WO2025135405A1 - Aerosol-generating device including heater - Google Patents

Abstract

This aerosol-generating device comprises: a chamber comprising a first storage means configured to hold an aerosol-generating material and a first external airflow channel configured to guide generated aerosol; a wick configured to deliver the aerosol-generating material from the chamber; and a heater configured to heat the aerosol-generating material, delivered from the wick, by surface plasmon resonance. The heater includes: a substrate including a first end portion, a second end portion opposite to the first end portion, and a side portion extending between the first end portion and the second end portion, the substrate including an outer surface and an inner surface opposite to the outer surface; a plurality of metal particles arranged on the inner surface; and an internal airflow channel configured to guide air along the outer surface from the second end portion toward the first end portion.

Description

Aerosol generating device including heater

The disclosure generally relates to an aerosol generating device, for example an aerosol generating device comprising a heater.

Technologies are being developed to introduce airflow into aerosol-generating articles to implement atomization performance. For example, an aerosol-generating device of a type that generates aerosol from an aerosol-generating article in a non-combustible manner is being developed. The background technology described above is something that was possessed or acquired during the process of deriving the present disclosure, and cannot necessarily be considered as a publicly known technology disclosed to the general public prior to the filing of the present disclosure.

One aspect of the disclosure can provide a space in which an aerosol can be generated. One aspect of the disclosure can provide an aerosol generating device including an aerosol generating device that increases the amount of aerosol generated from the wick.

An aerosol generating device may include a chamber comprising a first reservoir configured to hold an aerosol generating material and a first external airflow channel configured to guide the generated aerosol, a wick configured to deliver the aerosol generating material from the chamber, and a heater configured to heat the aerosol generating material delivered from the wick by surface plasmon resonance, wherein the heater comprises a substrate comprising a first end, a second end opposite the first end, and a side extending between the first end and the second end, the substrate comprising an exterior surface and an interior surface opposite the exterior surface, a plurality of metal particles disposed on the interior surface, and an interior airflow channel configured to guide air along the exterior surface in a direction from the second end toward the first end.

The above substrate further includes a groove formed on the side, and the internal airflow channel can be arranged in the groove.

The above groove can extend linearly along the outer surface.

The above groove may extend spirally along the outer surface.

The substrate further includes a plurality of grooves, internal airflow channels are arranged in the plurality of grooves, and the plurality of grooves can be substantially parallel to one another.

The above internal airflow channel can be formed on the outer surface of the substrate.

A mount is included that is disposed between the substrate and the wick, and the internal airflow channel can be disposed in the mount.

The wick may include a first wick portion facing the first storage and having a first thickness, and a second wick portion facing the first external airflow channel and having a second thickness less than the first thickness.

The chamber may include a second reservoir opposing the first reservoir, and a second external airflow channel defined between the first reservoir and the second reservoir and opposing the first external airflow channel.

The wick may include a third wick portion facing the second storage and having a third thickness, and a fourth wick portion facing the second external airflow channel and having a fourth thickness less than the third thickness.

The first wick portion, the second wick portion, the third wick portion and the fourth wick portion can be arranged in the circumferential direction of the substrate.

The above wick may include a ceramic material.

It may include a spacer disposed between the wick and the heater and separating the substrate and the wick.

The spacer includes a plurality of first longitudinal members extending in a first direction from the second end toward the first end, and a plurality of second longitudinal members extending in a second direction along the periphery of the substrate, wherein the plurality of first longitudinal members and the second longitudinal members can be intertwined with each other to form a plurality of voids.

The above spacer may include a thermal accelerator.

An aerosol generating device comprises a chamber comprising a first reservoir configured to hold an aerosol generating material and a first external airflow channel configured to guide the generated aerosol, a wick configured to deliver the aerosol generating material from the chamber, and a heater configured to heat the aerosol generating material delivered from the wick by surface plasmon resonance, wherein the heater comprises a substrate comprising a first end, a second end opposite the first end, and a side extending between the first end and the second end, the substrate comprising an exterior surface and an interior surface opposite the exterior surface, the substrate comprising a plurality of metal particles disposed on the interior surface, and the wick may comprise a first wick portion facing the first reservoir and having a first thickness, and a second wick portion facing the first external airflow channel and having a second thickness less than the first thickness.

An aerosol generating device comprises a chamber comprising a first reservoir configured to hold an aerosol generating material and a first external airflow channel configured to guide the generated aerosol, a wick configured to deliver the aerosol generating material from the chamber, and a heater configured to heat the aerosol generating material delivered from the wick by surface plasmon resonance, the heater comprising a substrate comprising a first end, a second end opposite the first end, and a side extending between the first end and the second end, the substrate comprising an exterior surface and an interior surface opposite the exterior surface, the substrate comprising a plurality of metal particles disposed on the interior surface, and a spacer disposed between the wick and the heater and separating the substrate and the wick.

In one embodiment, the amount of aerosol generated can be increased. In one embodiment, a space can be provided in which an aerosol can be generated. In one embodiment, the amount of aerosol generating material that changes phase at the wick can be increased. In one embodiment, the amount of heat generated from the heater and transferred to the wick can be increased. The effects of an aerosol generating device including a heater according to one embodiment are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

The above and other aspects, features and advantages of specific embodiments of the present disclosure will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

FIG. 1 is a block diagram of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 2 is a drawing illustrating an aerosol generating device according to one embodiment of the present disclosure.

FIG. 3 is a drawing illustrating an aerosol generating device according to another embodiment of the present disclosure.

FIG. 4 is a cross-sectional view of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 5 is an exploded cross-sectional view of a body and cartridge of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 6 is an exploded perspective view of a first container of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 7 is a bottom perspective view of a first container of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 8 is a cross-sectional view of a first container of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 9 is an exploded cross-sectional view of a first container and a second container of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 10 is a cross-sectional view of a joint of a first container and a second container of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 11 is a cross-sectional view illustrating an airflow channel of an aerosol generating device according to one embodiment of the present disclosure.

FIG. 12 is a cross-sectional drawing of an aerosol generating device according to one embodiment.

Figure 13 is a drawing showing a plane of an aerosol generating device according to one embodiment.

FIG. 14 is a drawing showing a cross-section of a heater according to one embodiment.

FIG. 15 is a cross-sectional drawing of an aerosol generating device according to one embodiment.

Figure 16 is a drawing showing a plane of an aerosol generating device according to one embodiment.

FIG. 17 is an exploded perspective view of a heater, a wick, and a spacer according to one embodiment.

FIG. 18 is a drawing showing a heater according to one embodiment.

FIG. 19 is a drawing showing a heater according to one embodiment.

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing symbols, identical or similar components will be given the same reference numerals and redundant descriptions thereof will be omitted.

The suffixes "module" and "part" used for components in the following description are given or used interchangeably only for the convenience of writing the specification, and do not have distinct meanings or roles in themselves.

In addition, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present disclosure.

Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another.

When it is said that a component is "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components in between. On the other hand, when it is said that a component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

FIG. 1 is a block diagram of an aerosol generating device (1) according to one embodiment of the present disclosure.

The aerosol generating device (1) may include a power source (11), a control unit (12), a sensor (13), an output unit (14), an input unit (15), a communication unit (16), a memory (17), and at least one heater (18, 24). However, the internal structure of the aerosol generating device (1) is not limited to that shown in Fig. 1. That is, a person having ordinary skill in the art related to the present embodiment will understand that some of the configurations shown in Fig. 1 may be omitted or new configurations may be added depending on the design of the aerosol generating device (1).

The sensor (13) can detect the status of the aerosol generating device (1) or the status around the aerosol generating device (1) and transmit the detected information to the control unit (12). Based on the detected information, the control unit (12) can control the aerosol generating device (1) so that various functions such as controlling the operation of the cartridge heater (24) and/or the heater (18), restricting smoking, determining whether a stick (S) and/or cartridge (19) is inserted, and displaying a notification are performed.

The sensor (13) may include at least one of a temperature sensor (131), a puff sensor (132), an insertion detection sensor (133), a reuse detection sensor (134), a cartridge detection sensor (135), a cap detection sensor (136), and a movement detection sensor (137).

The temperature sensor (131) can detect the temperature at which the cartridge heater (24) and/or the heater (18) is heated. The aerosol generating device (1) may include a separate temperature sensor that detects the temperature of the cartridge heater (24) and/or the heater (18), or the cartridge heater (24) and/or the heater (18) itself may serve as the temperature sensor.

The temperature sensor (131) can output a signal corresponding to the temperature of the cartridge heater (24) and/or the heater (18). For example, the temperature sensor (131) can include a resistance element whose resistance value changes in response to a change in the temperature of the cartridge heater (24) and/or the heater (18). It can be implemented by a thermistor, which is an element that utilizes the property of changing resistance depending on temperature. At this time, the temperature sensor (131) can output a signal corresponding to the resistance value of the resistance element as a signal corresponding to the temperature of the cartridge heater (24) and/or the heater (18). For example, the temperature sensor (131) can be configured as a sensor that detects the resistance value of the cartridge heater (24) and/or the heater (18). At this time, the temperature sensor (131) can output a signal corresponding to the resistance value of the cartridge heater (24) and/or the heater (18) as a signal corresponding to the temperature of the cartridge heater (24) and/or the heater (18).

The temperature sensor (131) may be placed around the power source (11) to monitor the temperature of the power source (11). The temperature sensor (131) may be placed adjacent to the power source (11). For example, the temperature sensor (131) may be attached to one side of a battery, which is the power source (11). For example, the temperature sensor (131) may be mounted on one side of a printed circuit board.

A temperature sensor (131) is placed inside the body (10) and can detect the internal temperature of the body (10).

The puff sensor (132) can detect the user's puff based on various physical changes in the airflow path. The puff sensor (132) can output a signal corresponding to the puff. For example, the puff sensor (132) can be a pressure sensor. The puff sensor (132) can output a signal corresponding to the internal pressure of the aerosol generating device. Here, the internal pressure of the aerosol generating device (1) can correspond to the pressure of the airflow path through which the gas flows. The puff sensor (132) can be arranged corresponding to the airflow path through which the gas flows in the aerosol generating device (1).

The insertion detection sensor (133) can detect insertion and/or removal of the stick (S). The insertion detection sensor (133) can detect a signal change according to the insertion and/or removal of the stick (S). The insertion detection sensor (133) can be installed around the insertion space. The insertion detection sensor (133) can detect the insertion and/or removal of the stick (S) according to a change in the dielectric constant inside the insertion space. For example, the insertion detection sensor (133) can be an inductive sensor and/or a capacitance sensor.

The inductive sensor may include at least one coil. The coil of the inductive sensor may be arranged adjacent to the insertion space. For example, when a magnetic field changes around a coil through which current flows, the characteristics of the current flowing in the coil may change according to Faraday's law of electromagnetic induction. Here, the characteristics of the current flowing in the coil may include the frequency of the alternating current, the current value, the voltage value, the inductance value, the impedance value, etc.

An inductive sensor can output a signal corresponding to the characteristics of the current flowing in the coil. For example, an inductive sensor can output a signal corresponding to the inductance value of the coil.

The capacitance sensor may include a conductor. The conductor of the capacitance sensor may be arranged adjacent to the insertion space. The capacitance sensor may output a signal corresponding to an electromagnetic characteristic of the surroundings, for example, an electrostatic capacitance of the surroundings of the conductor. For example, when a stick (S) including a wrapper made of a metal material is inserted into the insertion space, the electromagnetic characteristic of the surroundings of the conductor may be changed by the wrapper of the stick (S).

