Cartridge and aerosol generating device including the same

Abstract

A cartridge and an aerosol generating device including the cartridge are disclosed. The cartridge of the present disclosure includes a first chamber for storing a liquid, a second chamber through which air can pass, a wick extending across the second chamber and receiving the liquid from the first chamber, and a heating coil for heating the wick, the wick being a silica wick, and the heating coil having an electrical resistance in the range of 1.0Ω to 1.3Ω.

Description

[Technical Field]

[0001] The present disclosure relates to a cartridge and an aerosol generating device including the same. [Background technology]

[0002] An aerosol generating device is used to extract a predetermined component from a medium or substance via an aerosol. The medium may contain a variety of components. The components contained in the medium may be flavorings of a variety of components. For example, the components contained in the medium may include nicotine, herbal, and / or coffee components. In recent years, much research has been conducted on such aerosol generating devices. Summary of the Invention [Problem to be solved by the invention]

[0003] The present disclosure is directed to solving the above-mentioned problems and other problems.

[0004] Another object of the present disclosure is to improve user satisfaction with puffs.

[0005] It is yet another object of the present disclosure to reduce excessive power consumption. [Means for solving the problem]

[0006] According to one aspect of the present disclosure to achieve the above-mentioned object, there is provided a cartridge including a first chamber for storing liquid, a second chamber through which air can pass, a wick extending across the second chamber and receiving liquid from the first chamber, and a heating coil for heating the wick, wherein the wick is a silica wick and the heating coil has an electrical resistance of 1.0Ω to 1.3Ω. [Effects of the Invention]

[0007] According to at least one of the embodiments of the present disclosure, user satisfaction with the puff can be improved.

[0008] According to at least one of the embodiments of the present disclosure, excessive power consumption can be reduced.

[0009] Further scope of applicability of the present disclosure will become apparent from the following detailed description. However, since various changes and modifications within the spirit and scope of the present disclosure will be apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present disclosure, are given by way of example only. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. [Figure 2] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. [Figure 3] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. [Figure 4] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. [Figure 5] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. [Figure 6] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. [Figure 7] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. [Figure 8] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. [Figure 9] FIG. 1 illustrates an example of an aerosol generating device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. The same or similar components are given the same reference numerals even if they are shown in different drawings, and redundant description thereof will be omitted.

[0012] The suffixes "module" and "section" for components used in the following description are used solely for the convenience of explanation of the specification. "Module" and "section" do not have different meanings or roles from each other.

[0013] Furthermore, in the following description of the embodiments disclosed herein, detailed descriptions of related known technologies may be omitted if they may obscure the gist of the embodiments disclosed herein. The accompanying drawings are provided to facilitate understanding of the embodiments disclosed herein, and do not limit the technical ideas disclosed herein. Therefore, the accompanying drawings should be interpreted as including all modifications, equivalents, and alternatives within the spirit and scope of the present disclosure.

[0014] Terms including ordinal numbers such as "first," "second," etc. may be used to describe various components, but it should be understood that the components are not limited by the terms. The terms are used only to distinguish one component from another.

[0015] When a component is said to be "connected" to another component, it will be understood that there may be other components in between, whereas when a component is said to be "directly connected" to another component, it will be understood that there are no other components in between.

[0016] The singular expression includes the plural expression unless the context clearly dictates otherwise.

[0017] 1 and 2, the aerosol generating device may include at least one of a battery 10, a control unit 20, a heater 30, and a cartridge 40. At least one of the battery 10, the control unit 20, the heater 30, and the cartridge 40 may be disposed inside a body 110 of the aerosol generating device.

[0018] The body 110 may have an insertion space 34 into which the stick 200 can be inserted. The insertion space 34 may be open at the top. The insertion space 34 may have a cylindrical shape that extends vertically. The heater 30 may be formed around the insertion space 34. For example, the heater 30 may surround the periphery of the insertion space 34.

[0019] 1, the battery 10, the control unit 20, the cartridge 40, and the heater 30 may be arranged in a line. Referring to Fig. 2, the cartridge 40 and the heater 30 may be arranged side by side so as to face each other. The internal structure of the aerosol generating device 100 is not limited to that shown in the figure.

