Provided is a filter cleaning device capable of cleaning a filter while suppressing the shortening of the life of the filter.

The present technology provides a filter cleaning device that determines a contaminated region from a plurality of regions of a filter that captures particles or molecules, and supplies energy for reducing a contamination level to some of the plurality of regions determined as the contaminated region. According to the present technology, it is possible to provide a filter cleaning device capable of cleaning a filter while suppressing the shortening of the life of the filter.

A blower includes: a fan; a lower body having an inner space to receive the fan, and a suction hole; a first upper body communicating with the inner space and having a surface with a first discharge hole; a first damper movably coupled to the first upper body and penetrating the surface; the first damper having a first end facing an outside of the first upper body and a second end opposite to the first end; and a first bar extending along and coupled to the second end of the first damper.

A microbial ventilation device has a cone-shaped coandella and an air blower assembly. The air blower assembly includes a housing has a first end, a second end, and an air flow passage extending between the first and second ends. The air blower assembly further has an electric fan configured to draw air into the air flow passage through the first end and discharged the air from the air flow passage through the second end. The housing is disposed in relation to a bottom surface of the coandella such that the second end is spaced a distance from the bottom surface so that air discharged from the air flow passage impinges upon the bottom surface and is caused to flow along the bottom surface in a radial outward direction and then beyond a peripheral edge of the coandella creating an air dome of radially out flowing air.

An environmental control system of a vehicle including a first inlet for providing a first medium, a second inlet for providing a second medium, a compression device arranged in fluid communication with the first inlet, and an expansion device separate from the compression device. The expansion device is arranged in fluid communication with the second inlet. Energy extracted from the second medium within the expansion device is provided to one or more loads of the vehicle.

An environmental control system of a vehicle including a first inlet for providing a first medium, a second inlet for providing a second medium, a compression device arranged in fluid communication with the first inlet, and an expansion device separate from the compression device. The expansion device is arranged in fluid communication with the second inlet. Energy extracted from the second medium within the expansion device is provided to one or more loads of the vehicle.

An air purifier includes a cylindrical filter configured to filter pollutants included in air that enters the air purifier, and a plurality of speakers coupled to a circumference of an outer surface of the cylindrical filter. A communication interface is configured to obtain information from an external device, and a processor is configured to control the plurality of speakers to output an audio signal corresponding to the information.

A ventilation system includes an inside air passage having inflow and outflow ends communicating with an indoor space to be ventilated, at least one permeable film unit including a permeable film, and an air supply passage having an inflow end communicating with an outdoor space and an outflow end connected to a downstream side of the permeable film in the inside air passage. The permeable film allows a target gas to pass and allows the target gas that has passed through the permeable film to be discharged into outdoor air. The target gas contains at least one of carbon dioxide and a volatile organic compound in indoor air that flows in the inside air passage. Alternatively or in addition, the ventilation system can include an outside air passage and a discharge passage in place of or in addition to the inside air passage and the air supply passage, respectively.

A diffuser for a heating, ventilation, and air conditioning (HVAC) system includes a housing defining a plenum chamber, where the housing comprises a diffusion plate configured to direct a first air flow into the plenum chamber and to discharge a second air flow from the plenum chamber and a plenum plate disposed within the housing, where the plenum plate extends from a first side of the housing to a second side of the housing opposite the first side, and the plenum plate divides the plenum chamber into a first chamber and a second chamber. The diffuser includes a plurality of apertures disposed along the plenum plate, where the plurality of apertures is configured to direct a third air flow from the first chamber into the second chamber to draw the first air flow into the plenum chamber and to force the second air flow out of the plenum chamber.

A system and method for creating a microenvironment within an ambient environment is disclosed. The first outlet is configured for expelling a gas at a first velocity sufficient for producing a gas curtain that separates the microenvironment from the ambient environment. The second outlet is configured for expelling the gas at a second velocity within the microenvironment. An inlet is spaced apart from the first outlet and the second outlet and is in fluid communication with a suction unit. The suction unit is positioned downstream of the inlet and configured for removing gas from the microenvironment through the inlet. The first velocity is greater than the second velocity.

Provided is a clean booth in an assembled state, including: a frame; a wall portion that is provided on the frame and forms an internal space; a first unit that is provided on the wall portion and includes a first fan that supplies air to the internal space via a first filter; and a second unit that is provided on the wall portion and includes a second fan that exhausts the air in the internal space.