Aerosol generating device and method of operation thereof

Abstract

According to one embodiment, the aerosol generating device includes a main body and a cartridge that is detachably connected to the main body, the cartridge including a storage tank in which an aerosol generating substance is stored, a heat generating structure that heats the aerosol generating substance, and a wick that supplies the aerosol generating substance stored in the storage tank to the heat generating structure, the main body including a cartridge sensing circuit that senses the temperature of the heat generating structure of the cartridge, and a processor that is not connected to the output terminal of the cartridge sensing circuit and is electrically connected to the cartridge sensing circuit, and the processor can sense the temperature of the heat generating structure through the cartridge sensing circuit and control the power supply to the cartridge based on the sensed temperature of the heat generating structure.

Description

[Technical Field]

[0001] The present invention relates to an aerosol generating device and an operating method thereof that controls power supply by sensing the temperature of a heat generating structure through a cartridge sensing circuit to which no capacitor is connected. [Background technology]

[0002] Recently, there has been an increasing demand for alternative methods to overcome the drawbacks of conventional cigarettes, such as a system that generates aerosol by heating a cigarette or an aerosol-generating substance using an aerosol-generating device, rather than a method that generates aerosol by burning a cigarette.

[0003] The use of electronic cigarettes, which generate aerosol by heating a liquid composition containing an aerosol-generating material, is gradually increasing. The liquid composition in the cartridge is supplied to a wick through a predetermined path, and the aerosol can be generated as the wick is heated by a heater.

[0004] Recently, in relation to cartridges containing a liquid composition, active research has been conducted into methods for detecting whether the liquid composition in the cartridge has run out and how much of the liquid composition remains. In particular, if heating continues when the liquid composition in the cartridge has run out, all of the aerosol-generating material impregnated in the wick may vaporize, causing only the dry wick, which is not an aerosol-generating material, to heat. In such cases, no aerosol is generated due to the vaporization of the aerosol-generating material, and the wick and / or foreign matter may heat up, resulting in an undesirable burnt taste for the user.

[0005] Therefore, the aerosol generating device can determine whether the liquid composition in the cartridge has run out, and if the liquid composition has run out, can interrupt the supply of power to the heater to prevent further heating. Summary of the Invention [Problem to be solved by the invention]

[0006] When the aerosol generating device determines whether the liquid composition in the cartridge is depleted and controls the power supply to the heater of the cartridge, the speed and accuracy of the control may vary depending on the speed at which the heater temperature of the cartridge is sensed. That is, the faster the heater temperature of the cartridge is sensed, the faster the determination of whether the liquid composition is depleted can be made. When it is determined that the liquid composition in the cartridge is depleted, the aerosol generating device can prevent carbonization inside the cartridge by quickly cutting off the power supply to the heater of the cartridge.

[0007] In the case of conventional aerosol generating devices, there is a somewhat long time lag between receiving a command to sense the cartridge temperature and sensing the actual temperature, which reduces the speed at which the cartridge heater temperature is sensed.

[0008] Various embodiments of the present invention provide an aerosol generating device with increased temperature sensing speed by reducing the time it takes for a component that senses the heater temperature in a cartridge to charge to a saturation current.

[0009] The problems to be solved by the present invention are not limited to the above-mentioned problems, and problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the embodiments belong from this specification and the accompanying drawings. [Means for solving the problem]

[0010] In one embodiment, the aerosol generating device includes a main body and a cartridge that is detachably connected to the main body, the cartridge including a storage tank in which an aerosol generating substance is stored, a heat generating structure that heats the aerosol generating substance, and a wick that supplies the aerosol generating substance stored in the storage tank to the heat generating structure, the main body including a cartridge sensing circuit that senses the temperature of the heat generating structure of the cartridge, and a processor that does not have a capacitor connected to the output end of the cartridge sensing circuit and is electrically connected to the cartridge sensing circuit, and the processor can sense the temperature of the heat generating structure through the cartridge sensing circuit and control the power supply to the cartridge based on the sensed temperature of the heat generating structure.

[0011] In one embodiment, a method of operating an aerosol generating device may include a step of sensing the temperature of a heat-generating structure contained in a cartridge through a cartridge sensing circuit to which no capacitor is connected at its output terminal, and a step of controlling power supply to the cartridge based on the sensed temperature of the heat-generating structure. [Effects of the Invention]

[0012] According to various embodiments of the present invention, since a separate capacitor is not connected to the output terminal of the cartridge detection circuit, the charging speed of the cartridge detection circuit is increased, and the increased charging speed can increase the temperature sensing speed for the heater within the cartridge.

[0013] Additionally, increased temperature sensing speed for the heater within the cartridge allows for substantially faster and more accurate acquisition of the heater's status, thereby enabling faster and more accurate temperature control action on the heater.

[0014] However, the effects of the embodiments are not limited to the effects described above, and effects not mentioned will be clearly understood by those having ordinary skill in the art to which the embodiments pertain from this specification and the accompanying drawings. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a view showing an aerosol generating device according to an embodiment of the present invention. [Figure 2] 1 is a view showing an aerosol generating device according to another embodiment of the present invention. [Figure 3] 1 is a front perspective view of an aerosol generating device according to one embodiment of the present invention; FIG. [Figure 4] 1 is a perspective view of the body, cartridge, and cap of an aerosol generating device according to one embodiment of the present invention; [Figure 5] 1 is a cross-sectional view of an aerosol generating device according to one embodiment of the present invention. [Figure 6] FIG. 10 is a front perspective view of an aerosol generating device according to another embodiment of the present invention. [Figure 7] FIG. 10 is a perspective view of the body, cartridge, and cap of an aerosol generating device according to another embodiment of the present invention. [Figure 8] FIG. 10 is an exploded perspective view of a cartridge of an aerosol generating device according to another embodiment of the present invention. [Figure 9] FIG. 10 is a cross-sectional view of a cartridge of an aerosol generating device according to another embodiment of the present invention. [Figure 10] FIG. 10 is a cross-sectional view of an aerosol generating device according to another embodiment of the present invention. [Figure 11] 1 is a cross-sectional view of an aerosol generating device according to one embodiment. [Figure 12A] FIG. 1 is a block diagram of a conventional aerosol generating device. [Figure 12B] FIG. 1 is a block diagram of an aerosol generating device according to one embodiment. [Figure 13] 10 is a flowchart illustrating an embodiment of an aerosol generating device controlling power supply to a cartridge. [Figure 14A] 12B is a graph showing the time it takes for the aerosol generating device of FIG. 12A to reach saturation current. [Figure 14B] 12C is a graph showing the time it takes for the aerosol generating device of FIG. 12B to reach saturation current. [Figure 15]10 is a flowchart illustrating an aerosol generating device interrupting power supply to a cartridge according to one embodiment. [Figure 16] FIG. 1 is a block diagram of an aerosol generating device according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. Regardless of the drawing numbers, identical or similar components will be given the same reference numbers and redundant descriptions thereof will be omitted.

[0017] The suffixes "module" and "section" used in the following description relating to components are given or used interchangeably solely for the convenience of writing the specification, and do not have any meanings or roles that are distinct from each other in themselves.

[0018] Furthermore, when describing the embodiments disclosed herein, if a detailed description of the related known technology is deemed to obscure the gist of the embodiments disclosed herein, the detailed description will be omitted. Furthermore, the attached drawings are intended only to facilitate understanding of the embodiments disclosed herein, and the technical ideas disclosed herein should not be limited by the attached drawings, and should be understood to include all modifications, equivalents, and alternatives within the spirit and technical scope of the present invention.

[0019] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The terms are used merely to distinguish one component from another.

[0020] When a component is referred to as being "coupled" or "connected" to another component, it should be understood that the component is directly coupled or connected to the other component, but that there may be other components in between. On the other hand, when a component is referred to as being "directly coupled" or "directly connected" to another component, it should be understood that there are no other components in between.

[0021] The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0022] 1 and 2 show an aerosol generating device 1 according to an embodiment of the present invention.

[0023] Referring to FIG. 1, the aerosol generator 1 includes at least one of a power source 11, a control unit 12, a sensor 13, a heater 18, and a cartridge 19. At least one of the power source 11, the control unit 12, the sensor 13, and the heater 18 may be disposed inside a main body 10 of the aerosol generator. The main body 10 may provide a space with an opening at the top into which an aerosol-producing product, a stick S, can be inserted. The space with an opening at the top is also referred to as an insertion space. The insertion space is recessed to a predetermined depth toward the inside of the main body 10 so that at least a portion of the stick S can be inserted. The depth of the insertion space corresponds to the length of a region of the stick S containing the aerosol-generating material and / or medium. The bottom end of the stick S is inserted into the main body 10, and the top end of the stick S protrudes outside the main body 10. A user can inhale air through the top end of the stick S exposed to the outside.

[0024] The heater 18 can heat the stick S. The heater 18 can extend long upward around the periphery of the space into which the stick S is inserted. For example, the heater 18 can be tubular with a hollow interior. The heater 18 can be arranged around the periphery of the insertion space. The heater 18 can be arranged so as to surround at least a portion of the insertion space. The heater 18 can heat the insertion space or the stick S inserted into the insertion space. The heater 18 includes an electrical resistance heater and / or an induction heater.

[0025] For example, the heater 18 may be a resistive heater. For example, the heater 18 may include a conductive track, and the heater 18 may be heated by passing a current through the conductive track. The heater 18 may be electrically connected to the power source 11. The heater 18 may be directly heated by receiving a current from the power source 11.

[0026] For example, the aerosol generating device 1 includes an induction coil surrounding the heater 18. The induction coil can cause the heater 18 to generate heat. The heater 18 is a susceptor, and the heater 18 can be heated by a magnetic field generated by AC current flowing through the induction coil. The magnetic field penetrates the heater 18 and generates eddy currents within the heater 18. The current causes the heater 18 to generate heat.

[0027] Meanwhile, a susceptor is included inside the stick S, and the susceptor inside the stick S can be heated by a magnetic field generated by an AC current flowing through an induction coil.

[0028] Cartridge 19 contains an aerosol-forming material that can be in any one of a liquid, solid, gaseous, or gel state. The aerosol-forming material may include a liquid composition. For example, the liquid composition may be a liquid containing a tobacco-containing substance that includes a volatile tobacco flavor component, or a liquid containing a non-tobacco substance.

[0029] The cartridge 19 is either integrally formed with the main body 10 or detachably coupled to the main body 10 .

[0030] For example, referring to FIG. 1, the cartridge 19 may be integrally formed with the main body 10 and communicate with the insertion space through the airflow channel CN.

[0031] 2, a space is formed on one side of the main body 10, and at least a portion of the cartridge 19 is inserted into the space formed on one side of the main body 10 to mount the cartridge 19 on the main body 10. An airflow channel CN ​​is defined by a portion of the cartridge and / or a portion of the main body 10, and the cartridge 19 can communicate with the insertion space through the airflow channel CN.

[0032] The main body 10 may be configured to allow outside air to flow into the main body 10 when the cartridge 19 is inserted. In this case, the outside air flowing into the main body 10 may pass through the cartridge 19 and flow into the user's mouth.