[0020] The battery 10 can supply power to operate at least one of the control unit 20, the heater 30, and the cartridge 40. The battery 10 can supply power necessary to operate the display, sensor, motor, etc. provided in the aerosol generating device 100.

[0021] The control unit 20 can control the overall operation of the aerosol generation device 100. The control unit 20 can control the operation of at least one of the battery 10, the heater 30, and the cartridge 40. The control unit 20 can control the operation of a display, a sensor, a motor, etc. provided in the aerosol generation device 100. The control unit 20 can check the status of each component of the aerosol generation device 100 and determine whether the aerosol generation device 100 is in an operable state.

[0022] The heater 30 can generate heat using the power supplied from the battery 10. The heater 30 can heat the stick 200 inserted into the insertion space 34.

[0023] The cartridge 40 can generate an aerosol. The aerosol generated in the cartridge 40 can be transmitted to a user through the stick 200 inserted into the aerosol generating device 100.

[0024] The lower part of the stick 200 is inserted into the insertion space 34, and the upper part is exposed to the outside. A user can inhale air by holding the upper part of the stick 200 in their mouth. When a user inhales air through the stick 200, the air flows into the cartridge 40, and then, together with the aerosol, passes through the insertion space 34 and the stick 200 inserted into the insertion space 34 and is provided to the user.

[0025] 3, the cartridge 40 may include a first container 41 and a second container 42. The second container 42 may be coupled to the bottom of the first container 41. The cartridge inlet 414 may be formed by opening one side of the cartridge 40. The cartridge inlet 414 may be formed by opening the top end of the first container 41. The cartridge inlet 414 may be connected to the outside. Air outside the cartridge 40 may flow into the cartridge 40 through the cartridge inlet 414.

[0026] 4 to 6, the cartridge 40 may include a first container 41 and a second container 42. The first container 41 may be coupled to the upper side of the second container 42. A plate 45 may be coupled between the first container 41 and the second container 42 or between the first container 41 and the frame 43.

[0027] The first container 41 may have a first chamber C1 capable of storing a liquid therein. The first container 41 surrounds the first chamber C1, and the bottom of the first chamber C1 may be open. The opening of the first chamber C1 may be covered by a plate 45.

[0028] The first container 41 may have an inlet passage 412 through which air passes. The first chamber C1 and the inlet passage 412 may be isolated from each other. The inlet passage 412 may extend vertically on one side of the first container 41. The first chamber C1 and the inlet passage 412 may be formed side by side.

[0029] The first container 41 may have a cartridge inlet 411. The cartridge inlet 411 may be formed by opening the top of the first container 41 and may be connected to the inlet channel 412. The cartridge inlet 411 may be connected to an upper end of the inlet channel 412. A lower end of the inlet channel 412 may be connected to the connecting hole 451, the frame channel 451, and the chamber inlet 431.

[0030] The second container 42 may be coupled to the bottom of the first container 41. The second container 42 may have a space 424 that is open at the top and covered at the bottom. The frame 43 may be housed inside the space 424 of the second container 42.

[0031] The second container 42 may include a cartridge discharge port 422. The cartridge discharge port 422 may be formed on one side of the second container 42. The cartridge discharge port 422 may be formed inside a discharge port 423 that protrudes from the side of the second container 42 in the thickness direction. The cartridge discharge port 422 may communicate with a space 424 inside the second container 42.

[0032] The frame 43 can be inserted into the space 424 inside the second container 42 and coupled to the second container 42. Fastening members 426 protruding from the sidewalls of the second container 42 into the space 424 can be fastened to the frame 43 to fix the frame 43.

[0033] The frame 43 may have a second chamber C2 therein. The frame 43 surrounds the second chamber C2, and the top of the second chamber C2 may be open. The top of the second chamber C2 may be covered by a plate 45.

[0034] The frame 43 may include a chamber inlet 431. The chamber inlet 431 may be formed by opening one surface of a sidewall surrounding the second chamber C2. The chamber inlet 431 may be in communication with the second chamber C2. The frame channel 4310 may open to the upper side of the frame 43. The chamber inlet 431 may be connected to one end of the frame channel 4310. The frame channel 4310 may extend downward from the upper end of the frame channel 4310 and extend in a curved shape to the chamber inlet 431.