The reuse detection sensor (134) can detect whether the stick (S) is reused. The reuse detection sensor (134) can be a color sensor. The color sensor can detect the color of the stick (S). The color sensor can detect the color of a part of a wrapper that wraps the outside of the stick (S). The color sensor can detect a value for an optical characteristic corresponding to the color of an object based on light reflected from the object. For example, the optical characteristic can be a wavelength of light. The color sensor can be implemented as a single configuration with the proximity sensor, or can be implemented as a separate configuration distinct from the proximity sensor.

At least some of the wrappers constituting the stick (S) may change color due to the aerosol. The reuse detection sensor (134) may be arranged in response to a position where at least some of the wrappers whose color changes due to the aerosol are arranged when the stick (S) is inserted into the insertion space. For example, before the stick (S) is used by a user, the color of at least some of the wrappers may be a first color. At this time, as at least some of the wrappers are wetted by the aerosol generated by the aerosol generating device (1) while passing through the stick (S), the color of at least some of the wrappers may change to a second color. Meanwhile, the color of at least some of the wrappers may be maintained as the second color after changing from the first color to the second color.

The cartridge detection sensor (135) can detect the mounting and/or removal of the cartridge (19). The cartridge detection sensor (135) can be implemented by an inductance-based sensor, a capacitive sensor, a resistance sensor, a Hall sensor (hall IC) using the Hall effect, etc.

The cap detection sensor (136) can detect the attachment and/or removal of the cap. When the cap is separated from the body (10), a portion of the cartridge (19) and the body (10) covered by the cap may be exposed to the outside. The cap detection sensor (136) can be implemented by a contact sensor, a hall sensor (hall IC), an optical sensor, or the like.

The motion detection sensor (137) can detect the movement of the aerosol generating device. The motion detection sensor (137) can be implemented with at least one of an acceleration sensor and a gyro sensor.

In addition to the sensors (131 to 137) described above, the sensor (13) may further include at least one of a humidity sensor, a pressure sensor, a magnetic sensor, a position sensor (GPS), and a proximity sensor. Since the function of each sensor can be intuitively inferred from its name by a person skilled in the art, a detailed description thereof may be omitted.

The output unit (14) can output information on the status of the aerosol generating device (1) and provide it to the user. The output unit (14) can include at least one of a display (141), a haptic unit (142), and an audio output unit (143), but is not limited thereto. When the display (141) and the touch pad form a layer structure to form a touch screen, the display unit (141) can be used as an input device in addition to an output device.

The display (141) can visually provide information about the aerosol generating device (1) to the user. For example, the information about the aerosol generating device (1) can mean various information such as the charging/discharging status of the power supply (11) of the aerosol generating device (1), the preheating status of the heater (18), the insertion/removal status of the stick (S) and/or cartridge (19), the mounting/removal status of the cap, or the status in which the use of the aerosol generating device (1) is restricted (e.g., detection of an abnormal item), and the display (141) can output the information to the outside. For example, the display (141) can be in the form of an LED light-emitting element. For example, the display (141) can be a liquid crystal display panel (LCD), an organic light-emitting display panel (OLED), etc.

The haptic unit (142) can convert an electrical signal into a mechanical stimulus or an electrical stimulus to provide tactile information about the aerosol generating device (1) to the user. For example, the haptic unit (142) can generate a vibration corresponding to the completion of the initial preheating when the initial power is supplied to the cartridge heater (24) and/or the heater (18) for a set period of time. The haptic unit (142) can include a vibration motor, a piezoelectric element, or an electrical stimulation device.

The acoustic output unit (143) can provide information about the aerosol generating device (1) to the user audibly. For example, the acoustic output unit (143) can convert an electric signal into an acoustic signal and output it to the outside.

The power source (11) can supply power used to operate the aerosol generating device (1). The power source (11) can supply power so that the cartridge heater (24) and/or the heater (18) can be heated. In addition, the power source (11) can supply power required for the operation of other components provided in the aerosol generating device (1), such as a sensor (13), an output unit (14), an input unit (15), a communication unit (16), and a memory (17). The power source (11) can be a rechargeable battery or a disposable battery. For example, the power source (11) can be a lithium polymer (LiPoly) battery, but is not limited thereto.

Although not shown in FIG. 1, the aerosol generating device (1) may further include a power protection circuit. The power protection circuit may be electrically connected to a power source (11) and may include a switching element.

The power protection circuit can block the power path to the power source (11) according to a predetermined condition. For example, the power protection circuit can block the power path to the power source (11) when the voltage level of the power source (11) is equal to or higher than a first voltage corresponding to overcharge. For example, the power protection circuit can block the power path to the power source (11) when the voltage level of the power source (11) is lower than a second voltage corresponding to overdischarge.

The heater (18) can receive power from the power source (11) to heat the medium or aerosol generating material within the stick (S). Although not shown in FIG. 10, the aerosol generating device (1) may further include a power conversion circuit (e.g., a DC/DC converter) that converts power from the power source (11) and supplies it to the cartridge heater (24) and/or the heater (18). In addition, when the aerosol generating device (1) generates the aerosol by induction heating, the aerosol generating device (1) may further include a DC/AC converter that converts direct current power of the power source (11) into alternating current power.

The control unit (12), the sensor (13), the output unit (14), the input unit (15), the communication unit (16), and the memory (17) can receive power from the power supply (11) and perform their functions. Although not shown in FIG. 1, a power conversion circuit, for example, an LDO (low dropout) circuit or a voltage regulator circuit, which converts the power of the power supply (11) and supplies it to each component, may be further included. In addition, although not shown in FIG. 10, a noise filter may be provided between the power supply (11) and the heater (18). The noise filter may be a low pass filter. The low pass filter may include at least one inductor and a capacitor. The cutoff frequency of the low pass filter may correspond to the frequency of the high frequency switching current applied from the power supply (11) to the heater (18). By the low pass filter, it is possible to prevent high frequency noise components from being applied to a sensor (13), such as an insertion detection sensor (133).

In one embodiment, the cartridge heater (24) and/or the heater (18) may be formed of any suitable electrically resistive material. For example, suitable electrically resistive materials may be metals or metal alloys including, but not limited to, titanium, zirconium, tantalum, platinum, nickel, cobalt, chromium, hafnium, niobium, molybdenum, tungsten, tin, gallium, manganese, iron, copper, stainless steel, nichrome, and the like. Additionally, the heater (18) may be implemented as, but is not limited to, a metal wire, a metal plate having electrically conductive tracks arranged thereon, a ceramic heating element, and the like.

In another embodiment, the heater (18) may be an induction heating type heater. For example, the heater (18) may include a susceptor that heats the aerosol generating material by generating heat through a magnetic field applied by the coil.

The input unit (15) can receive information input from a user or output information to the user. For example, the input unit (15) can be a touch panel. The touch panel can include at least one touch sensor that detects touch. For example, the touch sensor can include, but is not limited to, a capacitive touch sensor, a resistive touch sensor, a surface acoustic wave touch sensor, an infrared touch sensor, etc.

The display (141) and the touch panel may be implemented as a single panel. For example, the touch panel may be inserted (on-cell type or in-cell type) into the display (141). For example, the touch panel may be added-on (add-on type) on the display panel (141).

Meanwhile, the input unit (15) may include, but is not limited to, buttons, key pads, dome switches, jog wheels, jog switches, etc.

The memory (17) is a hardware that stores various data processed in the aerosol generating device (1), and can store data processed and data to be processed in the control unit (12). The memory (17) may include at least one type of storage medium among a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, an SD or XD memory, etc.), a RAM (random access memory), a SRAM (static random access memory), a ROM (read-only memory), an EEPROM (electrically erasable programmable read-only memory), a PROM (programmable read-only memory), a magnetic memory, a magnetic disk, and an optical disk. The memory (17) may store data on the operation time of the aerosol generating device (1), the maximum number of puffs, the current number of puffs, at least one temperature profile, and a user's smoking pattern.

The communication unit (16) may include at least one component for communicating with another electronic device. For example, the communication unit (16) may include at least one of a short-range communication unit and a wireless communication unit.

The short-range wireless communication unit may include, but is not limited to, a Bluetooth communication unit, a BLE (Bluetooth Low Energy) communication unit, a Near Field Communication unit, a WLAN (Wi-Fi) communication unit, a Zigbee communication unit, an infrared (IrDA, infrared Data Association) communication unit, a WFD (Wi-Fi Direct) communication unit, a UWB (ultra wideband) communication unit, an Ant+ communication unit, etc.

The wireless communication unit may include, but is not limited to, a cellular network communication unit, an Internet communication unit, a computer network (e.g., a LAN or WAN) communication unit, etc.

Although not shown in FIG. 1, the aerosol generating device (1) further includes a connection interface, such as a USB (universal serial bus) interface, and can transmit and receive information or charge a power source (11) by connecting to another external device through a connection interface, such as a USB interface.

The control unit (12) can control the overall operation of the aerosol generating device (1). In one embodiment, the control unit (12) can include at least one processor. The processor can be implemented as an array of a plurality of logic gates, or can be implemented as a combination of a general-purpose microprocessor and a memory storing a program that can be executed in the microprocessor. In addition, it will be understood by those skilled in the art to which the present embodiment belongs that the processor can be implemented as other types of hardware.

The control unit (12) can control the temperature of the heater (18) by controlling the supply of power from the power source (11) to the heater (18). The control unit (12) can control the temperature of the cartridge heater (24) and/or the heater (18) based on the temperature of the cartridge heater (24) and/or the heater (18) sensed by the temperature sensor (131). The control unit (12) can adjust the power supplied to the cartridge heater (24) and/or the heater (18) based on the temperature of the cartridge heater (24) and/or the heater (18). For example, the control unit (12) can determine a target temperature for the cartridge heater (24) and/or the heater (18) based on a temperature profile stored in the memory (17).

The aerosol generating device (1) may include a power supply circuit (not shown) electrically connected to the power supply (11) between the power supply (11) and the cartridge heater (24) and/or the heater (18). The power supply circuit may be electrically connected to the cartridge heater (24), the heater (18), or the induction coil (not shown). The power supply circuit may include at least one switching element. The switching element may be implemented by a bipolar junction transistor (BJT), a field effect transistor (FET), or the like. The control unit (12) may control the power supply circuit.

The control unit (12) can control power supply by controlling the switching of the switching elements of the power supply circuit. The power supply circuit may be an inverter that converts direct current power output from the power source (11) into alternating current power. For example, the inverter may be configured as a full-bridge circuit or a half-bridge circuit including a plurality of switching elements.

The control unit (12) can turn on the switching element so that power is supplied from the power source (11) to the cartridge heater (24) and/or the heater (18). The control unit (12) can turn off the switching element so that power is cut off to the cartridge heater (24) and/or the heater (18). The control unit (12) can control the current supplied from the power source (11) by controlling the frequency and/or duty ratio of the current pulse input to the switching element.

The control unit (12) can control the voltage output from the power source (11) by controlling the switching of the switching element of the power supply circuit. The power conversion circuit can convert the voltage output from the power source (11). For example, the power conversion circuit can include a buck converter that steps down the voltage output from the power source (11). For example, the power conversion circuit can be implemented through a buck-boost converter, a zener diode, etc.

