Aerosol-generating apparatus

Abstract

An aerosol-generating apparatus is disclosed. The aerosol-generating apparatus of the present disclosure comprises: a body having an insertion space with one open side; and a heater including an electrically conductive track. The heater includes: a first heating unit corresponding to a portion of a first area of a stick inserted into the insertion space; and a second heating unit corresponding to a second area of the stick and another portion of the first area, wherein the first heating unit corresponds to a first node that is one end of the electrically conductive track, and a third node located between the first node and a second node that is the other end of the electrically conductive track, the second heating unit corresponds to the second node and the third node, and the first heating unit and the second heating unit are serially connected at the third node.

Description

Aerosol generator

[0001] The present disclosure relates to an aerosol generating device.

[0002] An aerosol generator is designed to extract a specific component from a medium or substance through an aerosol. The medium may contain various components. The components contained in the medium may include various flavoring substances. For example, the components contained in the medium may include nicotine, herbal ingredients, and / or coffee ingredients. Recently, extensive research has been conducted on such aerosol generators.

[0003] Typically, methods for heating the aerosol-generating substance contained in the stick include internal heating, external heating, and induction heating using an induction coil and susceptor. Furthermore, while aerosol generators typically heat a single substance (or region) to generate aerosol, recently, methods for generating aerosol by simultaneously heating multiple substances (or regions) have also been employed to enhance flavor and vaporization.

[0004] Meanwhile, to provide the user with the optimal flavor, the heating level of each substance (or area) contained within the stick may vary. For example, if one area of ​​the stick corresponding to a moisturizer, such as glycerin, is heated at a relatively low temperature, and another area corresponding to a medium is heated at a relatively high temperature, the user can be provided with the optimal flavor.

[0005] When an aerosol generator uses a single heater to heat a stick, it can be difficult to simultaneously heat multiple substances (or multiple regions) to optimal temperatures. For example, if a region of the stick that requires relatively low temperatures is heated to a high temperature, the substance contained within that region may overheat and rapidly deplete, resulting in a reduced taste sensation or a reduced amount of vapor. Furthermore, when an aerosol generator uses multiple heaters to heat a stick, manufacturing costs increase, and the design difficulty and complexity increase.

[0006] The present disclosure aims to solve the above-mentioned and other problems.

[0007] Another object may be to provide an aerosol generating device wherein a single heater may be configured with a plurality of heating elements corresponding to a plurality of areas included in the stick.

[0008] Another object may be to provide an aerosol generating device capable of controlling the degree of heating for each of a plurality of regions included in the stick using a single heater.

[0009] Another object may be to provide an aerosol generating device that can maintain an optimal taste and amount of vapor while using the stick by controlling the degree of heating for each of the plurality of areas included in the stick.

[0010] Another object may be to provide an aerosol generating device capable of optimizing control of current flowing through a plurality of heating elements based on the characteristics of the plurality of heating elements constituting one heater.

[0011] Another object may be to provide an aerosol generating device having a thin film susceptor disposed on a sheet and a heater assembly formed by rolling an electrically conductive pattern together with the sheet.

[0012] Another object may be to provide an aerosol generating device having a structure in which a thin film susceptor can be in direct contact with a stick inserted therein.

[0013] Another object may be to provide an aerosol generating device having a structure in which a sheet surrounds the outside of an electrically conductive pattern multiple times.

[0014] Another object may be to provide an aerosol generating device having a structure in which gaps and steps included in a heater assembly are spaced apart from each other.

[0015] Another object may be to provide an aerosol generating device having brackets capable of securing the top and bottom of the heater assembly.

[0016] Another object may be to provide an aerosol generating device having a structure in which a susceptor and an electrically conductive pattern are attached to a sheet by thermal bonding.

[0017] According to one aspect of the present disclosure for achieving the above-described object, an aerosol generating device comprises: a body having an insertion space with one side opened; and a heater including an electrically conductive track, wherein the heater comprises: a first heating unit corresponding to a part of a first region of a stick inserted into the insertion space; and a second heating unit corresponding to a second region of the stick and another part of the first region, wherein the first heating unit corresponds to a first node which is one end of the electrically conductive track and a third node which is located between the first node and a second node which is the other end of the electrically conductive track, and the second heating unit corresponds to the second node and the third node, and the first heating unit and the second heating unit can be connected in series at the third node.

[0018] According to at least one embodiment of the present disclosure, one heater may be configured with a plurality of heating elements corresponding to a plurality of regions included in the stick.

[0019] According to at least one embodiment of the present disclosure, the degree of heating for each of a plurality of regions included in a stick can be controlled using a single heater.

[0020] According to at least one embodiment of the present disclosure, the heating level for each of a plurality of areas included in the stick can be adjusted to maintain the taste and amount of vaporization while using the stick.

[0021] According to at least one embodiment of the present disclosure, it is possible to optimize control of current flowing through a plurality of heating elements based on characteristics of a plurality of heating elements constituting a single heater.

[0022] According to at least one embodiment of the present disclosure, the heater assembly is formed by a thin film susceptor and an electrically conductive pattern that are rolled together with the sheet, thereby reducing the size of the device.

[0023] According to at least one embodiment of the present disclosure, the heater assembly can be formed by rolling a thin film susceptor and an electrically conductive pattern together with the sheet, thereby simplifying the process for producing the heater assembly.

[0024] According to at least one embodiment of the present disclosure, a thin film susceptor forms an insertion space and comes into direct contact with an inserted stick, thereby increasing the efficiency of heat transfer to the stick.

[0025] According to at least one embodiment of the present disclosure, a heater assembly can be effectively sealed and heat dissipation to the outside can be minimized by having a structure in which a sheet surrounds the outside of an electrically conductive pattern multiple times.

[0026] According to at least one embodiment of the present disclosure, the rigidity of the heater assembly can be secured by providing a bracket capable of fixing the upper and lower parts of the heater assembly.

[0027] According to at least one embodiment of the present disclosure, the susceptor and the electrically conductive pattern are attached to the sheet by thermal bonding, thereby simplifying the bonding structure of the heater assembly.

[0028] Further scope of the applicability of the present disclosure will become apparent from the detailed description below. However, since various modifications and variations within the spirit and scope of the present disclosure will be apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present disclosure, are given by way of example only.

[0029] FIG. 1 and FIG. 2 are drawings illustrating an aerosol generating device according to embodiments of the present disclosure.

[0030] Figure 3 is a block diagram of an aerosol generating device according to one embodiment of the present disclosure.

[0031] FIG. 4 is a drawing illustrating a stick according to one embodiment of the present disclosure.

[0032] FIGS. 5 to 13 are drawings that are referenced in the description of a heater according to various embodiments of the present disclosure.

[0033] Figure 14 is a flowchart illustrating an operation method of an aerosol generating device according to one embodiment of the present disclosure.

[0034] FIG. 15 is a front perspective view of a heater assembly according to one embodiment of the present disclosure.

[0035] FIG. 16 is an exploded perspective view of a heater assembly according to one embodiment of the present disclosure.

[0036] FIG. 17 is a drawing illustrating a susceptor of a heater assembly according to one embodiment of the present disclosure.

[0037] FIGS. 18 and 19 are drawings illustrating an unfolded state of a heater assembly according to one embodiment of the present disclosure.

[0038] FIGS. 20 and 21 are drawings illustrating a bracket of a heater assembly according to one embodiment of the present disclosure.

[0039] FIGS. 22 and 23 are cross-sectional views of a heater assembly according to one embodiment of the present disclosure.

[0040] FIGS. 24 to 26 are drawings illustrating an unfolded state of a heater assembly according to one embodiment of the present disclosure.

[0041] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components are assigned the same reference numerals, and redundant descriptions thereof will be omitted.

[0042] The suffixes "module" and "part" used for components in the following description may be assigned or used interchangeably solely for the convenience of writing the specification. "Module" and "part" do not have distinct meanings or roles in themselves.

[0043] In addition, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of 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 understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the attached drawings. It should be understood that the attached drawings include all modifications, equivalents, and substitutes included within the spirit and technical scope of the present disclosure.

[0044] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components. However, these components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0045] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, although it should be understood that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0046] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0047] Figures 1 and 2 illustrate an aerosol generating device (1) according to embodiments of the present disclosure.

[0048] Referring to FIGS. 1 and 2, an aerosol generating device (1) according to one embodiment may include at least one of a power source (11), a control unit (12), a sensor (13), and a heater (18). At least one of the power source (11), the control unit (12), the sensor (13), and the heater (18) may be disposed inside a body (10) of the aerosol generating device. The body (10) may provide a space opened upwardly so that a stick (S), which is an aerosol generating article, may be inserted. The space opened upwardly may be referred to as an insertion space (43). The insertion space (43) may be formed by being recessed toward the inside of the body (10) by a predetermined depth so that at least a portion of the stick (S) can be inserted. The depth of the insertion space (43) may correspond to the length of a region of the stick (S) containing an aerosol generating material and / or medium. The lower end of the stick (S) is inserted into the inside of the body (10), and the upper end of the stick (S) can protrude outside the body (10). The user can inhale air by putting the upper end of the stick (S) exposed to the outside in his / her mouth.

[0049] The heater (18) can heat the stick (S). The heater (18) can extend upwardly around the space where the stick (S) is inserted. For example, the heater (18) can be in the form of a tube having a hollow space therein. The heater (18) can be arranged around the insertion space (43). The heater (18) can be arranged to surround at least a portion of the insertion space (43). The heater (18) can heat the insertion space (43) or the stick (S) inserted into the insertion space (43). The heater (18) can include an electrical resistance heater and / or an induction heater.

[0050] For example, referring to FIG. 1, the heater (18) may be a resistive heater. For example, the heater (18) may include an electrically conductive track, and the heater (18) may be heated as current flows through the electrically conductive track. The heater (18) may be electrically connected to a power source (11). The heater (18) may be directly heated by receiving current from the power source (11).

[0051] For example, referring to FIG. 2, the aerosol generating device may include an induction coil (181) surrounding a heater (18). The induction coil (181) may heat the heater (18). The heater (18) may be heated by a magnetic field generated by an AC current flowing through the induction coil (181). The magnetic field may penetrate the heater (18) and generate an eddy current within the heater (18). The current may generate heat in the heater (18).

[0052] Meanwhile, a susceptor may be included inside the stick (S), and the susceptor inside the stick (S) may be heated by a magnetic field generated by an AC current flowing through the induction coil (181).

[0053] The power source (11) can supply power to the components of the aerosol generator to operate. 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 heater (18). When the aerosol generator (1) includes an induction coil (181), the power source (11) can supply power to the induction coil (181).