[0033] The cartridge 19 includes a storage section C0 containing an aerosol-generating substance and / or a heater 24 for heating the aerosol-generating substance in the storage section C0. A liquid transfer means impregnated with (containing) the aerosol-generating substance is disposed inside the storage section C0. The liquid transfer means may include a wick such as cotton fiber, ceramic fiber, glass fiber, or porous ceramic. The conductive track of the heater 24 may be formed in a coil-like structure that wraps around the liquid transfer means or in a structure that contacts one side of the liquid transfer means. The heater 24 is also referred to as a cartridge heater 24.

[0034] The cartridge 19 can generate an aerosol. The aerosol is generated by heating the liquid transfer means with the cartridge heater 24. The aerosol is generated by heating the stick S with the heater 18. As the aerosol generated by the cartridge heater 24 and the heater 18 passes through the stick S, tobacco substances are added to the aerosol, and the aerosol with the added tobacco substances is inhaled into the user's mouth through one end of the stick S.

[0035] The aerosol generating device 1 is equipped with only the cartridge heater 24, and the main body 10 is not equipped with a heater 18. In this case, the aerosol generated by the cartridge heater 24 passes through the stick S, and is mixed with tobacco substances before being inhaled into the user's oral cavity.

[0036] The aerosol generating device 1 includes a cap (not shown), which is releasably coupled to the main body 10 so as to cover at least a portion of the cartridge 19 coupled to the main body 10. The stick S is inserted into the main body 10 through the cap.

[0037] The power source 11 can supply power to operate the components of the aerosol generation device. The power source 11 is also referred to as a battery. The power source 11 can supply power to at least one of the control unit 12, the sensor 13, the cartridge heater 24, and the heater 18. If the aerosol generation device 1 includes an induction coil, the power source 11 can supply power to the induction coil.

[0038] The control unit 12 can control the overall operation of the aerosol generation device. The control unit can be mounted on a printed circuit board (PCB). The control unit 12 can control the operation of at least one of the power supply 11, the sensor 13, the heater 18, and the cartridge 19. The control unit 12 can control the operation of a display, a motor, etc. provided in the aerosol generation device. The control unit 12 can check the status of each component of the aerosol generation device and determine whether the aerosol generation device is in an operable state.

[0039] The control unit 12 can analyze the results sensed by the sensor 13 and control subsequent processing. For example, the control unit 12 can control the power supplied to the cartridge heater 24 and / or the heater 18 so as to start or end the operation of the cartridge heater 24 and / or the heater 18 based on the results sensed by the sensor 13. For example, the control unit 12 can control the amount of power and the time for which power is supplied to the cartridge heater 24 and / or the heater 18 so that the cartridge heater 24 and / or the heater 18 are heated to a predetermined temperature or maintained at an appropriate temperature based on the results sensed by the sensor 13.

[0040] The sensor 13 includes at least one of a temperature sensor, a puff sensor, an insertion detection sensor, a color sensor, a cartridge detection sensor, and a cap detection sensor. For example, the sensor 13 can 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 main body 10. For example, the sensor 13 can sense a puff by a user. For example, the sensor 13 can sense whether the stick S is inserted into the insertion space. For example, the sensor 13 can sense whether a cartridge is attached. For example, the sensor 13 can sense whether a cap is attached.

[0041] Figure 3 is a front perspective view of an aerosol generating device according to one embodiment of the present invention, Figure 4 is a combined perspective view of the body, cartridge and cap of an aerosol generating device according to one embodiment of the present invention, and Figure 5 is a cross-sectional view of an aerosol generating device according to one embodiment of the present invention.

[0042] 3, an aerosol generation device A100 according to an embodiment of the present invention may include a main body A3. The aerosol generation device A100 may include a cap A30. The aerosol generation device A100 may include a cartridge A40. The cartridge A40 may be detachably coupled to one side of the main body A3. The cap A30 may be detachably coupled to the main body A3 to cover the cartridge A40. A stick S may be inserted into the main body A3 through the cap A30.

[0043] 4, the main body A3 may include a lower body A1 and an upper body A2. Components of the aerosol generating device A100, such as a battery and a controller, may be installed inside the lower body A1. The upper body A2 may be coupled to the upper side of the lower body A1.

[0044] The upper body A2 may include a column A10 and a mounting portion A20. The column A10 may be elongated in the vertical direction. The column A10 may include an outer wall A11, an inner wall A12, and an upper wall A13.

[0045] The mounting portion A20 may protrude from the lower portion of the inner wall A12 of the column A10. The mounting portion A20 may face the upper side. The cartridge region A24 may be formed between the inner wall A12 of the column A10 and the mounting portion A20. The cartridge region A24 may be located on one side of the inner wall A12 of the column A10 and above the mounting portion A20.

[0046] The column A10 may include an insertion space A142. The insertion space A142 may extend vertically from the interior of the column A10 and may be open upward so that the upper wall A13 is open.

[0047] The main body inlet A141 may be formed on one side of the column A10. The main body inlet A141 may be formed by opening the inner wall A12. The main body inlet A141 may be open to the outside of the column A10. The main body inlet A141 may be connected to the insertion space A142. The main body inlet A141 may be disposed toward the cartridge region A24. The main body inlet A141 may be connected to the cartridge region A24.

[0048] The cartridge A40 can be detachably coupled to the upper body A2 from the cartridge region A24. The cartridge A40 can be coupled to the inner wall A12 of the column A10 and placed on the mounting portion A20 so that its bottom is supported. The cartridge A40 can include a first container A41 and a second container A42. The first container A41 can be disposed above the second container A42. The first container A41 can store liquid.

[0049] The cap A30 covers the upper body A2 and may be detachably coupled to the main body A3. The cap A30 may cover the upper body A2 and the cartridge A40 coupled to the upper body A2. The cap A30 may have a space formed therein into which the upper body A2 and the cartridge A40 are inserted. The space inside the cap A30 may be open at the bottom. The sidewall A31 of the cap A30 may enclose the sides of the space inside the cap A30. The top wall A33 of the cap A30 may cover the top of the space inside the cap A30. The insertion opening A34 may be formed by opening the top wall A33. When the cap A30 is coupled to the main body A3, the insertion opening A34 may be connected to the insertion space A142 above the insertion space A142. The cover A35 may be movably installed on the top wall A33. The cover A35 may slide on the top wall A33. The cover A35 can open and close the insertion opening A34.

[0050] 5, a first chamber AC1 may be formed inside a first container A41. A liquid may be stored in the first chamber AC1. A second chamber AC2 may be formed inside a second container A42.

[0051] The cartridge inlet A441 may be formed by opening the cartridge A40. The cartridge outlet A442 may be formed by opening the cartridge A40. The cartridge flow path A443 may connect the cartridge inlet A441 and the second chamber AC2. The cartridge outlet A442 may be in communication with the second chamber AC2.

[0052] The cartridge outlet A442 may be formed by opening one side of the second container A42. The outlet port A422 may surround the cartridge outlet A442. The outlet port A422 may protrude from one side of the second container A42. When the cartridge A40 is coupled to the upper body A2, the outlet port A422 may be inserted into the body inlet A141, and the cartridge outlet A442 may be connected to the body inlet A141.

[0053] The wick A45 may be disposed in the second chamber AC2. The wick A45 may be connected to the first chamber AC1. The wick A45 may be supplied with liquid from the first chamber AC1. The heater A46 may be heated to heat the wick A45. The heater A46 may be disposed in the second chamber AC2. The heater A46 may wind the wick A45. When the heater A46 heats the wick A45, an aerosol may be generated around the wick A45 in the second chamber AC2.

[0054] The heater terminal A47 may be exposed at the bottom of the cartridge A40. The heater terminal A47 may be formed at the bottom of the second container A42. The heater terminal A47 may be electrically connected to the heater A46. When the cartridge A40 is coupled to the upper body A2, the heater terminal A47 may come into contact with and be electrically connected to the first pin A50. In this case, the heater terminal A47 may be referred to as the second pin A47.

[0055] The first pin A50 may protrude outside the mounting portion A20. The first pin A50 may receive power from a battery installed inside the lower body A1 through the connector A97 and provide it to the heater terminal A47 and the heater A46. The heater A46 may generate heat upon receiving the power.

[0056] Air outside the cartridge A40 may flow into the cartridge A40 through the cartridge inlet A441. The air may sequentially flow through the cartridge inlet A441, the cartridge flow path A443, the second chamber AC2, and the cartridge outlet A442. The air inside the cartridge A40 may be discharged to the outside of the cartridge A40 through the cartridge outlet A442. The air flowing into the cartridge A40 may be discharged to the outside of the cartridge A40 through the cartridge outlet A442, carrying the aerosol generated in the second chamber AC2.

[0057] The first pin A50 is disposed inside the main body A3 but may protrude to the outside of the main body A3. The main body A3 may include a mounting portion A20.

[0058] The mounting portion A20 may include an outer recessed groove A25. The outer recessed groove A25 may be formed by recessing the upper surface A21 of the mounting portion A20 downward. The outer recessed groove A25 may be located below the cartridge region A24. The upper surface A21 of the mounting portion A20 may be referred to as the outer surface of the main body A3. The outer recessed groove A25 may be formed in the outer surface of the main body A3.

[0059] The lower portion of the outer recessed groove A25 may be covered by the bottom portion A251, and the side portion may be covered by the peripheral portion A252. The upper portion of the outer recessed groove A25 may be open. One side of the outer recessed groove A25 may be open and not covered by the peripheral portion A252. If the x direction in the coordinate system is defined as the front, the front of the outer recessed groove A25 may be open. The upper end of the first pin A50 may protrude or be exposed in a convex shape upward from the bottom A251 of the outer recessed groove A25 toward the outer recessed groove A25.

[0060] The bottom of the cartridge A40 may have a shape corresponding to the mounting portion A20 and the outer recessed groove A25. When the cartridge A40 is coupled to the upper body A2, the bottom of the cartridge A40 is placed on the mounting portion A20, and the first pin A50 and the second pin A47 may be electrically connected to each other.

[0061] A plurality of guide portions A253 may be provided. The guide portions A253 may extend longitudinally from the front to the rear. The guide portions A253 may be formed with an inclination so that they gradually become higher from the front to the rear. Each of the plurality of guide portions A253 may be disposed in front of each of the plurality of first pins A50. The height of the rear end of the guide portion A253 adjacent to the first pin A50 is the same as or similar to the height of the first pin A50.

[0062] Thus, when the cartridge A40 is coupled to the upper body A2, the guide portion A253 can guide the arrangement of the cartridge A40 so that the first pin A50 and the second pin A47 come into contact with each other.

[0063] Figure 6 is a front oblique view of an aerosol generating device according to another embodiment of the present invention, Figure 7 is a combined oblique view of the body, cartridge and cap of an aerosol generating device according to another embodiment of the present invention, Figure 8 is an exploded oblique view of the cartridge of an aerosol generating device according to another embodiment of the present invention, Figure 9 is a cross-sectional view of the cartridge of an aerosol generating device according to another embodiment of the present invention, and Figure 10 is a cross-sectional view of an aerosol generating device according to another embodiment of the present invention.

