# US 12,766,451 B2 · Air cleaning system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,766,451 B2 - Document ID: US12766451B2 - Status: Granted - Kind: B2 - Application number: 18/664,032 - Filed: 2024-05-14 - Published: 2024-09-12 - Granted: 2026-10-20 - Earliest claimed: 2020-09-21 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Ji Eun Choi; Hyungho Park; Jinhee Noh; Dongryul Park; Seongman Jang - Web page: https://patentgrep.com/patent/US12766451B2 ## CPC - B01D 46/0049: {containing fixed gas displacement elements or cores} - B01D 46/0047: {for discharging the filtered gas} - B01D 46/0084: {provided with safety means} - B01D 46/24: Particle separators, e.g. dust precipitators, using rigid hollow filter bodies - B01D 46/429: {Means for wireless communication} - B01D 46/442: {by measuring the concentration of particles} - B01D 46/46: automatic - B01D 46/56: with multiple filtering elements, characterised by their mutual disposition (B01D46/12 takes precedence) - F24F 8/108: using dry filter elements - F24F 11/526: giving audible indications - F24F 11/64: using pre-stored data - F24F 11/79: for controlling the direction of the supplied air - F24F 13/10: movable, e.g. dampers - B01D 2273/30: Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan - B01D 2279/51: in clean rooms, e.g. production facilities for electronic devices, laboratories - F24F 8/80: Self-contained air purifiers - F24F 13/082: {Grilles, registers or guards} - F24F 2013/205: {Mounting a ventilator fan therein} - F24F 2110/64: Airborne particle content - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) ## Abstract An air cleaning system can rapidly senses occurrence of local pollution, caused by fine dust, through a remote sensor hub and supplies purified air to a polluted area in a concentrated manner, thereby quickly purifying indoor air. ## Claims ### Claim 1 An air cleaning system, comprising: a first purifier including a first case, a first suction portion disposed at the first case, and a first discharge portion for discharging a purified air upward; a second purifier disposed over the first purifier, the second purifier including a second case, a second suction portion disposed at the second case, and a second discharge portion for discharging a purified air upward; a first circulator disposed at the first discharge portion and configured to discharge the purified air from the first discharge portion and to rotate over a first angle of rotation in a left-right direction; and a second circulator disposed at the second discharge portion and configured to discharge the purified air from the second discharge portion and to rotate over a second angle of rotation in the left-right direction, wherein the first circulator and the second circulator are positioned at different heights in a vertical direction, and the first circulator and the second circulator are configured to rotate independently in the left-right direction. ### Claim 2 (depends on 1) The air cleaning system of claim 1, wherein the first angle of rotation and the second angle of rotation overlap to provide a more intense airflow than provided by either of the first circulator and the second circulator separately. ### Claim 3 (depends on 2) The air cleaning system of claim 2, wherein the first and second circulator are configured to discharge the purified air in a fixed same direction in the intense airflow. ### Claim 4 (depends on 1) The air cleaning system of claim 1, wherein the first circulator comprises an outer circumferential wall, an inner circumferential wall disposed inside the outer circumferential wall, and a plurality of vanes connecting the outer circumferential wall and the inner circumferential wall, the plurality of vanes being spaced apart at regular intervals and arranged in parallel. ### Claim 5 (depends on 4) The air cleaning system of claim 4, further comprising a partition disposed between a lower portion of the second purifier and an upper portion of the first purifier, the partition being configured to support the second purifier, wherein the partition extends radially to radially guide the purified air from the first purifier, and wherein the first circulator is rotatably disposed below the partition, the first circulator being configured to guide directionally the purified air from the first purifier. ### Claim 6 (depends on 5) The air cleaning system of claim 5, wherein the second circulator is disposed at an upper portion of the second purifier, the second circulator being further configured to rotate in an up and down direction. ### Claim 7 (depends on 1) The air cleaning system of claim 1, wherein the first circulator and the second circulator are configured to generate a dispersed airflow for discharging the purified air toward different directions, respectively. ### Claim 8 (depends on 7) The air cleaning system of claim 7, wherein the dispersed airflow includes a first dispersed airflow, a second dispersed airflow, and a third dispersed airflow, and wherein, in the first dispersed airflow, the first circulator and the second circulator are configured to discharge the purified air toward the different directions, respectively, without left-right rotation during the discharging, and wherein, in the second dispersed airflow, any one of the first circulator and the second circulator is configured to discharge the purified air without the left-right rotation while another of the first circulator and the second