[0054] The control unit (12) can control the overall operation of the aerosol generator. The control unit (12) can be mounted on a printed circuit board. The control unit (12) can control the operation of at least one of the power supply (11) and the sensor (13). The control unit (12) can control the operation of a display, motor, etc. installed in the aerosol generator. The control unit (12) can check the status of each component of the aerosol generator to determine whether the aerosol generator is in an operable state.

[0055] 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 heater (18) so that the operation of the heater (18) 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 heater (18) and the time for which the power is supplied so that the heater (18) can be heated to a predetermined temperature or maintained at an appropriate temperature based on the results detected by the sensor (13).

[0056] The sensor (13) may include at least one of a temperature sensor, a puff sensor, and a stick detection sensor. For example, the sensor (13) may sense at least one of the temperature of the heater (18), the temperature of the power source (11), and the temperature inside and outside the body (10). For example, the sensor (13) may sense the user's puff. For example, the sensor (13) may sense whether the stick (S) is inserted into the insertion space (43).

[0057] Fig. 3 is a block diagram of an aerosol generating device (1) according to one embodiment of the present disclosure.

[0058] The aerosol generator (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 generator (1) is not limited to that illustrated in FIG. 3. That is, a person having ordinary skill in the art related to the present embodiment will understand that, depending on the design of the aerosol generator (1), some of the components illustrated in FIG. 3 may be omitted or new components may be added.

[0059] The sensor (13) can detect the status of the aerosol generator (1) or the status around the aerosol generator (1) and transmit the detected information to the control unit (12). Based on the detected information, the control unit (12) can control the aerosol generator (1) so that various functions such as controlling the operation of the cartridge heater (24) and / or heater (18), restricting smoking, determining whether a stick (S) and / or cartridge (19) is inserted, and displaying a notification are performed.

[0060] The sensor (13) may include at least one of a temperature sensor (131), a puff sensor (132), a stick detection sensor (133), a reuse detection sensor (134), a motion detection sensor (137), and a humidity sensor (138).

[0061] The temperature sensor (131) can detect the temperature at which the cartridge heater (24) and / or the heater (18) is heated. The aerosol generator (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 a temperature sensor.

[0062] 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).

[0063] A 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.

[0064] A temperature sensor (131) is placed inside the body (10) and can detect the internal temperature of the body (10).

[0065] 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 in correspondence to the airflow path through which the gas flows in the aerosol generating device (1).

[0066] The stick detection sensor (133) can detect insertion and / or removal of the stick (S). The stick detection sensor may be referred to as an insertion detection sensor. The stick detection sensor (133) can detect a signal change according to the insertion and / or removal of the stick (S). The stick detection sensor (133) may be installed around the insertion space (43). The stick detection sensor (133) can detect the insertion and / or removal of the stick (S) according to a change in permittivity inside the insertion space (43). For example, the stick detection sensor (133) may be an inductive sensor and / or a capacitance sensor.

[0067] The inductive sensor may include at least one coil. The coil of the inductive sensor may be arranged adjacent to the insertion space (43). For example, when a magnetic field changes around a coil through which a 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.

[0068] An inductive sensor can output a signal corresponding to the characteristics of the current flowing through the coil. For example, an inductive sensor can output a signal corresponding to the inductance value of the coil.

[0069] The capacitance sensor may include a conductor. The conductor of the capacitance sensor may be positioned adjacent to the insertion space (43). The capacitance sensor may output a signal corresponding to the electromagnetic properties of the surroundings, for example, the electrostatic capacitance around the conductor. For example, when a stick (S) including a wrapper made of a metal material is inserted into the insertion space (43), the electromagnetic properties around the conductor may be changed by the wrapper of the stick (S).

[0070] A reuse detection sensor (134) can detect whether the stick (S) has been reused. The reuse detection sensor (134) may be a color sensor. The color sensor can detect the color of the stick (S). The color sensor can detect the color of a portion 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 may be a wavelength of light. The color sensor may be implemented as a single component with the proximity sensor, or may be implemented as a separate component distinct from the proximity sensor.

[0071] At least some of the wrappers constituting the stick (S) may change color due to the aerosol. The reuse detection sensor (134) may be positioned corresponding to a position where at least some of the wrappers whose color changes due to the aerosol are disposed when the stick (S) is inserted into the insertion space (43). 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 at the second color after changing from the first color to the second color.

[0072] A 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.

[0073] The humidity sensor (138) can detect the humidity of the aerosol generator and / or the cartridge. The humidity sensor (138) can detect the humidity of the outside air and / or the humidity inside the cartridge. The humidity sensor (138) can be implemented by a capacitive sensor, etc. The humidity sensor (138) can be placed on the outside of the body (10) or located on a path through which outside air flows in, and can measure the humidity around the aerosol generator (1). The humidity sensor (138) can be located in the storage unit (C1) of the cartridge (19), and can measure the humidity inside the cartridge (19).

[0074] In addition to the sensors (131 to 138) described above, the sensor (13) may further include at least one of a barometric pressure sensor, a magnetic sensor, a position sensor (GPS), and a proximity sensor. Since the functions of each sensor can be intuitively inferred by a person skilled in the art from its name, a detailed description thereof may be omitted.

[0075] The output unit (14) can output information on the status of the aerosol generator (1) and provide it to the user. The output unit (14) may 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 layered structure to form a touch screen, the display unit (141) can be used as an input device in addition to an output device.

[0076] The display (141) can visually provide information about the aerosol generator (1) to the user. For example, the information about the aerosol generator (1) may refer to various information such as the charging / discharging status of the power supply (11) of the aerosol generator (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 upper case, or the status in which the use of the aerosol generator (1) is restricted (e.g., detection of an abnormal item), and the display (141) can output the above information to the outside. For example, the display (141) may be in the form of an LED light-emitting element. For example, the display (141) may be a liquid crystal display panel (LCD), an organic light-emitting display panel (OLED), etc.

[0077] The haptic unit (142) can provide tactile information about the aerosol generator (1) to the user by converting an electrical signal into a mechanical stimulus or an electrical stimulus. 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 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.

[0078] The acoustic output unit (143) can provide information about the aerosol generator (1) to the user audibly. For example, the acoustic output unit (143) can convert an electrical signal into an acoustic signal and output it to the outside.

[0079] The power source (11) can supply power used to operate the aerosol generator (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 generator (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.

[0080] Although not shown in FIG. 3, the aerosol generator (1) may further include a power protection circuit. The power protection circuit may be electrically connected to the power source (11) and include a switching element.

[0081] The power protection circuit can block the power supply (11) according to certain conditions. For example, the power protection circuit can block the power supply (11) when the voltage level of the power supply (11) is higher than a first voltage corresponding to overcharge. For example, the power protection circuit can block the power supply (11) when the voltage level of the power supply (11) is lower than a second voltage corresponding to overdischarge.

[0082] The heater (18) can receive power from the power source (11) and heat the medium or aerosol generating material within the stick (S). Although not shown in FIG. 3, the aerosol generating device (1) may further include a power conversion circuit (e.g., a DC / DC converter) that converts the power of 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 the direct current power of the power source (11) into alternating current power.

[0083] The control unit (12), sensor (13), output unit (14), input unit (15), communication unit (16), and memory (17) can receive power from the power source (11) and perform their functions. Although not shown in FIG. 3, a power conversion circuit, such as an LDO (low dropout) circuit or a voltage regulator circuit, which converts the power of the power source (11) and supplies it to each component may be further included. In addition, although not shown in FIG. 3, a noise filter may be provided between the power source (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 source (11) to the heater (18). By the low pass filter, high frequency noise components can be prevented from being applied to the sensor (13), such as the stick detection sensor (133).

[0084] In one embodiment, the cartridge heater (24) and / or 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 not limited to, a metal heating wire, a metal heating plate having electrically conductive tracks arranged thereon, a ceramic heating element, and the like.

[0085] In another embodiment, the heater (18) may be an induction heating 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 a coil.

[0086] 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.

[0087] The display (141) and the touch panel may be implemented as a single panel. For example, the touch panel may be inserted into the display (141) (on-cell type or in-cell type). For example, the touch panel may be added-on to the display panel (141).

[0088] Meanwhile, the input unit (15) may include, but is not limited to, buttons, key pads, dome switches, jog wheels, jog switches, etc.

[0089] The memory (17) is hardware that stores various data processed in the aerosol generator (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 (e.g., SD or XD memory, etc.), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and an optical disk. The memory (17) may store data on the operation time of the aerosol generator (1), the maximum number of puffs, the current number of puffs, at least one temperature profile, and a user's smoking pattern.

[0090] The communication unit (16) may include at least one component for communication 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.

[0091] 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, an UWB (ultra-wideband) communication unit, an Ant+ communication unit, etc.

[0092] 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.

[0093] Although not shown in FIG. 3, the aerosol generator (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.

[0094] The control unit (12) can control the overall operation of the aerosol generator (1). In one embodiment, the control unit (1) may include at least one processor. The processor may be implemented as an array of multiple logic gates, or may be implemented as a combination of a general-purpose microprocessor and a memory storing a program executable by the microprocessor. Furthermore, it will be understood by those skilled in the art that the present embodiment may be implemented as other types of hardware.

[0095] 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).

[0096] The aerosol generator (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 (181). 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.

[0097] 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.

[0098] 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.

[0099] 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 using a buck-boost converter, a zener diode, etc.

[0100] 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.

[0101] The control unit (12) can control power to be supplied to the heater (18) using at least one of the pulse width modulation (PWM) method and the proportional-integral-differential (PID) method.

[0102] 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.

[0103] For example, the control unit (12) can determine a target temperature that is the target of control based on a temperature profile. The control unit (12) can control the power supplied to the heater (18) by using the 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.

[0104] 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 so that the supply of power to the cartridge heater (24) and / or the heater (18) is cut off 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 certain percentage 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 substance contained in the cartridge (19) is exhausted based on the temperature of the cartridge heater (24) exceeding the limit temperature, and can cut off the supply of power to the cartridge heater (24).

[0105] The control unit (12) can control the charging and discharging of the power source (11). The control unit (12) can check the temperature of the power source (11) based on the output signal of the temperature sensor (131).

[0106] When a power line is connected to the battery terminal of the aerosol generator (1), the control unit (12) can check whether the temperature of the power source (11) is higher than or equal to the first limit temperature, which is a standard for blocking charging of the power source (11). If 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. If the temperature of the power source (11) is higher than or equal to the first limit temperature, the control unit (12) can block charging of the power source (11).