The control unit (12) can control the on/off operation of the switching element included in the power conversion circuit to adjust the level of the voltage output from the power conversion circuit. When the on state of the switching element continues, the level of the voltage output from the power conversion circuit may correspond to the level of the voltage output from the power source (11). The duty ratio for the on/off operation of the switching element may correspond to the ratio of the voltage output from the power conversion circuit to the voltage output from the power source (11). As the duty ratio for the on/off operation of the switching element decreases, the level of the voltage output from the power conversion circuit may decrease. The heater (18) can be heated based on the voltage output from the power conversion circuit.

The control unit (12) can control power to be supplied to the heater (18) by using at least one of the pulse width modulation (PWM) method and the proportional-integral-differential (PID) method.

For example, the control unit (12) can control a current pulse having a predetermined frequency and duty ratio to be supplied to the heater (18) using the PWM method. The control unit (12) can control the power supplied to the heater (18) by adjusting the frequency and duty ratio of the current pulse.

For example, the control unit (12) can determine a target temperature that is a target of control based on a temperature profile. The control unit (12) can control the power supplied to the heater (18) by using a PID method, which is a feedback control method using a difference value between the temperature of the heater (18) and the target temperature, a value obtained by integrating the difference value over time, and a value obtained by differentiating the difference value over time.

The control unit (12) can prevent the cartridge heater (24) and/or the heater (18) from overheating. For example, the control unit (12) can control the operation of the power conversion circuit to cut off the supply of power to the cartridge heater (24) and/or the heater (18) based on the temperature of the cartridge heater (24) and/or the heater (18) exceeding a preset limit temperature. For example, the control unit (12) can reduce the amount of power supplied to the cartridge heater (24) and/or the heater (18) by a predetermined ratio based on the temperature of the cartridge heater (24) and/or the heater (18) exceeding a preset limit temperature. For example, the control unit (12) can determine that the aerosol generating material contained in the cartridge (19) is exhausted based on the temperature of the cartridge heater (24) exceeding a preset limit temperature, and can cut off the supply of power to the cartridge heater (24).

The control unit (12) can control the charging and discharging of the power supply (11). The control unit (12) can check the temperature of the power supply (11) based on the output signal of the temperature sensor (131).

When a power line is connected to the battery terminal of the aerosol generating device (1), the control unit (12) can check whether the temperature of the power source (11) is equal to or higher than the first limit temperature, which is a criterion for blocking charging of the power source (11). When the temperature of the power source (11) is lower than the first limit temperature, the control unit (12) can control the power source (11) to be charged based on a preset charging current. When the temperature of the power source (11) is equal to or higher than the first limit temperature, the control unit (12) can block charging of the power source (11).

When the power of the aerosol generating device (1) is turned on, the control unit (12) can check whether the temperature of the power source (11) is equal to or higher than the second limit temperature, which is a criterion for blocking discharge of the power source (11). If the temperature of the power source (11) is lower than the second limit temperature, the control unit (12) can control to use the power stored in the power source (11). If the temperature of the power source (11) is equal to or higher than the second limit temperature, the control unit (12) can stop using the power stored in the power source (11).

The control unit (12) can calculate the remaining capacity of the power stored in the power source (11). For example, the control unit (12) can calculate the remaining capacity of the power source (11) based on the voltage and/or current sensing values of the power source (11).

The control unit (12) can determine whether a stick (S) is inserted into the insertion space through the insertion detection sensor (133). The control unit (12) can determine that the stick (S) is inserted based on the output signal of the insertion detection sensor (133). If it is determined that the stick (S) is inserted into the insertion space, the control unit (12) can control to supply power to the cartridge heater (24) and/or the heater (18). For example, the control unit (12) can supply power to the cartridge heater (24) and/or the heater (18) based on the temperature profile stored in the memory (17).

The control unit (12) can determine whether the stick (S) is removed from the insertion space. For example, the control unit (12) can determine whether the stick (S) is removed from the insertion space through the insertion detection sensor (133). For example, the control unit (12) can determine that the stick (S) is removed from the insertion space when the temperature of the heater (18) is higher than a limited temperature or when the temperature change slope of the heater (18) is higher than a set slope. When it is determined that the stick (S) is removed from the insertion space, the control unit (12) can cut off the power supply to the cartridge heater (24) and/or the heater (18).

The control unit (12) can control the power supply time and/or power supply amount to the heater (18) according to the state of the stick (S) detected by the sensor (13). The control unit (12) can check the level range that includes the level of the signal of the capacitance sensor based on a lookup table. The control unit (12) can determine the moisture content of the stick (S) according to the checked level range.

When the stick (S) is in an over-humidified state, the control unit (12) can control the power supply time to the heater (18) to increase the preheating time of the stick (S) compared to the normal state.

The control unit (12) can determine whether the stick (S) inserted into the insertion space is reused through the reuse detection sensor (134). For example, the control unit (12) can compare the sensing value of the signal of the reuse detection sensor with a first reference range that includes a first color, and if the sensing value is included in the first reference range, it can determine that the stick (S) is not used. For example, the control unit (12) can compare the sensing value of the signal of the reuse detection sensor with a second reference range that includes a second color, and if the sensing value is included in the second reference range, it can determine that the stick (S) is used. If it is determined that the stick (S) is used, the control unit (12) can cut off the supply of power to the cartridge heater (24) and/or the heater (18).

The control unit (12) can determine whether the cartridge (19) is coupled and/or removed through the cartridge detection sensor (135). For example, the control unit (12) can determine whether the cartridge (19) is coupled and/or removed based on the sensing value of the signal of the cartridge detection sensor.

The control unit (12) can determine whether the aerosol generating material of the cartridge (19) is exhausted. For example, the control unit (12) can preheat the cartridge heater (24) and/or the heater (18) by applying power, and determine whether the temperature of the cartridge heater (24) exceeds a limit temperature during the preheating section. If the temperature of the cartridge heater (24) exceeds the limit temperature, the control unit (12) can determine that the aerosol generating material of the cartridge (19) is exhausted. If the control unit (12) determines that the aerosol generating material of the cartridge (19) is exhausted, the control unit (12) can cut off the supply of power to the cartridge heater (24) and/or the heater (18).

The control unit (12) can determine whether the cartridge (19) is usable. For example, the control unit (12) can determine that the cartridge (19) cannot be used if the current number of puffs is greater than or equal to the maximum number of puffs set for the cartridge (19) based on data stored in the memory (17). For example, the control unit (12) can determine that the cartridge (19) cannot be used if the total time that the heater (24) has been heated is greater than or equal to the preset maximum time or the total amount of power supplied to the heater (24) is greater than or equal to the preset maximum amount of power.

The control unit (12) can perform a judgment regarding the user's inhalation through the puff sensor (132). For example, the control unit (12) can determine whether a puff has occurred based on the sensing value of the signal of the puff sensor. For example, the control unit (12) can determine the intensity of the puff based on the sensing value of the signal of the puff sensor (132). If the number of puffs reaches a preset maximum number of puffs or if no puffs are detected for a preset time or longer, the control unit (12) can cut off the supply of power to the cartridge heater (24) and/or heater (18).

The control unit (12) can determine whether the cap is attached and/or removed through the cap detection sensor (136). For example, the control unit (12) can determine whether the cap is attached and/or removed based on the sensing value of the signal of the cap detection sensor.

The control unit (12) can control the output unit (14) based on the result detected by the sensor (13). For example, when the number of puffs counted through the puff sensor (132) reaches a preset number, the control unit (12) can notify the user that the aerosol generating device (1) will soon be terminated through at least one of the display (141), the haptic unit (142), and the sound output unit (143). For example, the control unit (12) can notify the user through the output unit (14) based on the determination that the stick (S) does not exist in the insertion space. For example, the control unit (12) can notify the user through the output unit (14) based on the determination that the cartridge (19) and/or the cap is not mounted. For example, the control unit (12) can transmit information on the temperature of the cartridge heater (24) and/or the heater (18) to the user through the output unit (14).

The control unit (12) can store and update the history of the event that occurred in the memory (17) based on the occurrence of a predetermined event. The event may include operations such as detection of insertion of the stick (S), initiation of heating of the stick (S), detection of puff, termination of puff, detection of overheating of the cartridge heater (24) and/or the heater (18), detection of overvoltage application to the cartridge heater (24) and/or the heater (18), termination of heating of the stick (S), on/off of the aerosol generating device (1), initiation of charging of the power source (11), detection of overcharge of the power source (11), termination of charging of the power source (11), etc. The history of the event may include the time when the event occurred, log data corresponding to the event, etc. For example, when the predetermined event is detection of insertion of the stick (S), the log data corresponding to the event may include data on the sensing value of the insertion detection sensor (133), etc. For example, if a given event is overheating detection of the cartridge heater (24) and/or heater (18), log data corresponding to the event may include data on the temperature of the cartridge heater (24) and/or heater (18), the voltage applied to the cartridge heater (24) and/or heater (18), the current flowing to the cartridge heater (24) and/or heater (18), etc.

The control unit (12) can control to form a communication link with an external device, such as a user's mobile terminal. When data regarding authentication is received from the external device through the communication link, the control unit (12) can release the restriction on the use of at least one function of the aerosol generating device (1). Here, the data regarding authentication can include data indicating completion of user authentication for a user corresponding to the external device. The user can perform user authentication through the external device. The external device can determine whether user data is valid based on the user's birthday, a unique number indicating the user, etc., and can receive data regarding the use authority of the aerosol generating device (1) from an external server. The external device can transmit data indicating completion of user authentication to the aerosol generating device (1) based on the data regarding the use authority. When the user authentication is completed, the control unit (12) can release the restriction on the use of at least one function of the aerosol generating device (1). For example, the control unit (12) can release the restriction on the use of the heating function that supplies power to the heater (18) when user authentication is completed.

The control unit (12) can transmit data on the status of the aerosol generating device (1) to the external device through a communication link formed with the external device. Based on the received status data, the external device can output the remaining capacity of the power supply (11) of the aerosol generating device (1), the operation mode, etc. through the display of the external device.

The external device can transmit a location search request to the aerosol generating device (1) based on an input that initiates location search of the aerosol generating device (1). When receiving a location search request from the external device, the control unit (12) can control at least one of the output devices to perform an operation corresponding to the location search based on the received location search request. For example, the haptic unit (142) can generate vibration in response to the location search request. For example, the display (141) can output an object corresponding to the location search and the end of the search in response to the location search request.

The control unit (12) can control to perform a firmware update when receiving firmware data from an external device. The external device can check the current version of the firmware of the aerosol generating device (1) and determine whether a new version of the firmware exists. When an input requesting firmware download is received, the external device can receive a new version of the firmware data and transmit the new version of the firmware data to the aerosol generating device (1). The control unit (12) can control to perform a firmware update of the aerosol generating device (1) when receiving a new version of the firmware data.

The control unit (12) can transmit data on the sensing value of at least one sensor (13) to an external server (not shown) through the communication unit (16), and receive and store a learning model generated by learning the sensing value through machine learning such as deep learning from the server. The control unit (12) can perform an operation of determining a user's inhalation pattern, an operation of generating a temperature profile, etc., using the learning model received from the server. The control unit (12) can store, in the memory (17), the sensing value data of at least one sensor (13) and data for learning an artificial neural network (ANN). For example, the memory (17) can store a database for each component equipped in the aerosol generating device (1) for learning the artificial neural network (ANN), and weights and biases forming the artificial neural network (ANN) structure. The control unit (12) can learn data on the sensing values of at least one sensor (13), the user's suction pattern, temperature profile, etc., stored in the memory (17), and generate at least one learning model used for determining the user's suction pattern, generating a temperature profile, etc.