[0035] The frame 43 may include a chamber outlet 432. The chamber outlet 432 may be formed on one side of the frame 43. The chamber outlet 432 may be in communication with the second chamber C2. The chamber outlet 432 may be formed inside a port protruding from the side of the frame 43 in the thickness direction. The chamber outlet 432 may be in communication with the second chamber C2. The chamber outlet 432 may be formed at a position corresponding to the cartridge outlet 422. The chamber outlet 432 may be formed at a position opposite the second chamber inlet 431 with respect to the second chamber C2. When the frame 43 is coupled to the second container 32, the chamber outlet 432 and the cartridge outlet 422 may be in communication with each other.

[0036] The frame 43 may have a core groove 434 therein. The core groove 434 may be in communication with the second chamber C2. The core groove 434 may be formed by recessing one side of the second chamber C2. The core grooves 434 may be formed in pairs. The pair of core grooves 434 may be formed on both sides of the second chamber C2. The pair of core grooves 434 may face each other with the second chamber C2 at the center. The top of the core groove 434 may be open.

[0037] The wick 441 may have a cylindrical shape extending horizontally in the second chamber C2. Both ends of the wick 441 may be inserted into each of the pair of wick grooves 434. The center of the wick 441 may be located in the second chamber C2. The wick 441 may extend longitudinally from one side of the second chamber C2 to the other. The wick 441 is connected to the first chamber C1 and can receive liquid from the first chamber C1. The wick 441 may be fixed in the wick groove 434 by the frame 43 and plate 45.

[0038] The heating coil 442 may be wound around the center of the core 441. The heating coil 442 may be wound along the longitudinal direction of the core 441. The heating coil 442 may be disposed in the second chamber C2. The heating coil 442 may be located between a pair of core grooves 434.

[0039] The heating coil 442 may be an electric resistance heater. When the heating coil 442 receives an electric current, heat is generated due to internal resistance, and the heat may be released to the outside. The heating coil 442 generates heat to heat the wick 441. The heating coil 442 may be a conductor.

[0040] The leads 443 may be electrically connected to the ends of the heating coil 442. The leads 443 may be formed as a pair and electrically connected to both ends of the heating coil 442, respectively. The leads 443 may extend from the ends of the heating coil 442 to the outside of the core 441. The leads 443 may penetrate the bottom of the frame 43 and be electrically connected to electrodes disposed on the bottom of the second container 42. The battery 10 can apply current to the leads 443 and the heating coil 442 sequentially to cause the heating coil 442 to heat up. The leads 443 may be a conductor.

[0041] The heating coil 442 and the lead 443 may be formed of different materials. The lead 443 may be formed of a material having a lower resistance than the heating coil 442. The lead 443 may be formed of a material having a lower temperature coefficient of resistance (TCR) than the heating coil 442. The heating coil 442 may be formed of a material having a large TCR, and the lead 443 may be formed of a material having a relatively small TCR.

[0042] For example, the heater 30 and the heating coil 442 may include any one of Kanthal, nichrome, and stainless steel. The heater 30 may include 316L stainless steel, which is a type of stainless steel. For example, the lead 443 may include any one of nickel, gold, and silver. However, the materials of the heating coil 442 and the lead 443 are not limited to the above examples.

[0043] Therefore, when a current flows, the resistance change amount of the lead 443 is relatively small, and it can have high safety against resistance.

[0044] The heater 30 is made of a type of stainless steel, such as 316L stainless steel. 316L stainless steel is a low-carbon steel with excellent intergranular corrosion resistance and heat resistance. This allows the heater 30 to be more stable in the high-temperature and high-humidity internal environment of the cartridge.

[0045] The plate 451 can be coupled between the first container 41 and the second container 42 or between the first container 41 and the frame 43. The plate 45 can cover and seal the opening of the first chamber C1. The plate 45 can cover the top of the frame 43. The plate 45 can cover and seal the opening of the second chamber C2. The plate 45 can be disposed between the first chamber C1 and the second chamber C2 and can separate the first chamber C1 and the second chamber C2.