[0107] When the power of the aerosol generator (1) is turned on, the control unit (12) can check whether the temperature of the power source (11) is higher than or equal to the second limit temperature, which is a standard 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 higher than or equal to the second limit temperature, the control unit (12) can stop using the power stored in the power source (11).

[0108] 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).

[0109] The control unit (12) can determine whether a stick (S) is inserted into the insertion space (43) through the stick detection sensor (133). The control unit (12) can determine that the stick (S) is inserted based on the output signal of the stick detection sensor (133). If it is determined that the stick (S) is inserted into the insertion space (43), 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).

[0110] The control unit (12) can determine whether the stick (S) is removed from the insertion space (43). For example, the control unit (12) can determine whether the stick (S) is removed from the insertion space (43) through the stick detection sensor (133). For example, the control unit (12) can determine that the stick (S) is removed from the insertion space (43) 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 (43), the control unit (12) can cut off the power supply to the cartridge heater (24) and / or the heater (18).

[0111] 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.

[0112] 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.

[0113] The control unit (12) can determine whether the stick (S) inserted into the insertion space (43) has been 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) has not been 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) has been used. If it is determined that the stick (S) has been used, the control unit (12) can cut off the supply of power to the cartridge heater (24) and / or the heater (18).

[0114] 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 limited temperature during the preheating period. If the temperature of the cartridge heater (24) exceeds the limited 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).

[0115] The control unit (12) can make a judgment regarding the user's inhalation through the puff sensor (132). For example, the control unit (12) can determine whether a puff has been generated 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).

[0116] 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 generator (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 (43). 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 upper case is not mounted. For example, the control unit (12) can transmit information about the temperature of the cartridge heater (24) and / or the heater (18) to the user through the output unit (14).

[0117] 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 heater (18), detection of overvoltage application to the cartridge heater (24) and / or heater (18), termination of heating of the stick (S), power on / off of the aerosol generator (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. performed in the aerosol generator (1). The history of the event may include the date and 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 stick 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 through the cartridge heater (24) and / or heater (18), etc.

[0118] 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 generator (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 representing the user, etc., and can receive data regarding the use authority of the aerosol generator (1) from an external server. The external device can transmit data indicating completion of user authentication to the aerosol generator (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 generator (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.

[0119] The control unit (12) can transmit data on the status of the aerosol generator (1) to an external device via 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 generator (1), the operation mode, etc. through the display of the external device.

[0120] An external device may transmit a location search request to the aerosol generator (1) based on an input that initiates location search of the aerosol generator (1). When receiving a location search request from the external device, the control unit (12) may 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, in response to the location search request, the haptic unit (142) may generate vibration. For example, in response to the location search request, the display (141) may output an object corresponding to the location search and the end of the search.

[0121] 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 generator (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 generator (1). The control unit (12) can control to perform a firmware update of the aerosol generator (1) upon receiving a new version of the firmware data.

[0122] 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 provided 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, the temperature profile, etc., stored in the memory (17), and generate at least one learning model used for determining the user's suction pattern, generating the temperature profile, etc.

[0123] FIG. 4 is a drawing illustrating a stick according to one embodiment of the present disclosure.

[0124] Referring to FIG. 4, the stick (S) may include an aerosol carrier (510). The stick (S) may include a medium carrier (520). The aerosol carrier (510) and the medium carrier (520) may be referred to as a tobacco rod. The stick (S) may include a cooling carrier (530). The stick (S) may include a filter carrier (540). The stick (S) may include a wrapper (550) surrounding the aerosol carrier (510), the medium carrier (520), the cooling carrier (530), and / or the filter carrier (540). In FIG. 4, the wrapper (550) may include an individual wrapper that surrounds the aerosol carrier (510), the medium portion (520), and the filter portion (540), respectively, and / or an outer shell that encloses the aerosol carrier (510), the medium portion (520), and the filter portion (540) as one, surrounded by individual wrappers.

[0125] The aerosol base (510) may be a portion formed into a predetermined shape by incorporating a moisturizer into pulp-based paper. The moisturizer (base) included in the aerosol base (510) may include propylene glycol, glycerin, or the like. For example, the moisturizer of the aerosol base (510) may include propylene glycol and glycerin at a predetermined weight ratio relative to the weight of the original paper. When the stick (S) is inserted into the aerosol generating device (1) and heated to a temperature above a predetermined temperature by the heater (18), moisturizer vapor may be generated from the aerosol base (510).

[0126] The medium (520) may include one or more of a sheet, a strand, or a tobacco sheet cut into small pieces. The medium (520) may be a part that generates nicotine to provide a smoking experience to a user. When the temperature of the medium included in the medium (520) rises to a temperature above a certain level, nicotine vapor may be generated from the medium (520). When the stick (S) is inserted into the aerosol generating device (1), at least a portion of the aerosol base (510) and at least a portion of the medium (520) may face the heater (18). For example, an upper or downstream portion of the aerosol base (510) and a lower or upstream portion of the medium (520) may face the heater (18).

[0127] The length of the portion of the medium portion (520) facing the heater (18) may be longer than the length of the portion of the aerosol carrier portion (510) facing the heater (18). The length of the portion of the aerosol carrier portion (510) facing the heater (18) may be more than half of the total length of the aerosol carrier portion (510). The length of the portion of the medium portion (520) facing the heater (18) may be more than half of the total length of the medium portion (520).

[0128] The portion of the aerosol base portion (510) and the medium portion (520) facing the heater (18) can be heated by the heater (18). At least a portion of the aerosol base portion (510) containing the moisturizer is heated by the heater (18), thereby generating moisturizer vapor. At least a portion of the medium portion (520) containing the medium is heated by the heater (18), thereby generating nicotine vapor. By arranging the stick (S) so that the length ratios of a portion of the aerosol base portion (510) facing the heater (18) and a portion of the medium portion (520) are different, the ratio of the generated moisturizer vapor and nicotine vapor can be appropriately controlled.

[0129] In one embodiment, the medium portion (520) may not be directly heated by the heater (18) even when the stick (S) is inserted into the aerosol generating device (1). The medium portion (520) may be indirectly heated by conduction, convection, and radiation from the aerosol carrier portion (510) and the medium portion wrapper (or wrappers) surrounding the medium portion (520). The temperature of the medium portion (520) may also be increased indirectly after the aerosol carrier portion (510) is heated by the heater (18).

[0130] The cooling unit (530) may be manufactured as a tube filter containing a predetermined weight of a plasticizer. The moisturizer vapor and nicotine vapor generated from the aerosol base unit (510) and the medium unit (520) may be mixed with each other to form an aerosol, and may be cooled while passing through the cooling unit (530). In one embodiment, unlike the aerosol base unit (510), the medium unit (520), and the filter unit (540), the cooling unit (530) may not be wrapped with an individual wrapper.

[0131] The filter unit (540) may be a cellulose acetate filter. Meanwhile, there is no limitation on the shape of the filter unit (540). The filter unit (540) may be a cylindrical rod or a tube type having a hollow interior. For example, when the filter unit (540) is composed of a plurality of segments, at least one of the segments may be manufactured to have a different shape. The filter unit (540) may also be manufactured to generate a flavor. For example, a flavoring agent may be sprayed onto the filter unit (540), or a separate fiber coated with a flavoring agent may be inserted into the interior of the filter unit (540).

[0132] Additionally, the filter unit (540) may include at least one capsule. Here, the capsule may also perform a function of generating a flavor. For example, the capsule may be a structure that encases a liquid containing a flavoring agent in a film, and may have a spherical or cylindrical shape, but is not limited thereto.

[0133] In one embodiment, the aerosol carrier (510) may not be directly heated by the heater (18) even when the stick (S) is inserted into the aerosol generating device (1). The aerosol carrier (510) may be indirectly heated by conduction, convection, and radiation from a medium carrier wrapper (or wrappers) surrounding the aerosol carrier (510) and the medium carrier (520). The temperature of the aerosol carrier (510) may also be indirectly increased after the medium carrier (520) is heated by the heater (18).

[0134] In one embodiment, the medium portion (520) may include a moisturizer. For example, when a stick (S) is inserted into an aerosol generating device (1) and heated to a temperature above a certain level by a heater (18), a moisturizer vapor may be generated from the medium portion (520). At this time, the amount of the moisturizer included in the aerosol base portion (510) may be greater than the amount of the moisturizer included in the medium portion (520).

[0135] FIGS. 5 to 13 are drawings that are referenced in the description of a heater according to various embodiments of the present disclosure.

[0136] The heater (18) according to embodiments of the present disclosure may be arranged to correspond to a stick (S) inserted into an aerosol generating device (1). The heater (18) may be arranged along the direction in which the stick (S) extends.

[0137] The heater (18) may include a plurality of heater sections (1810, 1820). The plurality of heater sections (1810, 1820) may be connected to each other. The plurality of heater sections (1810, 1820) may be connected in series. The plurality of heater sections (1810, 1820) may be arranged to correspond to at least one area included in the stick (S). For example, the first heater section (1810) may correspond to the aerosol carrier section (510), and the second heater section (1820) may correspond to the medium section (520). For example, the first heater section (1810) may correspond to a part of the aerosol carrier section (510), and the second heater section (1820) may correspond to another part of the aerosol carrier section (510) and the medium section (520). For example, the first heater section (1810) may correspond to a portion of the aerosol carrier section (510) and the medium section (520), and the second heater section (1820) may correspond to another portion of the medium section (520). In the present disclosure, it will be described as an example that the first heater section (1810) corresponds to the aerosol carrier section (510), and the second heater section (1820) corresponds to the medium section (520).

[0138] Referring to FIGS. 5 and 6, the first heater section (1810) may correspond to the entire aerosol carrier section (510), and the second heater section (1820) may correspond to the entire medium section (520).

[0139] The heater (18) may include an electrically conductive track (60). The electrically conductive track (60) may be formed by etching a metal thin film with a laser. The electrically conductive track (60) may receive power from a power source (11) and generate heat. The electrically conductive track (60) may be referred to as a heat generating unit. The resistance value of the electrically conductive track (60) may be 1.0 to 1.2 ohms.

[0140] The electrically conductive track (60) may be made of, but is not limited to, stainless steel, aluminum, or an alloy.

[0141] The electrically conductive track (60) may have a curved shape including bent portions.

[0142] The electrically conductive track (60) may be arranged to correspond to a plurality of heater sections (1810, 1820). The electrically conductive track (60) may include a first track (610) corresponding to the first heater section (1810) and a second track (620) corresponding to the second heater section (1820). The first track (610) and the second track (620) may be connected in series.

