Electrostatic precipitator and control method thereof
An electrostatic precipitator includes a dust collecting sheet configured to emit ions and configured to collect an aerosol charged by the ions, a power supplier electrically connected to the dust collecting sheet, a plate-shaped structure arranged upstream of an air flow path rather than the dust collecting sheet, and including at least one of a filter mesh or a grille including a plurality of openings, a potential stabilizer arranged between the plate-shaped structure and a ground, and configured to stabilize a potential of the plate-shaped structure, and a controller configured to control the power supplier to supply power to the dust collecting sheet.
1 . An electrostatic precipitator comprising:
a dust collecting sheet configured to emit ions and configured to collect an aerosol charged by the ions from air flowing along an air flow path through the electrostatic precipitator;
a power supplier electrically connectable to the dust collecting sheet;
a plate-shaped structure arranged upstream of the dust collecting sheet along the air flow path, the plate-shaped structure comprising at least one of a filter mesh or a grille comprising a plurality of openings;
a potential stabilizer, arranged between the plate-shaped structure and a ground, to stabilize a potential of the plate-shaped structure, the potential stabilizer including a relay configured to connect to and disconnect from the plate-shaped structure and the ground; and
a controller configured to control the relay to be repeatedly turned on and off at predetermined time intervals so that the plate-shaped structure and the ground are repeatedly connected and disconnected at the predetermined time intervals based on the power supplier supplying power to the dust collecting sheet.
2 . The electrostatic precipitator of claim 1 , wherein
the controller is configured to set a closing time of the relay during which the relay is closed to be less than an opening time of the relay during which the relay is opened.
3 . The electrostatic precipitator of claim 1 wherein
the potential stabilizer further comprises a resistor-capacitor (RC) circuit connectable to the plate-shaped structure and connectable in parallel to the relay.
4 . The electrostatic precipitator of claim 1 , wherein
the potential stabilizer comprises a resistance element.
5 . The electrostatic precipitator of claim 1 , wherein
the plate-shaped structure is formed of a conductive material.
6 . The electrostatic precipitator of claim 1 , wherein
the plate-shaped structure is formed of a semi-conductive material having a uniform resistance, or the plate-shaped structure comprises a first member formed of an insulator and a second member formed of a conductive material or a semi-conductive material.
7 . The electrostatic precipitator of claim 6 , further comprising:
a conductive member arranged on at least a portion of a rim of the plate-shaped structure.
8 . The electrostatic precipitator of claim 7 , wherein
the conductive member having a bent shape to surround the rim of the plate-shaped structure.
9 . The electrostatic precipitator of claim 7 , wherein
the conductive member is formed between the filter mesh and the grille.
10 . The electrostatic precipitator of claim 7 , wherein
the plate-shaped structure is formed in a quadrangle,
wherein the conductive member is arranged on a first side of the plate-shaped structure and a second side of the plate-shaped structure facing the first side symmetrically.
11 . The electrostatic precipitator of claim 7 , wherein
the plate-shaped structure is formed in a quadrangle,
wherein the conductive member comprises a first conductive member arranged adjacent to a first vertex of the plate-shaped structure and a second conductive member arranged adjacent to a second vertex of the plate-shaped structure arranged diagonally with respect to the first vertex,
wherein a first length of the first conductive member and a second length of the second conductive member are less than a length of one side of the plate-shaped structure.
12 . The electrostatic precipitator of claim 7 , further comprising:
an insulating member arranged outside the conductive member to cover the conductive member.
13 . The electrostatic precipitator of claim 1 , wherein the dust collecting sheet comprises:
a plurality of high-voltage electrodes comprising a first dielectric layer and a first conductive electrode layer in which a part thereof is exposed to an outside through an opening of the first dielectric layer, the plurality of high-voltage electrodes to which a high-voltage is applied; and
a plurality of low-voltage electrodes comprising a second dielectric layer and a second conductive electrode layer provided inside of the second dielectric layer, the plurality of low-voltage electrodes alternately arranged with the plurality of high-voltage electrodes, and to which a low-voltage is applied.
14 . A control method of an electrostatic precipitator comprising a dust collecting sheet configured to collect an aerosol charged ions from air flowing along an air flow path through the electrostatic precipitator and a filter assembly arranged upstream of the dust collecting sheet along the air flow path, the control method comprising:
controlling a power supplier to supply power to the dust collecting sheet;
opening a relay of a potential stabilizer arranged between the filter assembly and a ground based on the power being supplied to the dust collecting sheet, the relay being configured to connect to and disconnect from the filter assembly and the ground; and
controlling the relay to be repeatedly turned on and off at predetermined time intervals so that the plate-shaped structure and the ground are repeatedly connected and disconnected at the predetermined time intervals based on the power supplier supplying power to the dust collecting sheet.