[0046] The plate 45 may have a connection hole 451 on one side thereof. The connection hole 451 may be located between the inlet channel 412 and the frame channel 4310. The connection hole 451 may connect the inlet channel 412 and the frame channel 4310.

[0047] The plate 45 may have liquid inlet holes 454. A pair of the liquid inlet holes 454 may be formed at positions corresponding to the core grooves 434. The pair of liquid inlet holes 454 may be located on the upper sides of both ends of the core 441. The liquid inlet holes 454 may connect the first chamber C1 and the core grooves 434. The core 441 may be connected to the first chamber C1 through the liquid inlet holes 454.

[0048] The hook groove 435 may be formed adjacent to the chamber outlet 432 and above the chamber outlet 432. The hook 453 may protrude downward from one side of the plate 45. The hook 453 may be inserted into the hook groove 435 formed in the upper part of the frame 43 to be fastened. When the plate 45 is fastened to the frame 43, the first container 41 coupled to the second container 42 can press the edge of the plate 45 toward the frame 43.

[0049] Air can flow into the cartridge 40 through the cartridge inlet 411 and be discharged to the outside of the cartridge 40 through the cartridge outlet 422. The air that has flowed into the cartridge 40 can be discharged to the outside after passing through the inlet channel 412, the connecting hole 451, the frame flow path 4310, the chamber inlet 431, the second chamber C2, the chamber outlet 432, and the cartridge outlet 422 in sequence.

[0050] When the heating coil 442 generates heat and heats the wick 441, an aerosol can be formed in the second chamber C2 from the wick 441. Air passing through the cartridge 40 can be discharged to the cartridge outlet 422 in the second chamber C2, carrying the aerosol with it.

[0051] 7 and 8, a pair of core grooves 434 may be formed on both sides of the second chamber C2. The distance L3 between the pair of core grooves 434 may be defined as the distance between the inner ends of each of the pair of core grooves 434 based on the longitudinal direction of the core 441. The distance L3 between the pair of core grooves 434 may be the same as the distance L3 from one side to the other of the second chamber C2 or the width l3 of the second chamber C2. For example, the distance L3 between the pair of core grooves 434 may be approximately 4.5 mm to 5.4 mm. As another example, the distance L3 between the pair of core grooves 434 may be approximately 4.9 mm.

[0052] The core 441 may extend elongately on one side. The core 441 may have peripheral portions 441a and a central portion 441b. The peripheral portions 441a may be formed on both ends, and the central portion 441b may be formed between the pair of peripheral portions 441a.

[0053] Each end of the core 441 may be inserted into each of the pair of core grooves 434. Each of the pair of peripheral portions 441a may be located in each of the pair of core grooves 434, and the central portion 441b may be located inside the second chamber C2. The core 441 may extend from one side to the other of the core groove 434. The length L1 of the core 441 may be longer than the distance L3 between the pair of core grooves 434. For example, the length L1 of the core 441 may be approximately 6 mm to 12 mm. As another example, the length of the core 441 may be approximately 8 mm to 10 mm. As another example, the length L1 of the core 441 may be approximately 9 mm.

[0054] The wick 441 can be wetted by receiving liquid from the first chamber C1 (see FIG. 5). The wick 441 can be made of a material that takes into consideration liquid absorbency and heat resistance. For example, the wick 441 can be a cotton wick made of cotton. For another example, the wick 441 can be a silica wick made of silica fiber. The silica wick can contain 90% or more silicon dioxide. The cotton wick has relatively better liquid absorbency than the silica wick. However, the silica wick does not melt even at a high temperature of 1400°C and has excellent heat resistance up to about 700°C, making it more heat-resistant than the cotton wick. When the wick 441 is a silica wick, it can prevent the wick 441 from being burned by the heat of the heating coil 442, which would otherwise cause an unpleasant burnt taste to the user, thereby achieving a stable taste.

[0055] The heating coil 442 may be wound around the central portion 441b of the core 441 in the longitudinal direction of the core 441. The central portion 441b may be disposed inside the heating coil 442, and the peripheral portion 441a may be disposed outside the heating coil 442.