[0143] The electrically conductive track (60) may include a first node (a) corresponding to one end, a second node (b) corresponding to the other end, and a third node (c) located between the first node (a) and the second node (b). When voltage is applied between the first node (a) and the second node (b), current may flow throughout the electrically conductive track (60). At this time, the entire electrically conductive track (60) through which current flows may generate heat. Meanwhile, when voltage is applied between the first node (a) and the third node (c), current may flow through some of the electrically conductive tracks (60). At this time, some of the electrically conductive tracks (60) through which current flows may generate heat.

[0144] According to one embodiment of the present disclosure, the third node (c) may correspond to a location where the first track (610) and the second track (620) are connected. When voltage is applied between the first node (a) and the second node (b), the first track (610) and the second track (620) may generate heat. Meanwhile, when voltage is applied between the first node (a) and the third node (c), the second track (620) may generate heat.

[0145] In the present disclosure, a part of a heater (18) that generates heat when a voltage is applied between a first node (a) and a third node (c) may be referred to as a first heat generating unit, and another part of the heater (18) excluding the first heat generating unit may be referred to as a second heat generating unit. For example, when the third node (c) is located at a location where the first track (610) and the second track (620) are connected, the first heat generating unit may be a second heater unit (1820) corresponding to the second track (620), and the second heat generating unit may be a first heater unit (1810) corresponding to the first track (610).

[0146] According to embodiments of the present disclosure, the first track (610) and the second track (620) may have at least one different characteristic. Here, the characteristic may include the width of the pattern forming the electrically conductive track (60), the spacing between the patterns, the material constituting the pattern, the resistance value per unit area of ​​the pattern, etc. In the present disclosure, the target temperature of heating for providing the optimal flavor to the user is described as being higher in the medium portion (520) than in the aerosol base portion (510). For example, the width of the pattern of the first track (610) may be greater than the width of the pattern of the second track (620). For example, the spacing between the patterns of the first track (610) may be greater than the spacing between the patterns of the second track (610). For example, the resistance value per unit area of ​​the pattern of the first track (610) may be less than the resistance value per unit area of ​​the pattern of the second track (620).

[0147] Referring to the drawing reference numeral 601, the spacing (w1) between the patterns of the first track (610) and the spacing (w1) between the patterns of the second track (620) may be the same. Meanwhile, referring to the drawing reference numeral 602, the spacing (w2) between the patterns of the first track (610) may be greater than the spacing (w3) between the patterns of the second track (620). In this case, when the characteristics of the first track (610) and the second track (620) are the same except for the spacing between the patterns, the degree of heat generation per unit area may be greater in the second heater unit (1820) than in the first heater unit (1810). In the present disclosure, an example in which the spacing between the patterns of the first track (610) and the spacing between the patterns of the second track (620) are different will be described.

[0148] Referring to FIGS. 7 and 8, the first heater section (1810) may correspond to a part of the aerosol carrier section (510), and the second heater section (1820) may correspond to a part of the medium section (520).

[0149] The length of the aerosol carrier (510) corresponding to the first heater unit (1810) and the length of the medium unit (520) corresponding to the second heater unit (1820) may be different from each other. Referring to drawing reference numeral 701, the length (710) of the aerosol carrier (510) corresponding to the first heater unit (1810) may be shorter than the length (720) of the medium unit (520) corresponding to the second heater unit (1820). Referring to drawing reference numeral 702, the length (730) of the aerosol carrier (510) corresponding to the first heater unit (1810) may be longer than the length (720) of the medium unit (540) corresponding to the second heater unit (1820).

[0150] The position of the third node (c) can be determined based on the length of the aerosol carrier (510) corresponding to the first heater unit (1810) and the length of the medium unit (520) corresponding to the second heater unit (1820). Referring to drawing reference numeral 801, when the length (710) of the aerosol carrier (510) corresponding to the first heater unit (1810) is shorter than the length (720) of the medium unit (520) corresponding to the second heater unit (1820), the greater the difference between the length (710) of the aerosol carrier (510) corresponding to the first heater unit (1810) and the length (720) of the medium unit (520) corresponding to the second heater unit (1820), the closer the third node (c) can be positioned to the second node (b). Referring to drawing symbol 802, when the length (730) of the aerosol carrier (510) corresponding to the first heater portion (1810) is longer than the length (740) of the medium portion (520) corresponding to the second heater portion (1820), the greater the difference between the length (730) of the aerosol carrier (510) corresponding to the first heater portion (1810) and the length (740) of the medium portion (520) corresponding to the second heater portion (1820), the closer the third node (c) can be positioned to the first node (b).

[0151] Referring to FIGS. 9 and 10, the aerosol generator (1) may include a power supply circuit (910) and / or a switching circuit (920).

[0152] The power supply circuit (910) can supply power to the heater (18). The power supply circuit (910) can include a power source (11). For example, the power supply circuit (910) can output a predetermined voltage. For example, the power supply circuit (910) can output a predetermined current.

[0153] The switching circuit (920) can electrically connect either the second node (b) or the third node (c) to the power supply circuit (910). The switching circuit (920) can include at least one switching element that operates to electrically connect either the second node (b) or the third node (c) to the power supply circuit (910). In the present disclosure, it will be described as an example that the switching circuit (920) includes a first switching element (SW1) corresponding to the second node (b) and a second switching element (SW2) corresponding to the third node (c). Meanwhile, the power supply circuit (910) can be electrically connected to the first node (a).

[0154] Referring to drawing symbol 1001, when the first switching element (SW1) included in the switching circuit (920) is turned off and the second switching element (SW2) is turned on, the second heater unit (1820) on which the second track (620) is arranged may generate heat. At this time, as the second heater unit (1820) generates heat, the medium unit (520) of the stick (S) may be heated.

[0155] Referring to drawing symbol 1002, when the first switching element (SW1) included in the switching circuit (920) is turned on and the second switching element (SW2) is turned off, both the first heater unit (1810) in which the first track (610) is arranged and the second heater unit (1820) in which the second track (620) is arranged can generate heat. At this time, as the first heater unit (1810) and the second heater unit (1820) generate heat, both the aerosol carrier unit (510) and the medium unit (520) of the stick (S) can be heated.

[0156] Referring to FIGS. 11 and 12, according to one embodiment of the present disclosure, the third node (c) may correspond to a position where the second track (620) is divided into a plurality of detailed tracks (621, 622).

[0157] The entire area (R) of the second track (620) may correspond to the second heater section (1820). The area (R1) corresponding to the first detailed track (621) may correspond to a part (1821) of the second heater section (1820), and the area (R2) corresponding to the second detailed track (622) may correspond to another part (1822) of the second heater section (1820).

[0158] When voltage is applied between the first node (a) and the second node (b), the first track (610) and the second track (620) may generate heat. Meanwhile, when voltage is applied between the first node (a) and the third node (c), the first detailed track (621) among the second tracks (620) may generate heat. That is, when the third node (c) is located at a position where the second track (620) is divided into a plurality of detailed tracks (621, 622), the first heating unit may be a part (1821) of the second heater unit (1820) corresponding to the first detailed track (621), and the second heating unit may be the first heater unit (1810) corresponding to the first track (610) and another part (1822) of the second heater unit (1820) corresponding to the second detailed track (622).

[0159] The position of the third node (c) can be determined based on the size of the area (R1) corresponding to the first detailed track (621) and the size of the area (R2) corresponding to the second detailed track (622). Referring to drawing reference numeral 1201, when the size of the area (R1) corresponding to the first detailed track (621) is larger than the size of the area (R2) corresponding to the second detailed track (622), the larger the size of the area (R1) corresponding to the first detailed track (621), the closer the third node (c) can be positioned to the second node (b). Referring to drawing symbol 1202, when the size of the area (R1) corresponding to the first detailed track (621) is smaller than the size of the area (R2) corresponding to the second detailed track (622), the smaller the size of the area (R1) corresponding to the first detailed track (621), the closer the third node (c) can be positioned to the first node (a).

[0160] Referring to the drawing reference numeral 1301 of FIG. 13, when the first switching element (SW1) included in the switching circuit (920) is turned off and the second switching element (SW2) is turned on, a part (1821) of the second heater section (1820) on which the first detailed track (621) is arranged may generate heat. At this time, as a part (1821) of the second heater section (1820) generates heat, a part of the medium section (520) of the stick (S) may be heated.

[0161] Referring to the drawing reference numeral 1302 of FIG. 13, when the first switching element (SW1) included in the switching circuit (920) is turned on and the second switching element (SW2) is turned off, both the first heater unit (1810) in which the first track (610) is arranged and the second heater unit (1820) in which the second track (620) is arranged can generate heat. At this time, as the first heater unit (1810) and the second heater unit (1820) generate heat, both the aerosol carrier unit (510) and the medium unit (520) of the stick (S) can be heated.

[0162] Figure 14 is a flowchart illustrating an operation method of an aerosol generating device according to one embodiment of the present disclosure.

[0163] Referring to Fig. 14, the aerosol generator (1) can perform preheating for the stick (S) in operation S1401. For example, when the insertion of the stick (S) into the insertion space (43) is detected through the stick detection sensor (133), the aerosol generator (1) can supply power to the heater (18) based on the temperature profile corresponding to the preheating stored in the memory (17).

[0164] According to one embodiment, the aerosol generator (1) may supply power to the heater (18) so that the first heating unit of the heater (18) generates heat when preheating the stick (S). When the first heating unit of the heater (18) generates heat, at least a portion of the medium portion (520) of the stick (S) corresponding to the first heating unit may be directly heated. Meanwhile, while preheating the stick (S) is performed, the aerosol carrier portion (510) of the stick (S) may be indirectly heated.

[0165] When only the first heating unit generates heat, the time required for preheating the stick (S) may be shorter than when both the first heating unit and the second heating unit generate heat. At this time, the smaller the size of the first heating unit, the shorter the time required for preheating the stick (S). For example, when a predetermined voltage is applied to the first heating unit, the magnitude of the current flowing to the heater (18) may be larger than when the predetermined voltages are applied to the first and second heating units. At this time, as a relatively large current flows to the first heating unit, the temperature of the first heating unit may rise more quickly. Therefore, the time required for preheating the stick (S) may be shortened.

[0166] The aerosol generator (1) can determine whether preheating of the stick (S) is completed in operation S1402. For example, the aerosol generator (1) can determine that preheating of the stick (S) is completed when the temperature of the heater (18) is higher than the target temperature during preheating. At this time, the temperature of the heater (18) may be the temperature of the first heating unit.

[0167] The aerosol generator (1) may perform some heating of the stick (S) in operation S1403 when preheating of the stick (S) is completed. For example, the aerosol generator (1) may supply power to the heater (18) so that the temperature of the heater (18) corresponds to the target temperature during heating based on the temperature profile corresponding to the heating stored in the memory (17) when preheating of the stick (S) is completed.