[0064] 6 and 7, in an aerosol generating device according to another embodiment of the present invention, a main body B100 may include an upper main body B120 and a lower main body B110. The upper main body B120 may be located above the lower main body B110. The lower main body B110 may be elongated in the vertical direction. The main body B100 may house a configuration for driving the aerosol generating device therein. The upper main body B120 may provide an insertion space B134 that is open upward. The insertion space B134 may be located inside the upper main body B120. The insertion space B134 may be elongated in the vertical direction. The insertion space B134 may be formed in a pipe B130 located inside the upper main body B120.

[0065] The upper case B200 may have a hollow shape with an open bottom. The upper body B120 may be inserted into the hollow of the upper case B200. The upper case B200 may be detachably coupled to the main body B100. The upper case B200 may surround and cover the upper body B120. A lateral portion B211 of the upper case B200 may surround and cover a side wall B121 of the upper body B120. An upper portion B212 of the upper case B200 may cover the upper portion B180 or the outer cover B180 of the upper body B120. When the upper case B200 is coupled to the main body B100, the upper case B200 may cover both the main body B100 and the cartridge B300. The cartridge B300 may be disposed inside the upper case B200.

[0066] The insertion opening B214 may be formed by opening the upper part B212 of the upper case B200. The insertion opening B214 may correspond to the opening of the insertion space B134. The cap B215 may be movably installed on the upper part B212 of the upper case B200. The slide hole B213 may be formed in the upper part B212 of the upper case B200, extending from the insertion opening B214 to one side. The cap B215 may be movable along the slide hole B213. The cap B215 may open and close the insertion opening B214 and the insertion space B134. The stick S may be inserted into the insertion space B134 through the insertion opening B214. For example, the stick S may be a cigarette.

[0067] The outer wall B121 and the partition B125 may form a lateral portion of the upper body B120. The outer wall B121 and the partition B125 may be connected to each other. The outer wall B121 is covered by the inner surface of the upper case B200. The partition B125 may separate the cartridge coupling space B124a and the insertion space B134.

[0068] The upper body B120 may include a mounting portion B122. The mounting portion B122 may extend to one side from a lower portion of the partition B125. The mounting portion B122 may be formed on an upper side of the lower body B110. The mounting portion B122 may cover a lower portion of the cartridge coupling space B124a. The bottom surface of the cartridge B300 may be placed on and supported by the mounting portion B122.

[0069] The upper body B120 may include an extension B140. The extension B140 may extend to one side from an upper portion of the partition B125. The extension B140 may extend in a direction in which the mounting portion B122 is formed. The extension B140 may cover an upper portion of the cartridge coupling space B124a. The extension B140 may cover an upper end surface of the cartridge B300. The extension B140 may cover a cartridge inlet B301 formed in the cartridge B300. A gap through which air can flow may be formed between the extension B140 and the cartridge inlet B301.

[0070] The cartridge coupling space B124a may be formed on one side of the upper body B120. The cartridge coupling space B124a is defined by the mounting portion B122, the partition wall B125, and the extension portion B140 of the upper body B120. The bottom of the cartridge coupling space B124a is covered by the mounting portion B122. One side of the cartridge coupling space B124a is covered by the partition wall B125 of the upper body B120. The top of the cartridge coupling space B124a is covered by the extension portion B140. The cartridge coupling space B124a may be open to the outside between the mounting portion B122 and the extension portion B140.

[0071] The cartridge B300 may be inserted into the cartridge coupling space B124a and coupled to the main body B100. The cartridge B300 may be detachably coupled to the main body B100. A lateral surface B311 of the cartridge B300 may face the partition wall B125. An upper end surface B312 of the cartridge B300 may be covered by the extension portion B140. A bottom surface B322 of the cartridge B300 may be mounted on the mounting portion B122. The cartridge terminal B128 may be connected to the cartridge B300 to supply power to a heater B342 inside the cartridge B300.

[0072] The coupling hook B125a may be formed on the upper body B120. The pusher B125b may be formed on the upper body B120. The coupling hook B125a and the pusher B125b may be formed in pairs on both sides and positioned opposite each other. The cartridge B300 may include a hook coupling groove B315. The hook coupling groove B315 may be formed in a position corresponding to the coupling hook B125a. When the cartridge B300 is inserted into the cartridge coupling space B124a, the coupling hook B125a may be coupled to the hook coupling groove B315 to couple the cartridge B300 and the body B100. The pusher B125b and the coupling hook B125a may move in conjunction with each other. When the pusher B125b is pressed, the coupling hook B125a moves in a direction to be separated from the hook coupling groove B315, and the cartridge B300 can be separated from the main body B100.

[0073] The connecting channel B133 may be formed in a lower portion of the partition B125. The connecting channel B133 may be connected to the insertion space B134. The connecting channel B133 may be opened to one side of the upper body B120. When the cartridge B300 is coupled to the body B100, the discharge port B323 may be inserted into the connecting channel B133, and the connecting channel B133 and the cartridge discharge port B304 may be connected to each other.

[0074] 8, the cartridge B300 may include a first container B31 and a second container B32. The first container B31 may be coupled to the upper side of the second container B32. A plate B35 may be coupled between the first container B31 and the second container B32 or between the first container B31 and the frame B33.

[0075] The first container B31 may include a first chamber BC1 for storing a liquid therein. The first container B31 surrounds the first chamber BC1, and the bottom of the first chamber BC1 may be open. The opening of the first chamber BC1 is covered by a plate B35.

[0076] 9, the first container B31 may include an inlet passage B302 through which air passes. The first chamber BC1 and the inlet passage B302 may be separated from each other. The inlet passage B302 may extend vertically on one side of the first container B31.

[0077] The first container B31 may include a cartridge inlet B301. The cartridge inlet B301 may be formed by opening an upper portion of the first container B31 and may be connected to the inlet passage B302. The cartridge inlet B301 may be connected to an upper end of the inlet passage B302. A lower end of the inlet passage B302 may be connected to the connection hole B351 and the chamber inlet B303.

[0078] The second container B32 may be coupled to the lower part of the first container B31. The second container B32 may have a space B324 that is open at the top and covered at the bottom. The frame B33 may be accommodated inside the space B324 of the second container B32.

[0079] The second container B32 may include a cartridge outlet B304. The cartridge outlet B304 may be formed in a lateral portion B321 of the second container B32. The cartridge outlet B304 may be formed inside a port protruding from the side of the second container B32 in the thickness direction. The cartridge outlet B304 may be in communication with the space B324. The second container B32 may include an outlet port B323. The outlet port B323 may have the cartridge outlet B304 formed therein. The outlet port B323 may protrude to one side from the lateral portion B321 of the second container B32. The outlet port B323 may surround the cartridge outlet B304. The cartridge outlet B304 may be referred to as an outlet B304.

[0080] The frame B33 may be inserted into a space B324 inside the second container B32 and coupled to the second container B32. Fastening members B326 protruding from the sidewalls of the second container B32 into the space B324 may be fastened to the frame B33 to fix the frame B33.

[0081] The frame B33 may include a second chamber BC2 therein. The frame B33 surrounds the second chamber BC2, and the top of the second chamber BC2 may be open. The top of the second chamber BC2 is covered by a plate B35.

[0082] The frame B33 may include a chamber inlet B303. The chamber inlet B303 may be formed by opening one surface of a sidewall surrounding the second chamber BC2. The chamber inlet B303 may be bent upward and extend from the second chamber BC2 toward the inlet channel B302. One end of the chamber inlet B303 may be connected to the second chamber BC2, and the other end of the chamber inlet B303 may be connected to the inlet channel B302 and the connecting hole B351.

[0083] The frame B33 may include a chamber outlet B332. The chamber outlet B332 may be formed on one lateral portion of the frame B33. The chamber outlet B332 may be connected to the second chamber BC2. The chamber outlet B332 may be formed inside a port protruding from the side of the frame B33 in the thickness direction. The chamber outlet B332 may be connected to the second chamber BC2. The chamber outlet B332 may be formed at a position corresponding to the cartridge outlet B304. The chamber outlet B332 may be formed at a position opposite the chamber inlet B303 with respect to the second chamber BC2. When the frame B33 is coupled to the second container B32, the chamber outlet B332 and the cartridge outlet B304 may be connected to each other.

[0084] The frame B33 may have a core coupling groove B334 formed therein. The core coupling groove B334 may be connected to the second chamber BC2. The core coupling groove B334 may be formed by recessing one side of the second chamber BC2. A pair of core coupling grooves B334 may be formed, and the pair of core coupling grooves B334 may be positioned on opposite sides of the second chamber BC2. An upper portion of the core coupling groove B334 may be open.

[0085] The wick B341 may have a cylindrical shape extending laterally into the second chamber BC2. Both ends of the wick B341 may be inserted into the pair of wick coupling grooves B334, respectively. The center of the wick B341 may be located in the second chamber BC2. The wick B341 may be connected to the first chamber BC2 and may receive liquid from the first chamber BC1. The wick B341 may be secured to the frame B33 and plate B35 via the wick coupling grooves B334.

[0086] The heater B342 may be wound around the center of the wick B341. The heater B342 may be heated to heat the wick B341. For example, the heater B342 may be a resistive heater. The heater B342 may be disposed in the second chamber BC2. An end of the heater B342 may penetrate the bottom of the frame B33 and be electrically connected to an electrode disposed at the bottom of the second container B32.

[0087] The plate B35 may be coupled between the first container B31 and the second container B32 or between the first container B31 and the frame B33. The plate B35 of the frame B33 may cover and seal the open portion of the first chamber BC1. The plate B35 may cover the top of the frame B33. The plate B35 may cover and seal the open portion of the second chamber BC2.

[0088] The plate B35 may have a connection hole B351 on one side thereof. The connection hole B351 may be located between the inlet channel B302 and the chamber inlet B303. The connection hole B351 may connect the inlet channel B302 and the chamber inlet B303.

[0089] The plate B35 may have liquid inflow holes B354. The liquid inflow holes B354 may be formed in pairs at positions corresponding to the core coupling grooves B334. The pair of liquid inflow holes B354 may be located above both ends of the core B341. The liquid inflow holes B354 may connect the first chamber BC1 and the core coupling grooves B334. The core B341 may be connected to the first chamber BC1 through the liquid inflow holes B354.

[0090] The hook groove B353 may be formed adjacent to the chamber outlet B332 and above the chamber outlet B332. The hook B335 may protrude downward from one side of the plate B35. The hook B353 may be inserted into the hook groove B353 formed in the upper part of the frame B33 and fastened to the frame B33. When the plate B35 is fastened to the frame B33, the first container B31 coupled to the second container B32 can push the end of the plate B35 toward the frame B33.