[0056] The length L2 of the heating coil 442 may be defined as the length of the wick 441 in the longitudinal direction. The heating coil 442 may be disposed inside the second chamber C2. The length L2 of the heating coil 442 may be determined taking into account the distance L3 from one side to the other of the wick groove 434. The length L2 of the heating coil 442 may be shorter than the distance L3 from one side to the other of the wick groove 434 through which the wick 441 extends. For example, the heating coil 442 may have a length L2 of approximately 3.0 mm to 3.5 mm in the longitudinal direction of the wick 441. As another example, the length L2 of the heating coil 442 may be approximately 3.25 mm. The length of the center portion 441b of the wick 441 may be the same as or similar to the length L2 of the heating coil 442. This increases the range in which the wick 441 is atomized in the second chamber C2.

[0057] 9 is a graph that schematically illustrates the amount of aerosol generated by the wick 441 and heating coil 442 absorbing liquid from the first chamber C1. The amount of aerosol generated by the wick 441 can be identified by the mass loss (ML) (milligrams) per puff, which may correspond to the measured mass loss for the cartridge 40 due to a machine puff with fixed characteristics and a fixed voltage applied to the heating coil 442. In terms of user satisfaction, a mass loss per puff of 8 mg is considered a good target.

[0058] The wick 441 is a wick made of silica fiber, i.e., a silica wick. Figure 9 shows the results for heating coil 442 resistances of 1.0Ω, 1.1Ω, 1.2Ω, 1.3Ω, 1.4Ω, 1.5Ω, and 1.6Ω for the silica wick. Figure 9 shows multiple measurements obtained by measuring the mass loss per puff while applying the same voltage to heating coils 442 having different resistance values. Figure 9 also shows the trend in mass loss per puff by linking the average mass loss per puff values ​​together.

[0059] It can be seen that the higher the resistance of the coil, the lower the power consumption for each puff. The lower the resistance of the heating coil 442, the higher the temperature of the coil and the smoother the aerosol generation. However, an excessive increase in temperature can cause the liquid to have a burnt taste and can increase the power consumption of the device. On the other hand, the higher the resistance of the heating coil 442, the lower the power consumption of the device but the less aerosol generation there can be.

[0060] The heating coil 442 may have a resistance of approximately 1.0 Ω to 1.3 Ω. As another example, the heating coil 442 may have a resistance of approximately 1.1 Ω to 1.25 Ω. As another example, the heating coil 442 may have a resistance of approximately 1.1 Ω. Here, the electrical resistance based on the cartridge assembly may have a value of 1.20 Ω to 1.25 Ω. Therefore, the target mass loss per puff of 8 mg can be sufficiently achieved.

[0061] 7 to 9, the resistance value of the heating coil 442 can be affected by the magnetic permeability of the material of the heating coil 442, the number of times the heating coil 442 is wound around the core 441, the wire thickness or gauge of the heating coil 442, the length L2 of the heating coil 442, the area of ​​the area surrounded by the heating coil 442, etc. The resistance value of the heating coil 442 can be increased as the number of times the heating coil 442 is wound around the core 441 increases, the gauge of the heating coil 442 increases, the length L2 of the heating coil 442 decreases, and the area of ​​the area of ​​the core 441 surrounded by the heating coil 442 increases. The heating coil 442 can be configured to have a resistance value of 1.0Ω to 1.3Ω within a predetermined range of the length L2. Specifications for the heating coil 442 to have a resistance value of 1.0Ω to 1.3Ω are described below.

[0062] The heating coil 442 may be wound around the center portion 441b of the core 441 to form an outer diameter D2 of the center portion 441b. The outer diameter D1 of the core 441 may be defined as the outer diameter D1 of the peripheral portion 441a. The outer diameter D2 of the center portion 441b may be smaller than the outer diameter D1 of the peripheral portion 441a. For example, the outer diameter D1 of the peripheral portion 441a may be approximately 2 mm to 3.5 mm. As another example, the outer diameter D1 of the peripheral portion 441a may be approximately 2.5 mm to 3.0 mm. For example, the outer diameter D2 of the center portion 441b may be approximately 1.8 mm to 2.2 mm. As another example, the outer diameter D2 of the center portion 441b may be approximately 2 mm. The area of ​​the region surrounded by the heating coil 442 may be determined by the outer diameter D2 of the center portion 441b.