FIGS. 2 and 3 illustrate an aerosol generating device (1) according to embodiments of the present disclosure.

Referring to FIGS. 2 and 3, the aerosol generating device (1) may include a body (10) and a cartridge (19). The aerosol generating device (1) may include at least one of a power source (11), a control unit (12), and a sensor (13). At least one of the power source (11), the control unit (12), and the sensor (13) may be disposed inside the body (10). The body (10) may be equipped with a cartridge (19), which is an aerosol generating article. A user may inhale the aerosol by putting a mouthpiece provided at one end of the cartridge (19) in his/her mouth.

The cartridge (19) can contain an aerosol generating material in any one of a liquid state, a solid state, a gaseous state, or a gel state, within a chamber (C0) therein. The aerosol generating material can include a liquid composition. For example, the liquid composition can be a liquid including a tobacco-containing material including a volatile tobacco flavoring component, or can be a liquid including a non-tobacco material.

The cartridge (19) can be detachably coupled to the body (10). The cartridge (19) can be mounted on the body (10) by being inserted into the body (10).

The body (10) can be formed in a structure in which outside air can flow into the interior of the body (10) while the cartridge (19) is inserted. At this time, the outside air that flows into the body (10) can pass through the cartridge (19) and flow into the user's oral cavity through the airflow channel (CN).

The cartridge (19) may include a chamber (C0) containing an aerosol generating material and/or a heater (24) for heating the aerosol generating material in the chamber (C0). A liquid delivery means (25) impregnated with (contained) the aerosol generating material may be disposed inside the chamber (C0). Here, the liquid delivery means (25) may include a wick such as cotton fiber, ceramic fiber, glass fiber, porous ceramic material, etc. The electrically conductive track of the heater (24) may be formed in a coil-shaped structure that winds the liquid delivery means (25) or a structure that contacts one side of the liquid delivery means (25). The heater (24) may be referred to as a cartridge heater.

The cartridge (19) can generate an aerosol. As the liquid delivery means (25) is heated by the cartridge heater (24), an aerosol can be generated. The generated aerosol can be inhaled into the user's oral cavity through the airflow channel (CN).

An airflow channel (CN) may be provided in the cartridge (19). The airflow channel (CN) may communicate with the chamber (C1, see FIG. 3) in which the heater (24) of the cartridge (19) is arranged and the outside of the cartridge. One end of the airflow channel (CN) may be opened to the chamber (C1) in which the heater (24) is arranged and the other end may be communicated with the mouthpiece (35). For example, referring to FIG. 2, the airflow channel (CN) may extend along the length of the cartridge (19) from one side of the chamber (C0) of the cartridge (19). For example, referring to FIG. 3, the airflow channel (CN) may extend along the length of the cartridge (19) by penetrating the chamber (C0) of the cartridge (19).

The power source (11) can supply power to operate components of the aerosol generating device (1). The power source (11) can be referred to as a battery. The power source (11) can supply power to at least one of the control unit (12), the sensor (13), and the cartridge heater (24).

The control unit (12) can control the overall operation of the aerosol generating device (1). The control unit (12) can be mounted on a printed circuit board (PCB). The control unit (12) can control the operation of at least one of the power supply (11), the sensor (13), and the cartridge (19). The control unit (12) can control the operation of a display, a motor, etc. installed in the aerosol generating device (1). The control unit (12) can check the status of each of the components of the aerosol generating device (1) to determine whether the aerosol generating device (1) is in an operable state.

The control unit (12) can analyze the results detected by the sensor (13) and control the processes to be performed thereafter. For example, the control unit (12) can control the power supplied to the cartridge heater (24) so that the operation of the cartridge heater (24) is started or ended based on the results detected by the sensor (13). For example, the control unit (12) can control the amount of power supplied to the cartridge heater (24) and the time for which the power is supplied so that the cartridge heater (24) can be heated to a predetermined temperature or maintained at an appropriate temperature based on the results detected by the sensor (13).

The sensor (13) may include at least one of a temperature sensor, a puff sensor, a cartridge detection sensor, and a movement detection sensor. For example, the sensor (13) may sense at least one of the temperature of the cartridge heater (24), the temperature of the power source (11), and the temperature inside and outside the body (10). For example, the sensor (13) may sense a puff of a user. For example, the sensor (13) may sense whether a cartridge (19) is mounted. For example, the sensor (13) may sense the movement of the aerosol generating device (1).

FIG. 4 is a cross-sectional view of an aerosol generating device according to one embodiment of the present disclosure.

Referring to FIG. 4, an aerosol generating device according to one embodiment of the present disclosure may include a body (10) and a cartridge (19). The cartridge (19) may include a first container (20) and a second container (30). The cartridge (19) may be coupled to the body (10).

The body (10) can accommodate a power source (11) and a control unit (12). The power source (11) can supply power required for the configuration to operate. The power source (11) can be referred to as a battery (11). The control unit (12) can control the operation of the configuration.

The first container (20) may provide a first chamber (C1) therein. The first container (20) may have a wick (25). The wick (25) may be placed in the first chamber (C1). The upper end of the wick (25) may protrude from the first chamber (C1) to the upper side of the first container (20).

The first container (20) may be provided with a heater (2531). The heater (2531) may be placed in the first chamber (C1). The heater (2531) may heat the wick (25). The heater (2531) may be attached to the wick (25). The first container (20) may be provided with a second terminal (223) therein. The second terminal (223) may be exposed to the lower portion of the first container (20). The second terminal (223) may be electrically connected to the heater (2531). The first container (20) may be referred to as a lower container (20) or a heating module (20).

The first container (20) may be provided with a first air inlet (241) formed by opening the first chamber (C1). The first container (20) may be provided with a first air outlet (242) formed by opening the first chamber (C1).

The second container (30) may provide a second chamber (C2) therein. The second container (30) may store liquid in the second chamber (C2). The second container (20) may have an air discharge passage (340). Both ends (341, 342) of the air discharge passage (340) may be open. The air discharge passage (340) may be partitioned from the second chamber (C2). The second container (30) may be referred to as an upper container (30) or a liquid storage section (30).

The mouthpiece (35) can be coupled to the upper side of the second container (30). The mouthpiece (35) can cover the upper part of the second container (30). The mouthpiece (35) can have a second airflow outlet (354) therein. The second airflow outlet (354) can be connected to the other end (342) of the airflow outlet path (340).

The first container (20) can be coupled to the body (10). The first container (20) can be inserted into the interior of the body (10). When the first container (20) is coupled to the body (10), the heater (2531) can be electrically connected to a power source (11) through the second terminal (223). The heater (2531) can be supplied with power from the power source (11) and generate heat. The heater (2531) can be a resistive heater.

The second container (30) may be coupled to the upper side of the first container (20). The coupling of the second container (30) to the first container (20) may include the second container (30) being directly coupled to the first container (20) and the second container (30) being indirectly coupled to the first container (20) by being coupled to the body (10).

When the second container (30) is coupled to the first container (20), the second container (30) can supply the stored liquid to the wick (25). The wick (25) can receive and absorb the liquid from the second container (30). The heater (2531) can heat the wick (25) that has absorbed the liquid to generate an aerosol in the first chamber (C1).

The body (10) may be provided with a second air inlet (1411) by having one side open. When the first container (20) is coupled to the body (10), the first air inlet (241) may be connected to the second air inlet (1411). When the second container (30) is coupled to the first container (20), one end (341) of the air discharge path (340) and the first air discharge path (242) may be connected. Accordingly, a path through which air flows may be formed. The user may put the mouthpiece (35) in his mouth and inhale air. When a user inhales air, the outside air can be provided to the user by sequentially passing through the second air inlet (1411), the first air inlet (241), the first chamber (C1), the first air outlet (242), the air outlet path (340), and the second air outlet (354). The air can flow together with the aerosol generated in the first chamber (C1).

Accordingly, the first container (20) and the second container (30) can be replaced independently of each other. For example, the consumption cycle of the liquid stored in the second container (30) and the appropriate replacement cycle of the first container (20) may be different from each other, and the user may separately replace only the second container (30) or separately replace only the first container (20). For example, the consumption cycle of the liquid stored in the second container (30) may be shorter than the appropriate replacement cycle of the first container (20), and when the second container (30) is replaced multiple times, the first container (20) may be replaced only once. Accordingly, the first container (20) can be used for a longer period of time, and the cost of replacing the cartridge can be reduced.

FIG. 5 is an exploded cross-sectional view of a body and cartridge of an aerosol generating device according to one embodiment of the present disclosure.

Referring to FIG. 5, the first container (20) can be detachably coupled to the body (10). The first coupler (151) can detachably couple the first container (20) and the body (10). For example, the first coupler (151) can include a hook groove (225) and a hook (125) detachably fastened to the hook groove (225). The hook (125) can be formed of a material such as rubber or silicone to seal between the body around the second airflow inlet (1411) and the first container (20). As another example, the first coupler (151) can couple the first container (20) and the body (10) through magnetic force.

The second container (30) can be detachably coupled to the first container (20). The second container (30) can be coupled to the upper side of the first container (20). The second container (30) can be coupled to the body (10) and indirectly coupled to the first container (20). The second coupler (152) can detachably couple the second container (30) and the body (10). For example, the second coupler (152) can include a hook groove (325) and a hook (135) detachably fastened to the hook groove (325). As another example, the second coupler (152) can couple the second container (30) and the body (10) through magnetic force.

FIG. 6 is an exploded perspective view of a first container of an aerosol generating device according to an embodiment of the present disclosure, and FIG. 7 is a bottom perspective view of the first container of the aerosol generating device according to an embodiment of the present disclosure.

Referring to FIG. 6, the first container (20) may include a case (21), a wick (25), and a heater (2531, see FIG. 7). The case (21) may include a first case (22) and a second case (23).

The second case (23) can be coupled to the upper side of the first case (22). The first case (22) can be opened upwardly and have a space (224) forming a first chamber (C1). The second case (23) can be opened downwardly and have a space (234) forming a first chamber (C1). The first case (22) and the second case (23) can be coupled upwardly and downwardly to form a first chamber (C1) therein.

The second terminal (223) may be fixed to the bottom of the first case (22) and exposed to the lower portion of the first case (22). The second terminal (223) may protrude upward from the first case (22) toward the first chamber (C1). The second terminals (223) may be provided as a pair spaced apart from each other horizontally.

The first air inlet (241) may be formed at the bottom of the first case (22). The first air inlet (241) may be formed in multiple numbers to form a multi-hole shape. The first air inlet (241) may be spaced apart from the second terminal (223) in a horizontal direction. The first air inlet (241) may be formed by opening the lateral wall of the first case (22) and/or the lateral wall of the second case (23).

The case (21) may have one configuration of the first coupler (151). For example, the hook home (225) may be formed by recessing the lower periphery of the first case (22). As another example, the hook (125) may be formed by protruding the lower periphery of the first case (22). As another example, the first case (21) may have a magnet or a ferromagnetic body.