[0091] A user can inhale air by holding the stick S inserted into the insertion space B134 in their mouth. When the upper case B200 is coupled to the main body B100, air can flow into the cartridge inlet B301 through an opening B201 formed in the upper case B200. The air can flow into the cartridge B300 through the cartridge inlet B301 and be discharged to the outside of the cartridge B300 through the cartridge outlet B304. The air that flows into the cartridge B300 can sequentially pass through the inlet flow path B302, the connecting hole B351, the chamber inlet B303, the second chamber BC2, the chamber outlet B332, and the cartridge outlet B304 before being discharged to the outside.

[0092] When the heater B342 heats the wick B341, an aerosol may be formed from the wick B341 in the second chamber BC2. Air passing through the cartridge B300 may be discharged from the second chamber BC2 to the cartridge outlet B304 together with the aerosol. The air discharged through the cartridge outlet B304 may be supplied to the insertion space B134 and the stick S inserted into the insertion space B134 through the connecting flow path B133.

[0093] 10, the upper body B120 may include an outer wall B121 and a partition B125. The outer wall B121 and the partition B125 may be connected to each other. The partition B125 may be formed to extend vertically between the pipe B130 and the cartridge connecting space B124a.

[0094] The extension B140 may be formed by extending from the top of the upper body B120 to one side. The upper end surface B312 of the cartridge B300 is covered by the extension B140. The extension B140 may cover the cartridge inlet B301 and its surroundings. Gaps may be formed between the extension B140 and the cartridge inlet B301 and between the lower part of the extension B140 and the upper end surface B312 of the cartridge B300. The gaps may provide communication between the outside and the cartridge inlet B301.

[0095] The pipe B130 may be formed to be long in the vertical direction. The pipe B130 may be formed to be hollow. The insertion space B134 may be formed inside the pipe B130. The insertion space B134 may be open to the upper side. The insertion space B134 may be extended vertically. The connection channel B133 may be formed inside the pipe B130. The connection channel B133 may be formed below the insertion space B134. One end of the connection channel B133 may be connected to the outside of the pipe B130, and the other end may be connected to the insertion space B134. The connection channel B133 may be bent to one side from the lower part of the insertion space B134.

[0096] The first sensor B161 may be installed inside the extension portion B140. The first sensor B161 may face the upper end surface B312 of the cartridge B300 or the cartridge inlet B301. The first sensor B161 may be installed adjacent to the cartridge inlet B301. The first sensor B161 may be located above the cartridge inlet B301. The first sensor B161 may overlap with the cartridge inlet B301 in the up-down direction.

[0097] The first sensor B161 may sense the flow of air in the surrounding area. The first sensor B161 may also be an air flow sensor or a pressure sensor. The first sensor B161 may sense the flow of air through changes in the surrounding air pressure. The extension B140 may have a first sensing hole B144 for sensing the flow of air at a position adjacent to the cartridge inlet B301. The first sensor B161 may be mounted on a substrate disposed inside the extension B140 and electrically connected to a controller (not shown). The controller may control the operation of various components connected to the first sensor B161 based on the detection of the flow of air by the first sensor B161.

[0098] The first sealing portion B151 may be disposed between the first partition wall portion B1251 and the inner plate B171. The first sealing portion B151 may be tightly attached to cover an upper end of the first partition wall portion B1251. The first sealing portion B151 may be tightly attached to a lower end of the inner plate B171.

[0099] The sensor receiving portion B156 of the second sealing portion may seal the periphery of the first sensing hole B144. The sensor receiving portion B156 may be tightly attached to the extension plate around the periphery of the first sensing hole B144. The second sensing hole formed in the sensor receiving portion B156 may be in communication with the first sensing hole B144. The sensor receiving portion B156 may be tightly attached to the first sensor B161 while enclosing it.

[0100] This makes it possible to prevent damage to the substrate or sensor due to foreign matter or aerosols discharged around the opening of the pipe B130 or foreign matter passing through the first sensing hole B144.

[0101] FIG. 11 is a cross-sectional view of an aerosol generating device according to one embodiment.

[0102] 11, an aerosol generating device 1100 may include a cartridge 1120 and a main body 1110 detachably coupled to the cartridge 1120. However, the hardware components inside the aerosol generating device 1100 are not limited to those shown in Fig. 11. Those skilled in the art will understand that, depending on the design of the aerosol generating device 1100, some of the hardware components shown in Fig. 11 may be omitted or new components may be added.

[0103] Hereinafter, the operation of each component included in the aerosol generating device 1100 will be described without limiting the space in which the component is located.

[0104] In one embodiment, cartridge 1120 may include a housing 1122 , a reservoir 1124 , a heat generating structure 1126 , and a wick 1128 .

[0105] In one embodiment, the housing 1122 forms the overall exterior of the cartridge 1120, and the interior of the housing 1122 may form an interior space (or "mounting space") in which the components of the cartridge 1120 are disposed.

[0106] In one embodiment, storage tank 1124 is disposed within housing 1122, and an aerosol-generating substance may be stored within storage tank 1124. The aerosol-generating substance stored in storage tank 1124 may move toward wick 1128 due to gravity.

[0107] In this case, the aerosol-forming material may include a tobacco-containing material containing volatile tobacco flavor components, or may include a liquid composition containing a non-tobacco material.

[0108] According to one embodiment, the liquid composition may contain any one or a mixture of water, solvent, ethanol, plant extract, fragrance, flavoring, and vitamin mixture. The fragrance may include, but is not limited to, menthol, peppermint, spearmint oil, and various fruit fragrance ingredients. The flavoring may include ingredients that can provide the user with a variety of flavors or tastes. The vitamin mixture may include, but is not limited to, a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E. The liquid composition may also include an aerosol-forming agent such as glycerin and propylene glycol.

[0109] For example, the liquid composition may include a glycerin and propylene glycol solution in any weight ratio to which a nicotine salt has been added. The liquid composition may include two or more nicotine salts. The nicotine salt may be formed by adding a suitable acid, including an organic acid or an inorganic acid, to nicotine. The nicotine may be naturally occurring or synthetic nicotine and may have any suitable weight concentration relative to the total solution weight of the liquid composition.

[0110] The acid for forming the nicotine salt may be appropriately selected taking into consideration the rate of nicotine absorption in the blood, the operating temperature of the aerosol generating device 1100, the flavor or taste, solubility, etc. For example, the acid for forming the nicotine salt may be, but is not limited to, a single acid selected from the group consisting of benzoic acid, lactic acid, salicylic acid, lauric acid, sorbic acid, levulinic acid, pyruvic acid, formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, caprylic acid, capric acid, citric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, phenylacetic acid, tartaric acid, succinic acid, fumaric acid, gluconic acid, saccharinic acid, malonic acid, or malic acid, or a mixture of two or more acids selected from the group.

[0111] In one embodiment, wick 1128 can absorb the aerosol-generating substance supplied from storage tank 1124. For example, wick 1128 can be a cotton wick that can absorb the aerosol-generating substance, but the type of wick is not limited thereto. As another example, wick 1128 can be a ceramic wick.

[0112] In one embodiment, the heating structure 1126 can generate an aerosol by heating the aerosol-generating substance absorbed in the wick 1128. For example, but not limited to, the heating structure 1126 can be formed in a coil shape and disposed so as to surround at least a region of the wick 1128. As another example, the heating structure 1126 can be formed in a plate shape and disposed so as to be attached to at least one surface of the wick 1128.

[0113] In one embodiment, the body 1110 may include a body housing 1115 , a processor 1130 , a battery 1140 , and a cartridge sensing circuit 1150 .

[0114] In one embodiment, the main body housing 1115 forms the overall appearance of the main body 1110, and the main body housing 1115 may form an interior space in which components of the main body 1110 are disposed.

[0115] In one embodiment, the battery 1140 can provide power used to operate the aerosol generating device 1100. For example, based on the state (e.g., overheated state, preheated state, etc.) of the cartridge 1120 coupled to the main body 1110, the battery 1140 can provide power to the heat generating structure 1126 disposed within the cartridge 1120. As another example, the battery 1140 can provide the power required to operate the processor 1130.

[0116] In this case, the battery 1140 may be a rechargeable battery or a disposable battery, for example, a lithium polymer (LiPoly) battery, but the type of the battery 1140 is not limited thereto.

[0117] In one embodiment, the processor 1130 can control the supply of power from the battery 1140 to the heat generating structure 1126 based on the state of the cartridge 1120 .

[0118] For example, if the aerosol-generating substance in the reservoir 1124 of the cartridge 1120 becomes depleted, the processor 1130 can prevent the heating structure 1126 from overheating by interrupting the supply of power to the heating structure 1126.

[0119] In one embodiment, the cartridge sensing circuit 1150 can sense an electrical characteristic of the cartridge 1120. For example, the electrical characteristic can include, but is not limited to, the resistance, current, voltage, and variations thereof of the heating structure 1126 in the cartridge 1120.

[0120] The processor 1130 can determine the status of the cartridge 1120 by sensing an electrical characteristic of the cartridge 1120 through the cartridge sensing circuit 1150. For example, if the resistance value of the heating structure 1126 sensed through the cartridge sensing circuit 1150 exceeds a threshold value, the processor 1130 can determine that the aerosol generating material in the cartridge 1120 is depleted. As another example, if the resistance value of the heating structure 1126 sensed through the cartridge sensing circuit 1150 is equal to or less than the threshold value, the processor 1130 can determine that the aerosol generating material in the cartridge 1120 is sufficient.

[0121] FIG. 12A is a block diagram of a conventional aerosol generating device.

[0122] 12A, a conventional aerosol generating device may include a cartridge 1120 and a main body 1210 detachably coupled to the cartridge 1120. In this case, the cartridge 1120 may include a heat-generating structure 1226, and the main body 1210 may include a processor 1230, a battery 1240, and a cartridge sensing circuit 1250. In addition, the cartridge sensing circuit 1250 is electrically connected to the heat-generating structure 1226 of the cartridge 1120, thereby being able to sense the electrical characteristics of the heat-generating structure 1226.

[0123] The cartridge sensing circuit 1250 included in the main body 1210 of a conventional aerosol generating device may include a capacitor 1200 at its output end. By including the capacitor 1200 having a predetermined capacitance (e.g., 100 nF) at its output end, ripple and noise of the input / output power supply present in the aerosol generating device may be removed.

[0124] For example, when alternating current (AC) power is rectified and converted into direct current (DC) power, some AC signal remains, which can be called ripple voltage. In general circuit design, to prevent the ripple voltage from causing unstable power supply or noise, a capacitor 1200 having an appropriate capacitance is generally grounded in parallel to the output terminal.

[0125] FIG. 12B is a block diagram of an aerosol generating device according to one embodiment.

[0126] 12B, the aerosol generating device 1100 may include a cartridge 1120 and a main body 1110 detachably coupled to the cartridge 1120. In this case, the cartridge 1120 may include a heat-generating structure 1126, and the main body 1110 may include a processor 1130, a battery 1140, and a cartridge sensing circuit 1150. In addition, the cartridge sensing circuit 1150 is electrically connected to the heat-generating structure 1126 of the cartridge 1120, thereby being able to sense the electrical characteristics of the heat-generating structure 1126.