circulator is configured to rotate in the left-right direction, and wherein, in the third dispersed airflow, the first circulator and the second circulator are configured to rotate in the left-right direction, respectively. ### Claim 9 (depends on 8) The air cleaning system of claim 8, further comprising a first sensor hub and a second sensor hub spaced apart from the first purifier and the second purifier, the first sensor hub and the second sensor hub being configured to sense pollution in a first corresponding area and a second corresponding area, respectively, wherein, when sensed pollution degrees from each of the first sensor hub and the second sensor hub are greater than a predetermined reference value, the first circulator and the second circulator are configured to generate the dispersed airflow, and wherein, when the dispersed airflow is the second dispersed airflow, any one of the first circulator and the second circulator is configured to discharge the purified air toward the first sensor hub without the left-right rotation while another of the first circulator and the second circulator is configured to rotate with respect to the second sensor hub or to rotate between the first sensor hub and the second sensor hub. ### Claim 10 (depends on 9) The air cleaning system of claim 9, further comprising a third sensor hub spaced apart from the first sensor hub and the second sensor hub, the third sensor hub being configured to sense pollution in a third corresponding area, and wherein, when the dispersed airflow is the second dispersed airflow, the another of the first circulator and the second circulator is configured to rotate between the first sensor hub and an outmost sensor hub among the second sensor hub and the third sensor hub. ### Claim 11 (depends on 7) The air cleaning system of claim 7, further comprising a plurality of sensor hubs spaced apart from the first purifier and the second purifier, the plurality of sensor hubs being configured to sense pollution in corresponding areas of the plurality of sensor hubs, respectively, and wherein the first circulator is configured to discharge the purified air toward a furthest sensor hub among the plurality of sensor hubs while the second circulator is configured to discharge the purified air toward remaining sensor hubs among the plurality of sensor hubs. ### Claim 12 (depends on 7) The air cleaning system of claim 7, further comprising a plurality of sensor hubs spaced apart from the first purifier and the second purifier, the plurality of sensor hubs being configured to sense pollution in corresponding areas, respectively, wherein, when a sensed pollution degree from any one of the plurality of sensor hubs is greater than a reference value, the first circulator and the second circulator are configured to generate an overlapping airflow, and wherein, when two or more sensed pollution degrees from the plurality of sensor hubs are greater than the reference value, the first circulator and the second circulator are configured to generate the dispersed airflow. ### Claim 13 (depends on 12) The air cleaning system of claim 12, wherein the reference value is a predetermined reference value or a sensed pollution degree from a main sensor provided at one of the first purifier and the second purifier. ### Claim 14 (depends on 13) The air cleaning system of claim 13, wherein, when two sensed pollution degrees from the plurality of sensor hubs are greater than the reference value, the first circulator and the second circulator are configured to discharge the purified air toward corresponding sensor hubs, respectively, without the left-right rotation. ### Claim 15 (depends on 14) The air cleaning system of claim 14, wherein the first circulator is configured to discharge the purified air towards a long-distanced sensor hub of the plurality of sensor hubs without the left-right rotation while the second circulator is configured to discharge the purified air toward a short-distanced sensor hub of the plurality of sensor hubs without the left and right rotation. ### Claim 16 (depends on 13) The air cleaning system of claim 13, wherein, when two sensed pollution degrees from the plurality of sensor hubs are greater than the reference value, any one of the first circulator and the second circulator is configured to discharge the purified air without the left-right rotation while another of the first circulator and the second circulator is configured to rotate in the left-right direction. ### Claim 17 (depends on 13) The air cleaning system of claim 13, wherein, when three sensed pollution degrees from the plurality of sensor hubs are greater than the reference value, the first circulator and the second circulator are configured to rotate in the left-right direction. ### Claim 18 (depends on 1) The air cleaning system of claim 1, further comprising a plurality of sensor hubs spaced apart from the first purifier and the second purifier, the plurality of sensor hubs being configured to sense pollution in corresponding areas of the plurality of sensor hubs, respectively, wherein, when a sensed pollution degree from any one of the plurality of sensor hubs reaches a predetermined cooking pollution degree or a change in sensed pollution degree from any one of the plurality of sensor hubs is greater than a reference value, the first circulator and the second circulator are configured to discharge the purified air toward the any one of the plurality