The first airflow outlet (242) may be formed on the upper wall of the second case (23). As another example, the first airflow outlet (242) may be formed on the side wall of the second case (23). The first airflow outlet (242) may be formed at a position facing the first airflow inlet (241).

The liquid inlet (235) may be formed on the upper wall of the second case (23). The liquid inlet (235) may be formed on the upper side of the first chamber (C1). The liquid inlet (235) may be separated from the first airflow outlet (242). The liquid inlet (235) may be formed on one side of the upper wall of the second case (23), and the first airflow outlet (242) may be formed on the other side of the upper wall of the second case (23). The liquid inlet (235) may be formed on a side corresponding to the second terminal (223) and the supporter (227), and the first airflow outlet (242) may be formed on a side corresponding to the first airflow inlet (241).

The wick (25) may include a first wick part (251) and a second wick part (252). The first wick part (251) may be placed in the first chamber (C1) between the first case (22) and the second case (23). The lower edge of the first wick part (251) may be supported by a supporter (227).

The second wick part (252) can protrude upward from the first wick part (251). The second wick part (252) can be exposed to the outside of the first chamber (C1) through the liquid inlet (235). The second wick part (252) can protrude upward by penetrating the liquid inlet (235) and the first wick sealing portion (265).

Referring to FIG. 7, a heater (2531) can be coupled to a first wick part (251). The heater (2531) can heat the first wick part (251). A first terminal (2533) formed at both ends of the heater (2531) can be in contact with a second terminal (223), thereby electrically connecting the heater (2531) and the second terminal (233).

The supporter (227) may protrude upward from the bottom of the first case (22). The supporter (227) may be formed around the second terminal (223). The supporters (227) may be provided in multiple numbers and arranged around the second terminal (223). The supporter (227) may include a first supporter (227a) and a second supporter (227b). The first supporter (227a) and the second supporter (227b) may be arranged in an area corresponding to a lower edge of the first core part (251).

The first supporter (227a) and the second supporter (227b) may be spaced apart from each other. The second supporter (227b) may be formed at a position adjacent to the first airflow outlet (242). The second supporter (227b) may be formed between the second terminal (223) and the first airflow inlet (241). The second supporters (227b) may be formed as a pair. The pair of second supporters (227b) may be spaced apart from each other to form a first gap (227c) therebetween. The first supporter (227a) and the second supporter (227b) may be spaced apart from each other to form a second gap (227d) therebetween.

The sealer (26) can be coupled to the upper side of the first container (20). The sealing plate (261) of the sealer (26) can cover the upper surface of the case (21). The sealer (26) can be formed of an elastic material. For example, the sealer (26) can be formed of a rubber or silicone material.

The sealer (26) may include a first wick sealing portion (265). The first wick sealing portion (265) may be formed by opening a sealing plate (261) at a position corresponding to the liquid inlet (235). The first wick sealing portion (265) may form an inner circumferential surface of the sealing plate (261). The first wick sealing portion (265) may have a shape corresponding to a circumferential surface (235a) surrounding the liquid inlet (235). The first wick sealing portion (265) may protrude downward from the sealing plate (261) and come into close contact with the inner side of the circumferential surface (235a) of the liquid inlet (235). The second wick part (252) can pass through the first wick sealing part (265) and protrude above the liquid inlet (235).

The sealer (26) may include a second wick sealing portion (262). The second wick sealing portion (262) may protrude downward from the lower surface of the sealing plate (261). The second wick sealing portion (262) may be formed on the lower side of the first wick sealing portion (265) or on the lower side around the first wick sealing portion (265). The second wick sealing portion (262) may extend along the perimeter of the first wick sealing portion (265).

The sealer (26) may include a sealing wall (266, 267) protruding upward from the upper surface of the sealing plate (261). The sealing wall (266, 267) may surround the periphery of the liquid inlet (235) and the first wick sealing portion (265). The sealing wall (266, 267) may extend along the periphery of the first wick sealing portion (265) to form a periphery. The sealing walls (266, 267) may be formed in plurality. For example, the sealing walls (266, 267) may include a first sealing wall (266) adjacent to the periphery of the first wick sealing portion (265) and a second sealing wall (267) spaced outwardly from the first sealing wall (266). The second sealing wall (267) may protrude higher upward than the first sealing wall (266). The second sealing wall (267) may surround the first sealing wall (266).

The sealer (26) may include an airflow sealing portion (268). The airflow sealing portion (268) may surround the periphery of the first airflow outlet (242). The airflow sealing portion (268) may protrude upward from the upper surface of the sealing plate (261). The second sealing wall (267) may protrude higher than the airflow sealing portion (268). The airflow sealing portion (268) may be formed on the outer side of the sealing walls (266, 267).

The wick (25) may be formed of a porous rigid body that absorbs liquid. For example, the wick (25) may be formed of a porous ceramic. The wick (25) may be stronger or more heat-resistant than a cotton wick.

Accordingly, the wick (25) can be implemented in various shapes without or with little deformation. In addition, the durability of the wick (25) is improved, and the replacement cycle of the first container (20) equipped with the wick (25) can be increased.

The first wick part (251) may be extended in one horizontal direction. The first wick part (251) may have a hexahedral shape. The upper surface of the first wick part (251) may be formed horizontally. The lower surface of the first wick part (251) may be formed horizontally. The side surface of the first wick part (251) may be formed between the upper surface perimeter and the lower surface perimeter, thereby defining the perimeter of the first wick part (251). The side surface of the first wick part (251) may be named the perimeter surface of the first wick part (251).

The second wick part (252) may protrude upward from the center of the upper surface of the first wick part (251). The second wick part (252) may extend long in a horizontal direction. The second wick part (252) may have a hexahedral shape. The upper surface of the second wick part (252) may be formed horizontally. The lower surface of the second wick part (252) may be formed horizontally. The lower surface of the second wick part (252) may overlap with the upper surface of the first wick part (251). The side surface of the second wick part (252) may be formed between the upper surface perimeter and the lower surface perimeter to define the perimeter of the second wick part (252). The side surface of the second wick part (252) can be named the peripheral surface of the second wick part (252).

The first wick part (251) may be larger than the second wick part (252). The perimeter of the upper surface of the first wick part (251) may be larger than the perimeter of the upper surface of the second wick part (252). The height of the first wick part (251) may be larger than the height of the second wick part (252). The length of the first wick part (251) may be larger than the length of the second wick part (252). The width of the first wick part (251) may be larger than the width of the second wick part (252).

The first wick part (251) can protrude horizontally outwardly from the lower surface of the second wick part (252) by a certain width. The second wick part (252) can protrude from the inner side of the perimeter of the upper surface of the first wick part (251). The perimeter of the upper surface of the first wick part (251) can protrude outward from the lower surface of the second wick part (252).

The heater (2531) can be attached to the first wick part (251). The heater (2531) can form a pattern on the lower surface of the first wick part (251). The heater (2531) can form various patterns along the longitudinal direction of the first wick part (251). Both ends of the heater (2531) can be adjacent to both ends of the first wick part (251).

A pair of first terminals (2533) may be formed at opposite ends of the heater (2531). The first terminals (2533) may be coupled to the lower surface of the first wick part (251). The pair of first terminals (2533) may be adjacent to both ends of the first wick part (251). The first terminals (2533) may protrude downward from the first wick part (251).

FIG. 8 is a cross-sectional view of a first container of an aerosol generating device according to one embodiment of the present disclosure.

Referring to FIG. 8, the first air inlet (241) may be formed on the lower side of the first chamber (C1). The first air outlet (242) may be formed on the upper side of the first chamber (C1). The first air inlet (241) and the first air outlet (242) may be formed in a vertically parallel manner. The wick (25) may be arranged on the right side of the first chamber (C1), and the first air inlet (241) and the first air outlet (242) may be formed on the left side of the first chamber (C1). The first channel (CN1) may be formed on the left side of the first chamber (C1) and may be provided with the first air inlet (241) and the first air outlet (242). Air can be introduced into the first channel (CN1) through the first air inlet (241) and discharged through the first air outlet (242).

The first terminal (2533) can be in contact with the second terminal (223) to electrically connect the heater (2531) and the second terminal (223). The second terminal (223) can support the first terminal (2533) and the lower surface (2513) of the first wick part (251).

The lower part of the first wick part (251) may be supported by the supporter (227). The upper surface (2511) of the first wick part (251) may be supported by the lower part of the second case (23) and/or the second wick sealing part (262) around the liquid inlet (235). The periphery of the side (2522) of the second wick part (252) may be supported by the periphery surface (235a) of the liquid inlet (235) and/or the inner surface of the first wick sealing part (265).

Accordingly, the wick (25) can be fixed to the first container (20).

The supporter (227) can separate the first wick part (251) from the bottom of the first chamber (C1) upwardly. The supporter (227) can be arranged around the heater (2531). The supporter (227) can form a gap (227c, 227d) that connects the heater (2531) attached to the lower surface (2513) of the first wick part (251) to the first chamber (C1). The supporter (227) can be opened between the first channel (CN1) and the heater (2531) to form the first gap (227c).

The supporter (227) may include a first supporter (227a) and a second supporter (227b). The second supporter (227b) may be positioned closer to the first air inlet (241) and the first air outlet (242) than the first supporter (227a). The first air inlet (241) and the first air outlet (242) may be adjacent to the left side of the first wick part (251). The first supporter (227a) may be extended along the right edge between the lower surface (2513) and the side surface (2512) of the first wick part (251). The first supporter (227a) can support the area around the right edge between the lower surface (2513) and the side surface (2512) of the first core part (251). A pair of second supporters (227b) can support the area around the left vertex of the first core part (251).

A pair of second supporters (227b) may be spaced apart from each other to form a first gap (227c) through which air may flow between the periphery of the heater (2531) and the first air outlet (242). The first supporter (227a) and the second supporter (227b) may be spaced apart from each other to form a second gap (227d) through which air may flow between the periphery of the heater (2531) and the first air outlet (242). The first gap (227c) and the second gap (227d) may be formed around the lower surface (2513) of the first wick part (251).

Accordingly, the aerosol generated from the wick (25) and the air surrounding it can flow smoothly through a pair of multiple supporters (227) toward the first airflow outlet (242).

The first wick sealing portion (265) can be arranged between the circumferential surface (2522) of the second wick part (252) and the circumferential surface (235a) of the liquid inlet (235). The inner circumferential surface of the first wick sealing portion (265) can be in close contact with the circumferential surface (2522) of the second wick part (252). The first wick sealing portion (265) can seal between the circumferential surface (2522) of the second wick part (252) and the circumferential surface (235a) of the liquid inlet (235).

The circumference of the upper surface (2511) of the first wick part (251) may be larger than the circumference of the liquid inlet (235). The circumference of the upper surface (2511) of the first wick part (251) may be formed horizontally further outside the circumference of the liquid inlet (235). The edge portion of the first wick part (251) may absorb liquid leaking between the liquid inlet (235) and the circumference surface (2522) of the second wick part (252).

The second wick sealing portion (262) can protrude downward from the periphery of the liquid inlet (235) toward the upper surface (2511) of the first wick part (251). The second wick sealing portion (262) can be in close contact with the upper surface (2511) of the first wick part (251). The second wick sealing portion (262) can support the upper surface (2511) of the first wick part (251).

Accordingly, the liquid supplied from the second container (30) to the wick (25) can be prevented from leaking into the first chamber (C1) through the circumferential surface (235a) of the second wick part (252) and the liquid inlet (235) without being absorbed by the wick (25).