[0127] In one embodiment, the aerosol generating device 1100 may not include a capacitor (e.g., capacitor 1200 in FIG. 12A) included in a conventional aerosol generating device. For example, the aerosol generating device 1100 may not include capacitor 1200 grounded at the output end of the cartridge sensing circuit (e.g., cartridge sensing circuit 1250 in FIG. 12A) for stabilization of the input / output power supply and noise removal.

[0128] When a capacitor 1200 is connected in parallel to the output terminal of the cartridge sensing circuit 1250, as in conventional aerosol generating devices, unstable power supply and noise generation due to ripple voltage are prevented, but the connected capacitor 1200 reduces the charging and discharging speed of the cartridge sensing circuit 1250.

[0129] In one embodiment, the cartridge sensing circuit 1150 can sense an electrical characteristic through electrical connection with the heat generating structure 1126. In this case, the electrical characteristic can include, but is not limited to, the resistance, current, voltage, and the amount of change thereof of the heat generating structure 1126 in the cartridge 1120. That is, the processor 1130 can sense the temperature of the heat generating structure 1126 based on the electrical characteristic sensed through the cartridge sensing circuit 1150.

[0130] In this case, in order to perform fast and accurate control of cartridge 1120, processor 1130 must quickly and without delay sense the temperature of heat-generating structure 1126. For example, when the aerosol-generating substance in cartridge 1120 is depleted and the temperature of heat-generating structure 1126 is equal to or higher than the threshold temperature, processor 1130 must quickly sense that the temperature of heat-generating structure 1126 is equal to or higher than the threshold temperature and interrupt the supply of power to heat-generating structure 1126.

[0131] If the interruption of power supply to the heating structure 1126 is delayed even though the temperature of the heating structure 1126 is above the threshold temperature, the dry wick (e.g., wick 1128 in FIG. 11) may continue to heat, causing the heating structure 1126 to heat and / or carbonize unintended materials (e.g., foreign objects, wicks, etc.), thereby providing the user with an undesirable smoking sensation.

[0132] However, if the capacitor 1200 is included at the output end of the cartridge sensing circuit 1250, as in conventional aerosol generating devices, the capacitor 1200 can gradually charge the cartridge sensing circuit 1250 while eliminating ripples and noise through a slow voltage change. As a result, when the temperature of the heat generating structure (e.g., the heat generating structure 1226 in FIG. 12A) is equal to or higher than the threshold temperature, the processor (e.g., the processor 1230 in FIG. 12A) cannot immediately detect that the temperature of the heat generating structure 1226 is equal to or higher than the threshold temperature.

[0133] Therefore, in the aerosol generating device 1100 of the present invention, since a separate capacitor 1200 is not connected to the output terminal of the cartridge sensing circuit 1150, the charging speed of the cartridge sensing circuit 1150 is increased compared to a cartridge sensing circuit 1150 to which the capacitor 1200 is connected, and the increased charging speed of the cartridge sensing circuit 1150 also increases the temperature sensing speed of the cartridge sensing circuit 1150 for the heat-generating structure 1126. Through the cartridge sensing circuit 1150 with an increased temperature sensing speed, the processor 1130 can substantially quickly and accurately obtain the state of the heat-generating structure 1126, thereby enabling more rapid and accurate temperature control operations.

[0134] 13 is a flowchart illustrating how an aerosol generating device according to an embodiment controls power supply to a cartridge. In the description of FIG. 13, descriptions that correspond to, are the same as, or are similar to the above will be omitted.

[0135] 13, a processor (e.g., processor 1130 of FIG. 11) can sense the temperature of a heat-generating structure (e.g., heat-generating structure 1126 of FIG. 11) through a cartridge sensing circuit (e.g., cartridge sensing circuit 1150 of FIG. 11) in operation 1301. Specifically, cartridge sensing circuit 1150 is electrically connected to heat-generating structure 1126 to acquire electrical characteristics of heat-generating structure 1126 and can sense the temperature of heat-generating structure 1126 based on the acquired electrical characteristics.

[0136] In one embodiment, the cartridge sensing circuit 1150 may include a temperature sensor (not shown) electrically connected to the heat generating structure 1126. In this case, the temperature sensor (not shown) may be, but is not limited to, a resistor having a fixed resistance value.

[0137] For example, if the cartridge sensing circuit 1150 includes a temperature sensor in the form of a resistor, the temperature sensor can output a voltage corresponding to the resistance value of the heat-generating structure 1126. The processor 1130 can calculate the resistance value of the heat-generating structure 1126 based on the voltage output from the temperature sensor, and obtain the temperature of the heat-generating structure 1126 based on the calculated resistance value.

[0138] Furthermore, when the temperature sensor in the cartridge sensing circuit 1150 is a resistive type, the temperature sensor may have a resistance value sufficient to sense the temperature of the heat generating structure 1126. For example, the temperature sensor may have a resistance value of approximately 0.05 Ω or less, and preferably a resistance value of approximately 0.02 Ω or less.

[0139] In one embodiment, the main body (e.g., main body 1110 in FIG. 11) further includes a puff sensor (not shown) that senses a user's puff, and the processor 1130 can also sense the temperature of the heat-generating structure 1126 through the cartridge sensing circuit 1150 when a user's puff is sensed through the puff sensor.

[0140] For example, the processor 1130 may repeatedly sense the temperature of the heat generating structure 1126 through the cartridge sensing circuitry 1150 each time a user puff is sensed through the puff sensor.

[0141] If heating of cartridge 1120 (e.g., cartridge 1120 of FIG. 11) continues even after the aerosol-generating material in the cartridge has been depleted, the heating structure 1126 may overheat, potentially causing device failure, and the user's smoking satisfaction may be reduced due to heating and / or carbonization of unintended materials (e.g., foreign matter, wick, etc.). Therefore, the processor 1130 of the present invention repeatedly detects the depletion state of cartridge 1120 by sensing the temperature of the heating structure 1126 each time a user puff is detected, thereby eliminating the problems of possible device failure and reduced user smoking satisfaction.

[0142] According to one embodiment, the processor 1130 can control the power supply to the cartridge 1120 based on the temperature of the heat-generating structure 1126 sensed in operation 1303. For example, the processor 1130 can determine the state of the cartridge 1120 based on the temperature of the heat-generating structure 1126, and determine the power supply based on the determined state of the cartridge 1120.

[0143] In this case, the state of cartridge 1120 refers to the state of cartridge 1120 depending on the remaining amount of aerosol-generating material contained in cartridge 1120. For example, if the remaining amount of aerosol-generating material is sufficient, the temperature of heat-generating structure 1126 falls within the normal heating temperature range, and processor 1130 may determine the state of cartridge 1120 as a "normal state." As another example, if the remaining amount of aerosol-generating material is insufficient (i.e., depleted), the temperature of heat-generating structure 1126 exceeds the normal heating temperature range, and processor 1130 may determine the state of cartridge 1120 as a "liquid-depleted state."

[0144] FIG. 14A is a graph showing the time it takes for the aerosol generating device of FIG. 12A to reach saturation current.

[0145] 14A , a conventional aerosol generating device can sense a user's puff at a first time point 1400. For example, the conventional aerosol generating device can include a puff sensor. Sensing a user's puff at the first time point 1400 can initiate charging of a cartridge sensing circuit (e.g., cartridge sensing circuit 1250 in FIG. 12A ) by receiving power from a battery (e.g., battery 1240 in FIG. 12A ).

[0146] In this case, the cartridge sensing circuit 1250 can sense the temperature of the heat-generating structure (e.g., the heat-generating structure 1226 in FIG. 12A) after being charged to a saturation current 1430. In this case, the saturation current 1430 refers to the final current value when the increasing current value no longer increases. The cartridge sensing circuit 1250 receives power from the battery 1240, and as the current value of the cartridge sensing circuit 1250 increases, it can reach the saturation current 1430 at the second time point 1410. As a result, the cartridge sensing circuit 1250 can start sensing the temperature of the heat-generating structure 1226 at the second time point 1410 when it reaches the saturation current 1430.

[0147] In conventional aerosol generating devices, the time difference 1420 between the first time point 1400 and the second time point 1410 is substantially large, i.e., it takes approximately 500 μs or more from the time the cartridge sensing circuit 1250 begins charging due to a user puff (i.e., after the first time point 1400) until it begins sensing the temperature of the heat generating structure 1226 (i.e., until the second time point 1400).

[0148] In a conventional aerosol generating device, if the time difference 1420 between the first time point 1400 and the second time point 1410 is approximately 500 μs or more and the cartridge sensing circuit 1250 starts temperature sensing at the second time point 1410, the speed at which a processor (e.g., processor 1230 in FIG. 12A ) controls the temperature may be substantially reduced. As a result, even if the temperature of the heat generating structure 1226 exceeds the threshold temperature, the processor 1230 may delay interrupting the power supply to the heat generating structure 1226, thereby increasing the possibility of failure of the aerosol generating device.

[0149] In a conventional aerosol generating device, if the time difference 1420 between the first time point 1400 and the second time point 1410 is approximately 500 μs or more and the cartridge sensing circuit 1250 starts temperature sensing midway between the first time point 1400 and the second time point 1410, the processor 1230 may sense the temperature of the heat generating structure 1226 as lower than the actual temperature. As a result, the processor 1230 controls the temperature of the heat generating structure 1226 to correspond to the set temperature profile, which may result in the actual temperature of the heat generating structure 1226 being higher than the set temperature, thereby providing the user with a burnt taste and inhibiting the satisfaction of smoking.

[0150] FIG. 14B is a graph showing the time it takes for the aerosol generating device 1100 of FIG. 12B to reach saturation current.

[0151] 14B, an aerosol generating device according to one embodiment (e.g., the aerosol generating device 1100 of FIG. 11) can detect a user's puff at a first time point 1440. For example, the aerosol generating device 1100 can include a puff sensor. When the user's puff is detected at the first time point 1440, a cartridge sensing circuit (e.g., the cartridge sensing circuit 1150 of FIG. 12B) can receive power from a battery (e.g., the battery 1140 of FIG. 12B) and begin charging.

[0152] In this case, the cartridge sensing circuit 1150 can sense the temperature of the heat-generating structure (e.g., the heat-generating structure 1126 in FIG. 12B) after being charged to a saturation current 1470. In this case, the saturation current 1470 refers to the final current value when the increasing current value no longer increases. The cartridge sensing circuit 1150 receives power from the battery 1140, and the current value increases, reaching the saturation current 1470 at the second time point 1450. As a result, the cartridge sensing circuit 1150 can start sensing the temperature of the heat-generating structure 1126 at the second time point 1450 when the saturation current 1470 is reached.

[0153] In the aerosol generating device 1100, the time difference 1460 between the first time point 1440 and the second time point 1450 is substantially small, i.e., it takes only about 1 μs to 200 μs for the cartridge sensing circuit 1150 to start sensing the temperature of the heat generating structure 1126 (i.e., until the second time point 1450) after it starts charging due to the user's puff (i.e., after the first time point 1440).