[0168] The aerosol generator (1) can supply power to the heater (18) so that the first heating unit of the heater (18) generates heat when performing partial heating of the stick (S). When the first heating unit of the heater (18) generates heat, at least a portion of the medium portion (520) of the stick (S) corresponding to the first heating unit can be directly heated. At this time, when the medium portion (520) includes a moisturizer, moisturizer vapor and nicotine vapor can be generated from at least a portion of the medium portion (520) of the stick (S) corresponding to the first heating unit.

[0169] The aerosol generator (1) can determine, in operation S1404, whether the number of puffs counted through the puff sensor (132) is greater than or equal to a first number. Here, the first number may correspond to the number of puffs in which at least one of the moisturizer vapor and the nicotine vapor decreases below a predetermined level due to exhaustion of a substance included in at least a portion of the medium portion (520) of the stick (S) corresponding to the first heating portion. For example, the aerosol generator (1) can heat the medium portion (520) to a temperature for generating nicotine vapor. At this time, the amount of atomization may be insufficient because the moisturizer included in the medium portion (520) is exhausted relatively earlier than other substances.

[0170] The first number of times may correspond to the size of the first heating unit. For example, as the size of the first heating unit increases, the first number of times may increase. The first number of times may be set based on the ratio of the size of the area (R1) corresponding to the first sub-track (621) of the second track (620) to the size of the entire area (R) of the second track (620). For example, the first number of times may increase as the ratio of the size of the area (R1) corresponding to the first sub-track (621) to the size of the entire area (R) increases. That is, as the area of ​​the medium unit (520) heated by the heat generation of the first heating unit increases, the time required for the material contained in the medium unit (520) to be depleted may increase.

[0171] The aerosol generator (1) can perform full heating of the stick (S) when the number of puffs counted through the puff sensor (132) in operation S1405 is greater than or equal to the first number. When performing full heating of the stick (S), the aerosol generator (1) can supply power to the heater (18) so that both the first heating unit and the second heating unit of the heater (18) generate heat. When both the first heating unit and the second heating unit of the heater (18) generate heat, the aerosol base unit (510) and the medium unit (520) of the stick (S) can be directly heated. Through this, when heating the stick (S) using one heater (18), it is possible to minimize the occurrence of problems such as a decrease in the taste sensation or a decrease in the amount of vaporization due to the humidifier vapor decreasing before the nicotine vapor.

[0172] The aerosol generator (1) can determine, in operation S1406, whether the number of puffs counted through the puff sensor (132) is greater than or equal to a second number. Here, the second number may correspond to the maximum number of puffs that can be used for the stick (S). The second number may be greater than the first number.

[0173] The aerosol generator (1) can determine whether a condition for temporarily stopping heating of the stick (S) (hereinafter, “heating stop condition”) is satisfied when the number of puffs counted through the puff sensor (132) in operation S1407 is less than a second number. Here, the heating stop condition may include a time elapsed in a state in which no puffs are detected (hereinafter, “non-detection time”), a user input received through the input unit (15), etc. For example, when the non-detection time is longer than a first time (e.g., 30 seconds), the heating stop condition may be satisfied. For example, when a user input for temporarily stopping heating is received through a button included in the input unit (15), the heating stop condition may be satisfied.

[0174] The aerosol generator (1) may perform some heating on the stick (S) when the heating interruption condition is satisfied in operation S1408. According to one embodiment, the aerosol generator (1) may supply power to the heater (18) so that the temperature of the heater (18) corresponds to a predetermined temperature lower than the target temperature during heating. Through this, problems such as unnecessary consumption of a substance contained in the stick (S) or a change in taste due to the stick (S) being continuously heated to a high temperature while no puff is detected can be minimized.

[0175] Meanwhile, the aerosol generator (1) can perform full heating on the stick (S) if the heating interruption condition is not satisfied. For example, the aerosol generator (1) can perform full heating on the stick (S) if a puff is detected again through the puff sensor (132). For example, the aerosol generator (1) can perform full heating on the stick (S) if a user input for resuming heating is received through a button included in the input unit (15).

[0176] The aerosol generator (1) can determine, in operation S1409, whether a condition for terminating heating of the stick (S) (hereinafter, referred to as a heating termination condition) is satisfied. Here, the heating termination condition may include a non-detection time, a user input received through the input unit (15), etc. For example, if the non-detection time is a second time (e.g., 1 minute) or longer, the heating termination condition may be satisfied. For example, if a user input for turning off the power is received through a button included in the input unit (15), the heating termination condition may be satisfied. For example, if the removal of the stick (S) from the insertion space (43) is detected through the stick detection sensor (133), the heating termination condition may be satisfied.

[0177] The aerosol generator (1) can terminate heating of the stick (S) in operation S1410. The aerosol generator (1) can cut off the power supply to the heater (18).

[0178] According to one embodiment of the present disclosure, the aerosol generator (1) may perform full heating of the stick (S) when preheating of the stick (S) is completed. For example, when the first heating unit is the second heater unit (1820) corresponding to the second track (620) and the second heating unit is the first heater unit (1810) corresponding to the first track (610), power may be supplied to the heater (18) such that the second heater unit (1820) generates heat when preheating the stick (S) and the first heater unit (1810) and the second heater unit (1820) generate heat when preheating the stick (S) is completed.

[0179] According to one embodiment of the present disclosure, the aerosol generator (1) may alternately perform partial heating of the stick (S) and full heating of the stick (S) based on the number of times the puff is detected by the puff sensor (132). For example, the aerosol generator (1) may alternately perform partial heating of the stick (S) and full heating of the stick (S) when the number of puffs is less than a third number that is less than a second number, and may perform full heating of the stick (S) when the number of puffs is the third number or more.

[0180] FIG. 15 is a front perspective view of a heater assembly according to one embodiment of the present disclosure, FIG. 16 is an exploded perspective view of a heater assembly according to one embodiment of the present disclosure, and FIG. 17 is a drawing illustrating a susceptor of a heater assembly according to one embodiment of the present disclosure.

[0181] Referring to FIG. 15, the heater (18) may include a heater assembly (30). The heater assembly (30) may be elongated. The heater assembly (30) may have a tubular shape or a cylindrical shape including a hollow portion therein. The heater assembly (30) may be disposed within the body (10) of the aerosol generator (1). The heater assembly (30) may surround the insertion space (43). The heater assembly (30) may provide the insertion space (43). The insertion space (43) or a stick (S) inserted into the insertion space (43) may be heated by the heater assembly (30). The heater assembly (30) may have a lead (63, see FIG. 18) that protrudes outward and is electrically connected to the power source (11).

[0182] The heater (18) may include a pair of brackets (91, 92). The pair of brackets (91, 92) may be coupled to the top and bottom of the heater assembly (30), respectively. The pair of brackets (91, 92) may be coupled to the heater assembly (30) to support the heater assembly (30).

[0183] Referring to FIGS. 16 and 17, the heater assembly (30) may include a sheet (40), a susceptor (50), and an electrically conductive track (60).

[0184] The susceptor (50) may be a cylindrical shape formed by rolling a thin metal sheet. The susceptor (50) may be referred to as a heat transfer element, a heat conducting portion, a heat spreading portion, or a pipe. The susceptor (50) may be made of, but is not limited to, stainless steel, aluminum, or an alloy.

[0185] The thin-film metal sheet may be elongated in one direction and may be a rectangle with a length (L1) greater than a width (W1). The length and width of the thin-film metal sheet may be defined by the length and width of the susceptor (50), respectively. The length (L1) of the susceptor (50) may be 17.5 mm to 27.5 mm, and the width (W1) of the susceptor (50) may be 10 mm to 20 mm. Preferably, the length (L1) of the susceptor (50) may be 20 mm to 25 mm, and the width (W1) of the susceptor (50) may be 12.5 mm to 17.5 mm. The susceptor (50) may have a cylindrical shape and a diameter (D1) of 7 mm to 8 mm.

[0186] In the circumferential direction of the susceptor (50) or the circumferential direction of the insertion space (43), one end (51) of the susceptor (50) may be spaced apart from the other end (52) of the susceptor (50). A gap (G1) may be formed between the one end (51) and the other end (52) of the susceptor. The width of the gap (G1) may be 0.5 mm or less. As the width of the gap (G1) increases, the area of ​​the portion of the stick (S) that is not heated by the gap (G1) may increase. Therefore, 0.5 mm may correspond to the maximum width at which the aerosol generated from the stick (S) is greater than or equal to a set minimum amount.

[0187] Accordingly, when rolling a thin film sheet to form a cylindrical shape of a susceptor (50), it is possible to prevent the shape of the susceptor (50) from being distorted or parts of the susceptor (50) from overlapping each other due to errors in the assembly process.

[0188] The electrically conductive track (60) may have a rounded cylindrical shape.

[0189] The electrically conductive track (60) may be elongated in one direction and may be rectangular in shape with a length (L2) greater than a width (W2). The length (L2) of the electrically conductive track (60) may be 18 mm to 28 mm, and the width (W2) of the electrically conductive track (60) may be 10 mm to 20 mm. Preferably, the length (L2) of the electrically conductive track (60) may be 20.5 mm to 25.5 mm, and the width (W2) of the electrically conductive track (60) may be 12.5 mm to 17.5 mm.

[0190] The sheet (40) can be elongated. A susceptor (50) and an electrically conductive track (60) can be attached to the sheet (40). The susceptor (50) and the electrically conductive track (60) can be rolled along the length of the sheet (40) together with the sheet (40). The sheet (40) can form a plurality of layers in the hollow heater assembly (30). The sheet (40) can form at least one layer surrounding the susceptor (50) on the outside of the susceptor (50) and at least one layer surrounding the electrically conductive track (60) on the outside of the electrically conductive track (60).

[0191] The sheet (40) is a flexible sheet and may be formed of a heat-resistant material. The sheet (40) may include, but is not limited to, polyimide or polyetheretherketone (PEEK), and may include other materials having elasticity, heat resistance, and electrical insulation.

[0192] The length (L0) of the sheet (40) may be 115 mm to 165 mm, and the width (W0) of the sheet (40) may be 15 mm to 25 mm. Preferably, the length (L0) of the sheet (40) may be 130 mm to 150 mm, and the width (W0) of the sheet (40) may be 17.5 mm to 22.5 mm. The features of the susceptor (50) and the electrically conductive track (60) being arranged on the sheet (40) are described in detail with reference to FIGS. 18 and 19.

[0193] FIGS. 18 and 19 are drawings showing an unfolded state of a heater assembly according to one embodiment of the present disclosure.