FIG. 9 is an exploded cross-sectional view of a first container and a second container of an aerosol generating device according to an embodiment of the present disclosure, FIG. 10 is a combined cross-sectional view of the first container and the second container of an aerosol generating device according to an embodiment of the present disclosure, and FIG. 11 is a cross-sectional view illustrating an airflow channel of an aerosol generating device according to an embodiment of the present disclosure.

Referring to FIG. 9, the second container (30) can provide a second chamber (C2) for storing liquid. The liquid discharge port (314) can be formed by opening the second chamber (C2). The liquid discharge port (314) can be formed at the bottom of the second chamber (C2). The liquid discharge port (314) can be composed of a plurality of holes. The liquid stored in the second chamber (C2) can be discharged through the liquid discharge port (314).

The absorbent portion (316) can block the lower portion of the liquid discharge port (314). The absorbent portion (316) can absorb liquid that has passed through the liquid discharge port (314). For example, the absorbent portion (316) can be formed of a felt material.

The bracket (317) may protrude from the periphery of the liquid discharge port (314) toward the lower side of the second container (30). The bracket (317) may surround the side periphery of the absorbent portion (316). The absorbent portion (316) may be exposed from the bracket (317) toward the lower side of the second container (30). The bracket (317) may secure the absorbent portion (316) to the lower side of the second container (30). The bracket (317) may support the lower periphery of the absorbent portion (316) in a hook shape.

The film can be detachably attached to the lower surface of the absorbent portion (316). The edge of the film can be attached to the lower surface of the bracket (317). The film can be formed of a waterproof material. The film can prevent liquid from leaking from the absorbent portion (316). Before attaching the second container (30) to the first container (20), the user can detach the film from the absorbent portion (316).

The recessed portion (315) may be formed by recessing the lower surface (312) of the second container (30) upward. The groove formed by the recessed portion (315) may surround the bracket (317).

The second container (30) may have one configuration of the second coupler (152). For example, the hook home (325) may be formed by recessing the outer wall of the second container (30). As another example, the hook (135) may be formed by protruding the outer wall of the second container (30). As another example, the second container (30) may have a magnet or a ferromagnetic body.

The second container (30) can provide an air discharge path (340). The air discharge path (340) can be partitioned from the second chamber (C2) by the inner wall of the second container (30). The air discharge path (340) can be defined by the outer wall and the inner wall of the second container (30). Both ends of the air discharge path (340) can be open. One end of the air discharge path (340) can be opened downward. The other end of the air discharge path (340) can be opened upward. One end of the air discharge path (340) can be formed by opening the lower surface (312) of the second container (30). The other end of the air discharge path (340) may be connected to a second air discharge port (354) formed inside the mouthpiece (35). The air discharge path (340) may be named a second channel (CN2).

Referring to FIG. 10, the first container (20) can be detachably coupled to the body (10). The first coupler (151) can detachably couple the first container (20) and the body (10). The second container (30) can be detachably coupled to the first container (20). The second container (30) can be indirectly coupled to the first container (20) by being coupled to the body (10) via the second coupler (152). The second container (30) can be coupled to the upper side of the first container (20).

When the second container (30) is combined with the first container (20), the second container (30) can supply liquid to the wick (25). The liquid stored in the second chamber (C2) passes through the liquid discharge port (314) and is absorbed by the absorption part (316), and the absorption part (316) that has absorbed the liquid can contact the second wick part (252) to transfer the liquid. The liquid absorbed by the second wick part (252) can spread to the first wick part (251). The heater (2531) can heat the first wick part (251) that has absorbed the liquid to generate an aerosol.

The sealer (26) can seal the periphery of the liquid inlet (235) where the wick (25) is exposed from the first chamber (C1). When the second container (30) is coupled to the upper side of the first container (20), the sealer (26) can seal between the first container (20) and the second container (30).

The sealing wall (266, 267) may protrude toward the second container (30). The sealing wall (266, 267) may be in close contact with the second container (30). The sealing wall (266, 267) may surround the liquid inlet (235).

Accordingly, it is possible to prevent liquid discharged from the second container (30) from leaking into the gap between the first container (20) and the second container (30).

The first sealing wall (266) can surround the liquid inlet (235) and the perimeter (2522) of the second wick part (252). The first sealing wall (266) can be in close contact with the lower part of the second container (30). The first sealing wall (266) can be in close contact with a protruding portion formed on the inner side of the recessed portion (315). For example, the first sealing wall (266) can be in close contact with the bracket (317). The bracket (317) and the first sealing wall (266) can surround the perimeter (2522) of the second wick part (252). Accordingly, the bracket (317) can not only secure the absorption portion (316), but also pressurize the first sealing wall (266) to seal the area around the second wick part (252) and the liquid inlet (235).

The second sealing wall (267) may protrude higher than the first sealing wall (266). The second sealing wall (267) may be arranged on the horizontal outer side of the first sealing wall (266) and may surround the first sealing wall (266). The second sealing wall (267) may be in close contact with the lower part of the second container (30). The second sealing wall (267) may be inserted into a groove formed by the recessed portion (315) and may be in close contact with the recessed portion (315).

Accordingly, the first sealing wall (266) can seal the area around the second wick part (252) and the liquid inlet (235). In addition, even if the liquid flows out of the first sealing wall (266), it can be sealed by the second sealing wall (267).

Referring to FIG. 11, the first channel (CN1) may be formed on the left side of the first chamber (C1). The wick (25) and the heater (2531) may be arranged on the right side of the first chamber (C1). The first channel (CN1) may have a first air inlet (241) and a first air outlet (242). The first air inlet (241) may be formed at one end of the first channel (CN1). The first air outlet (242) may be formed at the other end of the first channel (CN1). The first channel (CN1) may be misaligned from the wick (25) with respect to the vertical direction. The wick (25) may be spaced apart from the first air inlet (241) and the first air outlet (242). Unlike the one shown, at least one of the first air inlet (241) and the first air outlet (242) may be formed by opening the side wall of the first container (20) in the first channel (CN1).

When the first container (20) is coupled to the body (10), the second air inlet (1411) formed by opening one side of the body (10) can be communicated with the first air inlet (241). Around the second air inlet (1411), the area between the body (10) and the first container (20) can be sealed. For example, the hook (125) can seal the area between the body (10) and the first container (20) around the second air inlet (1411).

When the second container (30) is coupled to the first container (20), the lower end of the first airflow outlet (242) and the second channel (CN2) can be connected. The first channel (CN1) and the second channel (CN2) can be connected to form one flow path (CN). The second channel (CN2) can be connected to the second airflow outlet (354).

When a user puts the mouthpiece (35) in his/her mouth and inhales air, external air can be provided to the user by sequentially passing through the second air inlet (1411), the first channel (CN1), the second channel (CN2), and the second air outlet (354). The aerosol can be generated in the first chamber (C1) spaced apart from the first channel (CN1). The air passing through the first channel (CN1) can flow together with the air and aerosol of the first chamber (C1) due to the suction force and the pressure difference. The air and the aerosol can flow into the first channel (CN1) by passing through the first gap (227c) and the second gap (227d) between the supporters (227).

Accordingly, the size of the flow path can be reduced by allowing air to flow only to one side of the first chamber (C1), thereby reducing or optimizing the size of the aerosol generating device. In addition, the air flow resistance from the structure supporting the wick (25) can be reduced.

The airflow sealing portion (268) can be in close contact with the lower portion of the second container (30) around the lower portion of the second channel (CN2). The airflow sealing portion (268) can surround the lower portion of the second channel (CN2) and the first airflow discharge port (242). The airflow sealing portion (268) can seal between the first container (20) and the second container (30) around the lower portion of the airflow discharge path (340) and the first airflow discharge port (242).

Accordingly, air passing through the air discharge path (340) from the first air discharge port (242) can be prevented from leaking between the first container (20) and the second container (30), and the air flow efficiency can be improved.

In this document, terms such as "substantially," "approximately," "typically," and "about" when referring to a given parameter, property, or condition may include the extent to which a person of ordinary skill in the art would understand the given parameter, property, or condition to be satisfied with a small degree of variance, such as within acceptable manufacturing tolerances. For example, a particular parameter that is substantially satisfied may be at least about 90% satisfied, at least about 95% satisfied, or at least 99% satisfied.

FIG. 12 is a cross-sectional drawing of an aerosol generating device according to one embodiment. FIG. 13 is a plan view of an aerosol generating device according to one embodiment. FIG. 14 is a cross-sectional drawing of a portion of a heater according to one embodiment.

Referring to FIGS. 12-14, the aerosol generating device (400) may include a housing (410), which may be referred to as a “body.” The housing (410) may include a mouth end (411), and a device end (not shown) opposite the mouth end (411). The housing (410) may include a mouthpiece (412). The mouthpiece (412) may be positioned at or adjacent to the mouth end (411). The housing (410) may include an airflow path (P) leading to the mouthpiece (412).

The aerosol generating device (400) may include a chamber (420). The chamber (420) may be configured to be coupled into and/or decoupled from the housing (410). The chamber (420) may include a first reservoir (421). The first reservoir (421) may contain a first aerosol generating material (M1). The first aerosol generating material (M1) may comprise a first liquid composition. The chamber (420) may include a second reservoir (422). The second reservoir (422) may contain a second aerosol generating material (M2). The second aerosol generating material (M2) may comprise a second liquid composition. The first liquid composition and the second liquid composition may comprise at least partially identical components. The first liquid composition and the second liquid composition may be composed of different components.

The first reservoir (421) and the second reservoir (422) can be arranged in a circumferential direction (e.g., circumferential direction with respect to the Z-axis) of the housing (410). The first reservoir (421) and the second reservoir (422) can be spaced apart from each other. The airflow path (P) can include a first external airflow channel (P1) defined between one side surface of the first reservoir (421) (e.g., a clockwise side surface with respect to the Z-axis in FIG. 13) and one side surface of the second reservoir (422) (e.g., a counterclockwise side surface with respect to the Z-axis in FIG. 13). The airflow path (P) can include a second external airflow channel (P2) positioned opposite to the first external airflow channel (P1) with respect to an axis (e.g., a central axis or the Z-axis) of the housing (410). A second external airflow channel (P2) may be defined between an opposite side surface (e.g., a counterclockwise side surface with respect to the Z-axis in FIG. 13) of the first reservoir (421) and an opposite side surface (e.g., a clockwise side surface with respect to the Z-axis in FIG. 13) of the second reservoir (422). The first external airflow channel (P1) and the second external airflow channel (P2) may be integrated into a single airflow channel leading to the mouthpiece (412).

In an embodiment not shown, the chamber (420) may include a single reservoir (421 or 422). In an embodiment not shown, the chamber (420) may include three or more reservoirs.

The aerosol generating device (400) may include at least one heater (430). The heater (430) may be configured to generate heat by surface plasmon resonance (SPR). "Surface plasmon resonance" refers to the collective oscillation of electrons propagating along the interface of metal particles with a medium. For example, the collective oscillation of electrons of the metal particles may be generated by light propagating from outside the heater (430). Excitation of the electrons of the metal particles generates thermal energy, and the generated thermal energy may be transferred within an environment to which the heater (430) is applied.

In an embodiment not shown, the aerosol generating device (400) may include a plurality of heaters (430). The plurality of heaters (430) may increase the amount of aerosol generating material delivered from the chamber (420) that is transformed into an aerosol.