[0154] That is, in the aerosol generating device 1100, the cartridge sensing circuit 1150 can start sensing the temperature of the heat generating structure 1126 within a short time after the user puffs, compared to a conventional aerosol generating device, so the processor (e.g., processor 1130 in FIG. 12B ) can substantially increase the speed at which it controls the temperature. As a result, even if the temperature of the heat generating structure 1126 exceeds the threshold temperature, the processor 1130 immediately cuts off the power supply to the heat generating structure 1126, thereby reducing the possibility of failure of the aerosol generating device 1100.

[0155] Furthermore, the aerosol generating device 1100 can sense the temperature of the heat generating structure 1126 to be substantially the same as the actual temperature (i.e., sense without substantial error) compared to conventional aerosol generating devices, allowing the processor 1130 to control the temperature of the heat generating structure 1126 to correspond to a set temperature profile, thereby providing the user with an optimal tobacco taste.

[0156] 15 is a flowchart illustrating an embodiment of an aerosol generating device that interrupts power supply to a cartridge. The flowchart in FIG. 15 relates to operations subsequent to operation 1301 in FIG. 13, and descriptions that correspond to, are the same as, or are similar to the above-described operations will be omitted.

[0157] 15, a processor (e.g., processor 1130 of FIG. 11) may compare the sensed temperature of a heat-generating structure (e.g., heat-generating structure 1126 of FIG. 11) with a threshold temperature in operation 1501. For example, the threshold temperature may be a preset temperature within a range of about 210°C to about 260°C, but is not limited thereto.

[0158] In the present invention, the "threshold temperature" refers to the minimum temperature of the heat generating structure 1126 when the aerosol generating substance inside the cartridge (e.g., cartridge 1120 in FIG. 11) is depleted. In other words, when the temperature of the heat generating structure 1126 exceeds the threshold temperature, the processor 1130 can determine that the aerosol generating substance inside the cartridge 1120 is depleted.

[0159] For example, if the current temperature of the heat generating structure 1126 sensed through a cartridge sensing circuit (e.g., cartridge sensing circuit 1150 of Figure 11) is 250°C and the preset threshold temperature is 220°C, the processor 1130 can determine that the aerosol generating material inside the cartridge 1120 is depleted.

[0160] In another embodiment, the processor 1130 may acquire a temperature change amount due to the sensed temperature of the heat generating structure 1126 and compare it with a critical change amount. For example, if the temperature change of the heat generating structure 1126 sensed through the cartridge sensing circuit 1150 is +40°C and the preset critical change amount is +30°C, the processor 1130 may determine that the aerosol-generating material inside the cartridge 1120 is depleted.

[0161] According to one embodiment, processor 1130 may interrupt power to cartridge 1120 based on the temperature of heat-generating structure 1126 exceeding a preset threshold temperature in operation 1503 .

[0162] For example, if the aerosol-generating substance in cartridge 1120 is depleted but heating by heating structure 1126 continues, heating structure 1126 can heat a dry wick (e.g., wick 1128 in FIG. 11 ). Dry wick 1128 refers to a wick in which any aerosol-generating substance impregnated within wick 1128 has been vaporized, leaving wick 1128 substantially free of aerosol-generating substance.

[0163] If the dry wick 1128 continues to heat, the heating structure 1126 may overheat and heat unintended materials (e.g., foreign objects, the wick, etc.), providing the user with an undesirable smoking sensation.

[0164] In other embodiments, the processor 1130 may interrupt power to the cartridge 1120 based on the temperature change of the heat-generating structure 1126 exceeding a critical change.

[0165] FIG. 16 is a block diagram of an aerosol generating device 1 according to one embodiment of the present invention.

[0166] The aerosol generation device 1 includes a power supply 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 generation device 1 is not limited to that shown in Fig. 16. That is, it is understandable to a person skilled in the art of the present embodiment that, depending on the design of the aerosol generation device 1, some of the components shown in Fig. 16 may be omitted or new components may be added.

[0167] The sensor 13 can sense the state of the aerosol generation device 1 or the state around the aerosol generation device 1 and transmit the sensed information to the control unit 12. Based on the sensed information, the control unit 12 can control the aerosol generation device 1 to perform various functions such as controlling the operation of the cartridge heater 24 and / or the heater 18, restricting smoking, determining whether the stick S and / or the cartridge 19 is inserted, and displaying notifications.

[0168] The sensor 13 includes at least one of a temperature sensor 131 , a puff sensor 132 , an insertion detection sensor 133 , a reuse detection sensor 134 , a cartridge detection sensor 135 , a cap detection sensor 136 , and a movement detection sensor 137 .

[0169] The temperature sensor 131 can sense the temperature to which the cartridge heater 24 and / or the heater 18 is heated. The aerosol generating device 1 may include a separate temperature sensor that senses the temperature of the cartridge heater 24 and / or the heater 18, or the cartridge heater 24 and / or the heater 18 itself may function as a temperature sensor.

[0170] The temperature sensor 131 can output a signal corresponding to the temperature of the cartridge heater 24 and / or heater 18. For example, the temperature sensor 131 includes a resistive element whose resistance value changes in response to a change in temperature of the cartridge heater 24 and / or heater 18. The temperature sensor 131 is embodied by a thermistor, which is an element that utilizes the property of changing resistance depending on temperature. In this case, the temperature sensor 131 can output a signal corresponding to the resistance value of the resistive element as a signal corresponding to the temperature of the cartridge heater 24 and / or heater 18. For example, the temperature sensor 131 is configured with a sensor that detects the resistance value of the cartridge heater 24 and / or heater 18. In this case, the temperature sensor 131 can output a signal corresponding to the resistance value of the cartridge heater 24 and / or heater 18 as a signal corresponding to the temperature of the cartridge heater 24 and / or heater 18.

[0171] Temperature sensor 131 may be disposed around power supply 11 to monitor the temperature of power supply 11. Temperature sensor 131 may be disposed adjacent to power supply 11. For example, temperature sensor 131 may be attached to one side of a battery that is power supply 11. For example, temperature sensor 131 may be mounted on one side of a printed circuit board.

[0172] The temperature sensor 131 is disposed inside the main body 10 and is capable of sensing the internal temperature of the main body 10 .

[0173] The puff sensor 132 can detect a 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 also be a pressure sensor. The puff sensor 132 can output a signal corresponding to the internal pressure of the aerosol generation device 1. Here, the internal pressure of the aerosol generation device 1 corresponds to the pressure of the airflow path through which the gas flows. The puff sensor 132 can be arranged in the aerosol generation device 1 corresponding to the airflow path through which the gas flows.

[0174] The insertion detection sensor 133 can detect the insertion and / or removal of the stick S. The insertion detection sensor 133 can detect a signal change caused by the insertion and / or removal of the stick S. The insertion detection sensor 133 can be installed around the insertion space. The insertion detection sensor 133 can detect the insertion and / or removal of the stick S based on a change in the dielectric constant inside the insertion space. For example, the insertion detection sensor 133 can be an inductive sensor and / or a capacitance sensor.

[0175] The inductive sensor includes at least one coil. The coil of the inductive sensor is disposed adjacent to the insertion space. For example, when a magnetic field changes around a coil through which a current flows, the characteristics of the current flowing through the coil may change according to Faraday's law. Here, the characteristics of the current flowing through the coil include the frequency, current value, voltage value, inductance value, impedance value, etc. of the alternating current.

[0176] An inductive sensor can output a signal corresponding to a characteristic of the current flowing through a coil, for example, the inductance value of the coil.

[0177] The capacitance sensor includes a conductor. The conductor of the capacitance sensor is disposed adjacent to the insertion space. The capacitance sensor can output a signal corresponding to the surrounding electromagnetic characteristics, for example, the capacitance around the conductor. For example, when a stick S including a metal wrapper is inserted into the insertion space, the wrapper of the stick S may change the electromagnetic characteristics around the conductor.

[0178] The reuse detection sensor 134 can detect whether the stick S has been reused. The reuse detection sensor 134 is also a color sensor. The color sensor can detect the color of the stick S. The color sensor can detect the color of a part of the wrapper surrounding the outside of the stick S. The color sensor can detect a value related to an optical characteristic corresponding to the color of an object based on light reflected from the object. For example, the optical characteristic can be the wavelength of light. The color sensor may be implemented as one component together with the proximity sensor, or as a separate component separate from the proximity sensor.

[0179] At least a portion of the bells constituting the stick S may change color due to the aerosol. The reuse detection sensor 134 may be disposed corresponding to a position where at least a portion of the bells, the color of which changes due to the aerosol, is disposed when the stick S is inserted into the insertion space. For example, before the stick S is used by a user, the color of at least a portion of the bells is a first color. In this case, while the aerosol generated by the aerosol generation device 1 passes through the stick S, at least a portion of the bells may be wetted by the aerosol, thereby changing the color of at least a portion of the bells to a second color. Meanwhile, after the color of at least a portion of the bells is changed from the first color to the second color, the color may be maintained at the second color.

[0180] The cartridge detection sensor 135 can detect the installation and / or removal of the cartridge 19. The cartridge detection sensor 135 can be implemented by an inductance-based sensor, a capacitance-type sensor, a resistance sensor, a hall sensor (hall IC) using the hall effect, or the like.

[0181] The cap detection sensor 136 can detect the attachment and / or removal of the cap. When the cap is separated from the body 10, parts of the cartridge 19 and the body 10 that were covered by the cap may be exposed to the outside. The cap detection sensor 136 may be implemented by a contact sensor, a hall sensor (hall IC), an optical sensor, etc.

[0182] The motion detection sensor 137 can detect the motion of the aerosol generating device and is implemented by at least one of an acceleration sensor and a gyro sensor.

[0183] The sensor 13 may further include at least one of a humidity sensor, an air pressure sensor, a geomagnetic sensor, a position sensor (GPS), and a proximity sensor in addition to the above-mentioned sensors 131 to 137. The function of each sensor can be intuitively inferred by an ordinary engineer from its name, so a detailed description will be omitted.

[0184] The output unit 14 can output and provide to the user information about the status of the aerosol generation device 1. The output unit 14 includes, but is not limited to, at least one of a display 141, a haptic unit 142, and an audio output unit 143. When the display 141 and the touchpad form a layered structure to form a touch screen, the display 141 is used as an input device in addition to an output device.

[0185] The display 141 can visually provide a user with information about the aerosol generation device 1. For example, the information about the aerosol generation device 1 can mean various information such as the charge / discharge status of the power supply 11 of the aerosol generation device 1, the preheating status of the heater 18, the insertion / removal status of the stick S and / or cartridge 19, the attachment / removal status of a cap, or a status that restricts the use of the aerosol generation device 1 (e.g., abnormal item detection), and the display 141 can output the information to the outside. For example, the display 141 can be in the form of an LED light-emitting element. For example, the display 141 can be a liquid crystal display panel (LCD), an organic light-emitting display panel (OLED), etc.

[0186] The haptic unit 142 can convert an electrical signal into a mechanical or electrical stimulus and provide a user with tactile information about the aerosol generating device 1. For example, the haptic unit 142 generates a vibration corresponding to the completion of initial preheating when initial power is supplied to the cartridge heater 24 and / or the heater 18 for a set time. The haptic unit 142 may include a vibration motor, a piezoelectric element, or an electrical stimulation device.

