Abstract: A fine dust measurement module includes a fluid inlet through which a fluid including fine dust is introduced, a first channel through which first fine dust having at least a first diameter, among the fine dust introduced into the fluid inlet, passes, a second channel through which second fine dust having a second diameter that is less than the first diameter, among the fine dust introduced into the fluid inlet, passes, a fine dust detection sensor for sensing fine dust flowing into the second channel, a heater above the fine dust detection sensor, and an orifice upstream of a flow of the second fine dust from the fine dust detection sensor and the heater.

Abstract: An air purifier includes an air inlet portion through which polluted air flows in, a plasma reaction portion connected to and in fluid communication with the air inlet portion and including a discharge region generating discharge plasma, a gas-liquid mixing portion connected to and in fluid communication with the plasma reaction portion, and including a gas-liquid mixing portion housing, a droplet spraying device arranged in the gas-liquid mixing portion housing and including at least one spray nozzle spraying fine droplets, and a fluid mixing device which mixes the fine droplets with first purified air transferred from the plasma reaction portion, and a gas-liquid contact portion connected to and in fluid communication with the gas-liquid mixing portion, defining micro-channels through which a gas-liquid mixture fluid transferred from the gas-liquid mixing portion passes, and including an impactor which captures droplets from the gas-liquid mixture fluid.

Abstract: According to an aspect of an embodiment, a fine dust measurement module includes a fluid inlet into which fluid including fine dust with particles of various diameters is flowed, a first channel through which, of the fine dust introduced through the fluid inlet, first fine dust with particles having a diameter greater than or equal to a first diameter passes, a second channel through which, of the fine dust introduced through the fluid inlet, second fine dust with particles having a diameter less than the first diameter passes, a flow ratio control nozzle arranged in the first channel and configured to control a flow ratio between fluid flowing into the first channel and fluid flowing into the second channel, and a fine dust sensor configured to sense fine dust flowing into the second channel.

Abstract: A cleaner is disclosed, which comprises a main body including an suction inlet through which air containing dust enters, a dust separator provided to separate dust from the air while the air entering from the suction inlet is moving, a first dust collector configured to collect the dust separated by the dust separator, a cyclone portion configured to rotate the air to separate the dust from the air, and a second dust collector collecting the dust separated by the cyclone portion. The dust separator is provided with a plurality of plate shaped members arranged at a predetermined angle with respect to a moving direction of the air, and arranged to be spaced apart from one another to move the air.

Abstract: A particulate matter collecting apparatus includes a duct, a water sprayer, a micro-channel forming unit, and an impactor. A gas-liquid mixed fluid is formed by spraying water to air flowing along the inside of the duct using the water sprayer. The gas-liquid mixed fluid collides with a collision plate of the impactor after passing through a plurality of micro-channels provided in the micro-channel forming unit. Particulate matter in air is collected by droplets or a liquid film formed on the plurality of micro-channels and the collision plate. Water flowing down from the plurality of micro-channels is discharged through a first water outlet.

Abstract: A particulate matter collector includes: a droplet spray portion which spray water into a duct through which air including particulate matter flows to collect particulate matter in the air; and a dust collection unit including a porous member which collect droplets including the particulate matter, wherein a surface of the porous member is hydrophobically treated such that water may be easily separated from the surface of the porous member.

Abstract: A cleaner includes a housing having a hollow inner space, a housing partition configured to divide the inner space into an first space and a second space, first and second communication holes formed through the housing partition to allow the first and second spaces to communicate with each other, an inlet through which air from an outside of the housing is introduced into the second space, an air discharge port through which air in the first space is exhausted to the outside of the housing, a fan arranged in the first space to draw air to the air discharge port, a first cyclone arranged in the second space to guide air to the first communication hole and separate dirt from the air, and a second cyclone arranged in the second space to guide a portion of air to the second communication hole and separate dirt from the air.

Abstract: A particulate matter collecting apparatus includes a duct, a water sprayer, a micro-channel forming unit, and an impactor. A gas-liquid mixed fluid is formed by spraying water to air flowing along the inside of the duct using the water sprayer. The gas-liquid mixed fluid collides with a collision plate of the impactor after passing through a plurality of micro-channels provided in the micro-channel forming unit. Particulate matter in air is collected by droplets or a liquid film formed on the plurality of micro-channels and the collision plate. Water flowing down from the plurality of micro-channels is discharged through a first water outlet.

Abstract: A cleaner is disclosed, which comprises a main body including an suction inlet through which air containing dust enters, a dust separator provided to separate dust from the air while the air entering from the suction inlet is moving, a first dust collector configured to collect the dust separated by the dust separator, a cyclone portion configured to rotate the air to separate the dust from the air, and a second dust collector collecting the dust separated by the cyclone portion. The dust separator is provided with a plurality of plate shaped members arranged at a predetermined angle with respect to a moving direction of the air, and arranged to be spaced apart from one another to move the air.

Abstract: A cleaner includes a housing having a hollow inner space, a housing partition configured to divide the inner space into an first space and a second space, first and second communication holes formed through the housing partition to allow the first and second spaces to communicate with each other, an inlet through which air from an outside of the housing is introduced into the second space, an air discharge port through which air in the first space is exhausted to the outside of the housing, a fan arranged in the first space to draw air to the air discharge port, a first cyclone arranged in the second space to guide air to the first communication hole and separate dirt from the air, and a second cyclone arranged in the second space to guide a portion of air to the second communication hole and separate dirt from the air.