US 12,220,709 B2
Electrification apparatus for electric dust collection and control method therefor
Namgyu Shin, Seoul (KR); Naehyun Park, Seoul (KR); Hyunmin Shim, Seoul (KR); and Keonwang Lee, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Oct. 4, 2021, as Appl. No. 17/493,076.
Application 17/493,076 is a continuation of application No. 16/049,517, filed on Jul. 30, 2018, granted, now 11,198,138.
Claims priority of application No. 10-2018-0085533 (KR), filed on Jul. 23, 2018.
Prior Publication US 2022/0023883 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B03C 3/68 (2006.01); B03C 3/09 (2006.01); B03C 3/38 (2006.01); B03C 3/47 (2006.01); B03C 3/60 (2006.01); B60H 3/00 (2006.01)
CPC B03C 3/68 (2013.01) [B03C 3/09 (2013.01); B03C 3/38 (2013.01); B03C 3/47 (2013.01); B03C 3/60 (2013.01); B60H 3/0078 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electrification apparatus for electric dust collection, the electrification apparatus comprising:
a frame;
a conductive microfiber disposed at the frame and configured to discharge an electric charge to air to thereby generate ions in the air;
conductive plates that surround the conductive microfiber, that are connected to a ground electrode, and that are configured to generate a potential difference with the conductive microfiber;
a ground connector that is disposed between the conductive microfiber and one of the conductive plates and that is configured to selectively connect to the ground electrode;
a voltage generator configured to generate a voltage corresponding to the electric charge and to supply the voltage to the conductive microfiber; and
a plurality of switches connected to at least one of the voltage generator or the ground electrode,
wherein the plurality of switches comprise:
a first switch connected to the voltage generator, and
a second switch, a third switch, and a fourth switch that are connected to the ground electrode, and
wherein the conductive microfiber is configured to:
discharge the electric charge to the air based on the first and third switches being turned on and the second and fourth switches being turned off, and
stop discharging the electric charge to the air based on the first and second switches being turned off and the third and fourth switches being turned on.