[0187] The acoustic output unit 143 can audibly provide the user with information about the aerosol generation device 1. For example, the acoustic output unit 143 can convert an electric signal into an acoustic signal and output it to the outside.

[0188] The power source 11 can supply power used to operate the aerosol generation device 1. The power source 11 can supply power to heat the cartridge heater 24 and / or the heater 18. The power source 11 can also supply power necessary for the operation of other components provided in the aerosol generation device 1, such as the sensor 13, the output unit 14, the input unit 15, the communication unit 16, and the memory 17. The power source 11 may be a rechargeable battery or a disposable battery. For example, the power source 11 may be a lithium polymer (LiPoly) battery, but is not limited to this.

[0189] 16, the aerosol generating device 1 may further include a power protection circuit. The power protection circuit is electrically connected to the power supply 11 and may include a switching element.

[0190] The power supply protection circuit can cut off an electrical path to the power supply 11 under predetermined conditions. For example, the power supply protection circuit can cut off the electrical path to the power supply 11 when the voltage level of the power supply 11 is equal to or higher than a first voltage corresponding to overcharging. For example, the power supply protection circuit can cut off the electrical path to the power supply 11 when the voltage level of the power supply 11 is lower than a second voltage corresponding to overdischarging.

[0191] Heater 18 can heat the medium or aerosol-generating substance in stick S by receiving power from power supply 11. Although not shown in Fig. 16, aerosol generation device 1 may further include a power conversion circuit (e.g., a DC / DC converter) that converts the power of power supply 11 and supplies it to cartridge heater 24 and / or heater 18. Furthermore, when aerosol generation device 1 generates aerosol by induction heating, aerosol generation device 1 may further include a DC / AC converter that converts the DC power of power supply 11 into AC power.

[0192] The control unit 12, the sensor 13, the output unit 14, the input unit 15, the communication unit 16, and the memory 17 can function by receiving power from the power supply 11. Although not shown in FIG. 16, the aerosol generating device 1 may further include a power conversion circuit, such as an LDO (low dropout) circuit or a voltage regulator circuit, that converts the power of the power supply 11 and supplies it to each component. Also, although not shown in FIG. 16, a noise filter may be provided between the power supply 11 and the heater 18. The noise filter may also be a low-pass filter. The low-pass filter may include at least one inductor and capacitor. The cutoff frequency of the low-pass filter corresponds to the frequency of the high-frequency switching current applied from the power supply 11 to the heater 18. The low-pass filter can prevent high-frequency noise components from being applied to the sensors 13, such as the insertion detection sensor 133.

[0193] In one embodiment, the cartridge heater 24 and / or heater 18 may be made of any suitable electrically resistive material. For example, suitable electrically resistive materials include, but are not limited to, metals or metal alloys including titanium, zirconium, tantalum, platinum, nickel, cobalt, chromium, hafnium, niobium, molybdenum, tungsten, tin, gallium, manganese, iron, copper, stainless steel, nichrome, etc. Additionally, the heater 18 may be embodied by, but is not limited to, a metal hot wire, a metal hot plate having a conductive track disposed thereon, a ceramic heating element, etc.

[0194] In other embodiments, heater 18 is an induction heater. For example, heater 18 may include a susceptor that generates heat via a magnetic field applied by a coil to heat the aerosol-generating material.

[0195] The input unit 15 can receive information input by a user or output information to a user. For example, the input unit 15 can be a touch panel. The touch panel can include at least one touch sensor that detects a 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.

[0196] The display 141 and the touch panel may be implemented as a single panel. For example, the touch panel may be inserted (on-cell type or in-cell type) into the display 141. For example, the touch panel may be an add-on type on the display 141.

[0197] Meanwhile, the input unit 15 includes, but is not limited to, a button, a keypad, a dome switch, a jog wheel, a jog switch, and the like.

[0198] The memory 17 is hardware that stores various data processed within the aerosol generation device 1 and can store data that has been processed by the control unit 12 and data to be processed by the control unit 12. The memory 17 includes at least one type of recording medium selected from the group consisting of flash memory, hard disk, micro multimedia card, card-type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, and optical disk. The memory 17 can store data related to the operating time of the aerosol generation device 1, the maximum number of puffs, the current number of puffs, at least one temperature profile, and the user's smoking pattern.

[0199] The communication unit 16 includes at least one component for communicating with other electronic devices, such as at least one of a short-range communication unit and a wireless communication unit.

[0200] The short-range wireless communication unit includes, but is not limited to, a Bluetooth (registered trademark) communication unit, a BLE (Bluetooth (registered trademark) Low Energy) communication unit, a Near Field Communication unit, a WLAN (Wi-Fi) communication unit, a Zigbee (registered trademark) communication unit, an IrDA (infrared Data Association) communication unit, a WFD (Wi-Fi Direct) communication unit, a UWB (ultra wideband) communication unit, an Ant+ communication unit, etc.

[0201] The wireless communication unit includes, but is not limited to, a cellular network communication unit, an Internet communication unit, a computer network (eg, LAN or WAN) communication unit, and the like.

[0202] Although not shown in Figure 16, the aerosol generating device 1 further includes a connection interface such as a USB (universal serial bus) interface, and can connect to other external devices through the connection interface such as the USB interface to send and receive information or charge the power source 11.

[0203] The control unit 12 can control the overall operation of the aerosol generating device 1. In one embodiment, the control unit 12 includes at least one processor. The processor may be embodied as an array of multiple logic gates, or may be embodied by a combination of a general-purpose microprocessor and a memory storing a program executable by the microprocessor. Those skilled in the art will understand that the processor may also be embodied by other forms of hardware.

[0204] 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 heater 18 based on the temperature of the cartridge heater 24 and / or heater 18 sensed by the temperature sensor 131. The control unit 12 can adjust the power supplied to the cartridge heater 24 and / or heater 18 based on the temperature of the cartridge heater 24 and / or heater 18. For example, the control unit 12 can determine a target temperature for the cartridge heater 24 and / or heater 18 based on a temperature profile stored in the memory 17.

[0205] The aerosol generating device 1 may include a power supply circuit (not shown) electrically connected to the power supply 11 between the power supply 11 and the cartridge heater 24 and / or the heater 18. The power supply circuit may be electrically connected to the cartridge heater 24, the heater 18, or the induction coil. The power supply circuit includes 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.

[0206] The control unit 12 can control the power supply by controlling the switching of the switching elements of the power supply circuit. The power supply circuit also functions as an inverter that converts DC power output from the power supply 11 into AC power. For example, the inverter is configured with a full-bridge circuit or a half-bridge circuit including multiple switching elements.

[0207] 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 supply to the cartridge heater 24 and / or the heater 18 is cut off. The control unit 12 can adjust the frequency and / or duty ratio of the current pulse input to the switching element to adjust the current supplied from the power source 11.

[0208] The control unit 12 controls the switching of the switching elements of the power supply circuit to control the voltage output from the power supply 11. The power conversion circuit can convert the voltage output from the power supply 11. For example, the power conversion circuit includes a buck converter that boosts the voltage output from the power supply 11. For example, the power conversion circuit can be implemented using a buck-boost converter, a Zener diode, etc.

[0209] The control unit 12 controls the on / off operation of a 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 is maintained, the level of the voltage output from the power conversion circuit corresponds to the level of the voltage output from the power source 11. The duty ratio of the on / off operation of the switching element corresponds 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 of 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 may be heated based on the voltage output from the power conversion circuit.

[0210] The control unit 12 can control the supply of power to the heater 18 using at least one of a pulse width modulation (PWM) method and a proportional-integral-differential (PID) method.

[0211] For example, the control unit 12 can use a PWM method to control current pulses having a predetermined frequency and duty ratio to be supplied to the heater 18. The control unit 12 can adjust the frequency and duty ratio of the current pulses to control the power supplied to the heater 18.

[0212] For example, the control unit 12 can determine a target temperature based on the temperature profile, and can control the power supplied to the heater 18 using a PID method, which is a feedback control method that uses the difference between the temperature of the heater 18 and the target temperature, the value obtained by integrating the difference over time, and the value obtained by differentiating the difference over time.

[0213] The control unit 12 can prevent the cartridge heater 24 and / or the heater 18 from overheating. For example, the control unit 12 can control the operation of the power conversion circuit to interrupt the supply of power to the cartridge heater 24 and / or the heater 18 when the temperature of the cartridge heater 24 and / or the heater 18 exceeds a predetermined 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 when the temperature of the cartridge heater 24 and / or the heater 18 exceeds a predetermined limit temperature. For example, the control unit 12 can determine that the aerosol-generating material contained in the cartridge 19 has been consumed when the temperature of the cartridge heater 24 exceeds the limit temperature, and can interrupt the supply of power to the cartridge heater 24.

[0214] The control unit 12 can control the charging and discharging of the power supply 11. The control unit 12 can check the temperature of the power supply 11 based on the output signal of the temperature sensor 131.

[0215] When a power line is connected to the battery terminal of the aerosol generating device 1, the control unit 12 can check whether the temperature of the power source 11 is equal to or higher than a first limit temperature, which is a criterion for cutting off charging of the power source 11. When the temperature of the power source 11 is lower than the first limit temperature, the control unit 12 can control the power source 11 to be charged based on a predetermined charging current. When the temperature of the power source 11 is equal to or higher than the first limit temperature, the control unit 12 can cut off charging of the power source 11.

[0216] When the aerosol generating device 1 is powered on, the control unit 12 can check whether the temperature of the power source 11 is equal to or higher than a second limit temperature, which is a criterion for cutting off the 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 the power source 11 to use the power stored in the power source 11. If the temperature of the power source 11 is equal to or higher than the second limit temperature, the control unit 12 can stop the use of the power stored in the power source 11.

[0217] The control unit 12 may calculate the remaining capacity of the power stored in the power source 11. For example, the control unit 12 may calculate the remaining capacity of the power source 11 based on the voltage and / or current sensing value of the power source 11.

[0218] The control unit 12 can determine whether the stick S is inserted into the insertion space through the insertion detection sensor 133. The control unit 12 can determine that the stick S has been inserted based on the output signal of the insertion detection sensor 133. If it is determined that the stick S has been inserted into the insertion space, the control unit 12 can control the cartridge heater 24 and / or the heater 18 to supply power. For example, the control unit 12 can supply power to the cartridge heater 24 and / or the heater 18 based on a temperature profile stored in the memory 17.

[0219] The control unit 12 can determine whether the stick S has been removed from the insertion space. For example, the control unit 12 can determine whether the stick S has been removed from the insertion space via the insertion detection sensor 133. For example, the control unit 12 can determine that the stick S has been removed from the insertion space when the temperature of the heater 18 is equal to or higher than a limit temperature or when the temperature change gradient of the heater 18 is equal to or higher than a set gradient. When it is determined that the stick S has been removed from the insertion space, the control unit 12 can cut off the supply of power to the cartridge heater 24 and / or the heater 18.

