An air purifier capable of removing hazardous substances and viruses from air. The air purifier further includes: a body having an air inlet formed on a lower end thereof, an air outlet formed on an upper end thereof, and a flow path formed therein to move air upward; a pre-filter disposed in the flow path of the body; a box-shaped cell type discharge device disposed in the flow path of the body to generate active species; a dust collection device in the flow path of the body and having a discharge part with a linear discharge electrode and a dust collection part for collecting the dust charged through the discharge part; an ozone removal device in the flow path of the body to remove ozone generated from the discharge device and/or the dust collection device; and an air fan disposed in the flow path of the body.

An ionizing device is described, comprising a tubular bulb made of electrically insulating or dielectric material extending along a longitudinal reference axis and having the two longitudinal open ends and opposite each other, a tubular cathode engaged in the bulb, a tubular anode fitted to the bulb, a pair of covers, each of which has a respective internal seat into which a respective end of the bulb is inserted so as to hermetically seal it, and a conductive electrode which extends into the bulb and is electrically connected to the cathode.

A Method for cleaning air in a room (1) with a ceiling (3) and a floor (5), comprising moving an ionization unit (13) above the floor (5) along a support structure provided at a distance to the floor (5); and electrically charging particles in the air by the ionization unit (13).

A Method for cleaning air in a room (1) with a ceiling (3) and a floor (5), comprising moving an ionization unit (13) above the floor (5) along a support structure provided at a distance to the floor (5); and electrically charging particles in the air by the ionization unit (13).

According to an exemplary embodiment of the present disclosure, power is temporarily supplied to the basic dust collector and the first dielectric is charged with an electric charge, and then power supplying is stopped and dust-containing gas passes through a space between a plurality of basic dust collectors or a space between roll-type basic dust collectors to perform dust collection, and as a result, dust can be collected while the use of power supplied to a DC power supply unit from an external power supply is minimized, and further, dust collection efficiency can be increased by a concentration and distortion phenomenon at a portion where the first electrode forming a predetermined pattern is formed in the basic dust collector.

According to an exemplary embodiment of the present disclosure, power is temporarily supplied to the basic dust collector and the first dielectric is charged with an electric charge, and then power supplying is stopped and dust-containing gas passes through a space between a plurality of basic dust collectors or a space between roll-type basic dust collectors to perform dust collection, and as a result, dust can be collected while the use of power supplied to a DC power supply unit from an external power supply is minimized, and further, dust collection efficiency can be increased by a concentration and distortion phenomenon at a portion where the first electrode forming a predetermined pattern is formed in the basic dust collector.

The present invention relates to an electrical dust collection device comprising: a charging part for applying charges to dust particles introduced from the outside; a dust collection part for collecting, by electric attraction, the dust particles charged by the charging part, wherein the charging part uses a first charging plate and a second charging plate, in parallel, in the movement direction of dust, thereby increasing an assembly property and further increasing dust collecting efficiency through stable charging, and the dust collection part comprises a first connection portion that continues at one side of a plurality of first dust collection plates, thereby increasing productivity and dust collecting performance.

The present invention relates to an electrical dust collection device comprising: a charging part for applying charges to dust particles introduced from the outside; a dust collection part for collecting, by electric attraction, the dust particles charged by the charging part, wherein the charging part uses a first charging plate and a second charging plate, in parallel, in the movement direction of dust, thereby increasing an assembly property and further increasing dust collecting efficiency through stable charging, and the dust collection part comprises a first connection portion that continues at one side of a plurality of first dust collection plates, thereby increasing productivity and dust collecting performance.

An ion generator, a fan coil unit and an air conditioning system. The ion generator includes: a power module; a negative plate connected to the power module; a ground plate spaced apart from a first side of the negative plate, the first side of the negative plate includes a plurality of plasma needles extending toward the ground plate; a positive plate spaced apart from a second side of the negative plate, the positive plate is connected to the power module and has a polarity opposite to that of the negative plate, and the respective sides of the negative plate and the positive plate that are facing toward each other are respectively provided with a plurality of carbon fiber brushes at corresponding positions.

An air filtering device is provided, including: a plurality of metal nets, arranged in interval in a filtering path, respectively connected to a pole of at least one high-voltage power source to provide electric fields, adjacent two of the plurality of metal nets having opposite polarities; wherein at least one of the plurality of metal nets is of an electric characteristic which is time-variant relative to a constant reference level so that the electric field of the at least one of the plurality of metal nets is time-variant.