# US 11,898,777 B2 · Air cleaner > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,898,777 B2 - Document ID: US11898777B2 - Status: Granted - Kind: B2 - Application number: 17/540,325 - Filed: 2021-12-02 - Published: 2022-06-16 - Granted: 2024-02-13 - Earliest claimed: 2020-12-14 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Sangjin Park; Dooyeong Kwak; Naehyun Park - Web page: https://patentgrep.com/patent/US11898777B2 ## CPC - F24F 8/22: using UV light - B01D 46/0002: {Casings; Housings; Frame constructions} - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B01D 46/0027: {with additional separating or treating functions} - F24F 8/10: by separation, e.g. by filtering - F24F 8/108: using dry filter elements - F24F 8/80: Self-contained air purifiers - F24F 13/28: Arrangement or mounting of filters - F24F 2013/205: {Mounting a ventilator fan therein} - F24F 2110/64: Airborne particle content - F24F 2221/36: Modules, e.g. for an easy mounting or transport - 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) - 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) ## Abstract An air cleaner may include a housing including a first housing having a discharge outlet through which air is discharged outside of the air cleaner, and a second housing including a suction inlet through which air is suctioned from outside of the air cleaner, and a filter assembly accommodated inside of the housing and that filters air. The first housing and the second housing may be spaced apart from each other, and the filter assembly may be replaceable through a space between the first housing and the second housing. ## Claims ### Claim 1 An air cleaner, comprising: a housing including a suction inlet through which air is suctioned from outside of the air cleaner and a discharge outlet through which air is discharged outside of the air cleaner; a flow converter disposed on a top surface of the housing that changes a flow direction of air; a guide that guides a direction of the flow converter; a sterilizer that sterilizes air suctioned into the air cleaner; a filter assembly that filters the air suctioned into the air cleaner; a blower that blows air; a dust sensor assembly that senses an amount of dust contained in the air suctioned into the air cleaner; a battery that supplies power; a frame disposed inside of the housing that accommodates the sterilizer, the filter assembly, the blower, the dust sensor assembly, and the battery therein; and an inner housing interposed between the housing and the frame, wherein a first portion of the inner housing is fixed to the housing, and a second portion thereof is slidably coupled to the frame, and wherein the frame is configured to move in the housing in a first direction to be closer to the flow converter or in a second direction away from the flow converter by sliding of the inner housing. ### Claim 2 (depends on 1) The air cleaner of claim 1, wherein the frame includes: a first frame that accommodates the blower therein; and a second frame coupled to the first frame and that accommodates the sterilizer, the filter assembly, the dust sensor assembly, and the battery therein, wherein the second frame includes: an upper frame that accommodates the filter assembly and the sterilizer therein; and a lower frame that accommodates the dust sensor assembly and the battery therein, wherein the inner housing is slidably coupled to an outer wall of the lower frame. ### Claim 3 (depends on 2) The air cleaner of claim 2, wherein the housing includes: a first housing that covers the first frame; and a second housing that covers at least a portion of the second frame, wherein the first housing and the second housing are spaced apart from each other as the inner housing slides with respect to the outer wall of the lower frame. ### Claim 4 (depends on 3) The air cleaner of claim 3, wherein the first housing is configured to ascend from the second housing along the first direction or descend toward the second housing along the second direction together with the first frame and the second frame. ### Claim 5 (depends on 4) The air cleaner of claim 4, wherein the filter assembly accommodated in the upper frame is exposed to the outside through a space defined between the first housing and the second housing to be replaced when the second frame ascends along the first direction. ### Claim 6 (depends on 4) The air cleaner of claim 4, wherein the filter assembly is covered by the second housing so as not to be exposed to the outside when the second frame descends along the second direction. ### Claim 7 (depends on 3) The air cleaner of claim 3, wherein the lower frame includes a sliding groove defined in the outer wall of the lower frame, and wherein the inner housing includes a sliding portion configured to be movable along the sliding groove. ### Claim 8 (depends on 7) The air cleaner of claim 7, wherein the sliding groove includes: a first sliding groove that extends along a circumferential direction of the lower frame; and a second sliding groove that extends along the first direction or the second direction, wherein a first end of the first sliding groove is connected to a first end of the second sliding groove, so that the first sliding groove and the second sliding groove are in communication with each other. ### Claim 9 (depends on 8) The air cleaner of claim 8, wherein the sliding groove further includes a third sliding groove that extends along the circumferential direction and spaced apart from the first sliding groove, wherein a first end of the third sliding groove is connected to a second end of the second sliding groove, so that the third sliding groove and the second sliding groove are in communication with each other. ### Claim 10 (depends on 9) The air cleaner of claim 9, wherein an extension length of the first sliding groove and an extension length of the third sliding groove are different from each other. ### Claim 11 (depends on 9) The air cleaner of claim 9, wherein the lower frame is configured to be rotatable in a clockwise direction or in a counterclockwise direction with respect to the second housing when the sliding portion moves along the first sliding groove or the third sliding groove, and wherein the lower frame is configured to ascend from the second housing along the first direction or descend toward the second housing along the second direction when the sliding portion moves along the