[0063] As described above, the length L2 of the heating coil 442 can be determined in consideration of the distance L3 from one side to the other side of the core groove 434. For example, the length L2 of the heating coil 442 can be 3.0 mm to 3.5 mm. As another example, the length L2 of the heating coil 442 can be 3.25 mm.

[0064] The wires of the heating coil 442 may be wound around the core 441 at a predetermined interval w, without contacting each other in the longitudinal direction of the core 441. At the center 441b, the interval w between the wires of the heating coil 442 may be 0.38 mm to 0.42 mm. This prevents short circuits that may occur due to contact between the wires of the heating coil 442 through which current flows.

[0065] The heating coil 442 may be wound around the core 441 within a predetermined length L2 range and diameter D2 range, taking into consideration the area of ​​the heating portion of the core and the target resistance value, so that the wires do not interfere with each other. For example, the heating coil 442 may be wound around the core 441 seven to nine times. As another example, the heating coil 442 may be wound around the core 441 eight times.

[0066] The heating coil 442 may be formed of a material having an appropriate gauge to have a resistance value of 1.0 Ω to 1.3 Ω depending on the specifications of the heating coil 442 described above. For example, the heating coil 442 may be formed to have a thickness of 20 Ga to 30 Ga. For example, the heating coil 442 may be formed to have a thickness of any one of 22 Ga, 24 Ga, 26 Ga, 28 Ga, or 30 Ga. For example, the heating coil 442 may be formed of any one of metals such as Kanthal, nichrome, and stainless steel. For example, the heating coil 442 may be formed of 316L stainless steel, which is a type of stainless steel. However, the gauge and material of the heating coil 442 may be combined as appropriate.

[0067] In one embodiment of the present invention, the wick 441 may be a silica wick. The electrical resistance of the heating coil 442 may be 1.10Ω to 1.20Ω. The electrical resistance of the heating coil 442 may be 1.15Ω. To achieve the required electrical resistance of the heating coil 442, the heating coil 442 may be wound eight times around the wick 441 with a length L2 of approximately 3.25 mm in the longitudinal direction of the wick 441. The outer diameter of the wick 441 may be approximately 2.5 mm. The heating coil 442 may be wound so that the coils do not come into contact with each other. The heating coil 442 may be made of a stainless steel material, such as 316L stainless steel. Analysis of the glycerin component vaporized by the aerosol generator including the cartridge according to this embodiment revealed that the aerosol generator effectively prevents thermal decomposition. As a result, the aerosol generating device can prevent the wick 441 from burning due to an excessive rise in the temperature of the heating coil 442, thereby providing a stable aerosol to the user.

[0068] 1 to 9, a cartridge according to one aspect of the present disclosure includes a first chamber for storing a liquid, a second chamber through which air can pass, a wick extending across the second chamber and receiving the liquid from the first chamber, and a heating coil for heating the wick, wherein the wick is a silica wick and the heating coil may have an electrical resistance in the range of 1.0Ω to 1.3Ω.

[0069] According to another aspect of the present disclosure, the heating coil may have an electrical resistance of 1.15 Ω.

[0070] According to another aspect of the present disclosure, the electrical resistance of the heating coil may be in the range of 1.20Ω to 1.25Ω.

[0071] According to another aspect of the present disclosure, the heating coil may have a length of 3.0 mm to 3.5 mm in the longitudinal direction of the core, and may be wound around the core 7 to 9 times.

[0072] According to another aspect of the present disclosure, the heating coil may be wound eight times around the core.

[0073] According to another aspect of the present disclosure, the wires of the heating coil may be wound around the core at intervals w of 0.38 mm to 0.42 mm from each other in the longitudinal direction of the core.

[0074] According to another aspect of the present disclosure, the cartridge includes a pair of core grooves formed on both sides of the second chamber, each accommodating a corresponding end of the core, the heating coil being wound around the core between the pair of core grooves, and the distance between the pair of core grooves may be in the range of 4.7 mm to 5.1 mm.

[0075] According to another aspect of the present disclosure, the core may have a length L1 of 6 mm to 12 mm.

