification system filters, purifies and sterilizes and disinfects the air, thereby improving the ventilation environment and the ecological environment.

A screen cover device and an air-cleaning device configured to be used together with such a screen cover device, wherein said screen cover device is configured for holding at least one disposable screen cover which when in use, is configured for covering at least a substantial part of an air outflow area of a screen of the air-cleaning device, wherein said screen cover device is provided as an attachment to the air-cleaning device and comprises: at least one disposable screen cover; and a first unit which is configured for keeping the at least one disposable screen cover when not in use and which is configured to be mounted to the air-cleaning device.

An air duct system is disclosed, and includes an air duct having a main body, where the main body of the air duct defines a passageway having a reflective inner surface. The air duct system also includes an ultraviolet light source configured to generate ultraviolet light. The ultraviolet light source directs the ultraviolet light along the reflective inner surface of the air duct.

Methods, systems, and devices for monitoring air quality and controlling air purification in an environment are described herein. The method can include receiving from a device a plurality of air quality parameters for the environment and receiving an indication representing a potential change in occupancy in the environment. In response to the indication of a potential change in occupancy, the method can include determining an air quality target that is based at least in part on at least one air quality parameter in the plurality of air quality parameters and the potential change in occupancy. The air quality parameter can be representative of the quality of air to be achieved in the environment for the change in occupancy. The method can include transmitting instructions to control purification in the environment based at least in part on the air quality target.

Various embodiments of the present invention disclosed herein relate to an air cleaner, and may suck outside air and purify and sterilize the outside air, and may perform sterilization of a filter. An embodiment of the invention disclosed herein discloses an air cleaner including a body forming an appearance; a suction unit formed on the body and introduced with outside air; a discharge unit formed on the body and discharging the air introduced through the suction unit; a fan module provided inside the body and forming a flow of air introduced into the suction unit and discharged to the discharge unit; a filter unit provided inside the body to filter the air introduced into the suction unit; and a light source unit provided inside the body and irradiating light toward an inner side surface of the filter unit.