second sliding groove. ### Claim 12 (depends on 9) The air cleaner of claim 9, wherein the lower frame further includes a sliding fastening groove defined in the outer wall of the second lower frame, and wherein the inner housing further includes a sliding fastening portion configured to be fastened to the sliding fastening groove. ### Claim 13 (depends on 12) The air cleaner of claim 12, wherein the sliding portion and the sliding fastening portion are disposed to be in parallel with each other. ### Claim 14 (depends on 12) The air cleaner of claim 12, wherein the sliding fastening groove includes: a first sliding fastening groove defined at an upper portion of the outer wall of the lower frame; and a second sliding fastening groove defined at a lower portion of the outer wall of the lower frame, wherein the lower frame is prevented from rotating in a clockwise direction or in a counterclockwise direction with respect to the second housing as the sliding fastening portion is fastened to the first sliding fastening groove or the second sliding fastening groove. ### Claim 15 (depends on 14) The air cleaner of claim 14, wherein at least a portion of the first sliding fastening groove is disposed to be in parallel with the first sliding groove, and wherein at least a portion of the second sliding fastening groove is disposed to be in parallel with the third sliding groove. ### Claim 16 (depends on 14) The air cleaner of claim 14, wherein the filter assembly is fixed in a state of being exposed to the outside through a space defined between the first housing and the second housing when the sliding fastening portion is fastened to the second sliding fastening groove, and wherein the filter assembly is fixed in a state of being covered by the second housing and not exposed to the outside when the sliding fastening portion is fastened to the first sliding fastening groove. ### Claim 17 An air cleaner, comprising: a housing including a suction inlet through which air is suctioned from outside of the air cleaner and a discharge outlet through which air is discharged outside of the air cleaner; a flow converter disposed on a top surface of the housing that changes a flow direction of air; a guide that guides a direction of the flow converter; a sterilizer that sterilizes air suctioned into the air cleaner; a filter assembly that filters the air suctioned into the air cleaner; a blower that blows air; a dust sensor assembly that senses an amount of dust contained in the air suctioned into the air cleaner; a battery that supplies power; a first frame disposed inside of the housing that accommodates the blower therein; a second frame disposed inside of the housing and beneath the first frame, wherein the second frame accommodates the sterilizer, the filter assembly, the dust sensor assembly, and the battery therein; and an inner housing interposed between the housing and the second frame, wherein a first portion of the inner housing is fixed to the housing, and a second portion thereof is slidably coupled to the second frame, wherein the housing includes a first housing that covers the first frame, and a second housing that covers at least a portion of the second frame, wherein the second frame includes a sliding groove defined to penetrate an outer wall of the second frame, wherein the inner housing includes a sliding portion configured to be movable along the sliding groove, wherein the inner housing is configured to be slidable with respect to the second frame as the sliding portion moves along the sliding groove, wherein the second frame further includes a first sliding fastening groove and a second sliding fastening groove defined at different positions of the outer wall of the second frame, and wherein the inner housing further includes a sliding fastening portion capable of being selectively fastened to the first sliding fastening groove or the second sliding fastening groove. ### Claim 18 (depends on 17) The air cleaner of claim 17, wherein the second frame further includes a first dust sensor cleaning hole that penetrates a sidewall of the second frame to partially expose the dust sensor assembly accommodated in the second frame, wherein the inner housing further includes a second dust sensor cleaning hole that penetrates a sidewall of the inner housing, wherein the second housing includes a third dust sensor cleaning hole that penetrates a sidewall of the second housing, and wherein the first dust sensor cleaning hole, the second dust sensor cleaning hole, and the third dust sensor cleaning hole overlap each other in a state in which the sliding fastening portion is fastened to the first sliding fastening groove. ### Claim 19 (depends on 18) The air cleaner of claim 18, wherein the second housing further includes a fourth dust sensor cleaning hole that penetrates the sidewall of the second housing and spaced apart from the third dust sensor cleaning hole, and wherein the first dust sensor cleaning hole, the second dust sensor cleaning hole, and the fourth dust sensor cleaning hole overlap each other in a state in which the sliding fastening portion is fastened to the second sliding fastening groove. ### Claim 20 (depends on 19) The air cleaner of claim 19, wherein the fourth dust sensor cleaning hole is defined in a portion of the suction inlet. ### Claim 21 An air cleaner, comprising: a housing including a first housing having a suction inlet through which air is suctioned from outside of the air cleaner and a second housing having a discharge outlet through which air is discharged outside of the air cleaner; a flow converter disposed on a top surface of the housing that changes a flow direction of air; a guide that guides a direction of the flow converter; a sterilizer that sterilizes air suctioned into the air cleaner; a filter assembly that filters the air suctioned into the air cleaner; a blower that blows air; a dust sensor assembly that senses an amount of dust contained in the air suctioned into the air cleaner; a battery that supplies power; a frame disposed inside of the housing that accommodates the sterilizer, the filter assembly, the blower, the dust sensor assembly, and the battery therein; and an inner housing interposed between the housing and the frame and configured to slide with respect to the frame to provide access to the filter assembly when the first housing and the second housing are separated from one another.