[0076] According to another aspect of the present disclosure, the lead may have an outer diameter D1 of 2.5 mm to 3.0 mm.

[0077] According to another aspect of the present disclosure, the outer diameter D1 of the core may be 2.5 mm.

[0078] According to another aspect of the present disclosure, the center of the core around which the heating coil is wound may have an outer diameter D2 of 1.9 mm to 2.1 mm, and the peripheral portion of the core on which the heating coil is not wound may have an outer diameter D1 of 2.5 mm to 3.0 mm.

[0079] According to another aspect of the present disclosure, the cartridge may further include leads electrically coupled to both ends of the heating coil, extending from the core, and formed of a material having a lower temperature coefficient of resistance (TCR) than the material of the heating coil.

[0080] According to another aspect of the present disclosure, the heating coil may be formed of any one of Kanthal, nichrome, or stainless steel, and the leads may be formed of any one of nickel, gold, or silver.

[0081] According to another aspect of the present disclosure, the heating coil can include 316L stainless steel.

[0082] An aerosol generating device according to one aspect of the present disclosure may include a body to which the cartridge is coupled, and a long insertion space formed inside the body and connecting the cartridge to the outside of the aerosol generating device.

[0083] The specific embodiments or other embodiments of the present disclosure described above are not mutually exclusive or distinct, and the structure or function of any or all elements of the embodiments of the present disclosure described above can be combined with other elements or combined with each other.

[0084] For example, configuration A described in one embodiment of the present disclosure and drawings and configuration B described in another embodiment of the present disclosure and drawings can be combined with each other. That is, even if a combination between configurations is not directly described, the combination is possible unless it is described that the combination is not possible.

[0085] While the embodiments have been described above in accordance with a number of exemplary embodiments, it should be understood that many other variations and embodiments are possible for those skilled in the art that fall within the scope of the principles of the present disclosure. More particularly, various modifications and variations are possible in the components and / or arrangements of the subject combinations within the scope of the present disclosure, the drawings, and the appended claims. In addition to the modifications and variations of the components and / or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. a first chamber for storing a liquid; a second chamber through which air can pass; a wick extending across the second chamber and adapted to receive liquid from the first chamber; a heating coil for heating the wick; a pair of core grooves formed on opposite sides of the second chamber, each of which receives a corresponding end of the core; the wick is a silica wick, the heating coil has an electrical resistance in the range of 1.0 Ω to 1.15 Ω; the heating coil is wound around the core between the pair of core grooves; A cartridge, wherein the distance between the pair of core grooves is in the range of 4.7 mm to 5.1 mm.

2. 2. The cartridge according to claim 1, wherein the heating coil has a length of 3.0 mm to 3.5 mm in the longitudinal direction of the core and is wound around the core 7 to 9 times.

3. 3. The cartridge of claim 2, wherein the heating coil is wound eight times around the core.

4. The cartridge of claim 2 , wherein the heating coil comprises a wire wound around the core at intervals w of 0.38 mm to 0.42 mm in the longitudinal direction of the core.

5. The cartridge of claim 1 , wherein the wick has a length of between 6 mm and 12 mm.

6. The cartridge of claim 1 , wherein the wick has an outer diameter of 2.5 mm to 3.0 mm.

7. 7. The cartridge of claim 6, wherein the outer diameter of the core is 2.5 mm.

8. The center of the core around which the heating coil is wound has an outer diameter of 1.9 mm to 2.1 mm; 7. The cartridge according to claim 6, wherein the peripheral portion of the core where the heating coil is not wound has an outer diameter of 2.5 mm to 3.0 mm.

9. 10. The cartridge of claim 1, further comprising leads electrically coupled to opposite ends of the heating coil, extending outward from the core, and formed of a material having a lower temperature coefficient of resistance (TCR) than the material of the heating coil.

10. The heating coil is made of any one of Kanthal, Nichrome, and stainless steel; The cartridge of claim 9 , wherein the leads are formed of any one of nickel, gold, or silver.

11. The cartridge of claim 1 , wherein the heating coil comprises 316L stainless steel.

12. The cartridge according to claim 1; a body to which the cartridge is coupled; an insertion space formed inside the body and connecting the cartridge to the outside.

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