An electrostatic dust collection apparatus and an air purifier including such the electrostatic dust collection apparatus are provided. The electrostatic dust collection apparatus of the invention includes a sheet collection electrode, an insulative bearing member and a plurality of discharge electrodes. A first surface of the sheet collection electrode faces and is parallel to a second surface of the insulative bearing member. A plurality of grooves are formed on and across the second surface of the insulative bearing member, and are parallel to one another. Each discharge electrode corresponds to one of the grooves, and is disposed in the corresponding groove. An air passage is defined between the sheet collection electrode and the insulative bearing member, and allows an air to be treated to pass through. The discharge electrodes charge a plurality of floating particles in the air to be treated. The sheet collection electrode collects the charged particles.

An electrostatic dust collection apparatus and an air purifier including such the electrostatic dust collection apparatus are provided. The electrostatic dust collection apparatus of the invention includes a sheet collection electrode, an insulative bearing member and a plurality of discharge electrodes. A first surface of the sheet collection electrode faces and is parallel to a second surface of the insulative bearing member. A plurality of grooves are formed on and across the second surface of the insulative bearing member, and are parallel to one another. Each discharge electrode corresponds to one of the grooves, and is disposed in the corresponding groove. An air passage is defined between the sheet collection electrode and the insulative bearing member, and allows an air to be treated to pass through. The discharge electrodes charge a plurality of floating particles in the air to be treated. The sheet collection electrode collects the charged particles.

An air filtration system includes a frame directing an airflow through the air filtration system and a media filter disposed in the frame including one or more filtration elements. The system further includes one or more alignment features and one or more sealing elements interactive with the one or more alignment features to prevent incorrect installation of the media filter into the frame. A method of installing a media filter in an air filtration system includes aligning an alignment feature of the media filter with an opening in a frame of the air filtration system and inserting the media filter into the frame. The alignment feature ensures that the media filter is inserted in the frame in a correct orientation.

An air filtration system includes a frame directing an airflow through the air filtration system and a media filter disposed in the frame including one or more filtration elements. The system further includes one or more alignment features and one or more sealing elements interactive with the one or more alignment features to prevent incorrect installation of the media filter into the frame. A method of installing a media filter in an air filtration system includes aligning an alignment feature of the media filter with an opening in a frame of the air filtration system and inserting the media filter into the frame. The alignment feature ensures that the media filter is inserted in the frame in a correct orientation.

A discharge device is housed in a housing portion of a holder. The discharge device includes a housed section and a discharge electrode protruding from the housed section. The housed section is housed in the housing portion. The housed section includes a bottom wall and two side walls. The two side walls oppose each other in a longitudinal direction of the bottom wall. At least one of the two side walls is connected to the bottom wall via a curved surface. The curved surface guides a corner of the housing portion when the housed section is housed in the housing portion. As a result, the housed section is housed in the housing portion without catching on the corner.

A discharge device is housed in a housing portion of a holder. The discharge device includes a housed section and a discharge electrode protruding from the housed section. The housed section is housed in the housing portion. The housed section includes a bottom wall and two side walls. The two side walls oppose each other in a longitudinal direction of the bottom wall. At least one of the two side walls is connected to the bottom wall via a curved surface. The curved surface guides a corner of the housing portion when the housed section is housed in the housing portion. As a result, the housed section is housed in the housing portion without catching on the corner.

A dust collector includes a casing, a fan, a filtering element, an electric field generator and an electrostatic precipitator. The casing includes an inlet, an outlet and a channel. The channel is arranged between the inlet and the outlet. An ambient airflow is introduced into the channel through the inlet by the fan. Moreover, portions of suspended particles in the airflow are filtered off by the filtering element. The electric field generator generates an electric field. The suspended particles passing through the electric field generator have a first electrical polarity. The electrostatic precipitator has a second electrical polarity, wherein the first electrical polarity and the second electrical polarity are opposite. The suspended particles with the first electrical polarity are adsorbed by the electrostatic precipitator.

A dust collector includes a casing, a fan, a filtering element, an electric field generator and an electrostatic precipitator. The casing includes an inlet, an outlet and a channel. The channel is arranged between the inlet and the outlet. An ambient airflow is introduced into the channel through the inlet by the fan. Moreover, portions of suspended particles in the airflow are filtered off by the filtering element. The electric field generator generates an electric field. The suspended particles passing through the electric field generator have a first electrical polarity. The electrostatic precipitator has a second electrical polarity, wherein the first electrical polarity and the second electrical polarity are opposite. The suspended particles with the first electrical polarity are adsorbed by the electrostatic precipitator.

Precipitator unit of a two-stage electro filter where air to be cleaned from electrically charged particles is intended to flow through the unit. Said unit comprising at least two cylindrical precipitators (10, 11) that each comprise at least two electrode elements arranged at a gap distance from each other. Each one of the precipitators (10, 11) is also intended to be connected to a high voltage source. The respective electrode elements of a precipitator (10, 11) are connected to different poles of the high voltage source. The main planes of the precipitators (10, 11) are axially spaced in the air flow direction and a cone shaped duct (21) extends between the circumference of the first precipitator (10) and a center opening (13) of the second precipitator (11). A first amount of polluted air flows across the area of the first precipitator (10) and continues afterwards through the inside of the cone shaped duct (21) and out of the unit through the center opening (13) of the second precipitator (11). A second amount of polluted air flows outside the circumference of both the first precipitator (10) and the cone shaped duct (21) in order to be cleaned by the second precipitator (11).

Precipitator unit of a two-stage electro filter where air to be cleaned from electrically charged particles is intended to flow through the unit. Said unit comprising at least two cylindrical precipitators (10, 11) that each comprise at least two electrode elements arranged at a gap distance from each other. Each one of the precipitators (10, 11) is also intended to be connected to a high voltage source. The respective electrode elements of a precipitator (10, 11) are connected to different poles of the high voltage source. The main planes of the precipitators (10, 11) are axially spaced in the air flow direction and a cone shaped duct (21) extends between the circumference of the first precipitator (10) and a center opening (13) of the second precipitator (11). A first amount of polluted air flows across the area of the first precipitator (10) and continues afterwards through the inside of the cone shaped duct (21) and out of the unit through the center opening (13) of the second precipitator (11). A second amount of polluted air flows outside the circumference of both the first precipitator (10) and the cone shaped duct (21) in order to be cleaned by the second precipitator (11).