The heat generated from the heater (430) can cause the aerosol generating material retained in the wick (440) to change into an aerosol.

The heater (430) may include a substrate (431). The substrate (431) may include a first end (431A) positioned toward the mouth end (411) or the mouthpiece (412). The first end (431A) may be a substantially closed surface or may include a substantially closed surface. The first end (431A) may substantially prevent light from passing through the first end (431A). The substrate (431) may include a second end (431B) positioned toward the device end (not shown). The second end (431B) may be positioned opposite the first end (431A). The second end (431B) may be at least partially open. For example, the second end (431B) may include an opening (431B1). The substrate (431) can include a side portion (431C) extending between a first end portion (431A) and a second end portion (431B). The first end portion (431A), the second end portion (431B), and the side portion (431C) can define a substantially cylindrical shape of the substrate (431). The substrate (431) can include an exterior surface (F1). At least a portion of the exterior surface (F1), such as an exterior side surface, can at least partially face at least one of the first reservoir (421) and the second reservoir (422). The substrate (431) can include an interior surface (F2). The interior surface (F2) can be positioned opposite the exterior surface (F1). The interior surface (F2) can define a cavity (431D). The cavity (431D) can have a substantially cylindrical space.

The substrate (431) may be formed of various materials. For example, the substrate (431) may be formed of a metal material such as aluminum, glass, silicon (Si), silicon oxide (SiO ₂ ), sapphire, polystyrene, polymethyl methacrylate, and/or any other suitable material. The substrate (431) may be formed of any one of glass, silicon (Si), silicon oxide (SiO ₂ ), and sapphire, or a combination thereof. The substrate (431) may include a material having a relatively low heat transfer coefficient. This may allow heat to be transferred only to some areas on the substrate (431).

The substrate (431) may exhibit electrical conductivity. The substrate (431) may also exhibit electrical insulation.

The substrate (431) can be formed of any material having a thermal conductivity suitable for use in an environment in which the heater (430) is placed. For example, the substrate (431) can have a thermal conductivity of about 0.6 W/mK or less, about 1 W/mK to about 2 W/mK, about 2 W/mK to about 5 W/mK, about 5 W/mK to about 10 W/mK, about 10 W/mK to about 100 W/mK, about 100 W/mK to about 200 W/mK at a pressure of 1 bar and a temperature of 25° C. The substrate (431) can have a thermal conductivity of about 0.6 W/mK or less, about 1.3 W/mK, about 148 W/mK, or about 46.06 W/mK at a pressure of 1 bar and a temperature of 25° C.

The heater (430) may include a metal layer (432) disposed on the inner surface (F2). The metal layer (432) may include a plurality of metal particles. Electrons constituting each of the plurality of metal particles may collectively vibrate when receiving light. Excitation of the electrons may generate thermal energy.

The plurality of metal particles can have a nanoscale size. For example, the plurality of metal particles can have an average maximum diameter of less than about 1 μm. The plurality of metal particles can have an average maximum diameter of less than about 700 nm, less than about 600 nm, less than about 500 nm, less than about 400 nm, less than about 300 nm, less than about 200 nm, less than about 150 nm, or less than about 100 nm.

The plurality of metal particles can be formed of any material suitable for generating heat. For example, the plurality of metal particles can include at least one or a combination of gold, silver, copper, palladium, platinum, aluminum, titanium, nickel, chromium, iron, cobalt, manganese, rhodium, and ruthenium.

The plurality of metal particles can be formed of any material suitable for generating heat by interacting with light of a particular wavelength band (e.g., a visible light wavelength band, i.e., from about 380 nm to about 780 nm). For example, the plurality of metal particles can include at least one of gold, silver, copper, palladium, and platinum, or a combination thereof.

The plurality of metal particles can be formed of a metal material having an average maximum absorbance. Here, the average maximum absorbance can be defined as an absorbance having a peak substantially according to a specific wavelength band. The specific wavelength band corresponding to the absorbance can be understood as a wavelength band in which the plurality of metal particles resonate. For example, the plurality of metal particles can be formed of a metal material having an average maximum absorbance in a wavelength band of between about 430 nm and about 450 nm, between about 480 nm and about 500 nm, between about 490 nm and about 510 nm, between about 500 nm and about 520 nm, between about 550 nm and about 570 nm, between about 600 nm and about 620 nm, between about 620 nm and about 640 nm, between about 630 nm and about 650 nm, between about 640 nm and about 660 nm, between about 680 nm and about 700 nm, or between about 700 nm and about 750 nm. The average maximum absorbance of the plurality of metal particles can depend on the type of the substrate (431), the size of the metal layer (432), and/or the shape of the metal layer (432) in addition to the metal material.

The metal layer (432) may be about 10 nm or less. If the metal layer (432) has a thickness exceeding 10 nm, it may reduce the exothermic reaction of the plurality of metal particles forming the metal layer (432), and consequently reduce the thermal efficiency of the heater (430).

The heater (430) may include an absorbing layer (433) configured to absorb light. The absorbing layer (433) may be configured to absorb light transmitting through the substrate (431) in a direction from the inner surface (F2) of the substrate (431) toward the outer surface (F1). The absorbing layer (433) may increase light utilization efficiency of the heater (430). The absorbing layer (433) may be disposed on or over the outer surface (F1). The absorbing layer (433) may be disposed substantially over the entire area of the outer surface (F1). The absorbing layer (433) may also be disposed on a local area of the outer surface (F1), such as an outer side surface. The absorbing layer (433) may be attached to the outer surface (F1). The absorbing layer (433) may be spaced apart from the first reservoir (421) and the second reservoir (422). This can ensure the safety of the aerosol inhaled by the user. The absorbent layer (433) can include a material having a color with relatively high saturation (e.g., black). For example, the absorbent layer (433) can have a heat resistance of about 800 degrees Celsius.

The heater (430) may include a reflective layer (434). The reflective layer (434) may be configured to reflect light transmitting through the substrate (431) in a direction from the inner surface (F2) of the substrate (431) toward the outer surface (F1) toward the inner surface (F2). The reflective layer (434) may be disposed on the absorbing layer (433). In an embodiment not shown, the reflective layer (434) may be spaced apart from the absorbing layer (433) by a gap. The reflective layer (434) may be disposed substantially over the entire area of the absorbing layer (433). The reflective layer (434) may be disposed in a localized area of the absorbing layer (433). The reflective layer (434) may include any material suitable for reflecting light. For example, the reflective layer (434) may include at least one or a combination of gold, silver, copper, or any other metal material suitable for reflection. The reflective layer (434) may have any thickness suitable for reflecting light. For example, the thickness of the reflective layer (434) may be about 10 nm or less.

The heater (430) may include a heat transfer plate (435). The heat transfer plate (435) may be configured to transfer heat generated by surface plasmon resonance to the wick (440). The heat transfer plate (435) may transfer heat in a conductive manner. In an embodiment not shown, a gap may be formed between the heat transfer plate (435) and the wick (440), and the heat transfer plate (435) may transfer heat to the wick (440) in a convective or radiative manner. The heat transfer plate (435) may include a metal material. For example, the heat transfer plate (435) may include aluminum or copper.

The heater (430) may be configured to be separated from the chamber (420). The heater (430) may not be included in a cartridge (e.g., cartridge (19) of FIGS. 1 to 11) that includes the chamber (420). This may reduce the manufacturing cost of the cartridge when manufacturing the cartridge, and may enable semi-permanent use of the heater (430).

The aerosol generating device (400) may include a wick (440). The wick (440) may be configured to transfer an aerosol generating material from the chamber (420) to the heater (430). Heat generated from the heater (430) may cause the aerosol generating material held in the wick (440) to change phase into an aerosol. The wick (440) may include a first wick end (441) connected to at least one of the first reservoir (421) and the second reservoir (422). The wick (440) may include a second wick end (442) opposite the first wick end (441). The second wick end (442) may be substantially coplanar with the second end (431B) of the substrate (431). In an embodiment not shown, the second wick end (442) can be at any location on the outer surface (F1). The wick (440) can include a wick extension (443) extending along the outer surface (F1) (e.g., the outer side surface) between the first wick end (441) and the second wick end (442). The wick extension (443) can be in at least partial contact with the outer surface (F1).

The aerosol generating device (400) may include an optical fiber (450). The optical fiber (450) may be configured to transmit light generated from a light source (not shown) to the heater (430). The optical fiber (450) may be coupled to the opening (431B1). Light passing through the opening (431B1) via the optical fiber (450) may enter the cavity (431D) and may travel toward the inner surface of the substrate (431).

The optical fiber (450) can be tightly coupled to the opening (431B1). This can increase the efficiency of light passing through the optical fiber (450) to be transmitted to the cavity (431D) to about 99%. This allows the amount of light used in the heater (430) to be controlled to a predictable level, which in turn reduces heat loss from the heater (430) and secures thermal stability of the heater (430).

The aerosol generating device (400) may include an internal light source (not shown) configured to emit light. For example, the internal light source may include a laser light source. The internal light source may emit light in the ultraviolet, visible, and/or infrared bands. The aerosol generating device (400) may also utilize an external light source located outside the aerosol generating device (400) without an internal light source.

FIG. 15 is a cross-sectional view of an aerosol generating device according to one embodiment. FIG. 16 is a plan view of an aerosol generating device according to one embodiment. FIG. 17 is an exploded perspective view of a heater, a wick, and a spacer according to one embodiment.

Referring to FIGS. 15 to 17, the aerosol generating device (400-1) may include a housing (410), a chamber (420), and a heater (430-1). The chamber (420) may include a first reservoir (421) and a second reservoir (422). In an embodiment not shown, the chamber (420) may include a single reservoir (421 or 422). In an embodiment not shown, the chamber (420) may include three or more reservoirs.

The heater (430-1) may include a substrate (431-1). The substrate (431-1) may include a first end (431A), a second end (431B), a side (431C), an outer surface (F1), and an inner surface (F2). The inner surface (F2) may define a cavity (431D). The substrate (431-1) may include a groove (G) formed in the side (431C) of the substrate (431-1). The groove (G) may extend from the second end (431B) of the substrate (431-1) to the first end (431A). The groove (G) may extend linearly along the outer surface (F1) of the substrate (431-1). A cross-section of the groove (G) may include a substantially rectangular shape. In an embodiment not shown, the cross-section of the groove (G) may comprise a substantially semicircular shape. The cross-section of the groove (G) may comprise various shapes not shown.

The substrate (431-1) may include a plurality of grooves (G). The plurality of grooves (G) may be substantially parallel to one another. The spacing between two adjacent grooves (G) may be the same as the spacing between two other adjacent grooves (G).

The cross-sectional area of the first groove (G) may be 1/10 or less, 1/15 or less, 1/20 or less, 1/25 or less, 1/30 or less, 1/50 or less, or 1/100 or less of the cross-sectional area of the first end (431A) of the substrate (431-1).

The airflow path (P) may include an internal airflow channel (P3) defined by a groove (G). The internal airflow channel (P3) may be defined by a plurality of grooves (G). The first external airflow channel (P1), the second external airflow channel (P2), and the internal airflow channel (P3) may be integrated into a single airflow channel leading to the mouthpiece (412). In embodiments not shown, the airflow path may include a single external airflow channel (P1 or P2), or may include only the internal airflow channel (P3) without the external airflow channel (P1 or P2).