[0220] The control unit 12 can control the time and / or amount of power supply to the heater 18 depending on the state of the stick S sensed by the sensor 13. The control unit 12 can check the level range that includes the level of the signal from the capacitance sensor based on a lookup table. The control unit 12 can determine the amount of moisture in the stick S based on the checked level range.

[0221] When the stick S is in an over-humid state, the control unit 12 controls the time for which power is supplied to the heater 18, and can increase the pre-heating time of the stick S compared to when the stick S is in a normal state.

[0222] The control unit 12 can determine whether the stick S inserted into the insertion space is reused through the reuse detection sensor 134. For example, the control unit 12 can compare the sensing value of the signal from the reuse detection sensor with a first reference range including a first color, and determine that the stick S has not been used if the sensing value is within the first reference range. For example, the control unit 12 can compare the sensing value of the signal from the reuse detection sensor with a second reference range including a second color, and determine that the stick S has been used if the sensing value is within the second reference range. 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.

[0223] The control unit 12 can determine whether to connect and / or remove the cartridge 19 through the cartridge detection sensor 135. For example, the control unit 12 can determine whether to connect and / or remove the cartridge 19 based on the sensing value of the signal of the cartridge detection sensor 135.

[0224] The control unit 12 can determine whether the aerosol generating material in the cartridge 19 has been exhausted. For example, the control unit 12 can apply power to preheat the cartridge heater 24 and / or heater 18, determine whether the temperature of the cartridge heater 24 exceeds a limit temperature during the preheating period, and determine that the aerosol generating material in the cartridge 19 has been exhausted if the temperature of the cartridge heater 24 exceeds the limit temperature. If the control unit 12 determines that the aerosol generating material in the cartridge 19 has been exhausted, it can cut off the supply of power to the cartridge heater 24 and / or heater 18.

[0225] The control unit 12 can determine whether the cartridge 19 can be used. For example, the control unit 12 can determine that the cartridge 19 cannot be used if the current number of puffs is equal to or greater than the maximum number of puffs set for the cartridge 19 based on the data stored in the memory 17. For example, the control unit 12 can determine that the cartridge 19 cannot be used if the total time that the heater 24 has been heated is equal to or greater than a predetermined maximum time or if the total amount of power supplied to the heater 24 is equal to or greater than a predetermined maximum amount of power.

[0226] The control unit 12 can determine whether the user is inhaling through the puff sensor 132. For example, the control unit 12 can determine whether a puff has occurred based on the sensed value of the signal from the puff sensor 132. For example, the control unit 12 can determine the strength of the puff based on the sensed value of the signal from the puff sensor 132. If the number of puffs reaches a predetermined maximum number of puffs or if no puffs are sensed for a predetermined period of time or longer, the control unit 12 can cut off the supply of power to the cartridge heater 24 and / or the heater 18.

[0227] The control unit 12 can determine whether the cap is attached and / or removed through the cap detection sensor 136. For example, the control unit 12 can determine whether the cap is attached and / or removed based on the sensing value of the signal of the cap detection sensor 136.

[0228] The control unit 12 can control the output unit 14 based on the results sensed by the sensor 13. For example, if the number of puffs counted by the puff sensor 132 reaches a predetermined number, the control unit 12 can notify the user that the aerosol generation device 1 will soon be shut down through at least one of the display 141, the haptic unit 142, and the audio output unit 143. For example, the control unit 12 can notify the user that the aerosol generation device 1 will soon be shut down through the output unit 14 based on a determination that the stick S is not present in the insertion space. For example, the control unit 12 can notify the user that the aerosol generation device 1 will soon be shut down through the output unit 14 based on a determination that the cartridge 19 and / or the cap are not attached. 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.

[0229] The control unit 12 can store and update a history of events that have occurred in the memory 17 based on the occurrence of a predetermined event. The events include, for example, detection of insertion of the stick S, start of heating of the stick S, detection of puffing, end of puffing, 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, end of heating of the stick S, operations such as turning the power of the aerosol generation device 1 on / off, start of charging the power source 11, detection of overcharging of the power source 11, and end of charging the power source 11, which are performed in the aerosol generation device 1. The history of events includes the date and time when the event occurred, log data corresponding to the event, etc. For example, if the predetermined event is detection of insertion of the stick S, the log data corresponding to the event includes data on the sensing value of the insertion detection sensor 133, etc. For example, if a given event is the detection of overheating of the cartridge heater 24 and / or heater 18, the log data corresponding to the event may include data regarding 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.

[0230] The control unit 12 can control the establishment of a communication link with an external device, such as a user's mobile terminal. When authentication-related data is received from the external device through the communication link, the control unit 12 can remove restrictions on the use of at least one function of the aerosol generation device 1. Here, the authentication-related data includes data indicating completion of user authentication for the 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 identifying the user, etc., and receive data regarding usage authority for the aerosol generation device 1 from an external server. The external device can transmit data indicating completion of user authentication to the aerosol generation device 1 based on the data regarding usage authority. When user authentication is completed, the control unit 12 can remove restrictions on the use of at least one function of the aerosol generation device 1. For example, when user authentication is completed, the control unit 12 can remove restrictions on the use of a heating function that supplies power to the heater 18.

[0231] The control unit 12 can transmit data related to the status of the aerosol generation device 1 to the external device through a communication link formed with the external device. Based on the received status data of the aerosol generation device 1, the external device can output the remaining capacity of the power supply 11 of the aerosol generation device 1, the operation mode, etc. through a display of the external device.

[0232] The external device may transmit a location search request to the aerosol generation device 1 based on an input to start a location search of the aerosol generation device 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, the haptic unit 142 may generate a vibration in response to the location search request. For example, the display 141 may output an object corresponding to the location search and the end of the search in response to the location search request.

[0233] The control unit 12 can control to perform a firmware update when it receives firmware data from an external device. The external device can check the current version of the firmware of the aerosol generation device 1 and determine whether a new version of the firmware exists. When the external device receives an input requesting a firmware download, it can receive firmware data of the new version and transmit the firmware data of the new version to the aerosol generation device 1. The control unit 12 can control to perform a firmware update of the aerosol generation device 1 by receiving the firmware data of the new version.

[0234] The control unit 12 may transmit data related to sensing values ​​of at least one sensor 13 to an external server (not shown) via the communication unit 16 and receive and store a learning model generated by learning the sensing values ​​through machine learning, such as deep learning, from the server. The control unit 12 may perform operations such as determining a user's inhalation pattern and generating a temperature profile using the learning model received from the server. The control unit 12 may store sensing value data of at least one sensor 13 and data for training an artificial neural network (ANN) in the memory 17. For example, the memory 17 may store a database related to each component included in the aerosol generation device 1 for training the artificial neural network (ANN), as well as weights and biases constituting the artificial neural network (ANN). The control unit 12 may learn data related to sensing values ​​of at least one sensor 13, a user's inhalation pattern, a temperature profile, and the like stored in the memory 17, and generate at least one learning model used for determining a user's inhalation pattern, generating a temperature profile, and the like.

[0235] The above-described embodiments of the present invention or other embodiments are not mutually exclusive or distinct, and the respective configurations or functions of the above-described embodiments of the present invention or other embodiments may be used together or combined.

[0236] For example, it means that a configuration A illustrated in a particular embodiment and / or drawing can be combined with a configuration B illustrated in another embodiment and / or drawing. In other words, even if a combination between components is not directly described, it means that the combination is possible unless it is described that the combination is not possible.

[0237] The above detailed description should not be construed as limiting in any respect, but should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all modifications within the equivalent range of the present invention are included in the scope of the present invention.

Claims

1. In the aerosol generating device, The main body and a cartridge detachably coupled to the main body; The cartridge comprises: a storage tank in which the aerosol-generating material is stored; a heating structure that heats the aerosol-forming material; a wick that supplies the aerosol-generating substance stored in the storage tank to the heat-generating structure; The body includes: a cartridge sensing circuit for sensing the temperature of the heat generating structure of the cartridge, wherein a capacitor is not connected to an output terminal of the cartridge sensing circuit; and a processor electrically coupled to the cartridge sensing circuit; The processor: Sense the temperature of the heat generating structure through the cartridge sensing circuit; An aerosol generating device that controls power supply to the cartridge based on the sensed temperature of the heat generating structure.

2. The processor: comparing the sensed temperature of the heat generating structure to a threshold temperature; The aerosol generating device of claim 1 , wherein power supply to the cartridge is interrupted based on the sensed temperature of the heat generating structure exceeding the threshold temperature.

3. The aerosol generating device according to claim 2 , wherein the threshold temperature is a preset temperature within a range of 200° C. to 260° C.

4. The processor: obtaining a temperature change amount of the heat-generating structure according to the sensed temperature of the heat-generating structure; comparing the temperature change amount and critical change amount of the heat generating structure obtained; The aerosol generating device according to claim 1 , wherein power supply to the cartridge is interrupted based on the obtained temperature change amount of the heat generating structure exceeding the critical change amount.

5. The main body further includes a puff sensor that senses a puff by a user; The processor: The aerosol generating device according to claim 1 , wherein the temperature of the heat generating structure is sensed through the cartridge sensing circuit based on the user's puff sensed through the puff sensor.

6. The processor: The aerosol generating device according to claim 5, wherein the temperature of the heat generating structure is sensed 1 μs to 200 μs after the puff sensor senses the user's puff.

7. The aerosol generating device according to claim 1 , wherein the processor detects a resistance value of the heat generating structure.

8. The aerosol generating device according to claim 1 , wherein the heat generating structure is a coil heater extending around the wick.

9. 1. A method of operating an aerosol generating device, comprising: sensing the temperature of a heat generating structure included in the cartridge through a cartridge sensing circuit having no capacitor connected to its output end; and controlling power supply to the cartridge based on the sensed temperature of the heat-generating structure.

10. The step of controlling the power supply to the cartridge includes: comparing the sensed temperature of the heat generating structure to a threshold temperature; and interrupting power supply to the cartridge based on the sensed temperature of the heat-generating structure exceeding the threshold temperature.

11. The method of claim 10, wherein the threshold temperature is a preset temperature within a range of 210°C to 260°C.

12. The step of controlling the power supply to the cartridge includes: obtaining a temperature change amount of the heat-generating structure according to the sensed temperature of the heat-generating structure; comparing the acquired temperature change amount and critical change amount of the heat generating structure; and interrupting power supply to the cartridge based on the obtained temperature change amount of the heat-generating structure exceeding the critical change amount.

13. The step of sensing the temperature of the heat generating structure includes:

10. A method for operating an aerosol generating device as described in claim 9, comprising a step of sensing the temperature of the heat generating structure through the cartridge sensing circuit based on a user's puff sensed through a puff sensor.

14. The method for operating the aerosol generating device according to claim 13, comprising the step of sensing the temperature of the heat generating structure 1 μs to 200 μs after the point in time when the user's puff is sensed through the puff sensor.

15. The step of sensing the temperature of the heat generating structure includes: The method for operating the aerosol generating device according to claim 9, comprising the step of detecting a resistance value of the heating structure.

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