# US 2023/0263221 A1 · Aerosol-generating device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0263221 A1 - Document ID: US20230263221A1 - Status: Published application - Kind: A1 - Application number: 18/004,159 - Filed: 2021-11-22 - Published: 2023-08-24 - Earliest claimed: 2020-11-24 - Assignees: Kt&G Corporation - Applicants: Kt&G Corporation - Inventors: Jongsub LEE; Minkyu KIM; Jueon PARK; Byungsung CHO; Namhyeong KIM - Web page: https://patentgrep.com/patent/US20230263221A1 ## CPC - A24F 40/40: Constructional details, e.g. connection of cartridges and battery parts - A24F 40/44: Wicks - A24F 40/10: Devices using liquid inhalable precursors - A24F 40/30: Devices using two or more structurally separated inhalable precursors, e.g. using two liquid precursors in two cartridges - A24F 40/42: Cartridges or containers for inhalable precursors - A24F 40/46: Shape or structure of electric heating means - A24F 40/485: Valves; Apertures - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) ## Abstract An aerosol-generating device is disclosed. The aerosol-generating device includes: a cartridge including a first container, a wick disposed in the first container, the wick including an evaporation passage, a cylindrical outer portion surrounding the evaporation passage, an inner portion, which protrude toward the evaporation passage from the outer portion and extends in the longitudinal direction of the outer portion, and a groove, which is recessed from the inner portion and extends in the longitudinal direction of the outer portion, and a heater disposed in the wick, the heater including a first portion disposed between the outer portion and the inner portion and a second portion exposed through the groove; and a housing having a reception space into which the cartridge is inserted. ## Claims ### Claim 1 A cartridge comprising: a first container; a wick disposed in the first container and elongated with a hollow cavity; and a heater disposed between an inner surface and an outer surface of the wick, wherein the wick has: an evaporation passage defined by the inner surface of the wick; and a groove recessed from the inner surface of the wick to expose the heater to an interior of the wick. ### Claim 2 (depends on 1) The cartridge according to claim 1, wherein the groove extends in a longitudinal direction of the wick. ### Claim 3 (depends on 1) The cartridge according to claim 1, wherein a plurality of grooves, which are recessed from the inner surface of the wick, are spaced apart from each other along a circumference of the inner surface of the wick. ### Claim 4 (depends on 1) The cartridge according to claim 1, wherein the wick has a shape of a hollow cylinder. ### Claim 5 (depends on 1) The cartridge according to claim 1, wherein the wick comprises a porous ceramic. ### Claim 6 (depends on 1) The cartridge according to claim 1, wherein the heater includes a coil, and wherein the coil has a spiral shape to surround the evaporation passage, and extends in a longitudinal direction of the wick. ### Claim 7 (depends on 6) The cartridge according to claim 6, wherein the coil is disposed adjacent to an outlet of the evaporation passage. ### Claim 8 (depends on 6) The cartridge according to claim 6, wherein the coil extends from a position adjacent to an inlet of the evaporation passage to a position adjacent to an outlet of the evaporation passage in the longitudinal direction of the wick via an intermediate position of the wick. ### Claim 9 (depends on 1) The cartridge according to claim 1, wherein the cartridge has an inlet that communicates with an exterior of the first container, and wherein the cartridge further comprises a partition partitioning an internal space in the first container into a liquid chamber configured to receive a liquid and an air chamber connected to the inlet. ### Claim 10 (depends on 9) The cartridge according to claim 9, further comprising: a wick housing having a space configured to receive the wick, wherein the wick housing has an introduction inlet that allows the space configured to receive the wick to communicate with the liquid chamber. ### Claim 11 (depends on 10) The cartridge according to claim 10, wherein the partition has an upper surface defining a lower end of the liquid chamber, wherein the upper surface is connected to the introduction inlet and inclined downwards toward the introduction inlet. ### Claim 12 (depends on 9) The cartridge according to claim 9, further comprising: a support disposed below the wick, and wherein the support has an inlet passage passing therethrough that allows the air chamber to communicate with the evaporation passage. ### Claim 13 (depends on 1) The cartridge according to claim 1, further comprising: a cylinder elongated and defining an appearance of the first container; and a first cap disposed at a first open end of the cylinder, wherein the first cap has a discharge passage passing therethrough and connected to the evaporation passage. ### Claim 14 (depends on 13) The cartridge according to claim 13, further comprising: a second cap disposed at a second open end of the cylinder, wherein the second cap has an inlet passing therethrough and spaced apart from the evaporation passage along a radius of the cylinder. ### Claim 15 (depends on 14) The cartridge according to claim 14, further comprising an extension protruding toward the first cap from the second cap and surrounding the inlet. ### Claim 16 (depends on 1) The cartridge according to claim 1, further comprising: a second container having a cylindrical shape, wherein the second container is rotatably coupled to the first container and has a plurality of chambers separated from each other along a circumference of the second container, each of the chambers having a plurality of holes at an upper end and a lower end thereof; and a duct positioned between the first container and the second container to allow the evaporation passage to communicate with one of the plurality of chambers. ### Claim 17 (depends on 16) The cartridge according to claim 16, further comprising: a container head facing the first container with the second container interposed therebetween, wherein the container head is rotatably coupled to the second container and has an outlet; and a disc positioned between the second container and the container head, wherein the disc has a disc hole that allows the plurality of holes at the upper end of the one of the plurality of chambers of the second container to communicate with the outlet. ### Claim 18 (depends on 1) An aerosol-generating device comprising: the cartridge of claim 1; and a housing having a reception space into which the cartridge is inserted.