The internal airflow channel (P3) can be configured to guide the flow of at least a portion of the aerosol generated by the aerosol generating material delivered from the wick (440) and heated by the heater (430-1). The internal airflow channel (P3) can be configured to guide air along the outer surface (F1) in a direction (e.g., +Z direction) from the second end (431B) of the substrate (431-1) toward the first end (431A). The internal airflow channel (P3) can provide a space between the heater (430-1) and the wick (440) in which the aerosol can be generated. The internal airflow channel (P3) can increase the amount by which the heater (430-1) changes the aerosol generating material into an aerosol.

The aerosol generating device (400-1) may include a wick (440). The wick (440) may include a first wick portion (440A) that at least partially faces the first reservoir (421). The first wick portion (440A) may have a first thickness between an inner surface (e.g., a surface facing the spacer (460)) and a surface facing the first reservoir (421).

The wick (440) can include a second wick portion (440B) that at least partially faces the first external airflow channel (P1). The second wick portion (440B) can have a second thickness that is less than the first thickness between an inner surface (e.g., a surface facing the spacer (460)) and a surface facing the first external airflow channel (P1). The aerosol phase-changed in the second wick portion (440B) can be delivered to the first external airflow channel (P1) or the inner airflow channel (P3). The amount of the aerosol generating material phase-changed in the second wick portion (440B) can be greater than the amount of the aerosol generating material phase-changed in the first wick portion (440A). The aerosol generating material delivered from the first storage unit (421) to the first wick portion (440A) can be delivered to the second wick portion (440B) (or the fourth wick portion (440D).

The wick (440) can include a third wick portion (440C) that at least partially faces the second reservoir (422). The third wick portion (440C) can have a third thickness between an inner surface (e.g., a surface facing the spacer (460)) and a surface facing the second reservoir (422).

The wick (440) can include a fourth wick portion (440D) that at least partially faces the second external airflow channel (P2). The fourth wick portion (440D) can have a fourth thickness that is less than the third thickness between an inner surface (e.g., a surface facing the spacer (460)) and a surface facing the second external airflow channel (P2). The aerosol phase-changed in the fourth wick portion (440D) can be delivered to the second external airflow channel (P2) or the inner airflow channel (P3). The amount of the aerosol generating material phase-changed in the fourth wick portion (440D) can be greater than the amount of the aerosol generating material phase-changed in the third wick portion (440C). The aerosol generating material delivered from the second reservoir (422) to the third wick portion (440C) can be delivered to the fourth wick portion (440D) (or the second wick portion (440B).

The first wick portion (440A), the second wick portion (440B), the third wick portion (440C), and the fourth wick portion (440D) can be arranged in the circumferential direction of the housing (410) (e.g., the circumferential direction with respect to the Z-axis).

The first thickness and the third thickness can be substantially the same. The second thickness and the fourth thickness can be substantially the same.

The wick (440) may include a cotton wick configured to absorb a liquid. The wick (440) may include a porous rigid body configured to absorb a liquid. The wick (440) may include a ceramic material.

The aerosol generating device (400-1) may include a spacer (460) disposed between the heater (430-1) and the wick (440) and configured to separate the substrate (431-1) and the wick (440). The spacer (460) may provide a space between the heater (430-1) and the wick (440) in which an aerosol may be generated. The spacer (460) may be configured to transfer heat generated from the heater (430-1) to the wick (440). The spacer (460) may transfer heat in a conduction, convection, or radiation manner.

The spacer (460) may include a plurality of first longitudinal members (461) extending in a direction (e.g., in the +Z direction) from the second end (431B) of the substrate (431-1) toward the first end (431A). The spacer (460) may include a plurality of second longitudinal members (462) extending in a circumferential direction (e.g., in the circumferential direction with respect to the Z axis) of the substrate (431-1) orthogonal to the direction from the second end (431B) toward the first end (431A). The plurality of first longitudinal members (461) and the plurality of second longitudinal members may be intertwined with each other to form a plurality of voids (O). The plurality of voids (O) may provide a space in which an aerosol may be generated.

In an embodiment not shown, each of the plurality of first longitudinal members (461) and the plurality of second longitudinal members (462) can extend in a different direction than in the embodiment shown. In an embodiment not shown, the spacer (460) can include only the first longitudinal members (461) and not the second longitudinal members (462). In an embodiment not shown, the spacer (460) can be positioned to face only a portion of the wick (440) (e.g., the first wick portion (440A), the second wick portion (440B), the third wick portion (440C), or the fourth wick portion (440D)).

The spacer (460) may include a thermal accelerator having relatively high thermal conductivity. The thermal accelerator may increase the amount of heat transferred from the heater (430-1) to the wick (440), thereby increasing the thermal efficiency of the heater (430-1). The thermal accelerator may have a thermal conductivity of about 16 W/mK or more, about 20 W/mK or more, about 29 W/mK or more, about 32 W/mK or more, about 54 W/mK or more, about 70 W/mK or more, about 80 W/mK or more, about 180 W/mK or more, about 250 W/mK or more, about 310 W/mK or more, or about 400 W/mK or more at a pressure of 1 bar and a temperature of 25° C. The spacer (460) may include a metal material. For example, the spacer (460) may include aluminum or copper.

Although not explicitly shown in the drawing, the length along which the first longitudinal member (461) extends in the longitudinal direction may be substantially the same as the length along which the wick extension (443) extends. In an embodiment not shown, the length along which the first longitudinal member (461) extends in the longitudinal direction may be less than the length along which the wick extension (443) extends. In an embodiment not shown, the length along which the first longitudinal member (461) extends in the longitudinal direction may be greater than the length along which the wick extension (443) extends.

FIG. 18 is a drawing showing a heater according to one embodiment.

Referring to FIG. 18, the aerosol generating device (400-2) may include a heater (430-2). The heater (430-2) may include a substrate (431-2). The substrate (431-2) may include a groove (G) extending spirally along an outer surface (F1) of the substrate (431-2). An internal airflow channel (P3) may be defined by the spirally extending groove (G). The aerosol, which is phase-changed due to heat generated from the heater (430-2), may flow spirally along the spirally extending groove (G).

In an embodiment not shown, the groove (G) may extend in any shape (e.g., a serpentine shape) from the second end (431B) to the first end (431A) on the side (431C) of the substrate (431-2).

FIG. 19 is a drawing showing a heater according to one embodiment.

Referring to FIG. 19, the aerosol generating device (400-3) may include a heater (430-3). The heater (430-3) may include a substrate (431). The aerosol generating device (400-3) may include a mount (M) disposed between the substrate (431) and a wick (e.g., the wick (440) of FIGS. 15 to 17). An internal airflow channel (P3) may be disposed in the mount (M). The mount (M) may provide a space between the heater (430-1) and the wick (440) in which an aerosol may be generated.

The mount (M) can include a groove (G). The mount (M) can include a plurality of grooves (G). The groove (G) can at least partially face a wick (e.g., the wick (440) of FIGS. 15-17). An internal airflow channel (P3) can be defined by the groove (G). The groove (G) can extend in a direction substantially parallel to a direction from the second end (431B) of the substrate (431) in the mount (M) to the first end (431A). The groove (G) can guide an aerosol in the mount (M) in a direction from the second end (431B) toward the first end (431A).

In an embodiment not shown, the groove (G) may extend helically from the mount (M). The internal airflow channel (P3) may be defined by the helically extending groove (G).

The mount (M) may be placed on a side (431C) of the substrate (431). The mount (M) may extend from the second end (431B) of the substrate (431) to the first end (431A). The mount (M) may extend linearly along the outer surface (F1) of the substrate (431).

The cross-sectional area of the mount (M) may be 1/2, less than or equal to, 1/5 or less than or equal to, 1/10 or less than or equal to, 1/15 or less than or equal to, 1/20 or less than or equal to, 1/25 or less than or equal to, 1/30 or less than or equal to, 1/50 or less than or equal to, or 1/100 or less than or equal to, the cross-sectional area of the first end (431A) of the substrate (431).

Any of the embodiments or other embodiments of the present disclosure described above are not mutually exclusive or distinct. Any of the embodiments or other embodiments of the present disclosure described above may be combined or used in combination with each other in their respective configurations or functions.

For example, it means that a configuration A described in a particular embodiment and/or drawing can be combined with a configuration B described in another embodiment and/or drawing. That is, even if a combination between configurations is not directly described, it means that a combination is possible, except in cases where a combination is described as impossible.

The above detailed description should not be construed as restrictive in all respects but should be considered as illustrative. The scope of the invention should be determined by a reasonable interpretation of the appended claims, and all changes coming within the equivalent scope of the invention are intended to be embraced within the scope of the invention.

Claims (15)

A chamber comprising a first reservoir configured to hold an aerosol generating material and a first external airflow channel configured to guide the generated aerosol; a wick configured to deliver said aerosol generating material from said chamber, and A heater configured to heat an aerosol generating material delivered from the wick by surface plasmon resonance, wherein the heater comprises: A substrate comprising a first end, a second end opposite the first end, and a side extending between the first end and the second end, wherein the substrate comprises an outer surface and an inner surface opposite the outer surface, A plurality of metal particles arranged on the inner surface, and An internal airflow channel configured to guide air along the outer surface in a direction from the second end toward the first end. The heater comprising An aerosol generating device comprising: In paragraph 1, An aerosol generating device wherein the substrate further includes a groove formed on the side, and the internal airflow channel is arranged in the groove. In the second paragraph, An aerosol generating device wherein the groove extends linearly along the outer surface. In the second paragraph, An aerosol generating device wherein the groove extends spirally along the outer surface. In paragraph 1, An aerosol generating device wherein the substrate further comprises a plurality of grooves, internal airflow channels are arranged in the plurality of grooves, and the plurality of grooves are substantially parallel to one another. In paragraph 1, The above internal airflow channel is an aerosol generating device formed on the outer surface of the substrate. In paragraph 1, An aerosol generating device further comprising a mount disposed between the substrate and the wick, wherein the internal airflow channel is disposed in the mount. In paragraph 1, The above wick is, a first wick portion facing the first storage and having a first thickness, and An aerosol generating device comprising a second wick portion facing the first external airflow channel and having a second thickness less than the first thickness. In Article 8, The above chamber, a second storage unit opposite to the first storage unit, and An aerosol generating device further comprising a second external airflow channel defined between said first reservoir and said second reservoir and opposing said first external airflow channel. In Article 9, The above wick is, a third wick portion facing the second storage and having a third thickness, and An aerosol generating device further comprising a fourth wick portion facing the second external airflow channel and having a fourth thickness less than the third thickness. In Article 10, An aerosol generating device wherein the first wick portion, the second wick portion, the third wick portion, and the fourth wick portion are arranged in the circumferential direction of the substrate. In paragraph 1, The above wick is an aerosol generating device comprising a ceramic material. In paragraph 1, An aerosol generating device further comprising a spacer disposed between the wick and the heater and separating the substrate and the wick. In Article 13, The above spacer, a plurality of first longitudinal members extending in a first direction from the second end toward the first end, and comprising a plurality of second longitudinal members extending in a second direction along the periphery of the substrate; An aerosol generating device in which the plurality of first longitudinal members and the second longitudinal members are entangled with each other to form a plurality of pores. In Article 13, The above spacer is an aerosol generating device including a thermal accelerator.

Images