[0194] Referring to FIGS. 18 and 19, the heater assembly (30) may include a sheet (40), a susceptor (50), and an electrically conductive track (60). The susceptor (50) and the electrically conductive track (60) may be disposed on the sheet (40). The susceptor (50) and the electrically conductive track (60) may be sequentially disposed in the longitudinal direction of the sheet (40).

[0195] The electrically conductive track (60) may include a heating track (61) and a connecting portion (62). The heating track (61) may include a plurality of tracks (610, 620).

[0196] The connecting portion (62) may protrude outward from one side of the heating track (61). The connecting portion (62) may be formed integrally with the heating track (61). The connecting portion (62) may include a first connecting portion (62a), a second connecting portion (62b), and a third connecting portion (62c). The first connecting portion (62a) may be connected to the first node (a), the second connecting portion (62b) may be connected to the second node (b), and the third connecting portion (62c) may be connected to the third node (c).

[0197] A lead (63) may be connected to the connection portion (62). The lead (63) may extend in a long direction in which the connection portion (62) protrudes. The lead (63) may electrically connect the connection portion (62) to a power source (11), a power supply circuit (910), and / or a switching circuit (920). The temperature coefficient of resistance (TCR) of the lead (63) may be manufactured from a material lower than the temperature coefficient of resistance of the electrically conductive track (60). The lead (63) may be attached to the connection portion (62) by welding, but is not limited thereto.

[0198] Accordingly, the temperature change of the electrically conductive track (60) derived based on the resistance change of the electrically conductive track (60) can be accurately measured.

[0199] The susceptor (50) and the electrically conductive track (60) may be arranged on the same side of the sheet (40). The sheet (40) may be a single sheet that extends in one direction or the x direction. The sheet (40) may include a flat first side (41) and a second side (42) that forms a side opposite to the first side (41) in the thickness direction. The susceptor (50) and the electrically conductive track (60) may be arranged on the first side (41) of the sheet (40). The sheet (40) may be rolled such that the first side (41) faces the central axis or insertion space (43) of the hollow heater assembly (30) (see FIG. 22). The heater assembly (30) may be formed by rolling the susceptor (50) and the electrically conductive track (60) together with the sheet (40).

[0200] When an elastic object is rolled into a ball, springback may occur. When deformation is applied to an object, the object has a property of resisting deformation. Springback can be defined as a phenomenon that occurs due to a restoring force that resists deformation. When the susceptor (50) and the electrically conductive track (60) are arranged on the same side of the sheet (40), the springback may be smaller than when the susceptor (50) and the electrically conductive track (60) are arranged on different sides of the sheet (40).

[0201] Accordingly, the springback occurring during the assembly process of the hollow heater assembly (30) can be reduced, thereby reducing defects in the heater assembly.

[0202] The susceptor (50) may be arranged adjacent to one end of the sheet (40) in the longitudinal direction of the sheet (40). One end (51) of the susceptor (50) may be aligned parallel to one end of the sheet (40). The susceptor (50) may be arranged spaced apart from the electrically conductive track (60). For example, the electrically conductive track (60) may be arranged spaced apart from the susceptor (50) in the longitudinal direction of the sheet (40). One end of the electrically conductive track (60) may be spaced apart from the other end (52) of the sheet (40) by a predetermined distance (A1). The upper end (53) of the susceptor (50) may be aligned with the upper end of the electrically conductive track (60). The lower end (54) of the susceptor (50) may be aligned with the lower end of the electrically conductive track (60).

[0203] The width (W0) of the sheet (40) may be greater than the width (W1) of the susceptor (50) and the width (W2) of the electrically conductive track (60). The susceptor (50) and the electrically conductive track (60) may be arranged closer to the top than to the bottom of the sheet (40) in the width direction or y direction of the sheet (40). The distance (A2) at which the top (53) of the susceptor (50) and / or the top of the electrically conductive sheet (60) is spaced from the top of the sheet (40) may be smaller than the distance (A3) at which the bottom (54) of the susceptor (50) and / or the bottom of the electrically conductive sheet (60) is spaced from the bottom of the sheet (40).

[0204] The distance (A1) at which the susceptor (50) is spaced apart from the electrically conductive track (60) in the longitudinal direction of the sheet (40) may be smaller than the length (L2) of the electrically conductive track (60) defined in the longitudinal direction of the sheet (40). The susceptor (50) and the electrically conductive track (60) may be electrically insulated from each other by the sheet (40). As the distance (A1) at which the susceptor (50) is spaced apart from the electrically conductive track (60) increases, the number of sheet (40) layers arranged between the susceptor (50) and the electrically conductive track (60) in the hollow heater assembly (30) may increase, or the area of ​​the sheet (40) may increase. When the distance (A1) between the susceptor (50) and the electrically conductive track (60) is smaller than the length (L2) of the electrically conductive track (60), the number of layers of sheets (40) arranged between the susceptor (50) and the electrically conductive track (60) may be two or less.

[0205] Accordingly, heat generated in the electrically conductive track (60) can be more efficiently transferred to the susceptor (50).

[0206] In the longitudinal direction of the sheet (40), the length (L2) of the electrically conductive track (60) may be greater than the length (L1) of the susceptor (50). In the hollow heater assembly (30), the electrically conductive track (60) may surround the susceptor (50) on the outside of the susceptor (50). Since the length (L2) of the electrically conductive track (60) is greater than the length (L1) of the susceptor (50), the area of ​​the portion where the electrically conductive track (60) surrounds the susceptor (50) may be increased.

[0207] Accordingly, the area through which heat is transferred from the electrically conductive track (60) to the susceptor (50) increases, and the insertion space (43) or the stick (S) within the insertion space (43) can be heated more evenly by the susceptor (50) and the electrically conductive track (60). In addition, the area of ​​the electrically conductive track (60) increases, thereby increasing the degree of design freedom for the track shape.

[0208] The sheet (40) may include first to fourth parts (40a, 40b, 40c, 40d). A susceptor (50) may be arranged in the first part (40a). An electrically conductive track (60) may be arranged in the second part (40b). A third part (40c) may be arranged between the first part (40a) and the second part (40b) in the longitudinal direction of the sheet (40) and may be connected to the first part (40a) and the second part (40b). A fourth part (40d) may extend from the second part (40b) in the longitudinal direction of the sheet (40) and may face the third part (40c) with respect to the second part (40b). The sheet (40) may be rolled in a direction from one end of the first part (40a) toward one end of the fourth part (40d). In the hollow heater assembly (30), the second part (40b) can be placed on the outside of the first part (40a), and the fourth part (40d) can be placed on the outside of the second part (40b).

[0209] The susceptor (50) and the electrically conductive track (60) can be attached to the sheet (40) by thermal bonding. The susceptor (50) and the electrically conductive track (60) are respectively placed on the first surface (41) of the first part (40a) and the second part (40b) of the sheet (40), and by heating the sheet (40), the susceptor (50), and the electrically conductive track (60) to a certain temperature or higher, the susceptor (50) and the electrically conductive track (60) can be attached to the sheet (40).

[0210] Accordingly, the bonding structure of the heater assembly can be simplified.

[0211] The thickness (T1) of the susceptor (50) may be 0.01 to 0.03 mm. The thickness (T2) of the electrically conductive track (60) may be 0.03 to 0.05 mm. The thickness (T0) of the sheet (40) may be 0.015 to 0.035 mm. The thickness (T2) of the electrically conductive track (60) may be greater than the thickness (T0) of the sheet (40) and the thickness (T1) of the susceptor (50). The thickness (T0) of the sheet (40) may be greater than the thickness (T1) of the susceptor (50). The thin-film susceptor (50) and the electrically conductive track (60) may be rolled together with a thin sheet (40) to form a hollow heater assembly (30).

[0212] Accordingly, the size of the hollow heater assembly (30) can be reduced, thereby reducing the size of the aerosol generator (1). In addition, the process for producing the heater assembly (30) can be simplified, and the manufacturing cost can be reduced.

[0213] In addition, since the thickness (T0) of the sheet (40) is formed to be greater than the thickness (T1) of the susceptor (50), the susceptor (50) and the electrically conductive track (60) can be prevented from being electrically shorted. In addition, since the thickness (T2) of the electrically conductive track (60) is formed to be greater than the thickness (T1) of the susceptor (50), the electrically conductive track (60) can stably support the outer side of the susceptor (50) and provide more heat to the susceptor (50).

[0214] FIG. 20 and FIG. 21 are drawings illustrating a bracket according to one embodiment of the present disclosure.

[0215] Referring to FIG. 20 together with FIGS. 15 and 16, the heater assembly (30) can be coupled with brackets (91, 92). The first bracket (91) can be attached or coupled to the upper side of the heater assembly (30) corresponding to the opening of the insertion space (43). The first bracket (91) can include a first bracket body (911), a first flange (912), an insertion hole (913), and an alignment groove (914).

[0216] The first bracket body (911) may have a cylindrical shape. The outer diameter (D2) of the first bracket body (911) may be equal to or larger than the diameter of the upper portion of the heater assembly (30). The first bracket body (911) may extend in the circumferential direction. The first bracket body (911) may be attached to or press-fitted to the upper portion of the heater assembly (30). The first flange (912) may protrude radially outward from the upper end of the first bracket body (911). The first flange (912) may extend in the circumferential direction. The first flange (912) may surround the upper end of the first bracket body (911). The insertion hole (913) may be formed to vertically penetrate the central portion of the first bracket (91). The boundary between the first flange (912) and the first bracket body (911) may have a convexly bent shape from the inner surface of the first bracket body (911) to the upper surface of the first flange (912). The alignment groove (914) may be formed by recessing one side of the flange (912) in a radially inward direction. The alignment groove (914) may have a shape corresponding to a protrusion provided on the body (10). The alignment groove (914) may be coupled to the protrusion provided on the body (10). The heater assembly (30) may be prevented from rotating in the body (10) by the alignment groove (914), and the heater assembly (30) may be stably coupled to the body (10). The first bracket (91) may be made of, but is not limited to, stainless steel, aluminum, or an alloy.

[0217] Referring to FIG. 21 together with FIGS. 15 and 16, a second bracket (92) may be attached or coupled to the lower side of the heater assembly (30). The second bracket (92) may include a second bracket body (921), a second flange (922), and a hole (924).