of sensor hubs. ### Claim 19 (depends on 1) The air cleaning system of claim 1, further comprising a plurality of sensor hubs spaced apart from the first purifier and the second purifier, the plurality of sensor hubs being configured to sense pollution in corresponding areas, respectively, wherein one of the plurality of sensor hubs is disposed at a cooking area, and wherein the first circulator and the second circulator are configured to discharge the purified air toward the cooking area. ### Claim 20 An air cleaning system, comprising: a first purifier including a first case, a first suction portion disposed at the first case, and a first discharge portion for discharging a purified air upward; a second purifier disposed over the first purifier, the second purifier including a second case, a second suction portion disposed at the second case, and a second discharge portion for discharging a purified air upward; a first circulator disposed at the first discharge portion and configured to discharge the purified air from the first discharge portion and to rotate over a first angle of rotation in a left-right direction; and a second circulator disposed at the second discharge portion and configured to discharge the purified air from the second discharge portion and to rotate over a second angle of rotation in the left-right direction, wherein the first circulator and the second circulator are positioned at different heights in a vertical direction, and the first circulator and the second circulator are configured to rotate independently in the left-right direction, and wherein at least one of the first circulator and the second circulator comprises an outer circumferential wall, an inner circumferential wall disposed inside the outer circumferential wall, and a plurality of vanes connecting the outer circumferential wall and the inner circumferential wall, the plurality of vanes being spaced apart at regular intervals and arranged in parallel. ### Claim 21 (depends on 20) The air cleaning system of claim 20, wherein the plurality of vanes are extended vertically, and wherein at least a part of each of the plurality of vanes are inclined in a same direction. ### Claim 22 (depends on 20) The air cleaning system of claim 20, further comprising a plurality of sensor hubs spaced apart from the first purifier and the second purifier, the plurality of sensor hubs being configured to sense pollution in corresponding areas, respectively, wherein the first circulator and the second circulator are configured to discharge the purified air toward one of the plurality of sensor hubs for a same directional airflow to perform an intensive control, and the first circulator and the second circulator are configured to rotate respectively toward different sensor hubs among the plurality of sensor hubs to perform a disperse control. ### Claim 23 (depends on 20) The air cleaning system of claim 20, further comprising: a plurality of sensor hubs spaced apart from the first purifier and the second purifier, the plurality of sensor hubs being configured to sense pollution in corresponding areas, respectively; and a main sensor provided at one of the first purifier and the second purifier, the main sensor being configured to sense pollution at the one of the first purifier and the second purifier, and wherein, when all sensed pollution degrees from the plurality of sensor hubs is greater than a sensed pollution degree of the main sensor, the first circulator and the second circulator are configured to rotate with rotation ranges of the first and second angles, respectively. ### Claim 24 (depends on 23) The air cleaning system of claim 23, wherein, when the sensed pollution degree of the main sensor is greater than all sensed pollution degrees from the plurality of sensor hubs, the first purifier and the second purifier are configured to discharge the purified air without a left-right rotation. ### Claim 25 An air cleaning system, comprising: a first purifier including a first case, a first suction portion disposed at the first case, and a first discharge portion for discharging a purified air upward; a second purifier disposed over the first purifier, the second purifier including a second case, a second suction portion disposed at the second case, and a second discharge portion for discharging a purified air upward; a first circulator disposed at the first discharge portion and configured to discharge the purified air from the first discharge portion; and a second circulator disposed at the second discharge portion and configured to discharge the purified air from the second discharge portion, a plurality of sensor hubs spaced apart from the first purifier and the second purifier, the plurality of sensor hubs being configured to sense pollution in corresponding areas, respectively, wherein the first circulator and the second circulator are positioned at different heights in a vertical direction, and the first circulator and the second circulator are configured to rotate independently in a left-right direction, and wherein the first circulator and the second circulator are configured to discharge the purified air fixedly toward one of the plurality of sensor hubs for a same directional airflow to perform an intensive control, and the first circulator and the second circulator are configured to rotate respectively toward different sensor hubs among the plurality of sensor hubs to perform a disperse control.