[0218] The second bracket body (921) may have a cylindrical shape. The outer diameter of the second bracket body (921) may be equal to or larger than the diameter of the lower portion of the heater assembly (30), and the inner diameter (D3) of the second bracket body (921) may be smaller than the diameter of the lower portion of the heater assembly (30). The second bracket body (921) may extend in the circumferential direction. The second bracket body (921) may be attached to or press-fitted to the lower portion of the heater assembly (30). The second flange (922) may protrude radially outward from the lower end of the second bracket body (921). The second flange (922) may extend in the circumferential direction. The second flange (922) may surround the lower end of the second bracket body (921). The hole (924) may be formed to penetrate the central portion of the second bracket (92) upwardly and downwardly. The second bracket (92) may be made of polyetheretherketone (PEEK), but is not limited thereto.

[0219] The first bracket (91) and the second bracket (92) can support the upper and lower portions of the heater assembly (30), respectively. The upper portion of the heater assembly (30) can be fixed or supported by the first bracket (91). The lower portion of the heater assembly (30) can be fixed or supported by the second bracket (92).

[0220] Accordingly, the susceptor (50), the electrically conductive track (60), and the sheet (40) can be stably fixed at both ends of the heater assembly (30) formed by rolling, thereby ensuring the rigidity of the heater assembly (30).

[0221] FIGS. 22 and 23 are cross-sectional views of a heater assembly according to one embodiment of the present disclosure. FIG. 22 illustrates a cross-section of the heater assembly along line AA of FIG. 15, and FIG. 23 illustrates a cross-section of the heater assembly along line BB of FIG. 15.

[0222] Referring to FIG. 22, the susceptor (50) may be located at the innermost side of the hollow heater assembly (30). An insertion space (43) may be arranged inside the susceptor (50). The susceptor (50) may form at least a portion of the insertion space (43). The susceptor (50) may surround at least a portion of the insertion space (43). An inner peripheral surface of the susceptor (50) may be exposed to the insertion space (43). The susceptor (50) may face a stick (S) inserted into the insertion space (43). At least a portion of the inner peripheral surface of the susceptor (50) may contact an outer peripheral surface of the stick (S) inserted into the insertion space (43).

[0223] Accordingly, the thin film susceptor forms at least a portion of the insertion space and comes into direct contact with the stick inserted into the insertion space, thereby increasing the heat transfer efficiency to the stick.

[0224] The susceptor (50) and the electrically conductive track (60) can be spaced apart from the upper and lower portions of the sheet (40). In the hollow heater assembly (30), the first part (40a) and the second part (40b) can contact each other at the upper and lower portions. The upper and lower portions of the first part (40a) and the second part (40b) contact each other, and the electrically conductive track (60) can be sealed from the outside by the structure in which the first to fourth parts (40a, 40b, 40c, 40d) are rolled.

[0225] The hollow heater assembly (30) can be coupled with the brackets (91, 92). The brackets (91, 92) can be bonded or press-fitted to the heater assembly (30). When the hollow heater assembly (30) is coupled with the brackets (91, 92), the heater assembly (30) and the brackets (91, 92) can be heated to a temperature higher than a certain temperature.

[0226] Accordingly, the heater assembly can be sealed from the outside, and heat generated from the electrically conductive pattern can be minimized from being released outside the heater assembly.

[0227] The insertion hole (913) of the first bracket (91) can communicate with the upper side of the insertion space (43). The hole (924) of the second bracket (92) can communicate with the lower side of the insertion space (43). The stick (S) can be inserted into the insertion space (43) through the insertion hole (913). Outside air can be introduced from the outside of the heater assembly (30) through the end of the stick (S) into the inside of the stick (S) through the hole (924). The inner circumference of the first bracket body (911) can support at least a part of the outer circumference of the stick (S) inserted into the insertion space (43). The upper surface (923) of the second bracket body (921) can support at least a part of the lower side of the stick (S) inserted into the insertion space (43). In the longitudinal direction of the insertion space (43), the first bracket (91) and the second bracket (92) can be spaced apart from the susceptor (50). In the longitudinal direction of the insertion space (43), the lower end of the first bracket body (911) can be spaced apart from the upper end (53) of the susceptor (50), and the upper end of the second bracket body (921) can be spaced apart from the lower end (54) of the susceptor (50).

[0228] A stick detection sensor (133) may be disposed in the heater assembly (30). The stick detection sensor (133) may detect insertion and / or removal of the stick (S). For example, the stick detection sensor (133) may be an inductive sensor and / or a capacitance sensor. The stick detection sensor (133) may be disposed adjacent to the lower end of the insertion space (43). The stick detection sensor (133) may be disposed to surround at least a portion of the lower side of the heater assembly (30). The stick detection sensor (133) may be disposed to contact the fourth part (40d) or the outermost layer of the sheet (40) and surround the fourth part (40d) or the outermost layer. In the longitudinal direction of the insertion space (43), the stick detection sensor (133) may be disposed below the susceptor (50) and the electrically conductive track (60). In the longitudinal direction of the insertion space (43), the stick detection sensor (133) can be spaced apart from the susceptor (50) and the electrically conductive track (60).

[0229] Accordingly, heat transferred to the sensor (133) by the susceptor (50) and the electrically conductive track (60) can be minimized. In addition, the accuracy of stick (S) detection by the sensor (133) can be increased.

[0230] Referring to FIG. 23 together with FIG. 22, the heater assembly (30) may be formed in layers in the order of a susceptor (50), a first part (40a) and / or a third part (40c) of a sheet (40), an electrically conductive track (60), and a fourth part (40d) in the radially outer direction from the insertion space (43).

[0231] At least a portion of the sheet (40) may be disposed between the susceptor (50) and the electrically conductive track (60) and form at least one layer between the susceptor (50) and the electrically conductive track (60). For example, the first part (40a) may be in contact with the susceptor (50) and surround the outside of the susceptor (50). At least a portion of the sheet (40) may be disposed on the outside of the electrically conductive track (60) and form at least one layer on the outside of the electrically conductive track (60). For example, the second part (40b) may be in contact with the electrically conductive track (60) and surround the outside of the electrically conductive track (60). For example, the fourth part (40d) may be in contact with the second part (40b) and surround the outside of the second part (40b) and the electrically conductive track (60).

[0232] The length of the fourth part (40d) defined in the longitudinal direction of the sheet (40) (see FIG. 8) may be greater than the length (L2) of the electrically conductive track (60). For example, the length of the fourth part (40d) may be at least one time the length (L2) of the electrically conductive track (60). The fourth part (40d) may surround the outside of the second part (40b) and the electrically conductive track (60) by at least one turn. The fourth part (40d) may form at least one layer (40d1) surrounding the outside of the second part (40b) and the electrically conductive track (60). The second part (40b) and the fourth part (40d) may form at least two layers surrounding the outside of the electrically conductive track (60). For example, the length of the fourth part (40d) may be at least four times the length (L2) of the electrically conductive track (60). The fourth part (40d) may surround the outside of the second part (40b) and the electrically conductive track (60) by at least four turns. The fourth part (40d) may form at least four layers (40d1, 40d2, 40d3, 40d4) surrounding the outside of the second part (40b) and the electrically conductive track (60). The second part (40b) and the fourth part (40d) may form at least five layers surrounding the outside of the electrically conductive track (60).

[0233] In a structure in which one sheet (40) is rolled to form a plurality of layers, a step may be formed at a portion where one layer is connected to another layer. For example, a step may be formed in a heater assembly (30) at a position where one end and the other end of an electrically conductive track (60) in the longitudinal direction are arranged. A step may be formed in a heater assembly (30) at a position where one end and the other end of an electrically conductive track (60) are arranged in the circumferential direction of an insertion space (43). The step may be referred to as a first step portion (SP1). For example, a gap (G1) may be formed between one end (51) and the other end (52) of a susceptor (50) in the circumferential direction of an insertion space (43) (see FIGS. 5 and 6), and a step may be formed in a heater assembly (30) at a position where the gap (G1) is formed in the circumferential direction of an insertion space (43). The corresponding step can be called the second step (SP2).

[0234] In the radial direction of the insertion space (43) or the radial direction of the heater assembly (30), the first step (SP1) may be arranged to be misaligned with the gap (G1) or the second step (SP2). In the radial direction of the insertion space (43) or the radial direction of the heater assembly (30), the first step (SP) may not overlap with the gap (G1) or the second step (SP2).

[0235] Compared to other parts surrounding the insertion space (43), heat may not be evenly transferred to the insertion space (43) from the first step portion (SP1) and the second step portion (SP2). As the aerosol generator (1) is repeatedly used, the degree to which the first step portion (SP1) and the second step portion (SP2) deteriorate may be different from the degree to which other parts surrounding the insertion space (43) deteriorate. When the first step portion (SP1) and the second step portion (SP2) are arranged to overlap each other, the degree to which the relevant part deteriorates may differ significantly from the degree to which other parts deteriorate. In addition, a specific part of the stick (S) inserted into the insertion space (43) may not be properly heated, and the relevant part may be more vulnerable to external impact than other parts.

[0236] Since the first step portion (SP1) and the second step portion (SP2) are arranged to be offset from each other in the radial direction of the insertion space (43), it is possible to prevent deterioration from progressing differently in each section of the heater assembly (30), and to evenly heat the stick (S) inserted into the insertion space (43). In addition, it is possible to minimize damage to the heater assembly (30) due to external impact.

[0237] Figures 24 to 26 are drawings illustrating an unfolded state of a heater assembly according to one embodiment of the present disclosure. Detailed descriptions of features common to the heater assembly of Figures 18 and 19 are omitted.

[0238] Referring to FIGS. 24 to 26, the heater assembly (30) may include a sheet (40), a susceptor (50), and an electrically conductive track (60). The susceptor (50) and the electrically conductive track (60) may be disposed on the sheet (40).

[0239] The susceptor (50) and the electrically conductive track (60) can be arranged on different sides of the sheet (40). The susceptor (50) can be arranged on a first side (41) of the sheet (40). The electrically conductive track (60) can be arranged on a second side (42) of the sheet (40). The sheet (40) can be rolled so that the first side (41) faces the central axis or insertion space (43) of the hollow heater assembly (30).

[0240] The susceptor (50) can be arranged adjacent to one end of the sheet (40) in the longitudinal direction of the sheet (40). One end (51) of the susceptor (50) can be aligned parallel to one end of the sheet (40). The electrically conductive track (60) can be arranged spaced apart from one end of the sheet (40) in the longitudinal direction of the sheet (40). One end of the electrically conductive track (60) can be arranged spaced apart from one end (51) of the susceptor (50) in the longitudinal direction of the sheet (40). One end of the electrically conductive track (60) in the longitudinal direction of the sheet (40) can be arranged between one end (51) and the other end (52) of the susceptor (50). One end (51) and the other end (52) of the susceptor (50) in the longitudinal direction of the sheet (40) can be arranged to be misaligned with one end and the other end of the electrically conductive track (60). One end of the electrically conductive track (60) may be spaced apart from one end of the sheet (40) or one end (51) of the susceptor (50) by a predetermined distance (A4). The upper end (53) of the susceptor (50) may be aligned with the upper end of the electrically conductive track (60). The lower end (54) of the susceptor (50) may be aligned with the lower end of the electrically conductive track (60). The distance (A1) by which one end (51) of the susceptor (50) is spaced apart from one end of the electrically conductive track (60) in the longitudinal direction of the sheet (40) may be smaller than the length (L2) of the electrically conductive track (60) defined in the longitudinal direction of the sheet (40).

[0241] The susceptor (50) and the electrically conductive track (60) can be attached to the sheet (40) by thermal bonding. The susceptor (50) is placed on the first surface (41) of the sheet (40) and the electrically conductive track (60) is placed on the second surface (42) of the sheet (40). By heating the sheet (40), the susceptor (50), and the electrically conductive track (60) to a certain temperature or higher, the susceptor (50) and the electrically conductive track (60) can be attached to the sheet (40).

[0242] As described above, according to at least one of the embodiments of the present disclosure, one heater may be configured with a plurality of heating elements corresponding to a plurality of areas included in the stick.

[0243] Additionally, according to at least one embodiment of the present disclosure, the degree of heating for each of a plurality of regions included in the stick can be controlled using one heater.

[0244] Additionally, according to at least one embodiment of the present disclosure, the heating level for each of the plurality of areas included in the stick can be controlled to maintain the taste and amount of vaporization while using the stick.

[0245] In addition, according to at least one embodiment of the present disclosure, it is possible to optimize control of current flowing through a plurality of heating elements based on characteristics of a plurality of heating elements constituting a single heater.

[0246] Additionally, according to at least one embodiment of the present disclosure, the heater assembly is formed by a thin film susceptor disposed on one sheet and an electrically conductive pattern is rolled together with the sheet, thereby reducing the size of the device.

[0247] Additionally, according to at least one embodiment of the present disclosure, the process for producing the heater assembly can be simplified by forming a thin film susceptor and an electrically conductive pattern that are arranged on a single sheet and rolled together with the sheet.

[0248] Additionally, according to at least one embodiment of the present disclosure, the thin film susceptor forms an insertion space and comes into direct contact with the inserted stick, thereby increasing the efficiency of heat transfer to the stick.

[0249] In addition, according to at least one embodiment of the present disclosure, a structure in which a sheet surrounds the outside of an electrically conductive pattern multiple times can be provided, thereby effectively sealing the heater assembly and minimizing heat dissipation to the outside.

[0250] In addition, according to at least one embodiment of the present disclosure, a bracket capable of fixing the upper and lower parts of the heater assembly can be provided, thereby ensuring rigidity of the heater assembly.

[0251] Additionally, according to at least one embodiment of the present disclosure, the susceptor and the electrically conductive pattern are attached to the sheet by thermal bonding, thereby simplifying the bonding structure of the heater assembly.

[0252] Referring to FIGS. 1 to 26, an aerosol generating device (1) according to one aspect of the present disclosure comprises: a body (10) having an insertion space (43) with one side open; and a heater (18) including an electrically conductive track (60), wherein the heater (18) comprises: a first heating unit corresponding to a part of a first region of a stick (S) inserted into the insertion space (43); and a second heating unit corresponding to a second region of the stick (S) and another part of the first region, wherein the first heating unit corresponds to a first node (a) which is one end of the electrically conductive track (60) and a third node (c) which is located between the first node (a) and a second node (b) which is the other end of the electrically conductive track (60), and the second heating unit corresponds to the second node (b) and the third node (c), and the first heating unit and the second heating unit can be connected in series at the third node (c).

[0253] In addition, according to another aspect of the present disclosure, the first region of the stick (S) may be an aerosol base portion (510) where moisturizer vapor is generated, and the second region of the stick (S) may be a medium portion (520) where nicotine vapor is generated.

[0254] Additionally, according to another aspect of the present disclosure, the amount of moisturizer included in the first region of the stick (S) may be greater than the amount of moisturizer included in the second region of the stick (S).

[0255] In addition, according to another aspect of the present disclosure, the power supply circuit (910) is electrically connected to the first node (a) and outputs a predetermined voltage; a switching circuit (920) electrically connecting one of the second node (b) and the third node (c) to the power supply circuit (910); and a control unit (12). The control unit (12) can control the switching circuit (920) so that the third node (c) is electrically connected to the power supply circuit (910) in a first section, and can control the switching circuit (920) so that the second node (b) is electrically connected to the power supply circuit (910) in a second section.

[0256] In addition, according to another aspect of the present disclosure, the first section may be a section for performing preheating on the stick (S), and the second section may be a section for performing heating after preheating on the stick (S) is completed.

[0257] In addition, according to another aspect of the present disclosure, a puff sensor (132) for detecting a puff may be further included, and the first section may be a section in which the number of puffs counted through the puff sensor (132) is less than a predetermined number, and the second section may be a section in which the number of puffs is greater than or equal to the predetermined number.

[0258] Additionally, according to another aspect of the present disclosure, as the size corresponding to a part of the first area of ​​the stick (S) increases, the predetermined number of times may increase.

[0259] In addition, according to another aspect of the present disclosure, as the ratio of the second size corresponding to a part of the first area of ​​the stick (S) to the first size corresponding to a part of the first area of ​​the stick (S) and the other part increases, the predetermined number of times may increase.

[0260] In addition, according to another aspect of the present disclosure, the first section may be a section in which a predetermined condition for temporarily stopping heating of the stick (S) is satisfied, and the second section may be a section in which the predetermined condition is not satisfied.

[0261] In addition, according to another aspect of the present disclosure, a puff sensor (132) for detecting a puff is further included, and the control unit (12) can determine that the predetermined condition is satisfied when the non-detection time that elapses in a state in which the puff is not detected by the puff sensor (132) is a predetermined time or longer, and can determine that the predetermined condition is not satisfied when the non-detection time is less than the predetermined time.

[0262] In addition, according to another aspect of the present disclosure, the electrically conductive track (60) may include a first track (610) corresponding to the aerosol substrate (510); and a second track (620) corresponding to the medium portion (520), and the first heating portion may include a portion of the second track (620) corresponding to the first node (a) and the third node (c), and the second heating portion may include another portion of the first track (610) and the second track (620) corresponding to the second node (b) and the third node (c).

[0263] Additionally, according to another aspect of the present disclosure, the spacing between the patterns forming the first track (610) may be greater than the spacing between the patterns forming the second track (620).

[0264] Additionally, according to another aspect of the present disclosure, the width of the pattern forming the first track (610) may be greater than the width of the pattern forming the second track (620).

[0265] Additionally, according to another aspect of the present disclosure, the resistance value per unit area of ​​the pattern forming the first track (610) may be smaller than the resistance value per unit area of ​​the pattern forming the second track (620).

[0266] Any or all of the embodiments of the present disclosure described herein are not mutually exclusive or distinct. Any or all of the embodiments of the present disclosure described herein may have their respective components or functions combined or used together.

[0267] 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.

[0268] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. A body having an insertion space formed with one side open; and A heater comprising electrically conductive tracks; The above heater, A first heating part corresponding to a part of a first area of ​​a stick inserted into the above insertion space; A second heating element corresponding to a second region of the stick and another part of the first region, The first heating unit corresponds to a first node, which is one end of the electrically conductive track, and a third node, which is located between the first node and a second node, which is the other end of the electrically conductive track. The second heating unit corresponds to the second node and the third node, An aerosol generating device, characterized in that the first heating unit and the second heating unit are connected in series at the third node.

2. In paragraph 1, The first region of the above stick is an aerosol base where moisturizing vapor is generated, An aerosol generating device characterized in that the second region of the stick is a medium portion in which nicotine vapor is generated.

3. In paragraph 2, An aerosol generating device, characterized in that the amount of moisturizer included in the first region of the stick is greater than the amount of moisturizer included in the second region of the stick.

4. In paragraph 1, A power supply circuit electrically connected to the first node and outputting a predetermined voltage; A switching circuit electrically connecting one of the second node and the third node to the power supply circuit; and Including more control units, The above control unit, In the first section, the switching circuit is controlled so that the third node is electrically connected to the power supply circuit, An aerosol generating device characterized in that, in a second section, the switching circuit is controlled so that the second node is electrically connected to the power supply circuit.

5. In paragraph 4, The above first section is a section for performing preheating on the stick, An aerosol generating device characterized in that the second section is a section in which heating is performed after preheating of the stick is completed.

6. In paragraph 4, It further includes a puff sensor that detects the puff, The above first section is a section in which the number of puffs counted through the puff sensor is less than a predetermined number, An aerosol generating device characterized in that the second section is a section in which the number of puffs is greater than or equal to the predetermined number.

7. In paragraph 6, An aerosol generating device characterized in that the above predetermined number of times increases as the size corresponding to a portion of the first area of ​​the stick increases.

8. In paragraph 6, An aerosol generating device characterized in that the above predetermined number of times increases as the ratio of the second size corresponding to a part of the first area of ​​the stick to the first size corresponding to a part of the first area of ​​the stick and the other part increases.

9. In paragraph 4, The above first section is a section in which a predetermined condition for temporarily stopping heating of the stick is satisfied, An aerosol generating device, characterized in that the second section is a section in which the predetermined condition is not satisfied.

10. In paragraph 9, It further includes a puff sensor that detects the puff, The above control unit, If the non-detection time that elapses without the puff being detected by the puff sensor is longer than a predetermined time, it is determined that the predetermined condition is satisfied. An aerosol generating device characterized in that if the above-mentioned non-detection time is less than the above-mentioned predetermined time, it is determined that the above-mentioned predetermined condition is not satisfied.

11. In paragraph 2, The above electrically conductive track is, A first track corresponding to the aerosol carrier; and Including a second track corresponding to the above medium, The first heating unit includes a portion of the second track corresponding to the first node and the third node, An aerosol generating device, characterized in that the second heating unit includes another part of the first track and the second track corresponding to the second node and the third node.

12. In paragraph 11, An aerosol generating device, characterized in that the spacing between the patterns forming the first track is greater than the spacing between the patterns forming the second track.

13. In paragraph 11, An aerosol generating device, characterized in that the width of the pattern forming the first track is greater than the width of the pattern forming the second track.

14. In paragraph 11, An aerosol generating device, characterized in that the resistance value per unit area of ​​the pattern forming the first track is smaller than the resistance value per unit area of ​​the pattern forming the second track.

Images